記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-BLACKWELL  

It was tried to prepare hybrid microcapsules composed of porous inorganic particles and epoxy resin shell and to apply to the self-healing agent. A water soluble imidazole of gelation promoting agent as the core material was microencapsulated in the porous inorganic particles, which were coated with epoxy resin. The porous inorganic particles were prepared with the interfacial reaction between sodium silicate and calcium ion in the (W/O) dispersion. In the experiment, the concentration of sodium silicate and the mixing speed to form the (W/O) dispersion were mainly changed. The porous inorganic particles were immersed in the aqueous solution dissolving imidazole and then, added in the corn oil dissolving epoxy resin to be microencapsulated with gelated epoxy resin. The hybrid microcapsules containing imidazole with the mean diameters from 200 to 400 mu m were able to be prepared and to induce the gelation reaction of epoxy resin by breaking the hybrid microcapsule shell due to heating. Copyright (c) 2013 John Wiley & Sons, Ltd.

DOI： 10.1002/pat.3202

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.4236/jcdsa.2013.33a2012

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その他リンク： http://www.scirp.org/journal/doi.aspx?DOI=10.4236/jcdsa.2013.33A2012

記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/pharmaceutics5040609

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：THE MEMBRANE SOCIETY OF JAPAN  

DOI： 10.5360/membrane.35.146

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00352299138?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS LTD  

Microencapsulation of Bistetrazol diammonium (BHT center dot 2NH(3)) as a hydrophilic powdery flame retardant was tried by the interfacial reaction method in reverse emulsion. In this microencapsulation method, water droplets containing BHT center dot 2NH(3) and hydrazine as gelation agent for epoxy resin were dispersed in the continuous phase of corn oil. When epoxy resin was added to the continuous phase, BHT center dot 2NH(3) as a core material was microencapsulated by the reaction of epoxy resin with hydrazine on the interface between the surface of water droplet and the continuous phase. The content of the core material from 70 to 85%, and the microencapsulation efficiency from 89 to ca 100% were able to be attained under the experimental conditions adopted here. Copyright (C) 2009 John Wiley & Sons, Ltd.

DOI： 10.1002/pat.1410

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

Spherical calcium carbonate vaterite crystals were synthesized and the effect of them on stabilization of suspension polymerization of methyl methacrylate was investigated. Suspension polymerization of methyl methacrylate could be stabilized with calcium carbonate vaterite crystals and sodium dodecylbenzene sulfonate of the concentrations from 25 to 100 ppm. Poly(methyl methacrylate) beads coated with spherical calcium carbonate vaterite crystals were prepared. With an increase in the concentration of sodium dodecylbenzene sulfonate from 25 to 100 ppm, the amount of calcium carbonate vaterite crystals adhered on the surface of poly methyl methacrylate bead increased and the mean diameters of the polymer beads decreased. (c) 2008 Published by Elsevier B.V. on behalf of The Society of Powder Technology Japan.

DOI： 10.1016/j.apt.2008.10.003

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：RAPRA TECHNOLOGY LTD  

Hydrophilic, solid, powdery diammonium bitetrazole (BHT.2NH(3)) as a fire retardant was microencapsulated with epoxy resin by the method of in situ gelation in droplets to give water resistance. In this method, a nonaqueous solvent was adopted as the continuous phase instead of water to prevent the hydrophilic core material from leaking out. In the experiment, it was mainly the agitation speeds during preparation of droplets containing BHT.2NH(3) and during the microencapsulation process, the gelation temperature, and the oil-soluble surfactant species that were varied. The content of core material could be increased by using a non-aqueous solvent instead of water phase. The content of core material increased with gelation temperature and independently of the agitation speeds during first droplet preparation and during the microencapsulating process. The leakage ratio increased with agitation speeds and decreased considerably with gelation temperature.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS INC  

To give water resistance to Bistetrazol-diammonium (BHT-2NH(3)) as a fire retardant agent, micro-encapsulation with epoxy resin was tried by the droplet coalescence method. In this method, two kinds of epoxy resin droplets were prepared; one is the larger epoxy resin droplet containing BHT-2NH(3) as a core material and the other the smaller droplets containing Imidazole as a gelation agent. The larger epoxy resin droplets were made to coalesce with the many smaller droplets during the micro-encapsulation process to prepare microcapsules. In the experiment, the agitation velocities for preparation of the droplets and for coalescence were mainly changed. With increase in the impeller speed, the content of core material increased, became maximum because of increase in the coalescence frequency, and then decreased because of breakup of droplets. With increase in the impeller speed, the leakage ratio of core material decreased, became minimum, and then increased. (C) 2008 Wiley Periodicals, Inc.

DOI： 10.1002/app.28211

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS INC  

1,3,5-trimethylbarbituric acid (TMBA), an amphiphilic material used widely for redox catalysts, such as organic peroxide, aromatic tertiary amine, and anhydride, was microencapsulated by the drying-in-liquid method with polyethylene methacrylate (PEMA) as a wall material. To prevent osmotically induced leakage of the core material into the continuous water phase during the microencapsulation process, TMBA was beforehand dissolved into the continuous water phase. In the experiment, the amount of TMBA dissolved and holdup of the dispersed oil phase were changed. The microencapsulation efficiency increased with the increase in the amount of TMBA dissolved but remained 36% at the highest even with the saturated level of TMBA. Also, the microencapsulation efficiency decreased with increase in holdup. The microcapsules containing TMBA were used for preparing a biological hard tissue-adhesive material and estimated for the microencapsulation effects. The adhesives containing the microencapsules were found to have excellent bonding properties and high storage stability. (C) 2008 Wiley Periodicals, Inc.

DOI： 10.1002/app.28825

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS INC  

Solid powder generating minus ion was microencapsulated by polystyrene with the drying-in-liquid method. In the microencapsulation, (R)-(+) limonene as the solvent for polystyrene and ethylene glycol as the continuous phase were adopted instead of the conventional organic solvent such as dichloromethane, benzene and toluene, and water, respectively. It was mainly investigated whether the solvents adopted here could be applied to the drying-in-liquid method or not and how the viscosity of the shell solution and the oil soluble surfactant affected the content of core material. The oil soluble surfactant made hydrophilic solid powder more hydrophobic and resulted in an increase of the content. Microcapsules containing solid powder could be prepared with the drying-in-liquid method using (R)-(+) limonene and ethylene glycol. An increase in the viscosity of the shell solution repressed the movement of solid powder particles in a droplet of the shell solution during the microencapsulation process and resulted in the higher content. (C) 2008 Wiley Periodicals, Inc.

DOI： 10.1002/app.24765

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS LTD  

Spherical silica particles were synthesized using the sol-gel method by hydrolyzing tetraethyl orthosilicate (TEOS) with an alkali catalyst, and it was investigated how the experimental conditions (the reaction temperature, the concentration and dropping rate of the hydrolysis catalyst solution) affected the size and morphology of silica particles. Furthermore, the silica particles were doped with sodium fluoride to measure their ion release ability. The mean diameters of the silica particles changed according to the reaction temperature and the dropping rate of the hydrolysis catalyst, namely the higher the reaction temperature or the slower the dropping rate the smaller are the mean diameters. The surface area of the silica particles was significantly different depending on the dropping rate of the hydrolysis catalyst, namely the slower the dropping rate the larger the specific surface area. The specific heat capacity and thermal reduction (TG) of the silica particles were significantly different according to the reaction temperature, namely the higher the reaction temperature the lower the specific heat capacity and the TG. It was found that the fluoride-retaining ability was proportional to the surface area of silica particles. The fluoride ion release was equilibrated on elapsing 5 min. Copyright (C) 2008 John Wiley & Sons, Ltd.

DOI： 10.1002/pat.1064

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS INC  

Polyurea microcapsules containing a pyrethroid insecticide were prepared by the reaction between hexamethylene diisocyanate isocyanurate and ethylenediamine in an oil-in-water emulsion. This study was performed to establish the operational conditions of preparing microcapsules by interfacial polymerization and to investigate how the operational conditions affected the characteristics of microcapsules such as the morphology, wall thickness, mean diameter, and particle size distribution. Microcapsules prepared in this study were found to be spherical and monocore. The microcapsule yields, ranging from 94 to 98%, were almost equal to the theoretical values. The wall thickness of the microcapsules increased with the diameter of the microcapsules and the concentration of hexamethylene diisocyanate isocyanurate. In comparison with the results for microcapsules prepared with a mixture of hexamethylene diisocyanate uretidione and isocyanurate, the diameters and wall thickness of the microcapsules were found to be larger. (c) 2007 Wiley Periodicals, Inc.

DOI： 10.1002/app.27238

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.11618/adhesion.43.13

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.33.363

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS INC  

To investigate the dependence of the shell thickness on both the microcapsule size and the concentration of hexamethylene diisocyanate (HMDI) and to analyze the chemical structure of the polyurea shell, polyurea microcapsules were prepared by using the reaction between HMDI uretidione/isocyanurate and ethylene diamine (EDA) in an oil-in-water emulsion. In the experiment, the concentrations of hexamethylane diisocyanate and EDA were changed. The shell thickness was correlated well with the mean size and the concentration of HMDI on the surface area per unit volume of microcapsule. From the solid-state C-13 NMR spectroscopy analysis, the uretidione and isocyanurate ring structures were found to be not changed before and after the reaction. From the wide-angle X-ray diffraction analysis, it was suggested that the chemical structure of the polyurea shell was amorphous. From the FTIR spectra analysis, it could be concluded that polyurea microcapsules were prepared by the reaction between HMDI uretidione/isocyanate and EDA.

DOI： 10.1002/app.25061

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS LTD  

We developed a method to prepare hemispherical hollow silica microcapsules (HHSM) with different affinity surfaces using spherical vaterite calcium carbonate (SVCC) as a template. The preparation process composed of the adhesion of calcium carbonate onto the surface of methyl methacrylate (MMA) droplets followed by suspension polymerization, the partial etching of calcium carbonate on the polymethyl methacrylate (PMMA) mother particle, the formation of silicon dioxide powder by sol-gel reaction and their deposition onto the etched flat surface of calcium carbonate, the surface modification of deposited silicon dioxide with silane coupling agent, the removal of the mother particle with acetone, the formation of silicon dioxide powder by sol-gel reaction and deposition onto the exposed hemispherical surface of calcium carbonate, and the surface modification of deposited silicon dioxide with silane coupling agent. The synthesized microcapsules had a complete hemispherical structure and both hydrophilic and hydrophobic surfaces. Copyright (C) 2007 John Wiley & Sons, Ltd.

DOI： 10.1002/pat.939

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

We attempted to prepare microcapsules by absorbing n-pentadecane as the phase change material (PCM) and methyl methacrylate (MMA) as the shell material into oil absorbable polymer particles.
We could prepare the microcapsules containing PCM with the polymethyl methacrylate (PMMA) shell. In the experiment, the volume of methyl methacrylate monomer and the soaking time for oil absorbable polymer particles to soak into MMA were changed stepwise.
With the increase in the volume of MMA absorbed, the diameters and mechanical strength of microcapsules were increased.
Furthermore, it was found that the amount of PCM leaking from the microcapsules was decreased with the volume of MMA absorbed. (C) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.colsurfa.2006.12.019

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS LTD  

Porous biodegradable microspheres can be prepared by using the direct melting dispersion method without any noxious organic solvents, in which the biodegradable polymer is directly melted and stirred to form the liquid-liquid dispersion followed by cooling in the continuous phase, such as ethylene glycol with the higher melting temperature than polymer.
In the experiment, polyhydroxybutyrate (PHB) was adopted as the biodegradable polymer. As particulate porogen, magnetite powder was pre-mixed into the melted polymer and removed by hydrochloric acid aqueous solution after preparation of the microspheres to make them porous. It was found that the inner surface area was significantly increased by removing magnetite powder. Copyright (C) 2007 John Wiley & Sons, Ltd.

DOI： 10.1002/pat.853

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

転相乳化後に液中乾燥を実施することにより, 顔料含有ポリエステルナノ複合粒子を調製することを試みた。<BR>実験では転相時の撹拌速度, 乳化剤種と濃度および両親媒性溶媒種を変化させ, カーボンブラック含有複合微粒子の特性に及ぼす影響を検討した。<BR>乳化剤としてポリエキシエチレンラウリルエーテルを, また両親媒性溶媒としてアセトンを添加することにより, 平均径が120nmできわめて均一性の高い複合微粒子を生成することができた。

DOI： 10.4011/shikizai1937.79.487

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その他リンク： https://jlc.jst.go.jp/DN/JALC/10016643573?from=CiNii

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3136/nskkk.53.255

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3136/nskkk.53.248

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Adhesion Society of Japan  

エポキシ樹脂封止剤の一液化に応用するために，界面硬化反応法によりエポキシ樹脂硬化剤（イミダゾール）のエポキシ樹脂によるマイクロカプセル化を試みた。実験では，反応時間，シェル材であるエポキシ樹脂濃度そして分散系の撹枠速度を段階的に変化させ，マイクロカプセルの構造，ゲルタイム，保存安定性に及ぼす影響を調べた。反応時間，エポキシ樹脂濃度そして撹拌速度を変化させることにより，マイクロカプセルの粒径，硬化剤の含有率，そしてシェル厚を制御できることが分った。結果として，保存安定性とゲルタイムを広範囲に変化させることができた。

DOI： 10.11618/adhesion.42.272

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その他リンク： https://jlc.jst.go.jp/DN/JALC/00281386923?from=CiNii

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Benzoyl peroxide (BPO) was microencapsulated with polyethyl methacrylate (PEMA) by the drying-in-liquid method to apply to a liquid type adhesive. In the experiment, two kinds of calcium carbonate with different shape and size were used as stabilizers. Microencapsulation efficiency over 90% was obtained under the experimental conditions adopted here. Microcapsules prepared were characterized for medical applications. It was found that adhesive biomaterials prepared using microcapsules had sufficient ability for initiating radical polymerization even after two-month storage at 40°C and a relative humidity of 75%. Copyright © 2006 The Society of Chemical Engineers, Japan.

DOI： 10.1252/jcej.39.994

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

Polymer microspheres coated with two kinds of solid powders were prepared by the semi-chemical recycle method of waste plastics. Magnetite (Fe3O4) and silicon carbide (SiC) were added as solid powders so as to give thermal and electric conductivity and magnetization. Waste expanded polystyrene was used as raw materials of polymer matrix of composite particles. In the experiment, the oil phase dissolving expanded polystyrene was dispersed to form the O/W dispersion in the continuous water phase in which polyvinyl alcohol and magnetite powders were added. And then, silicon carbide powder was added into the O/W dispersion. Composite particles prepared had the structure that a polymer particle was covered with two kinds of solid powders. The amount of each solid powder adhered on the surface of polymer microsphere was strongly affected by an addition time of silicon carbide powder. Furthermore, the gradient adhesion layer due to two solid powders was found to be formed on the surface of polymer microsphere. (c) 2006 Springer Science + Business Media, Inc.

DOI： 10.1007/s10853-006-6273-9

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

分散安定性向上を目的として, 金属せっけんを白色色材としたミニエマルション重合により, 白色複合ナノ粒子の調製を試みた。<BR>実験では, 白色色材の濃度と, エマルション調製条件が複合ナノ粒子の調製の可能性, 粒径分布, 分散安定性, 隠ぺい度等に及ぼす影響を検討した。結果として, 平均粒径が95-175nmの範囲にある白色複合粒子を調製することができた。調製された白色複合ナノ粒子の分散安定度は, これまでに一般に使用されている白色顔料のTiO<SUB>2</SUB>と比べてきわめて良好ではあるが, 隠ぺい度は低かった。

DOI： 10.4011/shikizai1937.78.468

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その他リンク： https://jlc.jst.go.jp/DN/JALC/10016642835?from=CiNii

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3136/nskkk.52.80

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

ミニエマルション重合により, 親水性染料とポリスチレンからなる複合ナノ粒子が調製された。実験では, 染料濃度, 重合開始剤濃度, 親水性および油溶性の界面活性剤濃度, そして油溶性界面活性剤の HLB などを変化させた。<BR>染料のマイクロカプセル化効率は, 油溶性界面活性剤濃度とともに増加し, 水溶性界面活性剤濃度とともに減少することがわかった。<BR>染料のマイクロカプセル化効率は, 油溶性界面活性剤の親水基による親水性染料の包括によって増加することが示唆された。

DOI： 10.4011/shikizai1937.78.260

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その他リンク： https://jlc.jst.go.jp/DN/JALC/10016643221?from=CiNii

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

懸濁重合により, 内部分散・被覆型複合体微粒子の調製を試みた。複合体微粒子は, カーボンブラック粉末が内部に分散し, かつ, 表面がマグネタイト粉末で被覆されたポリスチレン粒子である。<BR>実験では, マグネタイト粉末の粒径および添加量が主に変えられた。<BR>結果として, 懸濁重合により目的とした構造を有する複合体微粒子が調製された。マグネタイト粉末の粒径の減少とともに, 複合体微粒子の粒径分布はより狭くなり, また, 平均粒径は減少した。マグネタイト粉末の付着層は, マグネタイト粉末とスチレン滴間の親水・疎水性相互作用により形成されたものと思われる。さらに, マグネタイト粉末の付着層は密であり, かつ, 多層であった。

DOI： 10.4011/shikizai1937.78.45

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本食品科学工学会  

芯物質を担持したシェル材のメチルセルロース水滴とゲル化剤であるタンニン酸水滴との合一を, W/O分散系で生じさせることにより, 進行する脱水縮合反応を利用してマイクロカプセルを調製することを試みた. そして, 以下のような結果を得た.<br>(1) W/O分散系を利用した液間合一により, グルタミンを担持したメチルセルロースカプセルを調製することが可能であった.<br>(2) メチルセルロースの濃度とともに, マイクロカプセル径は大きくなるとともに, 含有率も増加した.<br>(3) いずれの条件で調製したマイクロカプセルは, 30%前後の初期バーストを示したことから, さらなる調製条件の最適化が必要である.<br>(4) マイクロカプセルの水中での膨潤破壊は観察されなかった.<br>(5) グルタミンの放出は, 未架橋部のメチルセルロースの溶解とその後のグルタミンの溶解によるものと推察された.

DOI： 10.3136/nskkk.52.406

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その他リンク： http://hdl.handle.net/10191/17606

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Polyurea microcapsules containing a pyrethroid insecticide were prepared by the reaction between hexamethylene diisocyanate (HMDI) uretidione/isocyanurate and ethylene diamine (ED) in an oil-in-water (O/W) emulsion. This study was performed to investigate how the concentrations of dimer and trimer affect the characteristics of microcapsules such as the morphology, the wall thickness, the size distribution of microcapsules, the microcapsule yield and mechanical property and to investigate the dust mite repellent effect of the microcapsules adhered to the fabrics. Microcapsules prepared in this study were 0.2-6.0 μm in size and single cored. All the microcapsule yields were almost 98%. It was found that the wall thickness of microcapsules decreases with an increase in the diameter of microcapsules and increases with an increase in the concentration of HMDI uretidione/isocyanurate. The mechanical property was increased with the concentration of HMDI uretidione/isocyanurate. Polyurea microcapsules showed a high dust mites repellent effect. Copyright © 2005 The Society of Chemical Engineers, Japan.

DOI： 10.1252/jcej.38.929

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-BLACKWELL  

We have conducted a study of composite polymer particles with a gradated resin composition by suspension polymerization, in which the resin composition gradually changes from the surface to the center of the particles. The binder resin of the polymer particles consists primarily of styrene, butyl acrylate, and methacrylic acid (MAA). Fourier transform infrared/photoacoustic spectroscopy analysis of the polymer particles by suspension polymerization has proved that MAA, having a higher polarity, concentrates near the surface of the particles, and this results in a formation similar to a core-shell structure. These composite polymer particles are excellent in blocking resistivity because the resin, containing a higher concentration of MAA, has a high glass-transition temperature. Composite polymer particles with a gradated MAA concentration could be used for toner applications in low-power hot-roll fusing electrophotography systems because the melting property of the core resin is controlled and allows fusing at lower temperatures. (c) 2005 Wiley Periodicals, Inc.

DOI： 10.1002/app.21823

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Microcapsules containing limonene oil as a core material were prepared by interfacial polycondensation polymerization between isocyanate and amine. In the experiment, emulsions were made by dispersing limonene oil in the aqueous solution of poly(vinyl alcohol) and then, microencapsulation was started. It was investigated how the adsorption layer of poly(vinyl alcohol) affected the growth rate of microcapsule shell. The growth rate of the microcapsule shell was estimated by measuring the transient shell thickness of microcapsules which were sampled out at anytime of microencapsulation process. It was found that the growth rate of microcapsule shell decreases with the adsorption amount of poly(vinyl alcohol) on the interface. Copyright © 2005 The Society of Chemical Engineers, Japan.

DOI： 10.1252/jcej.38.45

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

ソープフリー重合を利用し, 無機微粒子の表面をポリマーで被覆, カプセル化することを試みた。ここで検討された無機微粒子はTiO<SUB>2</SUB>およびFe<SUB>2</SUB>O<SUB>3</SUB>であり, またモノマーにメタクリル酸メチルとスチレンを使用した。<BR>実験では, 無機微粒子の凝集防止とカプセル化の向上を目的に重合反応前および重合途中に非イオン性界面活性剤 (Emulgen106) とイオン性界面活性剤 (ドデシル硫酸ナトリウム) を添加し, カプセル化におよぼす影響を検討した。カプセル化プロセスにおけるカプセル化状態は, 無機微粒子のゼータ電位と粒径を連続的に測定することにより評価した。<BR>無機微粒子とモノマーとの組合わせにより分散安定性やカプセル化がいちじるしく異なることが明らかになった。また, アニオン性界面活性剤の段階的添加により, とくにメタクリル酸メチルによるTiO<SUB>2</SUB>およびFe<SUB>2</SUB>O<SUB>3</SUB>のカプセル化の場合, 分散安定性とカプセル化が向上することが明らかになった。さらに本手法を用いた一部の条件において, 無機微粒子が一次粒子の状態で良好にカプセル化が行われることがわかった。

DOI： 10.4011/shikizai1937.77.303

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

In order to obtain the fundamental information required to prepare microcapsules by interfacial polycondensation polymerization, oil-in-water emulsions were prepared by dispersing limonene oil in the aqueous solution of poly(vinyl alcohol) (PVA) with different degrees of polymerization and saponification. Emulsion prepared was characterized by measuring the droplet diameters and the physical properties of emulsion. Emulsion stability was estimated by measuring the transient height of the oil phase layer and the interfacial excess concentration for each PVA. PVA with higher surface activity showed smaller occupied interfacial area due to the larger excess concentration and resulted in stabilized emulsion. © 2004 The Society of Chemical Engineers, Japan.

DOI： 10.1252/jcej.37.882

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Composite particles composed of poly(styrene-co-n-butyl acrylate) and magnetite powder treated with the various coupling agents were prepared by using suspension polymerization. The effect of the surface treatment by coupling agents on the structure of composite particles was mainly investigated by observing the dispersion state of magnetite powder in composite particles and triboelectric charge property. The treatment by the coupling agents with an unsaturated carbon bond and hydrophobic group of a long carbon chain resulted in a better inclusion of magnetic powder into composite particles. The coupling agent species greatly affected the triboelectric charge property of composite particles. It was found that a specific coupling agent with a high polarity acted as the charge controlling agent for the toner application. The effect of the surface treatment on the particle size distribution was also discussed. © 2004 The Society of Chemical Engineers, Japan.

DOI： 10.1252/jcej.37.731

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Biodegradable and controlled-release capsules composed of waste paper fibers as matrix and limonene droplets as core materials were prepared by utilizing the liquid-liquid dispersion. Encapsulation was performed due to coalescence between a droplets containing binder and fibers and those dissolving a gelling agent. In this experiment, methylcellulose as a binder and tannic acid as a gelling agent were used respectively. Paper fibers were treated hydrophobic prior to the encapsulation operation in order to improve waterproofing of capsules. It was investigated whether capsules could be prepared by this encapsulation process or not. Furthermore, it was investigated how the fiber concentration affected the morphology and release characteristics of capsules. As a result, it was found that capsules were able to be prepared due to coalescence between two kinds of droplets and the capsule morphology was extremely changed with the fiber concentration. Moreover, it was found that the change in morphology considerably affected the release characteristics. Namely, in the case of the lower fiber concentration, monocore-type capsule containing limonene droplets were formed. However, as the fiber concentration increased, multicore-type capsules were formed.

DOI： 10.1252/jcej.36.1236

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：JOHN WILEY & SONS INC  

Composite particles composed of solid powders and polymer were prepared by semichemical recycle of wasted plastics. Waste expanded polystyrene was used as raw materials of polymer matrix of composite particles. Both magnetite and silicon carbide powders were used as solid powders to give thermal and electric conductivity and magnetization, respectively. In the experiment, the oil-phase dissolving expanded polystyrene was dispersed in fine droplets into the continuous water phase. Two kinds of powders were added at the same time or separately in the O/W dispersion. Composite particles were found to have the structure that polymer particle was covered with two kinds of solid powders. The mean diameter of composite particles and the content of each solid powder were strongly affected by the addition time when silicon carbide powder was added into the dispersion. Furthermore, it was found that the gradient adhesion layer due to two solid powders was able to be formed on the surface of polymer particle. (C) 2003 Wiley Periodicals, Inc.

DOI： 10.1002/app.11920

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Silica gel microspheres were prepared by sol-gel process of silicon tetraethoxide in reverse suspension. Subsequently, titanium tetra-2-propoxide solution was added to the system for producing titania gel. The composite microspheres prepared were analyzed with optical microscopy, electron probe microanalysis, and X-ray diffraction. Lowering the titanium alkoxide concentration in the continuous phase was effective to depress the agglomeration of fine titania particles. When the titanium alkoxide solution was divided into four parts and each aliquot was added separately, the covering state with titania became more uniform. The composite microspheres prepared were suspended in dye solution under ultraviolet irradiation and examined for the possibility of treating wastewater. The dye concentration rapidly decreased more than with a commercial titania powder, due to the effects of both photodegradation and adsorption. (C) 2003 Elsevier Science Ltd. All rights reserved.

DOI： 10.1016/S0025-5408(03)00027-8

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記述言語：日本語   掲載種別：学位論文（その他）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.28.569

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Chemical Engineers, Japan  

古紙繊維をシェル材とし，リモネンを芯物質とした生分解性カプセルが単一ノズル法により調製された．マトリックス繊維のバインダーとしてメチルセルロースを採用し，タンニン酸水溶液中に滴下してゲル化することにより，カプセルを調製した．<br>メチルセルロースと古紙繊維の濃度によりカプセルの諸特性，すなわち構造，機械的強度，崩壊性，吸水特性，乾燥特性等が影響されることが分かった．

DOI： 10.1252/kakoronbunshu.27.629

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.1484

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Composite particles composed of solid powders and a polymer were prepared by semi-chemical recycle of wasted plastics. Wasted expanded polystyrene was used as a raw material. Also, both of magnetite and silicon carbide powders were used as solid powders. In the experiment, the oil phase dissolving expanded polystyrene was dispersed as much fine droplets in the continuous water phase. Two kinds of powders were added at the same time or separately in the O/W dispersion. The mean diameter of composite particles was strongly affected by the addition time when silicon carbide powder was added into the dispersion. Composite particles were found to have the structure that a polymer particle was covered with solid powders. Furthermore, it was found that the gradient adhesion layer due to two solid powders was able to be formed on the surface of a polymer particle.

DOI： 10.1252/jcej.34.1177

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Microcapsules composed of waste paper fibers and plastics were prepared by semichemical recycle method. Newspaper and expanded polystyrene (EPS) for packing electric appliances were used as the raw materials of paper fiber (FB) and plastics, respectively. In this experiment, fibers were treated with a few surface treating agents prior to the encapsulation operation in order to improve the dispersability in the nonaqueous liquid phase and then in the shell of microcapsules. Microcapsules prepared thus were found to be of single-cored type. Furthermore, it was found that the mechanical strength of microcapsules was increased by addition of fibers and there were the optimum concentrations of the surface treating agents. © 2001 John Wiley &amp
Sons, Inc.

DOI： 10.1002/app.1379

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

懸濁重合で生成された球形トナーを高勇断力を負荷することにより異形化することを試みた。異形化プロセスは, 球形トナーの融解, 液滴状トナーへの勢断力の負荷, そしてその後の変形した液滴の冷却・固化からなる。実験では, ロータとステータの狭い間隙において, ロータの回転速度と連続相粘度を段階的に変化させて高勇断力を形成した。<BR>異形化の度合いは, ローターの回転速度と連続相粘度が増加するにっれて増すことが明らかとなった。

DOI： 10.4011/shikizai1937.72.426

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Chemical Engineers, Japan  

スチレンの懸濁重合において, 固体微粉末安定剤の調製条件がポリマー粒子径に及ぼす影響について検討した.<BR>実験では固体微粉末安定剤として炭酸カルシウムを採用し, 異なる温度で調製した.調製された炭酸カルシウムの形状や粒子径は温度により大きく異なり, 結果として生成するポリマー粒子の粒子径も著しく異なった.すなわち, 20℃で調製された炭酸カルシウムを添加した場合には, 粒子径の大きなポリマー粒子が, 70℃で調製された炭酸カルシウムを添加した場合には, 粒子径の小さなポリマー粒子が生成された.

DOI： 10.1252/kakoronbunshu.25.758

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Elsevier Science Publishers B.V.  

Composite particles composed of organic polymer and inorganic powder were prepared by two methods
suspension polymerization and drying-in-liquid method. The hydrophilic powders such as nickel, magnetite and indium oxide were added into the continuous water phase. Composite particles which were uniformly covered with these powders were prepared. It was investigated how the operating conditions, such as the size of solid powder, the amounts of powders added and the impeller speed, affected the characteristics of composite particles. Copyright (C) 1999 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0927-7757(98)00462-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Kluwer Academic Publishers  

Sol-gel process of silicon alkoxide was performed in reverse suspension to limit the sites of hydrolysis and dehydration-condensation of alkoxide to the inside of the dispersed droplets and to prepare silica particles of tens μm in diameter. Acetic acid aqueous solution was used as a dispersed phase, and hexane as a continuous phase. The dispersed phase was poured into the continuous phase, in which silicon alkoxide has dissolved, with stirring to form a reverse suspension. Silica particles of 67 μm in mean diameter were obtained by calcining the gel particles produced. Effects of pH of the dispersed phase and concentration of dispersion stabilizer on the characteristics of the silica particles were discussed. The formation mechanism of the gel particle was inferred with applying Jander's model, which is often used to analyze solid phase reaction of particles.

DOI： 10.1023/A:1004579222986

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

蓄熱剤としての応用を念頭に置き, 液中乾燥法を採用して吸水性ポリマー (アクリル酸系ポリマー) のポリスチレン (PS) によるカプセル化を試みた。調製したカプセルの壁は, 微細孔を有し, PS濃度が増加するに伴い, 破壊強度が減少すること, また, 破壊強度にはカプセルの壁厚, 粒径などが依存していることなどが確認できた。吸水したカプセルの蓄熱特性として, 過冷却を生じることが分かった。

DOI： 10.4011/shikizai1937.71.291

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

スチレンの分散重合系に染料を添加することにより着色粒子の生成を試みた。実験では, 分散安定剤の種類やその添加量, 染料の種類およびその添加時間を変化させることにより, 着色粒子の生成状況, 生成粒子の平均粒径や均一性に及ぼす影響を比較検討した。さらに, 生成した粒子については, 電気レオロジー効果 (ER効果) を測定し, 実用化の可能性にっいても検討した。<BR>その結果, 分散安定剤にポリビニルピロリドンを添加した場合, 平均粒径2～3μmの単分散着色粒子が得られることが分かった。

DOI： 10.4011/shikizai1937.71.232

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Chemical Engineers, Japan  

懸濁安定剤としてリン酸三カルシウム粉末 (TCP) を使用して, スチレンの懸濁重合を実施した.そして, TCPに2, 3の界面活性剤を吸着させることにより連続水相中における帯電特性を変化させ, ポリマー粒子径に及ぼす影響を検討した.<BR>ζ電位0mV付近において, TCPは凝集したが, ポリマー上滴表面への付着量は増加した.結果として, 粒径が小さく, 均一性の高いポリマー上粒子が生成された.

DOI： 10.1252/kakoronbunshu.24.633

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.24.509

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Society of Chemical Engineers, Japan  

ポリマーと古紙繊維との複合体粒子が化学粉砕法により調製された.古紙繊維として, 新聞紙繊維が利用された.また, 廃ポリマーとして懸濁重合により生成されたポリスチレンビーズが採用された.実験では, 繊維のポリマー溶液相への親和性を調節するために, 繊維を予め二, 三種類の処理剤により処理した.調製された複合体粒子の機械的強度は, 繊維の添加によって向上した.また, 処理剤濃度には最適値が存在することが分かった.

DOI： 10.1252/kakoronbunshu.24.603

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3136/nskkk.44.199

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 色材協会  

懸濁重合によってポリマーとマグネタイトとの複合体粒子を調製した。その際, マグネタイト粉末の液液系に対する親和性を調節するために, シランカップリング剤により表面処理を行った。重合開始後, ポリマー滴の合一を抑制するためにポリビニルアルコール (PVA) を添加した。<BR>親油性の強いマグネタイトを添加した場合にはポリマー滴間の合一が起こり, 結果としてマグネタイトがポリマー粒子内部に分散した内部分散型の複合体粒子が生成した。PVA添加が早い場合には, 合一が抑制され, 結果としてマグネタイトがポリマー粒子を均一に被覆した被覆型複合体粒子が生成した。<BR>これらのことから, PVAの添加時期を調節することにより, 複合体粒子の構造を制御できることが明らかとなった。

DOI： 10.4011/shikizai1937.70.503

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1252/kakoronbunshu.23.230

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記述言語：日本語 著書種別：学術書

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記述言語：日本語 著書種別：学術書

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記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）   出版者・発行元：化学工業者  

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記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）   出版者・発行元：化学工業社  

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