1991 Fiscal Year Annual Research Report

高光散乱能を有する単分散異形高分子超微粒子材料の創製

Research Project

Project/Area Number	02555185
Research Institution	Kobe University
Principal Investigator	大久保政芳神戸大学, 工学部, 助教授 (30031131)
Co-Investigator(Kenkyū-buntansha)	西野孝神戸大学, 工学部, 助手 (40180624) 上田裕清神戸大学, 工学部, 講師 (40116190) 中前勝彦神戸大学, 工学部, 教授 (40031075)
Keywords	超微粒子 / 異形粒子 / 乳化重合 / 中空粒子 / ヘテロ凝集 / アルカリ膨潤 / 高分子エマルション / ラテックス
Research Abstract	本研究の目的は大きさの揃った各種の異形及び多中空高分子超微粒子を創製する点にある。このような超微粒子はその表面の凹凸や内部の中空部が有効に作用し、高光散乱性及び高比表面積を有する有用な機能性材料として注目されるところである。平成3年度は次のような研究成果を得た。本研究者らが見いだした無乳化剤乳化重合法により作製した単分散で真球状のスチレン-アクリル酸ブチル-メタクリル酸共重合体超微粒子のアルカリ/酸二段階後処理による多中空化プロセスの内,前年度のアルカリ処理工程に引き続き、酸処理工程について検討した。アルカリ処理工程を一定にし、種々の酸処理条件(温度,pH,時間)においてそれらの影響を検討したところ、アルカリ処理工程におけると同様に粒子の多中空化に重大な影響があること、換言すれば、酸処理工程を変化させることにより、空隙の数、サイズなどの多中空状態を制御できることを明確にできた。又、本研究者らが提起した粒子径および正負電荷状態の異なる2種のポリマ-エマルションの混合系での段階的ヘテロ凝集法を用いる異形粒子の形成については前年度にほぼその可能性を明らかにすることができた。そこで、本年度はそのヘテロ凝集過程を動的光散乱法による粒子径の変化およびレ-ザ-ゼ-タ電位計による表面電位の測定により検討し、(1)安定なブレンド状態,(2)ヘテロ軟凝集状態,(3)ヘテロ融着状態,(4)未ヘテロ凝集との分離過程,の4つの素過程の様子を明確にすることが出来た。さらに、ヘテロ凝集後の異種粒子同志の適度な融着の進行を行なうための条件を探索し、その条件によって表面凹凸の程度を制御できる可能性を明らかにした。

Research Products
(13 results)

All Other

All Publications (13 results)

[Publications] Y.Nakamura,M.Yamaguchi,M.Okubo,T.Matsumoto: "Effects of particle shape and size on young's modulus of epoxy resin filled with silica particles" J.Thermosetting Plastics,Japan. 12. 1-8 (1991)
[Publications] M.Okubo,M.Fujimura,T.Mori: "The acceleration of decomposition of potassium persulfate in the presence of sodium dodecyl sulfate and polymer particles as a model of emulsion polymerization system." Colloid & Polymer Science. 269. 121-123 (1991)
[Publications] M.Okubo,Y.He,K.Ichikawa: "Analysis of"stepwise"heterocoagulation process of small cationic polymer particles onto large anionic polymer particles using dynamiclight scattering." Colloid & Polymer Science. 269. 125-130 (1991)
[Publications] M.Okubo,Y.Yamamoto,S.Kamei: "Adsorption immobilization of trypsin enzymes onto polymer microspheres having heterogeneous surfaces consisting of hydrophilic and hydrophobic parts" Chemistry Express. 6. 145-148 (1991)
[Publications] M.Okubo,Y.Katayama,Y.Yamamoto: "Preparation of micron-size monodisperse polymer microspheres having crosslinked structures and vinyl groups" Colloid & Polymer Science. 269. 217-221 (1991)
[Publications] M.Okubo,M.Shiozaki,M.Tsujihiro,Y.Tsukuda: "Preparation of micron-size monodisperse polymer particles by seeded polymerization utilizing the dynamic monomer swelling monomer method" Colloid & Polymer Science. 269. 222-226 (1991)
[Publications] M.Okubo,Y.He: "Preparation of asymmetric film by blending two kinds of polymer emulsions having greatly differetn storage stabilities." J.Appl.Polym.Sci.42. 2205-2208 (1991)
[Publications] M.Okubo,Y.Yamamoto,M.Uno,S.Kamei: "Immunoactivity of anti-bovine serum albumin antibody adsorbed on polymer microspheres having heterogeneous surfaces consisting of hydrophilic and hydrophobic parts." Chemistry Express. 6. 623-626 (1991)
[Publications] M.Okubo,Y.Mizushima,K.Misaki: "Chemical deposition coatings onto anodized aluminum plate from anionic polymer emulsion of which pH was adjusted with various kinds of acids." Chemistry Express. 6. 627-630 (1991)
[Publications] Y.Nakamura,M.Yamaguchi,A.Kitayama,M.Okubo,T.Matsumoto.: "Effect of particle size on fracture toughness of epoxy resin filled with angular-shaped silica." Polymer. 32. 2221-2229 (1991)
[Publications] Y.Nakamura,M.Yamaguchi,A.Kitayama,M.Okubo,T.Matsumoto: "Effect of particle size on impact properties of epoxy resin filled with angular-shaped silica particles." Polymer. 32. 2976-2979 (1991)
[Publications] Y.Yamamoto,M.Okubo,Y.Iwasaki: "Estimation of distribution of vinyl groups in micron-size monodisperse polymer microspheres by bromine titration method" Colloid Polymer Science. 269. 1126-1132 (1991)
[Publications] M.Okubo,K.Ichikawa,M.Fujimura: "Production of multi-hollow polymer microspheres by stepwise alkali/acid method II Alkali treatment process." Colloid Polymer Science. 269. 1257-1262 (1991)

1991 Fiscal Year Annual Research Report

高光散乱能を有する単分散異形高分子超微粒子材料の創製

Principal Investigator

大久保 政芳 神戸大学, 工学部, 助教授 (30031131)

Research Products

[Publications] Y.Nakamura,M.Yamaguchi,M.Okubo,T.Matsumoto: "Effects of particle shape and size on young's modulus of epoxy resin filled with silica particles" J.Thermosetting Plastics,Japan. 12. 1-8 (1991)

[Publications] M.Okubo,M.Fujimura,T.Mori: "The acceleration of decomposition of potassium persulfate in the presence of sodium dodecyl sulfate and polymer particles as a model of emulsion polymerization system." Colloid & Polymer Science. 269. 121-123 (1991)

[Publications] M.Okubo,Y.He,K.Ichikawa: "Analysis of"stepwise"heterocoagulation process of small cationic polymer particles onto large anionic polymer particles using dynamiclight scattering." Colloid & Polymer Science. 269. 125-130 (1991)

[Publications] M.Okubo,Y.Yamamoto,S.Kamei: "Adsorption immobilization of trypsin enzymes onto polymer microspheres having heterogeneous surfaces consisting of hydrophilic and hydrophobic parts" Chemistry Express. 6. 145-148 (1991)

[Publications] M.Okubo,Y.Katayama,Y.Yamamoto: "Preparation of micron-size monodisperse polymer microspheres having crosslinked structures and vinyl groups" Colloid & Polymer Science. 269. 217-221 (1991)

[Publications] M.Okubo,M.Shiozaki,M.Tsujihiro,Y.Tsukuda: "Preparation of micron-size monodisperse polymer particles by seeded polymerization utilizing the dynamic monomer swelling monomer method" Colloid & Polymer Science. 269. 222-226 (1991)

[Publications] M.Okubo,Y.He: "Preparation of asymmetric film by blending two kinds of polymer emulsions having greatly differetn storage stabilities." J.Appl.Polym.Sci.42. 2205-2208 (1991)

[Publications] M.Okubo,Y.Yamamoto,M.Uno,S.Kamei: "Immunoactivity of anti-bovine serum albumin antibody adsorbed on polymer microspheres having heterogeneous surfaces consisting of hydrophilic and hydrophobic parts." Chemistry Express. 6. 623-626 (1991)

[Publications] M.Okubo,Y.Mizushima,K.Misaki: "Chemical deposition coatings onto anodized aluminum plate from anionic polymer emulsion of which pH was adjusted with various kinds of acids." Chemistry Express. 6. 627-630 (1991)

[Publications] Y.Nakamura,M.Yamaguchi,A.Kitayama,M.Okubo,T.Matsumoto.: "Effect of particle size on fracture toughness of epoxy resin filled with angular-shaped silica." Polymer. 32. 2221-2229 (1991)

[Publications] Y.Nakamura,M.Yamaguchi,A.Kitayama,M.Okubo,T.Matsumoto: "Effect of particle size on impact properties of epoxy resin filled with angular-shaped silica particles." Polymer. 32. 2976-2979 (1991)

[Publications] Y.Yamamoto,M.Okubo,Y.Iwasaki: "Estimation of distribution of vinyl groups in micron-size monodisperse polymer microspheres by bromine titration method" Colloid Polymer Science. 269. 1126-1132 (1991)

[Publications] M.Okubo,K.Ichikawa,M.Fujimura: "Production of multi-hollow polymer microspheres by stepwise alkali/acid method II Alkali treatment process." Colloid Polymer Science. 269. 1257-1262 (1991)

大久保政芳神戸大学, 工学部, 助教授 (30031131)