| Project/Area Number |
10640561
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
機能・物性・材料
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| Research Institution | KYUSHU INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
YOSHINAGA Kohji KYUSHU INSTITUTE OF TECHNOLOGY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (00040436)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | Ultrafine particles / Surface modification / Aggregation-dispersion / Inter-particle interaction / Chemical library / Colloid particles / Polymer modification / Hybrid particles / 粒子間相互作用 |
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| Research Abstract |
(1) Surface modification of monodisperse colloidal silica with polymer silane coupling agent Efficient adsorption of poly(maleic anhydride-styrene)(P(MA-ST))-silane coupling on ultrafine colloidal silica particles led to effective reaction of trimethyl silyl group with surface silanol.
(2) The reaction of P(MA-ST)-modified silica particles with amino-terminated polymer resulted in the preparation of the composite particles dispersible in low polar solvents. The surface polymer chains on P(MA-ST)-modified silica attached to the surface via 4 siloxane bondings on solid state ィイD129ィエD1Si and ィイD113ィエD1C-NMR spectra.
(3) The composite particles prepared with the two-step modification dispersed in good solvent for the secondary polymer via excluded volume effect, and in poor solvent the aggregation-dispersion was controlled through a delicate balance between the attraction of insoluble polymer chains and electrostatic repulsion among particles. Monodisperse composite particles formed colloid crystal in a good solvent for the modified polymer.
(4) Weak interactions between the surface polymer chains and the substrate molecules in suspension were evaluated by the spin-spin relaxation time (TィイD22ィエD2) on a NMR technique. It is suggested that the values are applicable to the evaluation of chemical library using the present composite particles.
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