| 摘要 |
PURPOSE: An organic silica precursor with hydrophilic segments and hydrophobic segments and silica/amphiphilic polymer composite nanoparticles using the same are provided to obtain the silica nanoparticles with water dispersibility and various hydrophilic substance supporting ability. CONSTITUTION: An organic silica precursor with a hydrophilic segment and a hydrophobic segment has a structure of chemical formula 1. The molecular weight of polyethylene glycol is 600-15,000. A method for preparing a bridged organic silica precursor comprises: a step of stirring and reacting polypropylene triol or glycerol with diisocyanate of toluene diisocyante, isophorone diisocyanate, methylene diisocyanate, methylene diphenyl diisocyanate, hexamethylene diisocyanate, xylene diisocyanate, or tolidine diisocyanate in a molar ratio of 1:3; a step of adding two or more of methoxy(polyethylene oxy)propyltrimethoxy silane, hydroxymethyl triethoxy silane, aminopropyl triethoxy silane, bis(trimethoxysilane siylypropyl)amine, and (3-glycidoxypropyl)trimethoxy silane in a molar ratio of 1:1; and a step of further adding polyethylene oxide and stirring.
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