环氧树脂用硅溶胶的制备和表征  

Preparation and characterization of silicon sol-gel used for epoxy resin

作　　者：张剑[1] 何颖[1] 赵景丽[1] 

机构地区：[1]西北工业大学365所,陕西西安710072

出　　处：《中国胶粘剂》2010年第3期13-16,共4页China Adhesives

摘　　要：以正硅酸乙酯(TEOS)作为溶胶-凝胶(sol-gel)过程的先驱体,在酸、碱性催化剂作用下制备环氧树脂(EP)用硅溶胶。探讨了酸、碱性条件下乙醇和水的用量对sol-gel过程的影响,并采用傅里叶红外光谱(FT-IR)、透射电镜(TEM)法对硅溶胶的结构进行了表征与分析。结果表明:在酸性(或碱性)条件下,n(乙醇)∶n(TEOS)=2∶1(或4∶1)、n(TEOS)∶n(水)=1∶2是最佳配比;酸性条件下制取的液态硅溶胶体系比较均匀,并具有线型结构;碱性条件下制取的液态硅溶胶具有体型结构,并且易团聚在一起,形成微粒聚集体。A silicon sol-gel was prepared by tetraethyl orthosilieate （TEOS） as precursor of sol-gel process under acid or alkaline catalysis. The influences of ethanol or water contents were investigated on sol-gel process under acid or alkaline condition. The structure of silicon sol-gel was characterized by FT-IR and SEM methods. The resuhs showed that the optimal materiel ratio was obtained when molar ratio of n（ethanol）：n（TEOS） was 2：1 under acid condition or 4：1 under alkaline condition, and molar ratio of n（TEOS）：n（water） was 1：2. The liquid silicon sol-gel which was prepared under acid condition had linetype structure and more homogeneous systems, but the liquid silicon sol-gel which was prepared under alkaline condition had dimensional structure and unhomogeneous systems with particle-congeries.

关 键 词：正硅酸乙酯 溶胶-凝胶 乙醇 水 盐酸 氨水 

分 类 号：TQ433.52[化学工程] TQ433.437