阳离子光聚合协同溶胶-凝胶法制备环氧/SiO_2纳米复合材料及性能研究  

Preparation and properties of epoxy/SiO_2 nanocomposite materials by cationic photopolymerization and sol-gel process

作　　者：李镇江[1,2,3] 梁玮[1,2,3] 张林[2,3] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [3]西南科技大学-中国工程物理研究院激光聚变研究中心,极端条件物质特性联合实验室,四川绵阳621010

出　　处：《功能材料》2013年第3期313-316,共4页Journal of Functional Materials

基　　金：中物院双百人才基金资助项目(20088074)

摘　　要：以正硅酸乙酯(TEOS)为无机前驱体,γ-缩水甘油醚氧基丙基三甲氧基硅烷(GPTS)为偶联剂,1,6-己二醇二缩水甘油醚(HDGE)为反应单体,三芳基六氟磷酸硫鎓盐为光引发剂,通过阳离子光固化和溶胶-凝胶过程制备了含SiO2纳米结构的环氧/SiO2复合材料。通过XRD、XPS、DSC、TGA和紫外-可见分光光谱仪表征测试了复合材料的结构、热性能以及光学性能。研究表明,在紫外光作用下HDGE发生环氧开环聚合,同时光解产生的强质子酸催化烷氧基硅烷水解缩合原位生成纳米SiO2;生成的SiO2均匀地分散在聚合物基质中且显著地提高了HDGE的玻璃化转变温度(Tg)以及热分解温度(Td),复合材料的光透过率较好。UV-curable epoxy/SiO2 nanocomposite materials were prepared by using tetraethyl orthosilicate（TEOS） as inorganic precursor,3-methacryloxypropyltrimethoxysilane（GPTS） as coupling agent,1,6-hexanediol diglycidyl ether（HDGE） as polymerizable monomer and triphenylsulfonium hexafluorophosphate salt（PI-432） as photo initiator through a dual-cure process involving cationic photopolymerization of epoxy groups and subsequent condensation of alkoxysilane groups.The structures,thermal and optical properties of nanocomposite materials were characterized by XRD,XPS,DSC,TGA and UV-Vis spectral spectrometer.The results showed that in-situ generated nano-SiO2 dispersed uniformly in the polymer matrix and the nanocomposite materials＇ glass transition temperature and thermal decomposition temperature improved a lot compared with pure HDGE,on the other hand,the nanocomposite materials＇ optical properties is also very good.

关 键 词：阳离子光聚合 溶胶-凝胶法 纳米复合材料 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]