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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
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)
关键词
阳离子光聚合
溶胶-凝胶法
纳米复合材料
cationic photopolymerization
sol-gel process
nanocomposite materials
