摘要
采用溶胶-凝胶法,以正硅酸乙酯为无机先驱体、盐酸为催化剂合成二氧化硅(SiO_2)溶胶;以过硫酸钾(K_2S_2O_8)为引发剂,将SiO_2溶胶与甲基丙烯酸-β-羟乙酯(HEMA)反应合成SiO_2/聚甲基丙烯酸-β-羟乙酯(PHEMA)凝胶。讨论了温度、无水乙醇和稀盐酸的体积比、K_2S_2O_8和HEMA的用量对溶胶-凝胶的影响。用傅里叶变换红外光谱仪和差热分析仪对SiO_2/PHEMA凝胶进行了表征。研究表明:温度越高,溶胶-凝胶时间越短;无水乙醇和稀盐酸体积比为2时,溶胶时间最短;增大HEMA、K_2S_2O_8用量,加速凝胶形成;SiO_2/PHEMA为杂化材料,其耐热性高于PHEMA。
The silica sols were prepared by the sol-gel process, tetraethoxysilane （TEOS） as the inorganic precursor, hydrochloric acid as the catalyst. Then K2S2O8 as initiator, the silica sol reacted with β-hydroxyethyl methacrylate （HEMA）, the gel of SiO2/poly-β-hydroxyethyl methacrylate （PHEMA） synthesized. The sol-gel form of influence from the temperature, the volume ratios of absolute ethyl alcohol and dilute hydrochloric acid, the amounts of K2S2O8 and HEMA were investigated. The SiO2/PHEMA was characterized by Fourier transform infrared （FTIR） spectrometry and differential thermal analyzer. The experimental results showed that higher temperature lead to gel with shorter forming time, the gel forming time was the shortest when the volume ratios of the alcohol and the dilute one was 2, with the increasing of the amount of K2S2O8 and HEMA the form of gel accelerated, and the heat resistance of the hybrid material was more excellent than PHEMA.
出处
《石化技术》
CAS
2009年第2期4-7,共4页
Petrochemical Industry Technology
