论文部分内容阅读
直接从无定型二氧化硅出发,研究了与乙二醇、氢氧化钾反应,生成高反应活性的五配位硅钾化合物,再与2 氯乙醇反应制备双羟基四配位硅化合物,然后通过溶胶—凝胶法制备了双羟基四配位硅/聚乙烯醇复合膜,并分析了膜的热性能,发现改性PVA复合膜的热性能有所降低;但膜的透明性和韧性基本没变;说明四配位硅水解后得到的硅醇基与PVA中的羟基发生了缩合作用.
Directly from the amorphous silica, the reaction with ethylene glycol and potassium hydroxide to produce five-coordinated high-activity silicon potassium compounds, and then reacted with 2 chloroethanol prepared dihydroxy four coordination silicon compounds, and then by Hydroxy-tetrahedral coordination silicon / polyvinyl alcohol composite films were prepared by sol-gel method, and the thermal properties of the films were analyzed. The thermal properties of the modified PVA composite films were reduced. However, the transparency and toughness of the films were almost not The results showed that the silanol groups obtained after hydrolyzed with tetrahedral silicon were condensed with hydroxyl groups in PVA.