丙二醇对四甲氧基硅烷水解缩聚行为的影响  

Influence of Propylene Glycol on Hydrolytie Polyconden-sation of Tetramethoxysilane

作　　者：陈小涵 周金赫 胡吉明[1] CHEN Xiaohan;ZHOU Jinhe;HU Jiming(Department of Chemistry,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《中国腐蚀与防护学报》2022年第5期717-723,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(52071283)。

摘　　要：1,2-丙二醇沸点184.8℃、闪点107.2℃,能与水和乙醇混溶且安全无毒,是一种绿色环保型溶剂,可能是目前常用硅烷处理液中高乙醇含量导致高安全风险的解决方案之一。本文采用质子核磁共振(^(1)H NMR)和MALDI-TOF质谱技术对4种不同水解环境下四甲氧基硅烷的水解缩聚动力学进行了研究,主要考察丙二醇的影响。结果显示,在溶液中水含量较低或中性环境下,丙二醇的加入显著提高硅烷的水解和缩聚速度;当溶液中的水含量较高且酸性环境下,由于硅烷本身的水解和缩聚速度较高,其受丙二醇的影响变得不再明显。Propylene glycol has many merits,such as high boiling point(184.8℃),high flash point(107.2℃),nontoxicity and can be miscible with water and ethanol.These make propylene glycol be an environment-friendly and safe solvent that may be a promising alternative to commonly used ethanol or methanol solvent in silanization solution.In this paper,the kinetics of hydrolytie polycondensation of tetramethoxysilane in four environments with different water content and pH value with the addition of propylene glycol were systematically investigated by means of proton nuclear magnetic resonance(^(1)H NMR)and MALDI-TOF mass spectrometry.The results showed that the addition of propylene glycol remarkably promoted the rate of hydrolytie polycondensation of silane in low water content or neutral environment,however the above effect caused by propylene glycol can be ignored due to the high rates of hydrolytie polycondensation of silane itself when the water content is higher or the pH of solution is relatively lower.

关 键 词：四甲氧基硅烷 丙二醇 溶剂 水解 缩聚 

分 类 号：TG172[金属学及工艺—金属表面处理]