摘要
以氨基官能团硅烷为偶联剂,添加乳化剂等,改善传统的甲基硅醇盐类有机硅防水剂,制备出了性能优良的新型建筑石膏用防水剂,并详细分析了其防水机理及对建筑石膏的各种性能的影响。研究结果表明:该新型建筑石膏用防水剂中有机硅单体分子之间在基材表面形成硅树脂网络,而以醇醚羧酸盐为乳化剂引入了RCOO—,并与Al 3+、Ca2+形成配合物网络结构,在基材表面另形成一层膜,增强与基材表面的结合能力,进一步提高了石膏的耐水能力;该新型建筑石膏用防水剂对石膏的强度不会产生明显的不利影响,适用于石膏当中;在石膏的软化系数的改善方面,较常用的有机硅建筑防水剂(甲基硅醇钠)有了明显提高,吸水率也有了明显降低。
The amino functional silane coupling agent and the emulsifying agent was compounded with methyl silicon alkoxide at some radio to improve the performance of the traditional organosilicon water-proofing agent （eg. methyl silicon alkoxide）, and a new type of the excellent gypsum water-proofing additive was produced. Furthermore, the waterproof mechanism and the influence of various properties on the hardened gypsum plaster was analyzed in de- tail. The results show that organic silicon monomer molecules formed a layer of silicon resin network in the substrate surface. The emulsifier of alcohol carboxylate introduced RCOO- to form coordination compound with AP＋ and Ca2＋ and formed a layer of film that enhanced combination with the suhstrate surface and further improved the water resista- nce ability of gypsum. This new type of gypsum water-proofing additive was suitable for gypsum plaster and would not produce adverse effects on the strength of it. The softening coefficient of gypsum increased and the bibulous rate decreased significantly, compared with the common organosilicon water-proofing agent （eg. methyl silicon alkoxide）.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2015年第8期126-129,共4页
Materials Reports
基金
安徽省教育厅自然科学项目(KJ2012A058)
国家十二五科技支撑计划(2011BAJ03B04-2)
安徽省徽派建筑保护专项资金(HP2013YJ103)
关键词
建筑石膏
防水剂
软化系数
防水机理
gypsum, water-proofing agent, softening coefficient, waterproof mechanism
