含氟硅乳液防水剂制备及其对石膏性能的影响  

Preparation of Waterproof Agent of Emulsion Containing Fluorine and Silicone(FSE) and Its Effect on Performance of Gypsum

作　　者：潘红[1] 李国忠[1] 

机构地区：[1]济南大学建筑材料制备与测试技术山东省重点实验室,山东济南250022

出　　处：《建筑材料学报》2013年第2期226-231,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50972051)

摘　　要：采用梯度乳液聚合的方法合成了1种含氟硅乳液(FSE)防水剂,并利用傅里叶转换红外光谱分析仪、整体旋转接触角测量仪和X射线光电子能谱仪对FSE乳胶膜进行结构表征与性能分析.考察FSE防水剂对石膏试样抗折强度、抗压强度以及耐水性能的影响,探讨了FSE防水剂对石膏强度及耐水性能的改性机理.结果表明:合成的乳液大分子中引入了氟、硅单体,因而其乳胶膜具有较优的憎水性能;掺加FSE防水剂可改变石膏晶体的形貌,使石膏晶体之间搭接紧密,晶间孔隙减少,因此石膏试样的抗折、抗压强度得到提高;FSE乳胶膜具有堵塞石膏硬化体微细孔隙或改变石膏硬化体大孔隙内表面能的作用,进而阻碍水分的渗入,因此掺FSE防水剂石膏试样的耐水性能得到改善.Waterproof agent of emulsion containiiag fluorine and silicone（FSE） was prepared by the method of gradient emulsion polymerization. The techniques of Fourier transform infrared spectroscopy, integralrotation contact angle and X-ray photoelectron spectroscopy were used to analyze FSE latex film structure and its performance. The FSE waterproof agent was added into gypsum, and its effects and action mechanisms on flexural strength, compressive strength and water-resistance of gypsum samples were studied. The research indicates that the fluorine and silicone monomers have been effectively introduced into the molecular structure of emulsion in the process of synthesis, which results in the latex film excellent hydrophobic performance. The FSE waterproof agent binds the crystal closely and reduces the porosity in the crystal to change the gypsum crystal morphology and improve the flexural strength and compressive strength of gypsum, sample. The FSE latex film fills the microscopic pores and changes the inner surface energy of macropores of hardened gypsum, so the water-resistance of gypsum sample is improved.

关 键 词：含氟硅乳液 防水剂 石膏 接触角 耐水性能 

分 类 号：TQ177.32[化学工程—硅酸盐工业]