摘要： 将改性硅溶胶添加到聚丙烯酸酯乳液中制备高硅含量 SiO2/聚丙烯酸酯复合乳液(SiO2/ PA)。研究了硅溶胶用量对 SiO2/PA乳液及涂膜性能的影响，结果发现 SiO2/PA复合乳液的 SiO2 含量高达 48%，贮存稳定性好，平均粒径为 170~180nm。随着硅溶胶与聚丙烯酸酯乳液配比的增大，涂膜的耐水性、耐醇性、摆杆硬度和拉伸强度都有所提高。扫描电子显微镜(SEM)测试发现高硅含量涂膜表面平整致密，TGA分析表明 SiO2/PA杂合涂膜热稳定性良好。
关键词:
硅溶胶,
硅烷偶联剂,
SiO2/PA复合乳液
Abstract: In the present study, SiO2/polyacrylate composite emulsion (SiO2/ PA)were prepared by directly mixing polyacrylate emulsion(PA)with modified silica sol. The influence of colloidal silica content on the properties of SiO2/PA composite emulsion(SiO2/ PA) were studied. The results showed that SiO2/ PA composite emulsionwith SiO2-content up to had a good storage stability and an average particle diameter of 170~180 nm. The water and alcohol resistance, pendulum hardness tensile strength of cured film were improved with the increasing amount of colloidal silica. SEM test indicated that SiO2/ PA films displayed a emooth and densed surface. TGA analysis showed that coating films possessed good thermal stability.
Key words:
silica sol,
silane coupling agent,
SiO2/ PA composite emulsion
叶光宝, 瞿金清. 高硅含量水性木器涂料的制备与性能[J]. 涂料工业, 2013, 43(4): 44-48.
Ye Guangbao, Qu Jinqing. Preparation and Properties of High Silicon Content Waterborne Wood Coatings[J]. Paint & Coatings Industry, 2013, 43(4): 44-48.