纳米二氧化硅改性硅丙无皂乳液稳定性影响因素研究  

Study on the Influencing Factors on Stability of Nano-Silica Modified Silicone-Acrylate Soap-Free Emulsion

作　　者：周建华[1,2] 张琳[1] 陈超[1] 

机构地区：[1]陕西科技大学资源与环境学院,西安710021 [2]浙江温州轻工研究院,浙江温州325003

出　　处：《涂料工业》2010年第7期37-41,共5页Paint & Coatings Industry

基　　金：温州市科技计划项目(H20080012);国家高技术研究发展计划(863计划)项目(2008AA03Z311);陕西省自然科学研究项目(2007E110);陕西省教育厅项目(07JK202);陕西科技大学研究生创新基金

摘　　要：采用无皂乳液聚合技术和溶胶凝胶技术,合成了纳米二氧化硅改性硅丙无皂乳液。考察了反应温度、引发剂用量、反应性乳化剂用量、丙烯酸用量和正硅酸乙酯(TEOS)用量对乳液稳定性的影响。研究结果表明:当过硫酸钾(KPS)的质量分数为1%,反应性乳化剂的质量分数为3.5%,丙烯酸的质量分数为3%,反应温度为80℃时,乳液的聚合稳定性好,单体转化率高;当TEOS的质量分数小于4%,乳液具有较好的机械稳定性。Nano -silica modified silicone -acrylate soap -free emulsion was synthesized by soap -free emulsion polymerization and sol - gel technology. The effects of reaction temperature, dosage of initiator, amount of reactive emulsifier, content of acrylic acid and tetraethoxysilane （TEOS） on the emulsion polymeri- zation and emulsion stability were studied. The results showed a higher polymerization conversion and good stability when reaction temperature was 80℃, potassium persulfate （KPS） was 1% , reactive emulsifier was 3.5% and acrylic acid was 3%. When the mass fraction of TEOS was less than 4% , the emulsion gave a good mechanical stability.

关 键 词：纳米二氧化硅 有机硅 丙烯酸树脂 无皂乳液 

分 类 号：TQ630.7[化学工程—精细化工]