摘要
采用乳液聚合法制备了丙烯酸酯-乙烯基三乙氧基硅烷共聚乳液.用全反射-傅立叶红外光谱仪(ATR-FTIR)对共聚物膜结构进行了表征.考察了VTES与丙烯酸酯用量比对共聚乳液的绝对黏度、共聚物膜的交联度及亲水性、溶胀吸附性能的影响,最后计算了共聚物膜在乙醇和水中的扩散系数.实验结果表明:VTES与丙烯酸酯发生自由基聚合;随着VTES与丙烯酸酯用量比的增大,共聚乳液的绝对黏度逐渐增加,共聚物膜的交联度及接触角逐渐增大.提高乙醇浓度或者增加温度,都可以提高共聚物膜在乙醇/水体系中的溶胀度;VTES与丙烯酸酯用量比为0.15的共聚物膜在乙醇中的扩散系数最大,为0.023 09×10-4m2/s;VTES与丙烯酸酯用量比为0.02的共聚物膜在水中的扩散系数最大,为0.023 57×10-4m2/s.
The emulsions of acrylate and vinyl triethoxysilane （VTES） were prepared by emulsion polymerization. The structure of copolymer was characterized by ATR-FTIR. The effect of ratio of VTES to acrylate on dynamic viscosity of emulsions, degree of cross linking, hydrophilicity and swelling performance of membranes were investigated, diffusion coefficients of membranes in water and ethanol were obtained by the swelling experiments. The FT1R results indicate that organic functional silanes are copolymerized with acrylate monomer thoroughly. With increasing ratio of VTES to acrylate, dynamic viscosity of emulsion is increasing, degree of cross linking and contact angle of membranes are increasing. Increasing concentration of ethanol or sorption temperature can improve the degree of swelling of membranes. Diffusion coefficient of membrane of 0.15 VTES loading （VTES/acrylate） in pure ethanol is 0. 023 09 ×10^-4m2/s, the diffusion coefficient of membrane of 0. 02 VTES loading （VTES/acrylate） in pure water is 0. 02357×10^-4m2/s.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2011年第6期35-40,共6页
Membrane Science and Technology
基金
国家自然科学基金资助项目(20866007)
航空科学基金项目(ZF20081506)
江西省教育厅科技项目(GJJ09488)
南昌市科技攻关重点项目(DA200902109)
