以γ-甲基丙烯酰氧丙基三(三甲基硅氧基)硅烷(TRIS)为原料、十八烷基聚醚丙烯酸酯三甲基氯化铵和烷基酚聚氧乙烯基醚为复合乳化体系、2,2'-偶氮二异丁基脒二盐酸盐为引发剂,采用预乳化乳液聚合反应,制备了阳离子型聚甲基丙烯酰氧丙...以γ-甲基丙烯酰氧丙基三(三甲基硅氧基)硅烷(TRIS)为原料、十八烷基聚醚丙烯酸酯三甲基氯化铵和烷基酚聚氧乙烯基醚为复合乳化体系、2,2'-偶氮二异丁基脒二盐酸盐为引发剂,采用预乳化乳液聚合反应,制备了阳离子型聚甲基丙烯酰氧丙基三(三甲基硅氧基)硅烷(PTRIS)乳液。探讨了预乳化方法对单体预乳化液粒径和稳定性的影响;采用正交实验考察了引发剂用量、乳化剂用量、反应温度、反应时间对乳液性能的影响;采用红外光谱对聚合物结构进行表征,并研究其表面性能。结果表明,采用机械搅拌辅助超声均质的方法能获得粒径为229.4 nm、放置30天不分层的单体预乳化液;其乳液聚合反应的最佳条件为:引发剂用量为单体质量的0.75%、乳化剂用量为单体质量的3%、反应温度为75℃、反应时间为4 h,在此条件下制得的PTRIS乳液外观均匀、单体转化率达到94.8%、无凝胶生成、平均粒径357.5 nm、多分散系数0.145、Zeta电位20.2 m V、稳定性良好;经阳离子型PTRIS乳液整理的棉布对水的接触角达135°,对二碘甲烷的接触角达117°,表面能为3.82 m N/m,具有优异的疏水疏油性能。展开更多
Methacrylyloxypropyl modified inorganic/organic hybrid mesoporous materials have been synthesized via an HCl catalyzed sol gel process in the presence of citric acid (CA) as a nonsurfactant template, which involves a ...Methacrylyloxypropyl modified inorganic/organic hybrid mesoporous materials have been synthesized via an HCl catalyzed sol gel process in the presence of citric acid (CA) as a nonsurfactant template, which involves a combination of 3 (trimethoxysilyl)propyl methacrylate (MSMA) and tetraethoxysilane (TEOS) as precursor species.The CA nonsurfactant is removed by extraction with water, resulting in inorganic/organic hybrid mesoporous materials with high surface area (e.g. 900?m 2·g -1 ) and large pore volume (e.g. 0 55?cm 3·g -1 ).The surface area, pore volume and pore diameter increase slightly with increasing the content of CA.The products were characterized by XRD, N 2 adsorption desorption and FT IR.展开更多
文摘以γ-甲基丙烯酰氧丙基三(三甲基硅氧基)硅烷(TRIS)为原料、十八烷基聚醚丙烯酸酯三甲基氯化铵和烷基酚聚氧乙烯基醚为复合乳化体系、2,2'-偶氮二异丁基脒二盐酸盐为引发剂,采用预乳化乳液聚合反应,制备了阳离子型聚甲基丙烯酰氧丙基三(三甲基硅氧基)硅烷(PTRIS)乳液。探讨了预乳化方法对单体预乳化液粒径和稳定性的影响;采用正交实验考察了引发剂用量、乳化剂用量、反应温度、反应时间对乳液性能的影响;采用红外光谱对聚合物结构进行表征,并研究其表面性能。结果表明,采用机械搅拌辅助超声均质的方法能获得粒径为229.4 nm、放置30天不分层的单体预乳化液;其乳液聚合反应的最佳条件为:引发剂用量为单体质量的0.75%、乳化剂用量为单体质量的3%、反应温度为75℃、反应时间为4 h,在此条件下制得的PTRIS乳液外观均匀、单体转化率达到94.8%、无凝胶生成、平均粒径357.5 nm、多分散系数0.145、Zeta电位20.2 m V、稳定性良好;经阳离子型PTRIS乳液整理的棉布对水的接触角达135°,对二碘甲烷的接触角达117°,表面能为3.82 m N/m,具有优异的疏水疏油性能。
文摘Methacrylyloxypropyl modified inorganic/organic hybrid mesoporous materials have been synthesized via an HCl catalyzed sol gel process in the presence of citric acid (CA) as a nonsurfactant template, which involves a combination of 3 (trimethoxysilyl)propyl methacrylate (MSMA) and tetraethoxysilane (TEOS) as precursor species.The CA nonsurfactant is removed by extraction with water, resulting in inorganic/organic hybrid mesoporous materials with high surface area (e.g. 900?m 2·g -1 ) and large pore volume (e.g. 0 55?cm 3·g -1 ).The surface area, pore volume and pore diameter increase slightly with increasing the content of CA.The products were characterized by XRD, N 2 adsorption desorption and FT IR.
