洼改性苯丙乳液的粒径与成膜耐水性.pdfVIP

学兔兔 钎癯建 中国科技核心期刊 硅改性苯丙乳液的粒径与成膜耐水性 臧金燕 ，祁蕾 ，吴金丽 ，鲁倩 ，张福强 (1．河北工业大学 化工学院，天津 300130； 2．石家庄市协和药业有限公司，河北 石家庄 050000) 摘要：以乙烯基j乙氧基硅烷(VTES)为共聚单体，制备了改性苯丙乳液，并研究了VTES用量、乳化剂的组成与用量对乳液粒 径和吸水率的影响。结果表明，硅单体的引入提高了乳液粒子的疏水性，乳液的耐水性明显增强，VTES用量为2．0％时，成膜吸水率 由18．4％降至7．3％，有机硅单元的表面张力较低，导致粒径增大和体系稳定性下降。粒径分析结果表明，阴离子型乳化剂用量或乳 化剂总量的增加，体系的稳定性提高，乳液粒径随之减小，当乳化剂用量为2．5％时，乳液粒径约为75 nm。 关键词：硅单体；苯丙乳液；耐水性；粒径分析；吸水率 中图分类号：TU58+1；TQ331．4 文献标识码：A 文章编号：1001—702X(2013)07—0069—03 Particle size and water resistance of silicone modified styrene acrylate emulsion ZANG Jinyan ，QI Lei ，WU Jinli ，LU Q 帆。，ZHANG Fuqiang (1．School of Chemical Engineering and TechnMogy，Hebei University of Technology，Tia~jin 300130，China： 2．Shijiazhuang Xiehe Pharmaceutical Co．Ltd．，Shijiazhuang 050000，Hebei，China) Abstract：A modified styrene acrylate emulsion was prepared thmugh copolymerization with vinyltrieth0xysilane(VTES)．The effects of VTES dosage，emulsifier type and dosage on the latex particle size and water absorption of film were investigated．The results showed that introduction of silicone monomer enhanced the hydrophobicity of latex，and improved water resistance．When the VTES dosage was 2．0％，the water absorption reduced from 18-4％ to 7I3％．The surface tension of silicone units being low，latex particle size increased and the latex stability reduced．Particle size analysis showed that latex stability improve and particle size reduce along to the increase of anionic emulsifier or total emulsifier content．When emulsifier,dosage was 2．5％．the late