【摘要】 以十二烷基苯磺酸（DBSA）为插层剂改性蒙脱土（MMT）,制得了有机蒙脱土（OMMT）,采用原位插层聚合法,以八甲基环四硅氧烷（D₄）、乙烯基三甲氧基硅烷（A-171）和OMMT为原料制备了聚有机硅氧烷/蒙脱土（PDMS/OMMT）纳米复合乳液,研究了DBSA添加工艺、OMMT用量、反应温度、A-171及乳化剂用量等对D₄转化率和乳液稳定性的影响,并采用XRD、FT-IR等手段对OMMT及PDMS/OMMT低聚体的结构进行了表征。结果表明:在反应初始阶段通过外加DBSA,可使D₄在OMMT层间开环聚合,形成剥离结构;当m（OMMT）:m（D₄）为20,反应温度为80℃、m（A-171）:m（D₄）和m（乳化剂）:m（D₄）分别为2.0和3.0时,D₄转化率达到71.3%,PDMS/OMMT乳液的稳定性最好。更多还原

【Abstract】 Polydimethylsiloxane/organophilic montmorillonite（PDMS/OMMT） nanocomposite emulsions were prepared with octamethyl cyclotetrasiloxane（D₄ ）,vinyltrimethoxysilane（A - 171） and OMMT which was prepared by modification of montmorillonite（MMT） with dodecylbenzene sulfonate acid（DBSA） as intercalating agent.The effect of charging technology of DBSA,amount of OMMT,reaction temperature and amount of A - 171 and emulsifier on conversion rate of D₄ and the stability of emulsions were discussed.The structure of OMMT and PDMS/OMMT oligomers were characterized by XRD and FT - IR.The results showed that adding of DBSA at early stage of reaction was beneficial for the ring - opening of D4 within the OMMT layers,forming peeled structure.When m（OMMT）:m（D₄） ratio was 20,reaction temperature was 80℃,m（A-171）:m（D₄） and m（emulsifier）:m（D₄） were 2.0 and 3.0,respectively,the conversion rate of D4 was 71.3%and the stability of PDMS/OMMT was the best.更多还原