丁基橡胶胶乳制备工艺的优化  

Optimization of preparation process of butyl rubber latex

作　　者：张乐 李辉 朱廷春 李建业 李斌 ZHANG Le;LI Hui;ZHU Ting-chun;LI Jian-ye;LI Bin(College of chemical Engineering and Materials/Hebei Key Laboratory of Heterocyclic Compounds,Handan University,Handan 056006,China)

机构地区：[1]邯郸学院化学化工与材料学院/河北省杂环化合物重点实验室,河北邯郸056006

出　　处：《合成橡胶工业》2023年第2期105-108,共4页China Synthetic Rubber Industry

摘　　要：以丁基橡胶(IIR)为原料,采用“溶解-乳化”法制备了稳定性较好的IIR胶乳,考察了乳化剂种类、乳化剂组成、pH值、油水质量比、浓缩工艺等对乳化效果和IIR胶乳产率的影响。结果表明,优化的IIR胶乳制备的乳化剂配方及制备工艺如下:乳化剂为油酸钾和Triton X-100,二者质量比为4/1;当体系pH值为10,油水质量比为4/5时,得到的IIR乳液稳定性最佳,胶乳产率最高;采用膏化工艺进行胶乳浓缩,以藻酸钠为膏化剂,占胶乳中橡胶质量分数为0.6%时浓缩效果最好;并采用离心分离工艺缩短浓缩时间,当转速为1500 r/min,离心时间为20 min时,可获得总固物质量分数约为55%的IIR胶乳,胶乳产率达90%以上。The butyl rubber(IIR)latex with good stablility was preparated by solution-emulsion method using IIR as raw material.And the effects of emulsifier type,emulsifier composition,pH value,mass ratio of oil to water and concentration process on emulsifying effect and IIR latex yield were investigated.The results showed that the optimized emulsifier formulation and preparation technology of IIR latex were as follows:The emulsifiers were potassium oleate and Triton X-100,the mass ratio of which was 4/1.When the pH value of the system was 10 and the mass ratio of oil to water was 4/5,the stability of the IIR emulsion was the best and the yield of latex was the highest.The latex was concentrated by paste method,and sodium alginate was used as paste agent.The concentration effect was best when the mass fraction of paste agent was 0.6%of the rubber in the latex.The concentration time was further shorten by centrifugal method.When the rotating speed was 1500 r/min and the centrifugation time was 20 min,the mass fraction of total solids was about 55%,and the latex yield was over 90%.

关 键 词：丁基橡胶胶乳 乳化剂 乳化工艺 浓缩工艺 稳定性 胶乳产率 

分 类 号：TQ331.4[化学工程—橡胶工业]