聚脲硫黄微胶囊的制备与表征  

Preparation and Characterization of Polyurea Microcapsules Filled with Sulfur

作　　者：李杰[1] 刘红研[1] 汪树军[1] 古正举 游龙[1] 

机构地区：[1]中国石油大学重质油加工国家重点实验室,北京102249 [2]达州市科学技术局,四川达州636250

出　　处：《橡胶工业》2011年第11期681-686,共6页China Rubber Industry

摘　　要：以升华硫为芯材、聚脲为壳材,采用界面聚合法制备聚脲硫黄微胶囊,研究反应时间和乙二胺(EDA)/甲苯二异氰酸酯(TDI)摩尔比对微胶囊产量的影响以及微胶囊包覆率的影响因素。结果表明:反应时间和EDA/TDI摩尔比对微胶囊产量的影响较小,最佳的反应时间为2h,EDA/TDI摩尔比为1.5;当明胶质量分数为0.03、乳化剂OP-10用量为0.5g、水油相比为1.2、搅拌速率为200r.min-1时,微胶囊的包覆率较高。扫描电子显微镜分析表明,聚脲硫黄微胶囊的形态规则,热稳定性较好。Using sublimed sulfur as core material and polyurea as shell material,the polyurea microcapsules filled with sulfur were prepared by interfacial polymerization,and the effect of reaction time,molar ratio of ethylenediamine（EDA） and toluene-2,4-diisocyanate（TDI） on the microcapsule production,and influential factors of microcapsule coating rate were investigated.The results showed that,the reaction time and EDA/TDI molar ratio had little effect on the microcapsule production.The optimal reaction time was 2 h,and the optimal molar ratio of EDA/TDI was 1.5.The microcapsule coating rate was optimized when the mass fraction of gelatin was 0.03,addition level of emulsifier OP-10 was 0.5 g,mass ratio of water phase and oil phase was 1.2,and stirring speed was 200 r·min-1.The microcapsules were in regular form shown in SEM,and the thermal stability was good.

关 键 词：界面聚合 微胶囊 硫黄 

分 类 号：TQ330.385[化学工程—橡胶工业]