悬浮聚合制备交联聚苯乙烯石蜡微胶囊及性能研究

Preparation of Crosslinked Polystyrene Paraffin Microcapsules by Suspension Polymerization and Properties Research

以聚苯乙烯为壁材,58#石蜡为芯材,加入交联剂采用悬浮聚合法制备了交联型微胶囊。考察了聚合温度、引发剂质量分数、交联剂种类及芯壁比对微胶囊的影响。采用FT‐IR、SEM、DSC、TG表征了微胶囊的结构、形貌、储热性能及热稳定性能。结果表明,聚合温度80℃,引发剂AIBN质量分数2%时制备的微胶囊球形貌好;采用交联剂DVB制备的微胶囊碎屑少,无团聚现象,热稳定性好;以芯壁比3∶1制备的微胶囊相变焓为152.2 J/g,芯材质量分数为82.2%,储热性能最好。

Cross-linked microcapsules were prepared by suspension polymerization with polystyrene as the wall material and 58#paraffin as the core material.The effects of polymerization temperature,initiator dosage,crosslinker type and core-wall ratio on microcapsules were investigated.The structure,morphology,heat storage performance and thermal stability of microcapsules were characterized by FT-IR,SEM,DSC and TG.The experimental results show that the microcapsules prepared by the polymerization temperature of 80℃and the initiator AIBN 2%have good spherical shape.The microcapsules prepared by the cross-linking agent DVB have less clastic debris,no agglomeration and good thermal stability.The microcapsules prepared by the core wall ratio of 3∶1 have a phase transition enthalpy of 152.2 J/g,a core material content of 82.2%,and the best heat storage performance.