复合芯材相变材料微胶囊的制备及表征

发布时间：2018-06-11 19:42

本文选题：相变材料 + 微胶囊　；参考：《北京服装学院学报(自然科学版)》2016年02期

【摘要】：以苯乙烯和甲基丙烯酸单体形成的高分子聚合物作为壁材,正十六烷和硬脂酸丁酯作为复合芯材,运用乳液聚合法制备双芯材相变材料微胶囊.以吐温-20为乳化剂,探讨了引发剂种类、引发剂用量和乳化剂用量对微胶囊制备的影响.对制得的相变材料微胶囊进行性能测试,表征其表面形貌、粒径大小及分布,分析其热性能和热稳定性,并计算其产率、包含量和包覆率等.结果表明:采用质量分数为1.7%的过硫酸钾为引发剂和质量分数为2.2%的吐温-20为乳化剂获得的微胶囊,表面形态稳定、光滑、饱满,粒径均一;微胶囊的热焓值较理想,相变温度为17.23℃,相变焓为54.06 J/g.
[Abstract]:Using the polymer formed by styrene and methacrylic acid monomers as wall material, positive sixteen alkane and butyl stearate were used as composite core materials, the microcapsules of dual core material phase change materials were prepared by emulsion polymerization. The effects of initiator type, dosage of initiator and the dosage of emulsifier on the preparation of microcapsules were discussed with the emulsion polymerization method. The effects of initiator and emulsifier dosage on the preparation of microcapsules were investigated. The effects of initiator dosage and emulsifier dosage on the preparation of microcapsules were investigated. The effects of initiator dosage and emulsifier dosage on the preparation of microcapsules were investigated. The surface morphology, size and distribution of the microcapsules were characterized, the thermal and thermal stability of the microcapsules were analyzed, and the yield, inclusion and coating rate were calculated. The results showed that the microgel obtained by the potassium persulfate and the mass fraction of 2.2% of the mass fraction of Twain -20 was the microgel obtained by the emulsifier. The surface morphology is stable, smooth, plump and uniform in size. The enthalpy of microcapsule is ideal, the phase transition temperature is 17.23 C, and the enthalpy of transformation is 54.06 J/g.
【作者单位】：北京服装学院材料科学与工程学院;服装材料研究开发与评价北京市重点实验室;
【基金】：北京市服装材料科研开发与评价重点实验室项目(2015ZK-05) 北京市教委面上项目(KM201510012007)
【分类号】：TB34

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