甲基丙烯酸甲酯相变微胶囊的制备及表征
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摘要
以固液混合石蜡作为芯材,使用复配乳化剂乳化混合石蜡;以甲基丙烯酸甲酯单体(MMA)作为壁材,采用原位聚合法制备石蜡相变微胶囊。考察乳化剂种类、用量以及配比、乳化聚合温度和转速对产物结构和性能的影响。结果表明:将Tween-80、Span-80以11∶9的比例复配作为乳化剂使用,乳化时间30 min,6 000 r/min搅拌5 min,乳化效果达到最佳;制得的微胶囊粒径约为507 nm,相变潜热值为37.8 J/g。
Phase change microcapsule is prepared by in-situ polymerization with solid-liquid mixed paraffin as core material emulsified by compound emulsifiers, and methyl methacrylate monomer(MMA) as wall material. The effects of emulsifier type, concentrations and ratio, temperature and speed of emulsifying polymerization on the structure and properties of the products are investigated. The results show that when the ratio of Tween-80 to Span-80 is 11 to 9, the emulsification time is 30 min, stirring at6000 r/min for 5 min, the best emulsification effect is achieved. The diameter of the microcapsule is507 nm, and the latent heat value of phase change is 37.8 J/g.
Phase change microcapsule is prepared by in-situ polymerization with solid-liquid mixed paraffin as core material emulsified by compound emulsifiers, and methyl methacrylate monomer(MMA) as wall material. The effects of emulsifier type, concentrations and ratio, temperature and speed of emulsifying polymerization on the structure and properties of the products are investigated. The results show that when the ratio of Tween-80 to Span-80 is 11 to 9, the emulsification time is 30 min, stirring at6000 r/min for 5 min, the best emulsification effect is achieved. The diameter of the microcapsule is507 nm, and the latent heat value of phase change is 37.8 J/g.
引文
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[2]孟令阔.硬脂酸相变微胶囊的制备与表征[D].上海:东华大学,2016.
[3]郑立辉,方美华,程四清,等.微胶囊化石蜡的制备和热性能[J].应用化学,2004,21(2):200-202.
[4]XU W J,CHEN H M,XIONG Y Q,et al.Preparation and characterization of n-octadecane microcapsule[J].Journal of Hunan University:Natural Sciences,2005,32(1):69-72.
[5]HAWLADER M N A,UDDIN M S,MYA K.Microencapsulated PCM thermal energy storage system[J].Applied Energy,2003,74:195-202.
[6]张秋香,陈建华,陆洪彬,等.细粒径石蜡微胶囊相变材料的制备与性能[J].高等学校化学学报,2014,35(10):2258-2264.
[7]黄全国,张凯,杨文彬,等.三聚氰胺-甲醛相变微胶囊制备及性能[J].高分子材料科学与工程,2014,3:34-38.
[8]ZHU K Y,WANG S,QI H Z,et al.Supercooling suppression of microencapsulated n-alkanes by introducing an organic gelator[J].Chem.Res.Chinese Universities,2012,28(3):539-541.
[9]时雨荃,蔡明建.无机纳米粒子填充相变微胶囊壁的研究[J].天津大学学报,2006,22(6):201-204.