摘要
以甲基丙烯酸甲酯-丙烯酸甲酯共聚物P(MMA-co-MA)为壁材,以石蜡为芯材,采用乳液聚合法制备了适用于建筑围护结构的相变材料微胶囊(MEPCM)。利用扫描电镜(SEM)、差示扫描量热仪(DSC)、傅里叶红外光谱(FT-IR)、热重分析仪(TGA)、激光粒度分析仪对产品的表面形貌、热物理性能、化学结构、粒径等进行了表征。探讨了十二烷基硫酸钠(SDS)、十二烷基苯磺酸钠(SDBS)、十六烷基三甲基溴化铵(CTMAB)、辛烷基酚聚氧乙烯醚-10(OP-10)对微胶囊形貌的影响。结果表明,以OP-10为乳化剂,芯壳质量比为1.2∶1时,可获得平均粒径为252.17 nm,相变温度为25.12℃,焓值为61.28 J/g,包裹率为71.29%,表面规整均一的球形微胶囊。产物相变温度处于人体舒适范围内,且相变焓值较大,适用于建筑节能。
The microcapsule for phase change material (MEPCM)was prepared by emulsion polymerization method using paraffin as core material,and methyl methacrylate,methacrylate copolymer (P(MMA-co-MA)) as shell,which was applicable to building envelope.The morphology,thermal performance,chemical struc-ture,size distributions of MEPCM were characterized by SEM,DSC,FT-IR,TGA,laser particle analyzer. The experiment was used to investigate the influence of SDS,SDBS,CTMAB,OP-10 on microcapsule morpholo-gy.The results showed that MEPCM prepared at the core-to-shell ration of 1.2 and OP-10 emusifier,had a spherical structure,and excellent thermal stability.The mean diameter,melt point,latent heats,encapsulation efficiency of MEPCM were 252.17 nm,25.12 ℃,61.28 J/g and 71.29%,respectively.That was,the phase tran-sition temperature of microcapsule was in human body comfortable zone,and the phase change enthalpy was high,so it was applicable to building energy efficiency.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第19期19075-19079,共5页
Journal of Functional Materials
基金
科技部国际合作资助项目(2013DFG60080)
广州市科技计划资助项目(2012J5100003)
