有机硅改性PMMA壁材相变储能微胶囊制备与性能  

Preparation and Properties of Phase Change Energy Storage Microcapsules based on PMMA Capsule Shells Modified by Organosilicon

作　　者：王中立[1,2] 胡先海 吴礼丽[1,2] 谢金刚[1,2] 江照雯 Wang Zhongli;Hu Xianhai;Wu Lili;Xie Jingang;Jiang Zhaowen(College of Architectural Engineering,Anhui Vocational and Technical College,Hefei 230011,China;Anhui Key Laboratory of AdvancedBuilding Materials,Hefei 230022,China;State Grid Anhui Maintenance Company,Hefei 230061,China)

机构地区：[1]安徽职业技术学院建筑工程学院,合肥230011 [2]安徽建筑大学安徽省先进建筑材料重点实验室,合肥230022 [3]国网安徽省电力有限公司检修分公司,合肥230061

出　　处：《工程塑料应用》2021年第10期12-16,23,共6页Engineering Plastics Application

基　　金：国家自然科学基金面上项目(51573001);安徽省高校科学研究项目(KJ2020ZD76,KJ2018A0707,KJ2020A1033)。

摘　　要：以石蜡作为芯材,以有机硅改性聚甲基丙烯酸甲酯(PMMA)作为壁材制备了相变微胶囊(MicroPCMs)。采用傅里叶变换红外光谱、扫描电子显微镜、差示扫描量热分析、热重分析等方法分析了MicroPCMs的产物成分、表观形貌、储热能力和热稳定性。结果表明,随着含硅聚氨酯预聚体含量的提高,MicroPCMs表面逐渐趋于致密和光滑,相变焓和石蜡含量也随之提高,最优时熔融焓达98.6 J/g,结晶焓达97.9 J/g,石蜡质量分数达70.3%,耐热性也随之提高,最优时第一阶段和第二阶段最大分解速率温度分别为335.6℃和442.1℃。Micro phase change microcapsules(MicroPCMs)were prepared by using paraffin as core material and silicone modified polymethacrylate(PMMA)as capsule shell.Fourier transform infrared spectroscopy(FTIR),scanning electron micros-copy(SEM),differential scanning calorimetry(DSC)and thermogravimetric(TG)analysis were used to analyze the composition,morphology,thermal storage capacity and thermal stability of MicroPCMs.The results show that with the increase of the content of silicon-containing polyurethane prepolymer,the surface of MicroPCMs tends to be compact and smooth,and the enthalpy of phase transformation and paraffin content also increase.Under the optimal conditions,the melting enthalpy is 98.6 J/g,the crystallization enthalpy is 97.9 J/g,and the paraffin content is 70.3%.The heat resistance also increases.Under the optimal conditions,the maxi-mum decomposition rate temperature in the first stage is 335.6℃,and in the second stage is 442.1℃.

关 键 词：微胶囊化 储能 石蜡 有机硅 聚甲基丙烯酸甲酯 

分 类 号：TB34[一般工业技术—材料科学与工程]