摘要
为解决石蜡作为相变材料在实际应用中产生的高温易流淌、易泄露、分布不均匀等问题,以甲基丙烯酸甲酯(MMA)和甲基丙烯酸(MAA)共聚物(P(MMA-co-MAA))为壁材、58#石蜡为芯材,采用悬浮聚合法制备了相变微胶囊,并采用傅里叶红外光谱仪、场发射扫描电镜、差示扫描量热仪、热重分析等手段对微胶囊的化学结构、表观形貌、储热性能以及热稳定性等进行了表征。结果表明,当m(MMA)∶m(MAA)为9∶1,乳化剂PVP的质量分数为5%,聚合时间为5h,芯壁比为2∶1时,制备的微胶囊形貌较好。相变潜热和芯材石蜡质量分数较高,分别达到112.95J/g和72.99%。
Paraffin microencapsulation can solve the problems of paraffin wax as phase-change material in the practical application,such as flowing in high temperature environment and leaking easily,uneven distribution,etc. Microencapsulation of parafin as core material was carried out by means of suspension-like the copolymerization of methyl methacrylate (MMA) with methacrylic acid (MAA). Chemical compositions,surface morphologies,thermal storage properties and stabilities of the microcapsules were characterized by Fourier transform infrared spectrometer(FTIR),scanning electron microscope(SEM),differential scanning calorimeter(DSC) and thermogravimetric analysis(TGA),respectively. The results showed that the microcapsules containing phase change material (microPCMs) with better morphology and higher phase-change latent heat and mass fraction of paraffin wax prepared when the mass ratios of MMA/MAA and core/shell were respectively 9∶1 and 2∶1,the mass fraction of emulsifier PVP was 5%,the polymerization time was 5 h.
作者
胡荣荣
李凤艳
赵天波
Hu Rongrong;Li Fengyan;Zhao Tianbo(School of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《精细石油化工》
CAS
北大核心
2019年第4期63-68,共6页
Speciality Petrochemicals
基金
国家自然科学基金(11472048)
