不同类型SMA乳化剂对石蜡相变微胶囊形貌和性能的影响(英文)

FABRICATION AND PROPERTIES OF MICROENCAPSULATED PHASE CHANGE MATERIAL CONTAINING PARAFFIN BY USING DIFFERENT TYPES OF SMA AS EMULSIFIER

采用不同相对分子质量的HSMA为乳化剂,通过原位聚合法制备了以石蜡为芯材、三聚氰胺-甲醛树脂(MF树脂)为壁材的相变微胶囊.研究表明,使用高相对分子质量的HSMA为乳化剂制得的微胶囊成球性好,表面光滑,粒径小,分布较窄;使用低相对分子质量的HSMA为乳化剂制得的微胶囊表面粗糙,粒径大,分布较宽;随着HSMA相对分子质量的增加,制得微胶囊的热稳定性提高.

Microencapsulated phase change materials（MicroPCMs） based on paraffin core and melamine-formaldehyde（MF） resin shell are synthesized by in situ polymerization method using different styrene-maleic anhydride（SMA） copolymers as emulsifiers. The morphology investigation suggested that the low molecular weight of HSMA made the globular surface becomes rougher, while a higher molecular weight resulted in a smoother and more compact surface. The particle size distribution showed that with increasing the molecular weight of HSMA, the capsule average diameter decreased and their size distribution became narrower.The thermal stability of microPCMs increases slightly with the increasing of the molecular weight of HSMA emulsion.