采用原位聚合法,通过改变非离子/阴离子乳化剂组合制备了一系列以正十八烷(OD)为芯材、三聚氰胺(M)-甲醛树脂(F)为壁材的微胶囊相变储能材料,并借助FTIR、SEM、DSC和激光粒度分析仪等手段系统研究了乳化剂复配对M-F@OD微胶囊相变材料微观形貌和相变潜热的影响.结果表明,不同乳化剂组合及掺量对M-F@OD微胶囊相变材料的形貌和性能产生显著影响,当采用非离子和阴离子复合乳化剂时,M-F@OD微胶囊相变材料团聚现象得到明显改善,粒径分布更加均匀,颗粒尺寸进一步细化,粒径大小范围为0.1~1 μm,储热能力明显提高,相变潜热达到70.86 J/g.
Melamine(M)-formaldehyde(F)@n-octadecane(OD) micro-encapsulated phase change composites with OD core and M-F polymer shell were synthesized by nonionic/anionic composite emulsifier via in-situ polymerization.The chemical structure, particle size distribution, micro-morphology and thermal properties of the M-F@OD micro-encapsulated phase change composites were characterized by FTIR, SEM, DSC and laser particle analyzer.The results show that the combination and dosage of different emulsifier produce a significant impact on the morphology and properties of the M-F@OD micro-encapsulated phase change composites.As the anionic/nonionic composite emulsifier is used, the phenomenon of agglomeration of the M-F@OD phase change composites is improved, the particle size distribution of the M-F@OD phase change composites is more uniform, the particle size is further refined which is 0.1-1 μm, providing a high energy storage capacity of 70.86 J/g.
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