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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0.1~1μm,储热能力明显提高,相变潜热达到70.86J/g。
A series of microcapsules with n-octadecane (OD) as core material and melamine (M) -formaldehyde resin (F) as wall material were prepared by in-situ polymerization by changing the combination of nonionic / anionic emulsifier The effects of emulsifier complex on the microstructure and latent heat of MF @ OD microcapsule phase change material were investigated systematically by means of FTIR, SEM, DSC and laser particle size analyzer. The results show that different emulsifier combinations and dosages have a significant effect on the morphology and properties of MF @ OD microcapsule phase change materials. When nonionic and anionic emulsifiers are used, MF @ OD microcapsule phase change material agglomeration phenomenon The particle size distribution is more uniform and the particle size is further refined. The size range of particle size is 0.1 ~ 1μm, the heat storage capacity is obviously improved, and the latent heat of phase transformation reaches 70.86J / g.