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以三聚氰胺-甲醛树脂为胶囊壁材、固液复配石蜡为胶囊芯材,采用原位聚合法制备了用于自内冷溶液除湿的相变材料微胶囊,研究了单一或不同类型乳化剂复配、乳化剂用量对相变材料微胶囊粒径、微观形貌及热性能的影响.结果表明,非离子乳化剂NP-10与阴离子乳化剂SDBS复配所制微胶囊相变潜热较低,非离子乳化剂Span80和Tween80按质量比1:1复配、乳化剂占芯材质量的60%、乳化转速为1000 r/min时,所制微胶囊综合性能最佳,表面光滑致密,分散性良好,粒径均一,平均粒径为0.45μm,相变潜热为52.48 J/g,囊芯含量为58.44%,相变温度适用于以Li Cl溶液为除湿剂的自内冷溶液除湿系统.
Using melamine-formaldehyde resin as the wall material of the capsule and solid-liquid paraffin as the core material of the capsule, a phase change material microcapsule for dehumidification from the internal cooling solution was prepared by the in-situ polymerization method. The effects of single or different types of emulsifier complex The results showed that the phase transition latent heat of microcapsules prepared by nonionic emulsifier NP-10 and anionic emulsifier SDBS was low, The nonionic emulsifier Span80 and Tween80 are compounded in mass ratio of 1: 1, the emulsifier accounts for 60% of the core mass, and the emulsifying speed is 1000 r / min, the microcapsules with the best comprehensive performance, smooth and dense surface, The average particle diameter was 0.45μm, the latent heat of phase transformation was 52.48 J / g and the content of the core was 58.44%. The phase transition temperature was suitable for the self - cooling solution dehumidification system with LiCl solution as desiccant.