以三聚氰胺-脲醛树脂(MUF)作为囊壁,以正十八烷为芯材,通过原位聚合法制备了正十八烷@三聚氰胺-脲醛树脂微胶囊相变材料,研究了乳化剂Span80、Tween80、十二烷基硫酸钠对微胶囊相变材料形貌、结构和热性能的影响。结果表明,乳化剂类型和乳化剂添加量对微胶囊相变材料的形貌会造成显著影响,使用非离子乳化剂和阴离子乳化剂复配时,微胶囊相变材料的团聚现象得到改善,粒径分布均匀,储热能力提高。制备的微胶囊相变材料潜热存储效率达到54%时,微胶囊相变材料的熔融焓和结晶焓分别为134.2J/g和109J/g。
The n-octadecane@melamine-urea-formaldehyde resin microencapsulated phase change materials were synthesized using melamine-urea-formaldehyde resin (MUF) as the capsule shell and n-octadecane as the core material through in-situ polymerization approach.The effects of emulsifiers,such as Span80,Tween80,and SDS on the morphology,structure,and thermal properties of the microcapsules,were investigated.The experimental results revealed that the choice of emulsifier type and its concentration significantly influenced the morphology of the microencapsulated phase change materials.In particular,the co-use of nonionic and anionic emulsifiers led to an enhancement in the dispersion of microcapsules,resulting in improved uniformity in particle size distribution and heightened heat storage capacity of the microencapsulated phase change materials.Notably,When the latent heat storage efficiency of the microencapsulated phase change materials reached 54%,the enthalpies of melting and crystallization of the microencapsulated phase change materials were 134.2J/g and 109 J/g,respectively.
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基金资助
国家重点研发计划(2021YFB2601702)
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