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针对现有微胶囊相变溶液蓄热量低、传热系数不大、过冷现象严重、受外力冲击微胶囊易受损破裂、相变溶液易分层等诸多不足,考虑采用吸(蓄)热性能高的棕榈酸作为芯材,并用特殊工艺将相变微胶囊制成直径为200~300nm的颗粒,以增加其吸(蓄)热能力。以Pickering乳液为介质溶液,对溶液体系起稳定支撑作用。同时,加入质量分数为1%左右的碳纳米管,用偶联剂将碳纳米管与纳米微胶囊进行有效耦合,以增加其结合力。碳纳米管的导热系数很高,可以极大地提高相变溶液的导热能力,有效增强微胶囊的耐外界冲击性能,延长相变溶液的使用寿命,具有独特的创新意义和现实应用价值。
In view of the problems of low heat storage capacity, small heat transfer coefficient, severe undercooling, easily damaged by external shock microcapsules and easy delamination of phase change solution, the existing microcapsule phase change solution is considered to be heat storage, High-performance palmitic acid as a core material, and a special phase change microcapsules made of particles with a diameter of 200 ~ 300nm, in order to increase its suction (storage) thermal capacity. Pickering emulsion as a solution, the system of the solution from the stable role of support. At the same time, adding carbon nanotubes with a mass fraction of about 1%, coupling the carbon nanotubes and the nanocapsules effectively with a coupling agent to increase their binding force. The high thermal conductivity of carbon nanotubes can greatly improve the thermal conductivity of the phase change solution, effectively enhance the resistance to external impact of the microcapsule and prolong the service life of the phase change solution, and has unique innovative significance and practical application value.