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用Pt细丝代替已有3ω方法中的薄膜热线,并设计了基于Labview程序的虚拟测量系统,准确、方便地测量了聚丙烯复合材料的热导率.测量结果发现,多壁碳纳米管/丁苯橡胶/聚丙烯三元复合材料的热导率随着多壁碳纳米管/丁苯橡胶粉末含量的增加变化不大;多壁碳纳米管/聚丙烯复合材料的热导率随着多壁碳纳米管含量增加而增大;复合材料热导率远小于简单混合规则预测的结果,而与有效介质理论符合很好.
The thin film hot wire of 3ω method was replaced by Pt filament, and a virtual measuring system based on Labview program was designed to measure the thermal conductivity of polypropylene composite accurately and conveniently.It was found that the multi-walled carbon nanotube / The thermal conductivity of styrene-butadiene rubber / polypropylene ternary composites has little change with the increase of multi-walled carbon nanotubes / styrene butadiene rubber powder content; the thermal conductivity of multi-walled carbon nanotubes / polypropylene composites increases with increasing The content of wall carbon nanotubes increases, and the thermal conductivity of the composite is far less than that predicted by simple mixing rules, which is in good agreement with the effective medium theory.