碳填料/天然橡胶复合材料热导率及层间接触热阻对微波加热效果的影响

摘要：制备炭黑/天然橡胶（NR）、石墨烯/NR和碳纳米管/NR复合材料，采用试验与数值模拟相结合的方法研究复合材料热导率和层间接触热阻对微波加热的影响。结果表明：炭黑、石墨烯和碳纳米管自身热导率越大，复合材料的热导率越大，层间接触热阻越小；通过增大填料用量来增大复合材料的热导率和减小层间接触热阻具有一定的局限性，需考虑复合材料的配方设计适用性和经济性；复合材料的热导率对微波加热过程中高、低温区域分布规律和微波加热效率基本无影响，但影响复合材料的温度分布均匀性。为保证微波加热硫化均匀性，多层复合材料的层间接触热阻不可忽略。

Influence of Thermal Conductivities and Interlayer Contact Thermal Resistances of Carbon Filler/NR Composites on Microwave Heating Effect

Abstract：Carbon black/natural rubber（NR），graphene/NR and carbon nanotubes/NR composites were prepared，and the effects of the thermal conductivities and interlayer contact resistances of the composites on microwave heating were studied by combining experimental and numerical simulation methods.The results show that the higher the thermal conductivities of carbon black，graphene and carbon nanotubes were，the higher the thermal conductivities of the composites were，and the lower the interlayer contact thermal resistances were.Increasing the filler amounts to increase the thermal conductivities of the composites and reduce the interlayer contact thermal resistances had certain limitations，and the applicability and economy of the composite formulation design needed to be considered.The thermal conductivities of the composites had little effects on the distribution patterns of high and low temperature regions and microwave heating efficiencies during microwave heating process，however，the temperature distribution uniformities of the composites were significantly affected by the thermal conductivities.In order to ensure the uniformities of microwave heating vulcanization，the interlayer contact resistances of multilayer composites could not ignored.