基于聚偏氟乙烯/石墨的换热板片材料的制备及导热性能研究  

Preparation and Thermal Conduction Performance of Poly(vinylidene fluoride)/Graphite Composites as Heat-exchanger Sheet Materials

作　　者：张颖 马玉录 谢林生 ZHANG Ying;MA Yulu;XIE Linsheng(Engineering Center of Efficient Green Process Equipment and Energy Conservation,Ministry of Education,Shanghai 200237,China;School of Mechamcal and Dynamic Engineenny,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院绿色高效过程装备与节能教育部工程研究中心,上海200237

出　　处：《中国塑料》2018年第9期25-31,共7页China Plastics

基　　金：国家自然科学基金(51273065)

摘　　要：以聚偏氟乙烯(PVDF)为基体,石墨为填料,使用溶液共混法制备导热复合材料,研究了石墨填充量、混炼工艺等对复合材料导热性能的影响。结果表明,石墨填充量超过40%(质量分数,下同)后,复合材料的热导率呈明显增大的趋势;当石墨填充量达到70%时,PVDF/石墨复合材料的热导率达到20.92 W/(m·K),是纯PVDF热导率的110倍;270μm:106μm石墨含量比为1∶9时,热导率达到最大值;采用叠片式转子比腰鼓形转子可以制备出更高热导率的复合材料;转子转速和混炼时间对复合材料的热导率影响不大;设计并制备了板式换热器换热板片,实验验证了基于PVDF/石墨复合材料加工生产换热板片的可行性。Poly(vinylidene fluoride)(PVDF)/graphite composites were prepared by a solution-blending method,and the effects of graphite content and compounding process on the thermal conductivity of composites were studied.The results indicated that there was a clear increase trend observed in thermal conductivity of the composites with the graphite content increasing over 40 wt%.The thermal conductivity of composite reached 20.92 W/(m·K)when 70 wt%of graphite was added,which is 110 times as much as that of pure PVDF.The thermal conductivity reached a maximum value at the graphite weight ratio of 1∶9 with the particle sizes of 270 and 106μm,respectively.The higher thermal conductivity could also be achieved for the composites by using laminated rotor than by using drum-shaped rotor.Moreover,the thermal conductivity was slightly affected by rotor speed and mixing time.The plate heat exchanger plate based on the PVDF/graphite composite was designed and prepared to verify the feasibility of experimental production.

关 键 词：聚偏氟乙烯 石墨 热导率 溶液共混法 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]