基于响应面法的PLA/石墨烯/SiC复合线材挤出参数优化  

Optimization of Extrusion Parameters of PLA/Graphene/SiC Composite Wire Based on Response Surface Methodology

作　　者：黄才华 张磊[1] 吴海华 黄陈 钱鹏[1] HUANG Cai-hua;ZHANG Lei;WU Hai-hua;HUANG Chen;QIAN Peng(College of Mechanical and Power Engineering,China Three Gorges University,Yichang 443002,China;Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equipment,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学机械与动力学院,湖北宜昌443002 [2]三峡大学石墨增材制造技术与装备湖北省工程研究中心,湖北宜昌443002

出　　处：《塑料科技》2022年第3期84-89,共6页Plastics Science and Technology

摘　　要：利用单螺杆挤出机制备PLA/石墨烯/SiC复合线材,并基于响应面法对比模口温度、主轴转速以及石墨烯含量对复合线材导电性能的影响,通过分析微观形貌及石墨烯/SiC在PLA基体中分布状态,揭示其内部三维导电网络形成机理。结果表明:复合线材中石墨烯含量、模口温度和主轴转速对PLA/石墨烯/SiC复合线材电导率的影响极显著。模口温度为125℃、石墨烯含量为7%时,复合线材内部形成较好的三维网络结构。优化的试验方案为:石墨烯含量7.72%、模口温度125.77℃、主轴转速14.89 r/min。通过实验证明结果可靠。PLA/graphene/SiC composite wire was prepared by a single-screw extruder, and the effects of die temperature,spindle speed and graphene content on the electrical conductivity of the composite wire were comparatively studied based on the response surface method. By analysis the microscopic morphology and the distribution state of graphene/SiC in PLA, the formation mechanism of its internal three-dimensional conductive network was revealed. The results show that the influence of graphene content, die temperature and spindle speed on the electrical conductivity of PLA/graphene/SiC composite wire is very significant. SEM analysis show that when the die temperature is 125 ℃ and the graphene content is 7%, a good three-dimensional network structure is formed inside the composite wire. The optimized experimental scheme is as follows: the graphene content is 7.72%, the die temperature is 125.77 ℃, and the spindle speed is 14.89 r/min. The results are proved to be reliable by experiments.

关 键 词：PLA/石墨烯/SiC复合线材 响应面法 参数优化 电导率 导电网络 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]