摘要
以尼龙6(PA6)、碳酸钙(CaCO3)和石墨烯微片(GNPs)为主要原料,通过熔融共混法制备了不同GNPs含量的PA6/CaCO3/GNPs复合材料,采用激光导热仪、旋转流变仪和场发射扫描电子显微镜等仪器研究了复合材料的导热性能、流变性能、微观形貌、力学性能和导电性能。结果表明,当GNPs含量为9~12份时,复合材料出现导热逾渗现象;当GNPs含量为15份时,复合材料热导率达到1.21 W/(m·K),比纯PA6提高了426.1%。加入GNPs能够提高复合材料的储能模量和复数黏度,使熔体弹性响应增强,黏性耗散减小;当GNPs含量为12份时,Han曲线表明熔体由“类液”向“类固”发生转变,复合材料内部形成三维网络结构。加入CaCO3能够提高复合材料的拉伸强度和缺口冲击强度;再加入GNPs后,复合材料的拉伸强度和缺口冲击强度均出现不同程度降低。另外,实验范围内复合材料均保持着较好的电绝缘性。
Polyamide 6(PA6),calcium carbonate(CaCO3)and graphene nanoplatelets(GNPs)were used as main materials to prepare PA6/CaCO3/GNPs composites with different contents of GNPs by melt blending.The thermal conductivity,rheological properties,micromorphology,mechanical properties and electrical conductivity of the composites were investigated by laser thermal conductivity meter,rotational rheometer,field emission scanning electron microscope and so on.The results show that the thermal conduction percolation phenomenon occurs when the content of GNPs is in the range of 9–12 phr.When the content of GNPs is 15 phr,the composite reaches the thermal conductivity of 1.21 W/(m·K),which is 426.1%higher than that of the pure PA6.The storage modulus,complex viscosity and elasticity of the composites are improved by adding GNPs,while the viscous dissipation is decreased.When the content of GNPs is 12 phr,Han curves show that the melt changes from“liquid like”to“solid like”,meaning a three-dimensional network structure is formed inside the composite.The tensile strength and notched impact strength of the composites are increased with the addition of CaCO3.After adding GNPs,the tensile strength and notched impact strength of composites are decreased in different degree.In addition,the composites maintain good electrical insulation properties in the test range.
作者
林少芬
林鸿裕
黄卫明
陈国华
Lin Shaofen;Lin Hongyu;Huang Weiming;Chen Guohua(College of Materials and Chemical Engineering,Liming Vocational University,Quanzhou 362000,China;Xiamen Knano Graphene Technology Co.,Ltd.,Xiamen 361027,China;College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第9期1-6,12,共7页
Engineering Plastics Application
基金
福建省教育厅项目(JZ180905)。
关键词
尼龙6
碳酸钙
石墨烯微片
导热性能
polyamide 6
CaCO3
graphene nanoplatelets
thermal conductivity
作者简介
通讯作者:林少芬,助教,主要从事聚合物共混改性研究,.E-mail:1037414294@qq.com。
