摘要
以石墨烯(GNPs)为填料对聚丙烯(PP)进行改性,通过球磨和熔融挤出共混的方法制备了一系列不同GNPs含量的GNPs/PP复合材料。用X射线衍射、扫描电子显微镜、电导率测试及拉伸测试等手段对复合材料的结构和性能进行表征分析,研究GNPs含量对复合材料性能的影响。结果表明:随着GNPs含量的增加,复合材料的电导率逐渐增大;当GNPs质量分数为15%时,复合材料的电导率达到0.127S/cm;复合材料的电阻逾渗阈值在GNPs质量分数为5%~8%之间。在力学性能方面,随着GNPs含量的增加,复合材料的拉伸强度呈现出先增加后降低的趋势;当GNPs质量分数为3%时,复合材料的拉伸强度达到最大,为35.658MPa,比纯PP提高了21.04%;复合材料的弹性模量随着GNPs含量的增加而增加,在GNPs质量分数为15%时,复合材料的弹性模量比纯PP提高了89.6%,达到2068.54MPa。本文对制备高导电和高强度的导电聚合物或者导电纤维母粒可以提供一定的参考价值。
A series of graphene nanoplates(GNPs )/polypropylene composites were prepared by ball milling together with melt extrusion blending.X-ray diffraction analysis,scanning electron microscopy,conductivity test and tensile test were used to characterize the microstructure,conductivity and mechanical properties of the composite materials with different amounts of graphene.The results show that the conductivity of composites gradually increases with the increase of graphene concentration.The conduction threshold of composites is between 5% and 8%,and the conductivity of composites reaches 0.127 S/cm when the graphene concentration is 15%.With the increase of graphene concentration,the tensile strength of GNPs/PP composites increases firstly and then decreases.The tensile strength of composites with 3% graphene reaches the highest value of 35.658 MPa.Compared with pure PP,the tensile strength is increased by 21.04%.The elastic modulus of the composite increases with the increase of graphene content.The elastic modulus of the composite with 15% graphene reaches 2 068.54 MPa,which was 89.6%higher than that of PP.The conclusions of this paper can provide some reference value when preparing highly conductive and high-strength conductive polymers or conductive fiber masterbatches.
作者
邹勃
彭倚天
廖壑
甘学辉
ZOU Bo;PENG Yi-tian;LIAO He;GAN Xue-hui(College of Mechanical Engineering,Donghua University,Shanghai 201620,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2019年第6期45-48,73,共5页
China Plastics Industry
关键词
聚丙烯
石墨烯
电学性能
力学性能
Polypropylene
Graphene
Electrical Properties
Mechanical Properties
