隔离结构聚乙烯/石墨碳纳米管复合材料性能研究

doi:10.19491/j.issn.1001-9278.2019.10.004

中国塑料 ›› 2019, Vol. 33 ›› Issue (10): 17-22.DOI: 10.19491/j.issn.1001-9278.2019.10.004

隔离结构聚乙烯/石墨碳纳米管复合材料性能研究

易新^1,2,周华龙^1,2,张永^1,2,姜新³,鄢定祥³

1. 上海金发科技发展有限公司上海工程塑料功能化工程技术研究中心 2. 江苏金发科技新材料有限公司江苏省高分子合金材料工程技术研究中心 3. 四川大学高分子科学与工程学院

收稿日期:2019-05-27 修回日期:2019-09-02 出版日期:2019-10-26 发布日期:2019-10-25

Fabrication of Segregated Polyethylene/Graphite-Carbon Nanotubes Composite for Electromagnetic Interference Shielding

YI Xin^1,2;ZHOU Hualong^1,2;ZHANG Yong^1,2;JIANG Xing³;YAN Dingxiang³

1.Shanghai Kingfa SCI & TECH DVPT Co,Ltd,Shanghai Engineering Research Center of Functionalizing Engineering Plastics，Shanghai 201714，China; 2. Jiangsu Polymer Alloy Materials Engineering and Technology Research Center，Jiangsu Kingfa SCI&TECH Advanced Materialls Co，Ltd,Kunshan 215300,China; 3. College of Polymer Science and Engineering，Sichuan University,Chengdu 610065,China

Received:2019-05-27 Revised:2019-09-02 Online:2019-10-26 Published:2019-10-25

摘要/Abstract

摘要： 通过溶液、机械混合和热压成型法制备了具有隔离结构的高密度聚乙烯（PE-HD）/超高相对分子质量聚乙烯（PE-UHMW）/石墨（G）碳纳米管（CNT）复合材料，其中G和CNT随机分布于PE-HD内部形成导电相，该导电相分布于PE-UHMW微区界面形成隔离导电网络。结果表明，该复合材料呈现良好的导电性能，可获得较低的导电逾渗值，当G/CNT为1∶3时，复合材料导电逾渗值仅为0.23 %（体积分数）；同时复合材料保持良好的力学性能，当G-CNT总含量为4 %（质量分数，下同）时（G与CNT质量比为1∶3），复合材料电导率高达0.92 S/m，拉伸强度、弹性模量和断裂伸长率分别为27.1、758.5 MPa和138.7 %；此外，通过调控低成本G与高导电的CNT使用配比实现电性能和力学性能调控，对工业化生产具有重要指导意义。

关键词: 隔离结构, 石墨, 碳纳米管, 超高相对分子质量聚乙烯, 高密度聚乙烯

Abstract: A series of polyethylene (PE-HD)/ultrahigh-molecular-weight polyethylene (PE-UHMW)/graphite-carbon nanotubes (G-CNTs) composite materials with a segregated structure were fabricated by means of a solution-mechanical mixing and hot-compression method. In such a segregated structure, the G-CNTs hybrid was distributed in the PE-HD matrix to form a conductive PE-HD/G-CNT layer, which could be selectively localized on the boundary of PE-UHMW granules. The resultant composite exhibited excellent electrical and mechanical properties. The segregated structure endowed the composite with a very low percolation threshold of 0.23 vol % at the graphite/CNTs weight ratio=1/3. The composite containing only 4 wt % of filler achieved an electrical conductivity of 0.92 S/m, and its tensile strength, Young's modulus, and elongation at break reached 27.1 MPa, 758.5 MPa and 138.7 %, respectively. Additionally, the electrical and mechanical performance of the composites could be controlled by adjusting the weight ratio of low-cost graphite and highly conductive CNTs. This is of greatly significant for the practical applications.

Key words: segregated structure, graphite, carbon nanotube, ultrahigh molecular weight polyethy lene, high density polyethylene

中图分类号:

易新, 周华龙, 张永, 姜新, 鄢定祥. 隔离结构聚乙烯/石墨碳纳米管复合材料性能研究[J]. 中国塑料, 2019, 33(10): 17-22.

YI Xin, ZHOU Hualong, ZHANG Yong, JIANG Xing, YAN Dingxiang. Fabrication of Segregated Polyethylene/Graphite-Carbon Nanotubes Composite for Electromagnetic Interference Shielding[J]. China Plastics, 2019, 33(10): 17-22.

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隔离结构聚乙烯/石墨碳纳米管复合材料性能研究

Fabrication of Segregated Polyethylene/Graphite-Carbon Nanotubes Composite for Electromagnetic Interference Shielding

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