Achieving acceptable electromagnetic interference shielding in UHMWPE/ground tire rubber composites by building a segregated network of hybrid conductive carbon black

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, COMPOSITES

Nanocomposites Pub Date : 2023-09-14 DOI:10.1080/20550324.2023.2251202

Huibin Cheng, Gongxi Zhang, Xuhong Liu, Yukai Lin, Shenglan Ma, Guoliang Lin, Xiaoyi Zhang, Baoquan Huang, Qingrong Qian, Chen Wu

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Abstract

Polymeric composites with the hybrid filler network for high-performance electromagnetic interference (EMI) shielding brought increasing interest. Herein, UHMWPE/ground tire rubber (GTR)/conductive carbon black (CCB) (UGC) composites with a hybrid segregated structural CCB-GTR were constructed by solid-phase shear milling (S3M), mechanical blending, and compacted molding processes. The percolation behavior of electrical conductivity and EMI shielding effectiveness (SE) of composites was described using Sigmoidal/Growth models, and its EMI shielding mechanism was discussed. Results showed that the EMI SE of U30G70C20, U50G50C20, and U70G30C20 composites were found to be 37.5, 41.7, and 43.8 dB, respectively, due to constructing a hybrid network. The attenuation rate of microwave radiation is above 99.99%, and the shielding mechanism is mainly electrical loss. Moreover, the relationship between electrical conductivity and EMI SE is consistent with Sigmoidal/Growth models, indicating that Sigmoidal/Growth models can successfully predict the percolation threshold of the EMI SE of UGC composites.

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通过建立混合导电炭黑的隔离网络，在超高分子量聚乙烯/地面轮胎橡胶复合材料中实现可接受的电磁干扰屏蔽

混合填料网络聚合物复合材料在屏蔽电磁干扰方面的应用日益受到人们的关注。本文通过固相剪切铣磨(S3M)、机械共混和压实成型工艺，构建了具有混合分离结构CCB-GTR的UHMWPE/ground tire rubber (GTR)/导电炭黑(CCB) (UGC)复合材料。利用Sigmoidal/Growth模型描述了复合材料的电导率和电磁干扰屏蔽效能(SE)的渗透行为，并讨论了其屏蔽电磁干扰的机理。结果表明，U30G70C20、U50G50C20和U70G30C20复合材料由于构建了混合网络，其EMI SE分别为37.5、41.7和43.8 dB。微波辐射衰减率在99.99%以上，屏蔽机制主要是电损耗。电导率与EMI SE之间的关系符合Sigmoidal/Growth模型，表明Sigmoidal/Growth模型可以成功预测UGC复合材料EMI SE的渗透阈值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanocomposites Multiple-

CiteScore

7.40

自引率

15.20%

发文量

审稿时长

16 weeks