文献类型：期刊文献

英文题名：Flexible PEBAX/graphene electromagnetic shielding composite films with a negative pressure effect of resistance for pressure sensors applications

作者：Zhao, Biao Zhang, Xi Deng, Jiushuai Zhang, Chun Li, Yang Guo, Xiaoqin Zhang, Rui

第一作者：Zhao, Biao

通信作者：Zhao, B[1];Zhao, B[2];Deng, JS[2];Deng, JS[3]

机构：[1]Zhengzhou Univ Aeronaut, Henan Key Lab Aeronaut Mat & Applicat Technol, Sch Mat Sci & Engn, Zhengzhou 450046, Henan, Peoples R China;[2]Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Fac Land Resource Engn, Kunming 650093, Yunnan, Peoples R China;[3]China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China;[4]Guizhou Inst Technol, Coll Mat & Met Engn, Guiyang 550003, Peoples R China;[5]Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China

第一机构：Zhengzhou Univ Aeronaut, Henan Key Lab Aeronaut Mat & Applicat Technol, Sch Mat Sci & Engn, Zhengzhou 450046, Henan, Peoples R China

通信机构：corresponding author), Zhengzhou Univ Aeronaut, Henan Key Lab Aeronaut Mat & Applicat Technol, Sch Mat Sci & Engn, Zhengzhou 450046, Henan, Peoples R China;corresponding author), Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Fac Land Resource Engn, Kunming 650093, Yunnan, Peoples R China;corresponding author), China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China.

年份：2020

卷号：10

期号：3

起止页码：1535-1543

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20200408067093);Scopus(收录号：2-s2.0-85077982350);WOS:【SCI-EXPANDED(收录号:WOS:000507296300036)】；

基金：The authors gratefully appreciate the financial support of this work by the National Natural Science Foundation of China (51764022, 51802289 and 51863003), and Key Science and Technology Program of Henan Province (182102210108).

语种：英文

外文关键词：Amides - Blending - Compression molding - Electromagnetic pulse - Electromagnetic shielding - Graphene - Pressure effects - Shielding - Solvents - Stabilization

摘要：In the current work, we fabricated flexible poly(ether-block-amide) (PEBAX)/graphene composite films by a combination of facile melt blending and compression molding technique. The graphene content significantly affects the mechanical properties, electrical conductivity and electromagnetic interference (EMI) shielding performance. An electrically conductive percolation threshold of 1.75 vol% graphene was obtained in the PEBAX/graphene composites. With the introduction of 4.45 vol%, and 8.91 vol% graphene content, the average EMI SE of composite films could reach 16.6 and 30.7 dB, respectively. More interestingly, the PEBAX/graphene composite exhibited a nearly-linear negative pressure coefficient (NPC) effect of resistance with increasing outer pressure stimulation, which was attributed to the formation of more conductive pathways caused by the decreased distance between adjacent graphene. In addition, these composites demonstrated good sensing stability, recoverability and reproducibility after stabilization by cyclic pressure loading. The current study provides guidelines for the large-scale preparation of elastomer NPC sensors and smart EMI shielding devices.