A study on development of silicone rubber with conductive carbon, polyaniline, MWCNT composite for EMI shielding

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2023-01-13 DOI:10.1177/09540083221151013

J. Jayakanth, K. Chennakesavulu, G. Ramanjaneya Reddy, S. Dhanalakshmi, V. Priya, K. Sasikumar, T. Sasipraba

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Abstract

The multiwall carbon nanotubes (MWCNTs) were grown by CVD method and using Ni impregnated zeolite as a substrate. The prepared MWCNT diameter varied from 10 to 60 nm and length in few microns. The silicone rubber (SR) was mixed well with conductive carbon, Polyaniline (PANI) and MWCNTs in two roll mill. The prepared silicone rubber materials were fabricated in the form of sheets with dimensions of 200 mm × 200 mm × 2 mm by using compression molding technique. The prepared sheets were subjected for EMI shielding efficiency measurements at low frequency (< 1.5 GHz) and high frequency range from 1 GHz to 18 GHz. At high frequency the shielding effectiveness of the Conducting Silicone Rubber and Conductive silicone rubber with MWCNT was found to be 24 dB and 48 dB. The volume resistivity measurements were also carried for all the prepared silicone rubber sheets, the results reveals that SR + MWCNT, CSR + MWCNT composites shows volume resistivity 4032 and 20.7 Ω.cm respectively. This confirms the conductivity of CSR + MWCNT is enough to exhibit good Shielding Effectiveness. Graphical Abstract

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导电碳、聚苯胺、MWCNT复合硅橡胶屏蔽电磁干扰的研究

采用化学气相沉积法，以镍浸渍沸石为基体，生长了多壁碳纳米管。制备的MWCNT直径在10至60nm之间变化，长度在几微米内。将硅橡胶（SR）与导电碳、聚苯胺（PANI）和MWCNTs在两辊轧机中充分混合。采用压缩成型技术将制备的硅橡胶材料制备成尺寸为200mm×200mm×2mm的片材。制备的片材在低频（<1.5GHz）和1GHz至18GHz的高频范围内进行EMI屏蔽效率测量。在高频下，导电硅橡胶和具有MWCNT的导电硅橡胶的屏蔽效果分别为24dB和48dB。对所有制备的硅橡胶片进行了体积电阻率测量，结果表明，SR+MWCNT、CSR+MWCNTs复合材料的体积电阻率分别为4032和20.7Ω.cm。这证实了CSR+MWCNT的导电性足以表现出良好的屏蔽效果。图形摘要

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来源期刊

High Performance Polymers 化学-高分子科学

CiteScore

4.20

自引率

14.30%

发文量

106

审稿时长

1.2 months

期刊介绍： Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.