Synthesis and microwave absorption studies on 2D graphitic carbon nitride loaded polyaniline/polyvinyl alcohol nanocomposites

IF 1.8 4区化学 Q3 POLYMER SCIENCE

High Performance Polymers Pub Date : 2022-10-19 DOI:10.1177/09540083221134955

N. Kavitha, A. Chandramohan, Devansh Sharma, K. Dinakaran

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引用次数: 8

Abstract

A light weight electromagnetic interference (EMI) shielding and microwave absorbing composite films has been developed by loading varying weight content of graphitic carbon nitride (g-C3N4) nanosheets and polyaniline (PANI) into polyvinyl alcohol (PVA) matrix. The prepared PVA/PANI/g-C3N4 (1%, 3%, 5%) composites has been subjected to FTIR, X-Ray powder diffraction, SEM, Thermal studies, Dielectric studies and electromagnetic shielding effectiveness (EMI SE) analysis. The PVA/PANI/g-C3N4 (1%, 3%, 5%) composites was discovered to have improved electrical conductivity, dielectric loss, and dielectric constant. It is observed from the SEM images that the sheet layers of g-C3N4 are wrapped by the polymer matrix and the morphology to PVA/PANI composite in the g-C3N4 indicates homogeneous blending of PVA/PANI without any phase separation and has porous in it. The PANI/g-C3N4 fractured surfaces present are smooth but irregular in appearance indicating good compatibility between the PVA and PANI matrices. The dielectric properties was found to increase on increasing the concentration of the g-C3N4 nanofiller and reached a maximum of 9.8 × 106 at 1 MHz for 3% g-C3N4 in PVA/PANI. The incorporation of g-C3N4 into PVA/PANI enhanced the conductivity and the 5% g-C3N4 loaded composite film exhibited a conductivity value of 0.043 S/cm at 1 MHz. The PVA/PANI/g-C3N4 (1%, 3%, 5%) composites exhibited potential EMI SE values ranging from 24 to 35 dB at 8.6 GHz and from 42 to 63 dB at 12.4 GHz, for instance the PVA/PANI/g-C3N4 5% composite showed highest value of 63 dB at 12.4 GHz. The PVA/PANI/g-C3N4 5% exhibits the maximum highest reflection loss 8 GHz–12 GHz in which the higher absorption of −36 dB is observed at 10.3 GHz of the X-band region.

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二维石墨氮化碳负载聚苯胺/聚乙烯醇纳米复合材料的合成及微波吸收研究

通过在聚乙烯醇(PVA)基体中负载不同重量含量的石墨氮化碳(g-C3N4)纳米片和聚苯胺(PANI)，制备了一种轻型电磁干扰(EMI)屏蔽和微波吸收复合薄膜。对制备的PVA/PANI/g-C3N4(1%， 3%， 5%)复合材料进行了FTIR、x射线粉末衍射、SEM、热性能、介电性能和电磁屏蔽性能(EMI SE)分析。发现PVA/PANI/g-C3N4(1%、3%、5%)复合材料的电导率、介电损耗和介电常数均有改善。SEM图像显示，g-C3N4的片层被聚合物基体包裹，其形貌为PVA/PANI复合材料，PVA/PANI共混均匀，无相分离，且具有多孔性。PANI/g-C3N4断裂表面光滑但不规则，表明PVA和PANI基质之间具有良好的相容性。随着g-C3N4纳米填料浓度的增加，其介电性能有所提高，在PVA/PANI中，当g-C3N4浓度为3%时，介电性能在1 MHz时达到最大值9.8 × 106。在PVA/PANI中加入g-C3N4增强了复合膜的电导率，负载5% g-C3N4的复合膜在1 MHz下的电导率值为0.043 S/cm。PVA/PANI/g-C3N4(1%、3%、5%)复合材料在8.6 GHz和12.4 GHz时的潜在EMI SE值分别为24 ~ 35 dB和42 ~ 63 dB，其中PVA/PANI/g-C3N4 5%复合材料在12.4 GHz时的最高SE值为63 dB。PVA/PANI/g-C3N4 5%的最大反射损耗为8 GHz ~ 12 GHz，其中在x波段10.3 GHz处的吸收较高，为−36 dB。

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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.