Mitigating the electromagnetic radiation by coupling use of waste cathode-ray tube glass and graphene oxide on cement composites
Mitigating the electromagnetic radiation by coupling use of waste cathode-ray tube glass and graphene oxide on cement composites
复制标题
通过废阴极射线管玻璃和氧化石墨烯在水泥复合材料上的耦合使用来减轻电磁辐射
DOI：
10.1016/j.compositesb.2018.12.050
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发表时间：
2019-07-01
影响因子：
13.1
通讯作者：
Xing, Feng
中科院分区：
文献类型：
--
作者：
Long, Wu-Jian;Gu, Yu-cun;Xing, Feng
随着科技的发展，越来越多的电子设备对人类环境产生了严重的电磁干扰和辐射。研究了氧化石墨烯(GO)外加剂(高达0.10%水泥)和废弃阴极射线管(CRT)玻璃替代水泥基复合材料中细集料(30%和60%)的电磁干扰(EMI)的耦合效应。利用解耦方法得到的电介电常数用于评估水泥基复合材料的电磁屏蔽能力，而直流电阻则采用四探针法进行测量。当GO含量从30%增加到60%时，样品的直流电阻率随GO含量的增加而增加不明显，但随着CRT玻璃含量的增加而显著增加。在10(4)-5×10(6)HZ和10(1)-10(3)HZ频率范围内，用0.1wt.%GO替代60wt.%的废CRT玻璃，其相对介电常数分别提高约50%和200%。结果表明，由于废CRT玻璃与GO的协同作用，可以显著提高介电常数。水泥基复合材料电磁屏蔽能力的提高不仅使其在减轻电磁污染方面的应用成为可能，而且促进了有毒废旧CRT玻璃的大量回收利用。
With technological development, the rapid growing numbers of electronic devices generate severe electromagnetic interference (EMI) and radiation to human environment. In this study, the coupling effect of graphene oxide (GO) addition (up to 0.10 wt.% of cement) and waste cathode-ray tube (CRT) glass replacement for fine aggregates (30 and 60 wt.%) in cement-based composites on mitigating EMI was studied. The electric permittivity obtained using a decoupling method was applied for evaluating the EMI shielding capacity of cement based composites, while direct current (DC) electrical resistance measurement is conducted using four-probe method. The DC electrical resistivity of specimens increases insignificantly with increasing in GO content, but remarkably with increasing CRT glass content from 30 to 60 wt.%. The 60 wt.% replacement of waste CRT glass with 0.1 wt.% GO addition increases the relative permittivity by about 50% and 200% when the frequency is in the ranges of 10(4)-5 x 10(6) Hzand 10(1)-10(3) Hz, respectively. It is concluded that a significant increase in the permittivity can be obtained owing to the synergetic interaction between waste CRT glass and GO. The improvement in the EMI shielding ability of cement-based composites not only enables the applications of these composites in mitigating electromagnetic pollution, but also promotes large-volume recycling of toxic waste CRT glass.