Multi-layer graphene-engineered cementitious composites with multifunctionality/intelligence
Multi-layer graphene-engineered cementitious composites with multifunctionality/intelligence
复制标题
具有多功能/智能的多层石墨烯工程水泥基复合材料
DOI：
10.1016/j.compositesb.2017.07.063
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发表时间：
2017-11-05
影响因子：
13.1
通讯作者：
Ou, Jinping
中科院分区：
文献类型：
--
作者：
Sun, Shengwei;Ding, Siqi;Ou, Jinping
研究了不同含量多层石墨烯（MLGs）填充水泥基复合材料的力学性能、电学性能、压阻效应、热阻效应和电磁性能。结果表明，MLGs填充水泥基复合材料的抗压强度和弹性模量分别提高了54%和50%。MLGs填充水泥基复合材料的电阻率逾渗阈值接近2vol%。MLG填充水泥基复合材料具有敏感的压阻效应，对循环准静态和动态加载具有稳定的响应性。利用电化学阻抗谱和等效电路分析了MLGs填充水泥基复合材料的导电机理。随着MLG掺量的增加，MLG填充水泥基复合材料的热阻效应敏感性呈下降趋势。掺MLGs水泥基复合材料的最佳屏蔽效能是未掺MLGs水泥基复合材料的1.6倍。掺MLG水泥基复合材料的最高吸波性能为-33 dB，是未掺MLG水泥基复合材料的近7倍。(C)2017爱思唯尔有限公司版权所有
This paper is aimed at studying mechanical property, electrical property, piezoresistive effect, thermal resistance effect and electromagnetic property of the cementitious composites filled with different content of multi-layer graphenes (MLGs). Results demonstrated that the compressive strength and elastic modulus of cementitious composites filled with MLGs increased 54% and 50%, respectively. The percolation threshold of electrical resistivity of cementitious composites filled with MLGs is nearly 2 vol %. Cementitious composites filled with MLGs possess sensitive piezoresistive effect and stable responsibility to cyclic quasi static and dynamic loading conditions. The electrochemical impedance spectroscopy and equivalent circuit were used to analyze the conductive mechanism of the cementitious composites filled with MLGs. The sensitivity of thermal-resistance effect of the cementitious composites filled with MLGs presents a decreasing trend with the increase of MLG content. The best shielding effectiveness of cementitious composites filled with MLGs is 1.6 times of that of cementitious composites without MLGs. The highest electromagnetic wave absorbing performance of cementitious composites filled with MLGs is -33 dB, which is nearly 7 times of that of cementitious composites without MLGs. (C) 2017 Elsevier Ltd. All rights reserved.