Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite modified epoxy resin coating for improved microwave absorption and impermeability on cement mortar
Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite modified epoxy resin coating for improved microwave absorption and impermeability on cement mortar
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DOI：
10.1016/j.conbuildmat.2021.125213
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发表时间：
2021-10-15
影响因子：
7.4
通讯作者：
Li, Zhihong
中科院分区：
文献类型：
--
作者：
Li, Ying;Guan, Hailong;Li, Zhihong
随着无线电技术的迅速发展，电磁干扰和污染已成为严重危害人类健康的问题。因此，在设备、砂浆等建筑材料表面设计和开发高效的电磁波吸收涂层具有重要意义。本文采用不同添加量的Ni0.6Zn0.4Fe2O4/Ti 3C 2 Tx纳米复合改性环氧树脂，制备了一系列新型水泥砂浆吸波防腐涂层。研究了Ni0.6Zn0.4Fe2O4/Ti 3C 2 Tx纳米复合材料在环氧树脂中的含量对水泥砂浆涂层的力学性能、界面结合能力、腐蚀性能和反射性能的影响。当在环氧树脂中加入3%Ni0.6Zn0.4Fe2O4/Ti 3C 2 Tx纳米复合材料时，改性水泥砂浆的电磁波吸收性能最好，其最小反射率为-34.39dB，低于-10dB的吸收带宽约为8.96GHz。此外，毛细管吸水率和氯离子渗透试验结果表明，与未涂层和纯环氧树脂涂层的水泥砂浆相比，随着Ni 0. 6 Zn 0. 4Fe 2 O 4/Ti 3C 2 Tx纳米复合材料含量的增加，改性环氧树脂涂层水泥砂浆的抗水渗透性和抗氯离子渗透性得到明显改善。特别是，优化的改性环氧树脂与3%的剂量的Ni0.6Zn0.4Fe2O4/Ti 3C 2 Tx纳米复合材料也显示出最低的毛细吸附和氯离子渗透性。研究结果表明，Ni0.6Zn0.4Fe2O4/Ti 3C 2 Tx纳米复合改性环氧树脂作为水泥砂浆涂层，为解决军用和民用领域的电磁污染和抗渗问题提供了一种可行的途径。
With the rapid development of wireless technology, electromagnetic interference and pollution have been a serious harmful problem to human health. Therefore, it is greatly significant to design and explore efficient electromagnetic wave (EMW) absorbing coatings on the surface of devices, mortar or other building materials. In this paper, a series of novel Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite modified epoxy resins with different ad-ditive content were successfully prepared to serve as absorbing and anticorrosive coating on cement mortar. The effect of the content of Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite in epoxy resin as coatings of cement mortar on mechanical properties, interfacial bonding ability, corrosion performances and reflectivity performances was detailly investigated. Apparently, when 3% Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite is added into epoxy resin, the cement mortar with modified coatings exhibits the most excellent EMW absorption properties, whose the minimum reflectivity is -34.39 dB, the absorption bandwidth with reflectivity lower than -10 dB is about 8.96 GHz. Besides, both capillary sorptivity and chloride penetration tests demonstrated that the impermeability of water and chloride ions of cement mortar coated by modified epoxy coatings was obviously improved with the increase of Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite compared to cement mortar without coatings and with pure epoxy resin coating. In particular, the optimized modified epoxy resin with 3% dosage of Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite also displays the lowest capillary sorptivity and chloride permeability. Our findings proved that the use of Ni0.6Zn0.4Fe2O4/Ti3C2Tx nanocomposite modified epoxy resin as coatings of cement mortar provides a viable source for solving electromagnetic pollution and impermeability problems in military and civilian applications.