涤纶基纳米铜/还原氧化石墨烯复合材料的制备及其电磁屏蔽性能

为制备具有电磁屏蔽性能且质轻、柔软的复合材料,以涤纶织物为基材,采用浸轧法将纳米铜乳液和氧化石墨烯负载到织物中,并通过化学法还原氧化石墨烯,制备涤纶基纳米铜/还原氧化石墨烯复合材料。借助扫描电子显微镜、红外光谱仪、X射线衍射仪等对复合材料进行表征,分析了纳米铜乳液粒径、质量分数及氧化石墨烯质量分数对复合材料电磁屏蔽性能的影响。结果表明:在纳米铜乳液平均粒径为93.7 nm、质量分数为20％,氧化石墨烯质量分数为8％条件下制备的复合材料具有良好的电磁屏蔽性能,其最小反射损耗值为–38.06 dB;与普通涤纶织物相比,复合材料亲水性能提高,手感良好,断裂强力略有降低。

Preparation and electromagnetic shielding properties of polyester fabric based nano-copper/reduced graphene oxide composites

In order to prepare lightweight and flexible materials with electromagnetic shielding properties, nano copper emulsion and graphene oxide were loaded on polyester fabrics by dip-padding, after which the graphene oxide was reduced by a chemical reduction method to achieve polyester fabrics loaded with nano-copper/reduced graphene oxide composite. The materials were characterized by scanning electron microscopy, Fourier transform infrared spectrometer and X-ray diffraction. The effects of particle size of nano-copper emulsion, mass fraction of nano copper emulsion and graphene oxide on electromagnetic shielding properties of the composite materials were studied. The results show that the composite materials have excellent electromagnetic shielding properties with a minimum reflection loss value of –38.06 dB, with the average particle size of nano copper emulsion being 93.7 nm and mass fraction 20％, and mass fraction of the graphene oxide 8％. Compared with untreated polyester fabric, the composite materials have better wettability and handle, but the breaking strength of composite materials reduced slightly.