还原氧化石墨烯/壳聚糖自组装棉织物的制备及性能

Preparation and properties of reduced graphene oxide/chitosan self-assembled cotton fabric

摘要:

为提升纯棉织物的功能性，先以乙二醛和壳聚糖（CS）对纯棉织物进行改性制备CS改性棉织物，然后将CS改性棉织物经氧化石墨烯（GO）分散液浸渍，最后将吸附沉积在织物上的GO还原为还原氧化石墨烯（RGO），制备具有导电、抗紫外线和抑菌性能的RGO/CS-棉织物。基于SEM、FTIR和Raman光谱表征，考察CS质量分数、GO分散液质量浓度对RGO/CS-棉织物的导电、抗紫外线和抑菌性能的影响，并对其耐洗性进行测试。结果表明，RGO/CS-棉织物表面沉积的GO被较充分还原为RGO，表面覆盖了一层连续的RGO/CS薄膜；RGO/CS-棉织物导电性随着GO分散液质量浓度的增加而逐渐增强，主要缘于RGO良好的导电性；经质量分数2%的CS溶液改性和质量浓度5 g/L的GO分散液处理并还原后的RGO/CS-棉织物具有最佳的导电性，表面电阻值为1.02 kΩ/cm；RGO与CS协同增强了RGO/CS-棉织物的抑菌性能，抑菌率最高达95%；经质量分数0.5%的CS溶液改性和质量浓度3 g/L的 GO分散液处理并还原后的RGO/CS-棉织物经过30~50次皂洗洗涤后，导电、抑菌和抗紫外线性能变化较小。

Abstract:

For the purposes of improve the functionality of cotton fabric, cotton fabrics were modified with glyoxal and chitosan (CS) to obtain CS-modified cotton fabrics, then the CS modified cotton fabric was impregnated with graphene oxide (GO) dispersion, and finally the GO adsorbed on the fabric was reduced to reduced graphene oxide (RGO). RGO/CS-cotton fabric with conductive, UV resistant and antibacterial properties was prepared. Based on SEM, FTIR and Raman spectroscopy, the effects of CS mass fraction and GO dispersion mass concentration on the electrical conductivity, UV resistance and antibacterial properties of RGO/CS-cotton fabric were investigated, and the washability of the fabric was tested. The results show that the GO deposited on the surface of RGO/ CS-cotton fabric is fully reduced to RGO, and the surface is covered with a continuous layer of RGO/CS film. The electrical conductivity of RGO/CS-cotton fabric increases gradually with the increase of GO dispersion concentration, mainly due to the good electrical conductivity of RGO. The RGO/CS-cotton fabric modified with 2% CS solution and treated with 5 g/L GO dispersion has the best electrical conductivity, and the surface resistance is 1.02 kΩ/cm. The antibacterial performance of RGO/CS-cotton fabric was enhanced by the collaboration of RGO and CS, and the antibacterial rate was up to 95%. The RGO/CS-cotton fabric modified with 0.5% CS solution and treated with 3 g/L GO dispersion after 30~50 times of soaping has little change in conductivity, bacteriostatic and UV resistance.