纤维素纳米纤维/石墨烯基超疏水电磁屏蔽纺织品的制备

Preparation of superhydrophobic and electromagnetic shielding textiles based on cellulose nanofibers/graphene

以氧化石墨烯(GO)与纤维素纳米纤维(CNF)为原料,制备了纤维素纳米纤维/还原氧化石墨烯(CNF@RGO)复合材料,并将其与聚二甲基硅氧烷(PDMS)结合整理到棉织物表面,制备了超疏水电磁屏蔽纺织品。采用扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)等对复合材料及整理织物的表面形貌和结构进行表征。结果表明,基于CNF@RGO复合材料在整理棉织物表面构建了微观粗糙结构,PDMS将CNF@RGO复合材料牢牢包覆在棉纤维表面,同时降低了整理织物的表面能。整理棉织物在频率为8.368 GHz时最小反射损耗为-23.6dB,表面水滴接触角可达153.7°,实现了优异的电磁屏蔽性、防污及自清洁性能。

Cellulose nanofiber/reduced-oxide graphene(CNF@RGO)composites were prepared using graphene oxide(GO)and cellulose nanofiber(CNF).CNF@RGO composites and poly-dimethylsiloxane(PDMS)were used to coat cotton fabrics to prepare superhydrophobic and electromagnetic shielding textiles.The surface morphology and structure of CNF@RGO composites and coated fabrics were characterized by scanning electron microscope(SEM)and fourier-transform infrared spectrometry(FTIR).The results showed that the treated cotton fabric had surface roughness based on the microscopic rough structure of CNF@RGO composites.The CNF@RGO composites were firmly coated on the surface of the coated cotton fiber with the help of PDMS.PDMS reduced surface energy of the treated cotton fabric.The treated cotton fabric showed minimum reflective loss of-23.6 dB at a frequency of 8.368 GHz and water droplet contact angle of 153.7°,achieving excellent electromagnetic shielding,anti-fouling and self-cleaning properties.