还原氧化石墨烯/粘胶多层复合材料的制备及其界面蒸发性能

Fabrication and interfacial evaporation properties of reduced graphene oxide/viscose multi-layer composite

为制备便携、可重复使用和大规模生产的界面蒸发器,基于还原氧化石墨烯(RGO)和不同纺织品制备了RGO/粘胶多层复合材料。其中,RGO/粘胶织物作为太阳能吸收体,棉纱和棉织物作为供水通道,聚丙烯织物作为隔热材料。对RGO/粘胶织物的结构、亲水性能和光学性能进行分析,研究了RGO/粘胶多层复合材料的蒸发性能、循环稳定性及应用性能。结果表明:RGO与粘胶纤维发生了交联反应,水滴可在2.02 s完全渗透在RGO/粘胶织物中,RGO/粘胶织物在紫外-可见近红外光区域的光吸收率在90%左右;在1.0 kW/m^(2)的光照下,隔热层厚度为1.35 cm时,RGO/粘胶多层复合材料的蒸发速率最大,是纯水蒸发速率的3.6倍;此外,RGO/粘胶多层复合材料具有良好的循环稳定性,使用10次后蒸发速率无明显变化,在染料废水处理方面具有良好的应用前景。

In order to prepare interfacial evaporator with portability,reusability and scalable manufacturability,reduced graphene oxide(RGO)/viscose multi-layer composite was fabricated,where the RGO/viscose fabric acts as solar absorber,cotton yarn and cotton fabric are used as water supply channel,and polypropylene fabric functions as thermal heat material.The structure,hydrophilic properties and optical properties of the RGO/viscose fabric were analyzed,and the evaporation properties,cyclic stability and application performance of the RGO/viscose multi-layer composite were studied.The results show that RGO is cross-linked with viscose fibers.The water droplets completely permeate into the RGO/viscose fabric in 2.02 s.The absorbance of RGO/viscose fabric is about 90%in the ultraviolet-visible near infrared region.When the thickness of insulation layer is 1.35 cm,the evaporation rate of the RGO/viscose multi-layer composite is the highest under 1.0 kW/m^(2) solar irradiation,which is 3.6 times as high as that of pure water.Furthermore,the RGO/viscose multi-layer composite has good cyclic stability as the evaporation rate remains constant after recycling 10 times,showing excellent potential application prospect for dye wastewater treatment.