MXene/CNF/SA双层光热转化材料的制备及其应用性能研究

Study on preparation and application properties of MXene/CNF/SA bilayer photothermal conversion materials

太阳能驱动海水淡化被认为是一项可有效解决淡水资源短缺的技术,但该技术中应用的多数光热转化材料采用组合结构,并且材料难以实现自漂浮,需使用石油基泡沫材料作为载体层,因此,为制备一种环保、可实现自漂浮的光热转化材料,以MXene(Ti_(3)C_(2)T_(x))为光吸收材料,可生物降解的纤维素纳米纤丝(CNF)和海藻酸钠(SA)为骨架材料,制备MXene/CNF/SA双层光热转化材料(M-CSA).主要研究了M-CSA双层光热转化材料的结构及性能.结果表明,当添加0.30 wt.%MXene时,在一个太阳光强度下,M-CSA双层光热转化材料的太阳能总吸收率可达95.87%,水蒸发速率为0.93 kg·m^(-2)·h^(-1).

Solar-powered desalination is considered to be a technology can resolve the shortage of fresh water resources effectively.However,most of the photothermal conversion materials used in this technology adopt a combined structure,and the material is difficult to realize the floating,which need to use oil-based foam as a carrier of the foundation.Therefore,using MXene(Ti_(3)C_(2)T_(x))for light absorption material,biodegradable nanocellulose(CNF)and sodium alginate(SA)as skeleton materials prepared a kind of environmental and can realize the floating MXene/CNF/SA bilayer photothermal conversion material(M-CSA).The structure and properties of M-CSA bilayer photothermal conversion materials were studied.The results showed that when 0.30 wt.%MXene is added,the solar absorptivity of M-CSA bilayer photothermal conversion material could reach 95.87%,and the evaporation rate could reach 0.93 kg·m^(-2)·h^(-1)under one sun illumination.