具有强光吸收和超亲水性的层级木质素基静电纺丝碳膜用于海水淡化
A lignin-based carbonized electrospinning membrane with strong light absorption and hierarchical superhydrophilicity for seawater desalination
陈嘉玥 1曹美莲 2岳一莹1
作者信息
- 1. College of Ecology and the Environment,Nanjing Forestry University,Nanjing 210037,China
- 2. School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
- 折叠
摘要
木质素的高价值利用满足了废弃物资源化利用的需求,对实现碳中和具有重要意义.然而,木质素在高温下不稳定,容易熔化和变形,需要较长的稳定时间.通过电纺制备的碳纳米纤维(CNF)膜具有高纵横比、低密度、良好的光吸收和丰富的孔隙结构等优势.本文基于共电纺技术制备了一种以木质素为基础的CNF膜材料.该材料的制备过程不仅能够节省木质素基纳米纤维的稳定时间,还通过氯化锌激活和添加孔隙形成剂(苯二甲酸和聚甲基丙烯酸甲酯)提高了膜的亲水性和光吸收性能.作为界面太阳蒸发系统的光热层,该膜在整个太阳光谱下的光吸收率为94.3％.此外,以制备的CNF膜作为光热层的界面太阳蒸发系统(@1 sun)表现出1.43 kg m-2h-1的蒸发速率,蒸发效率为93.8％.此外,蒸发器具有良好的循环和耐盐性能,在连续照射15 h后仍然保持卓越的蒸发速率.这种以木质素为主要碳源的CNF膜在海水淡化应用中具有巨大的光热转化潜力.
Abstract
The high-value utilization of lignin meets the demand for the reclamation of wastes and is of great sig-nificance for achieving carbon neutrality.However,lignin is unstable and prone to melting and deformation at high tem-peratures,requiring a long period of stabilization.The carbon nanofiber(CNF)membrane prepared by electrospinning has advantages such as high aspect ratio,low density,good light absorption,and a large number of pores favorable for steam transportation.Based on co-electrospinning,a lignin-based CNF membrane material was prepared in this work.The preparation process of this material can not only save the stabilization time of lignin-based nanofibers but also im-proves the hydrophilicity and light absorbance of the mem-brane through zinc chloride activation and the addition of pore-forming agents(terephthalic acid and polymethyl me-thacrylate).As a photothermal layer of an interfacial solar evaporation system,the membrane has a light absorption of 94.3％over the whole sun spectrum.Furthermore,the inter-facial solar evaporation system with the prepared CNF mem-brane as the photothermal layer has an evaporation rate of 1.43 kg m-2 h-1 under one sun,with an evaporation efficiency of 93.8％.In addition,the evaporator has good circulation and salt resistance ability.After 15 h of continuous illumination,it still maintains excellent evaporation rate.This type of CNF membrane with lignin as the main carbon source has great potential as a photothermal conversion material in future desalination applications.
关键词
biomass-derived lignin/electrospinning/carbon nanofibers membrane/photothermal conversion/desalinationKey words
biomass-derived lignin/electrospinning/carbon nanofibers membrane/photothermal conversion/desalination引用本文复制引用
基金项目
国家自然科学基金(31901274)
13th China Special Postdoctoral Science Foundation(2020T130303)
中国博士后科学基金(2019M661854)
Postdoctoral Science Foundation of Jiangsu Province(2019K142)
出版年
2024
NETL
NSTL
万方数据