聚吡咯修饰的羧甲基纤维素/磺化共轭微孔聚合物复合气凝胶光热转换净水性能研究

Preparation of polypyrrole modified carboxymethyl cellulose/sulfonated conjugated microporous polymer composite aerogel and its photothermal conversion water purification properties

淡水资源作为生命赖以生存的物质基础面临严重挑战,利用高效的太阳能驱动界面蒸发(SSG)是解决目前水资源短缺的重要手段,一种新型的多孔材料共轭微孔聚合物(CMPs)在水处理技术中具有重要作用。以CMC/SCMP为前躯体在其表面喷涂聚吡咯制备了一种新型太阳能蒸发器(CMC/SCMP-PPy),喷涂聚吡咯增强了光吸收性能,光吸收率可达91%,实现了光热转化能力。该气凝胶在1 kW/m^(2)太阳条件下表现出良好的光热转换性能,蒸发效率可达85.57%。多孔结构和亲水特性使其具有优异的水传输能力,稳定的化结构使其具有优异的耐盐性以防止盐晶体沉积堵塞材料孔道,使其实现了光热转化能力。这项研究进一步优化了CMPs在废水的净化,实现了清洁能源的利用,为开发新型光热材料提供了新的思路。

As the material basis for the survival of life,fresh water resources are facing serious challenges.Using efficient solar-driven interface evaporation(SSG)is an important means to solve the current water shortage.A new porous material conjugated microporous polymer(CMPs)plays an important role in water treatment technology.A new type of solar energy evaporator(CMC/SCMP-PPY)was prepared by spraying polypyrrole on its surface with CMC/SCMP as a precursor.The light absorption rate was up to 91%and the photothermal conversion ability was realized.The aerogel showed good photothermal conversion performance under 1 kW/m^(2)irradiation,and the evaporation efficiency reached 85.57%.The porous structure and hydrophilic characteristics make it have excellent water transport ability,and the stable chemical structure makes it have excellent salt resistance to prevent salt crystal deposition and clogging material channels,so that it can realize the photothermal conversion ability.This work further optimizes the purification of CMPs in wastewater,realizes the utilization of clean energy,and provides a new idea for the development of new photothermal materials.