聚吡咯/纸浆纤维复合光热纸的制备及其太阳能驱动界面水蒸发研究

Study on Preparation of Polypyrrole/Pulp Fiber Composite Photothermal Paper and Its Solar-driven Interfacial Water Evaporation

关键词:  光热纸  聚吡咯  太阳能  界面水蒸发

Key Words:photothermal paper  polypyrrole  solar energy  interface water evaporation

摘要:本研究以未漂硫酸盐针叶木浆为原料，采用原位聚合法制备具有良好亲水性、高能量转换效率的聚吡咯/纸浆纤维复合光热纸，并应用于太阳能驱动界面水蒸发。对光热纸的表面形貌和结构进行了表征，探究了吡咯浓度以及单体与氧化剂摩尔比对纸光热性能的影响。结果表明，随吡咯浓度和氧化剂用量的增加，纸的光热性能也随之提升，当吡咯浓度为5 g/L、单体与氧化剂摩尔比为1∶2时，在1 kW/m²的光照强度下，5 min内光热纸的表面温度可达85.3 ℃，水蒸发效率可达93.13%。具有优异能量转换效率和良好可循环性能的光热纸的成功开发，为太阳能水净化提供了一种潜在的技术方案。

Abstract:In this study， unbleached sulphate softwood pulp was used as raw material， the polypyrrole/pulp fiber composite photothermal paper with good hydrophilicity and high energy conversion efficiency was prepared via in-situ polymerization process and used for solar-driven interfacial water evaporation. Its surface morphology and structure were characterized， and the effects of pyrrole concentration and the molar ratio of monomer to oxidant on the photothermal properties were investigated. The results showed that the photothermal properties of paper were improved with the increase of pyrrole concentration and oxidant dosage. When pyrrole concentration was 5 g/L and the molar ratio of monomer to oxidant was 1∶2， under the light intensity of 1 kW/m²， the surface temperature of photothermal paper could reach 85.3 ℃ and the water evaporation efficiency could reach 93.13% within 5 minutes. The success development of the photothermal paper with excellent energy conversion efficiency and good recyclability provided a potential technical scheme for solar-driven water purification.