摘要
通过静电纺丝制备以聚丙烯腈(polyacrylonitrile,PAN)/聚乙烯吡咯烷酮(polyvinylpyrrolidone,PVP)为壳,PVP/纤维素纳米晶体(cellulose nanocrystal,CNC)为核的Janus结构纳米纤维膜,并利用绿色的水刻蚀法获得用于油水分离的多孔通道结构纳米纤维膜。结果表明,多孔通道结构增加了纳米纤维内部的储水空间,提供了额外的水分渗透路径,赋予了纳米纤维膜优异的亲水性和水下超疏油性。纳米纤维膜的孔隙率从54%提升至83%,水下油接触角从134°提升至164°,水通量从731 L/(m^(2)·h)提升至3344 L/(m^(2)·h)。纳米纤维膜对水包正己烷乳液的渗透通量高达1985 L/(m^(2)·h),滤液中的TOC含量低于50 mg/L,表明其油水分离效果较好。这种多孔通道结构纳米纤维膜的设计理念为开发油水分离膜提供了一种绿色的制造思路。
In this study,the Janus nanofibrous membrane with Polyacrylonitrile(PAN)/Polyvinylpyrrolidone(PVP)as shell and PVP/cellulose nanocrystal(CNC)as core was prepared by electrospinning.Then,the green water etching method was used to obtain a nanofibrous membrane with a porous channel structure.The results showed that the porous channel structure enlarged the water storage space inside the nanofiber,provided additional water permeation paths for the nanofibrous membrane,and gave the nanofibrous membrane excellent hydrophilicity and underwater super-oleophobicity,which increased the porosity from 54%to 83%,the underwater oil contact angle from 134°to 164°,and the water flux from 731 L/(m^(2)·h)to 3344 L/(m^(2)·h).The permeation flux of the nanofibrous membrane to the n-hexane-in-water emulsion was as high as 1985 L/(m^(2)·h),and the TOC content in the filtrate was less than 50 mg/L.The membrane with a porous channel structure showed excellent oil/water separation performance.The porous channel structure design provides a green concept for the development and manufacture of oil/water separation membranes.
作者
毛竹远
裴飞飞
陈芋
韩广萍
程万里
MAO Zhuyuan;PEI Feifei;CHEN Yu;HAN Guangping;CHENG Wanli(Key Laboratory of Biomass Materials Science and Technology of Ministry of Education,Northeast Forestry University,Harbin 150040,Heilongjiang,China)
出处
《木材科学与技术》
北大核心
2024年第1期32-41,共10页
Chinese Journal of Wood Science and Technology
基金
中央高校基本科研业务费“静电纺纤维素异质结构纤维的构建及性能调控”(2572023AW53)。
