文献类型：期刊文献

英文题名：Robust paper-based materials for efficient oil-water emulsion separation

作者：Xi, Jianfeng[1] Lou, Yanling[1] Jiang, Shan[1] Fang, Guigan[2] Wu, Weibing[1,3]

第一作者：Xi, Jianfeng

通信作者：Wu, WB[1]

机构：[1]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Jiangsu Prov Key Lab Pulp & Paper Sci & Technol, Nanjing 210037, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Nanjing 210042, Peoples R China;[3]Qilu Univ Technol, Shandong Acad Sci, State Key Lab Biobased Mat & Green Papermaking, Jinan 250353, Peoples R China

年份：2021

卷号：28

期号：16

起止页码：10565-10578

外文期刊名：CELLULOSE

收录：;EI(收录号：20213610869487);Scopus(收录号：2-s2.0-85114310169);WOS:【SCI-EXPANDED(收录号:WOS:000698166300002)】；

基金：The support of this work by National Key Research and Development Program of China (2017YFD0601005), the Foundation of State Key Laboratory of Biobased Material and Green Papermaking (No. KF201804, Qilu University of Technology, Shangdong Academy of Sciences) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) are gratefully acknowledged.

语种：英文

外文关键词：Paper-based material; Underwater superoleophobic; Pore size; Oil-water separation

摘要：Developing a feasible and efficient separation membrane for the purification of emulsified oily wastewater is challenging due to the critical limitations of serious fouling during membrane preparation. Herein, underwater superoleophobic paper-based materials with high wet strength were prepared by low cost and green papermaking technology. The fibrillation of cellulose fibers was achieved by beating to optimize the pore structure of paper sheets. Simple modification of paper sheets with 1,2,3,4-butanetetracarboxylic acid significantly improves the surface hydrophilicity and the wet strength through the crosslinking reaction between fibers. The maximum underwater oil contact angle and wet strength of the modified paper sheets are high up to 167.8 degrees and 36.5 N center dot m/g, respectively. The water flux can be adjusted in the range of 25.8 L m(-2) h(-1)-4920 L m(-2) h(-1) by controlling the average pore size from 6.64 mu m to 18.9 mu m. Lower pore size and higher carboxyl content of the paper-based materials are beneficial to improve the oil rejection, which can reach more than 99.3% even for submicron emulsified oils. Most of the paper sheets achieve efficient oil-water separation although the average pore size is remarkably larger than the emulsified oil droplet. The reason can be attributed to the zigzag pore structure of paper sheets, which is favorable to form liquid bridge on the surface as well as collision demulsification in the Z-direction channel, thereby promoting the mechanical interception effects. The low-cost, eco-friendly, easily-manufactured and highly efficient paper-based separation materials possess wide applications in oily wastewater treatment.