Preparation and oil-water separation performance of green cellulose-based hydrogel membrane

被引：0

作者：

Cao Y. ^{[1
]}

Gao J. ^{[1
]}

Xia M. ^{[1
]}

Xu P. ^{[1
]}

Han Z. ^{[2
]}

Chen Y. ^{[1
]}

机构：

[1] School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhejiang, Zhoushan

[2] School of Energy and Power Engineering, Jiangsu University, Jiangsu, Zhenjiang

来源：

Jingxi Huagong/Fine Chemicals | 2024年 / 41卷 / 05期

关键词：

cellulose hydrogel membranes; freezing and salting out; functional materials; gravity-driven; oil-water separation; PVA; waste wood recycling;

D O I：

10.13550/j.jxhg.20230468

中图分类号：

学科分类号：

摘要：

Cellulose-based (CLH) hydrogel membrane was prepared by encapsulating LiCl particles on the cellulose scaffold, which was cellulose pulp (PF-NA) extracted from poplar wood powder (PF), with polyvinyl alcohol (PVA) via freezing and salting out technique. The CLH hydrogel membrane obtained was then characterized by FTIR, SEM, XRD, and XPS, and evaluated for its mechanical performance, resistance in high-temperature, acid-base as well as salt, self-cleaning, and anti-fouling. The results indicated that CLH hydrogel membrane exhibited three-dimensional layered structures, while the addition of PVA and the utilization of freezing and salting out technique enhanced its mechanical performance. Hydrophilic LiCl, distributed around the cellulose scaffold, made the CLH hydrogel membrane super-hydrophilic with an underwater oil contact angle of 151°. Under the influence of gravity, the CLH hydrogel membrane effectively separated oil/water mixtures and oil-in-water emulsions, maintaining stable separation efficiency (≥99.8%) under harsh conditions of high-temperature (60 ℃), strong acid (pH=3), and strong alkali (pH=13). Moreover, the CLH hydrogel membrane exhibited consistent separation performance over 12 cycles of engine oil-in-water emulsion separation and demonstrated self-cleaning and anti-fouling capabilities against tetrachloroethylene oil stains. © 2024 Fine Chemicals. All rights reserved.

引用

页码：990 / 1000

页数：10

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