Physically Cross-Linked Double-Network Hydrogel for High-Performance Oil–Water Separation Mesh,Industrial & Engineering Chemistry Research

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Physically Cross-Linked Double-Network Hydrogel for High-Performance Oil–Water Separation Mesh
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-11-12 , DOI: 10.1021/acs.iecr.9b03747
Yong Liu ₁ , Meng Xia ₁ , Lili Wu ₁ , Shenxin Pan ₁ , Yuhong Zhang _{1,

2} , Benqiao He ₂ , Peixin He ₁

Affiliation

Hydrogel-based porous materials have attracted significant attention in the field of oil–water separation due to their oil–water selectivity and low oil adhesion. However, most of the hydrogel-based separation materials have a common problem: poor mechanical properties, no self-healing ability, and narrow application range. Here, the reversible physical interactions in the two networks of poly(vinyl alcohol) (PVA) and poly(acrylamide-co-acrylic acid)/chitosan (P(AM-co-AA)/CS) are applied to cross-link double-network PVA/P(AM-co-AA)/CS hydrogel (HEPC-Gel). In the new hydrogel system, the synergistic effect of two different physically connected networks promotes HEPC-Gel with outstanding mechanical, self-healing properties, and low swelling ratio. More importantly, HEPC-Gel exhibits an attractive micro–nano rough structure and certain chemical tolerance. As a result, HEPC-Gel-coated mesh (HEG-Mesh) not only shows stable superhydrophilicity/underwater superoleophobicity but also achieves excellent oil–water separation ability (separation efficiency >99%, water flux ≈11 000 L·m^–2·h^–1). High-performance double-network hydrogels developed in this work provide a new perspective for the application of hydrogel-based porous materials in oil–water separation.

中文翻译：

物理交联双网络水凝胶，用于高性能油水分离网

基于水凝胶的多孔材料因其油水选择性和低油黏附性而在油水分离领域引起了广泛的关注。然而，大多数基于水凝胶的分离材料具有一个共同的问题：机械性能差，没有自修复能力以及应用范围狭窄。在此，将聚乙烯醇（PVA）和聚（丙烯酰胺-共-丙烯酸）/壳聚糖（P（AM- co -AA）/ CS）这两个网络中的可逆物理相互作用应用于交联双-网络PVA / P（AM- co-AA）/ CS水凝胶（HEPC-凝胶）。在新的水凝胶系统中，两种不同的物理连接网络的协同效应促进了HEPC-Gel具有出色的机械，自愈性能和低溶胀率。更重要的是，HEPC-凝胶具有诱人的微纳粗糙结构和一定的化学耐受性。结果，HEPC凝胶涂层筛网（HEG-Mesh）不仅显示出稳定的超亲水性/水下超疏油性，而且还具有出色的油水分离能力（分离效率> 99％，水通量≈11000L·m ^–2 · h ^–1）。在这项工作中开发的高性能双网络水凝胶为油水分离中基于水凝胶的多孔材料的应用提供了新的视角。

更新日期：2019-11-13

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