Facile Preparation of Hydrophobic Melamine Sponges using Naturally Derived Urushiol for Efficient Oil/Water Separation,ACS Applied Polymer Materials

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Facile Preparation of Hydrophobic Melamine Sponges using Naturally Derived Urushiol for Efficient Oil/Water Separation
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-07-30 , DOI: 10.1021/acsapm.0c00393
Yan Fang ₁ , Liyu Yan ₁ , Haiqing Liu ₁

Affiliation

In this work, hydrophobic sponges for highly efficient oil/water separation and oil absorption were fabricated by a simple, eco-friendly, economical, and scalable dip-coating of hydrophilic melamine sponges in urushiol (a naturally occurring small compound) solution. Because of the unique catechol group and a long alkyl side chain with unsaturated double bonds, urushiol molecules easily adhered on the sponge wall surface and self-polymerized to form a thin hydrophobic coating layer with the assistance of heat treatment. The urushiol-modified melamine sponge (UMS) displayed a water contact angle of ∼139^o and a 3D highly porous structure, so it could effectively separate oil from dynamic oil/water mixtures. The separation flux of n-hexane from an n-hexane/water mixture was as high as 18,356 ± 2200 L·m^–2·h^–1·bar^–1. It could quickly absorb various oils and common organic solvents with an absorption capacity of up to 181 g·g^–1 and had excellent recyclability. UMS also displayed robust mechanical stability, flexibility, elasticity, and thermal stability. Therefore, the facile preparation process, low cost, and superior oil separation/absorption would endow UMS with high potential when dealing with oily wastewater.

中文翻译：

利用天然衍生的漆酚轻松制备疏水性三聚氰胺海绵，可实现有效的油/水分离

在这项工作中，通过简单，环保，经济，可扩展的亲水性三聚氰胺海绵浸入漆酚（一种天然存在的小化合物）溶液中，制造出用于高效油/水分离和吸油的疏水性海绵。由于独特的邻苯二酚基团和带有不饱和双键的长烷基侧链，漆酚分子很容易粘附在海绵壁表面并在热处理的帮助下自聚合形成薄的疏水涂层。漆酚改性的三聚氰胺海绵（UMS）的水接触角约为139 ^o，具有3D高度多孔结构，因此可以有效地将油与动态油/水混合物分离。分离焊剂ñ从己烷Ñ正己烷/水的混合物高达18,356±2200 L·m ^–2 ·h ^–1 ·bar ^–1。它可以迅速吸收各种油类和常见的有机溶剂，吸收容量高达181 g·g ^–1，并且具有出色的可回收性。UMS还显示出强大的机械稳定性，柔韧性，弹性和热稳定性。因此，简便的制备过程，低成本以及出色的油分离/吸收能力将使UMS在处理含油废水时具有很高的潜力。

更新日期：2020-09-11

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