Preparation of temperature-responsive smart sponge and its application in oil-water separation and dye adsorption

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2024-11-04 DOI:10.1016/j.colsurfa.2024.135628

Cai Ling, Dai Yimin, Li Yaqi, Yang Siwen, Wang Junlong, Liu Bo, Ding Xianglong, Zhang Yue-Fei, Li Yan, Wan Li

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Abstract

At present, researchers are committed to studying new intelligent response materials to deal with severe water pollution problems. Using PU sponge as the substrate, dopamine was first modified to construct a rough surface while introducing active groups. The monomer N-isopropylacrylamide (NIPAM) and itaconic acid (IA) were grafted and polymerized onto the polydopamine coating on the sponge surface by vinyltrimethoxysilane (VTMS). The obtained DINA-PU sponge has good temperature response and switchable wettability characteristics, and has good adsorption-desorption cycle function. Moreover, a micro-filtration device was designed to separate heavy (light) oil-water mixtures. The separation efficiency can reach more than 95 % and 99 % for heavy and light oil-water, respectively. In addition, the adsorption capacity of the material for methylene blue (MB) can reach 660 mg·g⁻¹. The separation efficiency in the oil-water separation-dye adsorption integrated separation experiment can reach more than 99 %.

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温度响应智能海绵的制备及其在油水分离和染料吸附中的应用

目前，研究人员正致力于研究新型智能响应材料，以应对严重的水污染问题。研究人员首先以聚氨酯海绵为基材，对多巴胺进行改性，在引入活性基团的同时构建出粗糙的表面。单体 N-异丙基丙烯酰胺（NIPAM）和衣康酸（IA）通过乙烯基三甲氧基硅烷（VTMS）接枝聚合到海绵表面的聚多巴胺涂层上。得到的 DINA-PU 海绵具有良好的温度响应和可切换的润湿特性，并具有良好的吸附-解吸循环功能。此外，还设计了一种微过滤装置来分离重（轻）油水混合物。重质油水和轻质油水的分离效率分别可达 95% 和 99% 以上。此外，该材料对亚甲基蓝（MB）的吸附能力可达 660 mg-g-1。在油水分离-染料吸附综合分离实验中，分离效率可达 99 % 以上。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.