Smart filter paper with pH-responsive wettability for effective separation of oil/water mixtures and emulsions

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD Cellulose Pub Date : 2024-12-04 DOI:10.1007/s10570-024-06317-6

Yu-Ping Zhang, Chang-Hua Zhao, Pei Yuan, Li Wan

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Abstract

Materials with stimulus-responsive wettability are attracting increasing attention because of their potential applications in oil/water separation and oil spill remediation. Herein, a pH-responsive filter paper was rapidly fabricated by initially forming a complex between TiO₂ and octadecylamine, followed by immersion in an ethanolic solution of SiO₂ nanoparticles. The resultant filter paper exhibited superhydrophobicity and superoleophilicity in air when the solution pH was greater than 6.0, whereas it became superhydrophilic and superoleophobic when the solution pH was less than 2.0. The treated filter paper was used for the controllable separation of complex oil/water/oil ternary mixtures, demonstrating its strong response to pH changes. The pH-responsive filter paper effectively separated both immiscible oil/water mixtures and different kinds of oil-in-water emulsions with separation efficiencies exceeding 99%. The durability of the pH-responsive filter paper was demonstrated by its ability to maintain a separation efficiency of around 99%, even after 25 cycles of separating a typical emulsion of tetrachloromethane in water. The developed approach has the potential to provide innovative smart materials for the treatment of oil-contaminated wastewater.

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.