Directly coating hydrogel on filter paper for effective oil-water separation in highly acidic, alkaline, and salty environment

Jun-Bing Fan, Yongyang Song, Shutao Wang, Jingxin Meng, Gao Yang, Xinglin Guo, Lin Feng, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

206 Citations (Scopus)

Abstract

The separation of oil-water mixtures in highly acidic, alkaline, and salty environment remains a great challenge. Simple, low-cost, efficient, eco-friendly, and easily scale-up processes for the fabrication of novel materials to effective oil-water separation in highly acidic, alkaline, and salty environment, are urgently desired. Here, a facile approach is reported for the fabrication of stable hydrogel-coated filter paper which not only can separate oil-water mixture in highly acidic, alkaline, and salty environment, but also separate surfactant-stabilized emulsion. The hydrogel-coated filter paper is fabricated by smartly crosslinking filter paper with hydrophilic polyvinyl alcohol through a simple aldol condensation reaction with glutaraldehyde as a crosslinker. The resultant multiple crosslinked networks enable the hydrogel-coated filter paper to tolerate high acid, alkali, and salt up to 8 M H2SO4, 10 M NaOH, and saturated NaCl. It is shown that the hydrogel-coated filter paper can separate oil-water mixtures in highly acidic, alkaline, and salty environment and oil-in-water emulsion environment, with high separation efficiency (>99% ).
Original languageEnglish
Pages (from-to)5368-5375
Number of pages8
JournalAdvanced Functional Materials
Volume25
Issue number33
DOIs
Publication statusPublished - 2 Sep 2015
Externally publishedYes

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