Novel hydrophobic polyvinyl alcohol–formaldehyde foams for organic solvents absorption and effective separation

A novel macroporous and hydrophobic polyvinyl alcohol-formaldehyde foam (PVF-GA-H) with open-cell structure and good mechanical property was successfully prepared by the two-step substitution of the hydroxyl groups in polyvinyl alcohol-formaldehyde with glutaraldehyde and stearoyl chloride at ambien...

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Bibliographic Details
Published inRSC advances Vol. 4; no. 2; pp. 660 - 669
Main Authors Pan, Yanxiong, Wang, Weicai, Peng, Chao, Shi, Kai, Luo, Yunxia, Ji, Xiangling
Format Journal Article
LanguageEnglish
Published 01.01.2014
Subjects
Ambient temperature
Chlorides
Foams
Mechanical properties
Pollution abatement
Separation
Solvents
Water pollution
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Summary:A novel macroporous and hydrophobic polyvinyl alcohol-formaldehyde foam (PVF-GA-H) with open-cell structure and good mechanical property was successfully prepared by the two-step substitution of the hydroxyl groups in polyvinyl alcohol-formaldehyde with glutaraldehyde and stearoyl chloride at ambient temperature. The as-prepared PVF-GA-H possessed fast absorption kinetics in a few seconds to organic solvents and can absorb organic solvents up to 89.3 g g super(-1) even in the presence of water. These hydrophobic foams also exhibited highly effective reusability and recovery of organic solvents through a simple absorption-squeezing cycle. Meanwhile, the separation experiment confirmed that the PVF-GA-H foams can absorb and separate organic solvents from a water-organic solvent mixture. Therefore, this kind of foam is a highly suitable candidate for organic chemical pollution and industry leakage.
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ISSN:2046-2069
2046-2069
DOI:10.1039/C3RA43907K