{"title":"Superhydrophilic and Oil-Resistant SiO2/PU Fiber Membrane for Oil-In-Water Emulsion Separation under Gravity","authors":"","doi":"10.1007/s12221-024-00526-3","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>A polyurethane membrane with interlayer channels was developed through electrospinning to separate oily sewage. To enhance its hydrophilicity, hydrophilic silica particles were grafted onto the fiber surface, creating a rough surface. This was done by treating the membrane with oxygen plasma to generate active sites, which were then coupled with 3-aminopropyltriethoxysilane, followed by adding the membrane to a hydrolytic solution of tetraethyl orthosilicate. The resultant membrane had a low water contact angle of 23.3° and excellent underwater oleophobicity, with a high-underwater oil contact angle (varied from 155.9 to 159.7°) and underwater oil sliding angle (ranged from 4.0 to 4.6°) for different types of oils. In addition, the prepared membrane had a good moisture-evaporation rate (4.2 g/h) and water-absorption capacity (273%). It is also oil-resistant and self-cleaning in water, and could efficiently separating oil-in-water emulsion under gravity, with an initial separation flux of 2864 L/m<sup>2</sup>/h. During cyclic separation of emulsion, the membrane had the oil-retention rate of more than 99.0%, and the final separation flux of the membrane was maintained at 25 L/m<sup>2</sup>/h.</p>","PeriodicalId":557,"journal":{"name":"Fibers and Polymers","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fibers and Polymers","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12221-024-00526-3","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, TEXTILES","Score":null,"Total":0}
引用次数: 0
Abstract
A polyurethane membrane with interlayer channels was developed through electrospinning to separate oily sewage. To enhance its hydrophilicity, hydrophilic silica particles were grafted onto the fiber surface, creating a rough surface. This was done by treating the membrane with oxygen plasma to generate active sites, which were then coupled with 3-aminopropyltriethoxysilane, followed by adding the membrane to a hydrolytic solution of tetraethyl orthosilicate. The resultant membrane had a low water contact angle of 23.3° and excellent underwater oleophobicity, with a high-underwater oil contact angle (varied from 155.9 to 159.7°) and underwater oil sliding angle (ranged from 4.0 to 4.6°) for different types of oils. In addition, the prepared membrane had a good moisture-evaporation rate (4.2 g/h) and water-absorption capacity (273%). It is also oil-resistant and self-cleaning in water, and could efficiently separating oil-in-water emulsion under gravity, with an initial separation flux of 2864 L/m2/h. During cyclic separation of emulsion, the membrane had the oil-retention rate of more than 99.0%, and the final separation flux of the membrane was maintained at 25 L/m2/h.
期刊介绍：
-Chemistry of Fiber Materials, Polymer Reactions and Synthesis-
Physical Properties of Fibers, Polymer Blends and Composites-
Fiber Spinning and Textile Processing, Polymer Physics, Morphology-
Colorants and Dyeing, Polymer Analysis and Characterization-
Chemical Aftertreatment of Textiles, Polymer Processing and Rheology-
Textile and Apparel Science, Functional Polymers
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