{"title":"Chemical factors affecting the wetting time of poly(acrylic acid) xerogel powder synthesized by precipitation polymerization technique","authors":"Sahar Farqarazi, Manouchehr Khorasani","doi":"10.1007/s10971-024-06639-8","DOIUrl":null,"url":null,"abstract":"<div><p>The cross-linked poly(acrylic acid) as a hydrophilic polymer network can imbibe several times its weight through the swelling process, which leads to the media’s viscosity enhancement as a thickener. Once this hydrogel originates from the xerogel structure obtained from the precipitation polymerization technique, it is preferred to be easy-to-disperse powder in the aqueous media, otherwise, the coagulation of powder formed in the swelling media requires long and vigorous stirring for dispersion. Therefore, chemical factors in the synthetic step affecting the wetting time of the powder are crucial variables that must be traced for the xerogel quality improvement. In this paper, various concentrations of hydrophobic/hydrophilic comonomers such as stearyl methacrylate, lauryl methacrylate, and acrylamide, as well as a variety of nonionic/anionic surfactants have been investigated to reduce the wetting time and improve the thickening properties of poly(acrylic acid)-based xerogel synthesized by precipitation polymerization technique. Among the co(ter)polymers prepared, the terpolymer of acrylic acid, lauryl methacrylate, and acrylamide, having the optimum viscosity, showed a wetting time of 9 min.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"285 - 295"},"PeriodicalIF":3.2000,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-024-06639-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
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Abstract
The cross-linked poly(acrylic acid) as a hydrophilic polymer network can imbibe several times its weight through the swelling process, which leads to the media’s viscosity enhancement as a thickener. Once this hydrogel originates from the xerogel structure obtained from the precipitation polymerization technique, it is preferred to be easy-to-disperse powder in the aqueous media, otherwise, the coagulation of powder formed in the swelling media requires long and vigorous stirring for dispersion. Therefore, chemical factors in the synthetic step affecting the wetting time of the powder are crucial variables that must be traced for the xerogel quality improvement. In this paper, various concentrations of hydrophobic/hydrophilic comonomers such as stearyl methacrylate, lauryl methacrylate, and acrylamide, as well as a variety of nonionic/anionic surfactants have been investigated to reduce the wetting time and improve the thickening properties of poly(acrylic acid)-based xerogel synthesized by precipitation polymerization technique. Among the co(ter)polymers prepared, the terpolymer of acrylic acid, lauryl methacrylate, and acrylamide, having the optimum viscosity, showed a wetting time of 9 min.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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