{"title":"水溶性臭氧化木质素作为渗透蒸发脱盐用聚乙烯醇膜亲水性改性剂","authors":"Chia-Yu Lai , Yi-Ming Sun , Ying-Ling Liu","doi":"10.1016/j.memsci.2023.121959","DOIUrl":null,"url":null,"abstract":"<div><p><span>Poly (vinyl alcohol) (PVA)-based membranes are widely applied to pervaporation desalination. Further modification of the PVA-based membranes with suitable additives is attractive for increasing the water permeation fluxes. In this work, water-soluble ozonated lignin (W</span><sub>s</sub>-OL) was prepared and used as an additive for preparation of W<sub>s</sub><span>-OL-modified PVA membranes, which showed relatively high surface hydrophilicity, reduced crystallinity, and small crystallite sizes compared to the neat PVA membrane. The W</span><sub>s</sub>-OL modification brought a 2.1 times of water permeation flux to the PVA membrane in pervaporation desalination on a 3.5 wt% NaCl<sub>(aq)</sub> solution at 25 °C. Under an optimum condition, the modified PVA membrane possessing 50 wt% W<sub>s</sub>-OL and being crosslinked with 4-sulfophthalic acid (SPTA) exhibited a water permeation flux and a salt rejection of 78,630 g m<sup>-2</sup> h<sup>-1</sup> and 99.91%, respectively. The high efficiency of W<sub>s</sub>-OL in modifying hydrophilic membranes is noteworthy and could be potentially applied to other membranes for pervaporation separation and oil-water separations.</p></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"685 ","pages":"Article 121959"},"PeriodicalIF":8.4000,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Water-soluble ozonated lignin as a hydrophilic modifier for poly(vinyl alcohol) membranes for pervaporation desalination\",\"authors\":\"Chia-Yu Lai , Yi-Ming Sun , Ying-Ling Liu\",\"doi\":\"10.1016/j.memsci.2023.121959\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span>Poly (vinyl alcohol) (PVA)-based membranes are widely applied to pervaporation desalination. Further modification of the PVA-based membranes with suitable additives is attractive for increasing the water permeation fluxes. In this work, water-soluble ozonated lignin (W</span><sub>s</sub>-OL) was prepared and used as an additive for preparation of W<sub>s</sub><span>-OL-modified PVA membranes, which showed relatively high surface hydrophilicity, reduced crystallinity, and small crystallite sizes compared to the neat PVA membrane. The W</span><sub>s</sub>-OL modification brought a 2.1 times of water permeation flux to the PVA membrane in pervaporation desalination on a 3.5 wt% NaCl<sub>(aq)</sub> solution at 25 °C. Under an optimum condition, the modified PVA membrane possessing 50 wt% W<sub>s</sub>-OL and being crosslinked with 4-sulfophthalic acid (SPTA) exhibited a water permeation flux and a salt rejection of 78,630 g m<sup>-2</sup> h<sup>-1</sup> and 99.91%, respectively. The high efficiency of W<sub>s</sub>-OL in modifying hydrophilic membranes is noteworthy and could be potentially applied to other membranes for pervaporation separation and oil-water separations.</p></div>\",\"PeriodicalId\":368,\"journal\":{\"name\":\"Journal of Membrane Science\",\"volume\":\"685 \",\"pages\":\"Article 121959\"},\"PeriodicalIF\":8.4000,\"publicationDate\":\"2023-11-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Membrane Science\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0376738823006154\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Membrane Science","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0376738823006154","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
摘要
聚乙烯醇(PVA)基膜广泛应用于渗透蒸发脱盐。用合适的添加剂对聚乙烯醇基膜进行进一步改性，对于提高水渗透通量是有吸引力的。本文制备了水溶性臭氧化木质素(Ws-OL)，并将其作为添加剂用于制备Ws-OL修饰的PVA膜，与纯PVA膜相比，该膜具有较高的表面亲水性，结晶度降低，晶粒尺寸小。Ws-OL改性后的PVA膜在3.5 wt% NaCl(aq)溶液中，在25°C下进行渗透蒸发脱盐，其渗透通量提高了2.1倍。在最佳条件下，Ws-OL含量为50%的改性PVA膜与4-磺化邻苯二甲酸(SPTA)交联后，膜的渗透通量为78,630 g m-2 h-1，除盐率为99.91%。Ws-OL对亲水性膜的高效改性是值得关注的，并有可能应用于其他膜的渗透蒸发分离和油水分离。
Water-soluble ozonated lignin as a hydrophilic modifier for poly(vinyl alcohol) membranes for pervaporation desalination
Poly (vinyl alcohol) (PVA)-based membranes are widely applied to pervaporation desalination. Further modification of the PVA-based membranes with suitable additives is attractive for increasing the water permeation fluxes. In this work, water-soluble ozonated lignin (Ws-OL) was prepared and used as an additive for preparation of Ws-OL-modified PVA membranes, which showed relatively high surface hydrophilicity, reduced crystallinity, and small crystallite sizes compared to the neat PVA membrane. The Ws-OL modification brought a 2.1 times of water permeation flux to the PVA membrane in pervaporation desalination on a 3.5 wt% NaCl(aq) solution at 25 °C. Under an optimum condition, the modified PVA membrane possessing 50 wt% Ws-OL and being crosslinked with 4-sulfophthalic acid (SPTA) exhibited a water permeation flux and a salt rejection of 78,630 g m-2 h-1 and 99.91%, respectively. The high efficiency of Ws-OL in modifying hydrophilic membranes is noteworthy and could be potentially applied to other membranes for pervaporation separation and oil-water separations.
期刊介绍：
The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.
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