温敏水凝胶的改性及其在正渗透工艺中的应用  

Application of Modified Thermo-responsive Hydrogels in Forward Osmosis

作　　者：潘志辉[1] 陈世煜 李灏 余庆慧男 Pan Zhihui;Chen Shiyu;Li Hao;Yu Qinghuinan(Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Guangzhou University,Guangzhou 510006,Guangdong,China)

机构地区：[1]广州大学教育部广东省珠江三角洲水质安全与保护实验室,广东广州510006

出　　处：《绿色科技》2024年第10期262-267,共6页Journal of Green Science and Technology

基　　金：广东省自然科学基金面上项目(编号:2023A1515012058);广东省教育厅创新强校特色创新类项目(编号:2022KTSCX093);广州大学省级大学生创新训练项目(编号:s202211078189)。

摘　　要：温敏水凝胶是一种能够响应外界温度变化的聚合物材料。由于温敏水凝胶具一定的渗透压与易于脱水特性,因此可作为汲取剂应用于正渗透(FO)工艺中。但传统温敏水凝胶的溶胀能力较弱,导致FO工艺的水通量较低。因此需要对温敏水凝胶进行改性,从而获得更高的溶胀性能和渗透压,使温敏水凝胶在FO工艺中具有更广阔的应用前景。介绍了几种通过无机、有机改性的温敏水凝胶,以及其在FO中的应用情况。研究表明:通过添加具有亲水性物质(如无机物污泥灰、氧化石墨烯等,有机物如丙烯酸钠、聚乙二醇等)可有效提高水凝胶的溶胀性能,从而在FO工艺中获得更多的水通量;此外,添加碳颗粒、γ-Fe_(2) O_(3) 等材料可以提高水资源回收率,降低回收能耗。因此,改性后的温敏水凝胶在FO工艺中具有更广阔的应用前景。Thermo-responsive hydrogel(TRH)is a kind of polymer material which can respond to the external temperature stimuli.Due to its osmotic pressure and excellent dehydration properties,TRH can be applied in forward osmosis(FO)process as draw agent.However,the traditional TRH with poor swelling ability cannot generate high water flux during FO process.Therefore,the TRH should be modified to improve its swelling performance and acquire higher osmosis pressure,in order to have a better application prospect in FO process.In this work,several TRHs modified by inorganic or organic materials and their applications in FO were introduced.Studies have shown that the swelling properties of hydrogels can be effectively improved by adding hydrophilic substances(such as inorganic sludge ash,graphene oxide,etc.,organic substances such as sodium acrylate,polyethylene glycol,etc.),thereby obtaining the results in the FO process.In addition,through adding carbon particles,γ-Fe_(2)O_(3) and other materials,more water flux can increase the water resource recovery rate and reduce recycling energy consumption.Therefore,the modified thermosensitive hydrogel has broader application prospects in the FO process.

关 键 词：温敏水凝胶 改性 汲取剂 正渗透 

分 类 号：TQ028.8[化学工程]