基于柚子皮新型水凝胶材料的制备及性能  

Preparation and Properties of A New Hydrogel Material Based on Grapefruit Peel

作　　者：乔得成 钟源 蔡立群[1,2,3] 齐鹏 武均[1,2,3] QIAO Decheng;ZHONG Yuan;CAI Liqun;QI Peng;WU Jun(College of Resources and Environment,Gansu Agricultural University,Lanzhou 730070,China;The State Key Laboratory of Drought-Habitat Crop Science,Lanzhou 730070,China;Gansu Province Water-saving Agricultural Engineering and Technology Research Center,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]干旱生境作物科学国家重点实验室,甘肃兰州730070 [3]甘肃省节水农业工程技术研究中心,甘肃兰州730070

出　　处：《广州化学》2024年第6期41-45,I0003,共6页Guangzhou Chemistry

基　　金：甘肃省自然科学基金(20JR10RA543);甘肃农业大学公招博士科研启动基金(GAU-KYQD-2018-39)。

摘　　要：以柚子皮为原料,采用过硫酸铵(APS)作为引发剂,通过丙烯酸(AA)和丙烯酰胺(AAM)的聚合反应,以N,N'-亚甲基双丙烯酰胺(MBA)作为交联剂,成功制备了基于柚子皮的新型水凝胶材料。调整几种成分的不同比例,制备了五种不同配比的水凝胶;测试了这些水凝胶在超纯水中的溶胀比,并通过红外光谱和扫描电子显微镜对水凝胶结构进行了分析;进一步研究了所选水凝胶在不同pH值溶液中的吸水性能,以及其在园艺土壤和砂土中的保水和持水性能。结果表明:AA∶AAM∶MBA配比为7∶3∶0.025的水凝胶(G2)具有最佳的水吸收性能,溶胀比可达563倍;G2水凝胶在pH为7.42时表现出较强的保水能力,且在0.5%和0.1%的添加量下,能显著提高园艺土壤和砂土的持水保水能力。本研究为干旱地区农田土壤水资源利用提供新策略。In this study,novel hydrogel materials based on pomelo peel were successfully prepared by polymerisation of acrylic acid(AA)and acrylamide(AAM)using ammonium persulfate(APS)as initiator and N,N'-methylenebisacrylamide(MBA)as cross-linker.Five hydrogels with different ratios were prepared by adjusting different ratios of reagents.The swelling ratios of these hydrogels in ultrapure water were tested,and the hydrogel structures were analysed by infrared spectroscopy and scanning electron microscopy.The water absorption properties of the selected hydrogels in different pH solutions and their water retention and holding properties in horticultural and sandy soils were further investigated.The results showed that the hydrogel(G2)with the ratio of AA/AAM/MBA of 7/3/0.025 had the best water absorption performance,with a swelling ratio of up to 563-fold.The G2 hydrogel showed a stronger water retention capacity at pH 7.42,and significantly improved the water holding and water retention capacity of horticultural and sandy soils at 0.5%and 0.1%additions.It provides a new strategy for the use of water resources in agricultural soils in arid regions.

关 键 词：水凝胶 柚子皮 丙烯酸 丙烯酰胺 超吸水性 

分 类 号：O63[理学—高分子化学]