菠萝皮渣纤维素/皂土复合水凝胶的制备及其染料吸附性能  

Preparation and dye adsorption properties of pineapple peel cellulose/bentonite composite hydrogels

作　　者：罗钰湲 李辛娅 梁佳翔 刘泓漾 代笛菲 郭小玲 戴宏杰 LUO Yuyuan;LI Xinya;LIANG Jiaxiang;LIU Hongyang;DAI Difei;GUO Xiaoling;DAI Hongjie(College of Food Science,Southwest University,Chongqing 400715,China;Chongqing Chaoyang Middle School,Chongqing 400700,China)

机构地区：[1]西南大学食品科学学院,重庆400715 [2]重庆市朝阳中学,重庆400700

出　　处：《轻工学报》2022年第5期41-49,共9页Journal of Light Industry

基　　金：国家自然科学基金项目(31901683);重庆市雏鹰计划项目(CY210202);重庆市自然科学基金项目(cstc2020jcyj-msxmX0087)。

摘　　要：以菠萝皮渣纤维素(PPC)为原料,通过碱/尿素体系溶解纤维素并掺入皂土,利用化学交联和原位嵌入磁性Fe_(3)O_(4)制备复合水凝胶,并对其结构和染料吸附性能进行研究。结果表明:皂土和Fe_(3)O_(4)在复合水凝胶中成功嵌入,皂土有效改善了水凝胶的交联多孔网络结构、热稳定性和溶胀性能。此外,添加皂土有利于提高水凝胶对亚甲基蓝的吸附性能,其饱和吸附量从28.09 mg/g提高到55.87 mg/g;吸附过程符合准二级动力学模型和Langmuir模型,属于化学吸附和单分子层吸附过程。The pineapple peel cellulose(PPC)was used as raw material to dissolve in an alkali/urea solution with incorporation of bentonite,then further chemically cross-linked and in-situ embedded with magnetic Fe_(3)O_(4) to form composite hydrogels.The structure and dye adsorption properties of hydrogels were studied.The results confirmed the successful intercalation of bentonite and Fe_(3)O_(4) in the hydrogels.The bentonite effectively improved the cross-linked porous network structure,thermal stability and swelling properties of the hydrogel.The bentonite also enhanced the methylene blue adsorption performance of the hydrogels,showing an increased saturated adsorption capacity from 28.09 mg/g to 55.87 mg/g.The adsorption process conformed to the pseudo-second-order kinetic model and Langmuir model,belonging to chemical adsorption and monolayer adsorption.

关 键 词：菠萝皮渣 纤维素 皂土 复合水凝胶 染料 吸附性能 

分 类 号：TS209[轻工技术与工程—食品科学]