纤维素基芳香聚氨酯多孔聚合物吸附水中双酚AF  

Adsorption of bisphenol AF in water by cellulose-based aromatic polyurethane porous polymer

作　　者：艾士申 刘仁鹏 谢美琪 柴坤刚 纪红兵[1,2] 覃杏珍 AI Shishen;LIU Renpeng;XIE Meiqi;CHAI Kungang;JI Hongbing;QIN Xingzhen(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Enhancement Technology,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西石化资源加工及过程强化技术重点实验室,广西南宁530004

出　　处：《广西大学学报(自然科学版)》2025年第1期213-221,共9页Journal of Guangxi University(Natural Science Edition)

基　　金：国家自然科学基金项目(21868002,21961160741);广西石化资源加工及过程强化技术重点实验室主任基金项目(2021Z010)。

摘　　要：针对双酚AF对生物体和生态环境有重大不利影响的问题,本文以纤维素和三苯基甲烷4,4′,4″三异氰酸酯为原料,通过交联反应合成了纤维素基芳香聚氨酯,混入4,4′二氯甲基联苯,以其作为交联剂通过外交联剂编织法得到一种纤维素基芳香聚氨酯多孔聚合物(CAUP),将其用于吸附水中的双酚AF,应用傅里叶变换红外光谱法、氮气吸附脱附实验对合成材料的结构进行表征。结果表明:CAUP是由大量糖单元和富π电子苯环构成的多孔聚合物,比表面积为1650.6 m^(2)/g。25℃时,在双酚AF质量浓度为300 mg/L的溶液中对CAUP吸附双酚AF的性能进行测试,发现间歇吸附实验在1 min内即达到平衡,CAUP对双酚AF的吸附量为605.7 mg/g,去除率可达98%以上。借助于实验测得吸附动力学、热力学模型数据,经系统性分析知该吸附过程更加契合于准二级动力学和Freundlich模型。在探究环境因素对吸附性能的影响时,发现其吸附性能在酸性和弱碱性条件下表现很好,且不受离子强度影响,但不适用于pH大于10的强碱环境。CAUP经重复使用5次后,仍能保证单位吸附剂对吸附质吸附的最大容量不变,说明其可再生利用性能好。As a kind of endocrine disrupting compound,bisphenol AFhas great adverse effects on biology and ecological environment.In this study,cellulose-based aromatic polyurethane was synthesized from cellulose and triphenylmethane-4,4′,4″-triisocyanate by cross-linking reaction.Then,the cellulose-based aromatic polyurethane porous polymer(CAUP),acted as an adsorbent to remove bisphenol AF in water,was further obtained by using 4,4′-bis(chloromethyl)-1,1′-biphenyl as external crosslinker via knitting method.The structures of the synthesized materials were characterized by FTIR and nitrogen adsorption-desorption experiment.The results show that CAUP contains a porous polymeric framework(with BET surface area of 1650.6 m^(2)/g)consisting of a large number of sugar units andπ-electron-rich benzene rings.At 25℃,the adsorption performance of CAUP is investigated in the solution of bisphenol AF with the mass concentration of 300 mg/L.The results indicate that the adsorption equilibrium is reached within 1 min.Besides,the adsorption capacity of CAUP to bisphenol AF is 605.7 mg/g,and the removal rate is more than 98%.By systematic analysis of the adsorption kinetic and thermodynamic data,the systematic analysis of this adsorption process is more suitable for quasi-secondary kinetics and Freundlich model.Additionally,the results of the influence of environmental factors on adsorption performance show that the adsorption capacity is well maintained in acidic or weakly alkaline conditions.The adsorption capacity is not affected by ionic strength but the over-alkaline environment.As for the regeneration performance,the maximum adsorption capacity of CAUP can keep stable after 5 recycles,indicating that it possesses good recyclability.

关 键 词：纤维素 聚氨酯 外交联法 双酚AF 吸附 

分 类 号：O636[理学—高分子化学]