丙烯酸接枝改性壳聚糖的纤维膜制备及其对Cu^(2+)、Cd^(2+)离子吸附研究  

Study on preparation of acrylic acid grafted modified chitosan fiber membrane and its adsorption of Cu^(2+) and Cd^(2+) ions

作　　者：梁兆毅 杨迪 陈乐民 邓学良 梁欣 蒙杏 许凡冰 蒋林斌[1,2] LIANG Zhao-yi;YANG Di;CHEN Le-min;DENG Xue-liang;LIANG Xin;MENG Xing;XU Fan-bing;JIANG Lin-bin(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification 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）》2022年第2期462-469,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(51963001);广西石化重点实验室主任基金项目(2018Z002)。

摘　　要：以过硫酸铵为引发剂,制备壳聚糖(CS)和丙烯酸(AA)的接枝共聚物(CS-g-PAA),采用静电纺丝技术将其制备成纤维膜,考察不同接枝率、电纺溶液浓度、直流电压对电纺纤维的影响,用红外光谱、扫描电镜对共聚物和纤维膜的结构进行表征,测试该纤维对Cu ^(2+)、Cd ^(2+)离子的吸附性能。实验结果表明,接枝率越高电纺纤维形貌越好,相对最佳电纺条件为溶液质量分数15%和电纺电压11 kV;CS-g-PAA电纺纤维膜对Cu ^(2+)、Cd ^(2+)的吸附量相比CS提高了25.39%和82.28%,相比CS-g-PAA其吸附速度更快,但其饱和吸附容量比较接近。Using ammonium persulfate as the initiator,a graft copolymer(CS-g-PAA)of chitosan(CS)and acrylic acid(AA)is prepared into fiber membranes by electrospinning technology.The effects of different grafting rates,electrospinning solution concentration,and DC voltage on electrospinning fibers are investigated.The structure of the copolymer and fiber membrane is characterized by infrared spectroscopy and scanning electron microscope,and the adsorption properties of the fiber to Cu ^(2+)and Cd ^(2+)ions are tested.The electrospinning experiment of CS-g-PAA shows that the higher the grafting rate is,the better the morphology of the electrospun fiber is,and the relative optimal electrospinning conditions are the solution mass fraction of 15%and the voltage of 11 kV.Compared with CS,the adsorption capacity of CS-g-PAA electrospun fiber membrane for Cu ^(2+)and Cd ^(2+)is increased by 25.39%and 82.28%;compared with CS-g-PAA,its adsorption speed is faster,but the saturated adsorption capacity is relatively close.

关 键 词：壳聚糖 丙烯酸 接枝共聚 电纺纤维 重金属吸附 

分 类 号：O629.12[理学—有机化学]