In order to improve the adsorption capacity of chitosan to organic dyes, the amino rich functionalized chitosan electrospun nanofibers membrane was prepared. In the process of high efficiency synthesis, PGMA and PEI were grafted on the surface of CS NFMs in turn. By means of XRD, ATR-FTIR and XPS, the successful introduction of amino group into CS was confirmed. The selective adsorption capacity of CS-PGMA-PEI NFMs for anionic dyes was studied. The adsorption kinetics analysis shows that the adsorption process of CS-PGMA-PEI NFMs is mainly pseudo second-order model. Its adsorption isotherms can be described by the Langmuir model and it conforms to monolayer adsorption. The maximum adsorption capacity of Congo red calculated by Langmuir model is 657.47 mg/g. CS-PGMA-PEI NFMs has selective adsorption capacity for Congo red/methylene blue mixture. CS-PGMA-PEI NFMs also showed good circulation stability. This study provides a method for the synthesis of water purification membrane.

为了提高壳聚糖对有机染料的吸附能力，制备了富含氨基的功能化壳聚糖电纺纳米纤维膜。在高效合成过程中，将PGMA和PEI依次接枝到CS NFM的表面。借助XRD，ATR-FTIR和XPS，证实了氨基已成功导入CS。研究了CS-PGMA-PEI NFM对阴离子染料的选择性吸附能力。吸附动力学分析表明，CS-PGMA-PEI NFMs的吸附过程主要是伪二级模型。它的吸附等温线可以用Langmuir模型描述，并且符合单层吸附。由Langmuir模型计算得出的刚果红的最大吸附容量为657.47 mg / g。CS-PGMA-PEI NFM对刚果红/亚甲基蓝混合物具有选择性吸附能力。CS-PGMA-PEI NFM也显示出良好的循环稳定性。本研究提供了一种合成水净化膜的方法。