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以腈纶纤维为原料,采用微波加热冷凝回流的方法制备了一种含有大量胺基和羧甲基的功能化纤维材料,该纤维对Cu~(2+)有较高的吸附能力。利用傅里叶红外光谱(FT-IR)对改性纤维进行了表征,并讨论了吸附时间、温度、溶液浓度对纤维吸附性能的影响。结果表明,采用微波加热制备改性纤维,在保证纤维具有良好机械强度的同时,大大缩短了反应时间,并且纤维对Cu~(2+)的吸附在120 min内达到平衡,15℃时最大吸附量为103.36 mg·g~(-1),吸附过程符合Freundlich等温模型和准二级动力学方程。经5次吸附/解吸附后,吸附量无显著变化。
Using acrylic fiber as raw material, a functionalized fiber material containing a large amount of amine groups and carboxymethyl groups was prepared by microwave heating and refluxing. The fiber has high adsorption capacity for Cu 2+. The modified fibers were characterized by Fourier transform infrared spectroscopy (FT-IR), and the influence of adsorption time, temperature and solution concentration on the fiber adsorption properties was discussed. The results showed that the preparation of modified fiber by microwave heating can greatly shorten the reaction time while ensuring the fiber has good mechanical strength, and the adsorption of Cu 2+ by fiber reaches the equilibrium within 120 min, and the maximum adsorption at 15 ℃ The amount of 103.36 mg · g -1, the adsorption process in line with the Freundlich isothermal model and quasi-second-order kinetic equation. After 5 times of adsorption / desorption, the amount of adsorption did not change significantly.