氨基膦酸螯合纤维合成和吸附性能的红外光谱研究

在氨基膦酸螯合纤维的制备过程中，用红外光谱法对聚丙烯接枝苯乙烯、乙酰基和多胺系列和氨基膦酸螯合纤维进行了定性研究，用半定量的红外光谱法对氨基膦酸纤维的功能化程度进行了考察，还对氨基膦酸螯合纤维吸附铟和铜后的红外光谱进行了研究。研究表明：(1)钠型氨基膦酸螯合纤维在1 116 cm-1出现了—P(ONa)₂的新峰，验证了基的有效膦酸化。(2)制备过程中，通过红外光谱中1 056和1 110 cm-1峰的变化可以反映出膦酸化的程度。(3)氨基膦酸螯合纤维吸In3+后形成新的N—In配位键，在1 107 cm-1处出现强而宽大的吸收峰，同时在699和617 cm-1出现两个强吸收峰; 氨基膦酸螯合纤维吸附Cu2+形成配合物后，在1 110和618 cm-1处出现两个强而宽的新峰。(4)通过对光谱中1 200～900 cm-1和600 cm-1之间的峰的变化和峰面积的比较，可以反映出氨基膦酸螯合纤维对铟和铜的吸附性能。

FTIR Spectroscopic Study on Synthesis and Adsorption Performance of Amino Phosphonic Acid Chelating Fiber

During the preparation of amino phosphoric chelating fiber, polypropylene grafted styrene, acetyl, amine series and amino phosphonic acid chelating fibers were certified by infrared spectrum, and the functionalization degree of raw fibers was studied. By the semi-qualitative method of infrared spectrum, the adsorption performance of indium and copper on amino phosphonic chelating fiber was also discussed. The results showed that (1) The peak at 1 116 cm-1 was assigned to —P(ONa)₂ in amino phosphonic acid chelating fiber. So the success of phosphorylation was verified. (2) During preparation, the phosphorylation effect of amino phosphonic acid chelating fiber could be reflected by the change of the peaks at 1 056 and 1 110 cm-1. (3) After adsorption of In3+ on amino phosphonic acid chelating fiber, the new forming N-In coordination key was absorbed strongly at the bands of 1 000~1 200 cm-1 and at 1 107, 699 and 617 cm-1. After adsorption Cu2+ on amino phosphonic acid chelating fiber two new strong and wide peaks were found at 1 110 and 618 cm-1, respectively. (4) Through the area change of the bands at 1 200~900 and 600 cm-1 ，the adsorption performance of indium and copper on amino phosphonic acid chelating fiber was compared.