离子交换与吸附

本文采用碱性条件下的腈纶水解法,以硫酸肼为交联剂,制备了具有高交换容量和良好物理-机械性能的弱酸性阳离子交换纤维,最高交换容量可达8.4mmol/g(H型干纤)。除研究各种因素对纤维性能的影响外,本文还通过实验及仪器分析手段测定了纤维的结构,初步探讨了水解交联的反应机理。将此离子交换纤维用于净化HCl和NH₃这两种酸、碱有害气体,实验表明吸附性能优于同类树脂。

The weakly acidic cation - exchange fibers with high exchange capacities and good physico-mechanical properties were prepared by hydrolysis of acrylonitrile copolymer fibers under basic condition. The crosslinking agent was hydrazine sulfate. The highest exchange capacity of H+ form fiber is 8. 4 mmol/g. In addition to the investigations of the factors influencing the fibre properties, the fiber structures were studied by experimental and instrumental analysis. The possible mechanisms of hydrolysis and crosslinking reactions were also discussed. When the cation-exchange fibers were utilized in gas cleaning,it was found that their adsorption properties for hydrogen chloride and ammonia were better than other resins,verifying the usage of these fibers as a new ion-exchange material.