Preparation method of polyquaternary ammonium cationic fiber and its application in nuclear medical waste liquid
Polyquaternary ammonium cationic fibers were prepared by modifying polyacrylonitrile fibers through a hydrothermal reaction method, which solved the problem of low iodide ion removal efficiency in nuclear medical waste liquid and achieved rapid and efficient iodide ion capture and good recycling regeneration performance.
CN119877276BActive Publication Date: 2025-09-26SOUTHWEAT UNIV OF SCI & TECH +1
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Patent Information
- Application Number
- CN202510172190.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2045-02-17
AI Technical Summary
Technical Problem
Existing technologies make it difficult to efficiently remove iodine ions from nuclear medical waste liquid, leading to environmental pollution and health risks.
Method used
Polyacrylonitrile fiber was modified by hydrothermal reaction to prepare polyquaternary ammonium cationic fiber. The polyquaternary ammonium cationic fiber was obtained through five steps of treatment. The rapid adsorption and high adsorption capacity of the fiber were used to remove iodide ions.
Benefits of technology
It achieves rapid adsorption and efficient capture of iodide ions in nuclear medical waste liquid. The adsorption rate is extremely fast, reaching equilibrium within 30 seconds, with high adsorption capacity and good recycling regeneration performance.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a preparation method of polyquaternary ammonium cationic fiber and its application in nuclear medical waste liquid, comprising: activating and pretreating polyacrylonitrile fiber and drying to constant weight; adding an aminating agent and a cross-linking agent to the dried polyacrylonitrile fiber, reacting at a constant temperature to obtain modified polyacrylonitrile fiber; soaking the modified polyacrylonitrile fiber in an acidic solution, washing to neutrality, and drying to constant weight to obtain polyaminated polyacrylonitrile fiber; adding an organic solvent and a halogenated hydrocarbon to the polyaminated polyacrylonitrile fiber, reacting to obtain modified fiber; soaking the modified fiber in a mixed solution of acidic sodium chloride for desorption, washing to neutrality, and drying to constant weight to obtain polyquaternary ammonium cationic fiber. The synthesis method of the present invention is simple and easy to operate, and batch synthesis can be achieved. The prepared polyquaternary ammonium cationic fiber has an extremely fast iodide ion adsorption rate and a high adsorption capacity, and can reach adsorption equilibrium in less than 30 seconds, and can efficiently capture radioactive iodine in nuclear medical waste liquid.
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