中南民族大学学报（自然科学版）2026，Vol.45Issue(5)：587-594,8.DOI:10.20056/j.cnki.ZNMDZK.20260718
季铵化改性壳聚糖纤维吸附溶液中的阿司匹林
Adsorption of aspirin in solution by quaternary amino-functionalized chitosan fibers
摘要
Abstract
Chitosan fibers(CFs)were quaternized under alkaline conditions using(3-chloro-2-hydroxypropyl)-trimethylammonium chloride with epichlorohydrin as a cross-linking agent to synthesize quaternary amino-functionalized chitosan fibers(QECFs).The structure of QECFs was characterized by Fourier transform infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS),and their adsorption performance for aspirin(ASP)in solution was systematically evaluated.The results demonstrated that,compared to pristine CFs,QECFs exhibited a broader pH adaptability and significantly faster adsorption kinetics,achieving 50%of the equilibrium adsorption capacity within 5 minutes and approaching adsorption equilibrium within 30 minutes.The Langmuir maximum adsorption capacity increased significantly from 10.02 mg·g-1 to 284.19 mg·g-1,representing a 28-fold enhancement.Mechanistic studies revealed that the dominant mechanism for the improved adsorption performance was the electrostatic interaction between the quaternary ammonium groups(R4N⁺)on the QECFs molecular chains and the carboxylate groups(―COO‒)of ASP.Protonated amino groups(=NH+―)further contribute synergistically via electrostatic interactions.关键词
壳聚糖/阿司匹林/吸附/纤维Key words
chitosan/aspirin/adsorption/fiber分类
资源环境引用本文复制引用
刘昕,吴桂萍,赵玉凤..季铵化改性壳聚糖纤维吸附溶液中的阿司匹林[J].中南民族大学学报（自然科学版）,2026,45(5):587-594,8.基金项目
国家自然科学基金资助项目(22106184) （22106184）
