文献类型：期刊文献

中文题名：交联纤维素基阳离子交换纤维的制备与应用

英文题名：Preparation and Application of Crosslinked Cellulose-based Cation-exchange Fibers

作者：邵心怡[1,2] 耿博[1] 吕娜娜[1] 焦婷[1] 梁龙[1,2] 吴珽[1,2]

第一作者：邵心怡

机构：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏南京210042;[2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037

年份：2025

卷号：45

期号：6

起止页码：98-106

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：;北大核心:【北大核心2023】；

基金：中国林科院中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2024ZA021-5)。

语种：中文

中文关键词：交联改性;纤维素纤维;离子交换;废水净化

外文关键词：crosslinking modification;cellulose fiber;ion exchange;wastewater purifying

分类号：TQ352.4

摘要：以漂白针叶木浆板为原料,采用交联(C)反应协同醚化(E)反应对纤维素纤维进行双重功能化改性,考察了先交联后醚化(C-E)、先醚化后交联(E-C)和同步交联醚化(C/E)这3种不同反应途径对功能化纤维的影响。实验结果表明:同步交联醚化是实现离子交换容量与纤维产率“双高目标”的有效手段,同步交联醚化阳离子交换纤维(C/E-CEF)的阳离子交换容量(H_(CEC))与产率分别达到2.083 mol/kg和124.9%。纤维长宽比值37.0,结晶度13.24%,晶粒尺寸1.88 nm。C/E-CEF对亚甲基蓝(MB)的吸附符合Langmuir等温线模型,属于单分子层吸附;吸附的吉布斯自由能(ΔG^(?))为负值,熵变(ΔS^(?))为65.50 J/(mol·K),焓变(ΔH^(?))为16.42 kJ/mol,即该吸附是能自发进行的吸热过程;吸附过程符合准二级动力学方程,以化学吸附为主。C/E-CEF对亚甲基蓝(MB)染料废水展现出良好的吸附净化效果,初次吸附率为98.9%,4次解吸再生后吸附率仍可达到97.9%。
Using bleached needle-leaf wood pulp board as raw material,the functional modification of cellulose fibers was carried out by the synergistic reaction of cross-linking(C)and etherification(E).The cellulose-based cation-exchange fibers were prepared by three reaction pathways.The experimental results showed that simultaneous crosslinking-etherification was an effective approach to achieve both high ion-exchange capacity and high fiber yield.The cation exchange fiber prepared via simultaneous crosslinking-etherification(C/E-CEF)exhibited an cation-exchange capacity(H_(CEC))of 2.083 mmol/g,a yield of 124.9%,a fiber aspect ratio of 37.0,a crystallinity of 13.24%,and a crystallite size of 1.88 nm.The adsorption of methylene blue(MB)onto C/E-CEF followed the Langmuir isotherm model,indicating monolayer adsorption.The Gibbs free energy change(ΔG^(?))was negative,the entropy change(ΔS^(?))was 65.50 J/(mol·K),and the enthalpy change(ΔH^(?))was 16.42 kJ/mol,demonstrating that the adsorption is a spontaneous endothermic process.The adsorption kinetics fitted well with the pseudosecond-order model,suggesting chemisorption as the dominant mechanism.C/E-CEF exhibited excellent adsorption performance for methylene blue dye wastewater,with an initial adsorption rate of 98.9%.Even after four cycles of regeneration,the adsorption rate remained as high as 97.9%.