纳米纤维素/壳聚糖磁性气凝胶染料吸附剂的制备及性能  

Preparation and adsorption performance of nanocellulose/chitosan magnetic aerogel dye adsorbent

作　　者：顾依怡 李玉妹 孙绍刚 杨雪[1] Gu Yiyi;Li Yumei;Sun Shaogang;Yang Xue(School of Textiles and Fashion,Shanghai University of Engineering Science,Shanghai 201620)

机构地区：[1]上海工程技术大学纺织服装学院,上海201620

出　　处：《化工新型材料》2024年第S02期113-117,共5页New Chemical Materials

基　　金：国家级大创项目(cs202310856029);国家自然科学基金青年项目(51903152);上海市科学技术委员会科研计划项目(19YF1417900)。

摘　　要：采用纳米纤维素(CNF)和壳聚糖(CS)为凝胶网络单元,通过掺杂纳米四氧化三铁(Fe_(3)O_(4))赋予其磁性,制备了一种纳米纤维素/壳聚糖磁性气凝胶,并研究了Fe_(3)O_(4)加入量对气凝胶结构、热稳定和吸附性的影响,以及吸附时间、溶液pH和溶液初始浓度对磁性气凝胶染料吸附量的影响。结果表明:CNF/CS磁性气凝胶具有良好的网络多孔结构,表现出良好的磁性吸附性能;加入纳米Fe_(3)O_(4)后,CNF/CS气凝胶的热稳定性显著增加;随着纳米Fe_(3)O_(4)添加量的增加,CNF/CS磁性气凝胶对亚甲基蓝染料吸附性能呈现先降低后增加的趋势,在相同的吸附条件下CNF/CS-1气凝胶对亚甲基蓝染料的吸附性能最优。In this paper,a nanocellulose/chitosan magnetic aerogel was prepared by using nanocellulose(CNF)and chitosan(CS)as gel network units,and magnetic properties were imbued by doping nano-ferric oxide(Fe_(3)O_(4)).The effects of Fe_(3)O_(4)content on the structure,thermal stability and dye adsorption of aerogel were fully studied.At the same time,the effects of adsorption time,pH value of solution and initial concentration of solution on the adsorption capacity of magnetic aerogel for methylene blue dye(MB)were also investigated.The results showed that CNF/CS magnetic aerogel had a good network porous structure and exhibited good magnetic adsorption properties.The thermal stability of CNF/CS aerogel was significantly increased after the addition of nano Fe_(3)O_(4).In addition,with the increase of Fe_(3)O_(4)content,the adsorption properties of CNF/CS magnetic aerogel for MB decreased first and then increased.Under the same adsorption conditions,CNF/CS-1 magnetic aerogel exhibited the best adsorption performance for MB.

关 键 词：纳米纤维素 磁性气凝胶 染料吸附 亚甲基蓝 冷冻干燥 

分 类 号：TS1[轻工技术与工程—纺织科学与工程] TQ31[化学工程—高聚物工业]