聚乳酸/壳聚糖/Fe3O4超细纤维膜对酸性蓝MTR的吸附性能及机制  

Property and mechanism of poly( lactic acide)/chitosan/Fe3O4 superfine fibrous membrane adsorbing acid blue MTR

作　　者：刘雷艮 沈忠安 林振锋 陶金 LIU Leigen;SHEN Zhongan;LIN Zhenfeng;TAO Jin(School of Textile Garment and Design,Changshu Institute of Technology,Changshu,Jiangsu 215500,China;Wujiang Taoyuan Hairun Printing and Dying Co.,Ltd.,Wujiang,Jiangsu 215236,China;Sujing Environmental Protection New Materials Co.,Ltd.,Suzhou,Jiangsu 215222,China)

机构地区：[1]常熟理工学院纺织服装与设计学院,江苏常熟215500 [2]吴江市桃源海润印染有限公司,江苏吴江215236 [3]苏州市苏净环保新材料有限公司,江苏苏州215222

出　　处：《纺织学报》2020年第5期20-24,共5页Journal of Textile Research

基　　金：江苏省科技厅社会发展项目(BE2017676);苏州市科技局民生科技项目(SS201725);苏州市科技局前瞻性应用研究项目(SYG201827)。

摘　　要：为制备易回收、可生物降解的染料吸附材料,将聚乳酸(PLA)、壳聚糖(CS)和四氧化三铁(Fe3O4)共混溶于三氟乙酸(TFA)溶液中,通过静电纺丝技术制备得到PLA/CS/Fe3O4超细纤维膜,研究了PLA/CS/Fe3O4超细纤维膜的表面形貌、孔隙结构、表面元素及其对酸性蓝MTR的吸附动力学和吸附机制。结果表明:PLA/CS/Fe3O4超细纤维内外均有孔隙结构,纤维的直径为(158±81) nm,比表面积为14.7 m2/g,平均孔径为15. 6 nm,且共混静电纺丝并未改变CS中C-NH2和Fe3O4中Fe元素的化学状态;PLA/CS/Fe3O4超细纤维膜对酸性蓝MTR的平衡吸附量为156 mg/g,吸附动力学实验数据与Lagergren准二级吸附动力学模型吻合较好,表现为化学吸附机制。In order to prepare recyclable and biodegradable adsorption materials for dyes,poly( lactic acide)/chitosan/Fe3O4( PLA/CS/Fe3O4) superfine fibers were prepared by electrospinning through dissolving PLA,CS and Fe3O4 into trifluoroacetic acid( TFA). Surface morphology,porous structure,surface elements and adsorption kinetics and mechanism for adsorbing acid army blue MTR were studied.The results show that pores inside and outside of the PLA/CS/Fe3O4 fiber are created,with average pore diameter being 15.6 nm,the diameter of fiber is( 158±81) nm,the specific surface area is 14. 7 m2/g,while the amount of C-NH2 in the CS and that of Fe in Fe3O4 remain the same. The equilibrium adsorption capacity of PLA/CS/Fe3O4 fibrous membrane is found to be 156 mg/g,its adsorption kinetics relatively agree with Lagergren pseudo-second-order kinetic model,and its adsorption mechanism is identified as chemical adsorption.

关 键 词：超细纤维膜 吸附性能 酸性染料 壳聚糖 四氧化三铁 聚乳酸 

分 类 号：TS102.6[轻工技术与工程—纺织工程]