Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (05): 20-24.doi: 10.13475/j.fzxb.20190806305

• Fiber Materials • Previous Articles     Next Articles

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

LIU Leigen1(), SHEN Zhongan2, LIN Zhenfeng3, TAO Jin1   

  1. 1. School of Textile Garment and Design, Changshu Institute of Technology, Changshu, Jiangsu 215500, China
    2. Wujiang Taoyuan Hairun Printing and Dying Co., Ltd., Wujiang, Jiangsu 215236, China
    3. Sujing Environmental Protection New Materials Co., Ltd., Suzhou, Jiangsu 215222, China
  • Received:2019-08-26 Revised:2020-01-23 Online:2020-05-15 Published:2020-06-02

Abstract:

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 m 2/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.

Key words: superfine fibrous membrane, adsorption property, acid dye, chitosan, ferroferric oxide, poly(lactic acide)

CLC Number: 

  • TS102.6

Fig.1

SEM images of blending superfine fibers. (a)Surface of PLA/CS; (b) Cross section of PLA/CS;(c) Surface of PLA/CS/Fe3O4; (d)Cross section of PLA/CS/Fe3O4"

Fig.2

Nitrogen adsorption-desorption isotherms (a)and pore diameter distribution (b) of PLA/CS and PLA/CS/Fe3O4"

Fig.3

XPS survey spectra of PLA/CS and PLA/CS/Fe3O4. (a) Broad XPS spectra; (b) C1s high-resolution XPS spectra;(c) N1s high-resolution XPS spectra; (d) Fe2p high-resolution XPS spectra"

Fig.4

Effect of contact time on acid army blue MTR adsorption of PLA/CS and PLA/CS/Fe3O4"

Tab.1

Adsorption kinetic parameters of PLA/CS and PLA/CS/Fe3O4"

样品名称 实验吸附量/
(mg·g-1)
准一级动力学参数 准二级动力学参数
k1/
min-1
q1e/
(mg·g-1)
k2/
(g·mg-1·min-1)
q2e/
(mg·g-1)
PLA/CS 114 0.004 6 0.869 6 58.265 0.008 5 0.998 1 117.6
PLA/CS/Fe3O4 156 0.004 7 0.797 5 62.992 0.006 2 0.998 6 161.3

Fig.5

Linear fitting charts of PLA/CS and PLA/CS/Fe3O4for adsorption of acid army blue MTR. (a) Pseudo-first-order kinetic model;(b) Pseudo-second-order kinetic model"

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