Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (02): 95-102.doi: 10.13475/j.fzxb.20190504808

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation of TiO2/MIL-88B(Fe)/polypropylene composite melt-blown nonwovens and study on dye degradation properties

LIU Yuhao, SUN Hui, WANG Jieqi, YU Bin()   

  1. College of Textile Science and Engineering & International Institute of Silk, Zhejiang Sci-Tech University,Hangzhou, Zhejiang 310000, China
  • Received:2019-05-21 Revised:2019-11-21 Online:2020-02-15 Published:2020-02-21
  • Contact: YU Bin E-mail:yubin7712@163.com

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Abstract:

In order to functionalize polypropylene (PP) melt-blown nonwovens and expand their application on water treatment, TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens were prepared by use of 2,4-terephthalic acid, ferric chloride hexahydrate and nano-titanium oxide as raw materials and PP melt-blown nonwovens as the substrate. PP melt-blown nonwovens was first pretreated by impregnation process. Then, the metal-organic framework TiO2/MIL-88B(Fe) was fixed on the surface of PP melt-blown nonwovens via solvothermal method. The structure and properties of the TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens were characterized by Fourier transform infrared spectrometer, X-ray diffraction and aperture analyzer. It is indicated that TiO2/MIL-88B (Fe) was successfully loaded on the surface of PP melt-blown nonwovens substrate. Under visible light irradiation, the degradation rates of the TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens for methyl blue, acid orange 7, acid red 73 are more than 80%, and especially, its degradation rate for methyl blue could reach 86%, the degradation rate of Rhodamine B also reaches 59%. After 5 cycles of tests, the removal rate of methyl blue by composites is above 70%, the catalytic performance is stable.

Key words: polypropylene, melt-blown nonwoven material, metal skeleton compound, Fenton-like system, degradation of organic dye

CLC Number: 

  • TB430

Fig.1

Surface morphology of melt-blown nonwoven. (a) Original PP(×2 000); (b) SDS coated PP melt-blown nonwoven(×3 000); (c) FeCl3·6H2O impregnated PP melt-blown nonwoven(×3 000);(d) TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens(×3 000)"

Fig.2

Images of composite melt-blown nonwoven fiber surface(×3 000). (a) TiO2/MIL-88B(Fe)/PP;(b) C element; (c) O element; (d) Fe element; (e) Ti element;(f) Elemental spectrum"

Tab.1

Surface element content of composite melt-blown nonwovens%"

元素 质量百分数 原子百分数
C 76.90 82.79
O 20.51 16.56
Na 0.11 0.06
S 0.10 0.04
Ti 1.23 0.34
Fe 1.15 0.27

Fig.3

Comparison of PP melt-blown nonwovens before and after MOFs loading"

Fig.4

Comparison of PP melt-blown nonwovens before and after loading MOFs"

Fig.5

Pore size distribution of melt-blown nonwovens"

Fig.6

Methyl blue degradation performance"

Fig.7

Dyes degradation effect of TiO2/MIL-88B(Fe)/PP composite melt-blown nonwoven under different conditions. (a) Degradation of different types of dyes;(b) Effects of different H2O2 concentrations;(c) Effects of different pH;(d) Effects of different temperatures"

Fig.8

Reuse of composite melt-blown nonwovens"

Fig.9

SEM images of TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens (×5 000)"

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