Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (10): 26-32.doi: 10.13475/j.fzxb.20180903507

• Fiber Materials • Previous Articles     Next Articles

Preparation of poly(meth)acrylate hollow fiber with internal coating of manganese oxide and its capability to decolorize dyes of methylene blue

GUO Dongyan1,2, XU Naiku1,2(), XIAO Changfa1,2   

  1. 1. School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
    2. State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China
  • Received:2018-09-13 Revised:2018-12-26 Online:2019-10-15 Published:2019-10-23
  • Contact: XU Naiku E-mail:xunaiku@tjpu.edu.cn

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Abstract:

In order to enhance the decolorization efficiency of methylene blue (MB) when it flows in the poly(meth)acrylate hollow fiber, the blend solution of poly (butyl methacrylate-co-hydroxyethyl methacrylate) and poly (butyl acrylate-co-hydroxyethyl methacrylate) synthesized via solution polymerization was used as spinning dope to prepare the above hollow fiber through wet spinning. The process of internal coating was then designed to immobilize in-situ generated manganese oxide onto the inside of hollow fiber through complexation. Meanwhile, the changes of morphology and surface element of hollow fibers before and after functionalization were analyzed by using field emission scanning electron microscopy and X-ray electron spectroscopy, and the composition of manganese oxide was then determined. Additionally, total organic carbon analyzer and inductively coupled plasma atomic emission spectrometer were used to investigate the decolorization of MB. The results show that as far as the hollow fiber prepared after coating is considered, when the aqueous solution of MB flowed into its inside decolorization efficiency is increased from original 10% to 78.7%, and the decolorization efficiency is much higher than 10% even though the manganese oxide-coated hollow fiber is used for several times. It is clear that the strong oxidation of manganese oxide is responsible for the improvement of decolorization efficiency.

Key words: decolorization of waste water, hollow fiber, internal coating, manganese oxide, methylene blue

CLC Number: 

  • TQ342.8

Tab.1

Effect of sulphuric acid hydrolysis time on MB decolorization efficiency%"

样品 1 h 2 h 3 h
HF1 73.3 66.6 60.4
HF2 78.6 69.7 63.9
HF3 76.3 67.7 62.1

Tab.2

Effect of potassium permanganate oxidation time on MB decolorization efficiency%"

样品 0.5 h 1 h 2 h
HF1 70.6 73.3 76.2
HF2 67.7 78.6 79.8
HF3 61.9 70.6 75.1

Fig.1

FESEM images of hollow fibers HF2 and HF2-b. (a) Cross surface of HF2; (b) Outer surface of HF2; (c) Inner surface of HF2; (d) Cross surface of HF2-b; (e) Outer surface of HF2-b; (f) Inner surface of HF2-b"

Fig.2

Total XPS patterns of hollow fibers HF2 and HF2-b"

Fig.3

Local XPS spectra of Mn2p3/2 electrons of HF2-b"

Fig.4

Decolorization efficiency of MB during repeated use of HF2-b"

Tab.3

Mass concentration of total organic carbon and manganese ion in MB solutions before and after decolorization mg/L"

样品编号 总有机碳质量浓度 锰离子质量浓度
L1 2.24 0.40
L2 2.41 0.98
L3 2.92 1.02
L4 2.98 1.52
L5 4.05 1.84
20 mg/L MB 8.62

Fig.5

Local XPS spectra of Mn2p3/2 electrons"

Tab.4

Relative content of Mn(Ⅱ), Mn(Ⅲ) and Mn(Ⅳ) in manganese oxide%"

样品 Mn(Ⅱ) Mn(Ⅲ) Mn(Ⅳ)
HF2-b 3.9 42.5 53.6
HF2-b-1 11.7 46.4 41.9
HF2-b-2 21.2 42.7 36.1
HF2-b-3 27.7 39.9 32.4
HF2-b-4 39.4 31.5 29.1
HF2-b-5 40.5 33.8 25.7
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