Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (05): 124-129.doi: 10.13475/j.fzxb.20210500806

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation of functional spunlaced viscose fiber membrane and its application for laccase immobilization

LIU Suo1, WANG Yaqian2, WEI Anfang1, ZHAO Lei1, FENG Quan1()   

  1. 1. School of Textiles and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
    2. Engineering Research Center for Knitting Technology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2021-05-05 Revised:2022-01-13 Online:2022-05-15 Published:2022-05-30
  • Contact: FENG Quan E-mail:fengquan@ahpu.edu.cn

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Abstract:

Aiming at the shortcomings of low loading rate of laccase with the existing materials and poor cyclic use performance after loading laccase, spunlaced viscose fiber membrane were surfaced modified for improved bonding of polymer chains adopting the atom transfer radical polymerization method, using hydroxyethyl methacrylate (HEMA) as the monomer (SV-poly(HEMA)) followed by coordination with Fe3+ions(SV-poly(HEMA)-Fe(Ⅲ)), which, as a carrier, was explored for immobilization performance of laccase. Meanwhile, the morphology and structure were analyzed. The results show that the immobilized content of laccase by SV-poly(HEMA)-Fe(Ⅲ) reached 132.9 mg/g and the immobilized laccase demonstrates stronger thermal stability(20-70 ℃) and lower sensitivity to pH value(2.0-7.0) compared with free laccase. Immobilized laccase maintains its initial activity more than 55% after 10 repeated uses.

Key words: spunlaced viscose fiber membrane, atom transfer radical polymerization, coordination method, immobilizing enzyme, laccase

CLC Number: 

  • TQ342

Fig.1

Schematic diagram of ATRP grafting process of spunlaced viscose fiber membrane"

Fig.2

SEM images of spunlaced viscose fiber membrane(a), SV-poly(HEMA) (b) and SV-poly(HEMA)-Fe(Ⅲ) (c) (×400)"

Tab.1

Element types and its weight percentages"

样品名称 质量分数/%
C O Br
水刺粘胶纤维膜 44.98 55.02 0.00
引发反应后的水刺粘胶纤维膜 48.48 51.54 0.39

Fig.3

Infrared spectrum of spunlaced viscose fiber membrane and SV-poly(HEMA)"

Fig.4

Immobilization laccase of spunlaced viscose fiber membrane with different modification time"

Fig.5

Relationship of pH (a) and temperature (b) on free and immobilized laccase"

Fig.6

Reusability of immobilized laccase"

Fig.7

Storage stability of free and immobilized laccase"

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