NDLI: Preparation of amidoxime-modified polyacrylonitrile nanofibers immobilized with laccase for dye degradation

Content Provider	Springer Nature Link
Author	Zhang, Ping Wang, Qingqing Zhang, Jinning Li, Guohui Wei, Qufu
Copyright Year	2014
Abstract	A novel approach to preparing multifunctional composite nanofibrous membrane was developed. Polyacrylonitrile (PAN) nanofibrous membrane was fabricated by electrospinning and then the nitrile groups in PAN copolymer was chemically modified to obtain amidoxime modified PAN (AOPAN) nanofiber membrane which was further used as a functional support for laccase immobilization. During the process of reactive dye degradation catalyzed by the AOPAN nanofiber membrane immobilized with laccase, metal ion adsorption occurred at the same time. The chemical modification was confirmed by Fourier transform spectroscopy (FTIR). Scanning electron microscope (SEM) was employed to investigate the surface morphologies of the electrospun nanofibers before and after laccase immobilization. The effects of environmental factors on laccase activity were studied in detail. It was found that the optimum pH and temperature for the activity of immobilized laccase was 3.5 and 50 °C. The relative activity retention of the immobilized laccase decreased dramatically during the initial four repeated uses. After 20 days’ storage, the activity retention of immobilized laccase was still high above 60 %. It has also proved that laccase immobilized on AOPAN nanofiber membrane performed well in dye degradation and metal ion adsorption.
Starting Page	30
Ending Page	34
Page Count	5
File Format	PDF
ISSN	12299197
Journal	Fibers and Polymers
Volume Number	15
Issue Number	1
e-ISSN	18750052
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Amidoxime polyacrylonitrile Nanofibers Laccase Metal ion Adsorption Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Polymers and Plastics

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