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Preparation of amidoxime polyacrylonitrile chelating nanofibers for the adsorption of metal ions
LIAO Shiqin 1 #,FENG Quan 2 #,ZHANG Ping 2 #,HUANG Fenglin 2 #,WEI Qufu 2 *
1.Key laboratory of Eco-textiles, Ministry of Education, Jiangnan University, JiangSu WuXi 214122
2.Key laboratory of Eco-textiles, Ministry of Education, Jiangnan University, Wuxi 214122
*Correspondence author
#Submitted by
Subject:
Funding: the Innovation Project of Jiangsu Graduate Education （No.NO. CXLX11_0500）, the Specialized Research Fund for the Doctoral Program of Higher Education （No.NO. 20090093110004）, Central Universities （No.JUSRP11102 and JUSRP20903）
Opened online:21 May 2012
Accepted by: none
Citation: LIAO Shiqin,FENG Quan,ZHANG Ping.Preparation of amidoxime polyacrylonitrile chelating nanofibers for the adsorption of metal ions[OL]. [21 May 2012] http://en.paper.edu.cn/en_releasepaper/content/4478529
 
 
In this paper, polyacrylonitrile (PAN) nanofibers were prepared by electrospinning and they were modified with hydroxylamine to synthesize amidoxime polyacrylonitrile (AOPAN) chelating nanofibers, which were further applied to adsorb copper and iron ions. The conversion rate of nitrile groups in PAN was calculated by the gravimetric method. The structure and surface morphology of AOPAN nanofibers were characterized by a Fourier transform infrared spectrometer (FTIR) and a scanning electron microscope (SEM), respectively. The adsorption capabilities of Cu2+ and Fe3+ ions onto the AOPAN nanofiber mats were evaluated. FT-IR spectra indicated that nitrile groups in PAN were partly converted into amidoxime groups. SEM examination revealed that there were no any serious cracks or sign of degradation on the surface of PAN nanofibers after chemical modification. The adsorption capacities of both copper and iron ions onto the AOPAN nanofiber mats were much higher than those onto the raw PAN nanofiber mats. The adsorption data of Cu2+ and Fe3+ ions were fitted particularly well with the Langmuir isotherm. The maximal adsorption capacities of Cu2+ and Fe3+ ions reached 215.18 and 221.37 mg/g, respectively.
Keywords:polyacrylonitrile; electrospinning; adsorption
 
 
 

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