Huang Fenglin, Xu Yunfei, Liao Shiqin, Yang Dawei, Hsieh You-Lo, Wei Qufu
Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China.
University of California Davis, Davis, CA 95616, USA.
Materials (Basel). 2013 Mar 11;6(3):969-980. doi: 10.3390/ma6030969.
Polyacrylonitrile (PAN) nanofibers were prepared by electrospinning and they were modified with hydroxylamine to synthesize amidoxime polyacrylonitrile (AOPAN) chelating nanofibers, which were applied to adsorb copper and iron ions. The conversion of the nitrile group in PAN was calculated by the gravimetric method. The structure and surface morphology of the AOPAN nanofiber were characterized by a Fourier transform infrared spectrometer (FT-IR) and a scanning electron microscope (SEM), respectively. The adsorption abilities of Cu and Fe ions onto the AOPAN nanofiber mats were evaluated. FT-IR spectra showed nitrile groups in the PAN were partly converted into amidoxime groups. SEM examination demonstrated that there were no serious cracks or sign of degradation on the surface of the PAN nanofibers after chemical modification. The adsorption capacities of both copper and iron ions onto the AOPAN nanofiber mats were higher than those into the raw PAN nanofiber mats. The adsorption data of Cu and Fe ions fitted particularly well with the Langmuir isotherm. The maximal adsorption capacities of Cu and Fe ions were 215.18 and 221.37 mg/g, respectively.
通过静电纺丝制备了聚丙烯腈（PAN）纳米纤维，并用羟胺对其进行改性以合成偕胺肟聚丙烯腈（AOPAN）螯合纳米纤维，将其用于吸附铜离子和铁离子。采用重量法计算PAN中腈基的转化率。分别用傅里叶变换红外光谱仪（FT-IR）和扫描电子显微镜（SEM）对AOPAN纳米纤维的结构和表面形貌进行了表征。评估了铜离子和铁离子在AOPAN纳米纤维毡上的吸附能力。FT-IR光谱表明PAN中的腈基部分转化为偕胺肟基团。SEM检查表明，化学改性后PAN纳米纤维表面没有严重的裂纹或降解迹象。铜离子和铁离子在AOPAN纳米纤维毡上的吸附容量均高于在原始PAN纳米纤维毡上的吸附容量。铜离子和铁离子的吸附数据与朗缪尔等温线拟合得特别好。铜离子和铁离子的最大吸附容量分别为215.18和221.37 mg/g。
