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首页> 美国卫生研究院文献>Materials >Preparation of Amidoxime Polyacrylonitrile Chelating Nanofibers and Their Application for Adsorption of Metal Ions
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Preparation of Amidoxime Polyacrylonitrile Chelating Nanofibers and Their Application for Adsorption of Metal Ions

机译：mid胺肟聚丙烯腈螯合纳米纤维的制备及其在金属离子吸附中的应用

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摘要

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 Cu2+ and Fe3+ 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 Cu2+ and Fe3+ ions fitted particularly well with the Langmuir isotherm. The maximal adsorption capacities of Cu2+ and Fe3+ ions were 215.18 and 221.37 mg/g, respectively.
机译：通过静电纺丝法制备聚丙烯腈（PAN）纳米纤维，并用羟胺对其进行改性，以合成mid胺肟聚丙烯腈（AOPAN）螯合纳米纤维，并用于吸附铜离子和铁离子。用重量分析法计算PAN中腈基的转化率。分别通过傅立叶变换红外光谱仪（FT-IR）和扫描电子显微镜（SEM）表征了AOPAN纳米纤维的结构和表面形态。评价了Cu 2 + 和Fe 3 + 离子在AOPAN纳米纤维垫上的吸附能力。红外光谱表明，PAN中的腈基部分转化为converted肟基。 SEM检查表明，经过化学修饰后，PAN纳米纤维表面没有严重的裂纹或降解迹象。铜和铁离子在AOPAN纳米纤维垫上的吸附能力均高于未加工的PAN纳米纤维垫。 Cu 2 + 和Fe 3 + 离子的吸附数据与Langmuir等温线特别吻合。 Cu 2 + 和Fe 3 + 离子的最大吸附量分别为215.18和221.37 mg / g。

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