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Molecular structure and ion exchange of amidoximated cellulosic materials

机译:氨基肟化纤维素材料的分子结构和离子交换

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摘要

Modification of lignocellulosic materials, e.g., cotton stalks, bagasse, and rice straw, by incorporation of amidoxime group for ion exchange is investigated. The uptake of metal ions Cu, Cr, Ni, and Fe by these modified lignocellulosic materials is measured. Amidoximated bagasse has higher efficiency toward metal ions uptake than amidoximated cotton and rice straw. The effect of different variables, e.g., metal ion concentration, temperature of metal ion solution, and time of steeping, on the efficiency of the amidoximated (bagasse raw material, unbleached bagasse, and bleached bagasse) ion exchangers toward metal ions uptake is tested. The molecular structure of the prepared amidoxime from bagasse and its pulps is studied by using infrared spectroscopy. New bands appeared at 1661 and 916 cm(-1) in the spectra of amidoximated bagasse and its pulps ion exchangers due to the formation of C=N and N-OH groups. The thermal properties of these ion exchangers is also studied. (c) 2006 Wiley Periodicals, Inc.
机译:研究了通过掺入a肟基团进行离子交换对木质纤维素材料,例如棉秆,蔗渣和稻草的改性。测量了这些改性的木质纤维素材料对金属离子Cu,Cr,Ni和Fe的吸收。酰胺化的蔗渣比金属化的棉花和稻草具有更高的吸收金属离子的效率。测试了不同变量(例如金属离子浓度,金属离子溶液的温度和浸泡时间)对a肟化(甘蔗渣原料,未漂白甘蔗渣和漂白甘蔗渣)离子交换剂对金属离子吸收效率的影响。通过红外光谱研究了甘蔗渣及其纸浆中制备的mid胺肟的分子结构。由于形成了C = N和N-OH基团,在氨基肟化甘蔗渣及其纸浆离子交换剂的光谱中,新的谱带出现在1661和916 cm(-1)处。还研究了这些离子交换剂的热性质。 (c)2006年Wiley Periodicals,Inc.

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