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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of Redox Fibers Containing Hydroxy-Alkyl Amino Groups and Their Adsorptive Properties Toward Au(III)
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Preparation of Redox Fibers Containing Hydroxy-Alkyl Amino Groups and Their Adsorptive Properties Toward Au(III)

机译：含羟基烷基氨基的氧化还原纤维的制备及其对Au（III）的吸附性能

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摘要

Three kinds of redox fibers (fibers II, III, and IV) are prepared by amination of the reactive chloromethylated poly (vinyl acetate) grafting polystyrene-divinylbenzene fiber (fiber I) with diethanolamine, ethanolamine, or triethanolamine. The N-content of the fibers is 2.26, 2.71, and 1.86 mmol g~(-1), respectively. Results of static adsroption experiments show that the adsorption amount of fibers II, III, and IV toward Au(III) reaches 550 mg g~(-1), 620 mg g~((-1), and 409 mg g~(-1), respectively, between pH 2.0 and pH3.0. Some adsorbed Au(III) can be reduced to Au(O). The reduction perdcentage of Au(III) adsorbed by fiber II increases with rising pH value of the solution and can be as high as 87% at pH 5.0. The amount of Au(III) adsorbed by fiber II increases with solution temperature, but decreases with ionic strength of the solution. The adsorption amount of fibers II and III toward Au(III) is less in ethanol or in acetacetate medium than in water. Kinetic adsroption data indicates that 50 min is needed for fiber II to adsorb half of its saturate adsorption amount of Au(III). It was proved by elemental analysis, infrared spectroscopy, nuclear magnetic resonance, and electron spectroscopy for chemical analysis determinations that the carbon atoms connecting with the hydroxy groups near the nitrogen atoms were easily oxidized into carbonyl ones during redox adsorption reaction of fibers II, III, and IV with Au(III). Some grains of gold adsrobed on fiber II were discovered under scanning electron microscopy.
机译：三种氧化还原纤维（纤维II，III和IV）是通过用二乙醇胺，乙醇胺或三乙醇胺胺化反应性的氯甲基化聚乙酸乙烯酯接枝聚苯乙烯-二乙烯基苯纤维（纤维I）而制备的。纤维的N含量分别为2.26、2.71和1.86mmol g·（-1）。静态吸附实验结果表明，纤维II，III和IV对Au（III）的吸附量分别为550 mg g〜（-1），620 mg g〜（（-1）和409 mg g〜（-）。 1）分别在pH 2.0和pH3.0之间，一些吸附的Au（III）可以还原为Au（O）。纤维II吸附的Au（III）的还原百分率随溶液pH值的升高而增加在pH 5.0时高达87％，纤维II的Au（III）吸附量随溶液温度的增加而增加，但随着溶液离子强度的增加而降低，纤维II和III对Au（III）的吸附量较小动力学吸附数据表明，纤维II吸附其饱和吸附量Au（III）的一半需要50分钟，这通过元素分析，红外光谱，核磁共振，和电子光谱法进行化学分析，以确定碳原子与硝基附近的羟基连接纤维II，III和IV与Au​​（III）的氧化还原吸附反应过程中，氢原子容易氧化成羰基原子。在扫描电子显微镜下发现了纤维II上吸附的一些金颗粒。

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