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利用过硫酸铵作为氧化剂,在壳聚糖(Chi)中用对苯二胺(PPPDA)原位化学氧化聚合反应制备聚(对苯二胺)/壳聚糖复合材料。在添加铜前后,利用FT-IR光谱和SEM表征对苯二胺和对苯二胺/壳聚糖复合材料。利用振荡吸附法,采用1 g/L对苯二胺和对苯二胺/壳聚糖复合材料,在PPPDA和PPPDA/Chi复合材料的pH分别为5.0和6.0的条件下,吸附360 min,可以得到最大的铜去除量。PPPDA显示最大吸附量为650 mg/g,而复合材料的吸附量达到573 mg/g。实验数值与Freundlich等温方程和伪二阶动力学模型吻合良好。含铜的对苯二胺及其复合材料可以被有效地再利用4个循环。相对于无吸附的状态,吸附获得的铜具有高的革兰氏阳性和革兰氏阴性菌抑菌效果。
Poly (p-phenylenediamine) / chitosan composites were prepared by in situ chemical oxidative polymerization of p-phenylenediamine (PPPDA) in chitosan using ammonium persulfate as oxidant. The phenylenediamine and para-phenylenediamine / chitosan composites were characterized by FT-IR spectroscopy and SEM before and after copper addition. Using the method of oscillatory adsorption, using 1 g / L p-phenylenediamine and p-phenylenediamine / chitosan composite materials, the adsorption of PPPDA and PPPDA / Chi composite materials at pH 5.0 and 6.0 for 360 min, respectively, Get the maximum copper removal. PPPDA showed a maximum adsorption capacity of 650 mg / g, while the composite adsorbed capacity reached 573 mg / g. The experimental data agree well with Freundlich isotherm equation and pseudo second-order kinetic model. Copper-containing p-phenylenediamine and its composites can be efficiently reused for 4 cycles. Copper obtained by adsorption has high Gram-positive and Gram-negative bacteriostasis relative to the non-adsorbed state.