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Preparation and Adsorption Properties of Polyvinyl Alcohol Polyacrylamide Interpenetrating Polymer Network Hydrogel
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ZU Guojing1,LU Hehuan2,WU Lishun3,TONG Qingsong1
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Abstract
An interpenetrating polymer network (IPN) hydrogel was prepared by using polyvinyl alcohol (PVA), polyacrylamide (PAM) as raw materials and glutaraldehyde as cross-linking agent. The structure of the IPN was characterized by Fourier transform infrared spectroscopy. The effect of PAM content, the amount of cross-linking agent, adsorption time, pH and adsorption temperature on swelling degree and Cu2+ adsorption properties of IPN hydrogel were studied. The Cu2+ adsorption kinetic characteristics of the IPN and the adsorption mechanism were investigated. The results showed that the 30wt.% PAM IPN had better Cu2+ adsorption property than PVA hydrogel when the pH was 5. The equilibrium adsorption amount of Cu2+ on PVA-PAM IPN hydrogel increased with the increase of temperature. The adsorption behavior was consistent with the pseudo-first-order and pseudo-second-order kinetic equations, and the mechanism diffusion was controlled by particle and film diffusions.
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Published: 07 March 2020
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