树枝状大分子
乙烯醇
材料科学
自愈水凝胶
聚酰胺
肿胀 的
吸附
化学工程
丙烯酸
高分子化学
聚合物
复合材料
有机化学
化学
共聚物
工程类
作者
Asma Abdalgader,Wael Elhrari,Ali Elejmi
标识
DOI:10.1007/s10924-023-02963-2
摘要
Polyamide dendrimers, poly(vinyl alcohol) (PVA), and poly(acrylic acid) (PAA) were heat-treated for hydrogels films preparation. The effect of the dendrimers periphery type (OH, NH2), dendrimers content, and generation number on the properties of the hydrogels and adsorption performance at different pHs have been examined. Chemically bonded dendrimers into the hydrogel showed a high swelling ratio and high gel content compared to a neat film of PVA/PAA. The incorporation of dendrimers increases the swelling ability of the hydrogel. The highest swelling obtained was at low dendrimers content and high generation numbers G3-OH and G3-NH2. The diffusion of water within the hydrogel follows the Fickian character. Combining the polyamide dendrimers into the hydrogel films showed potential use in metal chelating and the adsorption of Ni2+, Zn2+, Fe2+, and Cu2+ ions onto the hydrogel. The adsorption results have shown dependency on pH, generation number, and dendrimers content. The adsorption increases at pH 6, high generation number, and high dendrimers content regardless of the periphery. The hydrogel containing G3-OH had high swelling and metal ion adsorption.
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