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首页> 外文期刊>Journal of Applied Polymer Science >Design of renewable poly(amidoamine)/hemicellulose hydrogels for heavy metal adsorption
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Design of renewable poly(amidoamine)/hemicellulose hydrogels for heavy metal adsorption

机译：用于重金属吸附的可再生聚（酰胺基胺）/半纤维素水凝胶的设计

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Renewable poly(amidoamine)/hemicellulose hydrogels were prepared from O-acetylated galactoglucomannan (AcGGM)-rich biomass and shown to display a significantly high adsorption capacity for Cu2+, Cd2+, Pb-2+,Pb- Zn2+, Ni2+, Co2+, and . Two different acrylamido end-capped poly(amidoamine) oligomers (PAA) were prepared and covalently immobilized onto an in situ formed polysaccharide network via water-based free radical graft copolymerization and cross-linking. The synthetic approach was shown to be viable when using a highly purified AcGGM or a crude spruce hydrolysate, an AcGGM and lignin containing biomass fraction as a reactant. Homogeneous reaction mixtures were obtained in both cases with polysaccharide contents up to 20% by weight. Oscillatory shear measurements indicated a predominantly solid-like behavior of the hydrogels with an increase in shear storage modulus with increasing cross-link density. The mechanical integrity of the PAA/hemicellulose hydrogels showed higher water swelling capacity and less fragility than the parent PAA hydrogels and they retained the heavy metal ion absorption ability of the PAA component, even in the presence of the least purified hemicellulose fraction. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41695.
机译：由富含O-乙酰化的半乳葡甘露聚糖（AcGGM）的生物质制备可再生的聚（酰胺基胺）/半纤维素水凝胶，并显示出对Cu2 +，Cd2 +，Pb-2 +，Pb-Zn2 +，Ni2 +，Co2 +和的明显高吸附能力。制备了两种不同的丙烯酰胺基封端的聚（酰胺基胺）低聚物（PAA），并通过水基自由基接枝共聚和交联共价固定在原位形成的多糖网络上。当使用高度纯化的AcGGM或粗制云杉水解产物，AcGGM和含木质素的生物质馏分作为反应物时，合成方法被证明是可行的。在两种情况下均获得均质反应混合物，其多糖含量最高为20重量％。振荡剪切测量表明水凝胶的主要为固体状行为，其剪切储能模量随交联密度的增加而增加。与母体PAA水凝胶相比，PAA /半纤维素水凝胶的机械完整性显示出更高的水溶胀能力和较小的脆性，并且即使在最不纯的半纤维素馏分存在的情况下，它们仍保留了PAA组分的重金属离子吸收能力。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41695。

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