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首页> 外文期刊>Adsorption Science & Technology >Ion Capacity of Siliceous Sorbents with Surface Polymer Layers Composed of Different Dextran-Triethylenetetraamine Mixtures (Ion Capacity of Sorbents with Surface Polymer Layers)
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Ion Capacity of Siliceous Sorbents with Surface Polymer Layers Composed of Different Dextran-Triethylenetetraamine Mixtures (Ion Capacity of Sorbents with Surface Polymer Layers)

机译:具有不同葡聚糖-三亚乙基四胺混合物的表面聚合物层的硅质吸附剂的离子容量(具有表面聚合物层的吸附剂的离子容量)

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摘要

The formation of a polymer layer on the surface of a siliceous support employed for chromatography is one of the methods available for protecting the silica skeleton from dissolution in the mobile alkaline phase and for eliminating the negative influence of silanol groups on separated molecules. A polysaccharide-polyimine copolymer can play the role of the surface layer, especially in siliceous materials, for high performance affinity chromatography. The results presented here demonstrate the utility of the material with such a copolymer layer as a sorbent for metal ions. The ion capacity of sorbents with a copolymer layer composed of triethylenetetraamine-dextran can be changed both by the composition of the mixture and by the amount of crosslinking agent present. The presence of a transition layer on the polymer layer surface explains the distinctions between the ion capacity of sorbents and the concentration of electron-donor nitrogen atoms existing in the material.
机译:在用于色谱法的硅质载体的表面上形成聚合物层是可用于保护二氧化硅骨架免于溶解在流动碱性相中并消除硅烷醇基团对分离的分子的不利影响的方法之一。对于高效亲和色谱法,多糖-聚亚胺共聚物可以发挥表面层的作用,尤其是在硅质材料中。这里给出的结果证明了具有这种共聚物层的材料作为金属离子吸附剂的实用性。具有由三亚乙基四胺-葡聚糖组成的共聚物层的吸附剂的离子容量可以通过混合物的组成和存在的交联剂的量来改变。聚合物层表面上过渡层的存在解释了吸附剂的离子容量与材料中存在的电子给体氮原子浓度之间的区别。

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