Department of Chemistry, University of Navarra, 31080 Pamplona, Spain.
Department of Chemistry, University of Navarra, 31080 Pamplona, Spain.
Int J Biol Macromol. 2021 Jun 1;180:570-577. doi: 10.1016/j.ijbiomac.2021.03.098. Epub 2021 Mar 19.
Three different polysaccharides, xanthan gum, chitosan and locust bean gum, were crosslinked with or without β-cyclodextrin, using citric acid in different ratios, to create 'green' hydrogel matrices. The crosslinking of these polysaccharides was produced through an inexpensive and innocuous solvent-free synthesis process. A favorable swelling behavior of the hydrophilic matrices facilitates the sorption of the solutes tested. Interestingly, the amount of β-cyclodextrin groups is not the only factor to yield the best sorption capability for hydrophobic model molecules: polysaccharides themselves also influence the sorption depending on their characteristic functional groups, the conformation of their chains and, as mentioned above, their degrees of swelling. In order to ascertain the effect of the polysaccharides on the sorption capabilities of a model sorbate (1-naphthol), isotherms using a wide range of solute concentrations were analyzed, and the Hill equation yielded the best fitting results and provided some insight into the mechanisms of interaction.
三种不同的多糖（黄原胶、壳聚糖和刺槐豆胶），通过使用不同比例的柠檬酸，与β-环糊精交联或不交联，以创建“绿色”水凝胶基质。这些多糖的交联是通过一种廉价且无毒的无溶剂合成工艺产生的。亲水性基质具有良好的溶胀行为，有利于吸附所测试的溶质。有趣的是，β-环糊精基团的数量并不是获得对疏水分子最佳吸附能力的唯一因素：多糖本身也会根据其特征官能团、链构象以及如前所述的溶胀程度影响吸附。为了确定多糖对模型吸附剂（1-萘酚）吸附能力的影响，使用广泛的溶质浓度进行了吸附等温线分析，Hill 方程得出了最佳拟合结果，并提供了一些关于相互作用机制的见解。
