N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Nikolsky Avenue 20, Arkhangelsk 163069, Russia.
N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences, Nikolsky Avenue 20, Arkhangelsk 163069, Russia.
Int J Biol Macromol. 2023 Jul 15;243:125309. doi: 10.1016/j.ijbiomac.2023.125309. Epub 2023 Jun 8.
The interaction between linear sodium alginate and branched fucoidan were investigated using viscosity and tensiometric measurements. It was shown that water-soluble interpolymer complex is formed. The alginate-fucoidan complexation is due to the formation of a cooperative system of hydrogen bonds between the ionogenic and hidroxyl groups of sodium alginate and fucoidan and hydrophobic interactions. The intensity of the polysaccharide-polysaccharide interaction increases with an increase in the content of fucoidan in the blend. It was established that alginate and fucoidan are weak surfactants of the associative type. The surface activity of fucoidan was 34.6 mN∙m/mol, and for alginate was 20.7 mN∙m/mol. The resulting alginate-fucoidan interpolymer complex exhibits high surface activity and indicates a synergistic effect of combining two polysaccharides. The values of the activation energy of the viscous flow process were 7.0 kJ∙mol, 16.2 for kJ∙mol and 33.9 kJ∙molfor alginate, fucoidan and their blend, respectively. These studies provide a methodological basis for determining the conditions for preparation of homogeneous film materials with a certain complex of physico-chemical and mechanical properties.
采用粘度和界面张力测量法研究了线性海藻酸钠和支链褐藻糖胶之间的相互作用。结果表明，形成了水溶性的聚合物相互作用复合物。海藻酸钠-褐藻糖胶的络合作用归因于海藻酸钠和褐藻糖胶的离子化和羟基基团之间形成氢键的协同体系以及疏水相互作用。多糖-多糖相互作用的强度随共混物中褐藻糖胶含量的增加而增加。结果表明，海藻酸钠和褐藻糖胶是具有缔合型的弱表面活性剂。褐藻糖胶的表面活性为 34.6 mN∙m/mol，而海藻酸钠的表面活性为 20.7 mN∙m/mol。所得的海藻酸钠-褐藻糖胶互聚物复合物具有高表面活性，并显示出两种多糖结合的协同效应。粘流过程的活化能值分别为 7.0 kJ∙mol、16.2 kJ∙mol 和 33.9 kJ∙mol，分别为海藻酸钠、褐藻糖胶及其共混物。这些研究为确定具有一定物理化学和机械性能复合物的均匀膜材料的制备条件提供了方法学基础。
