期刊
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
卷 91, 期 8, 页码 1580-1585出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036024417080064
关键词
sodium alginate; chitosan; interpolyelectrolyte complex; dispersion systems
资金
- Federal Agency for Scientific Organizations (FASO Russia) [0410-2014-0029]
- RF Ministry of Education and Science
- shared resource center of the non-commercial organization Critical Technologies for the Environmental Security of the Arctic Region
Aspects of the formation of gels of interpolyelectrolyte complexes (IPECs) based on sodium alginate (NaAlg) and chitosan are studied. The effect the conditions of synthesis and complex composition have on the morphological structure and functional properties of these complexes is examined. It is established that complexation in this system proceeds according to a mechanism of electrostatic interaction between the oppositely charged carboxylic groups of the L-hyaluronic acid pyranose cycles of NaAlg proximal polymer chains and chitosan's amino groups, along with a multitude of hydrogen bonds and dispersion forces. We show that the mechanism of IPEC formation is strongly influenced by the conformational state of a lyophilizing component that is present in the system in excess. The inner surfaces of cryogels based on NaAlg. chitosan IPECs is found to be strongly influenced by the degree of conversion between the parental polyelectrolytes. The most developed mesoporous structure is obtained when a denser gel forms in the system.
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