STUDY OF THE INTERACTION OF Β-CYCLODEXTRIN WITH CROSS-LINKING AGENTS OF DIFFERENT FUNCTIONALITY
DOI:
https://doi.org/10.35546/kntu2078-4481.2024.4.25Keywords:
β-cyclodextrin, cross-linking agents, butyl glycidyl ether, tetraethoxysilane, 3-glycidoxypropyltrimethoxysilane, water absorption, hydrolysis, swelling degreeAbstract
The paper presents the results of studying the interaction of β-cyclodextrin (β-CD) with cross-linking agents of different functionality, as well as an assessment of the effect of these agents on the physicochemical properties of composite films. Butyl glycidyl ether (GE), tetraethoxysilane (TEOS) and 3-glycidoxypropyltrimethoxysilane (GPTMS) were used as crosslinking agents in concentrations of 10, 15 and 20% of the β-CD weight. Composite films were made from an aqueous β-CD solution by boiling, followed by molding, drying and heat treatment. Based on the study results, it was found that the selected cross-linking agents have different effects on the water absorption indices, hydrolytic stability and swelling degree of the obtained films. GPTMS provides the lowest water absorption values among the studied agents, especially after heat treatment. The introduction of TEOS in concentrations of 10 and 15% allows achieving maximum indices of hydrolytic resistance of films. Films from GE show a tendency to increased water absorption. According to the results of swelling degree assessment, it was found that GPTMS promotes the formation of the most cross-linked structure of β-CD films, probably due to the presence of two functional groups that interact more actively with the matrix. This agent shows a stable increase in the mass of samples even after 96 hours of contact with water, unlike other agents. The results of the study showed that the use of cross-linking agents can significantly improve the performance properties of films based on β-CD. GPTMS and TEOS turned out to be the most promising agents for creating hydrolysisresistant composite coatings.
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