Influence of trehalose additives on the properties of poly(vinyl alcohol) cryogels formed in aqueous as well as in organic media

Fourth interdisciplinary scientific forum with international participation "New materials and promising technologies"

Kolosova, O.Y.^1 ; Lozinsky, V.I.^1

A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia^1

关键词: Additive concentrations;    Aqueous medium;    Frozen state;    Gel formation;    Heat endurance;    Non-covalent;    Organic media;    Physico mechanical characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/525/1/012024/pdf
DOI  :  10.1088/1757-899X/525/1/012024

来源: IOP

【 摘 要 】

Physical (non-covalent) macroporous cryogels of poly(vinyl alcohol) (PVACGs) are formed as a result of the consecutive freezing of concentrated PVA solutions, their incubation in a frozen state and then thawing. In this study the influence of the additives of trehalose and the solvent used on the PVA cryotropic gel-formation, as well as on the properties of the respective PVACGs was explored. It was shown that both the rigidity and the heat endurance of cryogels formed in the DMSO medium in the presence of trehalose progressively increased with increasing the additive concentration. It turns, in the case of cryogels prepared in the aqueous medium in the presence of trehalose the dependences of the physicomechanical characteristics on the additive concentration were of a bell-like (concave) type, while the heat endurance of the samples grew monotonically.