caa a22 4500 605490104 CHVBK 20210128100503.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1134/S1061933X1502012X doi (NATIONALLICENCE)springer-10.1134/S1061933X1502012X A study of cryostructuring of a polymer system. 39. Poly(vinyl alcohol) composite cryogels filled with chitosan microparticles [Elektronische Daten] [E. Podorozhko, I. Lunev, A. Ryabev, N. Kil'deeva, V. Lozinsky] Composite macroporous poly(vinyl alcohol) (PVA) cryogels have been prepared by cryogenic treatment (freezing at −20°C for 12 h followed by defrosting at a rate of 0.03°C/min) of dispersions of chitosan particles swollen in an aqueous 120 g/L PVA solution. The elasticity moduli and fusion temperatures have been determined for corresponding samples, and their microstructure has been investigated by optical microscopic examination of their thin sections. The rigidity and heat endurance of the PVA-chitosan composite cryogels have been shown to increase with filler concentration. In addition, the rheological properties of initial dispersions have been studied and the appearance of adhesion contacts between discrete and continuous phases has been revealed already at the stage of dispersion preparation. The optical microscopic investigations of the morphological features of the initial dispersions and the microstructure of the composites have established a relatively uniform distribution of filler particles in the bulk of composite cryogels. It has been shown that chitosan particles incorporated into the matrix of the macroporous PVA cryogel are capable of sorbing heavy metal ions—in particular, bivalent copper ions—from aqueous solutions. Pleiades Publishing, Ltd., 2015 Podorozhko E. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, 119991, Moscow, Russia aut Lunev I. Moscow State University of Design and Technology, ul. Sadovnicheskaya 33/1, 117997, Moscow, Russia aut Ryabev A. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, 119991, Moscow, Russia aut Kil'deeva N. Moscow State University of Design and Technology, ul. Sadovnicheskaya 33/1, 117997, Moscow, Russia aut Lozinsky V. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, 119991, Moscow, Russia aut Colloid Journal Pleiades Publishing 77/2(2015-03-01), 186-195 1061-933X 77:2<186 2015 77 10595 https://doi.org/10.1134/S1061933X1502012X text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061933X1502012X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Podorozhko E. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Lunev I. Moscow State University of Design and Technology, ul. Sadovnicheskaya 33/1, 117997, Moscow, Russia aut NATIONALLICENCE 700 1- Ryabev A. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Kil'deeva N. Moscow State University of Design and Technology, ul. Sadovnicheskaya 33/1, 117997, Moscow, Russia aut NATIONALLICENCE 700 1- Lozinsky V. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, 119991, Moscow, Russia aut NATIONALLICENCE 773 0- Colloid Journal Pleiades Publishing 77/2(2015-03-01), 186-195 1061-933X 77:2<186 2015 77 10595