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|Chimie. Cristalografie. Mineralogie (497)|
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TUROV, Volodymyr; BOGATYREV, Viktor; KRUPSKA, Tetyana; GALABURDA, Mariia; LUPASCU, Tudor; POVAR, Igor; KOKOSHA, Natalia. Water binding through polyacrylamide hydrogel and the influence of its preliminary saturation by Enoxil. In: Chemistry Journal of Moldova. 2018, nr. 1(13), pp. 87-94. ISSN 1857-1727.
|Chemistry Journal of Moldova|
|Numărul 1(13) / 2018 / ISSN 1857-1727 /ISSNe 2345-1688|
The state of water in a polyacrylamide gel has been studied by the 1H NMR spectroscopy. It has been shown that water is in a strongly associated state in the form of clusters with radius is in the range of R= 0.6-30 nm. The introduction of chloroform into the gel increases the binding of absorbed water, which indicates the effect of CDCl3 on the structure of water-filled cavities formed by the polymer linkage. Trifluoroacetic acid (TFA) reduces the interaction of the polymer with water, probably due to its binding to nitrogen-containing groups. Even more the interphase energy of water decreases in the presence of Enoxil. This decrease makes it possible to determine the free energy of the interaction of Enoxil- polyacrylamide gels, which is maximal in air and decreases in the presence of CDCl3 and TFA.
Cluster, Enoxil, 1H NMR spectroscopy, polyacrylamide gel, polymer linkage.