Synthesis of Clay Composites of Polyacrylamide and Poly-2-Hydroxyethylacrylate and Sorbtion Ability in the Case of Cetylpyridinium Bromide

Abstract

<p>By the three-dimensional polymerization of nonionic (polyhydroxyethylacrylate and polyacrylamide) <br />polymers and bentonite clay from Manyrak deposit (East Kazakhstan Region) and with using of process <br />preliminary intercalation of monomers in an aqueous suspension of bentonite (polymerization in situ) the <br />chemically crosslinked composite gels were synthesized. Optimal conditions of synthesis and physical-chemical properties of composition gels were established. It was shown, that yield of gel fraction increases <br />with increasing contents of bentonite clay. Insignificant adding of negative charged particles of bentonite clay <br />gives to polymer gels of nonionic type polyelectrolyte character, that comes out in decreasing of swelling <br />degree of gels under effect of ionic strength. By using physical and chemical methods of research: equilibrium <br />swelling, IR spectroscopy, scanning electron microscope (SEM), sorption-desorption, etc. were shown the <br />formation of compatible, homogeneous, swelling in water polyelectrolyte gels formed via hydrogen bonds <br />between the components of the gel, stabilized by hydrophobic interactions of the organic polymer chains. <br />The possibility of the regulation of swelling ability of the composite gels through varying of the outside and <br />inside factors as: consist of the composition, conditions of intercalation, pH of the environment, temperature <br />and ionic strength was established, that is stimulus sensitivity of gels. The sorbtion capacity of polymer-clay composites in attitude surface active substance cetylpyridinium bromide were estimated. Increasing of <br />temperature of environment and content of bentonite clay in composite promotes the process of sorbtion <br />of surface-active substances. Considerably high sorption capacity of polymer clay composition based on <br />more hydrophilic polymer – polyacrylamide was established. By the results of investigations one may, that <br />synthesized polymer clay composites after suitable investigations can be recommend as sorbents of cationic <br />surface active substances.</p>

Composite Polymer-Clay Hydrogels Based on Bentonite Clay and Acrylates: Synthesis, Characterization and Swelling Capacity

“…Specificity of the chemical structure and properties of the matrix in PCM, chemistry and technology of production and methods of research allow us to consider the Material science of PCM as a new field, developed based on existing concepts and methods of the polymer science, chemistry and physic of surface, and other sciences [1]. Composite hydrogels are the subject of intensive research as domestic authors [2][3][4], and foreign ones [5][6][7][8]. A lot of scientific review articles and monographs analyzed and generalized the main results of the research in field of composite materials [9][10][11].…”

“…Abilov and M.K. Beisebekov [2,[20][21][22] make attempts to create gel and film polymer and composite forms as carriers of domestic medicinal substances -alchidine, rihlokain, sorbents of ions of heavy metals and surface-active substances. As polymeric systems such polymers are used: natural -gelatin, agar, synthetic -polyacrylic and polymethacrylic acids (PAA, PMAA), polyacrylamide (PAA), poly2-hydroxyethyl acrylate (PHEA), polyvinyl alcohol (PVA), etc.…”