Hybrid hydrophilic polymer/montmorillonite systems

Abstract

Hybrydowe uk³ady typu polimer hydrofilowy/montmorylonit Streszczenie-Przedstawiono przegl¹d literatury dotycz¹cej hybrydowych uk³adów typu polimer hydrofilowy (kationowy, anionowy lub niejonowy)/montmorylonit (MMT), sposobów ich otrzymywania, metod oceny oraz kierunków zastosowania. Synteza tego typu produktów pozwala na modyfikacjê w³aoeciwooeci u¿ytkowych polimerów. Szczegó³owo scharakteryzowano zawieraj¹ce MMT ma-teria³y hybrydowe na podstawie poliakryloamidu (PAAm), kopolimerów akryloamidu, poliwinylopirolidonu (PVP), poli(kwasu akrylowego) (PAA), poli(tlenku etylenu) (PEO), oligomerów i polimerów glikolu etylenowego, a tak¿e polimeru pochodzenia naturalnego-skrobi. S³owa kluczowe: uk³ady hybrydowe, polimer hydrofilowy, montmorylonit, nanonape³niacz. HYBRID HYDROPHILIC POLYMER / MONTMORILLONITE SYSTEMS Summary-A literature review on hybrid systems consisted of hydrophilic polymer (cationic, anionic or nonionic one) and montmorillonite (MMT, Fig. 1 and 2) is presented. The methods of preparation, evaluation and applications directions are discussed. Preparation of such products let modify the functional properties of polymers. The hybrid systems based on polyacrylamide (PAAm) (Fig. 3-5), acrylamide copolymers, polyvinylpyrrolidone (PVP), poly(acrylic acid) (PAA) (Fig. 6), poly(ethylene oxide) (PEO), oligomers or polymers of ethylene glycol (Fig. 7) or polymer of natural origin-starch, containing montmorillonite were characterized in detail.

Polymer coated magnetite nanoparticles for biomedical applications. Part II. Fe3O4 nanoparticles coated by synthetic polymers

“…Poliwinylopirolidon (PVP), dziêki swoim hydrofilowym w³aoeciwooeciom, pe³ni ró¿norodne funkcje w technologii polimerów -jest sk³adnikiem materia³ów hybrydowych [12] oraz kompatybilizatorem w mieszaninach polimerowych [13].…”

Archives of Foundry Engineering

“…In addition, the presence of interlayer aqueous spaces causes that -apart from the surface adsorption -MMT is able to absorb water particles, which is displayed by swelling (changes of cross-linking intervals) [10][11][12]. Lamellar aluminosilicates as inorganic nanofillers found applications in synthesis of materials, of flocculent properties such as (co)polymer acrylamide/montmorillonite [13]. Such copolymers can be obtained by the heterophasal polymerisation method of the type: water in oil in the presence of MMT particles [13,14].…”

“…Lamellar aluminosilicates as inorganic nanofillers found applications in synthesis of materials, of flocculent properties such as (co)polymer acrylamide/montmorillonite [13]. Such copolymers can be obtained by the heterophasal polymerisation method of the type: water in oil in the presence of MMT particles [13,14]. It was found, that due to wetting of the acrylamide copolymer (PAAm) chain with a particle/particles of inorganic filler the flocculation efficiency of the hybrid increases.…”

“…toluene from the aqueous environment. The method of obtaining hybrid materials of the starch/montmorillonite type in a form of thin polymer foils for packing food-stuffs, was also developed [13]. Organically modified aluminosilicates constitute the interesting group of organic-inorganic hybrid materials, on account of their potentially wide application in synthesis of polymer nanocomposites and as modifiers of rheological properties of paints, inks and cosmetics as well as absorbers of toxic gases or medicine carriers [13,[15][16][17].…”

Effect of Layer Charge on the Formation of Polymer/Layered Silicate Nanocomposites: Intercalation of Polystyrene

“…Polymer intercalation into layered inorganic compounds provides an opportunity for the preparation of polymer nanocomposites. , Various layered silicates (montmorillonite, hectorite, mica) have been used for this purpose . In some cases composites exhibited unique properties, which were superior to the parameters of pure polymers. − Worthy of mention are increased tensile strength, heat resistance, − changes of rheology properties, − and reduced gas permeability. − The intercalation of polymers soluble in water is possible from aqueous colloids or by melt intercalation using unmodified silicates. − Composites of less polar, hydrophobic polymers cannot be prepared in the same way, but a chemical modification of layered silicates has to be applied to change the surface properties of the inorganic component. Alkylammonium (AA) cations with long alkyl chains convert hydrophilic layered silicates into materials with organophilic properties, also called “organoclays”. , The miscibility of the components and the properties of the composites depend on the properties of both the organoclay and polymer .…”