Preparation of composites of laponite with alginate and alginic acid polysaccharides

作者：Bandeira Lucimara C; Calefi Paulo S; Ciuffi Katia J; de Faria Emerson H; Nassar Eduardo J^*; Vicente Miguel A; Trujillano Raquel

来源：Polymer International, 2012, 61(7): 1170-1176.

DOI：10.1002/pi.4196

• laponite
• 3-aminopropyltriethoxysilane
• alginate polysaccharide
• alginic acid polysaccharide
• clay-organic composites

Polymer/clay composites have several uses in fields such as engineering, agriculture, ceramics, surface coatings, absorbent materials, pharmaceuticals or catalysis. Polysaccharides, such as alginate and its acid derivatives, are biocompatible and biodegradable polymers, effective in the production of adsorbent systems, for encapsulation and controlled release of active ingredients such as drugs and fertilizers. In this work, alginate polysaccharide and alginic acid were used to form composites with laponite, both with the original clay or with clay previously functionalized with 3-aminopropyltriethoxysilane. The properties of the composites prepared from laponite or functionalized laponite and alginic acid or alginate were compared. The interaction of laponite with alginic acid leads to composites with strong disorder in the clay structure. In all cases, composites with high contents of polysaccharides, with good thermal and mechanical properties, are obtained. Laponite-derived composites showed high adsorption capability for Cr(III) and methylene blue from aqueous medium.

• 出版日期2012-7