Preparation and characterization of new organoclays using natural amino acids and Cloisite Na+

Phosphorylated Cashew Nut Shell Liquid prepolymer modified kaolin as a reinforcing filler for natural rubber

“…A recent study by Preetha Nair and Joseph (2012) on the reinforcement effect of unmodified and vinyl silane modified kaolins in NBR shows improved mechanical properties and thermal stability of the vulcanizates at concentrations of the fillers up to 15 phr. A variety of long chain organomodifiers such as quaternary ammonium salts and polyethylene glycol have been used for the preparation of organoclays, most of which are based on petrochemical sources that are depleting rapidly (Betega de Paiva et al, 2008;He et al, 2010;Zampori et al, 2010;Mallakpour and Dinari, 2011;Rooj et al, 2012). Reports on the use of low cost renewable natural resource based organo-modifiers for clays are rather scanty.…”

Modification of Clay with L-Leucine and TiO2 with Silane Coupling Agent for Preparation of Poly(Vinyl Alcohol)/Organo-Nanoclay/Modified TiO2 Nanocomposites Film

“…Organo-modified Cloisite Na + (OMMT) was obtained after the Cloisite Na + was treated with protonated L-leucine through an ion-exchange process [41]. The required amount of L-leucine was protonated with a designated amount of concentrated HCl and then Cloisite Na + was dispersed in deionized water.…”

“…These cations are often alkylammonium surfactants, that are toxic. Modification of Cloisite Na + MMT with the protonated form of natural amino acids such as L-alanine, L-valine, L-leucine, L-isoleucine, L-phenylalanine and L-methionine was reported [41]. In this study, Cloisite Na + and the protonated form of L-leucine was used for the preparation of the organoclay through a cation-exchange method via a safe and environmentfriendly process.…”

Preparation and characterization of hybrid materials consisting of high-energy ground montmorillonite and α-amino acids

“…The surface of montmorillonite can be modified with organic surfactants for example amines, ammonium salts, amino acids, etc., in order to prepare novel nanocomposites (de Paiva et al, 2008). Amino acids as biosurfactants have advantage of low toxicity, biodegradability, antimicrobial and antifungal activity, and various possible structures (Mallakpour and Dinari, 2011;Pérez et al, 2014).…”

“…Many studies on the adsorption of amino acids on montmorillonite were published lately (Naidja and Huang, 1994;Brigatti et al, 1999;Benincasa et al, 2000;Kollár et al, 2003;Benetoli et al, 2007;Han et al, 2007;Parbhakar et al, 2007;Mallakpour and Dinari, 2011;Ramos and Huertas, 2013). The results suggest that the structure and properties of prepared organoclays are influenced also by the charge of the amino acid side-chain (R) and the structure of the used montmorillonite.…”