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Modeling of dye uptake rate, related interactions, and binding energy estimation in leather matrix using protein based nanoparticle polymer / James Kanagaraj in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12400–12408 Titre : Modeling of dye uptake rate, related interactions, and binding energy estimation in leather matrix using protein based nanoparticle polymer Type de document : texte imprimé Auteurs : James Kanagaraj, Auteur ; Rames Chandra Panda, Auteur Année de publication : 2012 Article en page(s) : pp. 12400–12408 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nanoparticle  Uptake  Dyes  Modeling Résumé : A nanoparticle polymer (NPP) is prepared from amino acids of keratin hydrolysate, obtained after enzymatic degradation. The NPP copolymer chain is made up of two types of monomers, viz. an acrylic ester and an amino acid derivative of keratin hydrolysate. NPP was synthesized using microemulsion polymerization method. The developed NPP exhibits narrow particle size distribution with particle size of 60 nm. The NPP is a free-flowing liquid with flow characteristics almost similar to water, as shown from its low relative viscosity (ηr) of 1.02 at 25 °C. The zeta potential of NPP at -30.2 mV demonstrates anionic nature of the copolymer particle and this may be provided from amino acid derived monomer. The NPP possesses a high molecular weight copolymer in aqueous medium and carboxyl groups as an active site for interaction. The dyeing process carried out after the treatment of NPP enhanced dye uptake. From PM6 semi empirical quantum mechanical level; the interaction of NPP with dye showed four reactive sites. The geometries of the reactive sites were found out. The results showed that binding energies of site 2 and 3 were higher in comparison with those of 1 and 4. The kinetics and color measurement study showed that dye uptake was enhanced by using NPP. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745712 [article] Modeling of dye uptake rate, related interactions, and binding energy estimation in leather matrix using protein based nanoparticle polymer [texte imprimé] / James Kanagaraj, Auteur ; Rames Chandra Panda, Auteur . - 2012 . - pp. 12400–12408. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12400–12408 Mots-clés : Nanoparticle  Uptake  Dyes  Modeling Résumé : A nanoparticle polymer (NPP) is prepared from amino acids of keratin hydrolysate, obtained after enzymatic degradation. The NPP copolymer chain is made up of two types of monomers, viz. an acrylic ester and an amino acid derivative of keratin hydrolysate. NPP was synthesized using microemulsion polymerization method. The developed NPP exhibits narrow particle size distribution with particle size of 60 nm. The NPP is a free-flowing liquid with flow characteristics almost similar to water, as shown from its low relative viscosity (ηr) of 1.02 at 25 °C. The zeta potential of NPP at -30.2 mV demonstrates anionic nature of the copolymer particle and this may be provided from amino acid derived monomer. The NPP possesses a high molecular weight copolymer in aqueous medium and carboxyl groups as an active site for interaction. The dyeing process carried out after the treatment of NPP enhanced dye uptake. From PM6 semi empirical quantum mechanical level; the interaction of NPP with dye showed four reactive sites. The geometries of the reactive sites were found out. The results showed that binding energies of site 2 and 3 were higher in comparison with those of 1 and 4. The kinetics and color measurement study showed that dye uptake was enhanced by using NPP. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745712