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Dispersibility and hydrophobicity analysis of titanium dioxide nanoparticles grafted with silane coupling agent / Chaoxia Wang in Industrial & engineering chemistry research, Vol. 50 N° 21 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11930-11934 Titre : Dispersibility and hydrophobicity analysis of titanium dioxide nanoparticles grafted with silane coupling agent Type de document : texte imprimé Auteurs : Chaoxia Wang, Auteur ; Haiyan Mao, Auteur ; Chunxia Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 11930-11934 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Coupling  agent  Nanoparticle  Hydrophobicity Résumé : The high surface energy of TiO2 nanoparticulate leads to the aggregation of nanoparticles. The grafted modification of nanoparticles is necessary in order to improve its dispersibility in the organic solvent. The effect of grafted modification with silane coupling agent on dispersibility and lipophilicity of TiO2 nanoparticles was investigated. The factors of the modification were discussed, such as the amount of silane coupling agent, pH value, and reaction time. The average sizes of the TiO2 nanoparticles were 200-300 nm. The thermogravimetric analysis (TGA) curves indicated that the TiO2 nanoparticle surface had been grafted with the silane coupling agent. The zeta potential showed that modified TiO2 could disperse well in the organic solvent. The lipophilic degree and contact angle suggested that the modified TiO2 had low surface energy and changed from a hydrophilic nature to a lipophilic nature. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697510 [article] Dispersibility and hydrophobicity analysis of titanium dioxide nanoparticles grafted with silane coupling agent [texte imprimé] / Chaoxia Wang, Auteur ; Haiyan Mao, Auteur ; Chunxia Wang, Auteur . - 2011 . - pp. 11930-11934. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 21 (Novembre 2011) . - pp. 11930-11934 Mots-clés : Coupling  agent  Nanoparticle  Hydrophobicity Résumé : The high surface energy of TiO2 nanoparticulate leads to the aggregation of nanoparticles. The grafted modification of nanoparticles is necessary in order to improve its dispersibility in the organic solvent. The effect of grafted modification with silane coupling agent on dispersibility and lipophilicity of TiO2 nanoparticles was investigated. The factors of the modification were discussed, such as the amount of silane coupling agent, pH value, and reaction time. The average sizes of the TiO2 nanoparticles were 200-300 nm. The thermogravimetric analysis (TGA) curves indicated that the TiO2 nanoparticle surface had been grafted with the silane coupling agent. The zeta potential showed that modified TiO2 could disperse well in the organic solvent. The lipophilic degree and contact angle suggested that the modified TiO2 had low surface energy and changed from a hydrophilic nature to a lipophilic nature. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24697510