Synthesis and optimization of colloidal silica nanoparticles and their functionalization with methacrylic acid

Autor(es)

Arantes, Tatiane M. ^[1] ; Pinto, Alexandre H. ^[1] ; Leite, Edson R. ^[1] ; Longo, Elson ^[2] ; Camargo, Emerson R. ^[1]

Afiliação do(s) autor(es)

^[1] UFSCar Fed Univ Sao Carlos, Dept Chem, LIEC, BR-13565905 Sao Carlos, SP - Brazil

^[2] UNESP Sao Paulo State Univ, Dept Biochem & Technol Chem, Chem Inst Araraquara, LIEC IQ, BR-14801907 Araraquara - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS; v. 415, p. 209-217, DEC 5 2012.
• Citações Web of Science: 14

Resumo

The synthesis of colloidal SiO2 nanoparticles was achieved via the base-catalyzed hydrolysis and polycondensation of tetraethyl orthosilicate (TEOS) in an alcoholic medium with the careful variation of the concentrations of water, ammonia and TEOS. In this study, we investigated the influence of experimental parameters on the average size of nanoparticles by means of a multivariate statistical analysis using a factorial design to create one model to predict particle size in function of experimental conditions. This model predicted that it is possible to synthesize silica nanoparticles with size in the range from 17 to 333 nm, according to the chosen condition for the amount of water, ammonia and TEOS. It was observed that only the molar amount of NH3, the molar amount of H2O and the effect from interaction between molar amount of TEOS and H2O were significant. Subsequently, surface modification of the colloidal silica was performed in situ using the coupling agent 3(trimethoxysilyl)propyl methacrylate (TMSPM). (c) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 10/13735-0 - Síntese de nanopartículas semicondutoras de ZnSe com superfície hidrofílica através de método baseado na Química Verde
• Beneficiário: Alexandre Henrique Pinto
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 08/09697-6 - Modificação das propriedades dos polímeros comerciais de SBR e NBR a partir da incorporação de nanopartículas sintéticas funcionalizadas
• Beneficiário: Tatiane Moraes Arantes
• Modalidade de apoio: Bolsas no Brasil - Doutorado