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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

AgVO3 nanorods silanized with gamma-MPS: An alternative for effective dispersion of AgVO3 in dental acrylic resins improving the mechanical properties

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de Menezes, Beatriz Rossi Canuto [1] ; Sampaio, Aline da Graca [2] ; da Silva, Diego Morais [1] ; Montanheiro, Thais Larissa do Amaral [1] ; Koga-Ito, Cristiane Yumi [2] ; Thim, Gilmar Patrocinio [1]
Total Authors: 6
[1] Technol Inst Aeronaut ITA, Plasma & Proc Lab LPP, Praca Marechal Eduardo Gomes 50, BR-12228970 Sao Jose Dos Campos, SP - Brazil
[2] Sao Paulo State Univ UNESP, Sao Jose dos Campos Inst Sci & Technol, Genoma Lab, Estr Dr Altino Bondensan 500, BR-12247016 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Applied Surface Science; v. 543, MAR 30 2021.
Web of Science Citations: 0

The heterogeneity and weak chemical interactions between unmodified AgVO3 and acrylic resins can impair this biomaterial's mechanical properties, limiting its clinical application. The incorporation of AgVO3 nanorods silanized with the organosilane gamma-methacryloxypropyltrimethoxysilane (gamma-MPS) to acrylic resin was evaluated to avoid these undesirable effects. The silanized samples were analyzed by Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), scannin g electron microscopy with field emission gun (FE-SEM) and energy dispersive X-ray (EDX-SEM), transmission electron microscopy (TEM), and dispersibility test in MMA . The nanorods modified using MPS were inserted in the PMMA matrix and characterized concerning the Shore-D hardness and Izod impact tests. FE-SEM and X-ray microtomography were used to analyze the dispersion and interaction of the nanorods in the matrix. The experimental results showed that acrylic groups were inserted on AgVO3 surfaces after the silanization (AgVO3-M), resulting in a significative dispersion and interaction with MMA. Nanocomposites produced with AgVO3-M showed improved dispersion and interaction with PMMA, resulting in higher Shore-D hardness and impact strength values than the material incorporated with pristine AgVO3. In conclusion, the incorporation of AgVO3 nanorods silanized with gamma-MPS to PMMA produced acrylic-based nanocomposites with superior mechanical properties. (AU)

FAPESP's process: 17/24873-4 - PHBV and hydroxybutyrate functionalized CNT nanocomposite: kinetic study of crystallization and correlation with mechanical properties
Grantee:Thaís Larissa do Amaral Montanheiro
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 18/12035-7 - Mechanical and antimicrobial properties of Ag/PMMA nanocomposite
Grantee:Gilmar Patrocínio Thim
Support type: Regular Research Grants
FAPESP's process: 17/02846-5 - AgVO3/PMMA Nanocomposites: Effect of functionalization with acrilamide on mechanical and antimicrobial properties
Grantee:Beatriz Rossi Canuto de Menezes Rodrigues
Support type: Scholarships in Brazil - Doctorate