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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.)

Poly (ethyl methacrylate) composites reinforced with modified and unmodified cellulose nanocrystals and its application as a denture resin

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Author(s):
Silverio, Hudson Alves [1] ; Leite, Andressa Rosa Perin [2] ; da Silva, Marcela Dantas Dias [2] ; de Assuncao, Rosana Maria Nascimento [3] ; Pero, Ana Carolina [2] ; Pasquini, Daniel [1]
Total Authors: 6
Affiliation:
[1] Uberlandia Fed Univ UFU, Inst Chem, Santa Monica Campus, BR-38400902 Uberlandia, MG - Brazil
[2] Sao Paulo State Univ Unesp, Dept Dent Mat & Prosthodont, Sch Dent, Rua Humaita 1680, BR-14801903 Araraquara, SP - Brazil
[3] Uberlandia Fed Univ UFU, Fac Ciencias Integradas Pontal, Pontal Campus, BR-38304402 Ituiutaba, MG - Brazil
Total Affiliations: 3
Document type: Journal article
Source: POLYMER BULLETIN; MAR 2021.
Web of Science Citations: 0
Abstract

The aim of this study was to characterize cellulose nanocrystals (CNC) used to the preparation of nanocomposites and evaluate the influence of incorporating the CNC on flexural strength of a denture rebase resin. CNC were isolated from wood pulp by acid hydrolysis. In addition, maleic anhydride was used to superficially modify the CNCs. The modified (CNCmod) and unmodified nanocrystals (CNC) were suitably characterized and used separately as a reinforcement element in situ in a denture rebase resin consisting of poly ethyl methacrylate, at 0% (control group), 0.25%, 0.5%, 0.75% and 1%. The flexural strength of the groups was measured using a 3-point bending test with EMIC DL 2000 machine. AFM images showed that CNC and CNCmod samples presented nanoparticles with typical acicular shape and similar dimensions. A significant improvement of the flexural strength was obtained, even at low load levels, especially considering the nanoparticles with chemically modified surface. The incorporation of both modified and unmodified CNCs represents an alternative that can maximize the mechanical properties of acrylic resins and their respective dental applications. (AU)

FAPESP's process: 17/26512-9 - Incorporation of cellulose nanocrystals into dental resins for denture base and relining. Chemical characterization and effect on physical, mechanical and biological properties.
Grantee:Ana Carolina Pero
Support type: Regular Research Grants