Poly (ethyl methacrylate) composites reinforced with modified and unmodified cellulose nanocrystals and its application as a denture resin
| Autor: | Daniel Pasquini, Hudson Alves Silvério, Andressa Rosa Perin Leite, Rosana Maria Nascimento de Assunção, Marcela Dantas Dias da Silva, Ana Carolina Pero |
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| Přispěvatelé: | Uberlândia Federal University (UFU), Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Nanofibers Nanoparticle 02 engineering and technology engineering.material 010402 general chemistry Methacrylate 01 natural sciences chemistry.chemical_compound Biopolymers Flexural strength Materials Chemistry Composite material Acrylic resin Acicular Nanocomposite Pulp (paper) Maleic anhydride General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium engineering Strength 0210 nano-technology Dental polymers Resins |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2021-06-25T10:30:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 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. Institute of Chemistry Uberlândia Federal University (UFU), Santa Mônica Campus Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University (Unesp), Rua Humaitá 1680 Faculdade de Ciências Integradas Do Pontal Uberlândia Federal University (UFU) Department of Dental Materials and Prosthodontics School of Dentistry São Paulo State University (Unesp), Rua Humaitá 1680 |
| Databáze: | OpenAIRE |
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