Nanofibrillated cellulose and cellulosic pulp for reinforcement of the extruded cement based materials

Autor(es)

Correia, Viviane da Costa ^[1] ; Santos, Sergio Francisco ^[2] ; Teixeira, Ronaldo Soares ^[1] ; Savastano Junior, Holmer ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Anim Sci & Food Engn, Dept Biosyst Engn, Duque de Caxias Norte St 225, BR-13630000 Pirassununga, SP - Brazil

^[2] Sao Paulo State Univ, Fac Engn, Dept Mat & Technol, Ariberto Pereira da Cunha 333, BR-12516410 Guararingueta, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CONSTRUCTION AND BUILDING MATERIALS; v. 160, p. 376-384, JAN 30 2018.
• Citações Web of Science: 9

Resumo

The use of cellulose nanofibers as reinforcement may contribute for improving particle packing and decrease the crack growth rate of composites at nanoscale. Additionally, the high specific surface area of cellulose nanofibers contributes to improve the adhesion between the cement particles. Thus, the aim of this work was the study the performance of hybrid composites reinforced with 8% pulp and 1% nanofibrillated cellulose compared to composites reinforced with only 9% of pulp produced by the extrusion process. The accelerated aging process by means of 200 wet and dry cycles was carried out to assess composite degradation. In the hybrid composites the nanofibrillated cellulose improved the mechanical behavior compared to the composite without nanofiber. This improvement may be associated with greater adherence between the nanofibrils and the cement matrix. After accelerated ageing, the composites with and without nanofibers showed no reduction in mechanical performance, which is attributed to the lower alkalinity provided by the accelerated carbonation. Therefore, the nanofibrillated cellulose showed to be a promising material for use as nanoreinforcement of the extruded hybrid cement-based composites. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/01128-5 - Produção de whiskers a partir de polpa organossolve de bambu e utilização como nanoreforço de compósitos cimentícios.
• Beneficiário: Viviane da Costa Correia
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/51467-3 - Agroindustrial wastes and their potential use as appropriate materials for housing and infraestructure (Agrowaste)
• Beneficiário: Holmer Savastano Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 15/21079-0 - Obtenção de celulose nanofibrilada de bambu e seu potencial como reforço para matrizes frágeis
• Beneficiário: Viviane da Costa Correia
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado