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Production of whiskers from the bamboo organosolv pulp and its use as nanoreinforcement of cement based composites

Grant number: 11/01128-5
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2012
Effective date (End): March 31, 2015
Field of knowledge:Engineering - Civil Engineering - Construction Industry
Principal Investigator:Holmer Savastano Junior
Grantee:Viviane da Costa Correia
Home Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil

Abstract

The use of natural fibers as reinforcement for cement-based composites is justified by the low cost, high availability, especially in countries like Brazil, which has developed agriculture, good soil and climatic conditions and large areas for cultivation of different crops. However, due to the high alkalinity of cement matrix has it enhanced durability compromised by the degradation of the fibers. One measure to decrease this alkaline attack is the lignin and hemicelluloses dissolution of fibers, which are less resistance under conditions of high pH, by chemical pulping, a process that individualizes the cellulosic fibers that are used as reinforcement of cementitious composites in replacement of synthetic fibers used in mill. Pulps applied for this purpose are produced by the kraft pulping process. A cleaner alternative to this process is organosolv pulping using organic reagents during cooking and provides facility for solvent recovery at the end of the process. The nanowhiskers obtained from bamboo organosolv pulp may provide improvements in mechanical and physical properties in cementitious composites, since the incorporation is possible to form bridges for the transfer of tensions between the nanowhiskers reducing the occurrence of cracking in the nano scale and improvement of the composite performance over the useful life.

Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CORREIA, VIVIANE DA COSTA; SANTOS, SERGIO FRANCISCO; TEIXEIRA, RONALDO SOARES; SAVASTANO JUNIOR, HOLMER. Nanofibrillated cellulose and cellulosic pulp for reinforcement of the extruded cement based materials. CONSTRUCTION AND BUILDING MATERIALS, v. 160, p. 376-384, JAN 30 2018. Web of Science Citations: 9.
CORREIA, VIVIANE DA COSTA; DOS SANTOS, VALDEMIR; SAIN, MOHINI; SANTOS, SERGIO FRANCISCO; LEAO, ALCIDES LOPES; SAVASTANO JUNIOR, HOLMER. Grinding process for the production of nanofibrillated cellulose based on unbleached and bleached bamboo organosolv pulp. Cellulose, v. 23, n. 5, p. 2971-2987, OCT 2016. Web of Science Citations: 18.
VIVIANE DA COSTA CORREIA; ANTONIO APRIGIO DA SILVA CURVELO; KAREN MARABEZI; ALESSANDRA ETUKO FEUZICANA DE SOUZA ALMEIDA; HOLMER SAVASTANO JUNIOR. Bamboo cellulosic pulp produced by the ethanol/water process for reinforcement applications. Ciênc. Florest., v. 25, n. 1, p. 127-135, Mar. 2015.
CORREIA, VIVIANE DA COSTA; DA SILVA CURVELO, ANTONIO APRIGIO; MARABEZI, KAREN; FEUZICANA DE SOUZA ALMEIDA, ALESSANDRA ETUKO; SAVASTANO JUNIOR, HOLMER. BAMBOO CELLULOSIC PULP PRODUCED BY THE ETHANOL/WATER PROCESS FOR REINFORCEMENT APPLICATIONS. CIENCIA FLORESTAL, v. 25, n. 1, p. 127-135, JAN-MAR 2015. Web of Science Citations: 3.
CORREIA, VIVIANE DA COSTA; SANTOS, SERGIO FRANCISCO; MARMOL, GONZALO; DA SILVA CURVELO, ANTONIO APRIGIO; SAVASTANO, JR., HOLMER. Potential of bamboo organosolv pulp as a reinforcing element in fiber-cement materials. CONSTRUCTION AND BUILDING MATERIALS, v. 72, p. 65-71, DEC 15 2014. Web of Science Citations: 18.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.