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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.)

Residual sisal fibers treated by methane cold plasma discharge for potential application in cement based material

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Author(s):
Barra, B. N. [1] ; Santos, S. F. [2] ; Bergo, P. V. A. [1] ; Alves, Jr., C. [3] ; Ghavami, K. [4] ; Savastano, Jr., H. [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Dept Engn Biossistemas, Pirassununga, SP - Brazil
[2] Univ Estadual Paulista UNESP, Dept Mat & Tecnol, Guaratingueta, SP - Brazil
[3] Univ Fed Rural Semiarido UFERSA, CiTED Ctr Integrado Inovacao Tecnol Semiarido, Mossoro, RN - Brazil
[4] Pontificia Univ Catolica Rio de Janeiro PUC RJ, Dept Engn Civil, Rio De Janeiro, RJ - Brazil
Total Affiliations: 4
Document type: Journal article
Source: INDUSTRIAL CROPS AND PRODUCTS; v. 77, p. 691-702, DEC 23 2015.
Web of Science Citations: 14
Abstract

The use of residual sisal fiber is becoming more frequent as reinforcement element in organic or inorganic matrix due to its low cost, high abundance in some countries and constitutes a renewable material. However, a significant loss in the mechanical performance in long term has been observed in fiber-cement composites after natural aging. These alternative fibers can be utilized in a hybrid fiber-cement in order to decrease the content of traditionally used synthetic fibers. The objective of this work was to evaluate the potential of the methane cold plasma treatment of 10 min duration on structural and physical properties of the residual sisal fibers to mitigate the degradation mechanisms when applied to cementitious matrices. Moisture sensitivity evaluation by capacitance method, dielectric measurements, X-ray diffraction, Fourier transform infrared (FTIR), spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), angle contact and pullout test were carried out in order to follow the effect of the proposed treatment. Besides, mechanical behavior of untreated and treated sisal fibers was evaluated before and after accelerated aging in cementitious solution at 60 degrees C by 72 h. The results obtained in all these tests confirmed the high potential of the methane cold plasma treatment to delay the degradation of the residual sisal fibers in the presence of a Portland cement environment and these fibers present the higher pullout load and shear stress than one untreated. (C) 2015 Published by Elsevier B.V. (AU)

FAPESP's process: 08/04769-9 - Degradation study of cellulosic fibers in cementitious composites: contribution to sustainable constructive materials
Grantee:Alessandra Etuko Feuzicana de Souza Almeida
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 09/10614-0 - Fundamental mechanical characteristics of non-conventional composites reinforced with cellulose and synthetic fibres: contribution to sustainable building materials
Grantee:Holmer Savastano Junior
Support Opportunities: Regular Research Grants
FAPESP's process: 09/17293-5 - Fracture mechanics applied to the development of non conventional extruded composites reinforced with cellulosic and synthetic fibers
Grantee:Sérgio Francisco dos Santos
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 10/16524-0 - Fracture mechanics applied to the development of non conventional extruded composites reinforced with cellulosic and syntetic fibers
Grantee:Sérgio Francisco dos Santos
Support Opportunities: Scholarships in Brazil - Young Researchers