Effect of fiber treatments on the sisal fiber properties and fiber–matrix bond in cement based systems

Ferreira, Saulo Rocha; Silva, Flávio de Andrade; Lima, Paulo Roberto Lopes; Filho, Romildo Dias Toledo

doi:10.1016/j.conbuildmat.2015.10.120

Cited by 167 publications

(117 citation statements)

References 28 publications

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“…The main Agave species used for fiber extraction based on quality, yield, and ease of extraction are A. sisalana , A. americana , and A. fourcroydes . The remarkable mechanical properties and accessibility of Agave fibers has motivated currently ongoing studies aimed at their use in cement composites and hydrogel‐films, and for other applications.…”

Section: Biotechnological Advances In Agavementioning

confidence: 99%

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Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest inAgaveL. for genetic improvement and biocatalysis

Tamayo‐Ordóñez

Ayil‐Gutiérrez

Tamayo-Ordóñez

et al. 2018

Biotechnology Progress

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Several of the over 200 known species of Agave L. are currently used for production of distilled beverages and biopolymers. The plants live in a wide range of stressful environments as a result of their resistance to abiotic stress (drought, salinity, and extreme temperature) and pathogens, which gives the genus potential for germplasm conservation and biotechnological applications that may minimize economic losses as a result of the global climate change. However, the limited knowledge in the genus of genome structure and organization hampers development of potential improved biotechnological applications by means of genetic manipulation and biocatalysis. We reviewed Agave and plant sequences in the GenBank NCBI database for identifying genes with biotechnological potential for fermentation, bioenergy, fiber improvement, and in vivo plant biopolymer production. Three-dimensional modeling of enzyme structures in plant accessions revealed structural differences in sucrose 1-fructosyltransferase, fructan 1-fructosyltransferase, fructan exohydrolase (1-FEH), cellulose synthase (CES), and glucanases (EGases) with possible effects in fructan, sugar, and biopolymer production. Although the coding genes of FEH and enzymes involved in biopolymer production (CES, sucrose synthase, and EGases) remain unidentified in Agave L., our results could aid isolation of such genes in Agave. By comparing nucleotide and amino acid sequences in accessions of Agave and other plants, knowledge may be gained about transcriptional regulation and enzymatic activity factors. Future study is needed of biotechnological application of Agave genes for crop breeding aided by genetic engineering and biocatalysis.

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Section: Biotechnological Advances In Agavementioning

confidence: 99%

“…Agave fibers has motivated currently ongoing studies aimed at their use in cement composites 135,136 and hydrogel-films, 137 and for other applications. Because of their CAM photosynthesis pathway, Agave crops survive prolonged periods of drought leading to high biomass productivity.…”

Section: The Remarkable Mechanical Properties and Accessibility Ofmentioning

confidence: 99%

Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest inAgaveL. for genetic improvement and biocatalysis

Tamayo‐Ordóñez

Ayil‐Gutiérrez

Tamayo-Ordóñez

et al. 2018

Biotechnology Progress

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“…The hornification reduces the water absorption capacity of the fibers and improves fibermatrix bonding, that is because it causes structural changes in the cellulosic fibers from the wetting and drying cycles in the fibers [4,5,6]. In addition to simple and low energy consumption, this procedure increases the degree of crosslinking in the fiber microstructure, reduces the volumetric changes of natural fibers as well as promotes changes in their mechanical properties [1].…”

Section: Introductionmentioning

confidence: 99%

Futher Analyses on Hornification Promotion by Washing Cycles on Natural Vegetable Fibers

Mendes¹,

Hugen²,

Santos³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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Several treatments on natural fibers are presented by literature as effective process to mitigate the high water absorption and reduce dimensional variation. The wetting and drying cycles treatment is pointed as an efficient treatment since they promote the stiffening of the polymer structure of the fiber cells, known as hornification. One of the main characteristics of this process is the greater dimensional stability of the fibers. In this context, the objective of the present research is to investigate the influence of wetting time, fiber/water ratio and number of wetting and drying cycles on the treatment and its effect on sisal fibers chemical and mechanical properties. The treatment of the fibers was performed in water at room temperature (T = 22 °C), varying wetting time (1h and 3h) and fiber/water ratio (1:10 and 1:40), drying process 80°C during 15 hours. Direct tensile tests, thermogravimetry analysis (TG) and infrared spectroscopy (FTIR) were performed on raw, pre-washed and treated fibers. The results revealed that lower fiber/water ratios are better to hornification promotion. Immersion times of 3 hours were efficient to increase stiffness in all studied cases.

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“…Mylsamy and Rajendran reported that 5% alkali treatment removes completely the hemicellulose from the sisal fiber leaving behind 86.27% cellulose, 4.05% lignin, 0.14% wax. The surface of natural fibers was modified by many researchers using the chemical treatment and process conditions . Polymers are utilized in electrical and electronic industries as housing components and their accessories.…”

Section: Introductionmentioning

confidence: 99%

Sisal fibril epoxy composite—a high strength electrical insulating material

et al. 2017

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Environment friendly high strength electrical insulating material was developed using fibrillated sisal and epoxy resin. Coarse sisal fibers were fibrillated into fibrils using mechanical disintegration. Fibrillated fibers provided a high strength, renewable, light weight dielectric variant reinforcement to epoxy resin. Different weight fractions (10–35%) of Agave sisalana fibrils were thoroughly mixed with epoxy resin system to develop composites. Chemical treatment was employed to improve the surface as well as chemical composition of sisal fibril to enhance mechanical strength and electrical insulating properties of composite. Chemical treatment of fibrils improved the tensile strength from 47.4 to 51.99 MPa at 35 wt% loading of sisal fibril in epoxy composite. A few important predictive models namely rule of mixture, Halpin–Tsai, Nielson Chen and Manera model were compared with the experimental values obtained in this present study. Nielson Chan model predicted the experimental data most accurately with an average relative error of 15.82%. Similarly the dissipation factor touched a level of 0.097, thereby indicating good insulation properties of composite. The tests were conducted at lower frequency range to higher frequency range 1–10 kHz and the composite material exhibited stability at high frequency range as compared to low frequency range. POLYM. COMPOS., 39:E2175–E2184, 2018. © 2017 Society of Plastics Engineers

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Effect of fiber treatments on the sisal fiber properties and fiber–matrix bond in cement based systems

Cited by 167 publications

References 28 publications

Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest inAgaveL. for genetic improvement and biocatalysis

Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest inAgaveL. for genetic improvement and biocatalysis

Futher Analyses on Hornification Promotion by Washing Cycles on Natural Vegetable Fibers

Sisal fibril epoxy composite—a high strength electrical insulating material

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