Influence of chemical modifications on water-sorption and mechanical properties of Agave fibres

Bessadok, Atef; Marais, Stéphane; Roudesli, Sadok; Lixon, C.; Métayer, M. Le

doi:10.1016/j.compositesa.2007.09.007

Cited by 116 publications

(81 citation statements)

References 29 publications

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“…It is important to know the different properties of each natural fi ber, such as density, to be able to better exploit its potential. In this case, the obtained density value (414.7 kg/m 3 ) is lower than that reported for other species of Agave (Li et al, 2000;Bessadok et al, 2008;Kestur et al, 2013). This may be due to differences between the species but also to the treatment of the fi ber during the mezcal production process.…”

Section: Discussioncontrasting

confidence: 45%

“…The density determined for this fi ber was 414.7 kg/ m 3 . Values have not been previously reported for this species, but the density values reported for the fi bers of other species are as follows: 880 kg/m 3 for Agave tequilana fibers (Kestur et al, 2013), 740 kg/m 3 for A. americana fi bers (Bessadok et al, 2008) and 1450 kg/m 3 for A. sisalana fibers (Li et al, 2000).…”

Section: Resultsmentioning

confidence: 75%

“…Although studies on Agave an- gustifolia are scarce (Vera Guzmán et al, 2009;Esqueda et al, 2011;Mejía-Franco and Arzate-Fernández, 2011;Bautista and Smit, 2012; Martinez Gutierrez et al, 2012;Cruz-García et al, 2013;Allsopp et al, 2013), the potential benefi ts of this lignocellulosic material cannot be ignored. Additional research on its properties is needed so that future alternative uses may be identifi ed and contribute to economic activity by increasing development opportunities, as has occurred with other species (Iñiguez-Covarrubias et al, 2001a;Iñiguez-Covarrubias et al, 2001b;Piven et al, 2001;Gil-Vega et al, 2006;Bessadok et al, 2008; Velazquez-Jimenez et al, 2013). Cooked Agave angustifolia bagasse is a material with numerous fi bers and is a largely underutilized waste material from the mezcal (alcoholic beverage) industry; however, these fi bers, similar to other plant fi bers, are lignocellulosic materials with technical, economic and ecological potential and therefore could be used in different industries.…”

Section: Introductionmentioning

confidence: 99%

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Chemical and morphological characterization of <em>Agave angustifolia</em> bagasse fibers

et al. 2015

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Abstract:The main aim of this study was to characterize cooked bagasse fi bers from Agave angustifolia Haw. The fi bers were characterized using scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, X-ray Diffraction and chemical analysis. The tensile strength was also tested using fi bers with a uniform length (30 mm). The fi bers were light brown in color, with a mean diameter and length of 501 μm and 144 mm, respectively. Scanning electron microscopy images revealed elliptically shaped cells with varying lumen size. Holocellulose content was approximately 82.12 %, and total lignin content was approximately 20.69 %. Due to the crystallinity and lignin content, the fi bers proved to be thermo-stable until 220 °C.The mean values of tensile strength, Young's modulus, % strain (ε), and ultimate tensile strength were determined via mechanical tests. The results are comparable to those of other common lignocellulosic fi bers, confi rming their potential use as a reinforcing element in a polymer matrix to form a new biodegradable composite. Keywords: chemical composition, crystallinity, mechanical tests, morphology, thermal analysis Resumen: El objetivo principal de este estudio fue caracterizar las fi bras de bagazo cocido de Agave angustifolia Haw. Las fi bras fueron caracterizadas a través de microscopia electrónica de barrido, calorimetría diferencial de barrido, análisis termogravimétri-cos, difracción de rayos X y análisis químico. También se realizaron pruebas de resistencia a la tracción usando fi bras de longitud constante (30 mm). Las fi bras presentaron un color marrón claro, con diámetro medio de 501 μm y longitud media de 144 mm. Las imágenes del microscopio electrónico de barrido mostraron células de forma elíptica con diferente tamaño de lumen. El contenido de holocelulosa fue alrededor de 82.12 % y el contenido total de lignina de aproximadamente 20.69 %. La fi bra resultó ser térmicamente estable hasta 220 °C debido a la cristalinidad y el contenido de lignina. El esfuerzo de tensión, el módulo de Young, el porcentaje de deformación (ε) y el esfuerzo último de tensión fueron obtenidos de las pruebas mecánicas. Los resultados son comparables a los de otras fi bras lignocelulósicas comunes, lo cual confi rma que estas fi bras tienen potencial como refuerzo en una matriz polimérica para formar un nuevo compuesto biodegradable. Palabras clave: análisis térmico, composición química, cristalinidad, morfología, pruebas mecánicas. ETHNOBOTANY R ecently, research on plant fi bers has been increasing due to the abundance of these materials and their status as renewable resources (Joseph et al., 1999;Ghali et al., 2006;Lucena et al., 2009;Ku et al., 2011;Kestur et al., 2013). Consequently, this focus has led to further research on the specifi c characterization of individual plant fi bers such as bamboo, okra, sisal, and henequen (Mishra et al., 2004; Bé-akou et al., 2008;De Rosa et al., 2010;Liu et al., 2012;Arrakhiz et al., 2013) and studies on composite materials (Mohan...

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Section: Discussioncontrasting

confidence: 45%

Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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Chemical and morphological characterization of <em>Agave angustifolia</em> bagasse fibers

et al. 2015

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“…He found greater weight loss in reinforced materials with higher stay fiber content during follow-up for six weeks. These fibers are characterized by mainly cellulose, hemicellulose and lignin, respectively (Bessadok et al, 2008)natural fibres are more and more considered as reinforcement in composite materials. In this work, to improve the adhesion between a polyester matrix (unsaturated polyester resin.…”

Section: Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

“…To maintain a polymer elasticity, long chain molecules and a suitable crosslinking are required to dissipate the mechanical energy, which is caused by the pressure exerted on the hydrogel (Sannino et al, 2009). One of the alternatives to improve the mechanical properties is the use of natural fibers (Rodrigues et al, 2013), these fibers are characterized by containing cellulose, hemicellulose and lignin, respectively (Bessadok, Marais, Roudesli, Lixon & Métayer, 2008)natural fibres are more and more considered as reinforcement in composite materials. In this work, to improve the adhesion between a polyester matrix (unsaturated polyester resin.…”

Section: Introductionmentioning

confidence: 99%

Natural fibers for hydrogels production and their applications in agriculture

Serna-Cock¹,

Guancha-Chalapud²

2017

Acta Agron.

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This paper presents a review on hydrogels applied to agriculture emphasizing on the use of natural fibers. The objectives were to examine, trends in research addressed to identify natural fibers used in hydrogels development and methods for modifying natural fibers, understand factors which determine the water retention capacity of a hydrogel. Consequently, this paper shows some methodologies used to evaluate the hydrogels efficiency and to collect in tables, relevant information in relation to methods of natural fibers modification and hydrogel synthesis. It was found that previous research focused on hydrogels development processed with biodegradable polymers such as starch, chitosan and modified natural fibers, cross-linked with potassium acrylate and acrylamide, respectively. In addition, current researches aimed to obtaining hydrogels with improved properties, which have allowed a resistance to climatic variations and soil physicochemical changes, such as pH, presence of salts, temperature and composition. In fact, natural fibers such as sugarcane, agave fiber and kapok fiber, modified with maleic anhydride, are an alternative to obtain hydrogels due to an increasing of mechanical properties and chemically active sites. However, the use of natural nanofibers in hydrogels, has been a successful proposal to improve hydrogels mechanical and swelling properties, since they give to material an elasticity and rigidity properties. A hydrogel efficiency applied to soil, is measured throughout properties as swellability, mechanical strength, and soil water retention. It was concluded that hydrogels, are an alternative to the current needs for the agricultural sector.Key words: Hydrogels, methods of modifying fiber, nanofibers, superabsorbent, water retention capacity. ResumenEn el presente artículo se presenta una revisión de literatura sobre hidrogeles aplicados a la agricultura, haciéndose mayor énfasis en el uso de fibras vegetales. Los objetivos fueron examinar las tendencias en la investigación, identificar las fibras naturales utilizadas en el desarrollo de hidrogeles, mostrar los métodos de modificación de fibras naturales para la elaboración de hidrogeles, entender los factores que determinan la capacidad de retención de agua de un hidrogel, mostrar algunas metodologías empleadas para evaluar la eficiencia de un hidrogel y recopilar en tablas, información relevante en relación a métodos de modificación de fibras naturales y de síntesis de hidrogeles. Se encontró que las investigaciones se orientan al desarrollo de hidrogeles elaborados a bases de polímeros biodegradables como almidón, quitosano y fibras vegetales modificadas, entrecruzadas con acrilato de potasio y acrilamida. Además, las investigaciones apuntan a la obtención de hidrogeles con propiedades mejoradas, que permitan resistir las variaciones climáticas y los cambios fisicoquímicos del suelo como el pH, la presencia de sales, temperatura y composición. Fibras naturales como caña de azúcar, fibra de agave y fibra de kapoc, modificadas con ...

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Natural Composites: Fiber Modification

Baltazar‐y‐Jimenez

Awal

Sain

2012

Wiley Encyclopedia of Composites

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In this article, natural composites are defined as vegetal or lignocellulosic fiber‐reinforced polymer composites. Several surface modification methods appropriate for vegetal fibers are discussed in three broad categories: physical or chemical methods designed to improve water repellence, improve adhesion to a polymer matrix, and methods for increasing thermal and fire resistance. A brief outlook of alternative surface modification methods for vegetal fibers is also presented. A number of surface modification methods may be used with synergistic effect. However, a delicate balance exists between technological feasibility and cost, whatever this may be. Ideally, selecting a useful method to modify the performance of vegetal fibers is a holistic process that requires of balancing materials' properties, with economic and environmental considerations.

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Influence of chemical modifications on water-sorption and mechanical properties of Agave fibres

Cited by 116 publications

References 29 publications

Chemical and morphological characterization of <em>Agave angustifolia</em> bagasse fibers

Chemical and morphological characterization of <em>Agave angustifolia</em> bagasse fibers

Natural fibers for hydrogels production and their applications in agriculture

Natural Composites: Fiber Modification

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