Physico-chemical and mechanical characterization of alkali-treated<i>Agave americana</i>L. fiber

Oudiani, Asma El; Sghaier, R. Ben; Chaabouni, Yassine; Msahli, Slah; Sakli, Faouzi

doi:10.1080/00405000.2011.578358

Cited by 23 publications

(21 citation statements)

References 26 publications

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“…The calculated CI for untreated and 6% alkali-treated cane fibres (for 24 h) were found to be 66.30% and 75.43%, respectively. The increase in CI by about 10%, obtained after alkali treatment, is thought to be the main contributing factor to the increase in fibre strength, as indicated by Ouajai et al 24 and El Oudiani et al 16 Hence, such a behaviour could be attributed to the increase of the crystalline region at the expense of the amorphous region during the alkalisation caused by loss of amorphous hemicelluloses as indicated in FTIR analysis. 23 The increase in CI is also related to the better packing and stress relaxation of cellulose chains as a result of the removal of amorphous constituents.…”

Section: X-ray Diffractionmentioning

confidence: 91%

“…This was expected, because alkalisation at higher concentrations caused the hydrogen bonds within the fibrils to be broken, reducing their tensile properties. 16,25 in addition to degradation of crystal structure with a partial crystallographic change from cellulose (I) to cellulose (II). 12,16 Conclusions Combined experiments were conducted to characterise changes in cane fibres upon alkalisation: SEM, FTIR, XRD and moisture absorption techniques; and to investigate enhancement in mechanical properties of cane/UP composites by using tensile and flexural tests with morphology studies of fractured composites.…”

Section: Effect Of Alkali Treatment On Mechanical Propertiesmentioning

confidence: 98%

“…16 The so-called Segal method -simple and still effective -based on the intensity measured at two points in XRD diffractogram allows to assess the crystallinity index. Crystallinity is an important factor which directly affects the strength of the fibres.…”

Section: X-ray Diffractionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of alkali treatment on the mechanical properties of new cane fibre/polyester composites

Chikouche

Merrouche

Azizi

et al. 2015

Journal of Reinforced Plastics and Composites

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In recent years, natural fibres have been experimented to replace glass fibres in reinforcing thermosetting polymer. Since the interfacial adhesion between the raw natural fibres and the polymer matrix are often not adapted to the intended applications, the fibre surface most often requires a preliminary chemical modification. The fibres which were extracted from the Arundo donax L. Plant (called cane fibres), are little studied in the literature of fibre/polymer composites. In the present work, the cane fibres have been treated at constant soaking time with 2-8% NaOH aqueous solutions for 24 h. The composite reinforced by 6% NaOH-treated cane fibres, exhibited maximum improvements in tensile and flexural strength by 57% and 45% respectively. A combination of Fourier transform infrared, scanning electron microscopy, X-ray diffraction and moisture absorption techniques has been used for material characterisation. The crystallinity index yields information about fibre modification by NaOH. Such cane fibre composites could become an alternative to existing materials, with interesting tensile and flexural strengths, low cost and less ecological impact.

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Section: X-ray Diffractionmentioning

confidence: 91%

Section: Effect Of Alkali Treatment On Mechanical Propertiesmentioning

confidence: 98%

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Influence of alkali treatment on the mechanical properties of new cane fibre/polyester composites

Chikouche

Merrouche

Azizi

et al. 2015

Journal of Reinforced Plastics and Composites

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“…The chopped fibres were treated with NaOH 1 N at room temperature for 1 h, followed by washing with distillate water until neutral pH was achieved; the treated fibre was characterized by the procedures already mentioned. NaOH treatment is a very common method in literature to reduce hemicellulose [25,26], lignin and other compounds [19,27] in natural fibres, as well as to reduce their hydrophilic character and water absorption [16,17,27].…”

Section: Fibre Obtaining and Characterizationmentioning

confidence: 99%

Characterization of Agave americana L. plant as potential source of fibres for composites obtaining

et al. 2019

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This paper summarises the results obtained from the characterization assays from century plant (Agave americana L.), determining the chemical composition of different parts of the plant. Fibres were obtained by means of a mechanical device, specifically designed and built for Agave americana leaves processing. Obtained fibres were subjected to thermogravimetric analysis and infrared spectra, and their chemical composition was also determined by quantitative acid hydrolysis. Once obtained, fibres were blended up to 40% (in weight) to obtain composites by compression moulding, using polyethylene as matrix; mechanical testing show improvements in elastic modulus for both tensile and flexural tests; increase in flexural maximum strength were also found for the composites, while tensile strength is slightly reduced with the introduction of agave fibres. The research is part of a project developed in the Macaronesian region, which aim is to demonstrate the feasibility of using biomass from invasive plant species in the composites sector as a way of financing control campaigns and habitats conservation labours, which is the main novelty of this research.

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“…Raw ramie fibers are in the form of bundles of many individual ramie fibers adhesive together. These bundles can be processed to separate to a required diameter with chemical, biological, or mechanical methods (El Oudiani, Ben Sghaier, Chaabouni, Msahli, & Sakli, 2012;Hongqin & Chongwen, 2010;Qiang & Shuqin, 2013). Degumming refers to the removal of heavily coated and gummy material from the cellulosic part of plant fibers.…”

Section: Introductionmentioning

confidence: 99%

The effect of oxidation–reduction potential on the degumming of ramie fibers with hydrogen peroxide

2014

The Journal of The Textile Institute

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Oxidation-reduction potential (ORP) was applied to monitor and control the oxidation reaction of peroxide hydrogen in the degumming process of ramie fibers. The effects of original pH, hydrogen peroxide dosage, oxidation temperature, and reaction time on ORP variations and fiber degumming efficiency were fully investigated. Central composite design method was used to optimize the degumming process. The optimum operating parameters were original pH 11.0, hydrogen peroxide dosage of 5.0 g/L, oxidation temperature of 85°C, and reaction time of 60 min, respectively. When the ORP value in the solution varied from +320 to +350 mV, it could achieve desired and reasonable degumming result. Under this range, the residual gum percentage of treated fibers was relatively lower and the mechanical property was better compared with other ORP values. This study could be instructive in online monitoring and control of ramie fiber preparation process using ORP as an indicating factor.

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Physico-chemical and mechanical characterization of alkali-treatedAgave americanaL. fiber

Cited by 23 publications

References 26 publications

Influence of alkali treatment on the mechanical properties of new cane fibre/polyester composites

Influence of alkali treatment on the mechanical properties of new cane fibre/polyester composites

Characterization of Agave americana L. plant as potential source of fibres for composites obtaining

The effect of oxidation–reduction potential on the degumming of ramie fibers with hydrogen peroxide

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