Effect of chemical treatments of Alfa (Stipa tenacissima) fibres on water-sorption properties

Bessadok, Atef; Marais, Stéphane; Gouanvé, Fabrice; Colasse, Laurent; Zimmerlin, Irène; Roudesli, Sadok; Métayer, M. Le

doi:10.1016/j.compscitech.2006.04.013

Cited by 222 publications

(139 citation statements)

References 26 publications

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“…Ways of influencing the moisture content and moisture sorption kinetics are reviewed below. Different chemical treatments that influence the sorption isotherms of the fibers have been reported [69,112,118,119,120]. The treatment of flax fibers with acetic anhydride and styrene reduced the water uptake, whereas silane and maleic anhydride do not have such a positive effect [118].…”

Section: Water Sorption Of Single Fibersmentioning

confidence: 99%

Factors affecting the hygroexpansion of paper

Lindner

2017

J Mater Sci

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Paper is a widely used packaging material and is nowadays regaining importance, e.g., as bio-based and biodegradable material. Moreover, new technologies such as polymer-fiber composites, printed electronics and the deep drawing of paper are developing. The process stability and also the resulting quality of paper converting processes such as coating, metallization, printing, and the printing of electronics are highly affected by the hygroexpansion of paper. In order to reduce production instability and to choose and develop paper substrates with ideal characteristics, critical parameters need to be known. This paper offers an extensive overview of those parameters, starting at a molecular and microscopic level with the effect of the constituents and morphology of single fibers, before moving on to paper contents, chemical modifications and additives and finally concluding with paper production and fiber network modification. It was found that the major influences are single fiber sorption, inter-fiber contacts, microfibril angle, fiber morphology (length, width, curliness) and fiber orientation. This review gives new ideas and insights for technologists working in research, development and production optimization of paper-based products.

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Section: Water Sorption Of Single Fibersmentioning

confidence: 99%

Factors affecting the hygroexpansion of paper

Lindner

2017

J Mater Sci

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“…It occupies in North Africa about 7 million ha and it belongs to the graminacies family and grows to a height of about 1 m [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

FTIR spectroscopy and X-ray powder diffraction characterization of microcrystalline cellulose obtained from alfa fibers

Khimeche¹,

Debenath

Benelmir

2013

MATEC Web of Conferences

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Abstract. Many cereal straws have been used as raw materials for the preparation of microcrystalline cellulose (MCC). These raw materials were gradually replaced with wood products; nevertheless about 10% of the world overall pulp production is obtained from non-wood raw material. The main interest in pulp made from straw is that it provides excellent fibres for different industries with special properties, and that it is the major available source of fibrous raw material in some geographical areas. The aim of the present work was to characterize microcrystalline cellulose prepared from alfa fibers using the hydrolysis process. The products obtained are characterized with FTIR spectroscopy and X-ray powder diffraction. As a result, FTIR spectroscopy is an appropriate technique for studying changes occurred by any chemical treatment. The spectrum of alfa grass stems shows the presence of lignin and hemicelluloses. However, the cellulose spectrum indicates that the extraction of lignin and hemicellulose was effective. The X-ray analysis indicates that the microcrystalline cellulose is more crystalline than the source material.

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“…It can be observed that the silane treatment on alkalized CF, which is the most efficient in terms of moisture resistance, is characterized by the lowest polarity parameter. Therefore, silane treatment on alkalized fiber had enhanced the fibermatrix adhesion and led to a most hydrophobic surface [21]. From the Figure 6 for sample B, the water uptake of alkali treated CF composite (1.87%) showed close values to silane treated on alkalized CF composite (1.90%).…”

Section: Impact Testmentioning

confidence: 81%

Effect of Chemical Treatment on Mechanical and Water-Sorption Properties Coconut Fiber-Unsaturated Polyester from Recycled PET

Abdullah

Ahmad

2012

ISRN Materials Science

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Coconut fibers were used as reinforcement for unsaturated polyester resin from recycled PET that has been prepared using glycolysis and polyesterification reaction. Various concentrations of alkali, silane, and silane on alkalized fiber were applied and the optimum concentration of treatments was determined. Morphological and mechanical properties of the composite have also been investigated to study the effect of fiber surface treatment. The influence of water uptake on the sorption characteristics of composites was studied via immersion in distilled water at room temperature. Surface treatment of coconut fiber caused a significant increase in the tensile properties with the optimum treatment of 0.5% silane on the 5% alkalized coconut fiber/polyester composites. For water absorption study, it was observed that the treated fiber composites showed lower water absorption properties in comparison to those of untreated fiber composites. SEM investigation showed that the surface modification of fiber has better fiber-matrix interaction. Thus, chemical treatments on the fiber improve fiber/matrix adhesion especially for silane on alkalized fiber treatment.

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Effect of chemical treatments of Alfa (Stipa tenacissima) fibres on water-sorption properties

Cited by 222 publications

References 26 publications

Factors affecting the hygroexpansion of paper

Factors affecting the hygroexpansion of paper

FTIR spectroscopy and X-ray powder diffraction characterization of microcrystalline cellulose obtained from alfa fibers

Effect of Chemical Treatment on Mechanical and Water-Sorption Properties Coconut Fiber-Unsaturated Polyester from Recycled PET

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