The Influence of Chemical and Thermal Treatments on the Diss Fiber Hygroscopic Behaviors

Nouri, Mustapha; Tahlaiti, Mahfoud; Grondin, Frédéric; Belarbi, Rafik

doi:10.1080/15440478.2020.1848733

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…It is known to offer improved load transfer, adhesion, thermal stability, and chemical resistance, making it suitable for long-term, wear-resistant applications. [14][15][16]52 To quantitatively assess this, the Crystallinity Index (CI) was calculated using the following formula:…”

Section: X-ray Diffraction (Xrd) Properties Of Fibersmentioning

confidence: 99%

“…Raw natural fibers are hydrophilic and porous, leading to undesired moisture absorption and the deterioration of typical cementing microstructures. [11][12][13] Thermal, biological, and chemical treatments [14][15][16] have been proposed to enhance fiber durability and efficiency to some extent by removing non-cellulosic components, 14,17 such as the amorphous contents and reducing their porous nature. However, these processes are still not feasible for large-scale applications due to time, cost, and uniformity constraints, thereby limiting their practical use in the construction market.…”

Section: Introductionmentioning

confidence: 99%

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Abaca fiber as an efficient reinforcement for high mechanical performance in metakaolin‐based geopolymers

Constâncio Trindade,

Sood,

Silva

et al. 2023

Int J Applied Ceramic Tech

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This study introduces an innovative method for efficiently integrating abaca fibers into a potassium‐based geopolymer (KGP) material. Geopolymers often suffer from brittleness, and composite designs have been explored as a solution to enhance their strength and ductility. While synthetic reinforcements are commonly employed due to their consistent properties, natural fibers offer a renewable and eco‐friendly alternative. However, their widespread use has been hindered by complex and time‐consuming treatments, resulting in variable morphologies that affect fiber‐matrix adhesion. It is worth noting that previous research has primarily focused on alkali‐activated and cementitious applications, leaving a knowledge gap in understanding its interactions with calcium‐free, metakaolin‐based geopolymers. Consequently, this study aimed to simplify the conversion of raw abaca into uniformly chopped filaments, facilitating their integration into KGPs at levels of up to 7 wt%. The mechanical evaluation revealed exceptional performance, with compressive strengths reaching up to 45 MPa. A thorough analysis confirmed robust, fiber‐matrix adhesion and identified the presence of lignin and cellulose, significantly contributing to the fiber's strength. Flow table tests showcased their versatility, transitioning from high flowability (1 wt%) to complete shape retention (7 wt%). Furthermore, all variations exhibited great ductility, multiple cracking formation, and minimal variability in mechanical properties.

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Section: X-ray Diffraction (Xrd) Properties Of Fibersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Abaca fiber as an efficient reinforcement for high mechanical performance in metakaolin‐based geopolymers

Constâncio Trindade,

Sood,

Silva

et al. 2023

Int J Applied Ceramic Tech

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“…Salem et al 19 enhanced the surface texture of the jute fibres by subjecting it to NaOH treatment, silane and epoxy treatment, respectively. The hygrothermal property of a new organic diss fibre was experimented by Nouri et al 20 after putting the fibres through heat and few chemical treatments like alkaline, acetic acid and silane respectively. It was found that the hydrophilic characteristics got highly reduced due to the treatments and simultaneously, chemical treatment put a good impact on adsorption fluctuation.…”

Section: Introductionmentioning

confidence: 99%

Impact of distinct alkaline treatment on natural plant fibre reinforced polymer composites

Kar

Jena

Bhoi

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The primary goal of this research work is to enhance the mechanical behaviour of luffa, coir and sisal fibre reinforced polymer composites, which had undergone diverse chemical processing. The selected green fibres were subjected to a variety of alkaline treatments at varied concentration of 5% NaOH, 3% KOH and 7% Ca(OH)2 for 4, 2 and 6 h, respectively. The hand lay-up method was used to prepare the nine distinct samples. It was found that the composites with highest wt.% of coir and luffa fibres which underwent NaOH treatment resulted in highest tensile strengths of 10.946 and 14.425 MPa. However, Ca(OH)2 treatment proved to be better for composites containing 20% sisal fibres. Similarly, 20% NaOH treated coir fibre reinforced composite exhibited better flexural stress and modulus, whereas Ca(OH)2 treatment led to increase in flexural stress and modulus for composites containing 20% sisal fibres. The impact strength of the composites containing highest percentage of coir fibres that is, 20% was higher for all alkali treatments. Composite containing 20% NaOH treated coir fibres exhibited maximum interlaminar shear strength. Overall, NaOH treatment of coir, Ca(OH)2 treatment of sisal and KOH treatment of luffa fibre significantly improved the mechanical behaviour of the composites.

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“…The results of the water sorption kinetic curves proved to be slow as well as fast on the fiber cell wall, exhibiting hysteresis between adsorption and desorption. Here, the different natural fibers exhibited a variable dynamics of water vapor sorption behavior, mainly in more porous matrices, such as cementitious and geopolymeric [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review

Azevedo¹,

Cruz²,

Marvila³

et al. 2021

Polymers

102

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Geopolymer materials have been gaining ground in the civil construction sector not only for having superior physical properties when compared to conventional cement, but also for being less harmful to the environment, since the synthesis of the geopolymer does not release toxic gases or require high energy costs. On the other hand, geopolymer materials like cementitious matrices have low flexural strength and have fragile breakage. To overcome these deficiencies, the insertion of fibers in geopolymeric matrices has been evaluated as a solution. Although most research on this practice focuses on the use of synthetic fibers, the use of natural fibers has been growing and brings as an advantage the possibility of producing an even more ecological material, satisfying the need to create eco-friendly materials that exists today in society. Thus, this paper aimed to, through the evaluation of research available in the literature, understand the behavior of fibers in geopolymer matrices, identify similarities and differences between the performance of geopolymer composites reinforced with natural and synthetic fibers and, understanding that it is possible, point out ways to optimize the performance of these composites.

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The Influence of Chemical and Thermal Treatments on the Diss Fiber Hygroscopic Behaviors

Cited by 11 publications

References 43 publications

Abaca fiber as an efficient reinforcement for high mechanical performance in metakaolin‐based geopolymers

Abaca fiber as an efficient reinforcement for high mechanical performance in metakaolin‐based geopolymers

Impact of distinct alkaline treatment on natural plant fibre reinforced polymer composites

Natural Fibers as an Alternative to Synthetic Fibers in Reinforcement of Geopolymer Matrices: A Comparative Review

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