An analysis of structure and properties of a natural cellulosic fiber (Leafiran)

Mortazavi, Sayed Majid; Moghaddam, Meghdad Kamali

doi:10.1007/s12221-010-0877-z

Cited by 44 publications

(20 citation statements)

References 9 publications

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“…The samples were thereafter placed in humidity chamber at 65% RH at 21 °C for 24 h [29,30]. To obtain statistically significant number of samples, three repetitions were carried out for each test and twenty fibers samples were randomly selected for each test.…”

Section: Methodsmentioning

confidence: 99%

In-Depth Analysis of the Structure and Properties of Two Varieties of Natural Luffa Sponge Fibers

Chen

Zhang

et al. 2017

Materials

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The advancement in science and technology has led to luffa sponge (LS) being widely used as a natural material in industrial application because of its polyporous structure and light texture. To enhance the utility of LS fibers as the reinforcement of lightweight composite materials, the current study investigates their water absorption, mechanical properties, anatomical characteristics and thermal performance. Hence, moisture regain and tensile properties of LS fiber bundles were measured in accordance with American Society for Testing and Materials (ASTM) standards while their structural characteristics were investigated via microscopic observation. Scanning electron microscopy (SEM) was used to observe the surface morphology and fractured surface of fiber bundles. The test results show that the special structure where the phloem tissues degenerate to cavities had a significant influence on the mechanical properties of LS fiber bundles. Additionally, the transverse sectional area occupied by fibers in a fiber bundle (SF), wall thickness, ratio of wall to lumen of fiber cell, and crystallinity of cellulose had substantial impact on the mechanical properties of LS fiber bundles. Furthermore, the density of fiber bundles of LS ranged within 385.46–468.70 kg/m3, significantly less than that of jute (1360.40 kg/m3) and Arenga engleri (950.20 kg/m3). However, LS fiber bundles demonstrated superior specific modulus than Arenga engleri.

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Section: Methodsmentioning

confidence: 99%

In-Depth Analysis of the Structure and Properties of Two Varieties of Natural Luffa Sponge Fibers

Chen

Zhang

et al. 2017

Materials

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“…These characteristic bands are also present in hemicellulose. The presence of a vibration at 1724 cm -1 , being characteristic for unconjugated carbonyl groups (C=O) 25 , is representative for hemicellulose, as well as a band at 1246 cm -1 , which is associated to the acetyl group 24 . The typical C-H and O-H stretching vibrations are also present in lignin.…”

Section: Ir Region (Cm -1 )mentioning

confidence: 99%

“…On the other hand, for fibers treated with NaOH and Ca(OH) 2 , the lignin and hemicellulose peaks were not observed, and this is especially true for any fiber treated with NaOH. Hence, removing surface components with alkali allowed the fiber to soak up an even larger volume of moisture on account of the exposure of OH groups belonging to the cellulose, making the alkali treated fiber more hydrophilic 25 .…”

Section: Microscopic Characterizationmentioning

confidence: 99%

Effect of Alkaline and Hot Water Treatments on the Structure and Morphology of Piassava Fibers

et al. 2018

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The effect of alcaline and hot water surface treatments of piassava Attalea funifera fibers was investigated. The efficiency of each treatment was evaluated by Fourier transform infrared spectroscopy, X-ray diffractometry, optical microscopy, scanning electron microscopy and atomic force microscopy. The alkaline treatments were effective in removing the superficial lignin layer from the fiber, while the hot water treatment was not. Treatment with hot water and NaOH caused fiber defibrillation. NaOH was most effective in promoting both, a decrease in fiber diameter and an increase in fiber surface area. Treatment with Ca(OH) 2 led to the formation of a CaCO 3 layer deposited on the fiber, preventing defibrillation. The crystalline structure of the fiber was not altered by any of the treatments, maintaining type I cellulose.

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“…The salient drawbacks with natural fibers when commingled in composites is their relatively high moisture absorption tendency and poor compatibility with the matrix (Gupta et al, 2016;Venkateshwaran et al, 2011). These negative characteristics are primarily due to their inherent heterogenous content such as carbohydrates (cellulose, hemicellulose, starch), lignin, pectin, waxes, fats and other polar compounds (Mortazavi & Moghaddam, 2010;Sun & Cheng, 2002). Thus, weak interface adhesion between natural fibers and polymer matrices are due to the differences in the wettability of natural fibers (inherently hydrophilic) and the polymer matrix (usually hydrophobic).…”

Section: Introductionmentioning

confidence: 99%

Effects of alkali treatment on the mechanical and thermal properties of sisal/cattail polyester commingled composites

Mbeche

Omara

2020

PeerJ Materials Science

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Environmental and energy conservation pressure has led to a dramatic increase in the need for economically feasible lightweight materials that can be better substitutes for non-biodegradable materials in reinforced composites. In this study, the mechanical and thermal properties of polyester resin composites hybridized with a blend of untreated and alkali treated sisal (Agave sisalana) and cattail (Typha angustifolia) fibers were evaluated. Composites were fabricated by a hand lay-up technique at an optimal hybrid fiber weight fraction of 20 wt% and a constant sisal/cattail fiber blend ratio of 75/25. Flexural, tensile, compressive and impact strengths and moduli, as well as thermal conductivity of the composites, were evaluated following ASTM and ISO test methods. Analytical results indicated that alkali pre-treatment of the fibers enhanced the mechanical properties of the hybrid polyester composites though only marginal differences were recorded in the thermal conductivity of the composites fabricated with treated and untreated fiber blends. Morphological examination revealed that the major failure modes were fiber pull-outs and fiber fracture in composites fabricated with untreated and treated fiber blends, respectively. The composites produced could find non-structural applications as ceiling boards, electronic and food packaging materials but their properties such as wettability, crystallinity, flammability and other thermal properties need to be further investigated.

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An analysis of structure and properties of a natural cellulosic fiber (Leafiran)

Cited by 44 publications

References 9 publications

In-Depth Analysis of the Structure and Properties of Two Varieties of Natural Luffa Sponge Fibers

In-Depth Analysis of the Structure and Properties of Two Varieties of Natural Luffa Sponge Fibers

Effect of Alkaline and Hot Water Treatments on the Structure and Morphology of Piassava Fibers

Effects of alkali treatment on the mechanical and thermal properties of sisal/cattail polyester commingled composites

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