Effects of chemical composition, mild alkaline pretreatment and particle size on mechanical, thermal, and structural properties of binderless lignocellulosic biopolymers prepared by hot-pressing raw microfibrillated Phoenix dactylifera and Cocos nucifera fibers and leaves

Alharbi, Mohammed Abdullah Hamad; Hirai, Shinji; Tuấn, Hoàng Anh; Akioka, Shota; Shoji, Wataru

doi:10.1016/j.polymertesting.2020.106384

Cited by 45 publications

(18 citation statements)

References 60 publications

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“…In the case of the physical approach, the chemical structures are not changed, but the adhesion property between the biofiber and the matrix is improved through enhancing the interfacial adhesion [106]. On the other hand, extensive studies have been reported for chemical treatment methods of biofibers, such as BC production [107,108]. The compatibility of biofibers can be increased by using surface pretreatments, which reduce the dependency on synthetic fiber-based composites.…”

Section: Surface Treatment Of Biofibers Before Composite Formationmentioning

confidence: 99%

Potential Natural Fiber Polymeric Nanobiocomposites: A Review

2020

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Composite materials reinforced with biofibers and nanomaterials are becoming considerably popular, especially for their light weight, strength, exceptional stiffness, flexural rigidity, damping property, longevity, corrosion, biodegradability, antibacterial, and fire-resistant properties. Beside the traditional thermoplastic and thermosetting polymers, nanoparticles are also receiving attention in terms of their potential to improve the functionality and mechanical performances of biocomposites. These remarkable characteristics have made nanobiocomposite materials convenient to apply in aerospace, mechanical, construction, automotive, marine, medical, packaging, and furniture industries, through providing environmental sustainability. Nanoparticles (TiO2, carbon nanotube, rGO, ZnO, and SiO2) are easily compatible with other ingredients (matrix polymer and biofibers) and can thus form nanobiocomposites. Nanobiocomposites are exhibiting a higher market volume with the expansion of new technology and green approaches for utilizing biofibers. The performances of nanobiocomposites depend on the manufacturing processes, types of biofibers used, and the matrix polymer (resin). An overview of different natural fibers (vegetable/plants), nanomaterials, biocomposites, nanobiocomposites, and manufacturing methods are discussed in the context of potential application in this review.

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Section: Surface Treatment Of Biofibers Before Composite Formationmentioning

confidence: 99%

Potential Natural Fiber Polymeric Nanobiocomposites: A Review

2020

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“…[3,4] Natural fibers were adopted by major engineering markets such as aerospace, construction, and automotive industries due to their eco-friendliness, stronger performance-price ratio, and lighter weight. [5][6][7] Despite of all the benefits, there are a few disadvantages of using natural fibers as reinforcement in polymer-based composites. They are low wettability, high moisture absorption, and incompatibility with polymers used as matrices in the manufacturing of composite materials.…”

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confidence: 99%

Characterization of chemically treated new natural cellulosic fibers from peduncle of Cocos nucifera L. Var typica

Bright¹,

Selvi²,

Hassan

et al. 2021

Polymer Composites

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The aim of this study is to look into the effect of chemical treatments on fibers extracted from the unbranched portion of the peduncle of the coconut tree (Cocos nucifera L. Var typica) for use as reinforcement in polymer composites. The extracted coconut tree peduncle (CTP) fibers were treated with 5% alkali, 6% benzoyl peroxide, 0.5% potassium permanganate, and 1% stearic acid. The chemical composition, surface morphology, mechanical properties, crystallinity, and thermal decomposition of chemically treated CTP fibers were thoroughly investigated. The chemical analysis shows that fibers treated with 0.5% potassium permanganate had a maximum cellulose content of 58.05 wt% after hemicellulose, lignin, and wax were removed from the fiber. This has been due to the chemically treated fiber's improved crystallinity index, crystalline size, tensile strength, kinetic activation energy, and thermal stability. The existence of chemical functional groups is confirmed by Fourier transform infra-red analysis, and major elements such as carbon, nitrogen, and oxygen are quantified by energy dispersive X-ray spectroscopy analysis in chemically treated fibers. The surface of the fibers has become roughened as a result of chemical treatments, as shown by the morphological analysis performed using scanning electron microscopy. Among the chemical treatments tested, fibers treated with 0.5% potassium permanganate demonstrated superior thermo-mechanical properties for use as bioreinforcement in high performance polymer composites.chemical treatment, coconut tree peduncle fiber, physio-mechanical properties, thermal characteristics | INTRODUCTIONThe use of natural fibers in conjunction with polymeric materials in the composite fabrication process has resulted from the increased carbon footprint and compulsion toward sustainable manufacturing. This scenario has prompted researchers to investigate hemp, flax, jute, and sisal fibers for use as an eco-friendly alternative to glass

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“…Figure d shows the mass loss rate curves of the samples where RW, HMRW, and HMEW showed decomposition peaks consisting of a combination of two peaks between 250 and 380 °C, with the maximum values located at 290 and 350 °C, corresponding to the decomposition of hemicellulose and cellulose. , The decomposition of lignin continues throughout the process, and the wider temperature range is due to its complex structure, especially the presence of Cα-Cβ-Cγ side chains and different kinds of functional groups on the aromatic ring . Since the β-O-4 structures in butylated lignin and guaiacol-based lignin are cleaved by bases, and the smaller groups exhibit poor heat resistance, this leads to the decomposition peak of HMPW appearing at lower temperatures .…”

Section: Resultsmentioning

confidence: 99%

Innovative Conversion of PretreatedBuxus sinicainto High-Performance Biocomposites for Potential Use as Furniture Material

Ren

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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Traditional wood-based panels are usually made from large-diameter trees and rely on adhesives for compactness, which negatively impacts the environment and human health. However, the widely distributed small-diameter shrubs are good raw materials for wood-based panels with abundant fibers, but are often under-exploited. This research reports the preparation of self-bonding biocomposites from Buxus sinica by an innovative combined approach of extraction, alkali treatment, and hot molding. The resulted biocomposites show better mechanical properties in which the flexural modulus (7.79 GPa) and the tensile modulus (4.33 GPa) were 5 times and 1.7 times higher than the conventional fiberboard, respectively, and also demonstrated better hydrophobicity than fiberboard, which could be due to the layer of lignin that formed on its surface preventing the infiltration of water. To sum up, the biocomposites prepared from small-diameter shrubs meet the requirement of the furniture and architectural decoration materials, suggesting that the proposed approach can be used to produce high-performance biocomposites.

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Effects of chemical composition, mild alkaline pretreatment and particle size on mechanical, thermal, and structural properties of binderless lignocellulosic biopolymers prepared by hot-pressing raw microfibrillated Phoenix dactylifera and Cocos nucifera fibers and leaves

Cited by 45 publications

References 60 publications

Potential Natural Fiber Polymeric Nanobiocomposites: A Review

Potential Natural Fiber Polymeric Nanobiocomposites: A Review

Characterization of chemically treated new natural cellulosic fibers from peduncle of Cocos nucifera L. Var typica

Innovative Conversion of PretreatedBuxus sinicainto High-Performance Biocomposites for Potential Use as Furniture Material

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