A brief review on the chemical modifications of lignocellulosic fibers for durable engineering composites

Saha, Prosenjit; Chowdhury, Sukanya; Roy, Debasis; Adhikari, Basudam; Kim, Jin Kuk; Thomas, Sabu

doi:10.1007/s00289-015-1489-y

Cited by 71 publications

(50 citation statements)

References 116 publications

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“…Barreto et al [154] found that composites containing alkali-treated fibre bundles have better mechanical properties than those with untreated fibre bundles. However, the effectiveness of the alkali treatment of PF can only be increased further by conducting the treatment at elevated temperatures as the heat energy would provide some additional catalytic effect in breaking the hydrogen bonds within the fibrils [155]. In this treatment, the concentration of the alkali solution, operational temperature, temperature treatment time, material strength, and the applied additives are parameters to be considered.…”

Section: Chemical Methodsmentioning

confidence: 99%

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Ahmad

Hamid

Osman

2019

Advances in Civil Engineering

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This paper highlights the physical and chemical surface modifications of plant fibre (PF) for attaining suitable properties as reinforcements in cementitious composites. Untreated PF faces insufficient adhesion between the fibres and matrix due to high levels of moisture absorption and poor wettability. These conditions accelerate degradation of the fibre in the composite. It is also essential to reduce the risk of hydrophilic PF conditions with surface modification, to enhance the mechanical properties of the fibres. Fibres that undergo chemical and physical modifications had been proven to exhibit improved fibre-matrix interfacial adhesion in the composite and contribute to better composite mechanical properties. This paper also gives some recommendations for future research on chemical and physical modifications of PF.

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Section: Chemical Methodsmentioning

confidence: 99%

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Ahmad

Hamid

Osman

2019

Advances in Civil Engineering

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“…CNSL polymerised with acid oxidisers such as HNO 3 has been proved to be excellent for water resistant surface coatings [21]. Polymerised CNSL can modify fibre surface by forming hydrophobic, degradation-resistant coating [22]. Application of CNSL in combination with copper sulphate could extend the life of coconut thatch to 4 years [23].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Biological Resistance of Surface Modified Coir Geotextiles

Sumi¹,

Unnikrishnan²,

Mathew³

2016

Int. J. of Geosynth. and Ground Eng.

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Results of detailed experimental studies carried out to investigate the resistance of coir geotextiles modified using cashew nut shell liquid (CNSL) to attack of biological organisms are reported. A mixed spore suspension composed of four fungal stains, Chaetomium indicum, Curvularia lunata, Aspergillus fumigatus and Penicillium rubrum was used to study microbial susceptibility of coir geotextiles in humid warm atmosphere. Soil burial studies were carried out under controlled conditions for a period of 240 days to learn the behaviour of geotextiles in contact with specially prepared soil containing a variety of microorganisms. A field study was carried out to investigate the behaviour of coir geotextiles in subterranean termite mounds. The improved properties of modified coir geotextiles were substantiated on the basis of weight loss, moisture absorption, tensile strength and surface morphology. The results show that biological resistance of coir geotextiles was greatly improved by modification with CNSL. Tensile strength of unmodified samples reduced to 19 % whereas modified geotextiles retained 76 % of the initial tensile strength at the end of 240 days of soil burial. SEM images affirm that modification of coir with CNSL obtained in the present work could close the pores on fibre surface and delay biological degradation considerably.

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“…Chemical modification of plant fibers is one of the more interesting solutions to improve the fiber-matrix interface and modify the fiber properties. This modification can be performed by various treatments (Ali et al, 2016;Bledzki et al, 1996;George et al, 2001;Hassan and Wagner, 2016;Le Moigne et al, 2018;Saha et al, 2016): impregnation, chemical coupling, enzymatic, corona, plasma, UV irradiation, gamma or electron beam irradiation.…”

Section: Introductionmentioning

confidence: 99%

Chemical treatments of flax fibers – Control of the diffusion of molecules into the fiber structure

Abdallah

Teixeira

Chala

et al. 2019

Industrial Crops and Products

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A B S T R A C TThis study concerns the control of the diffusion of molecules and macromolecules in the structure of flax fibers during the impregnation step of a radiation grafting procedure. In this work we essentially focused on the impact of the conditions used during the impregnation of flax fabrics on localization of the treatment agent in the fibers structure. In a first step fabrics were impregnated by dipping them into a solution containing different chemical monomers, polymers or copolymers combined with various solvents. After solvent elimination, fibers were characterized by SEM/EDX to evaluate the presence of the treatment agents in their structure. Influences of treatment agent and solvent combination and duration of the impregnation step were evaluated. The re-gioselective localization at the surface or the presence in the whole fiber can be obtained through a suitable choice of the treatment agent and the solvent. The duration of the impregnation process can also modify this localization when the affinity between the treatment agent and the solvent is low. Two new strategies of double functionalization were successfully developed. The first one is based on the repetition of the irradiation sequence (impregnation, irradiation, washing) on the same sample but with change of the treatment agent for the second cycle. The second strategy is based on a single impregnation step with a regioselective localization of the treatment agents due to their differences of affinity with solvent used.

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A brief review on the chemical modifications of lignocellulosic fibers for durable engineering composites

Cited by 71 publications

References 116 publications

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Physical and Chemical Modifications of Plant Fibres for Reinforcement in Cementitious Composites

Experimental Investigations on Biological Resistance of Surface Modified Coir Geotextiles

Chemical treatments of flax fibers – Control of the diffusion of molecules into the fiber structure

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