Structure and properties of some vegetable fibres

Satyanarayana, K. G.; Ravikumar, K. K.; Sukumaran, K.; Mukherjee, P.; Pillai, Saju; Kulkarni, A. G.

doi:10.1007/bf01144699

Cited by 173 publications

(16 citation statements)

References 6 publications

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“…7,10,11 The angle between the fibre axis and the fibrils, the microfibrillar angle, is largely responsible for determining the mechanical properties of the fibre. 12 Chemical modification of the fibre surface can be used to improve the fibre-matrix adhesion resulting in improved mechanical properties of the composite. 8,13 Natural fibres, such as flax, kenaf and sisal, are used in the automobile industry since the specific modulus is comparable to that of glassreinforced composites.…”

mentioning

confidence: 99%

Prosthetic limb sockets from plant-based composite materials

Campbell

Sexton

Schaschke

et al. 2012

Prosthetics &Amp; Orthotics International

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Background: There is a considerable demand for lower limb prostheses globally due to vascular disease, war, conflict, land mines and natural disasters. Conventional composite materials used for prosthetic limb sockets include acrylic resins, glass and carbon fibres, which produce harmful gasses and dust in their manufacture.Objectives: To investigate the feasibility of using a renewable plant oil-based polycarbonate-polyurethane copolymer resin and plant fibre composite, instead of conventional materials, to improve safety and accessibility of prosthetic limb manufacture.Study Design: Experimental, bench research.Methods: Test pieces of the resin with a range of plant fibres (10.0% by volume) were prepared and tensile strengths were tested. Test sockets of both conventional composite materials and plant resin with plant fibres were constructed and tested to destruction.Results: Combinations of plant resin and either banana or ramie fibres gave high tensile strengths. The conventional composite material socket and plant resin with ramie composite socket failed at a similar loading, exceeding the ISO 10328 standard. Both wall thickness and fibre-matrix adhesion played a significant role in socket strength.Conclusions: From this limited study we conclude that the plant resin and ramie fibre composite socket has the potential to replace the standard layup. Further mechanical and biocompatibility testing as well as a full economic analysis is required.Clinical relevanceUsing readily sourced and renewable natural fibres and a low-volatile bio-resin has potential to reduce harm to those involved in the manufacture of artificial limb sockets, without compromising socket strength and benefitting clinicians working in poorer countries where safety equipment is scarce. Such composite materials will reduce environmental impact.

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mentioning

confidence: 99%

Prosthetic limb sockets from plant-based composite materials

Campbell

Sexton

Schaschke

et al. 2012

Prosthetics &Amp; Orthotics International

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“…AIR was relatively important in the leaflet, it accounted for 32% and 36% of the whole leaflet from date palm and dwarf palm tree respectively. High lignin contents were already reported for the leaf of Indian palm trees (42% of palmyrah palm tree and 28% for talipot palm tree, Satyanarayana et al 1986).…”

Section: Resultsmentioning

confidence: 82%

“…There are many parts of the date palm tree from which fibers could be extracted. Nevertheless, data available on the chemical composition and the mechanical properties of these fibers are poor or incomplete (Satyanarayana et al 1986(Satyanarayana et al , 1982Sreekala et al 1997). Prior knowledge regarding these fibers is essential for evaluation of their potential for different applications.…”

Section: Introductionmentioning

confidence: 99%

Extraction and Characterization of Fibers from Palm Tree

Tahri¹,

Ziegler-Devin²,

Ruelle³

et al. 2016

BioResources

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The characterization of fibers extracted from leaflet, the empty fruit bunches, leaf sheath, and spath of palm tree was performed. The fibers were extracted using three different procedures through chemical and /or enzymatic methods. The raw fibers studied have xylose contents between 13-22% and glucose content between 30% and 45%. The microfibrillar angle (MFA) values are in the order: bunch > spath > leaf sheath >> leaflet. Spath and leaf sheath, which naturally occur in a woven form present poor mechanical strength but could be readily used to produce cheap composites. Leaflet fibers extracted from date palm tree exhibiting a low MFA (16°), a high cellulose content, and cellulose crystallinity present the highest ultimate tensile strengths (≈ 1250 N.mm -2 ).

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“…Venkatappa Rao (2002) reported that coir geotextiles can be used for constructing low-height embankments on soft soils because of their tensile strength and resistance to biodegradation. However, the strength properties of vegetable fibres depend on various factors such as source, age, species, processing parameters, chemical constituents and internal structure (Satyanarayana et al, 1986), so each natural fibre needs to be considered on its own merits.…”

Section: Introductionmentioning

confidence: 99%

In‐soil biodegradation of palm mat geotextiles

Kugan

Sarsby

2011

Land Degrad Dev

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The tensile strength properties of Buriti palm mat geotextiles (manufactured in Brazil using low-tech, 'cottage-industry' manufacturing techniques) have been investigated with a view to using them as engineering fabrics for soil reinforcement. The rate at which the physical properties of the vegetable fibre geotextiles decline once they have been buried in soil is a key issue. Geotextiles have been buried for various time periods in a sandy soil, under both fully and partially saturated conditions, before being tested to quantify any change in tensile strength with time. It has been found that partially saturated soil is a more aggressive environment than fully saturated soil. The Buruti palm mats retained approximately 40per cent of their initial strength after burial for 1 year in fully saturated soil, but there was total loss of strength after only 9 months when mats were buried in partially saturated soil. The strength retained under fully saturated conditions is inversely proportional to the square-root of time whilst for partially saturated conditions the strength is directly proportional to the inverse of time. The palm mat geotextiles would not have sufficient durability for use in major ground strengthening applications but they do have potential for prolonging the life of unbound roads.

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Structure and properties of some vegetable fibres

Cited by 173 publications

References 6 publications

Prosthetic limb sockets from plant-based composite materials

Prosthetic limb sockets from plant-based composite materials

Extraction and Characterization of Fibers from Palm Tree

In‐soil biodegradation of palm mat geotextiles

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