A Review on Surface Modification of Bast Fibre as Reinforcement in Polymer Composites

Abstract

Abstract:In the past few decades, natural fibres have shown remarkable achievements in the field of reinforced polymer composites because of environmental issues and petroleum crises. Biodegradable fibres (bast, animals hair, stalk, seed etc.) has been used by researchers because of its low cost, low density, abundant in nature, high stiffness etc. over other man-made fibers. The majority of plant fibers which are being considered as reinforcement materials for polymer composites are bast fibers (the outer cell layers of various plants) such as hemp, jute, kenaf, grewia optiva etc. Among these fibers Grewia optiva is recently explored fiber and is presently being assessed as reinforcement in polymeric composites. In this paper, we have discussed and reviewed the extraction process of Grewia optiva fibers and various surface treatments such as graft copolymerization, mercerization, Benzoylation and silane methods for enhancement of the surface adhesion properties of Grewia optiva fibres with their matrice and the effects of these surface treatments on mechanical properties of such fabricated composites.

Bast fibres: structure, processing, properties, and applications

“…Modifying the surface properties of bast fibres represents a promising approach towards improving bast fibre characteristics and increasing their suitability for large industrial-scale use. (11) Bast fibres have many additional applications including insulation, automotive, construction, biomedical, military, marine, sports, electrical, and geotextile.…”

“…For example, they have been used in temporary roads over soft land, agricultural and automotive exterior panels, acoustic and thermal insulation, furniture, recreational sports products, and marine products [9,10]. Biocomposites made from bast fibres are reliable, inexpensive, lightweight, non-toxic, and structurally sound [11].…”

Prototype development for composite mud house for Apis cerana using local ingredients to conserve indigenous beekeeping

“…The tensile strength of pure soil is generally less [10] , so clayey soil undergoes problem of swelling and shrinkage during and dry conditions respectively, which generate cracks or voids in the soil (Figure 4). The dry density of pure soil is higher, but to avoids such problems of swelling and shrinkage, the plant fibre, i.e., Grewia optiva bark (shail) was mixed with the soil [8] . Grewia optiva fibre is reasonable, intense, economical, light in weight, less hazardous, and can potentially be used as structural materials [8] .…”

“…The dry density of pure soil is higher, but to avoids such problems of swelling and shrinkage, the plant fibre, i.e., Grewia optiva bark (shail) was mixed with the soil [8] . Grewia optiva fibre is reasonable, intense, economical, light in weight, less hazardous, and can potentially be used as structural materials [8] . Secondly, mixing of fibre with the clayey soil can provide insulation to the mud hive because natural fibre has much insulation strength (Kumar et al, 2017).…”

“…Grewia optiva fibre is reasonable, intense, economical, light in weight, less hazardous, and can potentially be used as structural materials [8] . Secondly, mixing of fibre with the clayey soil can provide insulation to the mud hive because natural fibre has much insulation strength (Kumar et al, 2017). The plant fibre mixed with clayey soil may help to maintain the internal temperature of the mud hive.…”