Tensile behaviour of modified bamboo–glass fibre reinforced hybrid composites

Abstract

The tensile behaviour of randomly oriented, short bamboo bre reinforced polypropylene (BFRP) and short bamboo-glass bre reinforced polypropylene (BGFRP) hybrid composites fabricated by injection moulding have been studied in an eVort to develop low cost, durable natural bre reinforced composites. The eVects of bre loading, bre length, and coupling agent (maleic anhydride-graft-polypropylene (MAPP) ) on the tensile behaviour of BGFRP were examined. The eVect of chemical treatment of both bamboo and glass bres, using alkali, silane, and chitosan solutions, on the tensile behaviour of BGFRP was also examined, with the aim of enhancing the environmental durability of the natural bre composite. Compared with the modulus of un lled polypropylene, a signi cant improvement in tensile modulus was seen in BFRP and BGFRP, while the tensile strength showed only moderate improvement. The tensile modulus of BFRP increased by more than 100% whereas an increment of up to 300% was observed for BGFRP, compared with un lled PP. An 11% increase was observed in the tensile strength of samples with a PP-MAPP matrix, compared with those without MAPP. However, the coupling agent had no noticeable eVect on tensile modulus. A BGFRP sample with a bamboo bre length of 1-6 mm showed the best results in terms of tensile strength and modulus, among other samples with shorter bamboo bre length. All BGFRP samples containing modi ed bres showed higher tensile strength and modulus than unmodi ed ones. PRC/1786

Intraply and interply hybrid composites based on E‐glass and poly(vinyl alcohol) woven fabrics: tensile and impact properties

“…As far as polymer matrix composites are concerned, most of the available literature data refer to carbon/glass,6–12 carbon/Kevlar12–17 and carbon/ultra‐high‐modulus‐polyethylene (UHMPE) 17–25 fibre‐reinforced hybrids, with the main purpose being to improve the energy‐absorbing capability of carbon fibres. Other hybrid systems recently investigated are based on carbon/nylon,17 aramid/UHMPE17, 26, 27 and UHMPE/glass28 biofibre (pineapple leaf, sisal, bamboo fibres)/glass 29–32. Sometimes, a ‘hybrid effect’, briefly defined as a positive deviation of a certain property from the ‘rule of mixtures’, have been reported 33, 34.…”

Bamboo Fiber Processing, Properties, and Applications

“…By the addition of glass fi ber by 20 % mass the tensile modulus of bamboo glass fi ber reinforced polypropylene composite increases by 12.5 %. The reduction of tensile modulus in bamboo glass fi ber reinforced poly propylene hybrid composites is two times more than reduction of tensile modulus in bamboo fi ber reinforced poly propylene composites after 1,200 h of aging in water (Thwe and Liao 2002b ). Tensile modulus of poly propylene based bamboo composites which use steam exploded fi bers increases to about 30 %, due to well impregnation and reduction in void numbers (Okubo et al 2004 ).…”

“…The tensile strength of bamboo fi ber reinforced epoxy resins is calculated to be 200.5 MN m −2 (Jain et al 1992 ). The tensile strength of short bamboo glass fi ber reinforced polypropylene composites is best at the fi ber length of 1-6 mm (Thwe and Liao 2002b ).…”

Polyolefin composites with natural fibers and wood‐modification of the fiber/filler–matrix interaction

“…Applied to lignocellulosic natural fibers, mercerization also reduces the lignin‐ and hemicellulosics‐content, which in turn can improve tensile properties 81. For flax and jute fibers, improvements of 15%–40% in Young's modulus and tensile strength as a result of mercerization have been reported 82. Goda et al applied mercerization to ramie fibers.…”

“…Fibrillation, meaning a splitting of fiber bundles into filaments, increases the surface available for fiber–matrix interaction, and also the aspect ratio, thus potentially improving the material properties of composites (Figure 9). 11, 82 Mercerization also tends to increase the fiber surface roughness. This in turn improves the potential for stress transfer through mechanical interlocking at the fiber–matrix interface 36, 85, 86.…”