Effects of chemical versus enzymatic processing of kenaf fibers on poly(hydroxybutyrate-co-valerate)/poly(butylene adipate-co-terephthalate) composite properties

Yang, Bing; Nar, Mangesh; Visi, David K.; Allen, Michael S.; Ayre, Brian G.; Webber, Charles L.; Lu, Hongbing; D’Souza, Nandika Anne

doi:10.1016/j.compositesb.2013.09.022

Cited by 21 publications

(7 citation statements)

References 16 publications

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“…Further we studied the effect of kenaf fiber length and variation of bast fiber retting using chemical and enzymatic retting in poly(hydroxybutyrate‐ co ‐valerate)/poly(butylene adipate‐ co ‐terephthalate) polymer blends. The enzymatic retted fibers produced higher reinforcement than chemical retting . Kenaf fibers have been reported to improve tensile and flexural strength with 30 and 40% by weight in poplypropylene .…”

Section: Introductionmentioning

confidence: 96%

Rigid polyurethane and kenaf core composite foams

Nar

Webber

D’Souza

2014

Polymer Engineering & Sci

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Rigid PU foams are valuable in many construction applications. Kenaf is a bast fiber plant where the surface stem skin provides bast fibers whose strength‐to‐weight ratio competes with glass fiber. The higher volume product of the kenaf core is an under‐investigated area in composite applications. The naturally porous structure of kenaf‐core provides a novel reinforcement particle. In this work, foams of rigid polyurethane with 5, 10, and 15% kenaf‐core were formed. To date efforts at using it as a reinforcement have proven largely unsuccessful. This was mirrored in this effort when free expansion of the foam was utilized. However, introducing constraint during foaming resulted in reinforcement. The environmental scanning electron microscopy is used in conjunction with in‐situ microCT compression to capture the change in void fractions before and after deformation. The results show that free foaming resulted in poor reinforcement while a constrained expansion on the foam increased the reinforcement potential of the kenaf core. POLYM. ENG. SCI., 55:132–144, 2015. © 2014 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 96%

Rigid polyurethane and kenaf core composite foams

Nar

Webber

D’Souza

2014

Polymer Engineering & Sci

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“…The identification of the most appropriate natural fibre to be hybridized with glass fibre reinforced polymer composites for the fabrication of automotive component is based on functional performance, weight and product cost [18]. Hybridization of kenaf fibres with glass fibres could be used in automotive components such as bumper beam by improving the impact property.…”

Section: Introductionmentioning

confidence: 99%

Mechanical property analysis of kenaf–glass fibre reinforced polymer composites using finite element analysis

Ramesh¹,

Nijanthan²

2016

Bull Mater Sci

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Nowadays, natural fibres are used as a reinforcing material in polymer composites, owing to severe environmental concerns. Among many different types of natural resources, kenaf plants have been extensively exploited over the past few years. In this experimental study, partially eco-friendly hybrid composites were fabricated by using kenaf and glass fibres with two different fibre orientations of 0 • and 90 •. The mechanical properties such as tensile, flexural and impact strengths of these composites have been evaluated. From the experiment, it was observed that the composites with the 0 • fibre orientation can withstand the maximum tensile strength of 49.27 MPa, flexural strength of 164.35 MPa, and impact strength of 6 J. Whereas, the composites with the 90 • fibre orientation hold the maximum tensile strength of 69.86 MPa, flexural strength of 162.566 MPa and impact strength of 6.66 J. The finite element analysis was carried out to analyse the elastic behaviour of the composites and to predict the mechanical properties by using NX Nastran 9.0 software. The experimental results were compared with the predicted values and a high correlation between the results was observed. The morphology of the fractured surfaces of the composites was analysed using a scanning electron microscopy analysis. The results indicated that the properties were in the increasing trend and comparable with pure synthetic fibre reinforced composites, which shows the potential for hybridization of kenaf fibre with glass fibre. Keywords. Natural fibres; kenaf fibre; eco-friendly composites; hybrid; mechanical properties; kenaf-glass fibre composites.

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“…This double positive impact is even more pronounced in the rubbery state, where a 45% increase in E’ was observed between retting (−) and (+) at 130 °C. Yang et al also noted a similar trend using kenaf fibers mixed with PBAT-PHBV copolymer matrix composite [ 32 ]. As was highlighted for the static mechanical results, we also noticed the positive impact of retting on the viscoelastic properties.…”

Section: Resultsmentioning

confidence: 64%

How Retting Could Affect the Mechanical Behavior of Flax/Epoxy Biocomposite Materials?

et al. 2023

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This study focuses on the retting effect on the mechanical properties of flax biobased materials. For the technical fiber, a direct link was established between the biochemical alteration of technical flax and their mechanical properties. In function of the retting level, technical fibers appeared smoother and more individualized; nevertheless, a decrease in the ultimate modulus and maximum stress was recorded. A biochemical alteration was observed as the retting increased (a decrease in the soluble fraction from 10.4 ± 0.2 to 4.5 ± 1.2% and an increase in the holocellulose fractions). Regarding the mechanical behavior of biocomposites manufactured by thermocompression, a non-elastic behavior was observed for the tested samples. Young moduli (E1 and E2) gradually increased with retting. The retting effect was more pronounced when a normalization was performed (according to the fiber volume and porosity). A 40% increase in elastic modulus could be observed between under-retting (−) and over-retting (+). Moreover, the porosity content (Vp) increased overall with fiber content. Setup 3, with optimized processing parameters, was the most desirable processing protocol because it allowed the highest fiber fraction (Vf) for the lowest Vp.

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Effects of chemical versus enzymatic processing of kenaf fibers on poly(hydroxybutyrate-co-valerate)/poly(butylene adipate-co-terephthalate) composite properties

Cited by 21 publications

References 16 publications

Rigid polyurethane and kenaf core composite foams

Rigid polyurethane and kenaf core composite foams

Mechanical property analysis of kenaf–glass fibre reinforced polymer composites using finite element analysis

How Retting Could Affect the Mechanical Behavior of Flax/Epoxy Biocomposite Materials?

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