The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: Part 2 - cashew nut shell liquid matrix

Sharifah H Aziz, Martin P Ansell

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97 Citations (Scopus)

Abstract

Long and random hemp and kenaf fibres were used in as-received condition and alkalized in a 6% NaOH solution. They were combined with cashew nut shell liquid (CNSL) resin and hot-pressed to form natural fibre, natural matrix composites. The mechanical properties of the composites were investigated to observe the effect of fibre alignment and alkalization. A general trend was observed whereby alkalized and long fibre composites gave higher flexural modulus and flexural strength with alkalized long kenaf-CNSL composite giving superior mechanical properties. A general trend was also observed for the overall mechanical test results of the composites whereby high flexural modulus and high flexural strength are associated with a low work of fracture. Wide endothermic peaks present in differential thermal analysis thermograms for all of the composites indicated the presence of moisture which leads to inferior mechanical properties. Dynamic mechanical thermal analysis carried out on the composites showed that the alkalized fibre composites have higher E prime and lower tanδ, corresponding to the trends of higher flexural modulus and lower work of fracture respectively. © 2003 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)1231-1238
Number of pages8
JournalComposites Science and Technology
Volume64
Issue number9
DOIs
Publication statusPublished - 2004

Fingerprint

Bast fibers
Hemp fibers
Thermodynamic properties
Mechanical properties
Fibers
Composite materials
Liquids
Bending strength
Kenaf fibers
Natural fibers
Differential thermal analysis
Thermoanalysis
Moisture
Resins

Keywords

  • Sodium compounds
  • Mechanical testing
  • Natural fibers
  • Fracture
  • Hot pressing
  • Fiber reinforced materials
  • Solutions
  • Bending strength
  • Thermoanalysis

Cite this

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title = "The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: Part 2 - cashew nut shell liquid matrix",
abstract = "Long and random hemp and kenaf fibres were used in as-received condition and alkalized in a 6{\%} NaOH solution. They were combined with cashew nut shell liquid (CNSL) resin and hot-pressed to form natural fibre, natural matrix composites. The mechanical properties of the composites were investigated to observe the effect of fibre alignment and alkalization. A general trend was observed whereby alkalized and long fibre composites gave higher flexural modulus and flexural strength with alkalized long kenaf-CNSL composite giving superior mechanical properties. A general trend was also observed for the overall mechanical test results of the composites whereby high flexural modulus and high flexural strength are associated with a low work of fracture. Wide endothermic peaks present in differential thermal analysis thermograms for all of the composites indicated the presence of moisture which leads to inferior mechanical properties. Dynamic mechanical thermal analysis carried out on the composites showed that the alkalized fibre composites have higher E prime and lower tanδ, corresponding to the trends of higher flexural modulus and lower work of fracture respectively. {\circledC} 2003 Elsevier Ltd. All rights reserved.",
keywords = "Sodium compounds, Mechanical testing, Natural fibers, Fracture, Hot pressing, Fiber reinforced materials, Solutions, Bending strength, Thermoanalysis",
author = "Aziz, {Sharifah H} and Ansell, {Martin P}",
year = "2004",
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TY - JOUR

T1 - The effect of alkalization and fibre alignment on the mechanical and thermal properties of kenaf and hemp bast fibre composites: Part 2 - cashew nut shell liquid matrix

AU - Aziz, Sharifah H

AU - Ansell, Martin P

PY - 2004

Y1 - 2004

N2 - Long and random hemp and kenaf fibres were used in as-received condition and alkalized in a 6% NaOH solution. They were combined with cashew nut shell liquid (CNSL) resin and hot-pressed to form natural fibre, natural matrix composites. The mechanical properties of the composites were investigated to observe the effect of fibre alignment and alkalization. A general trend was observed whereby alkalized and long fibre composites gave higher flexural modulus and flexural strength with alkalized long kenaf-CNSL composite giving superior mechanical properties. A general trend was also observed for the overall mechanical test results of the composites whereby high flexural modulus and high flexural strength are associated with a low work of fracture. Wide endothermic peaks present in differential thermal analysis thermograms for all of the composites indicated the presence of moisture which leads to inferior mechanical properties. Dynamic mechanical thermal analysis carried out on the composites showed that the alkalized fibre composites have higher E prime and lower tanδ, corresponding to the trends of higher flexural modulus and lower work of fracture respectively. © 2003 Elsevier Ltd. All rights reserved.

AB - Long and random hemp and kenaf fibres were used in as-received condition and alkalized in a 6% NaOH solution. They were combined with cashew nut shell liquid (CNSL) resin and hot-pressed to form natural fibre, natural matrix composites. The mechanical properties of the composites were investigated to observe the effect of fibre alignment and alkalization. A general trend was observed whereby alkalized and long fibre composites gave higher flexural modulus and flexural strength with alkalized long kenaf-CNSL composite giving superior mechanical properties. A general trend was also observed for the overall mechanical test results of the composites whereby high flexural modulus and high flexural strength are associated with a low work of fracture. Wide endothermic peaks present in differential thermal analysis thermograms for all of the composites indicated the presence of moisture which leads to inferior mechanical properties. Dynamic mechanical thermal analysis carried out on the composites showed that the alkalized fibre composites have higher E prime and lower tanδ, corresponding to the trends of higher flexural modulus and lower work of fracture respectively. © 2003 Elsevier Ltd. All rights reserved.

KW - Sodium compounds

KW - Mechanical testing

KW - Natural fibers

KW - Fracture

KW - Hot pressing

KW - Fiber reinforced materials

KW - Solutions

KW - Bending strength

KW - Thermoanalysis

U2 - 10.1016/j.compscitech.2003.10.002

DO - 10.1016/j.compscitech.2003.10.002

M3 - Article

VL - 64

SP - 1231

EP - 1238

JO - Composites Science and Technology

JF - Composites Science and Technology

SN - 0266-3538

IS - 9

ER -