Effect of fiber surface-treatments on the properties of laminated biocomposites from poly(lactic acid) (PLA) and kenaf fibers

Composites Science and Technology

Volume 68, Issue 2, February 2008, Pages 424-432

(Article)

Huda, M.S.^a, 

Drzal, L.T.^a, 

Mohanty, A.K.^b, 

Misra, M.^a 

^a  Composite Materials and Structures Center, Michigan State University, 2100 Engineering Building, East Lansing, MI 48824, United States
^b  School of Packaging, Michigan State University, 130 Packaging Building, East Lansing, MI 48824, United States 

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Abstract

Kenaf fiber reinforced polylactic acid (PLA) laminated composites were prepared by compression molding using the film-stacking method. The objective of this study was to evaluate the mechanical and thermal properties of these composites as a function of modification of kenaf fiber by using alkalization and silane-treatments. It was found that both silane-treated fiber (FIBSI) reinforced composite and alkali treated fiber (FIBNA) reinforced composite offered superior mechanical properties compared to untreated fiber (FIB) reinforced composite. The alkali- followed by silane-treated fiber (FIBNASI) reinforced composite also significantly improved mechanical properties. The effects of temperature on the viscoelastic properties of composites were studied by dynamic mechanical analysis (DMA). The heat deflection temperature (HDT) of the PLA laminated composites is significantly higher than that of neat PLA resin. Moreover, morphological studies by scanning electron microscopy (SEM) demonstrated that better adhesion between the fiber and the matrix was achieved. It was found that standard PLA resins are suitable for the manufacture of kenaf fiber reinforced laminated biocomposites with useful engineering properties. © 2007 Elsevier Ltd. All rights reserved.

Author keywords

A. Material: Short-fiber composites; B. Property: Impact behavior; C. Analysis: Stress transfer; D. Testing: Scanning electron microscopy (SEM); E. Processing: Heat treatment

Indexed keywords

Engineering controlled terms: Compression molding; Heat treatment; Kenaf fibers; Laminated composites; Mechanical properties; Silanes; Surface treatment; Thermodynamic properties; Viscoelasticity

Engineering uncontrolled terms: Film-stacking method; Heat deflection temperature; Kenaf fiber reinforced laminated biocomposites; Poly(lactic acid)

Engineering main heading: Fiber reinforced materials

PaperChem Variable: Alkalization; Compression Molding; Heat Treatment; Kenaf; Laminates; Mechanical Properties; Reinforced Plastic; Silanes; Surface Treatment; Thermal Properties; Viscoelasticity

GEOBASE Subject Index for World Textile Abstracts: fiber reinforced composite; kenaf fiber; laminate; mechanical property; surface modification; temperature; thermal property; viscoelasticity

ISSN: 02663538 CODEN: CSTCESource Type: Journal Original language: English

DOI: 10.1016/j.compscitech.2007.06.022Document Type: Article

  Misra, M.; Composite Materials and Structures Center, Michigan State University, 2100 Engineering Building, United States;
© Copyright 2008 Elsevier B.V., All rights reserved.

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