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Journal of Natural Fibers Volume 5, 2008 - Issue 4
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Original Articles

Influence of Fiber Fineness, Fiber Maturity, and Nep Content on the Properties of Natural Fiber Reinforced Cotton-Epoxy Composites

N. Graupner Faserinstitut Bremen e. V. (-FIBRE-), Department Biological Materials, Sustainability and Fibre Development, Biomimetics, Am Biologischen Garten 2, D-28359, Bremen, Germany; University of Applied Sciences Bremen, Faculty 5 – Biomimetics, Biological Materials, Neustadtswall 30, D-28199, Bremen, GermanyCorrespondence[email protected]
,
H.-J. Endres University of Applied Sciences and Arts, Faculty of Mechanical and Bioprocess Engineering, Department Bio Process Engineering, Materials Based on Renewable Raw Materials, Heisterbergallee 12, D-30453, Hannover, Germany
&
J. Müssig University of Applied Sciences Bremen, Faculty 5 – Biomimetics, Biological Materials, Neustadtswall 30, D-28199, Bremen, Germany
Pages 289-315 | Received 22 Nov 2007, Accepted 26 Jun 2008, Published online: 12 Dec 2008
 
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ABSTRACT

This article reports a systematic study of the effects of two different kinds of cotton fibers on properties of composites. Both cotton fibers exhibit similar mechanical properties. However, they vary in fineness and maturity. The intention of this study is to investigate the influence of these fiber properties on the characteristics of composites.

In the present work composites with a thermosetting epoxy matrix with fiber mass proportions of 0 to 60% were produced by compression molding and tested for stiffness and impact strength.

Contrary to expectations, the best mechanical values could be obtained from the composites with coarser fibers. This phenomenon was ascribed to the lower maturity and higher feasibility of nep formation of the finer fibers.

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