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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 941617, 7 pages
Research Article

Improvement of Mechanical Properties of Noil Hemp Fiber Reinforced Polypropylene Composites by Resin Modification and Fiber Treatment

1Centre of Excellence in Engineered Fibre Composites, University of Southern Queensland, Toowoomba, QLD 4350, Australia
2Special High Value Biomass Industry and Technology Innovation Strategic Alliance, Beijing 100082, China
3The Research Centre of China-Hemp Materials, Beijing 100082, China

Received 31 May 2013; Revised 15 August 2013; Accepted 23 August 2013

Academic Editor: Hazizan Md Akil

Copyright © 2013 Zili Yan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present study aims to improve the reinforcement of hemp fibre to polypropylene (PP) by simple resin modification and fibre treatment. Maleic anhydride grafted polypropylene (MAPP) was used as resin modifier by direct mixing with PP, and hydrophobically modified hydroxyethyl cellulose (HMHEC) was used as fibre treatment reagent by immersing fibre into its aqueous solution. The influences of fibre content, resin modification, and fibre treatment on the mechanical properties (tensile, flexural, and impact strengths) of composites were investigated. The change of interfacial bonding between fibre and resin in composites caused by MAPP and HMHEC was studied by scanning electron microscopy and dynamic mechanical analysis. Resin modification and fibre treatment were effective to enhance the mechanical properties of the composites. The improvement in interfacial bonding is quantitatively evaluated with adhesion factor.