Surface modification techniques for the preparation of different novel biofibers for composites

Abstract

This chapter reports on the various physical and chemical methods used in modifying the natural fibers properties for application in reinforcing composites. Low cost, low density and biodegradable nature of bio fibers have attracted composite industries to develop various useful products out of them. Nevertheless, associated disadvantages with these fibers are that they have poor compatibility with matrix, relative high water absorption capacity and sticking in bundles. For eradication of such unwanted characteristics, several physical and chemical treatments have been examined by the researchers. These treatments tend to alter the surface morphology and chemical structure for enhancing the adhesive strength between fiber and matrix. Mechanisms that are involved in this enhancement are the increase in fiber surface roughness and alteration in chemical polarity of natural fibers.