Table of Contents
ISRN Chemical Engineering
Volume 2012 (2012), Article ID 263975, 7 pages
Research Article

Effect of Variation Aluminum Oxide Concentration on the Modified Novolac Stalk Composite

Cellulose and Paper Department, National Research Center, Dokki, 12622 Giza, Egypt

Received 9 February 2012; Accepted 20 March 2012

Academic Editors: C. Chen, A. Gervasini, and R. Mariscal

Copyright © 2012 Magda G. El-Meligy 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.


Strength properties and water repellency of cotton stalk fibers esterified with propionic anhydride that are used as reinforcing of novolac resin were greatly improved than untreated. Adding aluminum oxide to the prepared composite improved bending strength and enhanced water repellant. The alternating current conductivity and dielectric constant were greatly enhanced at different frequencies by adding aluminum oxide. The more percent of aluminum oxide, the more value of alternating current conductivity and lower value of dielectric constant were obtained at different frequencies. Infrared and X-ray diffraction as well as scanning electron microscope were studied.