Effect of Nanoparticles to Stearic Acid Ratio for Coating

Raman, Abdul Aziz Abdul (2005) Effect of Nanoparticles to Stearic Acid Ratio for Coating. .

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Abstract

<p><font face="Arial">Due to its low cost and inert chemical properties, calcium carbonate is widely used as additive or filler to improve and enhance plastic, rubber, paper, paints and sealant products. Research has shown that by replacing micron sized particles with nano-sized particles, mechanical properties of products mentioned above can befurther improved significantly. However, during bulk storage and transport, the nano-particle tends to agglomerate because of hydrophilic and lipo-phobic nature of calcium carbonate. This results in non-uniform dispersion in the polymer matrix which weakens the interfacial interaction with polymer chain. Coating the nano-particles with inert and effective materials are commonly used to reduce agglomeration.One of the most significant aspects of coating is to determine the weight ratio of particles to stearic acid at constant temperature and mixing intensity. In this work, experiments were conducted to identify the optimum ratio at 80 'C. For this study 3 and 6wt% of stearic acid addition are investigated. The surface morphology and of coated and uncoated nanoparticles were evaluated using Scanning Electron Microscope. Analysis with SEM indicates that agglomeration can be reduced significantly by using 3wt% amount of stearic acid.</font></p>

Item Type: Other
Uncontrolled Keywords: nano-particles,calcium carbonate,stearic acid,coating,agglomeration
Subjects: University Structure > Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: MR. ADNAN YAHYA
Date Deposited: 30 Apr 2008
Last Modified: 13 Jul 2015
URI: http://repository.um.edu.my/id/eprint/58319

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