Influence of Alginate Concentration on the Diametral Tensile Strength of Hydroxyapatite (HAp) Block

Abstract:

The influence of alginate concentration on the diametral tensile strength (DTS) of hydroxyapatite (HAp) block was investigated. Alginate solution with concentration of 1%, 3% and 5% was prepared through neutral extraction from cultivated sargassum polycystum brown seaweed obtained from Semporna, Sabah, Malaysia. Commercially available HAp powder was pressed uniaxially at 3 MPa to obtain the HAp block. The HAp block was then sintered at 900°C. The sintered HAp block was then immersed in alginate solution under vacuum condition for 24 hours. DTS value of the HAp block decreases with increasing alginate concentration. Porosity measurement increases with the increase in alginate concentration used. The decrease in the DTSvalue with increasing alginate concentration is due to the higher viscosity at higher alginate concentration and thus limited the amount of alginate being penetrate into the HAp block.

• Periodical: Materials Science Forum (Volume 819)
• Pages: 373-378
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.819.373
• Online since: June 2015
• Authors: Nurazreena Ahmad, Chew Zhu Ann, Mariatti Jaafar
• Keywords: Alginate, Concentration, Diametral Tensile Strength, Hydroxyapatite Block

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