Preparation of Nanosilver Loaded Calcium Phosphate by In Situ Phase Conversion Process

Faungchat Thammarakcharoen; K. Wasoontararat; Jintamai Suwanprateeb

doi:10.4028/www.scientific.net/AMR.506.254

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 506Preparation of Nanosilver Loaded Calcium Phosphate...

Preparation of Nanosilver Loaded Calcium Phosphate by In Situ Phase Conversion Process

Abstract:

The preparation of nanosilver loaded calcium phosphate aiming to enhance the antimicrobial performance by converting calcium sulfate hemihydrate based materials to calcium phosphate in the presence of silver nitrate (ranging 0.001-0.1 M) using low temperature phosphorization technique at 80 °C for 24 hours was performed. Phase composition, mechanical properties and microstructure of the resulting structures were characterized by x-ray diffraction, three-point bending and transmission electron microscopy techniques. Hydroxyapatite and monetite were found to be the main phases in the converted samples with different amount of residual calcium sulfate depending on the initial silver nitrate concentration in the converting media. Spherical-shaped silver nanoparticles were observed to distribute within the cluster of calcium compound crystals having average particle size in the range of 3.1-11.6 nm. Flexural modulus and strength of converted samples were observed to decrease from 1991 to 860 MPa and from 4.1 to 1.9 MPa respectively with increasing silver nitrate concentration from 0.001 to 0.1 M.

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Periodical:

Advanced Materials Research (Volume 506)

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254-257

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https://doi.org/10.4028/www.scientific.net/AMR.506.254

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April 2012

Authors:

Faungchat Thammarakcharoen, K. Wasoontararat, Jintamai Suwanprateeb

Keywords:

Antimicrobial, Bioceramic, Phosphorization

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