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Title: | The influence of hydroxyapatite modification on the cross-linking of polydimethylsiloxane/HAp composites | Authors: | Jovanovic, J Adnađević, Borivoj Kicanovic, M Uskokovic, D |
Keywords: | Cross-linking;DSC;HAp modification;IR spectroscopy;PDMS/HAp composites | Issue Date: | 25-Dec-2004 | Journal: | Colloids and surfaces. B, Biointerfaces | Abstract: | Hydroxyapatite (HAp) was modified by the action of various hydrophobic agents based on silicon-containing compounds. The influence of the type of applied agent on the thermodynamic and kinetic parameters of the cross-linking of poly(dimethyl siloxane)/HAp composites was investigated. All the modified HAp particles became hydrophobic and these samples were used to synthesize the polysiloxane/hydroxyapatite composites (PDMS/HAp). The possible modes of interaction between the hydroxyapatite and hydrophobing agents were discussed. The most probable interaction between hydroxyapatite and the applied hydrophobing agents is hydrogen bonding. PDMS/HAp composites were formed directly in the cell of the DSC and cross-linking was investigated in situ. It was determined that the introduction of hydroxyapatite into polysiloxane matrices changed the enthalpy of cross-linking, as well as the activation energy of cross-linking and reaction order, while the introduction of modified HAp led to thermodynamic and kinetic parameters more similar to those of the cross-linking of unfilled elastomer. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/1519 | ISSN: | 0927-7765 | DOI: | 10.1016/j.colsurfb.2004.08.013 |
Appears in Collections: | Journal Article |
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