Polydimethylsiloxane/Calcium Phosphates Composites: Effect of the Fillers Modification on the Cross-Linking and Surface Energy

Oscar F. Bareiro; Luis Alberto Santos

doi:10.4028/www.scientific.net/MSF.727-728.1175

Paper Titles

Extracellular Synthesis of Silica Oxide Particles by Fusarium oxysporum from Rice Husk Ash
p.1153

Lithium Disilicate Bioceramic Obtained from Alternative Silica Source, the Rice Husk
p.1158

Synthesis of Alpha-Tricalcium Phosphate by Wet Reaction and Evaluation of Mechanical Properties
p.1164

Properties of Calcium Phosfate Cement with Addition of Dispersant and Hydrogel
p.1170

Polydimethylsiloxane/Calcium Phosphates Composites: Effect of the Fillers Modification on the Cross-Linking and Surface Energy
p.1175

Effect on Mechanical Strength of Tricalcium Phosphate Cement by Additions of Sodium Alginate
p.1181

Evaluation of α-Tricalcium Phosphate Cement Obtained at Different Temperatures
p.1187

Preparation of Al₂TiO₅-Al₂O₃and Al₂TiO₅-Al₂O₃-TiO₂ Ceramics by High-Energy Ball Milling and Sintering
p.1193

Obtaining of Nanoapatite in Ti-7.5Mo Surface after Nanotube Growth
p.1199

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Polydimethylsiloxane/Calcium Phosphates Composites: Effect of the Fillers Modification on the Cross-Linking and Surface Energy

Abstract:

A potential approach to achieving the objective of favorably modulating the biological response of implantable biopolymers combined with good mechanical properties is to consider compounding the biopolymer with a bioactive nanocrystalline ceramic biomimetic material with high surface area. In this work, n-HAp (nanohydroxyapatite) and n-α-TCP (nanoα-tricalcium phosphate) powders were modified by silane coupling agent and mixed with poly (dimethyl siloxane) gum so nanocomposites could be achieved. The influence of the introduction of modified and unmodified calcium phosphate particles on the composite thermodynamics parameters of cross-linking, static contact angle and surface energy were investigated. It was found that the dispersion state of modified particles in the silicone matrix was homogeneous. The introduction of fillers into the silicone matrix changed the enthalpy of cross-linking. The addition of unmodified particles led to higher surface energy values, on the other hand, modified particles led to lower surface energy values.