Influence of precursor solution parameters on chemical properties of calcium phosphate coatings prepared using Electrostatic Spray Deposition (ESD).

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Publication year
2004Source
Biomaterials, 25, 4, (2004), pp. 641-9ISSN
Publication type
Article / Letter to editor

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Organization
Periodontology and Biomaterials
Radboudumc Extern
Journal title
Biomaterials
Volume
vol. 25
Issue
iss. 4
Page start
p. 641
Page end
p. 9
Subject
UMCN 4.3: Tissue engineering and reconstructive surgeryAbstract
A novel coating technique, referred to as Electrostatic Spray Deposition (ESD), was used to deposit calcium phosphate (CaP) coatings with a variety of chemical properties. The relationship between the composition of the precursor solutions and the crystal and molecular structure of the deposited coatings was investigated by means of X-ray diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR) and Energy Dispersive Spectroscopy (EDS). It was shown that the relative Ca/P ratio in the precursor solution, the absolute precursor concentration, the acidity of the precursor solution and the type of Ca-precursor strongly influenced the chemical nature of the deposited CaP coatings. Various crystal phases and phase mixtures were obtained, such as carbonate apatite, beta-TCP, Mg-substituted whitlockite, monetite, beta/gamma-pyrophosphate, and calcite.It was shown that carbonate plays an essential role in the chemical mechanism of coating formation. Carbonate is formed due to a decomposition reaction of organic solvents. Depending on deposition conditions, carbonate anions (a) react with acidic phosphate groups, (b) are incorporated into apatitic calcium phosphate phases, and (c) react with excessive Ca(2+) cations in case of phosphate-deficient precursor solutions.
This item appears in the following Collection(s)
- Academic publications [227904]
- Electronic publications [107414]
- Faculty of Medical Sciences [86236]
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