Surface modification of hydroxyapatite. Part I. Dodecyl alcohol

Borum-Nicholas, L; Wilson, Otto C.

doi:10.1016/s0142-9612(03)00239-4

Cited by 161 publications

(91 citation statements)

References 29 publications

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“…There are detailed reports on the infrared spectra, including assignment of the major bands for HAP [1][2][3]15], ACP [13,15] and DCPD [18]. Overall, the infrared spectra obtained in the present study were comparable with the literature reports for these compounds.…”

Section: Ftir Analysis Of Mdcp Hapsupporting

confidence: 86%

“…The sample was introduced into the cell until the desired obscuration (scattering intensity) was achieved. The average size obtained from the laser light scattering experiments is the volume to surface area mean, commonly referred to as the Sauter mean or the D [3,2] average size. The laser light scattering technique also reports the obscuration, which is the amount of light scattered from the particles.…”

Section: Particle Sizing By Laser Light Scatteringmentioning

confidence: 99%

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Stability of milk-derived calcium phosphate suspensions

Anema

2009

Dairy Sci. Technol.

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-Milk-derived calcium phosphate (MDCP) can be isolated from whey derived from acid casein or cottage cheese manufacture as a precipitated calcium phosphate material. However, the composition and suspension properties of this MDCP material are poorly understood. This study was aimed at examining the properties of MDCP when in suspension, and the factors affecting the stability of this calcium phosphate suspension. When suspended in water, MDCP aggregated, with the aggregation rate increasing with increasing temperature. Aggregation was more rapid in milk permeate than in water. The aggregation of MDCP increased with increasing ionic strength, and, as this was accompanied by a decrease in the magnitude of the ζ-potential, this could be explained by the effects of the electrolyte concentrations on the electrical double layers of the particles. Soluble calcium markedly increased the rate of aggregation of the MDCP, whereas soluble phosphate slightly retarded the aggregation. Soluble calcium changed the ζ-potential from negative to positive, with the particles becoming progressively more positive at higher soluble calcium levels. In contrast, increasing soluble phosphate levels made the ζ-potential of MDCP particles markedly more negative. These results indicate that the addition of soluble calcium or soluble phosphate had more specific effects, probably binding to the surface of the MDCP particles. The increased rate of aggregation in soluble calcium solutions could not be solely explained by the changes to the ζ-potentials of the particles. Article published by EDP Sciences Résumé -Stabilité de suspensions de phosphate de calcium dérivé de lait. Du phosphate de calcium d'origine laitière (PCL) peut être isolé à partir de lactosérum provenant de la fabrication de caséine acide ou de fromage Cottage sous forme de phosphate de calcium précipité. Cependant, la composition et les propriétés de suspension de ce PCL sont peu connues. Le but de cette étude était d'examiner les propriétés du PCL en suspension et les facteurs affectant la stabilité de cette suspension de phosphate de calcium. En suspension dans l'eau, le PCL s'agrégeait, et ce, d'autant plus que la température augmentait. L'agrégation était plus rapide dans le perméat de lait que dans l'eau. L'agrégation de PCL augmentait quand la force ionique augmentait, et, comme ceci s'accompagnait d'une diminution de magnitude du potentiel zeta, ce phénomène pourrait s'expliquer par les effets des concentrations en électrolyte sur les doubles couches électriques des particules. Le calcium soluble augmentait nettement le taux d'agrégation du PCL alors que le phosphate soluble retardait légèrement l'agrégation. Le calcium soluble faisait passer le potentiel zeta de négatif en positif, les particules devenant progressivement plus positives aux taux de calcium soluble plus élevés. Au contraire, l'augmentation des taux de phosphate soluble rendait le potentiel zeta des particules de PCL nettement plus négatif. Ces résultats indiquent que l'addition de calcium solubl...

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Section: Ftir Analysis Of Mdcp Hapsupporting

confidence: 86%

Section: Particle Sizing By Laser Light Scatteringmentioning

confidence: 99%

Stability of milk-derived calcium phosphate suspensions

Anema

2009

Dairy Sci. Technol.

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“…179 In addition to the aforementioned, the surface of calcium orthophosphates might be modified as well. 144,509,510,656,[1147][1148][1149][1150][1151][1152][1153][1154] An interesting approach for HA surface modification was described by Lee et al 1154 First, in situ synthesis of surface thiol-functionalized HA (HA-SH) was realized by adding 3-mercaptopropionic acid during hydrothermal synthesis of HA (Fig. 10A).…”

mentioning

confidence: 99%

“…1154 Other examples might be found in the literature. 144,509,510,656,[1147][1148][1149][1150][1151][1152][1153] In general, the purpose of surface modifying is not only to guarantee the even distribution of calcium orthophosphate particles at a high loading level in the matrix, but also to prevent or delay the debonding process of calcium orthophosphate particles from the matrix. Obviously, all surface modifiers must satisfy several biomedical requirements, such as no toxicity, good biocompatibility and no changes in the biological or physicochemical properties of the fillers.…”

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confidence: 99%

Biocomposites and hybrid biomaterials based on calcium orthophosphates

Dorozhkin¹

2011

Biomatter

152

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“…Zhitomirsky et al reported firstly that HA powders, which were prepared by a chemical precipitation, were successfully deposited by an EPD method using isopropyl alcohol as a solvent of the suspension on Ti-6Al-4V with anodic films [11]. Many works have been conducted on the sizes and morphology of HA, the conditions of the electric field, the concentration of the suspension, and the kinds of the solvent and dispersant for HA coatings prepared by EPD [12,13]. EPD could successfully fabricate HA coatings with 90 μm in thickness on porous titanium substrate [14].…”

Section: Hydroxyapatitementioning

confidence: 99%

Bioactive Ceramic Coatings

Maeda

Kasuga

2015

Springer Series in Biomaterials Science and Engineering

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Some kinds of metals, such as titanium and its alloys, bond directly to living bone without fibrous tissue. One of the key techniques for enhancing boneforming ability of the metallic biomaterials is to modify their surface using bioactive ceramics. This chapter introduces various coatings on the metals to give high bioactivity, which is to have an effect on bonding to living bone. The first section is concerned with bioactive ceramic coatings using calcium phosphates or calcium silicates. These coatings show high bonding strength and enhance the biocompatibility, which refers to ability of materials to interact with living tissue and cells, in vivo and in vitro. The next section describes bioactive glass and glass-ceramic coatings on the metal surface. These materials have a significant advantage in that their chemical/physical properties can be controlled by the choice of the chemical composition. The third section is concerned with modification of Ti and its alloys for forming bioactive oxide layers.

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Surface modification of hydroxyapatite. Part I. Dodecyl alcohol

Cited by 161 publications

References 29 publications

Stability of milk-derived calcium phosphate suspensions

Stability of milk-derived calcium phosphate suspensions

Biocomposites and hybrid biomaterials based on calcium orthophosphates

Bioactive Ceramic Coatings

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