Influence of small concentration addition of tartaric acid on the 220 °C hydrothermal synthesis of hydroxyapatite

Bucur, Alexandra Ioana; Bucur, Raul Alin; Szabadai, Zoltan; Mosoarca, Cristina; Linul, Petrica A.

doi:10.1016/j.matchar.2017.07.047

Cited by 17 publications

(12 citation statements)

References 12 publications

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“…During the reaction, the HA particles grew along the preferred c-axis direction, so the lengths of the HA particles increased with the increase in the hydrothermal reaction time [ 30 ]. In addition, when the mulberry leaf extract was added, the lengths of the HA particles became shorter because the additive hindered the binding of calcium, phosphorus, or hydroxide ions during the reaction and affected the growth of the HA grains [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nano-Hydroxyapatite Obtained from Eggshell via the Hydrothermal Process and the Precipitation Method

Hsu

Wang

et al. 2023

Molecules

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Hydroxyapatite (HA) is a major component of the inorganic minerals in the hard tissues of humans and has been widely used as a biomedical ceramic material in orthopedic and dentistry applications. Because human bone contains several impurities, including carbonates, chlorides, fluorides, magnesium, and strontium, human bone minerals differ from stoichiometric HA. Additionally, natural bone is composed of nano-sized HA, and the nanoscale particles exhibit a high level of biological activity. In this paper, HA is prepared via the hydrothermal process because its reaction conditions are easy to control and it has been shown to be quite feasible for large-scale production. Therefore, the hydrothermal process is an effective and convenient method for the preparation of HA. Furthermore, eggshell is adopted as a source of calcium, and mulberry leaf extract is selectively added to synthesize HA. The eggshell accounts for 11% of the total weight of a whole egg, and it consists of calcium carbonate, calcium phosphate, magnesium carbonate, and organic matter. Eggshell contains a variety of trace elements, such as magnesium and strontium, making the composition of the synthesized HA similar to that of the human skeleton. These trace elements exert considerable benefits for bone growth. Moreover, the use of eggshell as a raw material can permit the recycling of biowaste and a reduction in process costs. The purpose of this study is to prepare HA powder via the hydrothermal method and to explore the effects of hydrothermal conditions on the structure and properties of the synthesized HA. The room-temperature precipitation method is used for the control group. Furthermore, the results of an immersion test in simulated body fluid confirm that the as-prepared HA exhibits good apatite-forming bioactivity, which is an essential requirement for artificial materials to bond to living bones in the living body and promote bone regeneration. In particular, it is confirmed that the HA synthesized with the addition of the mulberry leaf extract exhibits good in vitro biocompatibility. The morphology, crystallite size, and composition of the carbonated nano-HA obtained herein are similar to those of natural bones. The carbonated nano-HA appears to be an excellent material for bioresorbable bone substitutes or drug delivery. Therefore, the nano-HA powder prepared in this study has great potential in biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Nano-Hydroxyapatite Obtained from Eggshell via the Hydrothermal Process and the Precipitation Method

Hsu

Wang

et al. 2023

Molecules

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“…This suggests that in this samples content of hydrotalcite like phase is higher. Worthy of notice is that some authors [15] connect the band ca. 1380 cm -1 with deformation vibrations of C-O in adhered tartaric acid to the crystals of the ceramic phases.…”

Section: Resultsmentioning

confidence: 99%

“…The neutralization of the net surface charge and coordination of the Mg/Al ions prevent magnesium oxide grains fromdissolution and precipitation of the hydroxides and decrease the rate of hydration process in a water solution. However, during the heat treatment at an elevated temperature, reactions in this system are accelerated by the high-water vapor pressure that prevails in castables [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Chelate Compounds on the Hydration Process of MgO–Al2O3 Phase System under Hydrothermal Conditions

et al. 2021

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In refractory castables during heat treatment, there is a dynamic change from a hydraulic bond to a ceramic bond. During heating, the emission of water takes place; this changes the conditions inside the material to something similar to the hydrothermal ones. This influences the processes that occur during the heating of the castables, and in consequence, the properties of the final material. The aim of the work was to evaluate the influence of the chelate compounds like citric and tartaric acids, often used in castables as dispersing agents, on the properties of the MgO–Al2O3 phase system during hydrothermal treatment. The performed tests included an XRD analysis, a thermal analysis (TG–DSC–EGA), infrared spectroscopy (FTIR), and an SEM–EDS analysis. Based on the obtained results, it was found that even small amounts of chelate compounds have a strong impact on the processes under hydrothermal conditions which results in changes in the phase composition of the materials.

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“…58 These changes are caused by a corresponding shift in d-spacing (Figure 2). 59 For example, a slight shift of the (002) diffraction peak to a high θ value is caused by two factors: (i) abundance of carbonate in A-or Bpositions, (ii) abundance of Na/K occupying M I or M II positions. Cation exchange at M I and M II sites by divalent cations in resulting HAs are studied in the past.…”

Section: ■ Resultsmentioning

confidence: 99%

Novel Route to Enhance the Solubility of Apatite, a Potential Nanofertilizer, through Structural Incorporation of Sodium and Potassium Ions

Sakhno

Jaisi

2021

ACS Agric. Sci. Technol.

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We investigated the selective incorporation of sodium and potassium, cations of highly soluble salts, in a hydroxyapatite nanoparticle (HANP) with the end goal to enhance the solubility. The indirect evidence of the incorporation of carbonate and K/Na into a HANP lattice was shown by changes in a-and c-lattice parameters in powder X-ray diffraction (PXRD) reflections. Similarly, the selectivity of carbonate incorporation between A-and B-type HANPs as a function of Na/K loading was revealed by Fourier-transform infrared spectroscopy (FTIR), where the depletion of columnar OH agreed with the propagation of Atype carbonate. K/Na incorporation is also evidenced from the partial phase transition of HANP to tricalcium phosphate (TCP) during calcination. The amount of TCP formed was double in Na-HANPs than in K-HANPs, even though Na and K loading and carbonate content were similar in both. The selectivity between K and Na incorporation most likely originated from their difference in crystal radii. These results provide clear evidence that monovalent Na/K atoms can enter the P6 3 /m lattice and thus increase the number of Schottky defects, which enhances solubility.

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Influence of small concentration addition of tartaric acid on the 220 °C hydrothermal synthesis of hydroxyapatite

Cited by 17 publications

References 12 publications

Synthesis and Characterization of Nano-Hydroxyapatite Obtained from Eggshell via the Hydrothermal Process and the Precipitation Method

Synthesis and Characterization of Nano-Hydroxyapatite Obtained from Eggshell via the Hydrothermal Process and the Precipitation Method

The Effect of Chelate Compounds on the Hydration Process of MgO–Al2O3 Phase System under Hydrothermal Conditions

Novel Route to Enhance the Solubility of Apatite, a Potential Nanofertilizer, through Structural Incorporation of Sodium and Potassium Ions

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