Morphology and crystallinity of the nanosized hydroxyapatite synthesized by hydrolysis using cetyltrimethylammonium bromide (CTAB) as a surfactant

Shih, Wei-Jen; Wang, Moo–Chin; Hon, Min–Hsiung

doi:10.1016/j.jcrysgro.2004.11.330

Cited by 52 publications

(18 citation statements)

References 22 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…En la figura de la derecha se presenta una región con mayor amplificación, en la que los aglomerados están formados por partículas pequeñas con un diámetro menor a 1 μ m. En la micrografía de la muestra HA11,5, Figura 5b, se observa la formación de partículas grandes, que forman aglomerados mayores a 50 μm. En la parte derecha de la figura, se presenta una regi ón con mayor amplificación, donde se observan aglomerados pequeños con un diámetro menor a 5 μm constituidos por hojuelas [22,33]. …”

Section: Resultsunclassified

Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas

2010

View full text Add to dashboard Cite

RESUMENLa hidroxiapatita sintética, Ca 10 (PO 4 ) 6 (OH) 2 , es un biomaterial que se emplea para reconstruir tejido óseo dañado o como recubrimiento de prótesis, ya que su composición química y su estructura se asemejan a la fase mineral contenida en el esqueleto; esta similitud favorece la formación de enlaces con el hueso, siendo por consiguiente un material biocompatible. La hidroxiapatita se puede obtener a partir de huesos, pero hoy en día se sintetiza mediante diferentes procedimientos químicos, como las reacciones en estado sólido, el método sol-gel, la reacción por doble descomposición, la neutralización o el método hidrotérmico. El método hidrotérmico es el más empleado por su simplicidad, pero los inconvenientes del proceso son las altas temperaturas (600-1000 ºC) y los largos tiempos (2-14 días) necesarios para obtener los cristales de hidroxiapatita. Por otro lado, una mejora novedosa en la síntesis de sólidos como las arcillas pilareadas, las hidrotalcitas o las zeolitas es la irradiación con microondas que tiene la particularidad de reducir los tiempos y las temperaturas de cristalización.En este trabajo se presenta la síntesis de hidroxiapatita por medio de irradiación con microondas en una autoclave a 80 ºC, por 10 minutos, 1 atm y una potencia de 200 W. Además, se estudió la influencia del pH en la preparación. El tratamiento con microondas redujo considerablemente el tiempo de síntesis en comparación con otros métodos y las propiedades, la textura y la morfología de la hidroxiapatita obtenida resultaron ser significativamente diferentes.Palabras clave: Hidroxiapatita, biomateriales, irradiación con microondas, núcleos, hidroxilos, porosidad, pH, morfología.Hydroxyapatite synthesis using microwave irradiation during the crystallization step ABSTRACT Synthetic hydroxyapatite, Ca 10 (PO 4 ) 6 (OH) 2 , is a biomaterial used to reconstruct damaged bone tissue or to recover protheses. Indeed, the chemical composition and structure is similar to the mineral phase contained in the scheleton. This similarity favors the formation of bonds with the bone, it becomes then a biocompatible material. Hydroxyapatite may be obtained from bones, but, nowadays, it is synthesized through various chemical procedures such as: solid state, sol-gel, double decomposition, neutralization and hydrothermal reactions. The hydrothermal method is the most employed due to its simplicity but it presents the disadvantage of the required high temperatures (600-1000 °C) and very long times (2-14 days) to obtain hydroxyapatite crystals. A recent improvement in the synthesis of solids as pillared clays, hydrotalcites or zeolites has been the microwave irradiation, as it reduces time and crystallization temperature.In this work, hydroxyapatite is synthesized in presence of microwave irradiation in an autoclave at 80 °C for 10 minutes, 1 atm and 200 W power. The influence of pH is studied. The microwave treatment reduced considerably the synthesis time if compared to the other methods. The properties, texture and morphology of the ob...

show abstract

Section: Resultsunclassified

Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas

2010

View full text Add to dashboard Cite

show abstract

“…Subsequent attachment of the CTAB cations with phosphate anions culminated in an appropriate charge and structure complementarity (Fig. 4) [30,31]. At the first step of the preparation of the solution, by mixing the CTAB with phosphate precursor, the CTAB-PO 4 3− complexes formed rod-like micelles [9].…”

Section: Resultsmentioning

confidence: 99%

Rapid formation of hydroxyapatite nanostrips via microwave irradiation

Arami

Mohajerani

Mazloumi

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…However, when this oxide is used as a reinforcing agent for HA, the decomposition of HA to β-TCP occurs strictly. Many methods for synthesizing HA have been reported, such as sol-gel process [8], wet synthesis [9], and the hydrothermal method [1]. The HA prepared from the bovine bone is advantageous, because it is environment-friendly [8].…”

Section: Introductionmentioning

confidence: 99%

Elaboration and Characterization of Bioceramics from Natural Phosphate

2017

View full text Add to dashboard Cite

The aim of this work is the substitution of the bovine bone by the natural phosphate from Djebelel-Onk (Tébessa, East of Algeria). We prepared two composites (bone/Al2O3 and natural phosphate/Al2O3) by reaction sintering. Different experimental techniques, including density, porosity, X-rays diffraction, and SEM techniques, were used to analyze the formation and transformation of phases at different temperatures. From the X-ray diffraction patterns, we put in evidence the formation of several phases. Through these results, we lighted the possibility of preparing bioceramics from natural phosphate (bone and natural phosphate). The presence of the different materials was confirmed by the micrographic observations.

show abstract

Morphology and crystallinity of the nanosized hydroxyapatite synthesized by hydrolysis using cetyltrimethylammonium bromide (CTAB) as a surfactant

Cited by 52 publications

References 22 publications

Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas

Efecto del pH en la síntesis de hidroxiapatita en presencia de microondas

Rapid formation of hydroxyapatite nanostrips via microwave irradiation

Elaboration and Characterization of Bioceramics from Natural Phosphate

Contact Info

Product

Resources

About