Effects of parameters of sol–gel process on the phase evolution of sol–gel-derived hydroxyapatite

Eshtiagh‐Hosseini, Hossein; Housaindokht, Mohammad Reza; Chahkandi, Mohammad

doi:10.1016/j.matchemphys.2007.06.002

Cited by 107 publications

(51 citation statements)

References 31 publications

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“…The consistency in crystallite size can be attributed to the constant calcination temperature and conditions in which the coalescence of finer particles is expected to be in similar rate. 36,37 Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDX). SEM images of the as-synthesized and calcined samples are shown in Figure 5 (HA-05) and Figure 6 (HA-1).…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of bioceramic nanocomposites based on hydroxyapatite (HA) and carboxymethyl cellulose (CMC)

et al. 2010

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We report the synthesis of biomimetic nanocomposites based on carboxymethyl cellulose (CMC) and hydroxyapatite (HA) nanoparticles via a co-precipitation method. Physico-chemical characterization was performed before and after calcination by Fourier transform infrared (FTIR) spectroscopy, solid state 31 P nuclear magnetic resonance (NMR) spectroscopy, and thermogravimetric analysis (TGA). The formation of nanocomposites was observed by wide angle X-ray diffraction (WAXD), scanning electron microscopy (SEM) with energy dispersive Xray analysis (EDX), and transmission electron microscopy (TEM). The spectral and crystallographic data indicated the formation of hydroxyapatite in the presence of CMC. They were observed as aggregates of HA nanoparticles and CMC, whose sizes were approximately ~ 260 ± 40 nm. The crystallite size of the hydroxyapatite particles decreased (with 2 wt% 18 ± 3 nm) with increasing CMC content. The morphological aspects of the calcined samples revealed the sintering ability of HA nanoparticles. Nanocomposites of hydroxyapatite nanoparticles that mimic the process of nucleation and growth in nature can be prepared using biomacromolecules such as CMC.

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Section: Resultsmentioning

confidence: 99%

Preparation and characterization of bioceramic nanocomposites based on hydroxyapatite (HA) and carboxymethyl cellulose (CMC)

et al. 2010

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“…Many methods have been reported for synthesising HA including solid-state reaction, precipitation methods, sol-gel, hydrothermal, electrophoretic deposition methods among others [8][9][10][11][12]. The product characteristics are highly influenced by the variables of synthesis.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nanocrystalline hydroxyapatite from Ca(OH)2 and H3PO4 assisted by ultrasonic irradiation

Giardina

Fanovich

2010

Ceramics International

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“…Bioceramic can be classified into two group which are bioinert (ceramic that have no influent on surrounding living tissue) and bioactive ceramic (capable of bonding with living tissue as example calcium phosphate (HA) and certain compositions of glasses. Over past few decade, synthetic hydroxyapatite (HA) has been recognize as important bone substitute materials in orthopedics and dentistry due to its biological similarity to the mineral phase of human bones [1] Due to excellent biocompatibility and tissue bio-activity properties, hydroxyapatite (HA) which is inorganic bioceramic also known as calcium phosphate ceramic that being main inorganic composition of natural bone has been extensively investigated for medical application. Because of this reason, many techniques have been developed for synthesis of HA such as mechanochemical synthesis, combustion preparation, wet chemical deposition, electrochemical deposition, sol-gel method, hydrothermal synthesis and many more [2].…”

Section: -2506mentioning

confidence: 99%

Synthesis and Characterization of Hydroxyapatite Nanoparticle

Rafie

Nordin²

2017

MJAS

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In this research, hydroxyapatite (HA) nano-size powder was synthesized using wet chemical precipitation technique under atmospheric pressure where calcium hydroxide (Ca(OH) 2 ) and ortho-phosphoric acid (H 3 PO 4 ) were used as precursors. Distilled water was used as a diluting media for the reaction and sodium hydroxide (NaOH) was used to control the initial pH. The initial pH values, reaction temperature and calcined temperature play an important role in the morphology on HA as well as the phase formation and degree of crystallinity. Nano HA powder has been studied at different initial pH value which is between 9.00 to 11.00, reaction temperature from 80 °C to 100 °C and calcined temperature at 700 °C to 800 °C. The optimum initial pH value was found at pH 10.00, reaction temperature at 100 °C and calcined temperature was at 800 °C. The crystallographic properties were evaluated by X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) and Field Emission Scanning Microscope (FESEM). The Design Expert version 9.0.2 with statistical and graphical analysis of the result, by using analysis of variance (ANOVA) was applied to optimize variable in the process of synthesis of HA. Based on analysis of variance (ANOVA) that has been perform, calcined temperature was to be influential variables on mass of HA with value of probability less than 0.05. Keywords: hydroxyapatite, chemical precipitation, crystallinity, morphology, optimization AbstrakDalam kajian ini, nanozarah hidroksiapatit (HA) dihasilkan melalui kaedah pemendakan di bawah tekanan atmosfera di mana kalsium hidroksida (Ca(OH) 2 ) dan asid orto fosforik (H 3 PO 4 ) merupakan larutan asas bagi penyediaan HA. Air suling digunakan sebagai agen pelarut dalam menyediakan larutan asas bagi proses pemendakan ini. Larutan natrium hidroksida di gunakan bagi mengawal nilai pH. Nilai pH, suhu tindak balas dan suhu relau merupakan faktor penting dalam pencirian dan penghabluran nanozarah HA. Nanozarah HA disediakan pada nilai pH antara 9.00 hingga 11.00, suhu tindak balas 80 °C hingga 100 °C dan suhu relau pada 700 °C hingga 800 °C. Pencirian nanozarah HA di uji menggunakan X-ray Difractometer (XRD), Inframerah Transformasi Fourier (FTIR), dan Mikroskop Pengimbas Pancaran Medan (FESEM). Perisian Design-Expert 9.0.2 digunakan untuk menganalisis data dan pengoptimuman penghasilan mendakan HA. Berdasarkan analisis varian (ANOVA) yang dilakukan, suhu relau merupakan pemboleh ubah yang mempengaruhi berat HA dengan nilai kemungkinan kurang dari 0.05.Kata kunci: hikdroksiapatit, mendakan bahan kimia, penghabluran, pencirian, pengoptimuman IntroductionTissue disease and defect, and bone disease are serious health condition that can affect the life for those who suffer on it. Since last four decades, various revolution has been introduced in order to make improvement of the uses of

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Effects of parameters of sol–gel process on the phase evolution of sol–gel-derived hydroxyapatite

Cited by 107 publications

References 31 publications

Preparation and characterization of bioceramic nanocomposites based on hydroxyapatite (HA) and carboxymethyl cellulose (CMC)

Preparation and characterization of bioceramic nanocomposites based on hydroxyapatite (HA) and carboxymethyl cellulose (CMC)

Synthesis of nanocrystalline hydroxyapatite from Ca(OH)2 and H3PO4 assisted by ultrasonic irradiation

Synthesis and Characterization of Hydroxyapatite Nanoparticle

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