The effect of ultrasonic irradiation on the crystallinity of nano-hydroxyapatite produced via the wet chemical method

Barbosa, Michelle C.; Messmer, Nigel Roderick; Brazil, Tayra Rodrigues; Marciano, Fernanda Roberta; Lobo, Anderson Oliveira

doi:10.1016/j.msec.2013.02.027

Cited by 49 publications

(23 citation statements)

References 35 publications

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“…The synthesis of calcium phosphates allows different products to be obtained by varying the Ca/P (calcium/phosphate) ratio of the reactants, so the characterization is necessary in order to prove the creation of HAp. Barbosa et al [26] obtained diffraction peaks of nHAp in 2θ values of 25.9°, 31.9°, and 34.0°, also corresponding to HAp (file JCPDS 024-0033). Zhou et al [25] obtained diffraction peaks in 2θ values of 25.9°, 31.9°, 40.1°, 47.1°, and 48.7°, corresponding to the file JCPDS 024-0033, which suggests that the nHAp retains the hexagonal structure.…”

Section: Cell Viabilitymentioning

confidence: 99%

Production and Characterization of Porous Polymeric Membranes of PLA/PCL Blends with the Addition of Hydroxyapatite

et al. 2019

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Polymer membranes have been widely used in guided tissue regeneration (GTR) and guided bone regeneration (GBR). The literature recognizes that poly (lactic acid) (PLA)/poly (ε-caprolactone) (PCL) blends have better physicochemical properties and that a porous polymer surface facilitates cell adhesion and proliferation. In addition, hydroxyapatite (HAp) incorporated into the polymer matrix promotes osteoinduction properties and osteoconduction to the polymer-ceramic biocomposite. Therefore, polymer membranes of PLA/PCL blend with the addition of HAp could be an alternative to be used in GBR. HAp was obtained by precipitation using the mixture of solutions of tetrahydrate calcium nitrate and monobasic ammonium phosphate salts. The porous membranes of the PLA/PCL (80/20) blend with the addition of HAp were obtained by solvent casting with a controlled humidity method, with the dispersion of HAp in chloroform and subsequent solubilization with the components of the blend. The solution was poured into molds for solvent evaporation under a controlled humidity atmosphere. The membranes showed the formation of pores on their surface, together with dispersed HAp particles. The results showed an increase in the surface porosity and improved bioactivity properties with the addition of HAp. Moreover, in biological studies with cell culture, it was possible to observe that the membranes with HAp have no cytotoxic effect on MC3T3 cells. These results indicate a promising use of the new biomaterial for GBR.

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Section: Cell Viabilitymentioning

confidence: 99%

Production and Characterization of Porous Polymeric Membranes of PLA/PCL Blends with the Addition of Hydroxyapatite

et al. 2019

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“…Wet processing of textiles can be accelerated through ultrasonic due to the cavitation that is the growth and explosion of microscopic bubbles [27][28][29]. This sudden explosive collapse of the bubbles generates hot spots that are able to break a chemical bond.…”

Section: Preparation Of Nylon/silver Nanocompositementioning

confidence: 99%

Conductive nylon fabric through in situ synthesis of nano-silver: Preparation and characterization

Montazer

Komeily‐Nia

2015

Materials Science and Engineering: C

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“…One recent report also describes the sonication- [26]. These transformations are possible due to the increasing stability of the successive phases but can be favored by the cavitation phenomenon that enhances exchange reactions occurring at the particle surface, especially dehydration that leads to a local increase in supersaturation [30]. The other key effect of ultrasound irradiation is related to its ability to limit particle aggregation [16].…”

Section: Discussionmentioning

confidence: 99%

Nanoscale conversion of chlorapatite into hydroxyapatite using ultrasound irradiation

Bouyarmane

Gouza

Masse

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Abstract:The ultrasound-assisted conversion of chlorapatite nanoparticles obtained from a natural phosphate rock into hydroxyapatite nanocrystals was achieved within one hour. The process had no significant impact on particle crystallinity but led to a significant decrease of the colloidal size. Similar variations were obtained for hydroxyapatite nanoparticles treated in the same conditions, suggesting that these variations are not due to the compositional modification. Analyses of the solubility properties of the two phases and of the ionic contents of the reaction medium suggest that the undersaturated conditions of the reaction and the cavitation phenomena favor surface exchange and erosion mechanisms over bulk amorphization.

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The effect of ultrasonic irradiation on the crystallinity of nano-hydroxyapatite produced via the wet chemical method

Cited by 49 publications

References 35 publications

Production and Characterization of Porous Polymeric Membranes of PLA/PCL Blends with the Addition of Hydroxyapatite

Production and Characterization of Porous Polymeric Membranes of PLA/PCL Blends with the Addition of Hydroxyapatite

Conductive nylon fabric through in situ synthesis of nano-silver: Preparation and characterization

Nanoscale conversion of chlorapatite into hydroxyapatite using ultrasound irradiation

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