scholarly journals Rapid conversion of highly porous borate glass microspheres into hydroxyapatite

2021 ◽  
Author(s):  
Md Towhidul Islam ◽  
Laura Macri-Pellizzeri ◽  
Virginie Sottile ◽  
Ifty Ahmed
Keyword(s):  
Borate Glass ◽  
Rapid Development ◽  
Glass Microspheres ◽  
Porous Hydroxyapatite ◽  
Interconnected Porosity ◽  
Highly Porous ◽  
Rapid Conversion

This paper reports on the rapid development of porous hydroxyapatite (HA) microspheres with large external pores and fully interconnected porosity.

scholarly journals Design of Highly Porous Hydroxyapatite Scaffolds by Conversion of 3D Printed Gypsum Structures – A Comparison Study

Procedia CIRP ◽  
2016 ◽  
Vol 49 ◽  
pp. 55-60 ◽  
Author(s):  
Alan C.S. Dantas ◽  
Debora H. Scalabrin ◽  
Roberta De Farias ◽  
Amanda A. Barbosa ◽  
Andrea V. Ferraz ◽  
...  
Keyword(s):  
Comparison Study ◽  
Porous Hydroxyapatite ◽  
3D Printed ◽  
Highly Porous

Adsorption of Fluoride Ions from Drinking Water Using Glass Derived Porous Hydroxyapatite Scaffolds

2013 ◽  
Vol 423-426 ◽  
pp. 1413-1417
Author(s):  
Dong Lin Gu ◽  
Wen Liang
Keyword(s):  
Borate Glass ◽  
Energy Dispersive Spectrometer ◽  
X Ray Diffraction ◽  
Polymer Foam ◽  
Fluoride Ions ◽  
Porous Hydroxyapatite ◽  
X Ray ◽  
Adsorption Performance ◽  
Sodium Calcium ◽  
Fluorine Ions

Sodium calcium borate glass derived hydroxyapatite (G-HAP) scaffolds were prepared by dipping with polymer foam. The effects of adsorption time and G-HAP scaffolds dosage on adsorption performance were studied. The results showed that G-HAP scaffolds could remove fluorine ions in solution effectively. The mechanism of G-HAP scaffolds in removing fluorine ions from aqueous solutions was investigated by the X-ray diffraction, Infrared Spectra and Scanning electron microscopy-Energy Dispersive Spectrometer.

Highly Porous Hydroxyapatite Ceramics for Engineering Applicatios

2010 ◽  
Vol 63 ◽  
pp. 408-413 ◽  
Author(s):  
Hrvoje Ivankovic ◽  
Sebastijan Orlic ◽  
Dajana Kranzelic ◽  
Emilija Tkalcec
Keyword(s):  
Average Length ◽  
Average Diameter ◽  
Ftir Analysis ◽  
X Ray Diffraction ◽  
Gas Cell ◽  
Porous Hydroxyapatite ◽  
Hydroxyapatite Ceramics ◽  
Heat Treated ◽  
Hydrothermal Transformation ◽  
Highly Porous

Highly porous hydroxyapatite (Ca10(PO4)6(OH)2, HA) was prepared through hydrothermal (HT) transformation of aragonitic cuttlefish bones (Seppia Officinalis L. Adriatic Sea) in the temperature range from 140°C to 220°C for 20 minutes to 48 hours. Mechanism of hydrothermal transformation of bones was investigated by DTA/TG analyzer coupled online with FTIR spectrometric gas cell equipment (DTA-TG-EGA-FTIR analysis), X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). DTA-TG-EGA-FTIR analysis have shown the release of CO2 at about 400°C, 680°C and 990°C. The first release could be attributed to organics not completely removed from the heat treated bones, and the second release to decomposition of unconverted aragonite, whereas, the third one could be attributed to CO3 2– groups incorporated in the structure of HA. The interconnecting porous morphology of the starting material (aragonite) was maintained during the HT treatment. The formation of dandelion-like HA spheres with diameter from 3 to 8 μm were observed, which further transformed into nanoplates and nanorods with an average diameter of about 200-300 nm and an average length of about 8-10 μm.

scholarly journals Highly Porous Hydroxyapatite/Graphene Oxide/Chitosan Beads as an Efficient Adsorbent for Dyes and Heavy Metal Ions Removal

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6127
Author(s):  
Nguyen Van Hoa ◽  
Nguyen Cong Minh ◽  
Hoang Ngoc Cuong ◽  
Pham Anh Dat ◽  
Pham Viet Nam ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ion ◽  
Copper Ions ◽  
High Porosity ◽  
Step Method ◽  
Sem Images ◽  
Chitosan Beads ◽  
Porous Hydroxyapatite ◽  
Highly Porous

Dye and heavy metal contaminants are mainly aquatic pollutants. Although many materials and methods have been developed to remove these pollutants from water, effective and cheap materials and methods are still challenging. In this study, highly porous hydroxyapatite/graphene oxide/chitosan beads (HGC) were prepared by a facile one-step method and investigated as efficient adsorbents. The prepared beads showed a high porosity and low bulk density. SEM images indicated that the hydroxyapatite (HA) nanoparticles and graphene oxide (GO) nanosheets were well dispersed on the CTS matrix. FT-IR spectra confirmed good incorporation of the three components. The adsorption behavior of the obtained beads to methylene blue (MB) and copper ions was investigated, including the effect of the contact time, pH medium, dye/metal ion initial concentration, and recycle ability. The HGC beads showed rapid adsorption, high capacity, and easy separation and reused due to the porous characteristics of GO sheets and HA nanoparticles as well as the rich negative charges of the chitosan (CTS) matrix. The maximum sorption capacities of the HGC beads were 99.00 and 256.41 mg g−1 for MB and copper ions removal, respectively.

Highly porous hydroxyapatite bioceramics with interconnected pore channels using camphene-based freeze casting

2007 ◽  
Vol 61 (11-12) ◽  
pp. 2270-2273 ◽  
Author(s):  
Eun-Jung Lee ◽  
Young-Hag Koh ◽  
Byung-Ho Yoon ◽  
Hyoun-Ee Kim ◽  
Hae-Won Kim
Keyword(s):  
Freeze Casting ◽  
Porous Hydroxyapatite ◽  
Interconnected Pore ◽  
Highly Porous

Experimental Studies on a New Highly Porous Hydroxyapatite Matrix for Obliterating Open Mastoid Cavities

2008 ◽  
Vol 29 (6) ◽  
pp. 807-811 ◽  
Author(s):  
Christoph Punke ◽  
Thorsten Zehlicke ◽  
Carsten Boltze ◽  
Hans Wilhelm Pau
Keyword(s):  
Experimental Studies ◽  
Porous Hydroxyapatite ◽  
Highly Porous

Properties of Highly Porous Hydroxyapatite Obtained by the Gelcasting of Foams

2000 ◽  
Vol 83 (12) ◽  
pp. 3021-3024 ◽  
Author(s):  
Pilar Sepulveda ◽  
F. S. Ortega ◽  
Murilo D. M. Innocentini ◽  
Victor C. Pandolfelli
Keyword(s):  
Porous Hydroxyapatite ◽  
Highly Porous

Highly porous hydroxyapatite scaffolds with elongated pores using stretched polymeric sponges as novel template

2009 ◽  
Vol 63 (20) ◽  
pp. 1702-1704 ◽  
Author(s):  
In-Hwan Jo ◽  
Kwan-Ha Shin ◽  
Young-Mi Soon ◽  
Young-Hag Koh ◽  
Jong-Hoon Lee ◽  
...  
Keyword(s):  
Porous Hydroxyapatite ◽  
Highly Porous
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