Synthesis and characterization of La0.6Sr0.4−xCaxCo0.2Fe0.8O3 materials by the gel-casting process

Hydroxyapatite-based materials have been used for dental and biomedical applications. Newly developed synthesis techniques give cause to a broad field in the study of these materials and industry demands products with better properties day by day. The purpose of the present work was to evaluate the mechanical properties of hydroxyapatite-based (HAp-based), organic-inorganic composites. HAp-based, organic-inorganic composites were obtained by modified gel casting process and organic molecules in a gelatin solution. HAp samples of different sizes and shapes were obtained with controlled micro and macro porosity and then were immersed into several gelatin solutions with different concentrations. X-ray powder Diffraction (XRD), Infra Red (IR) Spectroscopy and Scanning Electron Microscopy (SEM) techniques were used to analyze samples before and after gel casting process in order to assure that chemical and physical properties remains the same after this process. IR Spectroscopy and SEM techniques were used to characterize samples after the introduction of organic phase in order to analyze the final morphology of samples. Mechanical characterization was made in compression mode to samples without and with different concentrations of organic phase in order to establish the optimum conditions in which the highest compressive strength and Young’s modulus is reached.

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Synthesis and characterization of three-arm polyamide 6-polyurethane block copolymer by monomer casting process

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2010.01.012 ◽

2010 ◽

Vol 31 (6) ◽

pp. 2776-2783 ◽

Cited By ~ 7

Author(s):

Xin Deng ◽

Aixue Liu ◽

Jin Wang ◽

Jun Yang ◽

Duxin Li

Keyword(s):

Block Copolymer ◽

Casting Process ◽

Polyamide 6 ◽

Synthesis And Characterization

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Mechanical Characterization of Hydroxiapatite Micro/Macro-Porous Ceramics Obtained by Means of Innovative Gel-Casting Process

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.417-418.565 ◽

2009 ◽

Vol 417-418 ◽

pp. 565-568 ◽

Cited By ~ 8

Author(s):

Paolo Marcassoli ◽

Marina Cabrini ◽

Jacopo Tirillò ◽

Cecilia Bartuli ◽

Paola Palmero ◽

...

Keyword(s):

Compressive Strength ◽

Mechanical Characterization ◽

Casting Process ◽

Maximum Size ◽

Porous Ceramics ◽

Critical Stress Intensity Factor ◽

Gel Casting ◽

Tissue Reconstruction ◽

Mechanical Investigation

An innovative gel-casting process was developed in order to obtain macro porous ceramics scaffolds of hydroxyapatite to be used in regenerative medicine for bone tissue reconstruction. Mechanical investigation was carried out on different formulations of dense hydroxyapatite samples in order to evaluate the effect of the gel casting process parameters on the density, the elastic modulus, the tensile and the compressive strength. The fracture critical stress intensity factor (KIC) was also evaluated by means of microhardness measurements. The correlations between KIC and tensile and compressive strength were examined taking into account the average and maximum size of porosity. The mechanical properties of macro and micro-porous HA are in agreement with the model of Gibson and Ashby.

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