Papers by Keyword: Foamed

Abstract: In this paper, the flow characteristics of a lightweight formed magnesia composite usingsuper absorbent polymer as base material for biological panels were evaluated. The experimentalparameters were evaluated with respect to the flow of the mortar according to the water binder ratio(W/B), the volume ratio of fine aggregate (Vs/Vm), the amount of foaming agent (FM) and theamount of super absorbent polymer (SAP). Statistical analysis was performed on the flow obtainedthrough the experiment and the influence coefficient on the flow quality was obtained. The flowquality prediction model equation of the magnesia composite is proposed through the obtainedinfluence coefficient. The proposed model equation shows that the experimental and predicted valuesare over 90%.

Abstract: In this paper, the compressive strength quality characteristics of lightweight formedmagnesia composite using super absorbent polymer as basic material for biological panels wereevaluated. The experimental parameters were evaluated with respect to the compressive strength ofthe mortar according to the water binder ratio (W/B), the volume ratio of fine aggregate (Vs/Vm), theamount of foaming agent (FA) and the amount of super absorbent polymer (SAP). Statistical analysiswas performed on the compressive strength obtained through the experiment and the influencecoefficient on the compressive strength quality was obtained. The compressive strength qualityprediction model equation of the magnesia composite is proposed through the obtained influencecoefficient. The proposed model equation shows that the experimental and predicted values are over80%.

Abstract: A porous tissue scaffold depends on its ability to provide functional balance between mechanical strength, pore properties and interconnectivity of pores. High porosity levels, typically greater than 90% and pore sizes above 100µm are required for tissue growth and fixation. Alumina is a stable and very strong bioceramic which, when doped with calcium and phosphate ions, can potentially combine bioactivity with high porosity and high strength. Highly porous alumina foams were synthesized through heat induced chemical breakdown of precursor salt solutions. Pore sizes achieved for foamed alumina with moderate mole fractions are generally larger than 100µm. Foamed alumina with mole fractions on the extreme high and low ends shows lower average pore sizes. Compressive strength of synthesized foams falls in the range of 100kPa to 230kPa, significantly higher than porous biodegradable polymer tissue scaffolds. The significance of this work is that scaffolds can be produced with the unique combination of high porosity, high strength and biocompatibility.