Papers by Keyword: Compressive Modulus

Abstract: Tissue engineering process has developed renewable materials used in a variety of applications. This research selected gelatin blended with CMC and fabricated by using salt-leaching technique. This technique does not require solvent, pressure or unnecessary expensive devices. The ratios of gelatin/CMC were 100/0(G1), 90/10(G2), 80/20(G3), 70/30(G4) and 60/40(G5), respectively. Crosslinking technique by using high temperature or dehydrothermal treatment (DHT) for improvement the properties of gelatin sponges brought to use in this research. The scaffolds were characterized the physical properties by observing the morphology using Scanning Electron Microscope (SEM) and measuring pore size of the scaffold from SEM images. The SEM images results revealed that the scaffolds occurred inter-connected porous structures which were found in 80/20 (G3), 70/30 (G4), and 60/40 (G5). The pore size of all scaffolds was in range of 113.46-212.82 μm. The compressive results revealed that the G3 scaffold occurred the highest compressive modulus which was 184 kPa whereas the mixture of 60/40(G5) ratio had lowest compressive modulus which was 23 kPa and the mixture 90/10(G2), 100/0(G1) and 70/30(G4) ratio were 75, 70 and 46 kPa, respectively.

Abstract: Organic materials (cable particularly) aging has an adverse effect on the safety of productionsituations, and it is unscientific to replace organic materials blindly. A live evaluation system of organicmaterials aging was developed in present paper. This system consists of control and detection circuit(composed by ARM chip S3C6410 and force sensor, etc.) and servo drive motor. Compressivemodulus of organic materials was tested by the system with the help of mechanical system, so as toevaluate the cable aging.

Abstract: By contrasting the two finite models, a practical finite element computational model of X-cor sandwich’s compressive modulus was proposed. Through numerical analysis the X-cor sandwich’s stress field and compressive modulus were achieved and the effects of changing Z-pin’s radius, density, angle and volume fraction to the X-cor sandwich’s compressive modulus were analyzed. The numerical analysis results indicate that as the Z-pin’s angle increases the X-cor sandwich’s compressive modulus decreases, as the Z-pin’s radius, density and volume fraction increase the X-cor sandwich’s compressive modulus increases. Through the computation of finite model the influencing trends of X-cor sandwich’s parameters are achieved and the rationality of the proposed finite model is verified.

Abstract: Poly ε-caprolactone(PCL)/hydroxyapatite(HA) composite scaffolds were fabricated by particulate leaching and freeze drying routes with different HA content. Porosity was decreased with HA addition, while mean pore size was maintained at around porogen size regardless of HA content. Compressive modulus was increased with increasing HA content. In this study, the optimum content of HA was around 40% in weight against PCL to obtain the highest compressive modulus with keeping porosity above 85%. HA apparently enhanced proliferation of osteoblast-like MG63 cells in PCL/HA composite scaffolds. Typical adhesion, migration and aggregation procedure of MG63 cells were found on PCL, while spreading morphology only was found on HA even at the early stage of adhesion without migration or aggregation.