Research On Three-dimensional Oriented Porous Chitosan Scaffolds

(1) Chitosan scaffolds were prepared by in-situ precipitation. Scanning electron microscope (SEM) were used to study features of the scaffolds and the results reveal that the scaffolds are three-dimensional oriented. The porosity was above 88% and compressive strength was as high as 1.80MPa.(2) Chitosan (CS) /hydroxyapatite (HA) composite scaffolds were prepared by in-situ precipitation. HA was synthesised around the chitosan molecularchain. IR and XRD proved the exitance of HA. SEM photos showed that the needle-like HA particles evenly spreaded in the chitosan bulk. The porosity was around 91.2% and compressive strength was as high as 0.267MPa..(3) Chitosan/Ferriferrous oxide (Fe₃O₄) composite scaffolds were prepared by in-situ precipitation and modified by mineralization and aging procedure. IR and XRD proved the exitance of Fe₃O₄ and the obvious effect of chemical bond between the magnetic particles and chitosan moleculars. The digital photographs showed that the scaffold with Fe₃O₄ has more obvious layered structure. SEM proved that column-shape magnetic particals spreaded in the chitosan bulks. The porosity was up to 95% and compressive strength was as high as 0.668MPa.