Preparation and Characterization of Chitosan-Gelatin/Glutaraldehyde Scaffolds

Chitosan-gelatin (CG) scaffolds were fabricated with glutaraldehyde as a cross-linker by vacuum freeze-drying. Mixtures of different volumes of chitosan and glutaraldehyde were considered. Morphology, porosity, density, and water absorbency of the scaffolds were studied. Both tensile and compressive properties of the scaffolds were tested. In addition, cellular adherence, proliferation, and morphology on the scaffolds were tested to evaluate the compatibility. It was found that porosity, density, water absorbency, and mechanical properties of CG scaffolds changed with the variation of chitosan or GA content. The adequate adherence, proliferation, and morphology of HaCaT type cells on the scaffolds showed that these scaffolds can be used as carriers for culturing HaCaT. The CG scaffolds, particularly those with chitosan-gelatin volume ratios of 1:1 and adding 6% or 8% volume of 0.25 wt% GA solution, were more suitable than the others through comparing the above properties and could be promising candidates for engineering skin tissue.