Investigation on mechanical property of the compound scaffold of Sol-Gel bioactive glass/collegan

Objective To investigate the mechanical prosperity and degradation rate of the scaffolds with compounding collagen and the nano sol-gel derived bioactive glass were studied, and provide the theoretical basis for the further application of collagen based scaffolds. Method The scaffold with compounding collagen and the nano sol-gel derived bioactive glass (58S) were prepared using the freeze-drying techniques with the bioactive glass as phase addition. By affecting the aggregation state of the collagen fibers with adjusting the supplementation of bioactive glass to change the microstructures of the compound scaffolds and finally the compound scaffolds with different mechanical properties were prepared. Results(1) As the aggregation state of the collagen fibers changes, the scaffolds with the coarser collagen fibers is prepared with the diameters 400-600 nm approximately. The coarser collagen fibers will play an important role in improving the mechanical property and slowing down the degradation rate of the collagen based scaffolds. (2) The interactions between bioactive glass and collagen are studied by FTIR and Raman technologies. When the quality of content of collagen in the compound scaffolds is lower than 20%, the secondary structure of collagen is damaged severely. Concluslon The composite scaffolds with the mass ratio of collagen to bioactive glass 40:60 has the best performance in mechanical property and degradation, which will be helpful for further applications.