Exploration on Designing Experiment Teaching of Polymer Medical Materials——Taking"Three-dimensional Network Hydrogel Scaffold Made by Photocuring 3D Printing"as an Example
Introducing cutting-edge science and technology into undergraduate experiment teaching has become one of the trends of education reform in colleges and universities.As a new manufacturing technology,photocuring 3D printing shows good application value in polymer material field.In terms of biomedical materials,3D printing is used to design and prepare 3D repair materials that are identical or similar to the damaged tissue area of the patient to achieve precision and personalized medicine.Combined with the biomedical characteristics,the school has implemented a designing experiment teaching project themed on 3D printing polymer medical materials,which provided students with a platform of independent learning and practicing.In this study,the photosensitive materials methacrylamide-modified gelatin(GelMA)and polyethylene glycol diacrylate(PEGDA)were light-cured by digital light processing(DLP)3D printing technology to prepare three-dimensional network hydrogel scaffolds.The printed samples had complete structure and interconnected channels,and their pore size was consistent with the 3D model.The effects of space structure and material formula on the properties of hydrogel scaffolds were analyzed.The results showed that the GelMA-PEGDA hydrogel with three-dimensional network and a pore size of 500 μm had good mechanical property,swelling behavior,and stability.This designing experiment involved an integration of multidisciplinary knowledge,which not only brought a novel teaching experience for teachers and students,but also provided a new idea for the training of innovative talents.
3D printingPolymer materialPhotosensitive materialHydrogelDesigning experiment