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 500 μm pore size 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.