The Lubricity of Polyvinyl Alcohol and Nano-silica Hydrogel’s Scaffold Fabricated by 3D Printing

Hydrogel is a macromolecule three-dimensional network made of hydrophilic polymers, which is soft and has good elasticity. Hydrogels have a wide range of potential applications in tissue engineering, drug delivery and biosensors. In this paper can be applied to a biomedical polymer material polyvinyl alcohol as matrix, according to the first forming crosslinking method, using 3D printing to make SiO 2/PVA sol forming, and then freeze-melt cross-linking treatment to prepare a physically cross-linked three-dimensional network hydrogel scaffold. The further study found that hydrogel scaffold has high mechanical strength and fine internal structure, the compressive modulus of the hydrogel scaffold can reach more than 2.4 times that of the bulk polyvinyl alcohol hydrogel, and the compression of the scaffold Modulus decreases with increasing porosity of the stent. The tribological properties of the scaffolds show that the scaffold has high lubricity and good stability when rubbed repeatedly, due to the double network hydrogel scaffold has good biological compatibility and adhesion properties, cell culture, cells found on the inner wall of the stent porosity can better growth.