RESUMO
BACKGROUND: Polyvinyl alcohol (PVA) has similar water content as human tissues, good biocompatibility and high mechanical strength, thereby being utilized as tissue-engineered matrix material. However, the modification in cellular affinity benefits the function as tissue regeneration scaffold materials. OBJECTIVE: To prepare chitosan (CS) / PVA composite scaffold and explore the feasibility of serving as a scaffold for tissue engineering. METHODS: Scaffolds of CS/PVA was fabricated by blending PVA-124 with various amounts of CS using film forming, particle forming, and free-drying methods. Water content, light transmittance, and swelling ratio were tested. Scanning electron microscope was used to observe the configuration of the cress section. RESULTS AND CONCLUSION: A total of 7 different proportional scaffolds were obtained with different PVA and CS dosage. The composite film showed light transmittance between 70%-80%, high water content between 121.2%-162.5% and swelling ratio between 60.3%-133.7%.Composita particle and sponge obtained water content between 82.0%-461.2% and 280.8%-1 939.0%. Composite scaffold with the amount ratio of PVA 0.75 g/CS 0.15 g exhibited the best performance. Scanning electron microscope showed that at a mass ratio of PVA 0.75 g/CS 0.15 g, the scaffold prepared by freeze-drying method had regular, tluffy inner structure, with good mechanics and high water content.
RESUMO
BACKGROUND:Polyvinyl alcohol(PVA)has similar water content as human tissues,good biocompatibility and high mechanical strength,thereby being utilized as tissue-engineered matrix material.However,the modification in cellular affinity benefits the function as tissue regeneration scaffold materials.OBJECTIVE:To prepare chitosan(CS)/PVA composite scaffold and explore the feasibility of serving as a scaffold for tissue engineering.METHODS:Scaffolds of CS/PVA was fabricated by blending PVA-124 with various amounts of CS using film forming,particle forming,and free-drying methods.Water content,light transmittance,and swelling ratio were tested.Scanning electron microscope was used to observe the configuration of the cross section.RESULTS AND CONCLUSION:A total of 7 different proportional scaffolds were obtained with different PVA and CS dosage.The composite film showed light transmittance between 70%-80%,high water content between 121.2%-162.5% and swelling ratio between 60.3%-133.7%.Composite particle and sponge obtained water content between 82.0%-461.2% and 280.8%-1 939.0%.Composite scaffold with the amount ratio of PVA 0.75 g/CS 0.15 g exhibited the best performance.Scanning electron microscope showed that at a mass ratio of PVA 0.75 g/CS 0.15 g,the scaffold prepared by freeze-drying method had regular,fluffy inner structure,with good mechanics and high water content.