Résumé
Carbon nanotubes possess excellent mechanical and electrical properties and demonstrate broad application prospects in medical fields. Carbon nanotubes are composed of inorganic materials, natural biodegradable polymer or synthetic biodegradable polymer. The composite bone tissue engineering scaffolds are constructed by particle-hole method, lyophilization, microsphere aggregation method, electrostatic spinning or three-dimensional printing. Composite scaffolds overcome the shortcomings of single material and have good biocompatibility, osteoconduction and osteoinduction. With the study of surface chemistry, toxicology, and biocompatibility, a degradable "human-friendly" carbon nanotubes composite bone tissue scaffold will be available; and under the drive of new fabrication techniques, the clinical application of carbon nanotubes composite bone tissue engineering scaffolds will be better developed.
Sujets)
Humains , Matériaux biocompatibles , Chimie , Développement osseux , Microsphères , Nanotubes de carbone , Chimie , Polymères , Chimie , Impression tridimensionnelle , Ingénierie tissulaire , Structures d'échafaudage tissulaires , ChimieRésumé
@#A reliable crystallization process was developed for the preparation of stable agomelatine form I. This antisolvent crystallization was explored in ethanol-n-heptane by adding PVP and ethanol-water system by adding HPMC, respectively. Factors such as solvent, polymer, concentration of polymer, and solvent ratio were subjected to detailed examination. Accelerated and long-term stability observations indicates that the presence of polymeric additives in the crystallization process enhances the stability of agomelatine form I.