Preparation of injectable N-acetyl glycol chitosan/poloxamer composite hydrogel for drug release

• Published in: Cai liao gong cheng = Journal of materials engineering Vol. 48; no. 5; pp. 83 - 90
• Main Authors: Li, Jin, Hou, Bing-Na, Han, Chao-Yue, Ni, Kai, Zhao, Zi-Nian, Li, Zheng-Zheng
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01.05.2020; Journal of Materials Engineering
• Subjects: Biomedical materials; Body temperature; Chitosan; Drug delivery systems; drug release carrier; Gelation; Hydrogels; Mechanical properties; Morphology; n-acetyl glycol chitosan; poloxamer; Poloxamers; Pore size; Porosity; Sol-gel processes; sol-gel transition; Sustained release; Transition temperature
• ISSN: 1001-4381; 1001-4381
• DOI: 10.11868/j.issn.1001-4381.2019.001004

Poloxamer is a thermo-sensitive polymer that can form gel at a concentration of 15.0%(mass fraction, the same as below)-30.0%.In order to decrease the gelatinization concentration and improve drug release properties of poloxamer at body temperature, thermo-sensitive N-acetyl glycol chitosan/poloxamer composite hydrogel was prepared by complexing N-acetyl glycol chitosan with poloxamer 407 (GC/P407).The structure, thermo-sensitivity, mechanical properties, morphology and in vitro drug release properties of GC/P407 were characterized by FT-IR, tube inverting method, rheometer, SEM and UV-vis spectroscopy. The GC/P407 solution shows reversible thermo-sensitive sol-gel transition behavior, and the sol-gel transition temperature is well controlled in the range of 25-37℃ by regulating the ratio of GC/P407, which shortens the gelation time and the gelatinization concentration(6%) of poloxamer 407 at body temperature. GC/P407 composite hydrogel, which has a highly porous three-dimensional structure with pore size of