载甲钴胺香蕉纤维素微晶/PLGA介孔材料的制备及性能研究

Preparation and Properties of banana microcrystalline cellulose/ PLGA mesoporous materials loading mecobalamin

摘要:

从香蕉树皮中提取香蕉纤维素微晶，将甲钴胺、香蕉纤维素微晶和乳酸-羟基乙酸共聚物(PLGA)制备成载甲钴胺香蕉纤维素微晶/PLGA介孔材料。运用SEM、比表面积及孔径分析仪（BET）、热重-质谱联用仪(TG-MS)和FTIR对产物进行了表征；采用紫外分光光度计对载甲钴胺介孔材料进行了载药率、包封率、体外释放度测定。红外谱图分析表明，所制备的香蕉纤维素微晶的主要成分为纤维素；BET法测定结果表明，载甲钴胺香蕉纤维素微晶/PLGA介孔材料的平均孔直径[4V(孔体积)/A(表面积)]为17.89nm；TG-MS结果表明，载甲钴胺香蕉纤维素微晶/PLGA介孔材料分解温度约为300℃；体外释放实验表明，该材料对甲钴胺有较好的控释作用，药物释放遵循零级释放动力学方程。

Abstract:

The banana microcrystalline cellulose was prepared by the banana fiber, and the esoporous materials were prepared by the mecobalamin, banana microcrystalline cellulose and PLGA. The esoporous materi-als were characterized by SEM, specific surface area and pore size analysis (BET), Thermogravimetric mass spectrometry (TG-MS) and FT-IR. The drug load content, encapsulation efficiency, and in vitro re-lease rate of mesoporous materials loading mecobalamin were studied by the UV spectrophotometry. FT-IR spectrum analysis showed that the main component of microcrystalline cellulose was cellulose. The BET results showed that the average pore diameter [4V(pore volume)/A(surface area)] of banana micro-crystalline cellulose/PLGA mesoporous materials loading mecobalamin was 17.89nm. TG-MS results showed that the decomposition temperature of the materials were about 300℃. The results indicated that the materials had great control release ability, the drug release following zero-order release kinetics.