论文部分内容阅读
以性能优异的生物可降解高分子聚己内酯(PCL)与壳聚糖(CS)进行冰醋酸酸溶复合,并采用流延法制备CS∶PCL质量比分别为0∶100、5∶95、10∶90、15∶85、20∶80、100∶0的CS/PCL复合膜,通过XRD、FTIR、1 HNMR、SEM及AFM对复合膜进行了微观形态与结构表征。结果表明:PCL与CS具有良好的相容性,二者分子间形成了较强的氢键,且伴有PCL端位羧基与CS侧链羟基反应生成了新的化学键,使CS/PCL复合膜结构稳定。CS/PCL复合膜的复合比对其结构特征及微观形态影响较大。CS/PCL(10∶90)复合膜的结晶度为29.97%,孔隙率达到85.61%,呈现表面防渗漏、内部多孔且连通的微观结构,初步确定10∶90为二者的最佳复合比。不同复合比的CS/PCL复合膜的微观形态与结构分析为其开发、应用提供了重要的理论依据。
High-performance biodegradable polymer polycaprolactone (PCL) and chitosan (CS) were acetic acid acid-soluble compounding, and prepared by casting method CS: PCL mass ratio of 0: 100, 5:95 , 10:90, 15:85, 20:80, 100:0 CS / PCL composite films. The morphology and structure of the composite films were characterized by XRD, FTIR, 1 HNMR, SEM and AFM. The results showed that PCL has good compatibility with CS, and the strong hydrogen bonds formed between the two PCLs. The carboxyl groups at the PCL react with CS hydroxyl groups to form new chemical bonds, which make CS / PCL composite membrane stable structure. The composite ratio of CS / PCL composite film has a great influence on its structure and microstructure. The crystallinity of CS / PCL (10:90) composite membrane was 29.97%, the porosity reached 85.61%, showing the surface anti-seepage, internal porous and connected microstructure. The optimal composite ratio of the two membranes was 10:90 . The microstructure and structure analysis of CS / PCL composite films with different composite ratios provide important theoretical basis for its development and application.