Banana Trunk Fibers (BF) Immobilized in Chitosan (CS) Natural Composites (BF-i-CS), and Its Application in Controlled-Release of Pesticides

ABSTRACT

Novel green natural composites comprising of BF immobilized in CS (BF-i-CS) were prepared and characterized by means of Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM). It was observed that BF is not grafted to but widely dispersed and immobilized within the CS matrix by physical mean. The effect of pH on the controlled-release behavior of BF-i-CS was investigated using 1- and 2-naphthol as model pesticides. The results revealed that the release amount was found higher in acidic medium followed by neutral and basic medium. On average, the release behavior of 1- and 2-naphthol was found controlled, consistent and prolonged over a period of 36 and 30 h, respectively.

摘要

采用傅立叶变换红外光谱（FT-IR）、热重分析（TGA）和扫描电子显微镜（SEM）等方法，制备了由BF固定在CS（BF-i-CS）中的新型绿色天然复合材料。通过物理方法观察到，高炉未接枝，而是广泛分散并固定在CS基质中. 以1-萘酚和2-萘酚为模型农药，研究了pH值对BF-i-CS缓释性能的影响. 结果表明，在酸性介质中的释放量较高，其次是中性和碱性介质. 平均而言，1-萘酚和2-萘酚的释放行为分别在36和30小时内得到控制、一致和延长.

KEYWORDS:

• Chitosan
• banana trunk fibers
• controlled-release
• naphthol

关键词:

• 关键词
• 壳聚糖
• 香蕉干纤维
• 控制释放
• 萘酚

Acknowledgments

The authors would like to thank Universiti Sains Malaysia (USM), for the research university grant (grant no. 1001/PKIMIA/814124). One of the researchers (Muhammad Rahim) is also thankful to TWAS (The World Academy of Sciences) and USM for providing TWAS-USM Fellowship.