Biocomposites comprising acidified chitosan (CTS) encapsulated in partially cross-linked natural rubber (NR) matrices (CTS-e-NR) were prepared and characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and field emission scanning electron microscopy (FE-SEM). The results of FT-IR, TGA and FE-SEM revealed that CTS was merely encapsulated within partially cross-linked natural rubber, and no chemical interaction was observed between CTS and NR. Soil burial biodegradation studies indicated that CTS-e-NR was degraded beyond any doubt, and weight loss of 48.98% was observed within 8 months. The release behaviour of CTS-e-NR was investigated in distilled water, where the naphthols (pesticide precursors) 1-hydroxynaphthalene (1-N), 2-hydroxynaphthalene (2-N), 1,4-dihydroxynaphthalene (1,4-N) and 2,6-dihydroxynaphthalene (2,6-N) were used as model pesticides. The percentage released in the first 24 h was found to be 7.38, 4.39, 2.96 and 6.95%, while 62.69, 60.64, 22.68 and 40.985% was released at the 35th day, for 1-N, 2-N, 1,4-N and 2,6-N, respectively. The release of naphthols followed non-Fickian diffusion: the combination of both polymer erosion and diffusion release mechanisms. In addition, the release behaviour was found to be consistently controlled and prolonged over a period of 35 days. Therefore, CTS-e-NR is strongly recommended for the controlled-release application of real pesticides.

制备了包含酸化的壳聚糖（CTS）的生物复合材料，该化合物包封在部分交联的天然橡胶（NR）基质（CTS-e-NR）中，并通过傅里叶变换红外光谱（FT-IR），热重分析（TGA）和场发射扫描进行了表征电子显微镜（FE-SEM）。FT-IR，TGA和FE-SEM的结果表明CTS仅被包封在部分交联的天然橡胶中，并且CTS和NR之间没有观察到化学相互作用。土壤埋葬生物降解研究表明，CTS-e-NR的降解毫无疑问，并且在8个月内观察到体重减轻了48.98％。在蒸馏水中研究了CTS-e-NR的释放行为，其中萘酚（农药前体）1-羟基萘（1- N），2-羟基萘（2- N），将1,4-二羟基萘（1,4- N）和2,6-二羟基萘（2,6- N）用作模型农药。发现在第35天，对于1- N，2- N，1,4-释放出的百分比分别为7.38、4.39、2.96和6.95％，而在第35天释放出62.69、60.64、22.68和40.985％。N和2,6- N分别。萘酚的释放遵循非菲克扩散：聚合物侵蚀和扩散释放机制的结合。另外，发现释放行为被持续控制并延长了35天。因此，强烈建议将CTS-e-NR用于实际农药的控释应用。