Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China.
Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China.
Food Chem. 2024 Dec 1;460(Pt 2):140601. doi: 10.1016/j.foodchem.2024.140601. Epub 2024 Jul 24.
This work investigated the effects of 3-aminopropyl triethoxy silane (APTES) hydrolysis time on the physicochemical properties of the resulting starch/epoxidized soybean oil (ESO) bioplastics comprehensively. FTIR analysis confirmed that APTES hydrolyzed for 4 h had the best modification effect on starch. The results of XRD and TGA demonstrated the successful silylation of starch by APTES despite hydrolysis time. Silylation treatment reduced the thermal stability of starch slightly, but enhanced the thermal stability of the resultant bioplastics, revealing better interaction between silylated starch and ESO. The interfacial adhesion of starch and ESO in the bioplastics was obviously enhanced when APTES was hydrolyzed for 2-24 h. The bioplastics with APTES hydrolyzed for 2-4 h showed more desirable tensile properties as the silane hydrolysis was complete and self-condensation of hydrolyzed silanes was avoided. The bioplastics containing silylated starch still showed superior opacity and biodegradability.
本工作全面研究了 3-氨丙基三乙氧基硅烷（APTES）水解时间对所得淀粉/环氧大豆油（ESO）生物塑料的物理化学性质的影响。傅里叶变换红外光谱（FTIR）分析证实，APTES 水解 4 h 对淀粉的修饰效果最佳。X 射线衍射（XRD）和热重分析（TGA）的结果表明，尽管水解时间不同，但 APTES 成功地对淀粉进行了硅烷化。硅烷化处理略微降低了淀粉的热稳定性，但提高了生物塑料的热稳定性，表明硅烷化淀粉与 ESO 之间具有更好的相互作用。当 APTES 水解 2-24 h 时，淀粉和 ESO 在生物塑料中的界面附着力明显增强。当硅烷水解完全且避免水解硅烷的自缩合时，APTES 水解 2-4 h 的生物塑料表现出更理想的拉伸性能。含有硅烷化淀粉的生物塑料仍表现出优异的不透明度和可生物降解性。
