This study describes the development of a nano-titanium dioxide (TiO₂)-based composite of starch-co-poly(acrylamide) (St-g-PAM) copolymer. The graft copolymer was characterised by Fourier transform infrared analysis, thermal gravimetric analysis (TGA), field emission scanning electron microscopy and X-ray diffraction. It was confirmed that acrylamide was grafted over starch successfully. Also, the effects of pH, initiator dosage, temperature and time on grafting percentage and efficiency were investigated. The synthesised titanium dioxide nanoparticle successfully enhancing the thermal and biological properties of a native copolymer was confirmed by TGA and biological assay. This titanium dioxide nanocomposite starch-co-poly(acrylamide) (titanium dioxide/St-g-PAM) showed some important properties, such as plant growth regulation, and acted as a superabsorbent polymer with excellent thermal properties and antibacterial activity. The synthesised titanium dioxide nanoparticle is biodegradable and environment-friendly and accomplished the concept of green chemistry.

中文翻译：

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TiO2/淀粉基生物可降解共聚物纳米复合材料作为植物生长调节剂

本研究描述了纳米二氧化钛 (TiO ₂)-基于淀粉-共聚（丙烯酰胺）（St-g-PAM）共聚物的复合材料。通过傅里叶变换红外分析、热重分析 (TGA)、场发射扫描电子显微镜和 X 射线衍射对接枝共聚物进行了表征。证实丙烯酰胺成功接枝在淀粉上。此外，还研究了 pH、引发剂用量、温度和时间对接枝率和接枝效率的影响。合成的二氧化钛纳米颗粒成功地增强了天然共聚物的热和生物特性，这通过 TGA 和生物测定得到证实。这种二氧化钛纳米复合淀粉-共聚（丙烯酰胺）（二氧化钛/St-g-PAM）显示出一些重要的特性，例如植物生长调节、并作为具有优异热性能和抗菌活性的高吸水性聚合物。合成的二氧化钛纳米粒子具有可生物降解性和环境友好性，实现了绿色化学的概念。