Department of Physics, Hasanuddin University, Makassar 90245, Indonesia.
Department of Chemistry, Makassar State University, Makassar 90224, Indonesia.
Int J Biol Macromol. 2024 Jul;273(Pt 1):132803. doi: 10.1016/j.ijbiomac.2024.132803. Epub 2024 Jun 5.
Bionanocomposites offer a promising solution to the plastic waste crisis. Although tapioca starch shows potential as a bioplastic material, it is characterized by low mechanical properties, poor thermal stability, and high water absorption owing to its hydrophilic nature. To increase the flexibility of the material and reduce the transmission rate of oxygen and water vapor, additives such as fructose and titanium dioxide (TiO) can be incorporated into the material. TiO nanoparticles are commonly utilized in agriculture to enhance nutrient release and promote plant growth. In this study, X-ray diffraction analysis revealed that TiO reduced crystal size while increasing the crystallinity of bionanocomposites. Fourier-transform infrared spectroscopy analysis revealed an absorption peak at 3397 cm, indicating hydrogen bonding between TiO and starch-OH groups, and a peak at 773 cm, indicating an increase in the intensity of Ti-O-Ti stretching vibrations with the incorporation of TiO. Water absorption rate results confirmed that TiO addition enhanced bionanocomposite resistance to water vapor and moisture, evidenced by increased tensile strength from 0.11 to 0.49 MPa and Young's modulus from 2.48 to 5.26 MPa, as well as decreased elongation at break from 21.46 % to 2.36 % in bionanocomposites with TiO. Furthermore, with TiO addition, the biodegradation rate of the bionanocomposites decreased, which is beneficial for enhancing plant nutrient content.
生物纳米复合材料为解决塑料废物危机提供了一个有前途的解决方案。虽然木薯淀粉具有作为生物塑料材料的潜力，但由于其亲水性，它的机械性能低、热稳定性差、吸水性高。为了提高材料的柔韧性并降低氧气和水蒸气的传输率，可以将果糖和二氧化钛（TiO）等添加剂掺入材料中。TiO 纳米粒子通常用于农业中，以促进养分释放和促进植物生长。在这项研究中，X 射线衍射分析表明，TiO 减小了晶体尺寸，同时提高了生物纳米复合材料的结晶度。傅里叶变换红外光谱分析显示在 3397 cm 处有一个吸收峰，表明 TiO 和淀粉-OH 基团之间存在氢键，在 773 cm 处有一个峰，表明随着 TiO 的加入，Ti-O-Ti 拉伸振动的强度增加。吸水率结果证实，TiO 的加入增强了生物纳米复合材料对水蒸气和湿气的抵抗力，表现为拉伸强度从 0.11 MPa 增加到 0.49 MPa，杨氏模量从 2.48 MPa 增加到 5.26 MPa，断裂伸长率从 21.46%降低到 2.36%。此外，随着 TiO 的加入，生物纳米复合材料的生物降解率降低，这有利于提高植物养分含量。
