Laboratory "Chemistry of Hybrid Nanomaterials and Supramolecular Systems", G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya St., 1, Ivanovo 153045, Russia; Laboratory of Nonlinear Waves Generation, Branch of the Mechanical Engineering Research Institute of the Russian Academy of Sciences-Research Center for Nonlinear Wave Mechanics and Technology, Bardina St., 4, Moscow 119337, Russia.
Laboratory of Nonlinear Waves Generation, Branch of the Mechanical Engineering Research Institute of the Russian Academy of Sciences-Research Center for Nonlinear Wave Mechanics and Technology, Bardina St., 4, Moscow 119337, Russia.
Int J Biol Macromol. 2019 Oct 15;139:431-439. doi: 10.1016/j.ijbiomac.2019.07.213. Epub 2019 Jul 30.
The work focuses on producing and evaluating "green" multifunctional film materials based on a mixed eco-friendly starch/PVA matrix and filled with fibrous TiO particles formed by the ultrasound-assisted biotemplate method. Starch/PVA/TiO film-forming dispersions were prepared by heating and intensively mixing the components at the same time, and then composite films were obtained by the casting method. The influence of the TiO filler content on the morphological and structural characteristics of the composites was studied by the optical microscopy, X-ray diffraction, DSC and FTIR spectroscopy methods. The compatibility of the polymer components was improved by incorporating a small amount of the filler (0.01 and 0.05 wt% of the dry polymer weight). The dependence of tensile strength and water vapor permeability on the filler content was shown to have a maximum at the TiO concentration of 0.05 wt%. The UV- protective ability of the composite films rose as the TiO concentration increased. The presence of TiO in the biodegradable starch/PVA matrix had little effect on the soil burial biodegradation rate of the composite films. Thus, the obtained results show that fibrous TiO particles at optimum concentration of 0.01 and 0.05 wt% can improve starch/PVA films properties and extend their functionality.
这项工作专注于生产和评估基于混合环保淀粉/PVA 基质的“绿色”多功能薄膜材料，并填充由超声辅助生物模板法形成的纤维状 TiO 颗粒。淀粉/PVA/TiO 成膜分散体通过加热和同时强烈混合成分来制备，然后通过浇铸法获得复合膜。通过光学显微镜、X 射线衍射、差示扫描量热法和傅里叶变换红外光谱法研究了 TiO 填料含量对复合材料的形态和结构特征的影响。通过加入少量填料（干聚合物重量的 0.01 和 0.05wt%）来提高聚合物成分的相容性。拉伸强度和水蒸气透过率对填料含量的依赖性在 TiO 浓度为 0.05wt%时达到最大值。复合膜的 UV 防护能力随着 TiO 浓度的增加而提高。在可生物降解的淀粉/PVA 基质中存在 TiO 对复合膜的土壤掩埋生物降解率几乎没有影响。因此，所得结果表明，在最佳浓度为 0.01 和 0.05wt%的情况下，纤维状 TiO 颗粒可以改善淀粉/PVA 薄膜的性能并扩展其功能。
