Transfer Phenomena Laboratory (TPL), Department of Food Science, Engineering and Technology, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran.
Bioprocessing and Biodetection Laboratory, Department of Food Science and Engineering, University of Tehran, Karaj, Iran.
Int J Biol Macromol. 2024 May;266(Pt 1):130932. doi: 10.1016/j.ijbiomac.2024.130932. Epub 2024 Mar 26.
The fabrication possibility of nanocomposite film from sweet cherry tree exudate gum (SCG) was studied. To improve SCG film properties, oxidation with hydrogen peroxide, ultraviolet irradiation (UV-A and UV-C), and TiO nanoparticles (T-NPs) were used. Hydrogen peroxide oxidation at higher amounts decreased the water vapor permeability (WVP) and thickness and increased the mechanical properties and transparency. In comparison with the UV-A, UV irradiation of the C-type increased permeability, and elongation at break (EAB) and thickness, but reduced the tensile strength (TS), solubility, and transparency. The permeability and tensile strength were increased and elongation at break was decreased at a longer time of irradiation. The transparency values of fabricated films ranged from 65.3 to 79.5 % and WVP were in the range of 2.32-4.72 (×10 g/m.s.Pa). The measured TS of the SCG films were between 2.2 and 5 MPa and the EAB of the SCG films was between 35 and 68.7 %. The FTIR spectrum and SEM images revealed that the treatments could affect the bonds and the smoothness of the film surface, respectively. Images provided by AFM showed that the roughness of the films was increased by the addition of T-NPs. The incorporation of T-NPs increased the TS and decreased EAB and WVP. These results indicated that oxidation, UV irradiation and nanomaterials incorporation could be used to improve SCG film properties that are related to food packaging material.
从樱桃树渗出胶（SCG）制备纳米复合膜的可能性进行了研究。为了提高 SCG 膜的性能，采用了过氧化氢氧化、紫外线辐照（UV-A 和 UV-C）和 TiO2 纳米粒子（T-NPs）。较高用量的过氧化氢氧化降低了水蒸气透过率（WVP）和厚度，提高了机械性能和透明度。与 UV-A 相比，C 型紫外线辐照增加了渗透性、断裂伸长率（EAB）和厚度，但降低了拉伸强度（TS）、溶解度和透明度。较长时间的辐照增加了渗透性和拉伸强度，降低了断裂伸长率。所制备的薄膜的透明度值在 65.3%至 79.5%之间，WVP 在 2.32×10-4.72×10-4g/m.s.Pa 范围内。SCG 薄膜的测量 TS 在 2.2 至 5 MPa 之间，SCG 薄膜的 EAB 在 35 至 68.7%之间。FTIR 光谱和 SEM 图像表明，处理可以分别影响键合和膜表面的光滑度。AFM 提供的图像表明，添加 T-NPs 会增加薄膜的粗糙度。T-NPs 的加入提高了 TS，降低了 EAB 和 WVP。这些结果表明，氧化、紫外线辐照和纳米材料的加入可以改善与食品包装材料相关的 SCG 膜性能。
