School of Food Science and Engineering, Yangzhou University, Huayang Xilu 196, Yangzhou, Jiangsu, 225127, People's Republic of China.
School of Food Science and Engineering, Yangzhou University, Huayang Xilu 196, Yangzhou, Jiangsu, 225127, People's Republic of China; Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou University, Huayang Xilu 196, Yangzhou, Jiangsu, 225127, People's Republic of China.
Int J Biol Macromol. 2020 Jun 1;152:1002-1009. doi: 10.1016/j.ijbiomac.2019.10.187. Epub 2019 Nov 18.
Hydroxypropyl methylcellulose (HPMC)/sodium citrate (SC)/lipid tea polyphenol (LTP) photophobic films with different pore sizes from micron scale to nanometer scale were prepared by regulating the SC content (1-7%). The microstructures, physical and sustained antioxidant properties of these films were studied by using wide angel X-ray diffraction, small angle X-ray scattering (SAXS), scanning electron microscope, whiteness meter, ultraviolet spectrophotometer, texture analyzer and peroxide value test. Composite films with higher SC content showed larger pore size and whiteness. With the increasing SC content, crystallinity first increased then decreased. The addition of SC decreased the D (surface fractal dimension) value, smoothness of the cross-section structure, tensile strength, elongation and modulus of composite films. HPMC/SC/LTP microporous films possessed control-release property in oil system, reflected by the lowest peroxide value of peanut oil enclosed in film with 3% SC during three weeks, meaning this film showed the best sustained antioxidant property.
羟丙基甲基纤维素（HPMC）/柠檬酸钠（SC）/茶脂多酚（LTP）疏油薄膜具有从微米级到纳米级不同孔径，通过调节 SC 含量（1-7%）制备而成。采用广角 X 射线衍射、小角 X 射线散射（SAXS）、扫描电子显微镜、白度仪、紫外分光光度计、质构分析仪和过氧化值测试等方法研究了这些薄膜的微观结构、物理和持续抗氧化性能。具有较高 SC 含量的复合膜具有更大的孔径和白度。随着 SC 含量的增加，结晶度先增加后降低。添加 SC 降低了复合膜的 D（表面分形维数）值、横截面结构的平滑度、拉伸强度、伸长率和模量。HPMC/SC/LTP 微孔薄膜在油系统中具有控制释放性能，在三周内用 3%SC 的薄膜包裹的花生油的过氧化物值最低，这意味着该薄膜具有最佳的持续抗氧化性能。
