School of Food Science and Engineering, South China University of Technology, Guangzhou, China; Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China.
School of Food Science and Engineering, South China University of Technology, Guangzhou, China.
Int J Biol Macromol. 2019 Dec 1;141:1175-1182. doi: 10.1016/j.ijbiomac.2019.08.240. Epub 2019 Aug 29.
An edible hydroxypropyl starch (HPS) based bilayer film with a waterproof layer of zein was successfully prepared through a two-step solvent casting method. The morphology, mechanical properties, as well as water barrier properties of the bilayer film were systematically studied. Results showed that bilayer film presented smooth surface morphology with an improved visibility, and there was an adhesion interface between two layers. Water resistance and UV barrier property, as well as mechanical property, were significantly improved. In addition, the interactions between starch and zein through hydrogen bonding were analyzed by Fourier-transform infrared spectroscopy (FTIR) and molecular dynamics (MD) simulation. In MD simulation, the relative trajectories were dynamically presented. Conjunction of starch and zein through hydrogen bonding among the hydroxyl and amino (carboxyl) groups was identified, and stronger affinity with starch mainly rooted from asparagine (ASN) and tyrosine (TYR) residues.
通过两步溶剂浇铸法成功制备了具有防水层玉米醇溶蛋白的可食用羟丙基淀粉（HPS）双层膜。系统研究了双层膜的形态、力学性能和水阻隔性能。结果表明，双层膜表面形态光滑，可见光透过率提高，两层之间存在附着界面。其耐水性、UV 阻隔性和力学性能显著提高。此外，还通过傅里叶变换红外光谱（FTIR）和分子动力学（MD）模拟分析了淀粉和玉米醇溶蛋白之间通过氢键的相互作用。在 MD 模拟中，动态呈现了相对轨迹。通过羟基和氨基（羧基）基团之间的氢键将淀粉和玉米醇溶蛋白结合在一起，并确定了与淀粉的更强亲和力主要源于天冬酰胺（ASN）和酪氨酸（TYR）残基。
