Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), PO Box 91775-1163, Mashhad, Iran.
Carbohydr Polym. 2014 Jan 30;101:349-58. doi: 10.1016/j.carbpol.2013.09.072. Epub 2013 Sep 29.
Microstructural, physical, mechanical and thermal properties of a novel biodegradable film based on Lepidium perfoliatum seed gum (LPSG) were investigated. LPSG films were successfully prepared by incorporation of four levels of glycerol (40%, 50%, 60% and 70%, w/w). As expected, increasing glycerol concentration from 40 to 70% (w/w), increased water vapor permeability (WVP), elongation at break (EB%), moisture content, moisture adsorption and water solubility of LPSG films; whilst, elastic modulus (EM), contact angle, melting point (Tm), enthalpy of melting (ΔHm) and glass transition point (Tg) decreased significantly. LPSG films became slightly greenish and yellowish in color but still transparent in appearance. The images taken from electron scanning microscopy indicated uniform surface, compact sheets with no holes or fracture. This study demonstrates that LPSG based films with desired properties can be obtained by adjusting glycerol content.
研究了基于马齿苋种子胶（LPSG）的新型可生物降解薄膜的微观结构、物理、机械和热性能。通过加入 4 个水平的甘油（40%、50%、60%和 70%，w/w）成功制备了 LPSG 薄膜。如预期的那样，随着甘油浓度从 40%增加到 70%（w/w），LPSG 薄膜的水蒸气透过率（WVP）、断裂伸长率（EB%）、水分含量、水分吸附和水溶性显著增加；而弹性模量（EM）、接触角、熔点（Tm）、熔融焓（ΔHm）和玻璃化转变点（Tg）则显著降低。LPSG 薄膜的颜色略带绿色和黄色，但外观仍保持透明。电子扫描显微镜拍摄的图像显示表面均匀，薄片紧密，没有孔或断裂。这项研究表明，可以通过调整甘油含量来获得具有所需性能的 LPSG 基薄膜。
