论文标题
淀粉胶片上形成的淀粉胶片的光学和结构特性
Optical and structural properties of starch films formed on drying droplets of gelatinized starch solutions
论文作者
论文摘要
我们报告了在平坦底物上淀粉溶液的干液液滴上形成的淀粉膜的光学和结构特性。干燥后形成的淀粉膜形状为圆形，并具有对称的对称“ M形”高度沿其直径。发现这些薄膜本质上是半晶，并且在可见光中是透明的。我们的实验结果表明，这些薄膜在其中心是光学单轴的，但双轴远离中心。研究了在具有不同体积和淀粉浓度的干燥液滴后，研究了沿径向方向的双向反射的变化。关于干燥液滴和薄膜的冷冻-SEM研究揭示了这些薄膜双折射的微观结构和可能的起源。
We report the optical and structural properties of starch films formed on drying droplets of starch solutions on a flat substrate. The starch films formed after drying are circular in shape and have an azimuthally symmetric "M-shaped" height profile along their diameter. These films are found to be semi-crystalline in nature and transparent in visible light. Our experimental results show that these films are optically uniaxial at their center but biaxial away from the center. The variation of birefringence along the radial direction is studied for the films formed after drying droplets with different volumes and starch concentrations. The cryo-SEM studies on the drying droplets and the films reveal the micro-structures and the possible origin of birefringence of these films.
