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在凝化粉溶液滴滴干燥后形成的薄膜上,光学异位性和形形成

Subhadip Ghosh¹, Arun Roy¹

¹Raman Research Institute, C.V. Raman Avenue, Sadashivanagar, Bengaluru 560080, India.

|June 12, 2023

概括

干燥的粉滴形成独特的微观结构,具有固体地和细胞核. 由蒸发引起的压力会在这些双折膜中形成一个中央穴.

科学领域:

材料科学材料科学材料科学
生物物理学的生物物理.
体科学体科学体科学

背景情况:

凝化粉溶液广泛应用于各种行业.
了解体悬浮液的干燥行为对于材料制造至关重要.
干燥过程中的微观结构演变显著影响最终的材料特性.

研究的目的:

为了研究干燥凝化粉滴的微观结构特征.
为了阐明干粉膜中中央的形成机制.
分析所产生的双晶膜的光学特性.

主要方法:

低温扫描电子显微镜 (Cryo-SEM) 用于高分辨率的横截面成像.
极化光学显微镜用于研究双折射和光学异构性.
在平面基板上进行受控的干燥实验.

主要成果:

揭示了独特的三层微观结构:薄的弹性地,中间网,以及粉纳米颗粒的细胞核.
观察到干燥的薄膜是双折射的和向对称的,具有中央的穴.
证明电影在光学上是中心的单轴,对外围的双轴.

结论:

这项研究提供了干燥粉滴滴微结构的第一个详细的冷SEM分析.
蒸发引起的压力被认为是中央坑形成的主要驱动因素.
观察到的光学特性与干燥过程中形成的异性质微观结构相关.

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