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Formation of Polysaccharide Membranes by Splitting of Evaporative Air–LC Interface
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2017-12-19 , DOI: 10.1002/admi.201701219 Kosuke Okeyoshi 1 , Gargi Joshi 1 , Maiko K. Okajima 1 , Tatsuo Kaneko 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2017-12-19 , DOI: 10.1002/admi.201701219 Kosuke Okeyoshi 1 , Gargi Joshi 1 , Maiko K. Okajima 1 , Tatsuo Kaneko 1
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Self‐assembly methods for colloidal crystals are widely developed by using the evaporative interface and capillary forces. Recently, a distinct phenomenon is discovered of macrospace partitioning by a polysaccharide membrane formed in a limited space by drying its aqueous liquid crystalline solution. Differing from typical fingering patterns, here, the viscous solution is in a nonequilibrium process between the polymer deposition and hydration during drying. By drying in limited space with a narrow gap, the nonequilibrium state causes accumulation of small depositions at several specific points and the deposited polymer bridging the substrates. Here, the split meniscus should make the area of the evaporative interface larger. To describe the correlation between the interfacial curve and the partitioning, the geometric effects of the evaporation front are discussed experimentally and numerically. By controlling the evaporation front three dimensionally, the necessary conditions for the vertical membrane formation are verified multilaterally. In future, this approach will help deposition control of not only the polysaccharides but also other biopolymers exhibiting microrod assembly.
中文翻译：
通过蒸发空气-LC界面的分裂形成多糖膜
利用蒸发界面和毛细作用力，胶体晶体的自组装方法得到了广泛的发展。最近，发现了一种明显的现象，即通过干燥其液晶水溶液在有限的空间中形成的多糖膜来进行大空间分配。与典型的指状图案不同，此处的粘性溶液在干燥过程中处于聚合物沉积和水合之间的非平衡过程中。通过在具有狭窄间隙的有限空间中进行干燥，非平衡状态会导致少量沉积物在几个特定点处积聚，并使沉积的聚合物桥接基材。在这里，弯月面的分裂应该使蒸发界面的面积更大。为了描述界面曲线与分区之间的相关性，通过实验和数值讨论了蒸发前沿的几何效应。通过三维控制蒸发锋面，可以从多方面验证垂直膜形成的必要条件。将来，这种方法不仅可以帮助控制多糖的沉积，还可以帮助其他表现出微棒组装的生物聚合物的沉积。
更新日期：2017-12-19
中文翻译：
通过蒸发空气-LC界面的分裂形成多糖膜
利用蒸发界面和毛细作用力，胶体晶体的自组装方法得到了广泛的发展。最近，发现了一种明显的现象，即通过干燥其液晶水溶液在有限的空间中形成的多糖膜来进行大空间分配。与典型的指状图案不同，此处的粘性溶液在干燥过程中处于聚合物沉积和水合之间的非平衡过程中。通过在具有狭窄间隙的有限空间中进行干燥，非平衡状态会导致少量沉积物在几个特定点处积聚，并使沉积的聚合物桥接基材。在这里，弯月面的分裂应该使蒸发界面的面积更大。为了描述界面曲线与分区之间的相关性，通过实验和数值讨论了蒸发前沿的几何效应。通过三维控制蒸发锋面，可以从多方面验证垂直膜形成的必要条件。将来，这种方法不仅可以帮助控制多糖的沉积，还可以帮助其他表现出微棒组装的生物聚合物的沉积。
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