Integrated Analysis on Transport Phenomena during Thin Film Formation Using Inkjet method

喷墨法薄膜形成过程中传输现象的综合分析

• 批准号: 22360324
• 负责人: FUKAI Jun
• 金额: $ 12.06万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22360324/
• 关键词: 薄膜形成; 乾燥工程; 移動現象; 自然対流; インクジェット; 乾燥; 流動可視化; self-pinning

A way how to flatten a thin film using inkjet method is discussed experimentally and theoretically. Firstly the fluid dynamics in solution droplets evaporating on a substrate are analyzed. On the present system, the solutal-derived and thermal-derived Marangoni forces affect the fluid dynamics. They develop the flow in the opposite direction on the free surface. The thermal-derived forces increase with increasing the temperature of substrate. However, after evaporation is advanced in time, the solutal-derived forces finally dominates the fluid dynamics.The reason why binary solvent often forms a flat thin film has been thought to be that the fluid flow in the droplet can be controlled by the difference between the surface tensions of the solvents. However, the film configuration is not correlated to the fluid flow expected from the difference between the surface tension of the solvents, because the solutal-derived forces are larger than solvent-derived one.Consequently, the film shape is influenced by self-pinning position, which can be controlled by viscosity , contact angle and evaporation rate. The Marangoni forces are used to control delicate flatness. According to this result, a new method is proposed to form flat thin films.

从实验和理论上探讨了利用喷墨方法对薄膜进行平坦化的方法。首先分析了溶液液滴在基板上蒸发的流体动力学。在本系统中，溶质和热的Marangoni力影响流体动力学。它们在自由表面上形成相反方向的流动。随着衬底温度的升高，热作用力增大。然而，随着蒸发时间的推移，溶质所产生的力最终控制了流体动力学。二元溶剂经常形成平坦薄膜的原因一直被认为是液滴中的流体流动可以通过溶剂表面张力之间的差异来控制。然而，由于溶液的作用力大于溶剂的作用力，膜的形状与溶剂表面张力差所预期的流体流动不相关，因此，膜的形状受自钉扎位置的影响，而自钉扎位置可以通过粘度、接触角和蒸发速率来控制。马兰戈尼力用于控制微妙的平整度。根据这一结果，提出了一种新的方法来形成平坦的薄膜。

项目成果

Formation of Thin Polymer Film from Droplet on Circular Patterned Surfaces : Effect of Surface Tension and Viscosity on Film Configuration

圆形图案表面上的液滴形成聚合物薄膜：表面张力和粘度对薄膜构型的影响

• 发表时间: 2010
• 作者: Babatunde Patience OLUWATOSIN;et al.
• 通讯作者: et al.

樹脂溶液滴の内部流動と薄膜形成に関する研究

树脂溶液液滴内部流动及薄膜形成研究

• 发表时间: 2011
• 作者: 西畑陽一;中曽浩一;深井潤;齋藤亨;藤代光一
• 通讯作者: 藤代光一

Thermal and Solutal Effects on Convection Inside a Polymer Solution Droplet on a Substrate

热和溶液对基材上聚合物溶液液滴内部对流的影响

• 发表时间: 2010
• 期刊: International Journal of Heat and Mass Transfer
• 影响因子: 5.2
• 作者: M. KANEDA;Y. TAKAO;J. FUKAI
• 通讯作者: J. FUKAI

Marangoni and Rayleigh Effects on Fluid Dynamics in Polymer Solution Droplets Evaporating on Flat Surfaces

马兰戈尼和瑞利对聚合物溶液液滴在平面上蒸发的流体动力学的影响

• 发表时间: 2010
• 作者: Narumi NANRI;et al.
• 通讯作者: et al.

Self-Organization of Polymer Films Using Single and Mixed Solvents on Chemically Patterned Surfaces

使用单一和混合溶剂在化学图案化表面上自组织聚合物薄膜

• 发表时间: 2012
• 期刊: Journal of Chemical Engineering of Japan
• 影响因子: 0.8
• 作者: S. YASUMATSU;H. ISHIZUKA;K. NAKASO;P. O. BABATUNDE;J. FUKAI
• 通讯作者: J. FUKAI