Shuai-xia Tan, Xiao-yan Zhang, Ning Zhao, Jian Xu. Simulation of Sessile Water-Droplet Evaporation on Superhydrophobic Polymer Surfaces[J]. Chinese Journal of Chemical Physics , 2007, 20(2): 140-144. doi: 10.1360/cjcp2007.20(2).140.5
Citation: Shuai-xia Tan, Xiao-yan Zhang, Ning Zhao, Jian Xu. Simulation of Sessile Water-Droplet Evaporation on Superhydrophobic Polymer Surfaces[J]. Chinese Journal of Chemical Physics , 2007, 20(2): 140-144. doi: 10.1360/cjcp2007.20(2).140.5

Simulation of Sessile Water-Droplet Evaporation on Superhydrophobic Polymer Surfaces

doi: 10.1360/cjcp2007.20(2).140.5
Funds:  This work was supported by the National Natural Science Foundation of China (No.50373049, No.50521302 and No.50425312), 973 Program (No.2005CCA00800) and the Innovation Project of Chinese Academy of Sciences.
  • Received Date: 2006-07-14
  • Evaporation of sessile water-droplets on superhydrophobic polymer surfaces has been simulated in recent research. Models based on the ellipsoidal cap geometry and spherical cap geometry, which were originally put forward to describe the profile of a droplet during its evaporation process on a solid surface with a contact angle <90±, are developed to reveal the issue with an initial contact angles larger than 150±. To verify the validity of the model, experiments on superhydrophobic polycarbonate, and °uorinated polyurethane and poly (methyl methacrylate) blend surfaces were carried out. It was observed that the change trends of contact angle and height of the droplet against evaporation time on the superhydrophobic surfaces experimentally are consistent with the simulated results by ellipsoidal and spherical cap models. The ellipsoidal cap model shows the better fits due to the shape distortions of droplets.
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Simulation of Sessile Water-Droplet Evaporation on Superhydrophobic Polymer Surfaces

doi: 10.1360/cjcp2007.20(2).140.5
Funds:  This work was supported by the National Natural Science Foundation of China (No.50373049, No.50521302 and No.50425312), 973 Program (No.2005CCA00800) and the Innovation Project of Chinese Academy of Sciences.

Abstract: Evaporation of sessile water-droplets on superhydrophobic polymer surfaces has been simulated in recent research. Models based on the ellipsoidal cap geometry and spherical cap geometry, which were originally put forward to describe the profile of a droplet during its evaporation process on a solid surface with a contact angle <90±, are developed to reveal the issue with an initial contact angles larger than 150±. To verify the validity of the model, experiments on superhydrophobic polycarbonate, and °uorinated polyurethane and poly (methyl methacrylate) blend surfaces were carried out. It was observed that the change trends of contact angle and height of the droplet against evaporation time on the superhydrophobic surfaces experimentally are consistent with the simulated results by ellipsoidal and spherical cap models. The ellipsoidal cap model shows the better fits due to the shape distortions of droplets.

Shuai-xia Tan, Xiao-yan Zhang, Ning Zhao, Jian Xu. Simulation of Sessile Water-Droplet Evaporation on Superhydrophobic Polymer Surfaces[J]. Chinese Journal of Chemical Physics , 2007, 20(2): 140-144. doi: 10.1360/cjcp2007.20(2).140.5
Citation: Shuai-xia Tan, Xiao-yan Zhang, Ning Zhao, Jian Xu. Simulation of Sessile Water-Droplet Evaporation on Superhydrophobic Polymer Surfaces[J]. Chinese Journal of Chemical Physics , 2007, 20(2): 140-144. doi: 10.1360/cjcp2007.20(2).140.5

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