Exploring Surface Tension and Wettability in Nature

Discover the fascinating world of surface tension and wettability through engaging experiments and observations, from water cohesion on a penny to the microscopic structures on lotus leaves. Delve into the role of cohesion and adhesion, surface wettability factors, and everyday applications of these concepts. Explore nature's incredible adaptations seen in creatures like the Thorny Devil and Darkling Beetle. Learn about surface glossing techniques, contact angles, and sandpaper grit for various materials.

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• Surface Tension
• Wettability
• Nature Adaptations
• Cohesion
• Adhesion

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Uploaded on Apr 07, 2024 | 2 Views

Presentation Transcript

1. Wacky Water Jennifer Tumlin, Tallmadge HS Post-Lab Discussion

2. What causes this? Discuss it with your neighbor. Describe the role that cohesion and adhesion play. Water on a penny.

3. What do these illustrate?

4. Surface Tension

5. What determines surface wettability? Did you figure out the 2 responsible factors? Some hints ..

6. Lotus Leaves

7. Micro-structures on the leaves from 10 to 0.4 micrometers

10. A B C D E

11. Nature Know-How

12. Thorny Devil from Australia

13. Darkling Beetle from Namibia

16. Everyday applications?

17. Glossing Polish Maleic Anhydride Thompson Quik Wax Never Wet WD40 Uncoated Perfluoro Generic Carnauba 130 120 110 Contact Angle 100 90 80 70 60 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 150 120 1500 600 Sandpaper Grit