1.
Superhydrophobic coatings using
LAMP BLACK
Category: C3 Level: UG

2.
Protective coatings
• Hydrophobic coatings
• Anti-corrossion
• Scratch resistant
• Anti-icing
• Heat resistant

3.
Lamp black coatings
• Carbon micro/nanostructures
• No hazardous chemicals
• Environment friendly
• Low cost/ cost effective
• Easy synthesis

4.
Experimental
• Castor Oil and cotton wick
• Substrates used: 1. Aluminium
2. Copper
• Dimensions of substrate ≈ 2 cm x 5 cm
• Manual deposition
• Deposition time: 5 min

5.
Photograph of coatings

6.
Scanning Electron Microscopy
A1 C1
Porosity: Reason for hydrophobicity
Scanning Electron Microscope Laboratory, Physics Instrumentation Facility Centre (PIFC),
Department Of Physics, Shivaji University Kolhapur-416004, MS (India).

7.
Thickness of coatings
Coating Thickness of coating (µm)
A1 11.7
C1 13.6
A2 8.9
C2 6.0
𝒕 =
𝒎 𝟐 − 𝒎 𝟏
𝝆𝑨

8.
Contact angle measurement
θ = 117° θ = 135°
θ = 140° θ = 142°

9.
Sliding angle
SA = 15°
SA = 9°
A2
C2

10.
Comparison of contact angles
Coating Contact angle Sliding angle
A1 117° -
C1 135° -
A2 140° 15°
C2 142° 9°

11.
Video of excellent hydrophobic nature of
C2 coating

12.
Conclusion
• Lamp black coatings show superhydrophobic
character.
• C2 coating on oil layered copper substrate
showed contact angle of 142° while sliding
angle of 9°.
• These coatings can be applied as anti-corrosion
coatings.

13.
Issues to be worked on
• Adhesion to substrate
• Performance under high velocity water flow
• Impact of abrasion

14.
Thank you

15.
References
• 1
• 2
• 3
• .
• ,
• .

16.
Correlation of roughness and C.A.