3. Fabrication of surfaces
STEP 1
Polydimethylsiloxane (PDMS), Epoxy
Resin, Nano Zn, ZnO
STEP 2
Lotus leaf Wax, Silica - self assembly in
the presence of ethanol vapours
STEP 1
STEP 2
4. Results
SEM image of Epoxy Resin Sample
Final Sample
Micro patterned Silica
Micro tubules
5. Working
Contact Angle
Superhydrophobic Surfaces
High contact angle
(Greater then 150o)
Dirt particles are carried with
droplets
Superhydrophilic Surfaces
Very less contact angle
(Less the 30o)
Phototcatalysis on TiO2
Schematic Diagram Actual Results
6. Applications
Self cleaning clothes, paints (coatings), spectacles,
windows, tiles, solar panels
Drag reduction
Antifogging coatings
Photo-catalysis
1. For the treatment of sewage water
2. High wetting of the TiO2 surface
3. High conversion of organics to CO2 & H2O
Chemical engineering
1. Fouling of Heat Exchanger
2. Calendria Evaporators, Falling Film Evaporators
3. Instrumentation (LIG thermometer)
4. Condensers
Maple Syrup on NanoTex
7. Conclusion
Lotus Effect is the future of the Self-Cleaning
technology. Rather it can help Chemical Engineers
to improve the performance of the Evaporators,
Condensers & Heat Exchangers
8. References
Lotus Effect: Surfaces with Roughness-Induced Superhydrophobicity, Self-
Cleaning - Prof Bharat Bhushan, Yong Chae Jung
Self-Cleaning materials – Peter Forbes (Scientific American, 2008)
Lotus-Inspired Nanotechnology Applications - B Karthick and Ramesh
Maheshwari
Synthesis of mesoporous ceria/titania thin films for self-cleaning
applications - Houcine Bouzid
Nanostructured Zn and ZnO nanowire thin films for mechanical and self-
cleaning applications - Ummar Pasha Shaik, Debarun Dhar Purkayastha, M
Ghanashyam Krishna, V. Madhurima
Self-cleaning & Super hydrophilic wool by TiO2 /SiO2 nanocomposite
Esfandiar Pakdel, Walid A. Daoud , Xungai Wang
Bio inspired self-cleaning surfaces with super hydrophobicity,
superoleophobicity, and superhydrophilicity Shunsuke Nishimoto, Bharat
Bhushan
www.wikipedia.com
www.sciencedirect.com
www.lotusleafcoatings.com