Nanocoating for silica powder and polymer membranes using low temperature plasma in a vacuum to modify hydrophobicity. Capabilities of Ecosil Technologies LLC.

1. Plasma Deposition Evaluations

2. Plasma Deposited Nano-coatings
Method to modify the hydrophobicity
of silica powder and polymer
membrane substrates by plasma
application of a polymeric nanocoating.
Low temperature vacuum plasma
deposition of an extremely thin
polymeric coating on substrates.

3. Plasma Variables
• Exposure time to plasma (T1, T2, T3, T4)
• Vacuum pressure (P1, P2, P3)
• Applied voltage(V1, V2, V3)
• Monomer flow rate (F1, F2)
• Monomer type (M1, M2, M3)

4. Powder Coating Plasma System
Vacuum Vessel Gas Plasma Generator

5. Plasma Coating Vessel for Powder

6. Powder Plasma Vessel

7. Powder Plasma Vessel

8. Plasma Generator Screen

9. Silica Powder Plasma System
Note: Alternate plasma power source can be direct current power

10. Membrane Coating Plasma System
Gas Plasma GeneratorVacuum Vessel

11. Sheet Coating Plasma System

12. Sheet Coating Plasma System

13. Sheet Coating Plasma System

14. Gas Plasma Generator

15. Sheet Coating Plasma System
Note: Alternate configuration applies vertical electrodes and spooled sheet

16. Polymer Sheet
1 No monomer
2 Medium Film
3 Thin Film
4 Low voltage
5 untreated

17. Water Contact Angle
Untreated
#1
#3
# 4

18. Contact angle on treated sheets
70
88
94.2 94.2
97.6
91.7
82.6
0
10
20
30
40
50
60
70
80
90
100
untreated #1 #2 #3 #4 #5 #6
ContactAngle(Deg.)
Water contact angle measurement for low temperature treated polymer film

19. Discussion