superhydrophobic surface and application
DESCRIPTION
Jian Xu, Materials Summit, China 2009TRANSCRIPT
![Page 1: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/1.jpg)
Jian Xu, Ning ZhaoNational Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences
Superhydrophoic and Superhydrophoic and
suphydrophilic surfacesuphydrophilic surface
-- Its Its architecturearchitecture and applications and applications
![Page 2: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/2.jpg)
Outline
1.Background
2.Our Work
Transparent superhydrophilic and Ultra-hydrophobic
coatings with anti-fogging & anti-reflective properties
3. Application:
Performance of AR coating on solar cell
4. Conclusion
![Page 3: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/3.jpg)
Background
Surface wettabilitySurface wettability
Cell adhesion and growth
Catalyzing
Waterproof
Oil extraction
Lubrication
Self-cleaning
![Page 4: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/4.jpg)
173.0o±2.5
o
Surfaces with a special wettabilitySurfaces with a special wettability
Superhydrophobic surface with lotus effect Superhydrophilic surface with anti-fogging property
Gradient wettability
Response to Electrical Potential
Surface with a reversible wettability responsive to external stimuli
Macromol. Rapid Commun. 2004, 25, 1606 Nano Letters 2006, 6, 2305
Langmuir 2004, 20, 5952 Science 2003, 299, 371
![Page 5: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/5.jpg)
Previous work: Previous work: superhydrophobic polymeric coatingssuperhydrophobic polymeric coatings
PMMA PS
PS-b-PDMSPP-b-PMMA
PC
Macromolecules,Macromolecules, 2005, 2005, 38, 38, 8996. 8996.
Adv. Mater.Adv. Mater., 2004, 16, 302; 16, 1830., 2004, 16, 302; 16, 1830.
Macromol. Rapid Commun., 2005, 26, 1075
ChemPhysChem, 2007, 8,1108; 7, 8247, 824
![Page 6: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/6.jpg)
Experimental route design
After step 1 After step 2
Nanoparticle preparation
With a diameter of 30nm
LBLfilm UV+ O3
1 2
Superhydrophilic film with
antifogging property
The profile image of water droplet on the surface
Previous work: Previous work: superhydrophilic inorganic-organic hybrid coatingssuperhydrophilic inorganic-organic hybrid coatings
![Page 7: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/7.jpg)
The profile image of water droplet on the surface
Characterization of superhydrophilic surface Characterization of superhydrophilic surface
![Page 8: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/8.jpg)
Outline
1.Background
2.Our Work2.Our Work
Transparent superhydrophilic and Ultra-hydrophobic
coatings with anti-fogging & anti-reflective properties
3. Application:
Performance of AR coating on solar cell
4. Conclusion
![Page 9: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/9.jpg)
Surface morphology of the transparent filmSurface morphology of the transparent film
SEM image AFM image
Inorganic and organic hybrids film with nanostructure
![Page 10: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/10.jpg)
Hydrophobic modification with different silanes
146.5±2.3 147.2±1.3 149.0±1.6 153.6±2.6
CTMS ODMCS OTDDMCS TDF-DMCS
![Page 11: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/11.jpg)
Superhydrophobic & transparent coatingSuperhydrophobic & transparent coating
CA : 149.0±1.6º
![Page 12: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/12.jpg)
Superhydrophilic surface Superhydrophilic surface Antifogging property
Glass slide in a humid air after
cooled in icebox for 20 min. Glass slide holding on a
beaker with 80 hot water ℃
coated uncoated
![Page 13: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/13.jpg)
300 400 500 600 700 80080
85
90
95
100
Tra
nsm
itta
nce (
%)
Wavelength (nm)
glass 110 nm 250 nm 370 nm 1100 nm
T % vs. coating thickness
Superhydrophilic and superhydrophobic surfaceSuperhydrophilic and superhydrophobic surface optical property
![Page 14: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/14.jpg)
Particle diameter vs. T %
![Page 15: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/15.jpg)
14.6nm 18.8nm 7.6nm 7.6nm
Particle diameter vs. CA, roughness
CA 140º CA 138º CA 127º CA 123º
![Page 16: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/16.jpg)
Outline
1.Background
2.Our Work
Transparent superhydrophilic and Ultra-hydrophobic
coatings with anti-fogging & anti-reflective properties
3. Applications in solar cell3. Applications in solar cell
Performance of AR coating on solar cell
4. Conclusion
![Page 17: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/17.jpg)
Solar energy > 25% for total energy in 2050 GDP>100000billion ( RMB )
Based on JRC Report 2004,
![Page 18: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/18.jpg)
Where to for solar cell? Where to for solar cell?
BulkBulkThin-filmThin-film
?
The Third GenerationThe Third GenerationThe Second Generation Generation
The First GenerationGeneration
![Page 19: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/19.jpg)
Size ( mm ): 1580*808*50 Power: 170WProduction Ability: 20,000,000M2/y
An approach enhanced energy efficiency ---Anti-reflection(AR) glass for solar cell
![Page 20: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/20.jpg)
300 400 500 600 700 80080
85
90
95
100tr
an
smitt
an
ce(%
)
Wavelength(nm)
A coated on both sides B uncoated glass
Transmittance: 92 ~ 96.5% in visible spectrum region
![Page 21: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/21.jpg)
The effect of antireflection film on the The effect of antireflection film on the power output of solar cellpower output of solar cell
![Page 22: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/22.jpg)
Incidence angle Incidence angle vs.vs. the power output the power output
Power increase Power increase
3.8-8.5%3.8-8.5%
30o
60o
0o
![Page 23: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/23.jpg)
Durability of the AR coatingDurability of the AR coating
Item Adhesion Pensile hardness Anti steel wool
Adhesion after Boiled in 80˚C water for1 hr
Condition 3M tap 1Kg 350g,10 times
3M tap
Results 100/100 3H ok 100/100 , no fogging
![Page 24: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/24.jpg)
A facile method for fabricating transparent
mulitifunctional film based on nanotechnology
Superhydrophobic or superhydrophilic modification
render the coating antifogging/self-cleaning properties
The antireflection film can increase the power output
of solar cell and can product in industrial-scale
Conclusion
Next projectdevelop AR film on flexible substrate and TFT display
international cooperation
![Page 25: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/25.jpg)
Acknowledgement:
Thank the NSFC and CAS Innovation Project for financial
support.
Many thanks for the colleagues: Taiyue Glass, CEEG
(Shanghai) and Chaori Solar Science & Technology Co., Ltd.
Thanks for your attention !Thanks for your attention !
Special issue for ICCASSpecial issue for ICCAS
![Page 26: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/26.jpg)
2120
201 )(log4
nnn
nnnA
0n
1n
2n
A : Amplitude of the Fabry-Pérot finger peaks
,
: refractive index of air
n1 = p·nair + (1-p) ·nframework
: refractive index of coating
: refractive index of substrate
1n
p : porosity of the coatng nframework : refractive index of the framework
p 21.7%.
1.36
Fabry-Pérot vs. refractive index and porosity
![Page 27: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/27.jpg)
Characterizations of wettability: What is contact angle, hysteresis, sliding angle?
Advancing Angle
Receding Angle
Hysteresis : represent for the hardness of slidding off a solid surface for a liquid drop The sliding angle: the difference between the advancing contact angle (θa) and the receding contact angle (θr))
Definition of contact angle
cos
sv sl
lv
John&Sons, New York 1990.
Oxford University Press, Oxford 1984 Langmuir 1998, 14, 5292-5297
Young's equation
![Page 28: Superhydrophobic Surface and Application](https://reader037.vdocuments.site/reader037/viewer/2022102813/54695322af7959637e8b48d7/html5/thumbnails/28.jpg)
02468
10121416
GW
2005 2006 2007 2008 2009 2010
晶硅 非晶硅薄膜 CdTe CIGS Other
95% 92%
70%
87%
78%
67%
Future for different types of solar cellFuture for different types of solar cell