北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
电话(Tel): +86 10 6440536，传真(Fax): +86 10 64228215，http://www.cgc.org.cn
SurfaShield G Nanometer self-cleaning coating test report
30 kWh After UV treatment results report
Directory
1 、 Test purposes
2 、 Test object
3 、 Test content
4 、 Principle and steps of test equipment,
5 、 Test results
北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
电话(Tel): +86 10 6440536，传真(Fax): +86 10 64228215，http://www.cgc.org.cn
1、 Test purposes
Analysis on glass surfaces SurfaShield G Nanometer self-cleaning coating after 30 kWh/m2 Changes after
exposure to ultraviolet light To discuss a dose of UV irradiation effects on the coating.
2、 Test object
The same type of 2 Coated glass photovoltaic modules (serial number 1-1 1-2 ) And 2 Non-coated glass
(serial number 2-1 2-2 ), UV Before in this 4 Glass surfaces (coated glass coated side) evenly spray SurfaShield
G Nanometer self-cleaning coating.
Coated glass photovoltaic modules:-white flowers tempered coated glass, glass thickness mean: about
3.20 mm Film composition for nano-porous silica and coated after tempering roller coating method is used.
Non-coated glass photovoltaic modules:-white flowers tempered glass, glass thickness mean: about 3.20
mm 。
SurfaShield G Nanometer self-cleaning coatings: consists of particles of titanium dioxide ( TiO2 ) And some
chemical key composition. The chemical bond between the substrate surface with titanium dioxide particles
produce a special metal oxide bridges (M-O-M) to make nanoparticles of titanium dioxide at room
temperature by spraying under way permanently bonded to the conditions , " long " in photovoltaic panels of
glass surfaces, And photovoltaic glass surface providing a layer thickness of approximately 150 nm of the
transparent self cleaning protective film.
3、 Test content
4 Glass in order to test the following:
（1） Test 4 Transmittance of glass;
（2） 4 Pieces of glass are placed in UV test Chamber, used to meet the requirements of UV radiation
exposure to glass surfaces (in accordance with IEC 61215 Request) until the wavelength 280 nm 385
nm Range of ultraviolet radiation to reach 30 kWh/m2 Will 4 Pieces of glass taken out;
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1 UV test chamber
（3） Test 4 Transmittance of glass;
（4） Test 4 Hydrophilic glass surface angles;
（5） 4 Organic ink test glass.
4、 Principle and steps of test equipment,
Transmittance measurement
（1） Equipment: Micro Fiber spectrometer.
（2） Principle: by spectrometer testing through the percentage of glass, light and incident light, test the
wavelength range is 400 nm-1000 nm Finally, glass 400 nm-1000 nm Light transmittance in the
wavelength range, on average, represented the transmittance of glass.
2 glass transmittance measurement
（3） Test the step: use of alcohol the glass front and back wipe clean and dust-free cloth, and random
testing of each piece of glass 5 Transmittance is calculated 5 Transmittance of a point, on average, as
the glass transmittance values.
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Water test
（1） Equipment: video contact angle Tester, angle range 0~180o （± 1o ) Surface.
3 video contact angle Tester
（2） Principle: drops stand on a plane, the angle formed is called Shui Jiao, also known as the contact angle.
Hydrophilic angle is smaller, the hydrophilic material, the better. Otherwise, it hydrophilic angle
increases, more hydrophilic material difference.
（3） Test the step: with a lens tissue and a dust-free cloth to wipe clean glass surface, seen in the video
contact angle Tester clean glass surfaces, until the surface of the glass observation up to dirt-free, and
random testing on every piece of glass 10 A hydrophilic Horn, remove 10 A maximum and minimum
values in the data, calculate the remaining 8 The average, as the angle of the glass of water.
（ a ) To wipe the front glass surface dirt (B) after wiping the glass surface is dirt-free
4 wipe the glass surface before and after
北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
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5 water angle test
Organic ink test
（1） Equipment: methylene blue solution, radiometer and temperature measurement instrument
（2） Principle: TiO2 Under UV light, that catalyzes the degradation of methylene blue, SurfaShield G
Nanometer self-cleaning coating contains TiO2 Components, so spray a self-cleaning coated glass to the
Sun's radiation can make the fading of methylene blue solution.
Because TiO2 Band width is approximately 3.2 eV And so the wavelength is smaller than 387.5 nm
Ultraviolet light can promote it with water ( H2O ) And oxygen ( O2 ) Reaction, forming strong oxidizing
hydroxyl radicals -OH And superoxide anion radicals O2- Can methylene blue degradation of organic
matter. Meanwhile, with methylene blue dye faded amino -NH2, facilitates dyes faded, enhance its
degradation. Therefore, under the Sun, owing TiO2 catalyst as well as the promoting effect of amino,
methylene blue solution fades
（3） Test the step:
（a） Take the very small amount of powder with methylene blue dissolved in 250 ml The water, after
fully dissolved powdered got pale blue transparent solution of methylene blue;
6 methylene blue solution
（b） Use a dust-free cloth to wipe clean the glass surface (smooth side), tube each 2ml Methylene
blue solution, had four drops into the glass surface in different positions;
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7 drops of methylene blue solution on the glass surface
（c） Place a glass in the Sun, close of thermocouple temperature Tester 1 Back of glass, used for
detecting the temperature of glass, or glass surface temperature with infrared temperature gun
tests, experiments, temperature control for glass 35 ℃;
8 thermocouple close to 1 piece of glass on the back
（d） Using radiometers to measure exposure to solar radiation on the surface of the glass;
（e） Observe the solution droplet of color in the glass with the increase of solar radiation and
changing circumstances.
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9 radiometer to measure exposure to solar radiation on the surface of the glass
5、 Test results
Transmittance measurement
（1） Test data
Table 1 light transmission test data
After
30 kWh/m2
After spraying spraying the
After UVon the glass 5
average
irradiation on
Numbering
Transmittance transmittance
the glass 5
of glass ( %
Transmittance (
(%）
）
%）
The
The
93.03815616
90.56009309
The
The
92.90965427
90.50811154
93.01
The
SSG on silica
The
The 1-1
93.01206909
glass before
90.23340636
testing
The
The 91.2851034
93.07157993
Coated
The
The
glass
93.00900665
90.71009838
The
The 90.5366176
93.39947005
The
The
93.38041476
90.48611333
The 1-2
93.29
The
The
93.13271996
90.63415638
The
The
30 kWh/m2 The
Average
average
transmittance
transmittance of
changes ( %
UV-irradiated
）
glass ( % ）
90.66
SSG on silica
glass after
testing
2.53
90.70
2.78
北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
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The 2-1
Noncoated
glass
The 2-2
93.28595384
The
93.23762556
The
95.06197637
The
95.07635859
The
95.11381856
The
94.99463696
The
95.10201289
The
94.9141034
The
94.82293081
The
94.76479958
The
94.83184925
The
94.87782937
95.07
SSG on plain
glass before
testing
94.84
90.40547945
The
91.42748758
The
92.61040209
The
92.12829503
The
91.89794929
The
92.99347006
The
93.01442169
The
92.61040209
The
92.12829503
The
91.89794929
The
92.99347006
The
93.01442169
92.53
SSG on plain
glass after
testing
2.67
91.74
3.27
Table 2 light transmittance of glass sprayed nanostructured coatings before data
Before spraying the transmittance
values （ % ）
Coated glass
93.58 Glass with silica – before any
test
Non-coated glass
92.58 Glass with no coating - before
any test
（2） Analysis of results
Watch 1 , Table 2 Data transmittance of glass before spraying and spraying the Nano self-cleaning coating
after the transmittance value can be found, coated glass following the spraying of nano self-cleaning coating,
light transmission rate is almost unchanged, 93 % About non-coated glass following the spraying of nano selfcleaning coating, light transmission rate from about 92 % Increased to 94 %- 95 % , With an average growth
rate of about 2.5 % 。 Results show that after spraying the Nano self-cleaning coating, significantly increased
non-coated glass transmittance, and self-cleaning coated glass in spraying coating, light transmission rate did
not change significantly .
北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
电话(Tel): +86 10 6440536，传真(Fax): +86 10 64228215，http://www.cgc.org.cn
Watch 1 Transmittance test results available, 4 Spray SurfaShield G Nanometer self-cleaning coated glass
in after 30 kWh/m2 After UV-irradiation, light transmittance ratio has a certain decline before exposure to UV
light (above 2%), description of ultraviolet irradiation on the nano-coating has a certain impact .
In addition, compared to spraying of nano-coating glass 30 kWh/m2 Transmittance of UV-irradiated with
glass sprayed nanostructured transmittance data prior to self-cleaning coating, can be found for coated glass,
glass light transmittance rate after exposure to ultraviolet light (about 90 % ) Than the transmittance of glass
before self-cleaning coating spraying (approximately 93 % ) Also low, explained which of causes, is due to
purple outside light not only on plated film glass Shang of since clean coating produced effects, also will
damage plated film glass Shang of film layer, because film layer itself also has increased through of role, so
film layer damage Hou, plated film glass of light rate is will than spray Qian of plated film glass light rate low;
for no plated film glass, in after purple outside light irradiation Hou glass of light rate also has obviously
declined, dropped about 92 % And before sprayed nanostructured coatings with non-coated glass
transmittance (about 92 % ) Are similar, indicating that UV coating has a certain influence, will destroy the
nano-coating for antireflection effect, resulting in decreased transmittance of glass, but at least keep before
spraying the transmittance levels.
Hydrophilic angle test
（1） Test data
Table 3 hydrophilic glass surface after UV irradiation angle
30 kWh/m2 After
UV-irradiation on
30 kWh/m2 Average
Numbering
the glass 10 A
water glass after UV
hydrophilic angle
irradiation angle (°)
(°)
42.9 (silica from
another
manufacturer)
43.4 silica from
another
manufacturer
43.3 silica from
another
manufacturer
Coated
41.8 silica from
The 1-2
44.1
glass
another
manufacturer
41.8 silica from
another
manufacturer
46.8 silica from
another
manufacturer
46 silica from
another
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Noncoated
glass
The 2-2
manufacturer
45.6 silica from
another
manufacturer
45.2 silica from
another
manufacturer
44.4 silica from
another
manufacturer
34.4 SSG
34.5 SSG
35.5 SSG
35.1 SSG
29.7 SSG
32.3 SSG
35 SSG
35.1 SSG
27.3 SSG
31.7 SSG
33.5
（ a ） 1-2 （ b ） 2-2
10 hydrophilic glass surface after UV irradiation angle test chart
Table 4 average water corner of the glass sprayed nanostructured coatings
Before UV testing
Coated glass
Non-coated
glass
（2） Analysis of results
Sprayed nanometer selfcleaning coating average
water glass before angle
(°)
32.0 Silicon before
52.1 No coating
Sprayed nanometer selfcleaning coating average
water glass after angle (°)
22.3 Sprayed SSG
30.8 Sprayed SSG
Hydrophilic
angle
-30.17
-41%
北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
电话(Tel): +86 10 6440536，传真(Fax): +86 10 64228215，http://www.cgc.org.cn
Watch 4 Data than before spraying water on glass angle mean value and after spraying the Nano selfcleaning coating's hydrophilic angle value can be found, glass coated and non-coated glass following the
spraying of nano self-cleaning coating, water angle is significantly lower, with coated glass hydrophilic angle
down about after the spray paint 30 % Without coating glass hydrophilic angle down about after the spray
paint 41 % 。 Results show that after spraying the Nano self-cleaning coating, glass surface hydrophilicity
enhanced obviously, Nano-coated glass surface hydrophilic, non-coated glass hydrophilic increased more
significantly.
Watch 3 , Table 4 The data can be found, spraying SurfaShield G Nanometer self-cleaning coated glass in
after 30 kWh/m2 After UV-irradiation, hydrophilic glass surface ratio is certain to rise before exposure to UV
light, description of ultraviolet irradiation on the nano-coating has a certain influence, leading to weakening of
hydrophilic glass surface. For coated glass, and after a glass of water after UV irradiation angle (about 44.1 °)
than the UV radiation before and after sprayed nanostructured coatings hydrophilic glass corner (about 22.3 °)
increased by about 1 times the hydrophilic declined significantly, Even than spray nano coating Qian glass of
Pro water angle (about 32 °) also high, description spray has Nano since clean coating of plated film glass in
after purple outside light processing Hou hydrophilic will serious by effects, explained which of causes, is due
to purple outside light not only on plated film glass Shang of since clean coating produced effects, also will
damage plated film glass Shang of film layer, because film layer itself also must of hydrophilic can, so film layer
damage Hou, The hydrophilic coated glass is weaker than before spraying the hydrophilic coated glass. For
non-coated glass, and after a glass of water after UV irradiation angle (about 33.5 °) than the UV radiation
before and after sprayed nanostructured coatings hydrophilic glass corner (about 30.8 °) increased by about
8.7%, hydrophilic slightly decreased, But worse than non-coated glass sprayed nanostructured coatings
hydrophilic Horn (about 52.1 °) small, hydrophilic than before spraying the glass well, indicating that UV
coating has a certain influence, leading to weakening of non-coated glass hydrophilic, but can make glass
hydrophilic after UV irradiation than before spraying the hydrophilicity of the glass.
Organic ink test
（1） After UV-irradiation of the coated glass coated test
（a） 2 Blocks UV processing of coated coated glass individually on each drop 4 Drops of methylene blue
solution, glass, numbered from left to right are: 1-2(coating, spray),1-1(coating, spray), as shown in the
following figure, while the 2 pieces of glass and 1 block non-coated glass sprayed nanostructured
coatings, and 1 Block of organic Nano-coatings are spray coated glass ink tests were compared.
Observed 4 methylene blue and pale blue on a piece of glass;
UV Treated with spray coating glass No spray coating glass spray coating glass
(No UV Processing)
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（b） When the radiation levels on the glass plane reached 42 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying coating glass No spray coating glass spray coating glass
(No UV Processing)
（c） When the radiation levels on the glass plane reached 84 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying coating glass No spray coating glass spray coating glass
(No UV Processing)
（d） When the radiation levels on the glass plane reached 126 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the following figure, spraying of nano-coatings can be observed on
the coated glass is completely fading of methylene blue aqueous solution;
UV Treatment after spraying coating glass No spray coating glass spray coating glass
(No UV Processing)
（e） When the radiation levels on the glass plane reached 168 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
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UV Treatment after spraying coating glass No spray coating glass spray coating glass
(No UV Processing)
（f） When the radiation levels on the glass plane reached 252 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying coating glass No spray coating glass spray coating glass
(No UV Processing)
（g） When the radiation levels on the glass plane reached 336 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the following figure, can be observed through UV Treated with spray
coating of nano-coating on the glass is completely fading of methylene blue solution, but at this time
no spraying of nano-coating solution on the coated glass can still see the light blue.
UV Treatment after spraying coating glass No spray coating glass spray coating glass
(No UV Processing)
（2） After UV-irradiation of the coated test non-coated glass
（a） 2 Pieces are coated for UV processing on each drop on non-coated glass 4 Drops of methylene blue
solution, glass, numbered from left to right are: 2-2 (No coating, spray), 2-1 (No coating, spray), as
shown in the following figure, and this 2 Pieces of glass and 1 No spraying of nano-coated and noncoated glass 1 Spraying of nano-coatings organic ink test compares non-coated glass. Observed 4
methylene blue and pale blue on a piece of glass;
北京鉴衡认证中心，地址：北京市北三环东路28号易亨大厦11层
电话(Tel): +86 10 6440536，传真(Fax): +86 10 64228215，http://www.cgc.org.cn
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
（b） When the radiation levels on the glass plane reached 42 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
（c） When the radiation levels on the glass plane reached 84 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
（d） When the radiation levels on the glass plane reached 168Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the following figure, spraying of nano-coatings can be observed on
non-coated glass is completely fading of methylene blue aqueous solution ;
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
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（e） When the radiation levels on the glass plane reached 252 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
（f） When the radiation levels on the glass plane reached 336 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the figure;
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
（g） When the radiation levels on the glass plane reached 462 Wh/m2 Shi, the colour of the methylene blue
solution on the glass as shown in the following figure, can be observed through UV Treated with
sprayed nanostructured coatings without coating on the glass is completely fading of methylene blue
solution, but at this time no spraying of nano-coating solution on non-coated glass can still have a light
blue.
UV Treatment after spraying non-coated glass No spray coating glass-free spray non-coated glass
(No UV Processing)
（3） Analysis of results
Testing phenomena can be observed from the above, coated glass, after spraying the Nano self-cleaning
coating (the glass on the right), when solar radiation reaches 126 Wh/m2 Shi, glass surface of organic solution
that can completely faded, description spray has Nano since clean coating of plated film glass has catalytic
decomposition organic solution of role, although no spray since clean coating of plated film glass (right up
second block glass) Shang of organic solution also has faded, but this just due to organic solution in UV Xia has
must in since decomposition capacity, but decomposition time more long, combines above phenomenon also
can see, dang sun radiation volume reached 336 Wh/m2 Shi, sprayed layer of coating on the glass-free organic
solvents still have light blue, not completely faded. Over 30 kWh/m2 of UV irradiation, nanometer self-cleaning
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coatings are spray coated glass, when solar radiation reach 336 Wh/m2 Shi, the organic solution on the glass
has completely faded, suggesting that after glass of UV irradiation is still has the role of catalytic
decomposition of organic solvents, But you can also see the catalytic effect of the coating on the glass at this
time has decreased about UV light will have an effect on Nano-coatings on glass, will weaken the coating's
ability to decompose organic solvents, but not fully destroyed Nano self-cleaning coating.
For non-coated glass, after spraying the Nano self-cleaning coating (the glass on the right), when solar
radiation reaches 168 Wh/m2 Shi, glass surface of organic solution that can completely faded, description
spray has Nano since clean coating of no plated film glass has catalytic decomposition organic solution of role,
although no spray since clean coating of no plated film glass (right up second block glass) Shang of organic
solution also has faded, but this just due to organic solution in UV Xia has must in since decomposition
capacity, but decomposition time more long, combines above phenomenon also can see, dang sun radiation
volume reached 462 Wh/m2 Shi, no spray coating layer coated glass-free organic solvents still have on light
blue, not completely faded. Over 30 kWh/m2 of UV irradiation, spraying of nano self-cleaning coating noncoated glass, when solar radiation reached 462 Wh/m2 Shi, the organic solution on the glass has completely
faded, suggesting that after glass of UV irradiation is still has the role of catalytic decomposition of organic
solvents, But you can also see the catalytic effect of the coating on the glass at this time has decreased about
UV light will have an effect on Nano-coatings on glass, will weaken the coating's ability to decompose organic
solvents, but not fully destroyed Nano self-cleaning coating.
Addition, compared plated film glass and no plated film glass in spray has Nano since clean coating Hou
catalytic decomposition organic solution of capacity, can see, plated film glass in spray has coating Hou,
catalytic decomposition capacity strong Yu spray has coating of no plated film glass, explained which of
causes, may is due to plated film glass Shang of film layer has must of hydrophilic can, so organic solution
liquid drops in plated film glass Shang will spread out more big of area, at organic solution and too Sun contact
of area more big, which solution must decomposition faster.
Last, can observation to, regardless of is for no plated film glass also is has plated film glass, in spray has
Nano since clean coating Hou, glass that has catalytic decomposition organic solution of capacity, and after
purple outside light of irradiation, glass Shang of nano coating will by must degree of effects, nano coating
decomposition organic of capacity has must of declined, but not completely disappeared, at of glass still has
must of decomposition organic of capacity.