U.S. patent application number 14/582588 was filed with the patent office on 2016-06-09 for anti-fogging, heat-insulating coating composition, method for preparing the same, and film formed from the same.
This patent application is currently assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE. The applicant listed for this patent is Industrial Technology Research Institute. Invention is credited to Pao-Tang Chung, Sung-Jeng Jong, Chyi-Ming Leu, Yu-Yang Su, Chun-Hsiang Wen.
Application Number | 20160160052 14/582588 |
Document ID | / |
Family ID | 56083021 |
Filed Date | 2016-06-09 |
United States Patent
Application |
20160160052 |
Kind Code |
A1 |
Su; Yu-Yang ; et
al. |
June 9, 2016 |
ANTI-FOGGING, HEAT-INSULATING COATING COMPOSITION, METHOD FOR
PREPARING THE SAME, AND FILM FORMED FROM THE SAME
Abstract
Provided is a coating composition having anti-fogging and
heat-insulating functions, which includes a mesoporous material, an
organic polysiloxane, and co-doped tungsten oxide as shown in
formula (I), M.sub.xWO.sub.3-yA.sub.y wherein M is an alkali metal
element, W is tungsten, O is oxygen, A is halogen, 0<x.ltoreq.1,
and 0<y.ltoreq.0.5. Further provided are a method for preparing
a coating composition having anti-fogging and heat-insulating
functions and a film formed from the coating composition.
Inventors: |
Su; Yu-Yang; (Chutung,
TW) ; Chung; Pao-Tang; (Chutung, TW) ; Wen;
Chun-Hsiang; (Chutung, TW) ; Leu; Chyi-Ming;
(Chutung, TW) ; Jong; Sung-Jeng; (Chutung,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Industrial Technology Research Institute |
Chutung |
|
TW |
|
|
Assignee: |
INDUSTRIAL TECHNOLOGY RESEARCH
INSTITUTE
Chutung
TW
|
Family ID: |
56083021 |
Appl. No.: |
14/582588 |
Filed: |
December 24, 2014 |
Current U.S.
Class: |
252/62 |
Current CPC
Class: |
C09D 5/00 20130101; C08K
9/02 20130101; C09D 7/68 20180101; C08K 2003/023 20130101; C09D
183/04 20130101; C09D 7/61 20180101; C09D 7/62 20180101; C09D 7/67
20180101 |
International
Class: |
C09D 5/00 20060101
C09D005/00; C09D 7/12 20060101 C09D007/12; C09D 183/04 20060101
C09D183/04 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 4, 2014 |
TW |
103142118 |
Claims
1. A coating composition having anti-fogging and heat-insulating
functions, comprising: a mesoporous material; a co-doped tungsten
oxide as shown in formula (I) M.sub.xWO.sub.3-yA.sub.y wherein M is
an alkali metal element, W is tungsten, O is oxygen, A is halogen,
0<x.ltoreq.1, and 0<y.ltoreq.0.5; and an organic
polysiloxane.
2. The coating composition of claim 1, wherein the mesoporous
material comprises a precursor, a surfactant, and a mesoporous
silicon particle.
3. The coating composition of claim 2, wherein the mesoporous
silicon particle has a specific surface area greater than 800
cm.sup.2/g.
4. The coating composition of claim 2, wherein the co-doped
tungsten oxide is powder, and a ratio of a particle diameter of the
mesoporous silicon particle to a particle diameter of the co-doped
tungsten oxide is from 20:1 to 1:1.
5. The coating composition of claim 1, wherein the organic
polysiloxane has at least one functional group selected from the
group consisting of a vinyl group, an acrylic acid group, and an
epoxy group.
6. The coating composition of claim 1, wherein the mesoporous
material, the co-doped tungsten oxide and the organic polysiloxane
are in a weight ratio ranging from 42.5:57:0.5 to 8.5:76.5:15.
7. A film having anti-fogging and heat-insulating functions,
comprising: a matrix that is a continuous layer formed from organic
polysiloxane; a plurality of mesoporous silicon particles dispersed
in the matrix; and a co-doped tungsten oxide, as shown in formula
(I), embedded in the matrix and located between any two of the
mesoporous silicon particles, M.sub.xWO.sub.3-yA.sub.y wherein M is
an alkali metal element, W is tungsten, O is oxygen, A is halogen,
0<x.ltoreq.1, and 0<y.ltoreq.0.5.
8. The film of claim 7, wherein each of the mesoporous silicon
particles has a particle diameter ranging from 50 to 1000 nm.
9. The film of claim 7, wherein the co-doped tungsten oxide is
powder, and the powder has a particle diameter ranging from 50 to
100 nm.
10. The film of claim 7, wherein a ratio of a particle diameter of
each of the mesoporous silicon particles to a particle diameter of
the co-doped tungsten oxide is from 20:1 to 1:1.
11. The film of claim 7, wherein apexes of a portion of the
mesoporous silicon particles protrude from a surface of the
matrix.
12. The film of claim 7, which has a water contact angle less than
10.degree..
13. A method for preparing a coating composition having
anti-fogging and heat-insulating functions, comprising: preparing a
mesoporous material, an organic polysiloxane, and a co-doped
tungsten oxide as shown in formula (I), M.sub.xWO.sub.3-yA.sub.y
wherein M is an alkali metal element, W is tungsten, O is oxygen, A
is halogen, 0<x.ltoreq.1, and 0<y.ltoreq.0.5; and mixing the
mesoporous material, the organic polysiloxane, and the co-doped
tungsten oxide as shown in formula (I).
14. The method of claim 13, wherein the mesoporous material
comprises a precursor, a surfactant, and a mesoporous silicon
particle.
15. The method of claim 14, wherein the mesoporous silicon particle
has a specific surface area greater than 800 cm.sup.2/g.
16. The method of claim 14, wherein a ratio of a particle diameter
of the mesoporous silicon particle to a particle diameter of the
co-doped tungsten oxide is from 20:1 to 1:1.
17. The method of claim 13, wherein the organic polysiloxane has at
least one functional group selected from the group consisting of a
vinyl group, an acrylic acid group and an epoxy group.
18. The method of claim 13, wherein the mesoporous material, the
co-doped tungsten oxide and the organic polysiloxane are in a
weight ratio ranging from 42.5:57:0.5 to 8.5:76.5:15.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims foreign priority under 35 U.S.C.
.sctn.119(a) to Patent Application No. 103142118, filed on Dec. 4,
2014, in the Intellectual Property Office of Ministry of Economic
Affairs, Republic of China (Taiwan, R.O.C.), the entire content of
which Patent Application is incorporated herein by reference.
TECHNICAL FIELD
[0002] The present disclosure relates to coating compositions,
films formed from the same, and methods for preparing the same,
and, more particularly, to a coating composition having
anti-fogging and heat-insulating functions, a film formed from the
same, and a method for preparing the same.
BACKGROUND OF THE INVENTION
[0003] Most of the current heat-insulating films and
heat-insulating glass for automobiles do not have an anti-fogging
function. As a result, during a cold winter or a rainy season, the
water vapors in the hot air inside an automobile forms fog droplets
on the surface of the relatively colder glass. As such, the field
of vision of a driver is affected, and a traffic accident might
even occur. Electroautomobiles do not have the hot air from motors
for defogging. In the case of fogging on the glass of an
electroautomobile, air-conditioning is switched on for defogging.
The extra electrical energy consumed by the air-conditioning would
decrease the mileage. Moreover, the effect of the daily temperature
difference causes the saturated water vapor inside an agricultural
polyolefin shed film aggregate on the inner surface of the shed
film to form water droplets, referred to as the "fogging
phenomenon." The fogging phenomenon affects daylight irradiation,
and the high humidity inside in the shed is likely to induce pest
damages to crops.
[0004] Because of the chemical properties of heat-insulating and
anti-fogging materials, such as hydrophilicity and hydrophobicity,
it is difficult to evenly mix the two materials in a coating or a
film-forming material. As a result, most of the heat-insulating
films or heat-insulating glass does not have the anti-fogging
function. In order to add the anti-fogging function to a
heat-insulating film, multiple steps are used in the modern
technology for preparation. For example, coating a fogproof
material on a heat-insulating film or attaching an anti-fogging
film. However, the temperature and time for curing a fogproof
coating or the process for forming a multi-layered film structure
not only increases the production cost, but also limits the product
use due to lowered light transmittance.
[0005] Therefore, in order to resolve the above issues, one of the
major objectives for developing the present disclosure is to
develop a composite coating and a film-forming material having
anti-fogging and heat-insulating functions, while maintaining high
light transmittance.
SUMMARY OF THE INVENTION
[0006] Provided is a coating composition having anti-fogging and
heat-insulating functions, which includes:
[0007] a mesoporous material;
[0008] co-doped tungsten oxide as shown in formula (I)
M.sub.xWO.sub.3-yA.sub.y
[0009] wherein M is an alkali metal element, W is tungsten, O is
oxygen, A is halogen, 0<x.ltoreq.1, and 0<y.ltoreq.0.5;
and
[0010] organic polysiloxane.
[0011] Provided is a film having anti-fogging and heat-insulating
functions, which includes: a matrix that is a continuous layer
formed by organic polysiloxane; a plurality of mesoporous silicon
particles dispersed in the matrix; and co-doped tungsten oxide, as
shown in formula (I), embedded in the matrix and located between
any two of the mesoporous silicon particles.
[0012] Provided is a method for preparing a coating composition
having anti-fogging and heat-insulating functions, which includes
the steps of: preparing a mesoporous material, co-doped tungsten
oxide as shown in formula (I), and organic polysiloxane; and mixing
the mesoporous material, the co-doped tungsten oxide as shown in
formula (I), and the polysiloxane.
BRIEF DESCRIPTIONS OF THE DRAWING
[0013] FIG. 1 is a sectional view of a film having anti-fogging and
heat-insulating functions according to the present disclosure.
DETAILED DESCRIPTION OF THE INVENTION
[0014] In order to make the above and other objectives, features
and advantages of the present disclosure more readily conceivable,
the following preferred embodiments are provided, along with the
appended figure, for more detailed descriptions. From the
disclosure of the present specification, a person skilled in the
art can conceive the other advantages and effects of the present
disclosure. The present disclosure can also be implemented or
applied by other different embodiments. Based on different aspects
and applications, each of the details of the present disclosure can
also be modified and altered in various ways, without departing
from the spirit of the present disclosure. It should be understood
that the following specific elements and arrangements are merely
used for describing the present disclosure. Of course, these
contents are merely used for exemplification, and not intended to
limit the present disclosure.
[0015] Unless otherwise specified herein, the following terms used
in the specification and the appended claims having the following
meanings. Specifically, the singular forms "a," "an" and "the"
include the plural forms. The terms "about" and "approximately"
usually indicate a given value, or within 20%, preferably within
10%, and more preferably within 5% of a range; if a given amount is
an approximate amount, it may imply the term "about" or
"approximately" in a non-specified way. The term "mesoporous"
indicates that the pore diameter of a pore is between 2 to 50
nm.
[0016] The present disclosure provides a composition having
anti-fogging and heat-insulating functions, which includes:
[0017] a mesoporous material;
[0018] co-doped tungsten oxide as shown in formula (I)
M.sub.xWO.sub.3-yA.sub.y
[0019] wherein M is an alkali metal element, W is tungsten, O is
oxygen, A is halogen, 0<x.ltoreq.1, and 0<y.ltoreq.0.5;
and
[0020] organic polysiloxane.
[0021] The present disclosure provides, a method for preparing a
coating composition, which includes the steps of: preparing a
mesoporous material, co-doped tungsten oxide as shown in formula
(I), and organic polysiloxane; and mixing the mesoporous material,
the co-doped tungsten oxide as shown in formula (I), and the
organic polysiloxane. Specifically, the method includes preparing
the mesoporous material by a sol-gel method; co-doping tungsten
oxide with anions and cations; synthesizing the organic
polysiloxane by hydrolysis; and blending the mesoporous material,
the co-doped tungsten oxide and the organic polysiloxane, thereby
forming the coating composition having anti-fogging and
heat-insulating functions.
[0022] In the present disclosure, the mesoporous material can
include a precursor, a surfactant, and mesoporous particles. The
mesoporous material is prepared by synthesizing the precursor; and
self-assembling micelles and nanoparticles formed by using the
surfactant in a solvent, so as to make the nanoparticles form
mesoporous particles each having a mesoporous structure; and then
blending the precursor and the mesoporous particles.
[0023] Specifically, silane or siloxane (e.g., tetraethoxysilane
(TEOS), tetramethoxysilane (TMOS)), and a non-ionic surfactant
(e.g., a surfactant with a ethylene oxide-propylene oxide-ethylene
oxide triblock copolymer (e.g., P123
(HO(CH.sub.2CH.sub.2O).sub.20(CH.sub.2CH(CH.sub.3)O).sub.70(CH.sub.2CH.su-
b.20).sub.20H) and F127
(HO(CH.sub.2CH.sub.2O).sub.106(CH.sub.2CH(CH.sub.3)O).sub.70(CH.sub.2CH.s-
ub.2O).sub.106H)) can be selected to synthesize a precursor. The
precursor is an inorganic porous macromolecule, such as inorganic
polysiloxane or polysilane. In an embodiment, the precursor is
prepared by the following steps of: evenly mixing siloxane and a
solvent (e.g., ethanol, water, and hydrochloric acid) to produce a
siloxane solution; evenly mixing a surfactant with a triblock
copolymer and a solvent (e.g., ethanol) to produce a surfactant
solution; thoroughly mixing the siloxane solution and the
surfactant solution; and then setting at room temperature to allow
Si--OR of the siloxane molecules to stepwisely hydrolyze to
generate Si--OH, and the siloxane molecules polymerize to form the
precursor by dehydrating hydroxyl groups or undergoing
dealcoholization. In an embodiment, the inorganic polysiloxane
molecule can retain hydroxyl groups as surface functional groups,
by controlling the pH value, temperature, and time for the
reaction.
[0024] A cationic surfactant can be selected as a template for
preparing mesoporous particles. In an embodiment, the mesoporous
particles are prepared by the following steps of: dissolving a
cationic surfactant, cetrimonium bromide (CTABr), in
polyoxyethylene-8-octyl-phenylether (Trinton-X-100) and
concentrated hydrochloric acid to form a surfactant solution,
wherein CTABr can form micelles in the solution; adding
nanoparticles (e.g., nano silicon particles of silica) to the
surfactant solution; setting after stirring to allow the
nanoparticles to self-assemble on a template; washing with ionic
water/ethanol several times; and then removing the template to
obtain the mesoporous particles. In an embodiment, the mesoporous
particles required by the present disclosure can be controlled by
the selection of the surfactant used (i.e., the arrangement of the
template) and the adjustment of the reaction conditions such as pH
value, temperature, and time for the self-assembling reaction. For
example, the size of the particle diameter of the mesoporous
particle can be greater than about 50 nm, such as greater than
about 100 nm, such as between 200 nm to 1000 nm, and the specific
surface area of a mesoporous particle can be greater than about 800
cm.sup.2/g.
[0025] Moreover, a tungsten oxide co-doped with anions and cations
is prepared by the steps of: adding an alkali metal salt and a
halogen salt at appropriate proportions during the process for
synthesizing tungsten oxide; and heating the mixture from
300.degree. C. to 800.degree. C. in a hydrogen reduction
environment, thereby obtaining the co-doped tungsten oxide powder
having a chemical structure of M.sub.xWO.sub.3-yA.sub.y, wherein M
is an alkali metal element, W is tungsten, O is oxygen, A is
halogen, 0<x.ltoreq.1, and 0<y.ltoreq.0.5.
[0026] More specifically, the precursor for synthesizing tungsten
oxide can be selected from ammonium metatungstate, ammonium
orthotungstate, ammonium paratungstate, alkali metal tungstate,
tungstic acid, tungsten silicide, tungsten sulfide, tungsten
oxychloride, tungsten alkoxide, tungsten hexachloride, tungsten
tetrachloride, tungsten bromide, tungsten fluoride, tungsten
carbide, carbon tungsten oxide, or other salts containing tungsten.
The alkali metal salts can be selected from at least one of alkali
metal carbonate, alkali metal bicarbonate, alkali metal nitrate,
alkali metal nitrite, alkali metal hydroxide, alkali metal
halogenated salt, alkali metal sulfate, alkali metal sulfite, and
other alkali metal-containing salts. The halogenated salt can be
selected from halogenated amine, organic ammonium salts,
halogenated carbon, halogenated hydrogen, halogenated tungsten,
halogenated benzene, halogenated aromatic group, halogenated
alkane, or other halogen-containing salts. The preparation and
characteristics of the above tungsten oxide co-doped with anions
and cations can be referred to TW I402218, which is a patent owned
by the Applicant, the entirely of which is incorporated by
reference herein.
[0027] After the co-doped tungsten oxide is obtained, it can be
subjected to a grinding process, in order to control the size of
the particle diameter of the co-doped tungsten oxide required by
the present disclosure. The particle diameter of the co-doped
tungsten oxide can be no more than 100 nm, such as between 50 to
100 nm, such as between 60 to 80 nm. During the above grinding
process, a small amount of inorganic metal oxide, such as silica
and/or titanium oxide and/or aluminum oxide and/or zirconium oxide
is added, and the inorganic metal oxide is wrapped around the outer
surface of the co-doped tungsten oxide, so as to avoid aggregation
and the change in the surface characteristics of the particles of
co-doped tungsten oxide. Further, a small amount of silane, tilane
or organic metal groups can also be added to modify the surface
properties of the co-doped tungsten oxide, so as to increase the
dispersibility of the co-doped tungsten oxide in an organic solvent
or a polymer and the compatibility of the co-doped tungsten oxide
with an organic solvent or a polymer.
[0028] Moreover, the process of synthesizing an organic
polysiloxane by hydrolysis includes the steps of providing a
siloxane monomer (e.g., 3-(2,3-glycidoxy)propyltrimethoxysilane or
vinyltrimethoxysilane), wherein siloxane monomer includes at least
one functional group selected from a vinyl group, an acrylic acid
group, and an ethoxy group; dissolving the siloxane monomer in an
acidic solvent (e.g., hydrochloric acid aqueous solution), wherein
the pH value of the reaction solution is from 1 to 5, the reaction
temperature is from 10.degree. C. to 40.degree. C., and the
reaction time is from 0.5 to 5 hours; and conducting
hydrolysis-polymerization at room temperature while stirring. After
completion of the reaction, distillation is conducted at a reduced
pressure to extra additional solvent, and thereby obtaining the
organic polysiloxane.
[0029] After the mesoporous material, co-doped tungsten oxide and
organic polysiloxane are prepared, the mesoporous material and
co-doped tungsten oxide with appropriate particle diameters are
screened for and selected, wherein the ratio of the particle
diameter of a mesoporous particle (e.g., a mesoporous silicon
particle) to that of the co-doped tungsten oxide can be from 20:1
to 1:1, such as from 20:1 to 2:1, such as from 16:1 to 2:1. The
mesoporous material, the co-doped tungsten oxide and the organic
polysiloxane are blended in an appropriate weight ratio ranging,
for example, from 42.5:57:0.5 to 8.5:76.5:15, so as to make the
mesoporous material and the co-doped tungsten oxide to evenly
disperse in the organic polysiloxane. As a result, a coating
composition having anti-fogging and heat-insulating functions is
obtained.
[0030] The present disclosure further provides a film having
anti-fogging and heat-insulating functions. FIG. 1 is a schematic
sectional view of a film according to the present disclosure. As
shown in FIG. 1, a film 1 having anti-fogging and anti-insulating
functions includes a transparent layer 11 having anti-fogging and
insulating functions formed on a substrate 12. The substrate 12 can
be glass or plastic. The plastic can be selected from, but not
limited to, polyethylene (PE), polyethylene terephthalate (PET),
polyimide, etc.
[0031] As shown in FIG. 1, the transparent layer 11 can be
constituted by a matrix 113, a plurality of mesoporous silicon
particles 111, and co-doped tungsten oxide 112 as shown in formula
(1). In an embodiment, the matrix 113 is a continuous layer formed
by organic polysiloxane, the mesoporous silicon particles 111 are
dispersed in the matrix 113, any two of the mesoporous silicon
particles 111 are spaced apart, and the co-doped tungsten oxide 112
is embedded in the matrix 113, and located between any two of the
mesoporous silicon particles 111.
[0032] In an embodiment, the matrix 113 can further includes a
precursor, a surfactant, and the like. The precursor is an
inorganic polysilane or polysiloxane molecule having a hydrophilic
group, which can increase the hydrophilicity of the transparent
layer 11. Organic polysiloxane provides adhesion and support, such
that it can effectively improve the film formation and thickness of
the transparent layer 11. The thickness of the transparent layer 11
can be about 0.1 .mu.m or higher, such as about 1 .mu.m or higher,
such as from 1 to 50 .mu.m. Moreover, the surfaces of the
mesoporous silicon particles 111 also have hydrophilic groups. The
affinity between the matrix 113 and each of the mesoporous silicon
particles 111 allow any two of the mesoporous silicon particles 111
to be dispersed in the matrix 113 in a way that they are spaced
part. The width W of the spacing parallel to a surface of the
matrix 113 can be greater than about 50 nm. In another embodiment,
the spacing on a surface parallel to a surface of the matrix can be
no more than 50 nm. The co-doped tungsten oxide 112 has a structure
of M.sub.xWO.sub.3-yA.sub.y, wherein M is a metal alkali element, W
is tungsten oxide, O is oxygen, A is halogen, 0<x.ltoreq.1, and
0<y.ltoreq.0.5. The particle diameter of a mesoporous silicon
particle 111 can be from 50 to 1000 nm. The specific surface area
of a mesoporous silicon particle can be greater than 800
cm.sup.2/g. The particle diameter of the co-doped tungsten oxide
112 can be from 50 to 100 nm. In order to fill the co-doped
tungsten oxide 112 in the space among the plurality of mesoporous
particles 111, the ratio of the particle diameter of the mesoporous
silicon particle 111 to that of the co-doped tungsten oxide 112 can
be from 20:1 to 1:1, such as from 20:1 to 2:1, such as from 16:1 to
2:1.
[0033] In an embodiment, as the mesoporous silicon particles 111
and the co-doped tungsten oxide 112 in an appropriate ratio of
particle diameter is selected in the present disclosure, the apexes
of a portion of the mesoporous silicon particles 111 protrude from
a surface of the matrix 113. The hydrophilic groups on the surfaces
of the mesoporous silicon particles 111 and the matrix 113 can
cause the contact angle of a water molecule on a surface of the
transparent layer 111 to rapidly decrease to 0.degree. from
10.degree., so that the film 1 imparts an anti-fogging effect.
Further, the alkali metal and the halogenated co-doped tungsten
oxide 112 have high conductivity, such that 74% or more of the
infrared ray with a wavelength of 800 nm or higher can be
effectively blocked. Hence, the film 1 has a heat-insulating
function for blocking infrared ray, while maintaining the
transmittance of visible light to 60%, or even 80% or higher.
[0034] In the present disclosure further provided is a method for
preparing a film having anti-fogging and heat-insulating functions.
The method includes the steps of coating the coating composition
described above in the present disclosure on a substrate; and
drying the coating composition to form a transparent film on a
surface of the substrate.
[0035] In an embodiment of the present disclosure, the mesoporous
material, the co-doped tungsten oxide and the organic polysiloxane
in the coating composition are in a weight ratio ranging from
42.5:57:0.5 to 8.5:76.5:15. The thickness of the coating can be
from 0.1 to 50 .mu.m. In an embodiment, the coating composition
according to the present disclosure can be dried at a lower
temperature (such as no higher than 100.degree. C., such as can be
no higher than 60.degree. C.) to remove the solvent and/or
surfactant, and thereby forming a transparent layer having
anti-fogging and heat-insulating functions on the substrate.
[0036] The followings specifically exemplify the coating
compositions in the examples and the weight proportion (%) of each
of the ingredients in the comparative examples in the present
disclosure, wherein the precursor solution was prepared by
dissolving inorganic polysiloxane prepared from tetraethoxysilane
in a solution of ethanol and water, and the solid ingredient of the
inorganic polysiloxane can be about 10%; the mesoporous silicon
particles were solids; the co-doped tungsten oxide solution was
prepared by dissolving the co-doped tungsten oxide in a toluene
solution, and the solid ingredient of the co-doped tungsten oxide
was about 20%; the polysiloxane solution was prepared by dissolving
organic polysiloxane prepared from
3-(2,3-glycidoxy)propyltrimethoxysilane in a solution of ethanol
and water, and the solid ingredient of the organic polysiloxane is
about 75%.
COATING COMPOSITION EXAMPLE 1
TABLE-US-00001 [0037] Precursor solution 38.02% Mesoporous silicon
particles 0.18% Co-doped tungsten oxide solution 57.03% Organic
polysiloxane solution 4.77%
COATING COMPOSITION EXAMPLE 2
TABLE-US-00002 [0038] Precursor solution 18.99% Mesoporous silicon
particles 0.32% Co-doped tungsten oxide solution 75.94% Organic
polysiloxane solution 4.75%
COATING COMPOSITION EXAMPLE 3
TABLE-US-00003 [0039] Precursor solution 18.96% Mesoporous silicon
particles 0.45% Co-doped tungsten oxide solution 75.85% Organic
polysiloxane solution 4.74%
COMPARATIVE EXAMPLE 1
TABLE-US-00004 [0040] Precursor solution 90.78% Mesoporous silicon
particles 0.57% Organic polysiloxane solution 9.13%
COMPARATIVE EXAMPLE 2
TABLE-US-00005 [0041] Precursor solution 57.14% Mesoporous silicon
particles 38.10% Organic polysiloxane solution 4.76%
COMPARATIVE EXAMPLE 3
TABLE-US-00006 [0042] Precursor solution 89.47% Mesoporous silicon
particles 0.10% Organic polysiloxane solution 1.88%
COMPARATIVE EXAMPLE 4
TABLE-US-00007 [0043] Co-doped tungsten oxide solution 100%
[0044] The phenomenon of the particle aggregation and precipitation
(i.e., gelling) occurred shortly in comparative examples 1 and 2
after blending, such that the products have a storage problem and
cannot form continuous coatings. Although a portion of particles
aggregated in examples 1 and 3 after a longer period of time, the
effect of use was not affected. It is clear that the unique design
of the compositional ratio of each of the ingredients can allow a
mixture to be stable.
[0045] Each of the compositions in coating composition examples 1-3
and comparative examples 3 and 4 was coated on a transparent glass,
and dried to form film examples 1-3, an anti-fogging film of
comparative example 3, and heat-insulating film of comparative film
4. A Fourier transform infrared spectroscopy (FTIR) was used to
measure the weight ratios of the ingredients of film examples 1-3,
and the results of the measurements are shown in Table 1. The
contact angles of water on film examples 1-3, the anti-fogging film
of comparative example 3, and the heat-insulating film of
comparative example 4 were measured. The transmittance of visible
light and blockage of infrared ray were measured with a visible ray
spectrometer (UV-VIS) and FTIR, respectively. The results of the
measurements are shown in Table 2.
TABLE-US-00008 TABLE 1 Weight ratio of ingredient Film Film Film
example 1 example 2 example 3 Precursor 20.06% 9.06% 9.0%
Mesoporous silicon particle 0.94% 1.55% 2.12% Co-doped tungsten
oxide 60.17% 72.41% 72.01% Organic polysiloxane 18.83% 16.98%
16.87%
TABLE-US-00009 TABLE 2 Film Film Film Compar- Compar- exam- exam-
exam- ative ative ple 1 ple 2 ple 3 example 3 example 4 Contact
angle of 8.7 to 0 9.6 to 0 7.0 to 0 7.4 89.6 water Visible light 80
74 60 91 69 transmittance (%) Blockage of 74 84 97 11 94 infrared
ray (%)
[0046] From the above, the coating composition according to the
present disclosure includes a mesoporous material, co-doped
tungsten oxide and organic polysiloxane, wherein the mesoporous
material has an anti-fogging effect, and the co-doped tungsten
oxide has an heat insulating effect from blocking infrared ray. As
such, the coating composition according to the present disclosure
has a composite effect of anti-fogging and heat insulation. In an
embodiment of the present disclosure, the mesoporous silicon
particles and the co-doped tungsten oxide are successfully combined
at uniquely designed compositional ratio, so as to make the formed
film impart excellent hydrophilicity, transmittance of visible
light transmittance, and blockage of infrared ray. Hence, the
coating composition is suitable for use in the automobile,
architectural and agricultural industries, for achieving the
effects of energy conservation, heat insulation and
anti-fogging.
[0047] The above examples are provided only to illustrate the
principle and effect of the present disclosure, and they do not
limit the scope of the present disclosure. One skilled in the art
should understand that, modifications and alterations can be made
to the above examples, without departing from the spirit and scope
of the present disclosure. Therefore, the scopes of the present
disclosure should be accorded to the disclosure of the appended
claims.
* * * * *