CN114656160B - High-light-transmittance mildew-proof glass and preparation method thereof - Google Patents
High-light-transmittance mildew-proof glass and preparation method thereof Download PDFInfo
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- CN114656160B CN114656160B CN202210277405.4A CN202210277405A CN114656160B CN 114656160 B CN114656160 B CN 114656160B CN 202210277405 A CN202210277405 A CN 202210277405A CN 114656160 B CN114656160 B CN 114656160B
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- 239000011521 glass Substances 0.000 title claims abstract description 84
- 238000002834 transmittance Methods 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 57
- 239000011248 coating agent Substances 0.000 claims abstract description 55
- 230000004888 barrier function Effects 0.000 claims abstract description 39
- 239000002105 nanoparticle Substances 0.000 claims abstract description 35
- 229920005989 resin Polymers 0.000 claims abstract description 32
- 239000011347 resin Substances 0.000 claims abstract description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 31
- 239000010703 silicon Substances 0.000 claims abstract description 31
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 21
- 229920002050 silicone resin Polymers 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims abstract description 5
- 125000000524 functional group Chemical group 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 4
- CTLDFURRFMJGON-UHFFFAOYSA-N dimethoxy-methyl-(3-piperazin-1-ylpropyl)silane Chemical compound CO[Si](C)(OC)CCCN1CCNCC1 CTLDFURRFMJGON-UHFFFAOYSA-N 0.000 claims description 33
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 20
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 16
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 12
- 230000002378 acidificating effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000012046 mixed solvent Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 230000007062 hydrolysis Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 4
- 230000003301 hydrolyzing effect Effects 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 21
- 230000002209 hydrophobic effect Effects 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 13
- 239000000377 silicon dioxide Substances 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000003075 superhydrophobic effect Effects 0.000 description 3
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 2
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 125000005375 organosiloxane group Chemical group 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 125000004193 piperazinyl group Chemical group 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- -1 functional group siloxane Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
- C03C17/008—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character comprising a mixture of materials covered by two or more of the groups C03C17/02, C03C17/06, C03C17/22 and C03C17/28
- C03C17/009—Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/78—Coatings specially designed to be durable, e.g. scratch-resistant
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/112—Deposition methods from solutions or suspensions by spraying
Abstract
The invention provides high-light-transmittance mildew-proof glass and a preparation method thereof. The height is highThe light-transmitting mildew-proof glass comprises a glass base layer and a blocking mildew-proof coating coated on the surface layer of the glass base layer; the barrier mildew-proof coating comprises 1:1 hydrophobically modified SiO in a mass ratio of (1.5-3) 2 Nanoparticles and silicone resins; the number of the functional groups of the organic silicon resin is more than 2, which is used for realizing the SiO 2 Chemical attachment of nanoparticles to the glass substrate. According to the invention, a layer of compact barrier coating is prepared on the surface of glass through high-content hydrophobic modified silicon dioxide, so that high-efficiency barrier mildew prevention is realized, and meanwhile, the durability and the light transmittance of the coating are improved through modified organic silicon resin, so that the problem of light transmittance reduction caused by the compact coating is prevented.
Description
Technical Field
The invention relates to the technical field of functional glass, in particular to high-light-transmittance mildew-proof glass and a preparation method thereof.
Background
Water or moisture is easily adsorbed on the glass surface. Subsequently, water or moisture diffuses into the glass. The soluble silicate in the surface layer is hydrolyzed and destroyed. Firstly, sodium silicate, potassium silicate and the like are hydrolyzed and destroyed. Caustic soda (NaOH) is formed and SiO is separated off 2 . SiO separated out 2 A silica gel is formed which forms a protective film on the glass surface which prevents further erosion. Caustic soda formed by hydrolysis reacts with carbon dioxide in the air to form sodium carbonate, which is accumulated on the surface of glass to form soluble salts in the surface film. Due to its strong hygroscopicity, it absorbs moisture and deliquesces, eventually forming droplets of lye. As the ambient temperature, humidity change, the concentration of these droplets also changes. If the concentrated lye droplets are in prolonged contact with the glass, the gel-like silica film may be partially dissolved therein, causing severe localized attack of the glass surface, forming spots.
The prior art realizes the self-cleaning and mildew-proof functions by constructing the super-hydrophobic coating on the surface of the glass, and prevents the corrosion and damage of the surface layer of the glass. For example, patent CN108912754A discloses a superhydrophobic SiO 2 A preparation method and application of nano functional liquid,the fluorine-free organosiloxane is used for modifying the silicon dioxide nano particles, and then the silicon dioxide nano particles are coated on a glass substrate, so that the super-hydrophobic surface structure with the contact angle of 164.4 degrees can be obtained, and the fluorine-free organosiloxane has a certain mildew-proof effect. However, in this way, on the one hand, the silica particles are directly coated on the surface of the glass, and the connection strength between two solids is low, so that the durability is poor; on the other hand, the mere coating of the silica nano functional liquid can obviously reduce the light transmittance of the glass and influence the use of the transparent glass. Therefore, how to ensure the long-acting mold blocking and light transmittance of the glass at the same time is a problem to be solved.
In view of the foregoing, there is a need for an improved high light transmittance and mildew-proof glass and a method for preparing the same, which solve the above-mentioned problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide high-light-transmittance mildew-proof glass and a preparation method thereof. A layer of compact barrier coating is prepared on the surface of glass through high-content hydrophobic modified silicon dioxide, so that efficient barrier and mildew resistance are realized, and meanwhile, the durability and the light transmittance of the coating are improved through modified organic silicon resin, so that the problem of light transmittance reduction caused by the compact coating is prevented.
In order to achieve the aim, the invention provides high-light-transmittance mildew-proof glass which comprises a glass base layer and a blocking mildew-proof coating coated on the surface layer of the glass base layer; the barrier mildew-proof coating comprises 1:1 hydrophobically modified SiO in a mass ratio of (1.5-3) 2 Nanoparticles and silicone resins; the number of the functional groups of the organic silicon resin is more than 2, which is used for realizing the SiO 2 Chemical attachment of nanoparticles to the glass substrate.
As a further development of the invention, the hydrophobically modified SiO 2 The modifier of the nano-particles is amino propyl trimethoxy silane, mercapto propyl trimethoxy silane or 3-piperazinyl propyl methyl dimethoxy silane.
As a further improvement of the present invention, the silicone resin contains 3-piperazinylpropyl methyl dimethoxy silane.
As a further modification of the inventionFurthermore, the barrier mildew-proof coating is obtained by spraying the barrier mildew-proof coating on the surface of the glass base layer; the hydrophobically modified SiO in the barrier mildew-resistant coating 2 The mass content of the nano particles is 20% -40%, the total solid content of the barrier mildew-proof coating is 30% -65%, and the solvent of the barrier mildew-proof coating comprises n-butyl alcohol or formamide.
The preparation method of the high-light-transmittance mildew-proof glass, which comprises the following steps:
s1, modifying the hydrophobicity of SiO 2 Dispersing the nano particles in a mixed solvent consisting of n-butanol or formamide and water, then adding organic silicon resin, and uniformly mixing to obtain the barrier mildew-proof coating;
s2, spraying the barrier mildew-proof coating on the surface of the glass base layer, and drying and curing to obtain the high-light-transmittance mildew-proof glass.
As a further improvement of the present invention, in step S1, the components of the silicone resin include methyltriethoxysilane and 3-piperazinylpropyl methyldimethoxysilane.
As a further improvement of the invention, the mass ratio of methyltriethoxysilane to 3-piperazinylpropyl methyldimethoxysilane is (70%: 30%) - (90%: 10%).
As a further improvement of the present invention, the method for preparing the silicone resin comprises: and (3) carrying out hydrolysis reaction on methyltriethoxysilane for 1-2 hours under an acidic condition, and then adding 3-piperazinylpropyl methyldimethoxy silane to continue hydrolysis for 1-2 hours under the acidic condition, so as to obtain the organic silicon resin with the network structure and the edge mainly comprising 3-piperazinylpropyl methyldimethoxy silane.
As a further improvement of the present invention, in step S1, the water content of the mixed solvent is 5wt% to 20wt% in step S1.
As a further improvement of the invention, the light transmittance of the high-light-transmittance mildew-proof glass is 2% -10% higher than that of the glass base layer.
The beneficial effects of the invention are as follows:
1. according to the high-light-transmittance mildew-proof glass and the preparation method thereof, a layer of compact barrier coating is prepared on the surface of the glass through the high-content hydrophobic modified silicon dioxide, so that high-efficiency barrier mildew prevention is realized, and meanwhile, the durability and the light transmittance of the coating are improved through the modified organic silicon resin, so that the problem of light transmittance reduction caused by the compact coating is prevented.
2. The invention firstly aims at SiO of nano silica sol 2 The nano particles are subjected to surface hydrophobic modification, and organosilane micromolecules with double functional groups are grafted on the nano particles to obtain hydrophobic high-activity nano SiO 2 The particles are linked with modified nano SiO by using organic silicon resin (also double functional group siloxane) 2 The particles and the surface of the glass obviously improve the wear resistance and barrier property of the coating, and simultaneously can ensure the mildew resistance and light transmittance of the glass.
3. Preferred 3-piperazinylpropyl methyldimethoxysilane modified SiO according to the invention 2 The nano particles and the organic silicon resin with the edge mainly containing 3-piperazinyl propyl methyl dimethoxy silane are used as coating components, and the compactness and the light transmittance of the prepared glass coating are obviously better.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to specific embodiments.
It should be further noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and/or processing steps closely related to aspects of the present invention are shown in the specific embodiments, and other details not greatly related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The high-light-transmittance mildew-proof glass provided by the invention comprises a glass base layer and a blocking mildew-proof coating coated on the surface layer of the glass base layer;the barrier mildew-proof coating comprises hydrophobically modified SiO with the mass ratio of (1.5-3): 1 2 Nanoparticles and silicone resins; the number of the functional groups of the organic silicon resin is more than 2, which is used for realizing SiO 2 Chemical attachment of the nanoparticles to the glass substrate. In this way, a high content of hydrophobically modified SiO 2 The nano particles endow the coating with high barrier property, hydrophobicity and wear resistance, so that the glass has good long-acting mildew resistance; surface active groups of organic silicon resin as hydrophobically modified SiO 2 The bridge between the nano particles and the solid proportion plays a role in connection and solidification, improves the film forming property and transparency of the coating, and prevents excessive SiO 2 Nanoparticles cause the problem of reduced light transmittance of the glass. Hydrophobically modified SiO 2 The mass ratio of the nanoparticles to the silicone resin is preferably (2-2.5): 1.
Hydrophobically modified SiO 2 The modifier of the nano particles is amino propyl trimethoxy silane, mercapto propyl trimethoxy silane or 3-piperazinyl propyl methyl dimethoxy silane, preferably 3-piperazinyl propyl methyl dimethoxy silane, on the one hand, piperazinyl is not easy to oxidize, and the heat resistance is better; on the other hand, the piperazinyl has good antibacterial and mildew-proof effects. And the modified silicon dioxide has better matching property with the glass base layer, thereby being helpful to ensure the light transmittance of the coating.
Preferably, the silicone resin comprises 3-piperazinylpropyl methyl dimethoxy silane. The preparation method of the organic silicon resin comprises the following steps: and (3) carrying out hydrolysis reaction on methyltriethoxysilane for 1-2 hours under an acidic condition, and then adding 3-piperazinylpropyl methyldimethoxy silane to continue hydrolysis for 1-2 hours under the acidic condition, so as to obtain the organic silicon resin with the network structure and the edge mainly comprising 3-piperazinylpropyl methyldimethoxy silane. The mass ratio of methyltriethoxysilane to 3-piperazinylpropyl methyldimethoxysilane was (70%: 30%) - (90%: 10%).
In the operation, the methyltriethoxysilane is subjected to hydrolysis reaction for a certain time to form a certain cross-linked resin network, and then the 3-piperazinyl propyl methyl dimethoxy silane is added to enable the main hydrolysis condensation to exist at the edge of a network structure; and because the addition amount of the 3-piperazinyl propyl methyl dimethoxy silane is less than that of methyl triethoxy silane, the organic silicon resin also contains more active alkoxy groups, so that the organic silicon resin is convenient to be used as a bonding bridge between silicon dioxide and glass.
The barrier mildew-proof coating is obtained by spraying the barrier mildew-proof coating on the surface of the glass base layer; hydrophobically modified SiO in barrier mildew-resistant coatings 2 The mass content of the nano particles is 20% -40%, preferably 30% -35%; the total solid content of the barrier mildew-proof paint is 30-65%, preferably 40-60%; the solvent of the barrier mildew-resistant coating comprises n-butanol or formamide. The addition of n-butanol or formamide can effectively improve the hydrophobically modified SiO 2 The dispersibility and permeability of the nanoparticles, thereby increasing the light transmittance of the coating. The paint can also be added with hardening agent, curing agent, film forming agent and other auxiliary agents.
The preparation method of the high-light-transmittance mildew-proof glass in any one of the above steps comprises the following steps:
s1, modifying the hydrophobicity of SiO 2 Dispersing the nano particles in a mixed solvent consisting of n-butanol or formamide and water, then adding organic silicon resin, and uniformly mixing to obtain the barrier mildew-proof coating; the volume ratio of n-butanol or formamide to water is (70%: 30%) - (90%: 10%).
S2, spraying the barrier mildew-proof coating on the surface of the glass base layer, and drying and curing to obtain the high-light-transmittance mildew-proof glass.
In step S1, the water content in the mixed solvent is 5wt% to 20wt% in step S1.
The light transmittance of the high-light-transmittance mildew-proof glass is 2% -10% higher than that of the glass base layer. This is because the barrier coating constructed in accordance with the present invention acts to provide an anti-reflection effect on the glass surface, thereby increasing the transmittance of the glass.
Example 1
The high-light-transmittance mildew-proof glass is prepared by the following steps:
s1, modifying the hydrophobicity of SiO 2 Dispersing the nano particles in a mixed solvent consisting of n-butanol and water (volume ratio is 85 percent: 15 percent), then adding the organic silicon resin, the hardening agent and the curing agent, and uniformly mixing to obtain the barrier and anti-blocking materialMold coating;
wherein, the SiO modified by hydrophobic in the barrier mildew-proof coating 2 The mass content of the nano particles is 30%, the content of the organic silicon resin is 15%, and the total solid content is 50%. Hydrophobically modified SiO 2 The nano particles are SiO modified by 3-piperazinyl propyl methyl dimethoxy silane 2 A nanoparticle; the silicone resin is prepared by the following steps:
and (3) carrying out hydrolysis reaction on methyltriethoxysilane for 1h under an acidic condition, and then adding 3-piperazinylpropyl methyldimethoxy silane to continue hydrolysis for 2h under the acidic condition, so as to obtain the organic silicon resin with the network structure and the edge mainly comprising 3-piperazinylpropyl methyldimethoxy silane. The mass ratio of the methyltriethoxysilane to the 3-piperazinylpropyl methyldimethoxysilane is 80%:20%.
S2, spraying the barrier mildew-proof coating on the surface of the glass base layer, and drying and curing to obtain the high-light-transmittance mildew-proof glass.
Examples 2 to 5
A high light transmittance, mildew-resistant glass differs from example 1 in that the hydrophobically modified SiO 2 The contents of the nanoparticles and the silicone resin are shown in table 1, and the other contents are substantially the same as those in example 1, and are not described herein.
Mildew resistance was tested according to standard GBT 1741-2007.
TABLE 1 preparation conditions and test results for examples 1-5
As can be seen from Table 1, the invention can prepare a coating with low porosity and high compact barrier property by controlling the content and the proportion of silicon dioxide and organic silicon resin, thereby improving the light transmittance and the mildew resistance of glass.
Example 6
A high light transmittance, mildew-resistant glass differs from example 1 in that the hydrophobically modified SiO 2 The nano particles are amino propyl trimethoxy silane modified SiO 2 A nanoparticle; others andembodiment 1 is substantially the same and will not be described in detail herein.
Examples 7 to 8
Compared with the example 1, the high-light-transmittance mildew-proof glass is characterized in that the mass ratio of methyltriethoxysilane to 3-piperazinyl propyl methyl dimethoxy silane in the organic silicon resin is 70 percent: 30% (example 7) and 90%:10% (example 8). The other points are substantially the same as those of embodiment 1, and will not be described here again.
Comparative example 1
The high light transmittance mildew-proof glass is different from example 1 in that the 3-piperazinylpropyl methyl dimethoxy silane in the silicone resin is replaced by dimethyl dimethoxy silane. The other points are substantially the same as those of embodiment 1, and will not be described here again.
Comparative example 2
The high light transmittance mildew-proof glass is different from example 1 in that the silicone resin is prepared by the following steps: and (3) simultaneously adding methyltriethoxysilane and 3-piperazinyl propyl methyl dimethoxy silane into a reaction system, and carrying out hydrolysis reaction for 2 hours to obtain the organic silicon resin.
TABLE 2 preparation conditions and test results for examples 6-8 comparative examples 1-2
| Examples | Transmittance (%) | Coating porosity (%) | Mildew resistant grade |
| Example 6 | 87.71 | 8.4 | 1 |
| Example 7 | 87.62 | 9.1 | 2 |
| Example 8 | 87.29 | 9.5 | 2 |
| Comparative example 1 | 86.52 | 10.8 | 3 |
| Comparative example 2 | 86.42 | 10.5 | 2 |
As can be seen from Table 2, when the kind and content of the nitrogen-containing silane used in the silica or the silicone resin are changed, the light transmittance and the mold resistance are reduced to different extents, wherein the 3-piperazinylpropyl methyl dimethoxy silicon in the silicone resin has a large influence on the mold resistance. When methyltriethoxysilane and 3-piperazinylpropyl methyldimethoxysilane are added simultaneously to the reaction system, the porosity of the coating layer is increased due to the change of the network structure, and the light transmittance and mildew resistance are reduced.
In summary, according to the high-light-transmittance mildew-proof glass and the preparation method thereof, the high-content hydrophobic modified silicon dioxide is used for preparing the compact barrier coating on the surface of the glass, so that high-efficiency barrier mildew prevention is realized, and meanwhile, the durability and light transmittance of the coating are improved through the modified organic silicon resin, so that the compact coating is prevented from causing light transmittanceThe rate is lowered. Preferred 3-piperazinylpropyl methyldimethoxysilane modified SiO 2 The nano particles and the organic silicon resin with the edge mainly containing 3-piperazinyl propyl methyl dimethoxy silane are used as coating components, and the compactness and the light transmittance of the prepared glass coating are obviously better.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.
Claims (7)
1. The high-light-transmittance mildew-proof glass is characterized by comprising a glass base layer and a blocking mildew-proof coating coated on the surface layer of the glass base layer; the barrier mildew-proof coating comprises hydrophobically modified SiO with the mass ratio of (1.5-3): 1 2 Nanoparticles and silicone resins; the number of the functional groups of the organic silicon resin is more than 2, which is used for realizing the SiO 2 Chemical attachment of nanoparticles to the glass substrate;
the hydrophobically modified SiO 2 The modifier of the nano particles is 3-piperazinyl propyl methyl dimethoxy silane;
the organic silicon resin comprises 3-piperazinyl propyl methyl dimethoxy silane;
the preparation method of the organic silicon resin comprises the following steps: firstly, hydrolyzing methyltriethoxysilane under an acidic condition, and then adding 3-piperazinyl propyl methyl dimethoxy silane to continuously hydrolyze under the acidic condition to obtain organic silicon resin with the edge of a network structure mainly comprising 3-piperazinyl propyl methyl dimethoxy silane;
the mass ratio of the methyltriethoxysilane to the 3-piperazinylpropyl methyldimethoxysilane is (70%: 30%) - (90%: 10%).
2. The high light transmittance, mildew-resistant glass according to claim 1, wherein the barrier mildew-resistant coating is obtained by spraying a barrier mildew-resistant coating onto the surface of the glass substrate; the resistorHydrophobically modified SiO in mildew-resistant coatings 2 The mass content of the nano particles is 20% -40%, the total solid content of the barrier mildew-proof coating is 30% -65%, and the solvent of the barrier mildew-proof coating comprises n-butyl alcohol or formamide.
3. A method for producing the high light-transmitting mildewproof glass as claimed in any one of claims 1 to 2, comprising the steps of:
s1, modifying the hydrophobicity of SiO 2 Dispersing the nano particles in a mixed solvent consisting of n-butanol or formamide and water, then adding organic silicon resin, and uniformly mixing to obtain the barrier mildew-proof coating;
s2, spraying the barrier mildew-proof coating on the surface of the glass base layer, and drying and curing to obtain the high-light-transmittance mildew-proof glass.
4. A method for producing a high light-transmitting mold-resistant glass according to claim 3, wherein in step S1, the components of the silicone resin include methyltriethoxysilane and 3-piperazinylpropyl methyldimethoxysilane.
5. The method for preparing high light transmittance and mildew-proof glass according to claim 4, wherein the method for preparing the organic silicon resin comprises the following steps: and (3) carrying out hydrolysis reaction on methyltriethoxysilane for 1-2 hours under an acidic condition, and then adding 3-piperazinylpropyl methyldimethoxy silane to continue hydrolysis for 1-2 hours under the acidic condition, so as to obtain the organic silicon resin with the network structure and the edge mainly comprising 3-piperazinylpropyl methyldimethoxy silane.
6. The method for producing a high light-transmitting mold-proof glass according to claim 3, wherein in step S1, the water content in the mixed solvent is 5wt% to 20wt% in step S1.
7. The method for producing a high light-transmitting mold-resistant glass according to claim 3, wherein the high light-transmitting mold-resistant glass has a light transmittance 2% to 10% higher than that of the glass base layer.
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