CN111423772B - Anti-fog and anti-fog coating and preparation method thereof - Google Patents
Anti-fog and anti-fog coating and preparation method thereof Download PDFInfo
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- CN111423772B CN111423772B CN202010374089.3A CN202010374089A CN111423772B CN 111423772 B CN111423772 B CN 111423772B CN 202010374089 A CN202010374089 A CN 202010374089A CN 111423772 B CN111423772 B CN 111423772B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Surface Treatment Of Optical Elements (AREA)
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Abstract
The invention discloses an antifogging and antifogging coating and a preparation method thereof. The hydrophilic polymer network and the polyhydric alcohol in the prepared antifogging and antifogging coating can form a cross-linked network structure through mutual connection of hydrogen bonds, so that the prepared antifogging and antifogging coating has excellent water absorption and storage performance and antifogging performance, and meanwhile, the prepared antifogging and antifogging coating has excellent optical property, high light transmittance and high wear resistance.
Description
Technical Field
The invention relates to the field of preparation of antifogging coatings, in particular to an antifogging and antifogging coating and a preparation method thereof.
Background
In life, transparent materials, devices and equipment such as agricultural greenhouse films/films, food packaging films, Polycarbonate (PC), helmet visors, face masks, commercial freezer windows, automobile lights, lenses, etc. are rarely used. However, when the external temperature changes, the surfaces of the transparent materials are often fogged, frosted and even frozen, which brings great trouble to the work and life of people. For example, medical isolation eye shields for doctors are very easy to fog during use, and the fog on the eye shields can interfere with the sight of doctors, thereby seriously affecting the work.
The existing antifogging and antifogging methods mainly comprise spraying antifogging agents, coating hydrophilic or hydrophobic polymer coatings, or demisting by electric heating. However, these methods have disadvantages of complicated process, poor antifogging effect, short duration, poor abrasion resistance, poor light transmittance, and the like. In addition, some special medical lenses and polymer films have high requirements on antifogging coatings, on one hand, the antifogging coatings need to have high light transmittance, and on the other hand, the surfaces of the antifogging coatings need to be smooth enough to enable light to uniformly penetrate through the films or lenses without refraction, and the prior art is difficult to meet the requirements at the same time.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an antifogging and antifogging coating and a preparation method thereof, and aims to solve the problems of poor antifogging and antifogging effects, poor light transmittance and wear resistance, complex preparation process, high preparation cost and the like of the existing coating.
The technical scheme of the invention is as follows:
a preparation method of an anti-fog and anti-fog coating comprises the following steps:
mixing hydrophilic polymer, polyol and deionized water to prepare antifogging adhesive;
and coating the antifogging glue on the surface of a transparent base material for air drying treatment to form an antifogging and antifogging coating.
The preparation method of the antifogging and antifogging coating comprises the following steps of mixing hydrophilic polymer, polyhydric alcohol and deionized water to prepare the antifogging adhesive:
according to the weight portion, 1-10 portions of polyalcohol, 6-15 portions of hydrophilic polymer and 30-150 portions of deionized water are mixed in a water bath with the temperature of 75-85 ℃, and then the mixed solution is subjected to vacuum defoaming treatment to prepare the antifogging adhesive.
The preparation method of the antifogging and antifogging coating comprises the step of carrying out air drying treatment at the temperature of 30-90 ℃.
The preparation method of the antifogging and antifogging coating comprises the step of preparing the antifogging and antifogging coating, wherein the polyalcohol is one or more of pentaerythritol, ethylene glycol, propylene glycol, butanediol and glycerol.
The preparation method of the antifogging and antifogging coating comprises the step of preparing a hydrophilic polymer, wherein the hydrophilic polymer is one of gelatin, polyacrylamide, sodium polyacrylate and polyvinyl alcohol.
The preparation method of the antifogging and antifogging coating comprises the step of preparing the antifogging and antifogging coating, wherein the purity of the polyhydric alcohol is higher than 95%.
An anti-fog and anti-fog coating is prepared by adopting the preparation method of the anti-fog and anti-fog coating.
Has the advantages that: the invention provides an antifogging and antifogging coating and a preparation method thereof, wherein hydrophilic polymer, polyalcohol and deionized water are mixed to prepare antifogging glue, and then the antifogging glue is coated on the surface of a transparent substrate to be air-dried to form the antifogging and antifogging coating. On the other hand, the invention has simple preparation process, wide raw material source and low preparation cost, takes the deionized water as the solvent, is safe and nontoxic and is beneficial to environmental protection.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the method for preparing the anti-fog and anti-mist coating of the present invention.
FIG. 2 is a graph showing the effect of the antifogging test when the antifogging and antifogging coating prepared in example 1 of the present invention is coated on a culture dish.
FIG. 3 is a graph showing the effect of the antifogging test when the antifogging and antifogging coating prepared in example 1 of the present invention is coated on a culture dish.
FIG. 4 is a graph showing the transmittance of the antifogging and antifogging coating prepared in example 1 of the present invention in the visible range.
Detailed Description
The invention provides an anti-fog and anti-fog coating and a preparation method thereof, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems that the prior antifogging and antifogging method is difficult to meet the requirement of light transmittance, the preparation process is complex, the preparation cost is high and the like when being used on special medical lenses and high polymer films, the invention provides a preparation method of an antifogging and antifogging coating, which comprises the following steps:
s10, mixing the hydrophilic polymer, the polyol and the deionized water to prepare the antifogging glue;
and S20, coating the antifogging glue on the surface of the transparent base material, and performing air drying treatment to form an antifogging and antifogging coating.
In this embodiment, the hydrophilic polymer, the polyol and the deionized water are mixed to prepare the colorless and transparent antifogging adhesive. And then, coating the antifogging glue on the surface of a transparent substrate, and carrying out air drying treatment to remove redundant moisture in the antifogging glue, so as to prepare the antifogging and antifogging coating. Under the synergistic effect of the polymer network and the polyhydric alcohol, the prepared anti-fog and anti-fog coating has excellent water absorption and storage performance, anti-fog and anti-fog performance and high light transmittance. In addition, the hydrophilic coating has good abrasion resistance due to a cross-linked network structure formed inside the hydrophilic coating. Further, the anti-fog and anti-fog coating prepared in the embodiment takes deionized water as a solvent, and is safe, non-toxic, low in price, good in fluidity, simple in preparation process and low in preparation cost.
In this embodiment, the polyhydric alcohol is one or more of pentaerythritol, ethylene glycol, propylene glycol, butylene glycol, and glycerol, and the purity of the polyhydric alcohol is higher than 95%. In the embodiment, industrial common pentaerythritol, ethylene glycol, propylene glycol, butanediol and glycerol are selected as raw materials, so that the preparation cost is low, the purity of the polyhydric alcohol is higher than 95%, the production and the use can be met, the raw materials do not need to be excessively purified, and the preparation process is simple.
Further, the hydrophilic polymer is one of gelatin, polyacrylamide, sodium polyacrylate and polyvinyl alcohol.
In some embodiments, the step S10 of mixing the hydrophilic polymer, the polyol and the deionized water to prepare the anti-fog glue includes:
according to the weight portion, 1-10 portions of polyalcohol, 6-15 portions of hydrophilic polymer and 30-150 portions of deionized water are mixed in a water bath with the temperature of 75-85 ℃, and then the mixed solution is subjected to vacuum defoaming treatment to prepare the antifogging adhesive.
In the embodiment, the hydrophilic polymer, the polyol and the deionized water are mixed under the water bath condition of 75-85 ℃ so that the added hydrophilic polymer, the polyol and the deionized water can be fully and uniformly mixed, and then the mixed solution is subjected to vacuum defoaming treatment to remove bubbles in the mixed solution, so that a flat anti-fog and anti-fog coating can be formed in the subsequent coating process.
In some embodiments, the temperature of the air drying treatment is 30 to 90 ℃. In this embodiment, in order to dry the moisture in the anti-fog and anti-fog coating, the temperature needs to be higher than room temperature, the melting point temperature of the formed anti-fog and anti-fog coating is generally 90-110 ℃, the anti-fog and anti-fog coating is melted when the temperature is too high, and the dehydration efficiency is affected when the temperature is too low, so the temperature during air drying is set to be 30-90 ℃.
The invention is further illustrated by the following specific examples:
example 1
(1) Mixing 1 part of glycerol AR 99%, 6 parts of polyvinyl alcohol 205 type and 30 parts of deionized water in parts by weight in a reaction kettle at the temperature of 75 ℃, and defoaming in vacuum to obtain an antifogging adhesive;
(2) the surface of the transparent base material is cleaned to ensure that no dust and moisture remain, a proper amount of defoamed antifogging glue is introduced, and the antifogging glue is coated on the surface of the transparent base material by using an auxiliary tool such as a brush. And after the coating is finished, standing for 60 minutes, and uniformly spreading the antifogging glue on the surface of the transparent substrate by utilizing the fluid characteristic. And then, drying by an infrared dryer, or drying by a blast dryer or a vacuum dryer, and the like, so as to prepare an antifogging and antifogging coating on the transparent substrate.
Example 2
(1) Mixing 2 parts by weight of glycerol AR 99%, 6 parts by weight of polyvinyl alcohol 205 type and 30 parts by weight of deionized water in a reaction kettle at the temperature of 75 ℃, and defoaming in vacuum to obtain an antifogging adhesive;
(2) the method comprises the steps of cleaning the surface of a transparent base material, ensuring that no dust and moisture are left, introducing a proper amount of defoamed antifogging glue, coating the antifogging glue on the surface of the transparent base material by using an auxiliary tool such as a brush, standing for 60 minutes after coating is finished, uniformly spreading the antifogging glue on the surface of the transparent base material by utilizing the fluid characteristic, and drying by using an infrared dryer, namely preparing an antifogging and antifogging coating on the transparent base material.
Example 3
(1) Mixing 1 part of glycerol AR 99%, 6 parts of polyvinyl alcohol 205 type and 50 parts of deionized water in parts by weight in a reaction kettle at the temperature of 75 ℃, and defoaming in vacuum to obtain an antifogging adhesive;
(2) cleaning the surface of the transparent base material to ensure that no dust and moisture remain, pouring a proper amount of defoamed antifogging glue, and uniformly coating the antifogging glue on the surface of the transparent base material by using an auxiliary tool such as a brush; and after the coating is finished, standing for 60 minutes, and uniformly spreading the antifogging glue on the surface of the transparent substrate by utilizing the fluid characteristic. And then drying by an infrared dryer, or drying by a blast dryer or a vacuum dryer, and the like, namely preparing an antifogging and antifogging coating on the transparent base material.
Example 4
(1) Mixing 1 part of glycerol AR 99%, 8 parts of polyvinyl alcohol 205 type and 30 parts of deionized water in parts by weight in a reaction kettle at the temperature of 75 ℃, and defoaming in vacuum to obtain an antifogging adhesive;
(2) the method comprises the steps of cleaning the surface of a transparent base material, ensuring that no dust and moisture remain, introducing a proper amount of defoamed antifogging glue, coating the antifogging glue on the surface of the transparent base material by using an auxiliary tool such as a brush, standing for 60 minutes after coating is finished, uniformly spreading the antifogging glue on the surface of the transparent base material by utilizing the characteristics of a fluid, and drying by using an infrared dryer or by using methods such as hair dryer drying, blast dryer drying or vacuum dryer drying, namely preparing an antifogging and antifogging coating layer on the transparent base material.
Example 5
(1) Mixing 2 parts by weight of glycerol AR 99%, 8 parts by weight of polyvinyl alcohol 205 type and 60 parts by weight of deionized water in a reaction kettle at the temperature of 75 ℃, and defoaming in vacuum to obtain an antifogging adhesive;
(2) the method comprises the steps of cleaning the surface of a transparent base material, ensuring that no dust and moisture remain, introducing a proper amount of defoamed antifogging glue, coating the antifogging glue on the surface of the transparent base material by using an auxiliary tool such as a brush, standing for 60 minutes after coating is finished, uniformly spreading the antifogging glue on the surface of the transparent base material by utilizing the characteristics of a fluid, and drying by using an infrared dryer or by using methods such as hair dryer drying, blast dryer drying or vacuum dryer drying, namely preparing an antifogging and antifogging coating layer on the transparent base material.
Further, the antifogging and antifogging effects of the antifogging and antifogging coating prepared in example 1 were examined, and the results are shown in fig. 2 and 3. Wherein, fig. 2 is a diagram showing the antifogging test effect of the antifogging and antifogging coating prepared in example 1 of the present invention when coated on a culture dish, the left side of fig. 2 is the culture dish without the antifogging and antifogging coating, and the right side is the culture dish coated with the antifogging and antifogging coating. The culture dish that adopts in this application is the polystyrene culture dish, and wherein, the specification of culture dish is: the diameter is 55mm, the height is 10mm, and the thickness of the coated antifogging and antifogging coating is 0.08 mm. The test method comprises the following steps: placing the culture dish without the anti-fog and anti-fog coating and the culture dish coated with the anti-fog and anti-fog coating into a refrigerator at the temperature of minus 20 ℃ for 30min, and then taking out and placing the culture dish 10cm above hot water at the temperature of 100 ℃ for heating treatment for 30 s. The culture dish which is not coated with the antifogging and antifogging coating after the heating treatment and the culture dish coated with the antifogging and antifogging coating are placed under a black background with characters. As is apparent from FIG. 2, after the anti-fog and anti-fog coating prepared by the method is coated on a common culture dish, the anti-fog and anti-fog effects of the culture dish are remarkably improved. Also, in the present application, the same test method was used to obtain the test results shown in FIG. 3 by replacing the substrate with the goggles from the polystyrene petri dish. From fig. 3, it can be seen that the antifogging and antifogging coating prepared by the present application has a remarkable antifogging effect on goggles. Therefore, according to the test result, the anti-fog and anti-fog coating prepared by the method is applied to the goggles, and the problem that the mirror surface is easy to fog and the working efficiency is influenced when medical workers use the goggles can be effectively solved.
Further, the antifogging and antifogging properties of the antifogging and antifogging coating prepared in example 1 were examined in the present application under three different humidity environments. All the test samples were prepared by coating the anti-fog and anti-fog coating prepared in example 1 on a petri dish. Wherein the thickness of the coated antifogging and antifogging layer is 0.08 mm. A. Humidifying by a humidifier: placing the culture dish coated with the anti-fog and anti-fog coating above a humidifier by 10cm, and humidifying the anti-fog and anti-fog coating on the culture dish under the conditions that the humidity is 80% and the temperature is 27.5 ℃; B. humidifying by boiling water vapor: placing the culture dish coated with the anti-fog and anti-fog coating at a position 13cm above the boiling water, and humidifying the anti-fog and anti-fog coating on the culture dish; C. air humidification: the petri dish coated with the anti-fog and anti-fog coating was placed in air with the humidity set at 70% and the temperature set at 27.5 ℃. Under three different humidification environments, the culture dish coated with the anti-fog and anti-fog coating is continuously humidified until the anti-fog and anti-fog coating coated on the culture dish loses the anti-fog and anti-fog effects, and the results are as follows:
as can be seen from the results, the anti-fog and anti-fog coating prepared by the method has good lasting anti-fog and anti-fog effects, and can maintain the anti-fog and anti-fog effects for a long time even under extreme environments.
Furthermore, in the present application, the prepared anti-fog and anti-fog coatings were subjected to water absorption test, and were also tested in three different humidity environments, and all the test samples were prepared by coating the anti-fog and anti-fog coatings prepared in example 1 on a culture dish, wherein the thickness of the coated anti-fog and anti-fog layers was 0.08mm, and the test conditions were as follows: A. humidifying by a humidifier: placing the culture dish coated with the anti-fog and anti-fog coating above a humidifier by 10cm, and humidifying the anti-fog and anti-fog coating on the culture dish under the conditions that the humidity is 80% and the temperature is 27.5 ℃; B. humidifying by boiling water vapor: placing the culture dish coated with the anti-fog and anti-fog coating at a position 13cm above the boiling water, and humidifying the anti-fog and anti-fog coating on the culture dish; C. air humidification: the petri dish coated with the anti-fog and anti-fog coating was placed in air with the humidity set at 70% and the temperature set at 27.5 ℃, and the test results were as follows:
the experimental result shows that the anti-fog and anti-fog coating prepared in the application has better water absorption and water storage performance.
In addition, the light transmittance of the prepared antifogging and antifogging coating is also detected. Fig. 4 is a light transmittance test chart of the anti-fog and anti-fog coating prepared in example 1 of the present invention in the visible light range, and it can be seen from fig. 4 that the anti-fog and anti-fog coating prepared in the present application has a high light transmittance, and the light transmittance can reach 92% in the visible light range.
Further, the anti-adhesion performance of the prepared anti-fog and anti-fog coating is tested, the anti-fog and anti-fog coating coated on the glass substrate is repeatedly torn by the 3M adhesive tape, the tearing frequency is controlled to be 100 times, and the torn anti-fog and anti-fog coating does not fall off from the glass substrate, so that the anti-fog and anti-fog coating prepared by the method has good adhesion performance and can be firmly adhered to the surface of the substrate through a coating process.
In summary, the invention provides an anti-fog and anti-fog coating and a preparation method thereof, the anti-fog glue is prepared by mixing hydrophilic polymer, polyhydric alcohol and deionized water, and then the anti-fog glue is coated on the surface of a transparent substrate and is subjected to air drying treatment to form the anti-fog and anti-fog coating. The hydrophilic polymer network and the polyhydric alcohol in the anti-fog and anti-fog coating prepared by the invention have synergistic effect, so that the prepared anti-fog and anti-fog coating has water absorption and storage performance, excellent anti-fog and anti-fog performance, excellent optical property, high light transmittance and high wear resistance. In addition, the invention has simple preparation process, wide raw material source and low preparation cost, takes the deionized water as the solvent, is safe and nontoxic, and is beneficial to environmental protection.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (2)
1. The preparation method of the antifogging and antifogging coating is characterized by comprising the following steps:
according to the parts by weight, 1-10 parts of polyhydric alcohol with the purity higher than 95%, 6-15 parts of hydrophilic polymer and 30-150 parts of deionized water are mixed in a water bath in a reaction kettle at the temperature of 75-85 ℃, and the mixed solution is subjected to vacuum defoaming treatment to prepare the antifogging adhesive;
coating the antifogging glue on the surface of a transparent base material for air drying treatment to form an antifogging and antifogging coating; the temperature of the air drying treatment is 30-90 ℃;
the polyol is glycerol; the hydrophilic polymer is polyvinyl alcohol.
2. An anti-fog and anti-mist coating, characterized in that it is prepared by the method of claim 1.
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| WO2023096740A1 (en) * | 2021-11-23 | 2023-06-01 | Corning Incorporated | Anti-fog cell culture support |
| CN114196317B (en) * | 2021-12-16 | 2022-11-25 | 新沂肽科生物科技有限公司 | Modified gamma-polyglutamic acid anti-fog coating material and preparation method and application thereof |
| CN114644773B (en) * | 2022-03-28 | 2023-04-07 | 福州大学 | Preparation method of anti-freezing self-cleaning agricultural anti-fog greenhouse film |
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| US6720389B2 (en) * | 2000-09-20 | 2004-04-13 | Nippon Shokubai Co., Ltd. | Water-absorbent resin and production process therefor |
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| CN101037559B (en) * | 2006-03-17 | 2010-05-12 | 中国石油天然气股份有限公司 | Anti-fogging coating composition and preparation method thereof |
| US8053485B2 (en) * | 2007-11-08 | 2011-11-08 | Sika Technology Ag | Polyurethane foam |
| JP5680818B2 (en) * | 2008-08-01 | 2015-03-04 | ダイセルポリマー株式会社 | Antifogging surface treatment agent and antifogging resin sheet |
| CN101781506A (en) * | 2010-02-04 | 2010-07-21 | 复旦大学 | self-cleaning epoxy resin anti-fog coating |
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| CN108585536A (en) * | 2018-05-30 | 2018-09-28 | 深圳大学 | A kind of antifog glass and preparation method thereof |
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