CN115010976A - Super-hydrophobic bionic nano coating for display support frame and preparation method thereof - Google Patents

Super-hydrophobic bionic nano coating for display support frame and preparation method thereof Download PDF

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CN115010976A
CN115010976A CN202210636381.7A CN202210636381A CN115010976A CN 115010976 A CN115010976 A CN 115010976A CN 202210636381 A CN202210636381 A CN 202210636381A CN 115010976 A CN115010976 A CN 115010976A
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hydrophobic
nano
super
preparation
coating
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徐宏俊
唐正勇
李日胜
韩琦
夏勇
程爱祥
陈波
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Taizhou Stronkin Electronic Co Ltd
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Priority to PCT/CN2023/082670 priority patent/WO2023236621A1/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/123—Treatment by wave energy or particle radiation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/06—Coating with compositions not containing macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2300/00—Characterised by the use of unspecified polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of 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 a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2483/04—Polysiloxanes

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Relates to the technical field of display supports, and discloses a preparation method of a super-hydrophobic bionic nano coating, which comprises the following steps: firstly, etching a micro-nano structure on the surface of a hydrophobic base material through an etching process, and then cleaning the surface of the etched hydrophobic base material; then, coating an adhesive layer on the surface of the hydrophobic base material; and finally, spraying the nanoscale hydrophobic coating particles on the adhesive layer, and drying to obtain the super-hydrophobic layer. According to the invention, a periodic micron lattice is etched on the surface of a hydrophobic substrate by using an etching technology, and then the surface of the lattice is covered and wrapped by the sprayed nano-scale hydrophobic coating particles by combining with the adhesive and the nano-scale hydrophobic coating particles, so that the surface of the substrate with a lattice structure is completely adhered to the nano-scale hydrophobic coating particles, and thus the lattice and a super-hydrophobic layer formed on the surface form a micro-nano composite structure, and the surface of the substrate can keep a hydrophobic characteristic for a long time.

Description

Super-hydrophobic bionic nano coating for display support frame and preparation method thereof
Technical Field
The invention relates to the technical field of display supporting frames, in particular to a super-hydrophobic bionic nano coating for a display supporting frame and a preparation method thereof.
Background
The coating is a solid continuous film obtained by coating once, and is coated on a substrate such as metal, fabric, plastic and the like for the purposes of protection, insulation, decoration and the like. The coating material may be in various forms, and the type and state of the coating material is generally determined according to the substrate to be sprayed. The connection strength between the existing super-hydrophobic bionic nano coating and a matrix cannot reach the expectation, and the hydrophobic performance is rapidly reduced after long-term use.
Disclosure of Invention
The invention aims to provide a super-hydrophobic bionic nano coating for a display support frame and a preparation method thereof, and aims to solve the technical problems that the connection strength of the existing super-hydrophobic bionic nano coating and a matrix cannot reach an expected value, and the hydrophobic performance is rapidly reduced after long-term use.
The inventor finds that the conventional hydrophobic base material achieves the purpose of superhydrophobicity by singly etching a micro-nano structure on the surface, is difficult to achieve the expected effect and has high difficulty. Meanwhile, although the existing mode of spraying viscose on the surface of the base material and then combining the hydrophobic coating can solve the strength problem of the hydrophobic coating and the surface of the base material, the existing mode is not ideal, and the hydrophobic effect realized only by the hydrophobic coating is still single and is difficult to persist.
In order to achieve the purpose, the invention provides the following technical scheme:
according to one aspect of the invention, a preparation method of a super-hydrophobic bionic nano coating is provided, which comprises the following steps:
firstly, etching a micro-nano structure on the surface of a hydrophobic base material through an etching process, and then cleaning the surface of the etched hydrophobic base material;
then, coating an adhesive layer on the surface of the hydrophobic base material;
and finally, spraying the nanoscale hydrophobic coating particles on the adhesive layer, and drying to obtain the super-hydrophobic layer.
Wherein the hydrophobic base material is plastic or teflon.
The micro-nano structure is a periodic micro-lattice, and in the final procedure, the micro-lattice is wrapped by nano-scale hydrophobic coating particles;
wherein the micro-nano structure is preferably a 6-9 μm periodic micrometer lattice.
The point structure in the micro-nano structure is cylindrical, rectangular or prismoid.
The nano-scale hydrophobic coating particles comprise one of hydrophobic modified nano-silica, nano-paraffin, hydrophobic modified octadecyl trichlorosilane and PDMS-carbon black;
wherein the particle size of the nano-scale hydrophobic coating particles is 0.01-0.5 μm.
Wherein, after the viscose layer is coated, the drying time is 4-5min, and the drying temperature is 30-35 ℃;
after the nano-scale hydrophobic coating particles are sprayed, the drying time is 5-6h, and the drying temperature is 45-55 ℃.
Wherein, the adhesive layer comprises at least one of epoxy resin glue, polydimethylsiloxane glue, polyurethane glue or silicone glue.
Wherein the contact angle of the surface of the super-hydrophobic layer is 175 +/-5 degrees, and the rolling angle is 1-8 degrees.
According to an aspect of the present invention, there is provided a super-hydrophobic layer obtained by the above-mentioned preparation method.
According to one aspect of the invention, there is provided the use of a superhydrophobic layer on a display support.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, a periodic micron lattice is etched on the surface of a hydrophobic substrate by using an etching technology, and then the surface of the lattice is covered and wrapped by the sprayed nano-scale hydrophobic coating particles by combining with the adhesive and the nano-scale hydrophobic coating particles, so that the surface of the substrate with a lattice structure is completely adhered to the nano-scale hydrophobic coating particles, and thus the lattice and a super-hydrophobic layer formed on the surface form a micro-nano composite structure, and the surface of the substrate can keep a hydrophobic characteristic for a long time.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flow chart of a method for preparing an ultra-hydrophobic layer in an embodiment.
Detailed Description
The endpoints of the ranges and any values disclosed in the present document are not limited to the precise range or value, and these ranges or values should be understood to encompass values close to these ranges or values. For ranges of values, one or more new ranges of values may be obtained by combining the values between the endpoints of each range, the endpoints of each range and the individual values, and the individual values with each other, and these ranges of values should be considered as specifically disclosed in this document.
Referring to fig. 1, fig. 1 is a block diagram illustrating a method for preparing a super-hydrophobic layer according to an embodiment.
In a first embodiment, a method for preparing a super-hydrophobic layer includes the following steps:
step S101, etching a 6-micrometer period micrometer lattice on the surface of the plastic by a laser etching instrument, and cleaning the etched plastic surface;
the laser etching instrument is IBE-A-150 in model, and a 6-micron periodic honeycomb-type distributed circular-like lattice structure mask plate is adopted during etching, so that a dot structure obtained after etching is cylindrical.
Step S102, coating polydimethylsiloxane adhesive on the surface of the hydrophobic base material, wherein after coating is finished, the drying time is 4.5min, and the drying temperature is 33 ℃;
step S103, spraying the hydrophobic modified nano silicon dioxide with the particle size of 0.25 mu m onto a polydimethylsiloxane adhesive layer, and obtaining the super-hydrophobic layer with the surface contact angle of 178 +/-1 degrees and the rolling angle of 1-3 degrees under the conditions that the drying time is 5.5 hours and the drying temperature is 50 ℃.
Etching a periodic micron lattice on the surface of a hydrophobic substrate by using an etching technology, and combining with viscose and nano-scale hydrophobic coating particles to cover and wrap the surface of the lattice by the sprayed nano-scale hydrophobic coating particles so that the surface of the substrate with a lattice structure is completely sticky with the nano-scale hydrophobic coating particles, and the lattice and a super-hydrophobic layer formed on the surface form a micro-nano composite structure, so that the surface of the substrate can keep a hydrophobic characteristic for a long time
In order to further understand the technical solution of the present invention, the following examples are further illustrated.
Examples two to four:
according to the preparation method of the first embodiment, the difference is that the period of the micro-lattice is different, wherein comparative example 1 is a super-hydrophobic coating without a micro-nano structure, comparative example 2 is a micro-nano structure with a period of 6 μm, and comparative example 3 is a micro-nano structure with a period of 9 μm, which is specifically shown in table 1:
period of micrometer lattice Surface contact angle Angle of surface roll
Example one 6μm 178°±1 1-3°
Example two 7μm 176°±1 2-5°
EXAMPLE III 8μm 174°±1 4-6°
Example four 9μm 171°±1 5-8°
Comparative example 1 Is free of 160°±1 4-7°
Comparative example No. two 6μm 157°±1 5-8°
Comparative example No. three 9μm 155°±1 6-8°
As can be seen from table 1, the other conditions are unchanged, the micron lattice with the period of 6 μm has the best performance of the hydrophobic property, and in addition, the performance of the hydrophobic property is not as good as that of the combination of the micro-nano structure and the super-hydrophobic coating under the conditions of only the micro-nano structure and only the super-hydrophobic coating.
Examples five to six:
following the preparation of example one, except for the difference in dot structure, see table 2:
dot structure Surface contact angle Angle of surface roll
Example one Cylindrical shape 178°±1 1-3°
EXAMPLE five Rectangular shape 177°±1 1-4°
EXAMPLE six Pyramid shape 177°±1 2-4°
As can be seen from table 1, the hydrophobic property is most excellent when the dot structure is cylindrical, although the other conditions are not changed.
Examples seven to nine:
according to the preparation method of the embodiment one, the difference is that the material of the adhesive layer is different, and the specific structure is shown in table 3:
Figure BDA0003680455340000041
Figure BDA0003680455340000051
the detection method comprises the following steps: and (3) cutting 10 knives horizontally and vertically on the dried super-hydrophobic layer every 1mm by using a blade, then sticking the super-hydrophobic layer by using an adhesive tape, tightly pressing the super-hydrophobic layer, immediately tearing the super-hydrophobic layer by using a hand-held tensiometer, observing the falling condition of the prepared super-hydrophobic layer, and measuring and reading the super-hydrophobic layer.
Under the condition that other conditions are not changed, the adhesive layers made of the materials fall off, and the measured tensile force is the largest when the polydimethylsiloxane adhesive is adopted.
Examples ten-eleven:
following the procedure of example one, except that the nanoscale hydrophobic coating particles have different particle sizes, see in particular table 4:
particle size Surface contact angle Angle of surface roll
Example one 0.25μm 178°±1 1-3°
Example ten 0.02μm 177°±1 2-3°
EXAMPLE eleven 0.48μm 177°±1 1-4°
As can be seen from Table 4, nanoscale hydrophobic coating particles having a particle size of 0.25 microns were used, with other conditions being unchanged. The hydrophobic properties are best.
According to an aspect of the present invention, there is provided a super-hydrophobic layer obtained by the above-mentioned preparation method.
According to one aspect of the invention, there is provided the use of a superhydrophobic layer on a display support.
It should be noted that, the nanoscale hydrophobic coating particles described herein are not limited to the hydrophobic modified nanosilica, the nano paraffin, the hydrophobic modified octadecyl trichlorosilane and the PDMS-carbon black, and any known materials, such as polyethylene wax, stearic acid, palmitic acid, glyceryl stearate, hexacosanic acid, tetracosanic acid, triacontanoic acid, octacosane, myristic acid, behenic acid and behenic acid, may be used, and although all materials that can be used as the nanoscale hydrophobic coating particles are not explicitly described herein, it should be understood that the present document covers the preparation method that those skilled in the art can realize.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the general inventive concept. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A preparation method of a super-hydrophobic bionic nano coating is characterized by comprising the following steps:
firstly, etching a micro-nano structure on the surface of a hydrophobic base material through an etching process, and then cleaning the surface of the etched hydrophobic base material;
then, coating an adhesive layer on the surface of the hydrophobic base material;
and finally, spraying the nanoscale hydrophobic coating particles on the adhesive layer, and drying to obtain the super-hydrophobic layer.
2. The preparation method of the super-hydrophobic bionic nano-coating according to claim 1, characterized in that:
the hydrophobic base material is plastic or teflon.
3. The preparation method of the super-hydrophobic bionic nano-coating according to claim 1, characterized in that:
the micro-nano structure is a periodic micro-lattice, and in the final procedure, the micro-lattice is wrapped by nano-scale hydrophobic coating particles;
wherein the micro-nano structure is preferably a 6-9 μm periodic micrometer lattice.
4. The preparation method of the super-hydrophobic bionic nano-coating according to claim 3, characterized in that:
the point structure in the micro-nano structure is cylindrical, rectangular or prismoid.
5. The preparation method of the super-hydrophobic bionic nano-coating according to claim 1, characterized in that:
the nano-scale hydrophobic coating particles comprise one of hydrophobic modified nano-silica, nano-paraffin, hydrophobic modified octadecyl trichlorosilane and PDMS-carbon black;
wherein the particle size of the nano-scale hydrophobic coating particles is 0.01-0.5 μm.
6. The preparation method of the super-hydrophobic bionic nano-coating according to claim 1, characterized in that:
after the adhesive layer is coated, the drying time is 4-5min, and the drying temperature is 30-35 ℃;
after the nano-scale hydrophobic coating particles are sprayed, the drying time is 5-6h, and the drying temperature is 45-55 ℃.
7. The preparation method of the super-hydrophobic bionic nano-coating according to claim 1 or 6, characterized in that:
the adhesive layer comprises at least one of epoxy resin glue, polydimethylsiloxane glue, polyurethane glue and silicone glue.
8. The preparation method of the super-hydrophobic bionic nano-coating according to claim 1, characterized in that:
the contact angle of the surface of the super-hydrophobic layer is 175 +/-5 degrees, and the rolling angle is 1-8 degrees.
9. An ultra-hydrophobic layer obtained by the preparation method according to any one of claims 1 to 8.
10. Use of the superhydrophobic layer of claim 9 on a display support.
CN202210636381.7A 2022-06-07 2022-06-07 Super-hydrophobic bionic nano coating for display support frame and preparation method thereof Pending CN115010976A (en)

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CN115477277A (en) * 2022-09-20 2022-12-16 合肥芯能相变新材料科技有限公司 Renewable super-hydrophobic interface material preparation device
CN116814134A (en) * 2023-05-19 2023-09-29 泰州市创新电子有限公司 Super-hydrophobic bionic nano coating for display support frame and preparation method thereof
WO2023236621A1 (en) * 2022-06-07 2023-12-14 泰州市创新电子有限公司 Super-hydrophobic bionic nano-coating for display support frame and preparation method therefor

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WO2023236621A1 (en) * 2022-06-07 2023-12-14 泰州市创新电子有限公司 Super-hydrophobic bionic nano-coating for display support frame and preparation method therefor
CN115477277A (en) * 2022-09-20 2022-12-16 合肥芯能相变新材料科技有限公司 Renewable super-hydrophobic interface material preparation device
CN115477277B (en) * 2022-09-20 2024-06-11 合肥芯能相变新材料科技有限公司 Renewable super-hydrophobic interface material preparation device
CN116814134A (en) * 2023-05-19 2023-09-29 泰州市创新电子有限公司 Super-hydrophobic bionic nano coating for display support frame and preparation method thereof

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Application publication date: 20220906