CN112724853A - High-temperature-resistant self-cleaning polyester film adhesive tape and preparation method thereof - Google Patents
High-temperature-resistant self-cleaning polyester film adhesive tape and preparation method thereof Download PDFInfo
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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- 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
- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
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- 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
- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C09D7/63—Additives non-macromolecular organic
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- 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
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- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J2479/00—Presence of polyamine or polyimide
- C09J2479/08—Presence of polyamine or polyimide polyimide
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Abstract
The invention discloses a high-temperature-resistant self-cleaning type polyester film adhesive tape, which comprises a polyester film substrate, wherein a wear-resistant coating and a self-cleaning coating are sequentially arranged on the upper surface of the polyester film substrate; the lower surface of the polyester film substrate is sequentially provided with a high-temperature-resistant adhesive layer and a release layer; the wear-resistant coating comprises a first nano filler modified polyacrylate emulsion, a surfactant and deionized water; the first nano filler is halloysite nanotube/nano zirconium dioxide/fluorine-doped reduced graphene oxide; the self-cleaning coating comprises a second nano filler modified polyurethane emulsion, a surfactant and deionized water; the second nano filler is nano titanium dioxide; the high-temperature-resistant adhesive layer comprises an epoxy resin adhesive modified by boron nitride nanosheets. The invention also provides a preparation method of the polyester film adhesive tape. The adhesive tape has excellent high-temperature resistance, good self-cleaning performance and simple preparation method.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a high-temperature-resistant self-cleaning type polyester film adhesive tape and a preparation method thereof.
Background
The Polyester (PET) film is a high molecular plastic film prepared by using polyethylene glycol terephthalate as a raw material, preparing a thick sheet by an extrusion method and performing biaxial tension. The film has excellent mechanical performance, high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature resistance, low temperature resistance, chemical resistance, oil resistance, air tightness and fragrance retention, and can be widely applied to the fields of diffusion sheets, brightening sheet base films, magnetic recording, photosensitive materials, electronics, industrial films and the like in liquid crystal display backlight modules, so that the market demand is great.
The polyester adhesive tape is formed by combining a polyester film serving as a base material with a release layer through an adhesive. The current research direction for adhesive tapes is mainly directed to the functionalization of adhesive tapes. Patent CN201711366649.5 provides an anticorrosive insulating tape of ultraviolet resistance, include that top-down is ultraviolet absorption layer, base cloth layer, viscose layer, anticorrosive coating in proper order, the ultraviolet resistance layer is the ultraviolet resistance absorbent, the base cloth layer is the polyester fiber cloth layer, the viscose layer is polyurethane rubber and silicone rubber mixed glue layer, the anticorrosive coating is the polypropylene fiber layer, polyurethane rubber accounts for 22-32% of anticorrosive insulating tape of ultraviolet resistance main part weight, silicone rubber accounts for 12-20% of anticorrosive insulating tape of ultraviolet resistance main part weight, bond as an organic wholely through the viscose between polyester fiber cloth layer and the anticorrosive coating. The adhesive tape is simple in structure, adopts an upper and lower composite structure, effectively enhances the ultraviolet resistance function, improves the corrosion resistance of the adhesive tape, and has the characteristics of high adhesiveness, oxidation resistance, high stability and the like. Patent CN201610404589.0 provides a matte shading polyester film single-sided adhesive tape and a preparation method thereof, which belong to the technical field of matte shading materials, and improve the shading effect, surface solvent resistance, fingerprint resistance, scratch resistance and high and low temperature resistance of a product by improving the thickness of a polyester film, the fineness and the formula of ink, increasing the printing times of the product, and increasing the formula of a functional coating and special treatment of the gluing surface of the polyester film. With the rapid development of the electronic market gradually towards the ultrathin and portable directions, the existing shading polyester film single-sided adhesive tape in the market is difficult to simultaneously have: ultra-thin, good shading performance, solvent resistance, fingerprint resistance, scratch resistance and high and low temperature resistance. As can be seen from the above prior art, the functional treatment of the adhesive tape is mainly to prepare a functional coating on a substrate, but the bonding property of the coating and the substrate is the key to prepare a functional adhesive tape with excellent performance.
Disclosure of Invention
One of the technical problems to be solved by the invention is as follows: the high-temperature-resistant self-cleaning polyester film adhesive tape is excellent in high-temperature resistance and good in self-cleaning performance.
The second technical problem to be solved by the invention is as follows: the preparation method of the high-temperature-resistant self-cleaning polyester film is mild in process conditions, simple to operate and good in stability of the prepared adhesive tape.
In order to solve the first technical problem, the technical scheme of the invention is as follows:
a high-temperature-resistant self-cleaning type polyester film adhesive tape comprises a polyester film substrate, wherein a wear-resistant coating and a self-cleaning coating are sequentially arranged on the upper surface of the polyester film substrate; the lower surface of the polyester film substrate is sequentially provided with a high-temperature-resistant adhesive layer and a release layer; the thicknesses of the polyester film substrate, the wear-resistant coating, the self-cleaning coating, the high-temperature-resistant adhesive layer and the release layer are respectively 30-40 microns, 2-5 microns, 10-15 microns and 20-30 microns; the wear-resistant coating comprises a first nano filler modified polyacrylate emulsion, a surfactant and deionized water; the first nano filler is halloysite nanotube/nano silicon dioxide/fluorine-doped reduced graphene oxide; the self-cleaning coating comprises a second nano filler modified polyacrylate emulsion, a surfactant and deionized water; the second nano filler is nano titanium dioxide; the high-temperature-resistant adhesive layer polyimide adhesive is characterized by comprising polyimide adhesive.
Preferably, the wear-resistant coating comprises, by weight, 40-60 parts of a first nanofiller-modified polyacrylate emulsion, 1-2 parts of a surfactant and 50-80 parts of deionized water.
Preferably, the self-cleaning coating comprises 30-50 parts by weight of second nanofiller-modified polyurethane emulsion, 2-3 parts by weight of surfactant and 60-80 parts by weight of deionized water. The surfactant may preferably be a silane coupling agent.
In order to solve the second technical problem, the technical solution of the present invention is:
a preparation method of a high-temperature-resistant self-cleaning type polyester film adhesive tape comprises the following steps:
(1) placing reduced graphene oxide powder in an autoclave containing fluorine gas and nitrogen gas, and treating for 10-20h at 100 ℃ to obtain fluorinated reduced graphene oxide nanosheets;
(2) dispersing halloysite nanotubes and the prepared fluorinated reduced graphene oxide nanosheets into a mixed solvent of deionized water and absolute ethyl alcohol, dropwise adding acetic acid, stirring and mixing uniformly, then adding tetraethoxysilane, stirring and hydrolyzing for 2-3h, then aging, and finally placing in a reaction kettle for reaction to prepare a first nano filler;
(3) mixing and stirring the acrylate monomer, the prepared first nano filler, sodium dodecyl sulfate and deionized water uniformly, then heating to 80-90 ℃, dropwise adding potassium persulfate, and reacting for 2-4 hours to prepare a first nano filler modified polyacrylate emulsion; mixing the prepared polyacrylate emulsion modified by the first nano filler, a surface dispersant and deionized water to prepare first coating slurry;
(4) mixing and stirring acrylate monomers, nano titanium dioxide, sodium dodecyl sulfate and deionized water uniformly, then heating to 80-90 ℃, dropwise adding potassium persulfate, and reacting for 2-4h to prepare a second nano filler modified polyacrylate emulsion; mixing the second nano filler modified polyacrylate emulsion, a surface dispersant and deionized water to prepare second coating slurry;
(5) cleaning the polyester film substrate, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating and a self-cleaning coating; and coating polyimide glue on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue and the release layer to obtain the polyester film adhesive tape.
Preferably, in the step (1), the volume ratio of the fluorine gas to the nitrogen gas is (6-8): 2; the fluorinated reduced graphene oxide nanosheet has a molar ratio of fluorine to carbon of (0.4-0.5): 1.
preferably, in step (2), the usage ratio of the halloysite nanotubes, the fluorinated reduced graphene oxide nanosheets, acetic acid, ethyl orthosilicate, deionized water and absolute ethyl alcohol is (0.05-0.1) g: (0.2-0.3) g: (1-2) ml: 5 ml: 5 ml: 35 ml.
Preferably, in the step (2), the activation treatment is carried out at 40 ℃ for 2 hours.
Preferably, in the step (2), the reaction is carried out at 180 ℃ for 20-25 h.
Preferably, in the step (3), the mass ratio of the acrylate monomer, the first nanofiller, the sodium dodecyl sulfate, the potassium persulfate and the deionized water is (30-50): (1-3): (0.01-0.02): (0.02-0.05): 50.
preferably, in the step (4), the mass ratio of the acrylate monomer, the nano titanium dioxide, the sodium dodecyl sulfate, the potassium persulfate and the deionized water is (30-50): (1-2): (0.01-0.02): (0.02-0.05): 50.
due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention provides a high-temperature-resistant self-cleaning type polyester film adhesive tape which comprises a polyester film substrate, wherein a wear-resistant coating and a self-cleaning coating are sequentially arranged on the upper surface of the polyester film substrate; the wear-resistant coating comprises a first nano filler modified polyacrylate emulsion, a surfactant and deionized water; the first nano filler is halloysite nanotubes/nano silicon dioxide/fluorine-doped reduced graphene oxide, and the halloysite nanotubes and nano silicon dioxide particles are respectively attached to the surface of the fluorinated reduced graphene oxide nanosheet, so that on one hand, the dispersibility of the reduced graphene oxide is improved, on the other hand, the thermal decomposition of the fluorinated reduced graphene oxide can be effectively prevented, and the thermal stability of the material is improved. In the friction process, the halloysite nanotube, the nano-silica and the reduced graphene oxide nanosheet are cooperated with one another to form a protective film, so that the wear resistance of the matrix is improved. The self-cleaning coating provided by the invention is modified by titanium dioxide, and can generate electron transition under the illumination condition to generate electron and hole pairs, so that nearby organic matters are captured to be degraded, and the aim of self-cleaning is fulfilled.
The first coating slurry and the second coating slurry are prepared by an in-situ polymerization method, the dispersibility is good, the bonding performance with a matrix is good, the prepared adhesive tape is good in stability and excellent in high-temperature resistance, and the preparation method is simple and low in cost.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
The following raw materials have the following performance parameters:
halloysite nanotubes: purchased from zhengzhou jinggangjie ceramics ltd.
Reducing graphene oxide: the diameter is 1-2 μm and the thickness is 100-200 μm.
Nano titanium dioxide: anatase type, with an average particle size of 20-30 nm.
Polyester film: available from the mass-linked electronics materials, Inc. of Dongguan.
Example 1
(1) Placing reduced graphene oxide powder in a reactor containing fluorine gas and nitrogen gas in a volume ratio of 6: 2, treating the mixed gas in an autoclave at 100 ℃ for 10 hours to prepare fluorinated reduced graphene oxide nanosheets; the molar ratio of fluorine to carbon is controlled to be 0.4: 1;
(2) dispersing 0.05g of halloysite nanotube and 0.2g of the prepared fluorinated reduced graphene oxide nanosheet in a mixed solvent of 5ml of deionized water and 35ml of absolute ethyl alcohol, dropwise adding 1ml of acetic acid, stirring and mixing uniformly, then adding 5ml of ethyl orthosilicate, stirring and hydrolyzing for 2h, then aging at 40 ℃ for 2h, and finally placing in a reaction kettle for reacting at 180 ℃ for 20h to prepare a first nano filler;
(3) mixing 30g of acrylate, 1g of the prepared first nano filler, 0.01g of sodium dodecyl sulfate and 50g of deionized water, uniformly stirring, heating to 80 ℃, dropwise adding 0.02g of potassium persulfate, and reacting for 2 hours to obtain a first nano filler modified polyacrylate emulsion; mixing 40 parts by weight of the prepared first nano filler modified polyacrylate emulsion, 1 part by weight of silane coupling agent and 50 parts by weight of deionized water to prepare first coating slurry;
(4) mixing 30g of acrylate, 1g of nano titanium dioxide, 0.01g of sodium dodecyl sulfate and 50g of deionized water, uniformly stirring, heating to 80 ℃, dropwise adding 0.02g of potassium persulfate, and reacting for 2 hours to obtain a second nano filler modified polyacrylate emulsion; mixing 30 parts by weight of second nano filler modified polyacrylate emulsion, 2 parts by weight of silane coupling agent and 60 parts by weight of deionized water to prepare second coating slurry;
(5) cleaning a polyester film substrate with the thickness of 30 microns, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating with the thickness of 2 microns and a self-cleaning coating with the thickness of 2 microns; and coating a polyimide glue coating with the thickness of 10 mu m on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue coating and a release layer with the thickness of 20 mu m to obtain the high-temperature-resistant self-cleaning polyester film adhesive tape.
Example 2
(1) Placing reduced graphene oxide powder in a reactor containing fluorine gas and nitrogen gas in a volume ratio of 8: 2, treating the mixed gas in an autoclave at 100 ℃ for 20 hours to prepare fluorinated reduced graphene oxide nanosheets; the molar ratio of fluorine to carbon is controlled to be 0.5: 1;
(2) dispersing 0.1g of halloysite nanotube and 0.3g of the prepared fluorinated reduced graphene oxide nanosheet in a mixed solvent of 5ml of deionized water and 35ml of absolute ethyl alcohol, dropwise adding 2ml of acetic acid, stirring and mixing uniformly, then adding 5ml of ethyl orthosilicate, stirring and hydrolyzing for 3h, then aging for 2h at 40 ℃, and finally placing in a reaction kettle for reacting for 25h at 180 ℃ to prepare a first nanofiller;
(3) mixing and stirring uniformly 50g of acrylate, 3g of the prepared first nano filler, 0.02g of sodium dodecyl sulfate and 50g of deionized water, then heating to 90 ℃, dropwise adding 0.05g of potassium persulfate, and reacting for 4 hours to prepare a first nano filler modified polyacrylate emulsion; mixing 60 parts by weight of the prepared first nano filler modified polyacrylate emulsion, 2 parts by weight of silane coupling agent and 80 parts by weight of deionized water to prepare first coating slurry;
(4) mixing and stirring uniformly 50g of acrylate, 2g of nano titanium dioxide, 0.02g of sodium dodecyl sulfate and 50g of deionized water, heating to 90 ℃, dropwise adding 0.05g of potassium persulfate, and reacting for 4 hours to obtain a second nano filler modified polyacrylate emulsion; mixing 50 parts by weight of second nano filler modified polyacrylate emulsion, 3 parts by weight of silane coupling agent and 80 parts by weight of deionized water to prepare second coating slurry;
(5) cleaning a polyester film substrate with the thickness of 40 mu m, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating with the thickness of 5 mu m and a self-cleaning coating with the thickness of 5 mu m; and coating a polyimide glue coating with the thickness of 15 microns on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue coating and a release layer with the thickness of 30 microns to obtain the high-temperature-resistant self-cleaning polyester film adhesive tape.
Example 3
(1) Placing reduced graphene oxide powder in a reactor containing fluorine gas and nitrogen gas in a volume ratio of 7: 2, treating the mixed gas in an autoclave at 100 ℃ for 15 hours to prepare fluorinated reduced graphene oxide nanosheets; the molar ratio of fluorine to carbon is controlled to be 0.4: 1;
(2) dispersing 0.06g of halloysite nanotube and 0.25g of the prepared fluorinated reduced graphene oxide nanosheet in a mixed solvent of 5ml of deionized water and 35ml of absolute ethyl alcohol, dropwise adding 1.5ml of acetic acid, stirring and mixing uniformly, then adding 5ml of ethyl orthosilicate, stirring and hydrolyzing for 2.5h, then aging for 2h at 40 ℃, and finally placing in a reaction kettle for reacting for 21h at 180 ℃ to prepare a first nanofiller;
(3) mixing 35g of acrylate, 1.5g of the prepared first nano filler, 0.015g of sodium dodecyl sulfate and 50g of deionized water, uniformly stirring, heating to 85 ℃, dropwise adding 0.03g of potassium persulfate, and reacting for 3 hours to obtain a first nano filler modified polyacrylate emulsion; mixing 50 parts by weight of the prepared first nano filler modified polyacrylate emulsion, 1.5 parts by weight of silane coupling agent and 60 parts by weight of deionized water to prepare first coating slurry;
(4) mixing and stirring uniformly 40g of acrylate, 1.5g of nano titanium dioxide, 0.015g of sodium dodecyl sulfate and 50g of deionized water, heating to 85 ℃, dropwise adding 0.03g of potassium persulfate, and reacting for 3 hours to obtain a second nano filler modified polyacrylate emulsion; mixing 40 parts by weight of second nano filler modified polyacrylate emulsion, 2.5 parts by weight of silane coupling agent and 70 parts by weight of deionized water to prepare second coating slurry;
(5) cleaning a polyester film substrate with the thickness of 30 microns, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating with the thickness of 3 microns and a self-cleaning coating with the thickness of 3 microns; and coating a polyimide glue coating with the thickness of 12 microns on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue coating and a release layer with the thickness of 25 microns to obtain the high-temperature-resistant self-cleaning polyester film adhesive tape.
Example 4
(1) Placing reduced graphene oxide powder in a reactor containing fluorine gas and nitrogen gas in a volume ratio of 6: 2, treating the mixed gas in an autoclave at 100 ℃ for 20 hours to prepare fluorinated reduced graphene oxide nanosheets; the molar ratio of fluorine to carbon is controlled to be 0.4: 1;
(2) dispersing 0.07g of halloysite nanotube and 0.2g of the prepared fluorinated reduced graphene oxide nanosheet in a mixed solvent of 5ml of deionized water and 35ml of absolute ethyl alcohol, dropwise adding 2ml of acetic acid, stirring and mixing uniformly, then adding 5ml of ethyl orthosilicate, stirring and hydrolyzing for 2h, then aging at 40 ℃ for 2h, and finally placing in a reaction kettle for reacting at 180 ℃ for 25h to prepare a first nanofiller;
(3) mixing and stirring 40g of acrylate, 3g of the prepared first nano filler, 0.01g of sodium dodecyl sulfate and 50g of deionized water uniformly, then heating to 80 ℃, dropwise adding 0.05g of potassium persulfate, and reacting for 4 hours to prepare a first nano filler modified polyacrylate emulsion; mixing 40 parts by weight of the prepared first nano filler modified polyacrylate emulsion, 1 part by weight of silane coupling agent and 80 parts by weight of deionized water to prepare first coating slurry;
(4) mixing and stirring 30g of acrylate, 2g of nano titanium dioxide, 0.01g of sodium dodecyl sulfate and 50g of deionized water uniformly, heating to 90 ℃, dropwise adding 0.02g of potassium persulfate, and reacting for 4 hours to obtain a second nano filler modified polyacrylate emulsion; mixing 30 parts by weight of second nano filler modified polyacrylate emulsion, 3 parts by weight of silane coupling agent and 60 parts by weight of deionized water to prepare second coating slurry;
(5) cleaning a polyester film substrate with the thickness of 40 mu m, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating with the thickness of 2 mu m and a self-cleaning coating with the thickness of 3 mu m; and coating a polyimide glue coating with the thickness of 15 microns on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue coating and a release layer with the thickness of 20-30 microns to obtain the high-temperature-resistant self-cleaning polyester film adhesive tape.
Example 5
(1) Placing reduced graphene oxide powder in a reactor containing fluorine gas and nitrogen gas in a volume ratio of 7: 2, treating the mixed gas in an autoclave at 100 ℃ for 15 hours to prepare fluorinated reduced graphene oxide nanosheets; the molar ratio of fluorine to carbon is controlled to be 0.4: 1;
(2) dispersing 0.1g of halloysite nanotube and 0.2g of the prepared fluorinated reduced graphene oxide nanosheet in a mixed solvent of 5ml of deionized water and 35ml of absolute ethyl alcohol, dropwise adding 1ml of acetic acid, stirring and mixing uniformly, then adding 5ml of ethyl orthosilicate, stirring and hydrolyzing for 3h, then aging at 40 ℃ for 2h, and finally placing in a reaction kettle for reacting at 180 ℃ for 20h to prepare a first nano filler;
(3) mixing and stirring uniformly 40g of acrylate, 2g of the prepared first nano filler, 0.02g of sodium dodecyl sulfate and 50g of deionized water, then heating to 80 ℃, dropwise adding 0.05g of potassium persulfate, and reacting for 2 hours to prepare a first nano filler modified polyacrylate emulsion; mixing 50 parts by weight of the prepared first nano filler modified polyacrylate emulsion, 1 part by weight of silane coupling agent and 70 parts by weight of deionized water to prepare first coating slurry;
(4) mixing and stirring uniformly 45g of acrylate, 1g of nano titanium dioxide, 0.01g of sodium dodecyl sulfate and 50g of deionized water, heating to 80 ℃, dropwise adding 0.05g of potassium persulfate, and reacting for 3 hours to obtain a second nano filler modified polyacrylate emulsion; mixing 30 parts by weight of second nano filler modified polyacrylate emulsion, 3 parts by weight of silane coupling agent and 60 parts by weight of deionized water to prepare second coating slurry;
(5) cleaning a polyester film substrate with the thickness of 30 microns, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating with the thickness of 4 microns and a self-cleaning coating with the thickness of 4 microns; and coating a polyimide glue coating with the thickness of 12 microns on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue coating and a release layer with the thickness of 20 microns to obtain the high-temperature-resistant self-cleaning polyester film adhesive tape.
Comparative example 1
No halloysite nanotubes were added to the wear resistant coating, and the other conditions were the same as in example 5.
Comparative example 2
The abrasion resistant coating is not added with halloysite nanotubes and nano-silica, and other conditions are the same as example 5.
The tapes of the above examples and comparative examples were tested for abrasion resistance according to the method of ISO6722, the tapes being adhered in a single layer in the longitudinal direction to a metal mandrel having a diameter of 10 mm; a scraping movement was carried out on the adhesive tape under a weight load of 7N. The scratchers used were steel wires according to ISO8458-2, with a diameter of 0.45 mm. The abrasion resistance parameter is the number of scratches until short-circuiting. Other properties were measured according to the ASTM D standard for surfaces, and the results are shown in Table 1.
TABLE 1
The test results show that the adhesive tape provided by the invention has better mechanical property, adhesive property and high temperature resistance.
Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A high temperature resistant self-cleaning type polyester film adhesive tape is characterized in that: the coating comprises a polyester film substrate, wherein a wear-resistant coating and a self-cleaning coating are sequentially arranged on the upper surface of the polyester film substrate; the lower surface of the polyester film substrate is sequentially provided with a high-temperature-resistant adhesive layer and a release layer; the thicknesses of the polyester film substrate, the wear-resistant coating, the self-cleaning coating, the high-temperature-resistant adhesive layer and the release layer are respectively 30-40 microns, 2-5 microns, 10-15 microns and 20-30 microns; the wear-resistant coating comprises a first nano filler modified polyacrylate emulsion, a surfactant and deionized water; the first nano filler is halloysite nanotube/nano zirconium dioxide/fluorine-doped reduced graphene oxide; the self-cleaning coating comprises a second nano filler modified polyurethane emulsion, a surfactant and deionized water; the second nano filler is nano titanium dioxide; the high-temperature-resistant adhesive layer comprises an epoxy resin adhesive modified by boron nitride nanosheets.
2. The high temperature resistant self-cleaning mylar tape as recited in claim 1, wherein: the wear-resistant coating comprises, by weight, 40-60 parts of a first nano filler modified polyacrylate emulsion, 1-2 parts of a surfactant and 50-80 parts of deionized water.
3. The high temperature resistant self-cleaning mylar tape as recited in claim 1, wherein: the self-cleaning coating comprises, by weight, 30-50 parts of second nano filler modified polyurethane emulsion, 2-3 parts of surfactant and 60-80 parts of deionized water.
4. The method for preparing the high-temperature-resistant self-cleaning type polyester film adhesive tape according to any one of claims 1 to 3, which is characterized by comprising the following steps:
(1) placing reduced graphene oxide powder in an autoclave containing fluorine gas and nitrogen gas, and treating for 10-20h at 100 ℃ to obtain fluorinated reduced graphene oxide nanosheets;
(2) dispersing halloysite nanotubes and the prepared fluorinated reduced graphene oxide nanosheets into a mixed solvent of deionized water and absolute ethyl alcohol, dropwise adding acetic acid, stirring and mixing uniformly, then adding tetraethoxysilane, stirring and hydrolyzing for 2-3h, then aging, and finally placing in a reaction kettle for reaction to prepare a first nano filler;
(3) mixing and stirring the acrylate monomer, the prepared first nano filler, sodium dodecyl sulfate and deionized water uniformly, then heating to 80-90 ℃, dropwise adding potassium persulfate, and reacting for 2-4 hours to prepare a first nano filler modified polyacrylate emulsion; mixing the prepared polyacrylate emulsion modified by the first nano filler, a surface dispersant and deionized water to prepare first coating slurry;
(4) mixing and stirring acrylate monomers, nano titanium dioxide, sodium dodecyl sulfate and deionized water uniformly, then heating to 80-90 ℃, dropwise adding potassium persulfate, and reacting for 2-4h to prepare a second nano filler modified polyacrylate emulsion; mixing the second nano filler modified polyacrylate emulsion, a surface dispersant and deionized water to prepare second coating slurry;
(5) cleaning the polyester film substrate, coating first coating slurry on the upper surface of the polyester film substrate, drying, coating second coating slurry, and continuously drying to obtain a wear-resistant coating and a self-cleaning coating; and coating polyimide glue on the lower surface of the polyester film substrate, and then pressing and molding the polyimide glue and the release layer to obtain the polyester film adhesive tape.
5. The preparation method of the high-temperature-resistant self-cleaning type polyester film adhesive tape according to claim 4, wherein the preparation method comprises the following steps: in the step (1), the volume ratio of the fluorine gas to the nitrogen gas is (6-8): 2; the molar ratio of fluorine to carbon in the fluorinated reduced graphene oxide nanosheet is (0.4-0.5).
6. The preparation method of the high-temperature-resistant self-cleaning type polyester film adhesive tape according to claim 4, wherein the preparation method comprises the following steps: in the step (2), the using amount ratio of the halloysite nanotube, the fluorinated reduced graphene oxide nanosheet, acetic acid, ethyl orthosilicate, deionized water and absolute ethyl alcohol is (0.05-0.1) g: (0.2-0.3) g: (1-2) ml: 5 ml: 5 ml: 35 ml.
7. The preparation method of the high-temperature-resistant self-cleaning type polyester film adhesive tape according to claim 4, wherein the preparation method comprises the following steps: in the step (2), the activating treatment is carried out for 2 hours at 40 ℃.
8. The preparation method of the high-temperature-resistant self-cleaning type polyester film adhesive tape according to claim 4, wherein the preparation method comprises the following steps: in the step (2), the reaction condition is that the treatment is carried out for 20-25h at 180 ℃.
9. The preparation method of the high-temperature-resistant self-cleaning type polyester film adhesive tape according to claim 4, wherein the preparation method comprises the following steps: in the step (3), the mass ratio of the acrylate monomer, the first nano filler, the sodium dodecyl sulfate, the potassium persulfate and the deionized water is (30-50): (1-3): (0.01-0.02): (0.02-0.05): 50.
10. the preparation method of the high-temperature-resistant self-cleaning type polyester film adhesive tape according to claim 4, wherein the preparation method comprises the following steps: preferably, in the step (4), the mass ratio of the acrylate monomer, the nano titanium dioxide, the sodium dodecyl sulfate, the potassium persulfate and the deionized water is (30-50): (1-2): (0.01-0.02): (0.02-0.05): 50.
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