Weather-resistant conductive adhesion-reducing tape and method of making same

Abstract

The present application belongs to the technical field of adhesives, and particularly relates to a weather-resistant power-on adhesion-reducing adhesive tape and a preparation method thereof. The weather-resistant power-on adhesion-reducing adhesive tape is prepared by taking bio-based isocyanate and D-sorbitol as raw materials to prepare bio-based polyurethane acrylate, combining with degraded peach gum and rosin to obtain bio-based adhesion-reducing material, and then adding power-on luminescent material for coating and forming. The weather-resistant power-on adhesion-reducing adhesive tape mainly comprises bio-based material, can be bonded and fixed without curing, can effectively reduce adhesion and realize peeling after power-on, and has good weather resistance.

Description

Technical Field

[0001] This invention belongs to the field of adhesive technology, specifically relating to a weather-resistant, electrically conductive, anti-adhesive tape and its preparation method. Background Technology

[0002] Adhesive tape is a roll of adhesive tape made from paper, cloth, plastic film, elastomer-based pressure-sensitive adhesive, or resin-based pressure-sensitive adhesive. According to the adhesive properties, adhesive tapes can be divided into solvent-based adhesive tapes (oil-based), emulsion-based adhesive tapes (water-based), hot-melt adhesive tapes, calendered adhesive tapes, and reactive adhesive tapes. They are widely used in leather, nameplates, stationery, electronics, automotive trim fixing, footwear, papermaking, and handicrafts for bonding and positioning. Currently, they are also widely used in the electronics, smart devices, medical devices, home appliances, and new energy industries.

[0003] Electro-viscosity reduction technology is a technique that uses an applied electric field to alter the intermolecular interactions within a material, thereby reducing its viscosity. Under the influence of the electric field, the arrangement, orientation, and intermolecular forces of the material molecules change, thus reducing viscosity. (For example, in the transportation of high-viscosity crude oil, applying a specific electric field around the pipeline significantly reduces the flow force of the crude oil, making it easier to transport. Unlike traditional viscosity reduction methods that rely on adding chemical agents or simple heating, electro-viscosity reduction technology does not introduce additional chemical substances. It achieves the viscosity reduction effect solely by controlling the physical properties of the material through an electric field, avoiding the environmental pollution and product quality issues that chemical additives may cause. It also has potential advantages in energy consumption control.)

[0004] Electric-resistant adhesive tape is a high-tech functional tape whose core characteristic is that its adhesive force decreases rapidly and significantly or disappears completely after being energized or subjected to voltage, allowing the bonded parts to be easily and without damage. It can be used to fix and protect precision electronic components, and can be quickly peeled off after cutting or processing by applying electricity / light, avoiding damage to the substrate. It solves the peeling problems in wafer cutting and ultra-thin glass processing, and reduces residual adhesive and stress damage.

[0005] Chinese patent (publication number CN113136159B) discloses a method for preparing an epoxy structural adhesive that can be peeled off on demand by applying electricity. The method involves adding a lithium salt and a coordination polymer to an epoxy resin prepolymer, along with a curing agent. After uniform mixing through a specific mixing process, an epoxy structural adhesive with a certain degree of ionic conductivity is obtained. The adhesive is applied to the substrate using an application process, and after curing, it provides bonding and fixation. When rework or disassembly is required, voltage is applied to both sides of the substrate to achieve peeling and disassembly on demand. The substrate can be a metal interface or a conductive surface. This patented technology requires curing to achieve bonding and fixation, while research on adhesive tapes that can bond without curing is lacking. Furthermore, the materials used are all petroleum-based, which is not environmentally friendly.

[0006] Therefore, how to select bio-based materials as the main components and combine them with other functional materials to prepare an electrically conductive non-adhesive tape that can achieve bonding and fixation without curing, effectively reduce adhesion and peel off after being electrified, and has good weather resistance has become a direction that needs to be studied. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a weather-resistant, electrically conductive, non-adhesive tape and its preparation method. The invention uses bio-based isocyanate and D-sorbitol as raw materials to prepare bio-based polyurethane acrylate, which is then combined with degraded gum arabic and rosin to obtain a bio-based non-adhesive material. An electrically conductive luminescent material is then added and coated to form a weather-resistant, electrically conductive, non-adhesive tape whose main component is bio-based material. This tape achieves bonding and fixation without curing, effectively reduces adhesion and allows for peeling after being electrically applied, and also exhibits good weather resistance.

[0008] In a first aspect, the present invention provides a weather-resistant, electrically conductive, non-stick tape, comprising, by weight, the following components: 100-120 parts of a bio-based non-stick material and 8-12 parts of an electrically conductive luminescent material.

[0009] As a preferred technical solution of the present invention, the weight parts of the bio-based anti-adhesion material can be 100 parts, 105 parts, 110 parts, 115 parts or 120 parts, etc.

[0010] As a preferred technical solution of the present invention, the weight parts of the luminescent material can be 8 parts, 9 parts, 10 parts, 11 parts or 12 parts, etc.

[0011] As a preferred technical solution of the present invention, the preparation method of the bio-based anti-tack material is as follows: first, peach gum is pretreated with lithium chloride to obtain pretreated peach gum solution; hydrogen peroxide solution and the pretreated peach gum solution are mixed and subjected to ultraviolet light irradiation to obtain degraded peach gum; bio-based polyurethane acrylate is prepared using bio-based isocyanate and D-sorbitol as raw materials; bio-based polyurethane acrylate, degraded peach gum and rosin are mixed to obtain bio-based anti-tack material.

[0012] The weather-resistant, electrically conductive, non-adhesive tape of the present invention uses bio-based non-adhesive materials as the main components, wherein degraded gum arabic, bio-based polyurethane acrylate, and rosin have good adhesion properties. Before curing, it forms a flat and uniform surface, achieving good adhesion to the substrate. After being electrically applied, the luminescent properties of the luminescent material cause it to cure. The surface shrinks severely due to cross-linking and curing, forming an uneven structure that results in significant volume shrinkage. This leads to gaps at the bonding interface with the substrate, thereby achieving peelability.

[0013] As a preferred technical solution of the present invention, the pretreatment step is as follows: by weight, 1-3 parts of lithium chloride are added to 18-20 parts of dimethylacetamide at 70-80°C and stirred evenly, then 8-10 parts of peach gum are added, the temperature is raised to 120-130°C and stirred for 6-8 hours, and filtered to obtain pretreated peach gum solution.

[0014] As a preferred technical solution of the present invention, the ultraviolet light irradiation treatment step is as follows: by weight, 6-8 parts of hydrogen peroxide solution with a mass concentration of 30% and 30-40 parts of the pretreated peach gum solution are mixed evenly, and ultraviolet light irradiation treatment is carried out under stirring for 50-60 minutes. Ethyl acetate is added for precipitation, centrifugation is performed, and vacuum drying is carried out to obtain degraded peach gum.

[0015] This invention uses a lithium chloride-containing solvent system to dissolve peach gum to obtain a pretreated peach gum solution. Then, hydrogen peroxide solution is added and irradiated with ultraviolet light at room temperature to generate hydroxyl radicals. These radicals attack the glycosidic bonds in the peach gum polysaccharide, causing the peach gum polysaccharide skeleton to break. This simple and efficient method yields degraded peach gum, which can then be used as a raw material to prepare bio-based anti-adhesion materials.

[0016] As a preferred technical solution of the present invention, the preparation steps of the bio-based polyurethane acrylate are as follows: by weight, under an argon atmosphere, 12-14 parts of bio-based isocyanate and 0.2-0.4 parts of 4-methoxyphenol are added to dimethylacetamide and stirred and mixed. Then, 0.02-0.04 parts of dibutyltin dilaurate and 6-8 parts of hydroxyethyl acrylate are added dropwise and stirred at 50-60°C for 100-120 min. Then, 1-3 parts of D-sorbitol are added and stirred for 2-4 h to obtain the bio-based polyurethane acrylate.

[0017] As a preferred technical solution of the present invention, the preparation steps of the bio-based anti-tack material are as follows: by weight, 2.2-2.6 parts of rosin are added to 10-14 parts of dimethylacetamide and stirred and mixed, then 0.6-1.2 parts of degraded peach gum, 2-6 parts of bio-based polyurethane acrylate, 0.1-0.2 parts of 1-hydroxycyclohexylphenyl ketone and 0.6-0.8 parts of epoxidized soybean oil are added and stirred for 50-60 minutes to obtain the bio-based anti-tack material.

[0018] This invention uses bio-based materials as raw materials, replacing the traditional petroleum-based raw material isophorone diisocyanate with bio-based isocyanate, and replacing the traditional petroleum-based raw material polyol with sorbitol, a carbohydrate with multiple hydroxyl groups in its molecular structure, and combining it with materials such as degraded gum and rosin to prepare a bio-based anti-tack material.

[0019] As a preferred technical solution of the present invention, the preparation method of the electroluminescent material is as follows: calcining and coating iron oxide with glucose as a carbon source to obtain porous carbon-coated iron oxide; preparing a precursor using sodium borohydride and selenium powder as raw materials; adding L-cysteine ​​and cadmium chloride to the precursor and reacting to obtain a cadmium selenide quantum dot solution; adding the porous carbon-coated iron oxide to the cadmium selenide quantum dot solution for adsorption treatment to obtain the electroluminescent material.

[0020] In the electroluminescent material of this invention, cadmium selenide quantum dots, as the core luminescent material, have a quantum confinement effect. After being energized, charge carriers release energy to generate photons through radiative recombination, thereby achieving the electroluminescence effect. Porous carbon can serve as a conductive framework to provide a fast transport channel for charge carriers, and iron oxide guides the charge carriers to migrate directionally to the cadmium selenide quantum dots through its own conduction band, enhancing the electroluminescence effect of the electroluminescent material.

[0021] As a preferred technical solution of the present invention, the preparation steps of the porous carbon-coated iron oxide are as follows: by weight, 2-4 parts of iron oxide are added to 80-100 parts of anhydrous ethanol and ultrasonically mixed evenly, then 20-30 parts of 0.02 mg / mL glucose aqueous solution are added and stirred for 4-6 hours, dried at 70-80°C for 20-24 hours, and then transferred to a tube furnace for calcination and coating to obtain porous carbon-coated iron oxide.

[0022] As a preferred technical solution of the present invention, the calcination coating step is as follows: under nitrogen atmosphere protection, the temperature is raised to 700~800℃ at a heating rate of 5℃ / min, held for 100~120min, and then naturally cooled to room temperature.

[0023] This invention uses glucose as a carbon source. By uniformly mixing glucose with iron oxide and then calcining it at high temperature under nitrogen protection, a porous carbon-coated iron oxide composite material with a core-shell structure is obtained. Carbon coating can effectively improve the electrical conductivity of nanomaterials.

[0024] As a preferred technical solution of the present invention, the preparation steps of the precursor are as follows: by weight, 2-4 parts of sodium borohydride are added to 50-60 parts of deionized water and stirred to dissolve, then 0.1-0.3 parts of selenium powder are added, and the mixture is stirred and reacted at 2-4°C to obtain the precursor.

[0025] As a preferred technical solution of the present invention, the preparation steps of the cadmium selenide quantum dot solution are as follows: by weight, 0.6-0.8 parts of L-cysteine ​​and 0.5-0.7 parts of cadmium chloride are added to 700-800 parts of deionized water, the pH is adjusted to 10.6-10.8, and 50-60 parts of precursor are added under nitrogen protection and stirred for 60-80 minutes to obtain the cadmium selenide quantum dot solution.

[0026] As a preferred technical solution of the present invention, the adsorption treatment steps are as follows: by weight, 0.2 to 0.4 parts of porous carbon-coated iron oxide are added to 300 to 340 parts of cadmium selenide quantum dot solution, adsorbed at room temperature for 24 to 30 hours, washed with anhydrous ethanol, and vacuum dried.

[0027] As a preferred technical solution of the present invention, sodium borohydride and selenium powder are used as raw materials to prepare a precursor. Then, L-cysteine ​​and cadmium chloride are added to synthesize a cadmium selenide quantum dot solution through an aqueous synthesis method. The surface of the quantum dots is modified with L-cysteine. Finally, porous carbon-coated iron oxide is added for adsorption to prepare an electroluminescent material.

[0028] A second aspect of the present invention provides a method for preparing a weather-resistant, electrically conductive, non-stick adhesive tape as described in the first aspect, comprising the following steps:

[0029] By weight, 100-120 parts of bio-based anti-adhesion material and 8-12 parts of electroluminescent material are mixed evenly and coated onto a PET release film to form an adhesive tape layer. The mixture is then vacuum dried at 50-60°C for 10-20 minutes. Finally, a PE protective film is laminated onto the side away from the PET release film to obtain a weather-resistant electroluminescent anti-adhesion tape.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The electro-optical tape of the present invention is composed of bio-based anti-adhesion material and electroluminescent material. Without the application of external voltage, the bio-based anti-adhesion material contains degraded gum, bio-based polyurethane acrylate and rosin with good adhesion. Combined with a flat and uniform surface, it achieves good bonding strength before energization. After the application of external voltage, the cadmium selenide quantum dots in the electroluminescent material achieve good electroluminescence effect under the promotion of porous carbon and iron oxide. The light generated can promote the curing of the bio-based anti-adhesion material. During the curing process, due to severe volume shrinkage, gaps appear at the bonding interface between the tape and the substrate, thereby achieving good peelability after energization. At the same time, this application achieves good peelability by destroying the bonding interface after the bio-based anti-adhesion material is cured. High temperature and high humidity aging treatment will cause a slight decrease in bonding strength. However, under the condition of lack of light effect, the bio-based anti-adhesion material will not be cured, so there will be no volume shrinkage to destroy the interface bond. Therefore, even after high temperature and high humidity aging treatment, it can still maintain good bonding strength, thereby achieving weather resistance.

[0032] (2) In the electroluminescent material of the present invention, cadmium selenide quantum dots, as the core luminescent material, have a quantum confinement effect. After being energized, the charge carriers will release energy and generate photons through radiative recombination, thereby achieving the electroluminescent effect. Porous carbon can serve as a conductive framework to provide a fast transport channel for charge carriers. Iron oxide guides the charge carriers to migrate directionally to the cadmium selenide quantum dots through its own conduction band, thereby enhancing the electroluminescent effect of the electroluminescent material. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 The infrared spectrum of the bio-based polyurethane acrylate in Example 1 of this invention is shown.

[0035] Figure 2 This is the thermogravimetric analysis spectrum of the degraded peach gum in Example 1 of the present invention.

[0036] Figure 3 This is a SEM image of the tape surface before it is powered on in Embodiment 1 of the present invention.

[0037] Figure 4 This is a SEM image of the tape surface after being energized in Embodiment 1 of the present invention.

[0038] Figure 5 This is a schematic diagram of the weather-resistant, electrically conductive, and non-sticky tape structure in Embodiment 1 of the present invention. Detailed Implementation

[0039] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0040] The sources of some components in the examples and comparative examples are as follows:

[0041] Peach gum, product number W01431, was purchased from Wuhan Jiyesheng Chemical Co., Ltd.

[0042] Lithium chloride, CAS No. 7447-41-8, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0043] Hydrogen peroxide solution, catalog number H112515, mass concentration fraction 30%, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0044] Bio-based isocyanate, brand name D-3725N, purchased from Mitsui Chemicals, Japan;

[0045] Hydroxyethyl acrylate, CAS No. 818-61-1, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0046] 4-Methoxyphenol, CAS No. 150-76-5, purchased from Sinopharm Chemical Reagent Co., Ltd.

[0047] Dibutyltin dilaurate, CAS No. 77-58-7, purchased from Sinopharm Chemical Reagent Co., Ltd.

[0048] D-sorbitol, CAS No. 50-70-4, was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0049] Rosin, CAS No. 8050-09-7, purchased from Sinopharm Chemical Reagent Co., Ltd.

[0050] 1-Hydroxycyclohexylphenyl ketone, CAS No. 947-19-3, purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0051] Epoxidized soybean oil, CAS No. 8013-07-8, purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0052] Iron oxide, CAS No. 1332-37-2, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0053] Glucose, CAS No. 50-99-7, purchased from Sinopharm Chemical Reagent Co., Ltd.

[0054] Sodium borohydride, CAS No. 16940-66-2, was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0055] Selenium powder, product number S105193, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.

[0056] L-cysteine, CAS No. 52-90-4, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0057] Cadmium chloride, CAS No. 10108-64-2, was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0058] Epoxy structural adhesive, model EP-5240, purchased from Jiangmen Dezhan Chemical Co., Ltd.

[0059] Example 1:

[0060] This embodiment provides a method for preparing a weather-resistant, electrically conductive, non-adhesive tape, comprising the following steps:

[0061] By weight, 120 parts of bio-based anti-adhesion material and 12 parts of electroluminescent material are mixed evenly and coated onto a PET release film to form an adhesive tape layer. The mixture is then vacuum dried at 60°C for 10 minutes. Finally, a PE protective film is laminated onto the side away from the PET release film to obtain a weather-resistant electroluminescent anti-adhesion tape.

[0062] Preparation of the bio-based anti-adhesion material: By weight, 3 parts of lithium chloride were added to 20 parts of dimethylacetamide at 80°C and stirred until homogeneous. Then, 10 parts of peach gum were added, the mixture was heated to 130°C and stirred for 6 hours, filtered, and a pretreated peach gum solution was obtained. 8 parts of a 30% hydrogen peroxide solution and 40 parts of the pretreated peach gum solution were mixed evenly, and the mixture was irradiated with ultraviolet light for 60 minutes under stirring. Ethyl acetate was added for precipitation, centrifuged, and vacuum dried to obtain degraded peach gum. Under an argon atmosphere, 14 parts of bio-based isocyanate and 0... Four parts of 4-methoxyphenol were added to dimethylacetamide and stirred. Then, 0.04 parts of dibutyltin dilaurate and 8 parts of hydroxyethyl acrylate were added dropwise and stirred at 60°C for 100 min. Then, 3 parts of D-sorbitol were added and stirred for 4 h to obtain bio-based polyurethane acrylate. Two parts of rosin were added to 14 parts of dimethylacetamide and stirred. Then, 1.2 parts of degraded peach gum, 6 parts of bio-based polyurethane acrylate, 0.2 parts of 1-hydroxycyclohexylphenyl ketone and 0.8 parts of epoxidized soybean oil were added and stirred for 60 min to obtain a bio-based anti-tack material.

[0063] Preparation of the electroluminescent material: 4 parts by weight of iron oxide were added to 100 parts by weight of anhydrous ethanol and ultrasonically mixed until homogeneous. Then, 30 parts by weight of 0.02 mg / mL glucose aqueous solution were added and stirred for 6 hours. The iron oxide was dried at 80℃ for 20 h, then transferred to a tube furnace for calcination and coating. Under nitrogen atmosphere protection, the temperature was increased to 800℃ at a rate of 5℃ / min, held for 100 min, and then naturally cooled to room temperature to obtain porous carbon-coated iron oxide. Four parts of sodium borohydride were added to 60 parts of deionized water and stirred to dissolve. Then, 0.3 parts of selenium powder were added and stirred at 4℃ to obtain a precursor. 0.8 parts of L-cysteine ​​and 0.7 parts of cadmium chloride were added to 800 parts of deionized water, the pH was adjusted to 10.8, and 60 parts of the precursor were added under nitrogen atmosphere and stirred for 80 min to obtain a cadmium selenide quantum dot solution. 0.4 parts of porous carbon-coated iron oxide were added to 340 parts of the cadmium selenide quantum dot solution, adsorbed at room temperature for 30 h, washed with anhydrous ethanol, and vacuum dried to obtain an electroluminescent material.

[0064] Example 2:

[0065] This embodiment provides a method for preparing a weather-resistant, electrically conductive, non-adhesive tape, comprising the following steps:

[0066] By weight, 100 parts of bio-based anti-adhesion material and 8 parts of electroluminescent material are mixed evenly and coated onto a PET release film to form an adhesive tape layer. The mixture is then vacuum dried at 50°C for 20 minutes. Finally, a PE protective film is laminated onto the side away from the PET release film to obtain a weather-resistant electroluminescent anti-adhesion tape.

[0067] Preparation of the bio-based anti-adhesion material: By weight, 1 part lithium chloride was added to 18 parts dimethylacetamide at 70°C and stirred until homogeneous. Then, 8 parts peach gum were added, the mixture was heated to 120°C and stirred for 8 hours, filtered, and a pretreated peach gum solution was obtained. 6 parts of a 30% hydrogen peroxide solution and 30 parts of the pretreated peach gum solution were mixed evenly, and the mixture was irradiated with ultraviolet light for 50 minutes under stirring. Ethyl acetate was added for precipitation, centrifuged, and vacuum dried to obtain degraded peach gum. Under an argon atmosphere, 12 parts of bio-based isocyanate and 0... Two parts of 4-methoxyphenol were added to dimethylacetamide and stirred. Then, 0.02 parts of dibutyltin dilaurate and 6 parts of hydroxyethyl acrylate were added dropwise and stirred at 50°C for 120 min. Then, 1 part of D-sorbitol was added and stirred for 2 h to obtain bio-based polyurethane acrylate. Two parts of rosin were added to 10 parts of dimethylacetamide and stirred. Then, 0.6 parts of degraded peach gum, 2 parts of bio-based polyurethane acrylate, 0.1 parts of 1-hydroxycyclohexylphenyl ketone and 0.6 parts of epoxidized soybean oil were added and stirred for 50 min to obtain bio-based anti-tack material.

[0068] Preparation of the electroluminescent material: By weight, 2 parts of iron oxide were added to 80 parts of anhydrous ethanol and ultrasonically mixed until homogeneous. Then, 20 parts of 0.02 mg / mL glucose aqueous solution were added and stirred for 4 hours. The mixture was dried at 70°C for 24 hours, then transferred to a tube furnace for calcination and coating. Under a nitrogen atmosphere, the temperature was increased to 700°C at a rate of 5°C / min, held for 120 minutes, and then naturally cooled to room temperature to obtain porous carbon-coated iron oxide. 2 parts of sodium borohydride were added to 50 parts of deionized... The precursor was obtained by stirring and dissolving the precursor in deionized water, then adding 0.1 parts of selenium powder and stirring at 2°C. 0.6 parts of L-cysteine ​​and 0.5 parts of cadmium chloride were added to 700 parts of deionized water, the pH was adjusted to 10.6, and 50 parts of the precursor were added under nitrogen protection and stirred for 60 min to obtain a cadmium selenide quantum dot solution. 0.2 parts of porous carbon-coated iron oxide were added to 300 parts of the cadmium selenide quantum dot solution, adsorbed at room temperature for 24 h, washed with anhydrous ethanol, and vacuum dried to obtain an luminescent material.

[0069] Example 3:

[0070] This embodiment provides a method for preparing a weather-resistant, electrically conductive, non-adhesive tape, comprising the following steps:

[0071] By weight, 110 parts of bio-based anti-adhesion material and 10 parts of electroluminescent material are mixed evenly and coated onto a PET release film to form an adhesive tape layer. The mixture is then vacuum dried at 55°C for 15 minutes. Finally, a PE protective film is laminated onto the side away from the PET release film to obtain a weather-resistant electroluminescent anti-adhesion tape.

[0072] Preparation of the bio-based anti-adhesion material: By weight, 2 parts of lithium chloride were added to 19 parts of dimethylacetamide at 75°C and stirred until homogeneous. Then, 9 parts of peach gum were added, and the mixture was heated to 125°C and stirred for 7 hours. After filtration, a pretreated peach gum solution was obtained. 7 parts of a 30% hydrogen peroxide solution and 35 parts of the pretreated peach gum solution were mixed evenly and irradiated with ultraviolet light for 55 minutes under stirring. Ethyl acetate was added for precipitation, and the mixture was centrifuged and vacuum dried to obtain degraded peach gum. Under an argon atmosphere, 13 parts of bio-based isocyanate and 0.3... 4-Methoxyphenol was added to dimethylacetamide and stirred. Then, 0.03 parts of dibutyltin dilaurate and 7 parts of hydroxyethyl acrylate were added dropwise and stirred at 55°C for 110 min. Then, 2 parts of D-sorbitol were added and stirred for 3 h to obtain bio-based polyurethane acrylate. 2.4 parts of rosin were added to 12 parts of dimethylacetamide and stirred. Then, 0.8 parts of degraded peach gum, 4 parts of bio-based polyurethane acrylate, 0.15 parts of 1-hydroxycyclohexylphenyl ketone and 0.7 parts of epoxidized soybean oil were added and stirred for 55 min to obtain a bio-based anti-tack material.

[0073] Preparation of the electroluminescent material: 3 parts by weight of iron oxide were added to 90 parts by weight of anhydrous ethanol and ultrasonically mixed until homogeneous. Then, 25 parts by weight of 0.02 mg / mL glucose aqueous solution were added and stirred for 5 hours. The mixture was dried at 75°C for 22 hours, then transferred to a tube furnace for calcination and coating. Under a nitrogen atmosphere, the temperature was increased to 750°C at a rate of 5°C / min and held for 110 minutes. The mixture was then naturally cooled to room temperature to obtain porous carbon-coated iron oxide. 3 parts by weight of sodium borohydride were added to 55 parts by weight of deionized iron oxide. The precursor was obtained by stirring and dissolving the precursor in deionized water, then adding 0.2 parts of selenium powder and stirring at 3°C. 0.7 parts of L-cysteine ​​and 0.6 parts of cadmium chloride were added to 750 parts of deionized water, the pH was adjusted to 10.7, and 55 parts of the precursor were added under nitrogen protection and stirred for 70 min to obtain a cadmium selenide quantum dot solution. 0.3 parts of porous carbon-coated iron oxide were added to 320 parts of the cadmium selenide quantum dot solution, adsorbed at room temperature for 26 h, washed with anhydrous ethanol, and vacuum dried to obtain an luminescent material.

[0074] Comparative Example 1

[0075] The difference between this comparative example and Example 1 is that an epoxy structural adhesive (model EP-5240) was used instead of the bio-based anti-adhesion material.

[0076] Comparative Example 2

[0077] The difference between this comparative example and Example 1 is that no electrically luminescent material is added to the tape.

[0078] Two stainless steel substrates were bonded together using the adhesive tape from the above examples and comparative examples to obtain test specimens, and performance tests were then conducted.

[0079] Bond strength test before energization: Use a universal testing machine to run the test specimen along the shear direction at a speed of 10 mm / min until the specimen fails to bond. Record the maximum force value displayed by the instrument and calculate the bond strength before energization based on the bonding area.

[0080] Bonding strength test after power-on: The positive and negative wires of the DC power supply are clamped to both ends of the test sample respectively. After 20 minutes at 48V, the sample is removed and the sample is run along the shear direction at a speed of 10mm / min using a universal testing machine until the sample fails to bond. The maximum force value displayed by the instrument is recorded. The bonding strength after power-on is calculated in combination with the bonding area. When the bonding strength is below 2MPa, it has peelability.

[0081] Bond strength after high temperature and high humidity aging: After placing the test specimen in a high temperature and high humidity oven at 85℃ and 85%RH for 7 days, the specimen was run along the shear direction at a speed of 10mm / min using a universal testing machine until the specimen failed to bond. The maximum force value displayed by the instrument was recorded, and the bond strength after high temperature and high humidity aging was calculated in combination with the bonding area.

[0082] The performance test data above are shown in Table 1.

[0083] Table 1 Performance Test Results

[0084] Bond strength before energization (MPa) Peelability after 48V power-on for 20 minutes Bond strength (MPa) after high temperature and high humidity aging Example 1 1.91 Peelable 1.64 Example 2 1.84 Peelable 1.57 Example 3 1.88 Peelable 1.61 Comparative Example 1 1.42 Non-removable 0.92 Comparative Example 2 1.73 Non-removable 1.44

[0085] As can be seen from the above, the electrolytically conductive anti-adhesive tape of the present invention is composed of a bio-based anti-adhesive material and an electroluminescent material. Without the application of an external voltage, the degraded gum arabic, bio-based polyurethane acrylate, and rosin in the bio-based anti-adhesive material exhibit good adhesion, and the flat and uniform surface contributes to good pre-electrolytic bonding strength. When an external voltage is applied, the light generated by the electroluminescent material promotes the curing of the bio-based anti-adhesive material. During the curing process, severe volume shrinkage causes gaps at the bonding interface between the tape and the substrate, resulting in good peelability after electrolysis. Furthermore, since the bio-based anti-adhesive material only cures and breaks down the bonding interface under the influence of light, it exhibits good weather resistance, and its bonding strength remains at a good level after high-temperature and high-humidity aging (Examples 1-3).

[0086] Compared to Example 1, when epoxy structural adhesive (model EP-5240) was used instead of bio-based anti-adhesion material, the epoxy structural adhesive could not interact with the electroluminescent material, so the tape could not be peeled off after being electrified and had poor weather resistance (Comparative Example 1); compared to Example 1, no electroluminescent material was added, and the lack of the luminescent effect produced by the electroluminescent material resulted in the tape being unable to be peeled off after being electrified and having poor weather resistance (Comparative Example 2).

Claims

1. A weather-resistant electrically conductive adhesion-reducing tape, characterized in that, comprising the following components by weight: 100-120 parts of a bio-based adhesion-reducing material and 8-12 parts of an electrically conductive light-emitting material; The preparation method of the bio-based adhesion-reducing material is: first, using lithium chloride to pretreat peach gum to obtain pretreated peach gum solution; Mix hydrogen peroxide solution and the pretreated peach gum solution and perform ultraviolet irradiation treatment to obtain degraded peach gum; bio-based polyurethane acrylate is prepared using bio-based isocyanate and D-sorbitol as raw materials; the bio-based adhesion-reducing material is obtained by mixing bio-based polyurethane acrylate, degraded peach gum and rosin; The preparation steps of the bio-based polyurethane acrylate are: under an argon atmosphere, 12-14 parts of bio-based isocyanate and 0.2-0.4 parts of 4-methoxyphenol are added to dimethylacetamide and stirred, then 0.02-0.04 parts of dibutyltin dilaurate and 6-8 parts of hydroxyethyl acrylate are added dropwise and stirred at 50-60°C for 100-120 min, and then 1-3 parts of D-sorbitol is added and stirred for 2-4 h to obtain bio-based polyurethane acrylate; The preparation steps of the bio-based adhesion-reducing material are: by weight, 2.2-2.6 parts of rosin are added to 10-14 parts of dimethylacetamide and stirred, then 0.6-1.2 parts of degraded peach gum, 2-6 parts of bio-based polyurethane acrylate, 0.1-0.2 parts of 1-hydroxycyclohexyl phenyl ketone and 0.6-0.8 parts of epoxy soybean oil are added and stirred for 50-60 min to obtain the bio-based adhesion-reducing material; The preparation method of the electrically conductive light-emitting material is: using glucose as a carbon source to calcine and coat iron oxide to obtain porous carbon-coated iron oxide; a precursor is prepared using sodium borohydride and selenium powder as raw materials, L-cysteine and cadmium chloride are added to the precursor, and a cadmium selenide quantum dot solution is obtained by reaction; the porous carbon-coated iron oxide is added to the cadmium selenide quantum dot solution for adsorption treatment to obtain the electrically conductive light-emitting material.

2. The weather-resistant electrically conductive adhesion-reducing tape according to claim 1, characterized in that, The pretreatment step is: by weight, 1-3 parts of lithium chloride is added to 18-20 parts of dimethylacetamide and stirred uniformly at 70-80°C, then 8-10 parts of peach gum is added, heated to 120-130°C and stirred for 6-8 h, filtered to obtain pretreated peach gum solution.

3. The weather-resistant electrically conductive adhesion-reducing tape according to claim 1, characterized in that, The ultraviolet irradiation treatment step is: by weight, 6-8 parts of 30% mass concentration hydrogen peroxide solution and 30-40 parts of the pretreated peach gum solution are mixed uniformly, and ultraviolet irradiation treatment is performed under stirring conditions for 50-60 min, then ethyl acetate is added for precipitation, centrifuged, vacuum dried to obtain degraded peach gum.

4. The weather-resistant electrically conductive adhesion-reducing tape according to claim 1, characterized in that, The preparation steps of the porous carbon-coated iron oxide are as follows: by weight, 2-4 parts of iron oxide are added to 80-100 parts of anhydrous ethanol and ultrasonically mixed evenly. Then, 20-30 parts of 0.02 mg / mL glucose aqueous solution are added and stirred for 4-6 hours. The mixture is dried at 70-80°C for 20-24 hours and then transferred to a tube furnace for calcination and coating to obtain porous carbon-coated iron oxide.

5. The weather-resistant, electrically conductive, and non-stick tape according to claim 1, characterized in that, The preparation steps of the precursor are as follows: by weight, 2-4 parts of sodium borohydride are added to 50-60 parts of deionized water and stirred to dissolve, then 0.1-0.3 parts of selenium powder are added, and the mixture is stirred and reacted at 2-4°C to obtain the precursor.

6. The weather-resistant, electrically conductive, and non-stick tape according to claim 1, characterized in that, The preparation steps of the cadmium selenide quantum dot solution are as follows: by weight, 0.6-0.8 parts of L-cysteine ​​and 0.5-0.7 parts of cadmium chloride are added to 700-800 parts of deionized water, the pH is adjusted to 10.6-10.8, and 50-60 parts of precursor are added under nitrogen protection and stirred for 60-80 minutes to obtain the cadmium selenide quantum dot solution.

7. A method for preparing a weather-resistant, electrically conductive, non-adhesive tape as described in any one of claims 1-6, characterized in that, The process includes the following steps: by weight, 100-120 parts of bio-based anti-adhesion material and 8-12 parts of electroluminescent material are mixed evenly and coated onto a PET release film to form an adhesive tape layer. The mixture is then vacuum dried at 50-60°C for 10-20 minutes. Finally, a PE protective film is laminated onto the side of the adhesive tape layer away from the PET release film to obtain a weather-resistant electroluminescent anti-adhesion tape.

Images