Adhesive tape that loses adhesion after being powered on, preparation method thereof, and application thereof

Abstract

The present invention discloses an adhesive tape that loses adhesion after power-on, and a preparation method and application thereof, and relates to adhesive materials. An octahedral ligand-modified CNC composite is prepared, an acrylate copolymer main resin, a dipole-responsive acrylate monomer, a solvent and a dispersant are weighed and mixed according to a ratio, a photoinitiator is added, UV prepolymerization is performed under nitrogen protection, an ion transport medium, a tackifying resin and an anti-precipitation agent are added, the temperature is increased, high-speed shear emulsification is performed, the temperature is lowered, and the octahedral ligand-modified CNC composite is added, and an adhesive is obtained by reaction; the adhesive is applied to a plasma-treated PET release film, hot air drying is performed, the plasma-treated PET release film is attached to the other side of the adhesive layer, and secondary UV curing is performed to obtain an adhesive tape that loses adhesion after power-on. The adhesive tape that loses adhesion after power-on prepared by the present invention has the advantages of strong adhesion, sensitive response, significant difference in peeling force before and after power-on, no peeling residue, stable cycle and low power-on loss.

Description

Technical Field

[0001] The invention relates to the technical field of adhesive materials, in particular to an adhesive tape that loses its adhesiveness after being energized, and a preparation method and application thereof. Background Art

[0002] As a smart adhesive material, adhesive tape that loses adhesion after power-on has shown its application potential in the fields of temporary fixation of electronic components, dynamic sealing of smart packaging, repeated positioning tape for metal processing, and medical electrode patches in recent years. In the existing technology, adhesive tape that loses adhesion after power-on still has the following defects: First, the interface residue problem caused by electrolyte migration is prominent, and conductive residues are easily formed on the surface of precision electronic components; second, the peeling force regulation range is insufficient, and the difference in adhesion before and after power-on is small, which is difficult to meet the needs of high-precision positioning; third, the cycle stability is poor, and viscosity attenuation or electrode passivation often occurs after a few voltage cycles. The market urgently needs to develop an adhesive tape that loses adhesion after power-on, which has fast response characteristics, cycle stability, no peeling residue, and significant peeling force difference before and after power-on. Summary of the invention

[0003] The object of the present invention is to provide an adhesive tape that loses adhesion after being powered on, and a preparation method and application thereof, so as to solve the problems raised in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0006] 60-70 parts of acrylic copolymer main resin;

[0007] 12-18 parts of 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt;

[0008] 8-12 parts of dipole responsive acrylate monomer;

[0009] 6.5-10 copies of the CNC complex modified with octahedral ligands;

[0010] 20-30 parts of solvent;

[0011] 6-10 parts of tackifying resin;

[0012] 1-2 parts of anti-precipitation agent;

[0013] Dispersant 0.9-1.5 parts.

[0014] Furthermore, the main resin of the acrylic ester copolymer is isobornyl acrylate-hydroxypropyl acrylate copolymer, and the content of hydroxypropyl acrylate in the isobornyl acrylate-hydroxypropyl acrylate copolymer is 8-12%. The specific preparation steps are as follows:

[0015] A1. In a nitrogen atmosphere, toluene, isobornyl acrylate, hydroxypropyl acrylate and a chain transfer agent were added into a four-necked flask in sequence, the temperature was raised to 65° C., and the mixture was stirred at a speed of 300 r / min;

[0016] Furthermore, in the step A1, the chain transfer agent is n-dodecyl mercaptan;

[0017] A2, dissolving the initiator in toluene to obtain an initiator solution, slowly adding the initiator solution dropwise into the four-necked flask of step A1 through a constant pressure dropping funnel within 1 hour, reacting at 65° C. with stirring for 4 hours, heating to 75° C. for 2 hours, and heating to 85° C. for 1 hour to obtain a mixed solution;

[0018] Furthermore, in step A2, the ratio of the initiator to toluene is 1 g:10 mL, and the initiator is azobisisobutyronitrile; the amount of the initiator is 0.5% of the total mass of isobornyl acrylate and hydroxypropyl acrylate;

[0019] A3, the mixed solution was cooled to 40°C, an adsorbent was added and stirred for 30 minutes to obtain a crude solution, the crude solution was poured into n-hexane for precipitation, the precipitation was filtered and precipitated three times, and vacuum dried at 50°C for 24 hours to obtain a transparent elastic particle acrylate copolymer main resin;

[0020] Furthermore, in step A3, the adsorbent is 97% diatomaceous earth and 3% activated carbon; the amount of the adsorbent is 2-3% of the total mass of the mixed solution; and the volume ratio of the crude solution to n-hexane is 1:(9-11).

[0021] It should be noted that the rigid cyclic structure of isobornyl acrylate provides a higher glass transition temperature, giving the adhesive excellent creep resistance and cohesion, and its hydrophobicity can reduce the effect of environmental humidity on adhesion. The hydroxyl group of hydroxypropyl acrylate and the ester group of isobornyl acrylate form intermolecular hydrogen bonds to construct a reversible physical cross-linking network; when no power is applied, the existence of the hydrogen bond network ensures a higher peel strength. When power is applied, the electric field induces the rearrangement of the dipoles (hydroxyl group of hydroxypropyl acrylate and ester group of isobornyl acrylate), the bond energy is reduced, and the hydrogen bonds are destroyed. The entire process uses the reversibility of hydrogen bonds to achieve responsiveness.

[0022] It should be noted again that isobornyl acrylate needs to go through a pretreatment step of an alkaline alumina column to remove the inhibitor that comes with the material when it leaves the factory.

[0023] Furthermore, in A1, the usage ratio of toluene, isobornyl acrylate, hydroxypropyl acrylate and n-dodecyl mercaptan is (160-180) mL:70 g:30 g:0.1 g.

[0024] Furthermore, the dipole-responsive acrylate monomer is a tetrahydrofuran acrylate monomer or an ethoxylated tetrahydrofuran acrylate monomer.

[0025] It should be noted that tetrahydrofuran acrylate monomer or ethoxylated tetrahydrofuran acrylate monomer can enhance the adhesion of the adhesive, provide toughness for the cured adhesive, and adjust the viscosity of the system. In addition to maintaining the above-mentioned effective characteristics, ethoxylated tetrahydrofuran acrylate monomer also eliminates the irritation and odor of tetrahydrofuran acrylate monomer; the oxygen atom of the tetrahydrofuran hybrid ring has a high electron density, and its dipole characteristics show a reversible response under external field regulation. When no power is applied, the dipole moment of the tetrahydrofuran acrylate monomer is randomly distributed, and the polar groups of the ether bond oxygen and the ester group form a strong interaction with the surface of the substrate that can be bonded through van der Waals force and hydrogen bonds. When power is applied, the ether bond oxygen (negative end) moves toward the positive electrode, and the carbonyl group of the ester group (positive end) moves toward the negative electrode, resulting in the overall dipole direction of the molecule being consistent with the direction of the electric field, the dipole moment direction flipping, weakening the van der Waals force with the surface of the bonded substrate, and reducing the interfacial bonding force; the ether bond provides rotational freedom, which promotes the rearrangement of the molecular chain under the electric field.

[0026] It needs to be explained again that the dipole moment of the tetrahydrofuran acrylate monomer is reversed, the polar group is away from the surface of the bonding substrate, the surface energy is reduced, the contact angle is increased, the interface wettability is reduced, the adhesion work is reduced, and the physical interface slip layer formed by the alkyl chain of the 1-ethyl-3-methylimidazolium ion in the 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt synergistically plays a role in reducing the residual glue marks on the bonding surface.

[0027] Furthermore, the solvent is propylene glycol methyl ether acetate and tetrahydrofuran, and the mass ratio of propylene glycol methyl ether acetate to tetrahydrofuran is 7:3.

[0028] Furthermore, the tackifying resin is hydrogenated C9 petroleum resin.

[0029] It should be noted that, on the one hand, hydrogenated C9 petroleum resin can improve viscosity and thermal stability. Hydrogenation leads to a reduction in double bonds, thereby avoiding reaction with ionic liquids. On the other hand, the flexible chain of hydrogenated C9 petroleum resin complements the rigid structure of isobornyl acrylate in isobornyl acrylate-hydroxypropyl acrylate copolymer, thereby reducing circulation losses.

[0030] Furthermore, the anti-precipitation agent is a polydimethylsiloxane-polyethylene oxide block copolymer.

[0031] It should be noted that the ether oxygen bond of the polyethylene oxide segment complexes with the bis(trifluoromethanesulfonyl)imide ion to restrain the migration of anions; the polydimethylsiloxane segment spontaneously migrates to the interface to form a thick barrier layer, which greatly reduces the ion permeability and forms a surface barrier to inhibit the precipitation of electrolytes after power is applied. At the same time, the bis(trifluoromethanesulfonyl)imide ion of 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt has a large volume and can also inhibit precipitation to a certain extent.

[0032] Furthermore, the dispersant is polyoxyethylene lauryl ether or fluoroalkyl epoxy and adducts thereof.

[0033] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0034] S1. Disperse carboxylated cellulose nanocrystals in tetrahydrofuran, homogenize with ultrasound for 30 min, add 2,2-bipyridine-4,4-diol and p-toluenesulfonic acid, react at 60°C and 500 r / min for 5-8 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse bipyridine group-modified CNC in propylene glycol methyl ether acetate, add ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain octahedral ligand-modified CNC complex;

[0035] Furthermore, in step S1, the mass ratio of the carboxylated cellulose nanocrystals, 2,2-bipyridine-4,4-diol and ferric acetylacetonate is (4-6):(1.92-2.88):(0.6-1); the amount ratio of the carboxylated cellulose nanocrystals, tetrahydrofuran and propylene glycol methyl ether acetate is 1 g:40 mL:10 mL; the amount of p-toluenesulfonic acid is 0.1% of the total mass of the carboxylated cellulose nanocrystals, tetrahydrofuran and 2,2-bipyridine-4,4-diol;

[0036] It should be noted that tetrahydrofuran has the characteristics of strong polarity and low viscosity, which can effectively destroy the hydrogen bond network of carboxylated cellulose nanocrystals and prevent nanofibers from agglomerating; the carboxyl groups on the surface of carboxylated cellulose nanocrystals form a hydrogen bond network with hydroxypropyl acrylate, and the carboxyl groups on the surface of carboxylated cellulose nanocrystals react with 2,2-bipyridine-4,4-diol under acidic conditions to undergo esterification, and the bipyridine group acts as a strong ligand to provide an anchoring point for the subsequent coordination of trivalent iron ions; propylene glycol methyl ether acetate, as a high donor number solvent, can promote the Fe 3+ dissolve, while avoiding side reactions with carboxylated cellulose nanocrystals, and the acetylacetone ligand stabilizes Fe 3+ , to avoid redox reactions when electricity is applied; bipyridine, as a bidentate ligand, provides two pairs of lone pairs of electrons in each molecule through two nitrogen atoms, forming two coordination bonds with metal ions to form a stable five-membered chelate ring. The strong coordination field effect of bipyridine will lead to Fe3+ The d electrons of Fe 3+ The total coordination number is 6, with each bipyridine group occupying 2 sites, one Fe 3+ It can coordinate with up to 3 bipyridine groups to form a stable [Fe(bpy)3] 3+ type octahedral coordination complex; when voltage is applied, the cooperative dipole responds to the change in the dipole moment of the acrylate monomer, reducing the activation energy, Fe 3+ -The bipyridine coordination bond dissociates and the peeling force decreases rapidly.

[0037] S2, weighing the main acrylate copolymer resin, dipole-responsive acrylate monomer, solvent and dispersant according to the ratio and mixing, adding a photoinitiator, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt, tackifying resin and anti-precipitation agent, heating to 50-55° C., using a high-speed shear emulsifier to react at a speed of 15000 r / min for 20-30 min, cooling by 40-45° C., adding the octahedral ligand-modified CNC complex obtained in S1, reacting at a speed of 300 r / min for 2-3 h, and obtaining an adhesive;

[0038] Furthermore, in step S2, the photoinitiator is photoinitiator 819; the amount of the photoinitiator is 0.05-0.09% of the total mass of the acrylate copolymer main resin, the dipole-responsive acrylate monomer, the solvent and the dispersant;

[0039] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0040] The invention discloses an adhesive tape that loses its adhesiveness after being powered on and is used in the fields of electronic components, smart packaging, reusable adhesive tape for metal use scenarios and medical electrode patches.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The adhesive tape that loses its adhesion after power-on prepared by the present invention has the advantages of strong adhesion, sensitive response, significant difference in peeling force before and after power-on, no peeling residue, cyclic stability and low power-on loss. The characteristic of regulating adhesion by electric field can realize non-destructive disassembly and reuse of devices, and has great potential in scenarios such as flexible electronic assembly and industrial fixture positioning. DETAILED DESCRIPTION

[0043] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The polydimethylsiloxane-polyethylene oxide block copolymer was purchased from Shanghai Saikerui Biotechnology Co., Ltd. with the brand name SCPP-80441.

[0045] Polyoxyethylene lauryl ether was purchased from Dalian Bogreen Biotechnology Co., Ltd. with the brand name MB4841.

[0046] The specific preparation steps of isobornyl acrylate-hydroxypropyl acrylate copolymer are as follows:

[0047] A1. In a nitrogen atmosphere, 168.2 mL of toluene, 70 g of isobornyl acrylate, 30 g of hydroxypropyl acrylate and 0.1 g of n-dodecyl mercaptan were added to a four-necked flask in sequence, the temperature was raised to 65° C., and the mixture was stirred at a speed of 300 r / min.

[0048] A2, dissolving 0.5 g of azobisisobutyronitrile in 5 mL of toluene to obtain an initiator solution, slowly dropping the initiator solution into a four-necked flask through a constant pressure dropping funnel within 1 h, reacting at 65 ° C with stirring for 4 h, heating to 75 ° C for 2 h, and heating to 85 ° C for 1 h to obtain a mixed solution;

[0049] A3. Cool down to 40°C, add 3% of the total mass of the mixed solution as adsorbent and stir for 30 minutes, the adsorbent is 97% diatomaceous earth and 3% activated carbon to obtain a crude solution, pour the crude solution into 1800 mL of n-hexane for precipitation, filter and precipitate repeatedly three times, and vacuum dry the crude product at 50°C for 24 hours to obtain a transparent elastic particle acrylate copolymer main resin.

[0050] The polydimethylsiloxane-polyethylene oxide block copolymer was purchased from Shanghai Saikerui Biotechnology Co., Ltd. with the brand name SCPP-80441.

[0051] Polyoxyethylene lauryl ether was purchased from Dalian Bogreen Biotechnology Co., Ltd. with the brand name MB4841.

[0052] Embodiment 1:

[0053] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0054] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 65 parts;

[0055] 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt 15 parts;

[0056] 10 parts of tetrahydrofuran acrylate monomer;

[0057] 8.2 copies of the CNC complex modified with octahedral ligands;

[0058] Propylene glycol methyl ether acetate 17.5 parts;

[0059] 7.5 parts of tetrahydrofuran;

[0060] 8 parts of hydrogenated C9 petroleum resin;

[0061] 1.5 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0062] 1.2 parts of polyoxyethylene lauryl ether.

[0063] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0064] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0065] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, reacting at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0066] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0067] Embodiment 2:

[0068] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0069] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 60 parts;

[0070] 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide salt 12 parts;

[0071] 8 parts of tetrahydrofuran acrylate monomer;

[0072] 6.5 copies of the CNC complex modified with octahedral ligands;

[0073] Propylene glycol methyl ether acetate 14 parts;

[0074] 6 parts of tetrahydrofuran;

[0075] 6 parts of hydrogenated C9 petroleum resin;

[0076] 1 part of polydimethylsiloxane-polyethylene oxide block copolymer;

[0077] Polyoxyethylene lauryl ether 0.9 parts.

[0078] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0079] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0080] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, reacting at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0081] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0082] Embodiment 3:

[0083] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0084] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 70 parts;

[0085] 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt 18 parts;

[0086] 12 parts of tetrahydrofuran acrylate monomer;

[0087] 10 copies of the CNC complex modified with octahedral ligands;

[0088] Propylene glycol methyl ether acetate 21 parts;

[0089] 9 parts of tetrahydrofuran;

[0090] 10 parts of hydrogenated C9 petroleum resin;

[0091] 2 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0092] 1.5 parts of polyoxyethylene lauryl ether.

[0093] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0094] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0095] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, reacting at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0096] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0097] Comparative Example 1

[0098] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0099] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 65 parts;

[0100] 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt 15 parts;

[0101] 10 parts of tetrahydrofuran acrylate monomer;

[0102] 8.2 parts of carboxylated cellulose nanocrystals;

[0103] Propylene glycol methyl ether acetate 17.5 parts;

[0104] 7.5 parts of tetrahydrofuran;

[0105] 8 parts of hydrogenated C9 petroleum resin;

[0106] 1.5 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0107] 1.2 parts of polyoxyethylene lauryl ether.

[0108] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0109] S1. Weigh isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mix them, add 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, perform UV prepolymerization under nitrogen protection, add 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heat to 50°C, react at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cool by 40°C, add carboxylated cellulose nanocrystals, react at a speed of 300r / min for 3h to prepare an adhesive;

[0110] S2. Apply the adhesive to the plasma-treated PET release film I, dry it with hot air at 80°C for 3 minutes, attach the plasma-treated PET release film II to the other side of the adhesive layer, and perform secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0111] The difference between this comparative example and Example 1 is that the CNC composite modified with octahedral ligands is not prepared, and carboxylated cellulose nanocrystals are directly added.

[0112] Comparative Example 2

[0113] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0114] 65 parts of isobornyl acrylate;

[0115] 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt 15 parts;

[0116] 10 parts of tetrahydrofuran acrylate monomer;

[0117] 8.2 copies of the CNC complex modified with octahedral ligands;

[0118] Propylene glycol methyl ether acetate 17.5 parts;

[0119] 7.5 parts of tetrahydrofuran;

[0120] 8 parts of hydrogenated C9 petroleum resin;

[0121] 1.5 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0122] 1.2 parts of polyoxyethylene lauryl ether.

[0123] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0124] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0125] S2, weighing isobornyl acrylate, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, using a high-speed shear emulsifier to react at a speed of 15000r / min for 30min, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0126] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0127] The difference between this comparative example and Example 1 is that isobornyl acrylate-hydroxypropyl acrylate copolymer is not added, and isobornyl acrylate is directly used.

[0128] Comparative Example 3

[0129] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0130] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 65 parts;

[0131] 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt 15 parts;

[0132] 10 parts of tetrahydrofuran acrylate monomer;

[0133] 8.2 copies of the CNC complex modified with octahedral ligands;

[0134] Propylene glycol methyl ether acetate 17.5 parts;

[0135] 7.5 parts of tetrahydrofuran;

[0136] 8 parts of hydrogenated C9 petroleum resin;

[0137] 1.2 parts of polyoxyethylene lauryl ether.

[0138] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0139] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0140] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt and hydrogenated C9 petroleum resin, heating to 50°C, reacting at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0141] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0142] The difference between this comparative example and Example 1 is that no polydimethylsiloxane-polyethylene oxide block copolymer anti-precipitation agent is added.

[0143] Comparative Example 4

[0144] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0145] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 65 parts;

[0146] 1-ethyl-3-methylimidazolium bromide 15 parts;

[0147] 10 parts of tetrahydrofuran acrylate monomer;

[0148] 8.2 copies of the CNC complex modified with octahedral ligands;

[0149] Propylene glycol methyl ether acetate 17.5 parts;

[0150] 7.5 parts of tetrahydrofuran;

[0151] 8 parts of hydrogenated C9 petroleum resin;

[0152] 1.5 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0153] 1.2 parts of polyoxyethylene lauryl ether.

[0154] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0155] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0156] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazolium bromide, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, reacting at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0157] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0158] The difference between this comparative example and Example 1 is that 1-ethyl-3-methylimidazolium bistrifluoromethanesulfonyl imide salt is not used as the ion transport medium, but 1-ethyl-3-methylimidazolium bromide salt is used as the ion transport medium.

[0159] Comparative Example 5

[0160] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0161] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 65 parts;

[0162] 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt 15 parts;

[0163] 8.2 copies of the CNC complex modified with octahedral ligands;

[0164] Propylene glycol methyl ether acetate 17.5 parts;

[0165] 7.5 parts of tetrahydrofuran;

[0166] 8 parts of hydrogenated C9 petroleum resin;

[0167] 1.5 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0168] 1.2 parts of polyoxyethylene lauryl ether.

[0169] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0170] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0171] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, using a high-speed shear emulsifier to react at a speed of 15000r / min for 30min, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0172] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0173] The difference between this comparative example and Example 1 is that no tetrahydrofuran acrylate monomer is added.

[0174] Comparative Example 6

[0175] An adhesive tape that loses its adhesiveness after being energized comprises an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and the adhesive comprises the following raw material components by weight:

[0176] Isobornyl acrylate-hydroxypropyl acrylate copolymer (the content of hydroxypropyl acrylate is 12%) 65 parts;

[0177] 15 parts of lithium bis(trifluoromethanesulfonyl)imide;

[0178] 10 parts of tetrahydrofuran acrylate monomer;

[0179] 8.2 copies of the CNC complex modified with octahedral ligands;

[0180] Propylene glycol methyl ether acetate 17.5 parts;

[0181] 7.5 parts of tetrahydrofuran;

[0182] 8 parts of hydrogenated C9 petroleum resin;

[0183] 1.5 parts of polydimethylsiloxane-polyethylene oxide block copolymer;

[0184] 1.2 parts of polyoxyethylene lauryl ether.

[0185] A method for preparing an adhesive tape that loses adhesion after being powered on comprises the following steps:

[0186] S1. Disperse 5 g of carboxylated cellulose nanocrystals in 200 mL of tetrahydrofuran, homogenize with ultrasound for 30 min, add 2.4 g of 2,2-bipyridine-4,4-diol and 0.19 g of p-toluenesulfonic acid, react at 60 ° C and 500 r / min for 6 h, centrifuge, precipitate, and wash to obtain bipyridine group-modified CNC, disperse the bipyridine group-modified CNC in 50 mL of propylene glycol methyl ether acetate, add 0.8 g of ferric acetylacetonate, react at room temperature and 800 r / min for 12 h, and obtain an octahedral ligand-modified CNC complex;

[0187] S2, weighing isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether according to the ratio and mixing, adding 0.08% of the total mass of isobornyl acrylate-hydroxypropyl acrylate copolymer, tetrahydrofuran acrylate monomer, propylene glycol methyl ether acetate, tetrahydrofuran and polyoxyethylene lauryl ether as photoinitiator 819, performing UV prepolymerization under nitrogen protection, adding lithium bistrifluoromethanesulfonyl imide, hydrogenated C9 petroleum resin and polydimethylsiloxane-polyethylene oxide block copolymer, heating to 50°C, reacting at a speed of 15000r / min for 30min using a high-speed shear emulsifier, cooling by 40°C, adding the octahedral ligand-modified CNC composite obtained in S1, reacting at a speed of 300r / min for 3h, and preparing an adhesive;

[0188] S3, applying the adhesive to the plasma-treated PET release film I, drying it with hot air at 80°C for 3 minutes, attaching the plasma-treated PET release film II to the other side of the adhesive layer, and performing secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

[0189] The difference between this comparative example and Example 1 is that 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl imide) salt is not used, but lithium bis(trifluoromethanesulfonyl imide) is used as the ion transport medium.

[0190] test:

[0191] 1. Surface resistance test

[0192] According to GB / T 31838.2-2019 Dielectric and Resistive Properties of Solid Insulating Materials, the release film on one side of the adhesive tapes that lose adhesion after power-on prepared in Examples 1-3 and Comparative Examples 1-6 was torn off, and the surface resistance of the corresponding adhesive surface was tested.

[0193] The test results are shown in Table 1.

[0194] 2. 180° peel force and reversibility test

[0195] According to GB / T 2792-2014 Test Method for Peel Strength of Adhesive Tapes, the adhesive tapes that lose adhesion after power-on prepared in Examples 1-3 and Comparative Examples 1-6 were tested before power-on: after the release film on one side of the prepared tapes was torn off, the tapes were bonded to a steel plate, and pressed back and forth with a 2kg rubber roller for 3 times, and placed at 23°C for 24 hours before testing, and the peeling force before power-on F1 was recorded. The adhesive tapes that lose adhesion after power-on prepared in Examples 1-3 and Comparative Examples 1-6 were tested for peeling force after power-on: after the release film on one side of the tapes was torn off, the tapes were bonded to a steel plate, and pressed back and forth with a 2kg rubber roller for 3 times, and placed at 23°C for 24 hours, the bonded samples were subjected to a power-on treatment of 10V×30s, and then the 180° peeling force was tested, and the peeling force after power-on F was recorded. The sample was reattached to a new steel plate, and pressed back and forth 3 times with a 2kg rubber roller. After being placed at 23°C for 24 hours, the re-bonding peeling force was tested and recorded as the re-bonding peeling force after power-on F2. The recovery ratio calculation formula is as follows:

[0196] Recovery ratio = (F2 / F1) × 100%;

[0197] F1—peeling force before power on;

[0198] F2—peeling force after power on;

[0199] The test results are shown in Table 1.

[0200] 3. Test of residual surface of steel plate after electrical stripping

[0201] Observe the surface contamination of the steel plate for the peeling force test after power is turned on to see if there is any oil stain or residual glue.

[0202] The test results are shown in Table 1.

[0203] 4. Shear strength test

[0204] According to GB / T 7124-2008 Determination of tensile shear strength of adhesives, the release films on one side of the adhesive tapes obtained in Examples 1-3 and Comparative Examples 1-6 were torn off and laminated to an aluminum plate substrate, and the release films on the other side were torn off and laminated to another aluminum plate with a lamination area of ​​12.5×25 mm. The shear force was tested after leaving for 20 minutes.

[0205] The test results are shown in Table 1.

[0206] V. Summary of Results and Conclusion

[0207]

[0208] As shown in Table 1, the adhesive tapes prepared in Examples 1-3 that lose adhesion after power on have higher shear strength and adhesion than those prepared in Comparative Examples 1-6, and the adhesive tapes that lose adhesion after power on have excellent recovery ability of adhesion during power on and re-bonding, and it is easier to peel off the substrate after power on. Compared with Examples 1-3, Comparative Example 1 did not prepare the CNC composite modified with octahedral ligands, but directly added carboxylated cellulose nanocrystals, which resulted in decreased adhesiveness of the tape and increased difficulty in power on peeling; Comparative Example 2 did not add isobornyl acrylate-hydroxypropyl acrylate copolymer, but directly used isobornyl acrylate, which resulted in decreased adhesiveness of the tape, increased difficulty in power on peeling, and decreased electrical response; Comparative Examples 3 and 4 did not add polydimethylsiloxane-polyethylene oxide block copolymer anti-precipitation agent, and did not use 1-ethyl-3- Methylimidazole bis(trifluoromethanesulfonyl)imide salt was used as the ion transmission medium, but 1-ethyl-3-methylimidazole bromide was used as the ion transmission medium, which resulted in electrolyte precipitation and increased oil stains after the tape was peeled off; Comparative Examples 5 and 6 did not add tetrahydrofuran acrylate monomer or use 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt, but used lithium bis(trifluoromethanesulfonyl)imide as the ion transmission medium, which resulted in decreased adhesion of the tape, increased difficulty in both energized and non-energized peeling, increased power loss and residual glue marks.

[0209] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0210] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0211] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. An adhesive tape that loses adhesion after being energized, comprising an adhesive layer and upper and lower release layers, wherein the adhesive layer is composed of an adhesive, and is characterized in that: The adhesive comprises the following raw material components by weight: 60-70 parts of acrylic copolymer main resin; 12-18 parts of 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt; 8-12 parts of dipole responsive acrylate monomer; 6.5-10 copies of the CNC complex modified with octahedral ligands; 20-30 parts of solvent; 6-10 parts of tackifying resin; 1-2 parts of anti-precipitation agent; Dispersant 0.9-1.5 parts; The preparation method of the octahedral ligand-modified CNC complex is as follows: The carboxylated cellulose nanocrystals were dispersed in tetrahydrofuran, homogenized by ultrasound for 30 min, 2,2-bipyridine-4,4-diol and p-toluenesulfonic acid were added, and the mixture was stirred at 60°C and 500 r / min for 5-8 h, centrifuged, precipitated, and washed to obtain bipyridine group-modified CNC, and the bipyridine group-modified CNC was dispersed in propylene glycol methyl ether acetate, ferric acetylacetonate was added, and the mixture was stirred at room temperature and 800 r / min for 12 h to obtain an octahedral ligand-modified CNC complex. The mass ratio of the carboxylated cellulose nanocrystals, 2,2-bipyridine-4,4-diol and ferric acetylacetonate is (4-6):(1.92-2.88):(0.6-1); the dosage ratio of the carboxylated cellulose nanocrystals, tetrahydrofuran and propylene glycol methyl ether acetate is 1g:40mL:10mL; the dosage of the p-toluenesulfonic acid is 0.1% of the total mass of the carboxylated cellulose nanocrystals, tetrahydrofuran and 2,2-bipyridine-4,4-diol.

2. The adhesive tape that loses adhesion after being energized according to claim 1, characterized in that: The main resin of the acrylic ester copolymer is isobornyl acrylate-hydroxypropyl acrylate copolymer, and the content of hydroxypropyl acrylate in the isobornyl acrylate-hydroxypropyl acrylate copolymer is 8-12%. The specific preparation steps are as follows: A1. In a nitrogen atmosphere, toluene, isobornyl acrylate, hydroxypropyl acrylate and a chain transfer agent were added into a four-necked flask in sequence, the temperature was raised to 65° C., and the mixture was stirred at a speed of 300 r / min; In the step A1, the chain transfer agent is n-dodecyl mercaptan; A2, dissolving the initiator in toluene to obtain an initiator solution, slowly adding the initiator solution dropwise into the four-necked flask of step A1 through a constant pressure dropping funnel within 1 hour, reacting at 65° C. with stirring for 4 hours, heating to 75° C. for 2 hours, and heating to 85° C. for 1 hour to obtain a mixed solution; In the step A2, the ratio of the initiator to toluene is 1 g:10 mL, and the initiator is azobisisobutyronitrile; the amount of the initiator is 0.5% of the total mass of isobornyl acrylate and hydroxypropyl acrylate; A3, the mixed solution was cooled to 40°C, an adsorbent was added and stirred for 30 minutes to obtain a crude solution, the crude solution was poured into n-hexane for precipitation, the precipitation was filtered and precipitated three times, and vacuum dried at 50°C for 24 hours to obtain a transparent elastic particle acrylate copolymer main resin; In step A3, the adsorbent is 97% diatomaceous earth and 3% activated carbon; the amount of the adsorbent is 2-3% of the total mass of the mixed solution; the volume ratio of the crude solution to n-hexane is 1:(9-11).

3. The adhesive tape that loses adhesion after being energized according to claim 2, characterized in that: In the step A1, the usage ratio of toluene, isobornyl acrylate, hydroxypropyl acrylate and chain transfer agent is (160-180) mL:70 g:30 g:0.1 g.

4. The adhesive tape that loses adhesion after being energized according to claim 1, characterized in that: The dipole-responsive acrylate monomer is a tetrahydrofuran acrylate monomer or an ethoxylated tetrahydrofuran acrylate monomer.

5. The adhesive tape that loses adhesion after being energized according to claim 1, characterized in that: The solvent is propylene glycol methyl ether acetate and tetrahydrofuran, and the mass ratio of propylene glycol methyl ether acetate to tetrahydrofuran is 7:

3.

6. The adhesive tape that loses adhesion after being energized according to claim 1, characterized in that: The tackifying resin is hydrogenated C9 petroleum resin.

7. The adhesive tape that loses adhesion after being energized according to claim 1, characterized in that: The anti-precipitation agent is a polydimethylsiloxane-polyethylene oxide block copolymer.

8. The adhesive tape that loses adhesion after being energized according to claim 1, characterized in that: The dispersant is polyoxyethylene lauryl ether or fluoroalkyl epoxy or its adduct.

9. A method for preparing an adhesive tape that loses adhesion after power-on according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Weigh and mix the main acrylate copolymer resin, dipole-responsive acrylate monomer, solvent and dispersant according to the ratio, add a photoinitiator, perform UV prepolymerization under nitrogen protection, add 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt, tackifying resin and anti-precipitation agent, heat to 50-55° C., use a high-speed shear emulsifier to react at a speed of 15000 r / min for 20-30 min, cool by 40-45° C., add the CNC composite modified with octahedral ligands, react at a speed of 300 r / min for 2-3 h, and prepare an adhesive; In the step S1, the photoinitiator is photoinitiator 819; the amount of the photoinitiator is 0.05-0.09% of the total mass of the acrylate copolymer main resin, the dipole-responsive acrylate monomer, the solvent and the dispersant; S2. Apply the adhesive to the plasma-treated PET release film I, dry it with hot air at 80°C for 3 minutes, attach the plasma-treated PET release film II to the other side of the adhesive layer, and perform secondary UV curing to obtain an adhesive tape that loses adhesion after power-on.

10. Application of the adhesive tape that loses adhesion after power-on according to any one of claims 1 to 8 in the fields of electronic components, smart packaging, reusable adhesive tape for metal use scenarios, and medical electrode patches.

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