NIR removable adhesive, NIR removable adhesive tape and preparation method thereof

Abstract

The invention discloses an NIR removable adhesive, an NIR removable adhesive tape and a preparation method of the NIR removable adhesive tape. The NIR removable adhesive comprises an acrylic prepolymer, a hybrid filler and a coupling agent which are uniformly mixed, the hybrid filler comprises a compound formed by polydopamine modified black phosphorene and graphene oxide, and the coupling agent is distributed at the interface of the hybrid filler and the acrylic prepolymer. According to the acrylic acid adhesive added with the polydopamine modified black phosphorene-graphene oxide hybrid filler, provided by the invention, the adhesive force of the adhesive can be rapidly and controllably reduced under the irradiation of near-infrared light, and meanwhile, the adhesive has high thermal conductivity and flame retardance; the method is very suitable for electronic device repair, medical dressings, flexible electronics and other scenes needing precise stripping.

Description

Technical Field

[0001] This invention relates to the field of functional adhesives, and more particularly to an NIR removable adhesive, an NIR removable tape, and a method for preparing the same. Background Technology

[0002] Removable tape is a type of adhesive tape with special bonding properties. It can be easily removed under certain conditions without damaging the adhered object. This type of tape is widely used in packaging, electronics, automotive, medical, construction, and many other fields. In the removable tape market, hot melt tape dominates, holding a market share of over 60%. However, it suffers from drawbacks such as high cost, low peel strength, odor and toxicity, and flammability. Traditional removable tapes require mechanical force, high temperatures, or solvent treatment for peeling, which can easily damage the substrate or leave adhesive residue.

[0003] To address the aforementioned shortcomings, photoresponsive removable tapes (or other forms of adhesive applications) have emerged in the field, particularly those utilizing the photothermal effect to achieve thermal de-adhesion and removal by heating specific components with light. Existing photothermal responsive adhesive solutions largely rely on materials such as gold nanorods and carbon nanotubes to achieve the photothermal effect, but this approach suffers from high cost, low photothermal efficiency, or poor biocompatibility.

[0004] Although black phosphorus (BP) has excellent photothermal properties, it is easily oxidized and difficult to disperse. When used alone as a photothermal material in adhesives, its stability is insufficient. There is no precedent in the field for using black phosphorus to achieve better photothermal removable adhesives. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide an NIR removable adhesive, an NIR removable tape, and a method for preparing the same.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this invention includes:

[0007] In a first aspect, the present invention provides a hybrid filler having a multi-layer core-shell structure, wherein the multi-layer core-shell structure comprises, from the inside out, a core composed of at least black phosphorus, an intermediate encapsulation layer composed of at least polydopamine, and an outer layer composed of at least graphene oxide.

[0008] The graphene oxide and polydopamine are connected by peptide bonds or π-π stacking.

[0009] Secondly, the present invention also provides a method for preparing a hybrid filler, comprising:

[0010] Provides a buffered dispersion of graphene oxide with carboxyl groups on its surface;

[0011] An activator is added to the buffer dispersion to activate the carboxyl groups;

[0012] Polydopamine-modified black phosphorus nanosheets encapsulated with polydopamine are added to the buffer dispersion, resulting in a peptide reaction or π-π stacking between activated carboxyl-amine groups, forming a multilayer core-shell structure of graphene oxide-polydopamine-black phosphorus, thus obtaining a hybrid filler.

[0013] Thirdly, the present invention also provides a NIR removable adhesive comprising a uniformly mixed acrylic prepolymer, a hybrid filler, and a coupling agent;

[0014] The coupling agent is distributed at the interface between the hybrid filler and the acrylic prepolymer.

[0015] Fourthly, the present invention also provides a method for preparing the above-mentioned NIR removable adhesive, comprising:

[0016] The solution of the hybrid filler, coupling agent, and acrylic prepolymer is sheared and mixed to obtain the NIR removable adhesive.

[0017] Fifthly, the present invention also provides a NIR removable tape comprising a base film and the aforementioned NIR removable adhesive covering the surface of the base film.

[0018] Based on the above technical solution, compared with the prior art, the beneficial effects of the present invention include at least the following:

[0019] The present invention provides an acrylic adhesive with polydopamine-modified black phosphorus-graphene oxide hybrid filler. This adhesive can achieve rapid and controllable decrease in adhesion under near-infrared light (NIR, wavelength, for example, 808nm) irradiation, while also taking into account high thermal conductivity and flame retardancy. It is very suitable for scenarios that require precise peeling, such as electronic device repair, medical dressings, and flexible electronics.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to enable those skilled in the art to better understand the technical means of this application and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described below. Detailed Implementation

[0021] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The following will further explain and illustrate this technical solution, its implementation process, and its principles.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0023] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component or method step from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components or method steps.

[0024] The present invention first provides a hybrid filler having a multi-layer core-shell structure, wherein the multi-layer core-shell structure comprises, from the inside out, a core composed of at least black phosphorus, an intermediate encapsulation layer composed of at least polydopamine, and an outer layer composed of at least graphene oxide; the graphene oxide and polydopamine are connected by peptide bonds or π-π stacking.

[0025] In some implementations, the thickness of the intermediate encapsulation layer is 2-5 nm.

[0026] In some embodiments, the mass ratio of black phosphorus to graphene oxide in the hybrid filler is 1:(1-3).

[0027] In some embodiments, the mass ratio of polydopamine to black phosphorus in the hybrid filler is 10-20%.

[0028] Specifically, the hybrid filler provided by this invention forms a multi-layer core-shell structure: BP nanosheets are the core, and the surface is covered with a PDA layer (PDA@BP) of about 2-5 nm. GO sheets and PDA@BP are stacked in an alternating manner or bonded at the edges to form a GO-PDA-BP sandwich structure.

[0029] This invention also provides a method for preparing the above-mentioned hybrid filler, which includes the following steps:

[0030] Provides a buffered dispersion of graphene oxide with carboxyl groups on its surface;

[0031] An activator is added to the buffer dispersion to activate the carboxyl groups;

[0032] Polydopamine-modified black phosphorus nanosheets encapsulated with polydopamine are added to the buffer dispersion, resulting in a peptide reaction or π-π stacking between activated carboxyl-amine groups, forming a multilayer core-shell structure of graphene oxide-polydopamine-black phosphorus, thus obtaining a hybrid filler.

[0033] In some embodiments, the pH of the buffer dispersion is 5-6.

[0034] In some embodiments, the concentration of graphene oxide in the buffer dispersion is 0.05-0.2 mol / L.

[0035] In some embodiments, the mass ratio of black phosphorus to graphene oxide in polydopamine-modified black phosphorus is 1:(1-3).

[0036] In some embodiments, the peptide formation reaction is carried out at a temperature of 20-35°C for a reaction time of more than 12 hours.

[0037] In some embodiments, the activator is selected from a combination of EDC and NHS, wherein the amount of EDC added is 1.5-3 times the total molar amount of carboxyl groups in the graphene oxide, and the amount of NHS added is 0.8-1.2 times the amount of EDC added.

[0038] As a typical example of the above preparation method, the preparation process of this hybrid filler may include the following steps:

[0039] 1. GO dispersion: Disperse GO in MES buffer (concentration 0.1M, pH=5-6, preferably pH=5.5), sonicate in a 600W water bath for 2 hours, and control the temperature at 23±5℃ (1g GO added to 50ml MES).

[0040] 2. EDC / NHS activation: Add EDC and NHS, and stir at room temperature for 2 hours.

[0041] 3. PDA@BP introduction: Add PDA@BP (at a mass ratio of BP:GO = 1:2) and continue the reaction for 12 hours (protected from light and under nitrogen protection).

[0042] 4. Purification: Centrifuge and wash (ethanol / water) to remove unreacted EDC / NHS.

[0043] In the above preparation process, the molar ratio of carboxyl groups of added EDC to GO is 1.5:1 to 3:1, the molar ratio of NHS to EDC is 1:1, the reaction pH is 5.0-6.0, and the time is ≥12 hours.

[0044] This invention provides a NIR removable adhesive comprising a uniformly mixed acrylic prepolymer, a hybrid filler, and a coupling agent; the hybrid filler comprises a composite formed by polydopamine-modified black phosphorus and graphene oxide, and the coupling agent is distributed at the interface between the hybrid filler and the acrylic prepolymer.

[0045] Both BP and GO are excellent fillers, but when used alone as fillers to achieve photothermal de-sticking, they often encounter many problems. Specifically, BP is prone to oxidation, and GO is prone to agglomeration, so neither can achieve good results when used alone. This invention adds PAD to improve filler dispersibility, oxidation resistance, photothermal conversion efficiency, and thermal conductivity through covalent bonds or π-π stacking. The composite of black phosphorus (BP) and graphene oxide (GO) can construct a highly efficient and multifunctional filler system, combining the advantages of both while compensating for the shortcomings of single materials. This is mainly reflected in the three-dimensional thermally conductive network formed by PDA@BP-GO, whose thermal conductivity can reach 5-20 W / m·K, far exceeding that of any single material. BP's self-flame-retardant properties compensate for graphene's high thermal conductivity but lack of flame retardancy, while graphene's high mechanical strength compensates for BP's flexibility but fragility, improving the tape's mechanical stability. BP has a high light absorption coefficient at 808 nm (~3.5 × 10⁻⁶). 4 L / (g·cm) converts light energy into heat energy, with local temperature rise reaching 80-120℃, providing an instantaneous high temperature point. The heat is transferred to the acrylate polymer chains, intensifying the movement of molecular chain segments and reducing the cohesive force and interfacial adhesion energy of the adhesive layer. The high thermal conductivity of GO (~2000W / m·K in-plane) rapidly transfers the heat generated by BP laterally, expanding the softening area, while preventing excessive temperature around BP from causing carbonization of the adhesive layer or damage to the substrate. It forms a thermally conductive network, ensuring uniform heating of the adhesive layer and a rapid decrease in peel force. At the same time, the thermal decomposition of BP generates PO· free radicals and a phosphate glass layer, isolating oxygen. GO promotes char formation at high temperatures, and together with the decomposition products of PDA, they form a dense protective layer, ensuring that the adhesive layer reduces tack while preventing combustion.

[0046] Regarding the specific adhesive ratio, the inventors of this invention have summarized a more appropriate range of component ratios through long-term practice. That is, in some embodiments, the mass ratio of the acrylic prepolymer (based on the total weight of monomers), hybrid filler, and coupling agent is (83-118):(1-5):(0.5-2).

[0047] In addition, in some embodiments, the NIR removable adhesive may further include a tackifying resin, wherein the mass ratio of the acrylic prepolymer to the tackifying resin is (83-118):(5-10).

[0048] In some embodiments, the acrylic prepolymer is formed by polymerization of acrylate monomers, the acrylate monomers comprising 60-80 parts by weight of 2-ethylhexyl acrylate, 20-30 parts by weight of butyl acrylate, 2-5 parts by weight of acrylic acid, and 1-3 parts by weight of hydroxyethyl methacrylate.

[0049] As a typical example of the above technical solutions, embodiments of the present invention provide a near-infrared light-triggered removable acrylic pressure-sensitive adhesive, which comprises the following components:

[0050] Acrylic ester prepolymer: polymerized from 2-ethylhexyl acrylate (2-EHA, 60-80 parts), butyl acrylate (BA, 20-30 parts), acrylic acid (AA, 2-5 parts), and hydroxyethyl methacrylate (HEMA, 1-3 parts); black phosphorus-graphene oxide hybrid filler: 1-5 parts, wherein the mass ratio of black phosphorus to graphene oxide is 1:1 to 1:3; polydopamine coating layer: accounting for 10-20% of the mass of black phosphorus; silane coupling agent: 0.5-2 parts; tackifying resin: 5-10 parts.

[0051] The above specific embodiments mainly take pressure-sensitive acrylic adhesives as examples, and their main application is the preparation of pressure-sensitive tapes. However, the scope of implementation of the present invention is not limited to this. The pressure-sensitive components can be replaced with other methods. The component formulation of the adhesive itself only needs to have good responsiveness to the subsequent temperature-induced tack reduction effect.

[0052] A second aspect of the present invention also provides a method for preparing the NIR removable adhesive provided in any of the above embodiments, comprising the following steps:

[0053] The hybrid filler, coupling agent, and acrylic prepolymer solution provided by the above technical solution are sheared and mixed to obtain NIR removable adhesive.

[0054] In some embodiments, the preparation method may specifically include the following preparation process of polydopamine-modified black phosphorus:

[0055] The polymerization reaction was carried out by dissolving the black phosphorus and dopamine hydrochloride in Tris-HCl solution to obtain a dispersion containing the polydopamine-modified black phosphorus, and the solid polydopamine-modified black phosphorus was separated from the dispersion.

[0056] As a typical example, the preparation process of the above-mentioned polydopamine-modified black phosphorus-graphene oxide composite may include:

[0057] 1. Disperse BP nanosheets (thickness <10nm) in Tris-HCl buffer (10mM, pH=8.5) and sonicate for 30 minutes (200W probe sonication, amplitude 20-40%, ice bath conditions, pulse mode: 2 seconds on / 1 second off);

[0058] 2. Add dopamine hydrochloride (0.2 mg / mL) and stir at room temperature for 24 hours (protected from light and under nitrogen protection);

[0059] 3. Centrifuge and wash (with deionized water / ethanol), then vacuum dry at 60°C to obtain PDA@BP.

[0060] Of course, this invention exemplifies the process of making polydopamine-modified black phosphorus, but in practical applications, polydopamine-modified black phosphorus products can also be obtained commercially, without being limited to self-production. Furthermore, even if self-production is used, the specific polydopamine modification process conditions are not limited to the scope of this invention's example, as long as the modified product with the same microstructure as described above can be obtained.

[0061] In some embodiments, the preparation method may further include the step of selectively removing the solvent.

[0062] A third aspect of the present invention also provides an NIR removable tape comprising a base film and an NIR removable adhesive provided in any of the above embodiments covering the surface of the base film.

[0063] An exemplary method for preparing the NIR removable tape includes:

[0064] 1) Synthesis of acrylate prepolymer: The monomer and solvent are mixed and polymerization is initiated at 70°C for 6 hours under nitrogen protection;

[0065] 2) Preparation of PDA@BP-GO hybrid packing material;

[0066] 3) Add hybrid fillers and silane coupling agents to the prepolymer and disperse them under high-speed shear;

[0067] 4) Coat the substrate, dry at 80°C, and then heat-treat at 120°C for 10 minutes.

[0068] The tape is irradiated with 808nm near-infrared light (1-2W / cm). 2 Within 10 seconds, the peeling force decreases by ≥80%, and the residual adhesive rate after peeling is <3%.

[0069] The technical solution of the present invention will be further described in detail below through several embodiments. However, the selected embodiments are only used to illustrate the present invention and do not limit the scope of the present invention.

[0070] Example 1

[0071] This embodiment illustrates the preparation process of an acrylic pressure-sensitive tape with NIR removable properties, as detailed below:

[0072] 1. Prepolymer preparation:

[0073] 2-EHA (70 parts), BA (25 parts), AA (3 parts), and HEMA (2 parts) were dissolved in ethyl acetate, and AIBN (0.3 parts) was added. The mixture was reacted at 70°C for 6 hours. Of course, this example exemplifies the use of a self-made method to obtain the prepolymer, but practical methods are not limited to this; commercially available prepolymers with similar molecular properties and functions can also be used.

[0074] 2. PDA@BP-GO preparation:

[0075] BP nanosheets (1 part, thickness <10 nm) were reacted with dopamine hydrochloride (0.2 mg / mL) in Tris-HCl for 24 hours to obtain PDA@BP;

[0076] Disperse GO (2 parts, C / O ratio 1.8-2.2, 2-5 layers, metal impurity content <50ppm) in MES (0.1M concentration, pH 5-6, preferably pH 5.5) buffer solution, and sonicate in a 600W water bath for 2 hours, with the temperature controlled at 23±5℃. (1g GO added to 50ml MES).

[0077] 2. EDC / NHS activation: Add EDC and NHS, stir at room temperature for 2 hours, the molar ratio of carboxyl groups of added EDC to GO is 2:1, and the molar ratio of NHS to EDC is 1:1; the reaction pH is 5.0-6.0, and the reaction time is 12 hours.

[0078] 3. PDA@BP introduction: Add PDA@BP (at a mass ratio of BP:GO = 1:2) and continue the reaction for 12 hours (protected from light and under nitrogen protection).

[0079] 4. Purification: Centrifuge and wash (ethanol / water) to remove unreacted EDC / NHS.

[0080] 3. Preparation of adhesive solution:

[0081] Add PDA@BP-GO and KH-550 (1 part) to the prepolymer, disperse, and then add petroleum resin (8 parts, hydrogenated C5 petroleum resin with a softening point of 90-110℃ and Gardner color <2, such as Escore 5600 or Eastotac H-100).

[0082] 4. Performance Testing:

[0083] The thermal conductivity was measured using the laser flare method, and the result was 2.1 W / m·K; simultaneously, an 808 nm NIR laser was used with a power of 1.5 W / cm². 2 The peel force was measured before and after 10 seconds of irradiation, and the result decreased from 10 N / cm before irradiation to 1.8 N / cm (ASTM D3330).

[0084] Comparative Example 1

[0085] This comparative example is largely the same as Example 1, with the main difference being:

[0086] In step 2, the step of ultrasonically mixing PDA@BP and GO is omitted. In step 3, an equal amount of PDA@BP (using equal mass parts of PDA@BP-GO in Example 1) is directly used as filler to prepare the adhesive.

[0087] The NIR tack reduction performance tests of this comparative example are shown in Table 1 below. This adhesive exhibits poor thermal conductivity and a slow NIR response (low temperature rise rate). Localized heat accumulation leads to carbonization of the adhesive layer. This is due to the lack of a thermally conductive network in GO, preventing the rapid dissipation of heat generated by BP and reducing photothermal efficiency. Furthermore, it was observed that the adhesive layer is prone to ablation pits (local temperature >150°C), resulting in higher levels of adhesive residue. The adhesive provided in Example 1, however, does not exhibit this phenomenon.

[0088] Comparative Example 2

[0089] This comparative example is largely the same as Example 1, with the main difference being:

[0090] Step 2 is omitted, and in step 3, an equal amount of GO is used directly as filler to prepare the adhesive solution.

[0091] The adhesive provided in this comparative example has no photothermal activity and is only used as a common filler. It cannot achieve temperature response and the peel strength does not decrease after irradiation.

[0092] Comparative Example 3

[0093] This comparative example is largely the same as Example 1, with the main difference being:

[0094] In step 2, the process of reacting BP nanosheets (1 part) with dopamine hydrochloride (0.2 mg / mL) in Tris-HCl for 24 hours was omitted. Instead, the same mass of BP and GO as in Example 1 was directly ultrasonically mixed to obtain BP-GO filler as the filler in step 3.

[0095] In the adhesive provided in this comparative example, BP oxidizes, its photothermal properties degrade, and the filler particle size increases over time (agglomeration). The lack of PDA leads to rapid oxidation of BP (performance failure after 7 days), filler agglomeration (poor dispersibility), weak interfacial bonding (residual adhesive rate >15%), and the BP-GO interface is not chemically bonded, resulting in poor hybridization.

[0096] Comparative Example 4

[0097] This comparative example is largely the same as Example 1, with the main difference being:

[0098] In step 2, the ultrasonic mixing of PDA@BP and GO is omitted. Equal amounts of PDA@BP and GO are added to the adhesive in step 3 as two separate fillers and then sheared and mixed.

[0099] The adhesive provided in this comparative example retains NIR responsiveness but is inefficient (peel force reduced by 50%), has filler settling (poor storage stability), lacks covalent bonds, has discontinuous heat transfer paths, and is easily peeled off at the interface.

[0100] Table 1. Comparative test results of the NIR tack reduction properties of multiple adhesives provided in the examples and comparative examples.

[0101]

[0102] Example 2

[0103] This embodiment is largely the same as Embodiment 1, with the main difference being:

[0104] Adjust the mass fractions of each component to be 2-EHA (80 parts), BA (30 parts), AA (5 parts), HEMA (3 parts), BP nanosheets (5 parts), GO (5 parts), KH-550 (2 parts), and petroleum resin (10 parts).

[0105] Example 3

[0106] This embodiment is largely the same as Embodiment 1, with the main difference being:

[0107] Adjust the mass fractions of each component to be 2-EHA (60 parts), BA (20 parts), AA (2 parts), HEMA (1 part), BP nanosheets (1 part), GO (3 parts), KH-550 (2 parts), and petroleum resin (5 parts).

[0108] Examples 2-3 above can all produce NIR removable acrylic tapes similar to those in Example 1.

[0109] The above embodiments, by employing black phosphorus-graphene hybrid fillers, synergistically improve photothermal conversion efficiency and colloidal stability, achieving near-infrared light (NIR) triggered rapid de-adhesion (peel force decreases by ≥80% within 10 seconds) with no peeling residue, while also taking into account high thermal conductivity (1.5-3.0 W / m·K) and flame retardancy (UL94V-0).

[0110] It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hybrid packing material, characterized in that, The hybrid filler has a multi-layer core-shell structure, which, from the inside out, includes a core composed of at least black phosphorus, an intermediate encapsulation layer composed of at least polydopamine, and an outer layer composed of at least graphene oxide. The graphene oxide and polydopamine are connected by peptide bonds or π-π stacking.

2. The hybrid packing material according to claim 1, characterized in that, The thickness of the intermediate encapsulation layer is 2-5 nm; And / or, the mass ratio of black phosphorus to graphene oxide in the hybrid filler is 1:(1-3); And / or, the mass ratio of polydopamine to black phosphorus in the hybrid filler is 10-20%.

3. A method for preparing a hybrid filler, characterized in that, include: Provides a buffered dispersion of graphene oxide with carboxyl groups on its surface; An activator is added to the buffer dispersion to activate the carboxyl groups; Polydopamine-modified black phosphorus nanosheets encapsulated with polydopamine are added to the buffer dispersion, resulting in a peptide reaction or π-π stacking between activated carboxyl-amine groups, forming a multilayer core-shell structure of graphene oxide-polydopamine-black phosphorus, thus obtaining a hybrid filler.

4. The preparation method according to claim 3, characterized in that, The pH value of the buffer dispersion is 5-6; And / or, the concentration of graphene oxide in the buffer dispersion is 0.05-0.2 mol / L; And / or, the mass ratio of black phosphorus to graphene oxide in polydopamine-modified black phosphorus is 1:(1-3); And / or, the peptide formation reaction is carried out at a temperature of 20-35°C for a reaction time of more than 12 hours.

5. The preparation method according to claim 3, characterized in that, The activator is selected from a combination of EDC and NHS, wherein the amount of EDC added is 1.5-3 times the total molar amount of carboxyl groups in the graphene oxide, and the amount of NHS added is 0.8-1.2 times the amount of EDC added.

6. A NIR removable adhesive, characterized in that, The mixture comprises a uniformly mixed acrylic prepolymer, a hybrid filler as described in any one of claims 1-2, and a coupling agent, wherein the coupling agent is distributed at the interface between the hybrid filler and the acrylic prepolymer.

7. The NIR removable adhesive according to claim 6, characterized in that, The mass ratio of the acrylic prepolymer, hybrid filler, and coupling agent is (83-118):(1-5):(0.5-2); And / or, the NIR removable adhesive further includes a tackifying resin, wherein the mass ratio of the acrylic prepolymer to the tackifying resin is (83-118):(5-10); And / or, the acrylic prepolymer is formed by polymerization of acrylate monomers, wherein the acrylate monomers include 60-80 parts by weight of 2-ethylhexyl acrylate, 20-30 parts by weight of butyl acrylate, 2-5 parts by weight of acrylic acid, and 1-3 parts by weight of hydroxyethyl methacrylate.

8. A method for preparing the NIR removable adhesive according to any one of claims 6-7, characterized in that, include: The solution of hybrid filler, coupling agent and acrylic prepolymer is sheared and mixed to obtain NIR removable adhesive.

9. The preparation method according to claim 8, characterized in that, Specifically include: Black phosphorus and dopamine hydrochloride were dissolved in Tris-HCl solution to carry out a polymerization reaction to obtain a dispersion containing the polydopamine-modified black phosphorus. Solid polydopamine-modified black phosphorus was then separated from the dispersion. And / or, the preparation method further includes the step of selectively removing the solvent.

10. A removable NIR tape, characterized in that, Includes a base film and the NIR removable adhesive of any one of claims 6-7 covering the surface of the base film.

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