CN116178608A - Method for preparing two-dimensional copolymer by utilizing hydrogen bond induction assembly - Google Patents

Abstract

The invention relates to the technical field of preparation of two-dimensional polymer materials, in particular to a method for preparing a two-dimensional copolymer by utilizing hydrogen bond induction assembly, which comprises the following steps: the amphiphilic monomer containing the hydrogen bond donor/acceptor structure is co-assembled with the common amphiphilic monomer without the hydrogen bond donor/acceptor structure: adding an amphiphilic monomer containing a hydrogen bond donor/acceptor structure into deionized water, adding alkali, oscillating to dissolve the amphiphilic monomer, adding a common amphiphilic monomer without the hydrogen bond donor/acceptor structure, uniformly mixing, and standing to form a two-dimensional supermolecule solution; and adding an initiator into the two-dimensional supermolecule solution, and performing in-situ free radical polymerization at 70 ℃ after three rounds of oxygen removal and nitrogen gas introduction operations to obtain the two-dimensional copolymer. The invention is that the action of the self hydrogen bond of the amphiphilic monomer containing the hydrogen bond supply/receptor structure can induce the common amphiphilic monomer without the hydrogen bond supply/receptor structure to orient so as to form a two-dimensional supermolecule, and then the two-dimensional supermolecule is polymerized in situ to form a two-dimensional copolymer.

Description

A method for preparing two-dimensional copolymers using hydrogen bond-induced assembly

technical field

The invention relates to the technical field of preparation of two-dimensional polymer materials, in particular to a method for preparing two-dimensional copolymers by using hydrogen bond-induced assembly.

Background technique

Over the past decade, we have witnessed the rapid development of a unique class of synthetic polymers, two-dimensional polymers with atomically or molecularly thick independent covalent Orientation is formed by covalent bonds. Due to their large specific surface area, light weight, high structural controllability, and abundant chemical active sites, they have potential applications in electronics, biomedicine, catalytic sensing, and as separation and filtration membranes. However, the current methods for preparing two-dimensional copolymers are still immature, and there is still a long way to go before real commercial applications.

The preparation methods of two-dimensional copolymer materials in the prior art mainly include three kinds: top-down exfoliation method, bottom-up interface method and solution direct synthesis method. The top-down exfoliation method is to use some means to destroy the weak interaction between the three-dimensional material layers with a regular structure and obtain a two-dimensional material with a regular structure. For example in Berlanga, I.; Ruiz-González, M.L.; González-Calbet, J.M.; Fierro, J.L.G.; Mas-Ballesté, R.; In this paper, the authors disperse boronate-linked COF-8 in pure dichloromethane and sonicate to obtain thin-layer nanosheets with a thickness of 4-10 nm. The advantage of this method is that the obtained two-dimensional materials have regular and clear structures, which are easy to characterize. However, the thickness and size of 2D materials are uncontrollable using this method, and defects are inevitable during the exfoliation process.

The bottom-up interface method is to limit the polymerization reaction to an artificially provided interface, so that the reaction can only be carried out on a two-dimensional plane. For example in Matsuoka, R.; Sakamoto, R.; Hoshiko, K.; Sasaki, S.; Masunaga, H.; .J.Am.Chem.Soc.2017,139,3145-3152 In the article, the author successfully prepared two-dimensional graphyne at the interface of two immiscible solvents. Linked catalyst, the lower dichloromethane layer contains hexaethynylbenzene monomer. Under an inert atmosphere at room temperature, the catalytic coupling reaction continued for 24 h to grow a two-dimensional covalent network and generate multilayer graphene films at the liquid-liquid interface. However, it is still a challenge to prepare large-scale 2D copolymers through interface-assisted methods due to the limited interface area.

The solution direct synthesis method means that monolayer or oligolayer two-dimensional copolymers can be directly synthesized in solution without external assistance. In this method, monomer molecules self-assemble in a solvent to form a two-dimensional structure through intermolecular non-covalent forces such as π-π stacking, hydrogen bonding, hydrophilicity and hydrophobicity, and electrostatic repulsion, and then in situ free radical polymerization to form a two-dimensional structure. dimensional covalent copolymers. The two-dimensional copolymer prepared by this method does not need to be peeled off and has a large yield, but it still has certain requirements for the structural design of monomer molecules.

The name is a method for preparing two-dimensional polymers based on hydrogen bonding (the publication number is CN114591457A), which discloses that amphiphilic monomers containing hydrogen bond donors/acceptors are self-assembled in aqueous solution to form two-dimensional supramolecules. Two-dimensional polymers are obtained by radical polymerization in the confined space of two-dimensional supramolecules. It is disclosed in its specification that 3,5-diacryloyloxybenzoic acid cannot spontaneously form a two-dimensional supramolecular and then obtain a two-dimensional polymer, indicating that hydrogen bonding is crucial for guiding assembly to form a two-dimensional structure. It can be concluded that common amphiphilic monomers cannot form two-dimensional structures by themselves during polymerization.

Contents of the invention

The technical problem to be solved by the present invention is how to provide a method suitable for preparing two-dimensional copolymers from ordinary amphiphilic monomers.

The present invention realizes solving above-mentioned technical problem by following technical means:

One aspect of the present invention provides a method for preparing a two-dimensional copolymer using hydrogen bond-induced assembly, comprising the following steps:

(1) Co-assembly of amphiphilic monomers containing hydrogen bond donor or acceptor structures with common amphiphilic monomers: add amphiphilic monomers containing hydrogen bond donor or acceptor structures to deionized water, and then add organic Alkali or inorganic base, shake to dissolve, then add ordinary amphiphilic monomers and mix evenly, let it stand for a period of time, and then form a two-dimensional supramolecular solution;

(2) Polymerization reaction: a free radical initiator is added to the two-dimensional supramolecular solution, and after three rounds of deoxygenation and nitrogen gas operation, in-situ free radical polymerization is carried out at a certain temperature to obtain a two-dimensional copolymer.

Beneficial effects: the present invention disperses amphiphilic monomers containing hydrogen bond donor or acceptor structures and ordinary amphiphilic monomers together in a solvent, and through the amphiphilic monomers containing hydrogen bond donor or acceptor structures The hydrogen bond force induces the orientation of ordinary amphiphilic monomers that cannot form a two-dimensional structure to assemble into sheets, and then adds an initiator to initiate free radical polymerization of the double bonds in the hydrophobic layer in situ to prepare a two-dimensional copolymer.

Preferably, the standing time is 1-2h; the temperature is 60-80°C.

Preferably, the amphiphilic monomer structure containing a hydrogen bond donor or acceptor structure contains a monomer with a benzene ring and two double bonds.

Preferably, the general amphiphilic monomer structural formula is:

Preferably, the co-assembly includes the following steps: Weigh 1-10 parts of amphiphilic monomers containing hydrogen bond donor or acceptor structures into a polymerization bottle, add 5-50 parts of solvent, and ultrasonically disperse; then add 1- Put 10 parts of organic base or inorganic base into the polymerization bottle, shake well to get a transparent solution; then weigh 10-100 parts of ordinary amphiphilic monomer and add 5-50 parts of solvent to shake to dissolve, and mix the two solutions evenly , standing at room temperature for 1-2 hours to obtain a co-assembled supramolecular solution.

Preferably, the organic base is one of 1,1,3,3-tetramethylguanidine and triethylamine; the inorganic base is one of sodium hydroxide and potassium hydroxide; the solvent is Deionized water.

Preferably, the in-situ radical polymerization reaction comprises the following steps: freezing the two-dimensional supramolecular solution with liquid nitrogen to extract air, then thawing and filling with nitrogen, repeating the operation three times; then weighing 2-4 Put % parts of the initiator into the polymerization bottle and polymerize at 60-80°C for 12-24h; then pour the copolymer solution into a dialysis bag and dialyze with deionized water for 24-48h, changing the water 8-12 times during the period.

Preferably, the initiator is one of a water-soluble initiator or an oil-soluble initiator. If the solvent used is a water-soluble solvent, use a water-soluble initiator; if the solvent used is not a water-soluble solvent, use an oil-soluble initiator.

More preferably, the water-soluble initiator includes one of potassium persulfate or ammonium persulfate; the oil-soluble initiator includes azobisisobutyronitrile, azobisisoheptanonitrile, dibenzoyl peroxide one of a kind.

Another aspect of the present invention provides the two-dimensional copolymer prepared by the above method.

The advantages of the present invention are:

1. The present invention is to disperse the amphiphilic monomer containing the hydrogen bond donor or acceptor structure and the common amphiphilic monomer in the solvent together, through the hydrogen of the amphiphilic monomer containing the hydrogen bond donor or acceptor structure The bond force induces the orientation of ordinary amphiphilic monomers that cannot form a two-dimensional structure to assemble into sheets, and then adds an initiator to initiate free radical polymerization of the double bonds in the hydrophobic layer in situ to prepare a two-dimensional copolymer thing.

2. Through the present invention, many common amphiphilic monomers that cannot form sheets by themselves can be prepared into two-dimensional copolymers without stripping operation, and the synthesis method is simple and the yield is abundant; and no toxic and harmful reagents are involved in the preparation process The use does not require harsh experimental conditions, which is conducive to green and sustainable development.

3. The method of the present invention to prepare common amphiphilic monomers into two-dimensional copolymers through hydrogen bond-induced assembly can be prepared into high value-added products according to the difference in functional groups of common amphiphilic monomers, which can improve mechanical or electrical properties.

Description of drawings

Fig. 1 is the hydrogen nuclear magnetic resonance spectrum ( ^1HNMR ) figure of the amphiphilic monomer DBA containing hydrogen bond donor or acceptor structure in the present invention;

Fig. 2 is DBA and sodium p-styrene sulfonate copolymerization proton nuclear magnetic resonance spectrum ( ¹ HNMR) figure in the embodiment 1 of the present invention;

Fig. 3 is the transmission electron microscope (TEM) figure of DBA and sodium p-styrene sulfonate copolymerization in the embodiment of the present invention 1;

Fig. 4 is DBA and sodium p-styrene sulfonate copolymerized optical microscope (OM) figure in the embodiment of the present invention 1;

Fig. 5 is DBA and sodium p-styrene sulfonate copolymerized atomic force microscope (AFM) figure in the embodiment of the present invention 1;

Fig. 6 is DBA and sodium p-styrene sulfonate copolymerization membrane mechanical property (tensile) test figure in the embodiment of the present invention 1;

Fig. 7 is a scanning electron microscope (SEM) figure of ABA and sodium p-styrene sulfonate copolymerization in comparative example 1 of the present invention;

Fig. 8 is the DBA and 4-vinyl benzoic acid copolymerization proton nuclear magnetic resonance spectrum ( ¹ HNMR) figure in the embodiment 2 of the present invention;

Fig. 9 is an optical microscope (OM) picture of the copolymerization of DBA and 4-vinylbenzoic acid in Example 2 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The test materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

Those that do not indicate specific techniques or conditions in the examples can be carried out according to the techniques or conditions described in the documents in this field or according to the product instructions.

In Examples 1-4 of the present application, the hydrogen bonding of the amphiphilic monomer 3,5-diacrylamidobenzoic acid (DBA) containing a hydrogen bond donor or acceptor structure is used to induce the orientation of common amphiphilic monomers A method of assembling and in-situ polymerizing into a two-dimensional copolymer, but the amphiphilic monomer containing a hydrogen bond donor or acceptor structure is not limited to the DBA of the embodiment of the application, and can also be other hydrogen bond donor or acceptor structures amphiphilic monomer.

Preparation of Amphiphilic Monomer 3,5-Diacrylamidobenzoic Acid (DBA) Containing Hydrogen Bond Donor or Acceptor Structure

Weigh 3,5 diaminobenzoic acid (2.00g, 13.14mmol) into the reaction flask, add 50mL of ethyl acetate, then weigh potassium carbonate (36.32g, 262.80mmol) and dissolve it in 50mL of deionized water. The mixture was stirred in an ice bath for 0.5 h, and then acryloyl chloride (4.76 g, 52.56 mmol) was slowly added dropwise. After the addition was complete, the ice bath was removed, and stirring was continued at room temperature for 4 h. After the reaction, separate the liquid to remove the organic layer, acidify the remaining aqueous solution, that is, a large amount of precipitation is formed, extract the solid with ethyl acetate and then spin the solvent, rinse the obtained solid with deionized water, and then put it in a vacuum drying oven The target small molecule DBA was obtained by drying in medium for 24 hours. Its H NMR spectrum is shown in Figure 1. The method used in the present invention to prepare DBA is not limited to using other methods to prepare DBA.

Example 1

A method for preparing a two-dimensional copolymer using hydrogen bond-induced assembly, specifically comprising the following steps:

(1) Preparation of two-dimensional supramolecular solutions

Weigh DBA (200mg, 0.77mmol, ten parts) into 50mL of deionized water and ultrasonically disperse for 20min to obtain a gray-purple suspension, then add (88.7mg, 0.77mmol, ten parts) organic base 1,1 to the suspension , 3,3 Tetramethylguanidine, the gray-purple suspension was immediately clear and transparent, weighed sodium p-styrenesulfonate (1.58g, 7.7mmol, one hundred parts) and added it to 50mL deionized water, dissolved it and mixed it with DBA solution evenly , standing at room temperature for 1 hour, the two-dimensional supramolecular solution can be obtained.

(2) Preparation of two-dimensional copolymers

Using potassium persulfate as an initiator, the two-dimensional supramolecular solution was frozen with liquid nitrogen to remove the air, then thawed and filled with nitrogen, and the operation was repeated three times. Potassium persulfate (91.8 mg, 0.3 mmol, 4% parts) was added, and then in Polymerize at 70°C for 12 hours, and then dialyze with a dialysis bag with a molecular weight cut-off of 8,000 to 14,000 for 48 hours after the polymerization, and change the water 8-12 times during the period to obtain a two-dimensional copolymer. The H NMR spectrum of the two-dimensional copolymer is shown in Fig. 2 .

The transmission electron microscope (TEM) image of the obtained copolymer is shown in FIG. 3 . From the TEM image, it can be seen that the lamellar morphology of the two-dimensional copolymer prepared in this embodiment can reach a size of one to two microns. Disperse the copolymer in deionized water and observe it with an optical microscope (OM). From Figure 4, a large number of sheets can be found. Atomic force microscopy (AFM) shows that the thickness of the prepared two-dimensional copolymer sheet is about 1.497nm. It can be seen from Figure 5 that this value is about twice the thickness of 0.7nm of sodium p-styrene sulfonate simulated by Chem 3D , indicating the formation of bilayer two-dimensional copolymers.

The two-dimensional polymer copolymerized with DBA and sodium p-styrene sulfonate was made into a film by solution casting method, and then the mechanical properties were tested with an electronic universal tensile testing machine. The results are shown in Figure 6. The higher the copolymerization ratio, the better the tensile properties .

Comparative example 1

The specific implementation steps are as follows:

(1) First synthesize 3,5 diacryloyloxybenzoic acid (ABA): Weigh 3,5 dihydroxybenzoic acid (3.08g, 20mmol) into the reaction flask, then add 2.35g sodium hydroxide aqueous solution (100mL) ; After stirring at 5°C for 20min, slowly add acryloyl chloride (6.5mL, 80mmol) dropwise, after the dropwise addition, warm to room temperature for 6h. After the reaction, the reaction solution was acidified to produce a large amount of precipitate, which was washed with a large amount of deionized water. Finally, dry in a vacuum oven to obtain a white solid which is the target product ABA.

(2) Weigh ABA (200mg, 0.77mmol, ten parts) into 50mL deionized water and ultrasonically disperse for 20min, then add (88.7mg, 0.77mmol, ten parts) organic base 1,1,3,3 tetramethyl Guanidine, shake to make it clear, weigh sodium p-styrene sulfonate (317.5mg, 1.54mmol, twenty parts) and add it to 50mL deionized water, mix it with ABA solution after dissolving, and let stand at room temperature for 1-2 hours , to obtain a supramolecular solution.

(3) Use potassium persulfate as the initiator, freeze the supramolecular solution with liquid nitrogen to extract the air, then thaw and fill with nitrogen, repeat the operation three times, add potassium persulfate (33.3mg, 0.12mmol, 4% parts), and then Polymerize at 70°C for 12 hours. After the polymerization, dialyze with a dialysis bag with a molecular weight cut-off of 8000-14000 for 48 hours. During this period, change the water 8-12 times to finally obtain the copolymer dialysate.

Take a small amount of copolymer dialyzate and put it into a freeze dryer for 72 hours to freeze-dry to obtain a white copolymer solid. The copolymer solid was used for scanning electron microscopy (SEM) testing, and it was found that no flakes were formed (as shown in Figure 7). Through this comparative example, it can be shown that the lack of hydrogen bonding cannot induce the orientation assembly of ordinary amphiphilic monomers, and cannot form two-dimensional copolymers; it shows that the hydrogen bonding force is very important for inducing the orientation of ordinary amphiphilic monomers to form two-dimensional sheets .

Example 2

A method for preparing a two-dimensional copolymer using hydrogen bond-induced assembly, specifically comprising the following steps:

(1) Preparation of two-dimensional supramolecular solutions

Weigh DBA (200mg, 0.77mmol, ten parts) into 50mL deionized water and ultrasonically disperse for 20min to obtain a gray-purple suspension; then add (88.7mg, 0.77mmol, ten parts) organic base 1,1 to the suspension , 3,3 Tetramethylguanidine, the gray-purple suspension was immediately clear and transparent; Weighed 4-vinylbenzoic acid (1.141g, 7.7mmol, one hundred parts) and added it to 50mL deionized water, then added sodium hydroxide (308mg, 7.7mmol, one hundred parts) to make it dissolve, then add the 4-vinylbenzoic acid solution into the DBA solution and mix evenly, and let stand at room temperature for 2 hours to obtain a two-dimensional supramolecular solution.

(2) Preparation of two-dimensional copolymers

Using potassium persulfate as the initiator, the two-dimensional supramolecular solution was frozen with liquid nitrogen to extract the air, then thawed and filled with nitrogen, and the operation was repeated three times. Potassium persulfate (91.8 mg, 0.34 mmol, 4% parts) was added, and then in Polymerize at 70°C for 24 hours, and then dialyze with a dialysis bag with a molecular weight cut-off of 8,000 to 14,000 for 48 hours after the polymerization, and change the water 8-12 times during the period to obtain a two-dimensional copolymer. The H NMR spectrum of the two-dimensional copolymer is shown in Fig. 8 .

Gained two-dimensional copolymer is observed with optical microscope (OM) after being dispersed with deionized water, and the result is as shown in Figure 9. From the optical microscope figure, it can be seen that the lamellar morphology of the solid two-dimensional copolymer prepared in this embodiment, The size can reach tens of microns.

Example 3

(1) Preparation of two-dimensional supramolecular solutions

Weigh the monomer molecule DBA (200mg, 0.77mmol, ten parts) into 50mL deionized water and ultrasonically disperse for 20min to obtain a gray-purple suspension, then add (88.7mg, 0.77mmol, ten parts) organic base to the suspension 1,1,3,3 Tetramethylguanidine, the gray-purple suspension was immediately clear and transparent, weighed 4-vinylphenylboronic acid (1.139g, 7.7mmol, one hundred parts) and joined in 50mL water, then added sodium hydroxide ( 616mg, 15.4mmol, 200 parts), then mixed with DBA solution evenly, and allowed to stand at room temperature for 1.5h to obtain a two-dimensional supramolecular solution.

(2) Preparation of two-dimensional copolymers

Using potassium persulfate (91.8mg, 0.34mmol, 4%) as an initiator, the two-dimensional supramolecular solution was frozen with liquid nitrogen to extract the air, then thawed and filled with nitrogen, and the operation was repeated three times, and then polymerized at 70°C for 18h , After the polymerization is completed, use a dialysis bag with a molecular weight cut-off of 8000-14000 for 48 hours, and change the water 8-12 times during the period, and finally obtain a two-dimensional copolymer.

Example 4

(1) Preparation of two-dimensional supramolecular solutions

Weigh the monomer molecule DBA (200mg, 0.77mmol, ten parts) into 100mL deionized water and ultrasonically disperse for 20min to obtain a gray-purple suspension, then add (88.7mg, 0.77mmol, ten parts) organic base to the suspension 1,1,3,3-Tetramethylguanidine, the gray-purple suspension was immediately clear and transparent, weighed 4-vinylphenyl-N,N-dimethylamine (1.241g, 7.7mmol, one hundred parts) and added DBA Mix evenly in the solution, and let stand at room temperature for 2 hours to obtain a two-dimensional supramolecular solution.

(2) Preparation of two-dimensional copolymers

Using potassium persulfate (91.8mg, 0.34mmol, 4% parts) as an initiator, the supramolecular solution was frozen with liquid nitrogen to remove the air, then thawed and filled with nitrogen, and the operation was repeated three times, and then polymerized at 70°C for 12h. After the polymerization, use a dialysis bag with a molecular weight cut-off of 8000-14000 for 48 hours, and change the water 8-12 times during the period to obtain a two-dimensional copolymer.

In summary, the present invention makes use of the hydrogen bond force provided by the amide group in amphiphilic monomers containing hydrogen bond donor or acceptor structures, so that ordinary amphiphilic monomers that cannot form two-dimensional structures by themselves The two-dimensional supramolecules were formed by oriented assembly in solvent, followed by in situ free radical polymerization to successfully prepare bilayer two-dimensional covalent copolymers. This indicates that the orientation-induced force of hydrogen bonds plays an indispensable role in the packing of molecules into two-dimensional morphology.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for preparing a two-dimensional copolymer utilizing hydrogen bond-induced assembly, characterized in that, comprising the following steps: (1) Co-assembly of amphiphilic monomers containing hydrogen bond donor or acceptor structures with common amphiphilic monomers: add amphiphilic monomers containing hydrogen bond donor or acceptor structures to deionized water, and then add organic Alkali or inorganic base, shake to dissolve, then add ordinary amphiphilic monomers and mix evenly, let it stand for a period of time, and then form a two-dimensional supramolecular solution; (2) Polymerization reaction: a free radical initiator is added to the two-dimensional supramolecular solution, and after three rounds of deoxygenation and nitrogen gas operation, in-situ free radical polymerization is performed at a certain temperature to obtain a two-dimensional copolymer. 2. A method for preparing a two-dimensional copolymer utilizing hydrogen bond-induced assembly according to claim 1, wherein the amphiphilic monomer structure containing hydrogen bond donor or acceptor structure contains benzene ring and A monomer with two double bonds. 3. A method for preparing a two-dimensional copolymer utilizing hydrogen bond-induced assembly according to claim 1, wherein the general amphiphilic monomer structural formula is:

4 . A method for preparing a two-dimensional copolymer by hydrogen bond-induced assembly according to claim 1 , wherein the standing time is 1-2 h; the temperature is 60-80° C. 5. A method for preparing a two-dimensional copolymer using hydrogen bond-induced assembly according to claim 1, wherein said co-assembly comprises the following steps: weighing the amphiphilic structure containing hydrogen bond donor or acceptor structure Put 1-10 parts of monomer into the polymerization bottle, add 5-50 parts of solvent, and ultrasonically disperse; then add 1-10 parts of organic base or inorganic base into the polymerization bottle, shake well to get a transparent solution; then weigh the ordinary amphiphile Add 10-100 parts of the active monomer into 5-50 parts of solvent and shake to dissolve, mix the two parts of the solution evenly, and let stand at room temperature for 1-2 hours to obtain the co-assembled supramolecular solution. 6. A method for preparing a two-dimensional copolymer utilizing hydrogen bond-induced assembly according to claim 5, wherein the organic base is 1,1,3,3-tetramethylguanidine, triethylamine A kind of; The inorganic base is a kind of in sodium hydroxide, potassium hydroxide; The solvent is deionized water. 7. A method for preparing a two-dimensional copolymer utilizing hydrogen bond-induced assembly according to claim 1, wherein said in-situ radical polymerization comprises the following steps: freezing the two-dimensional supramolecular solution with liquid nitrogen Evacuate the air, then thaw and fill with nitrogen, repeat the operation three times; then weigh 2-4% of the initiators of the two monomers into the polymerization bottle, and polymerize for 12-24h in an environment of 60-80°C; then copolymerize The substance solution was poured into a dialysis bag and dialyzed with deionized water for 24-48 hours, during which the water was changed 8-12 times. 8. A method for preparing a two-dimensional copolymer by hydrogen bond-induced assembly according to claim 1 or 7, wherein the initiator is one of a water-soluble initiator or an oil-soluble initiator. 9. a kind of method utilizing hydrogen bond induction assembly to prepare two-dimensional copolymer according to claim 8, is characterized in that, described water-soluble initiator comprises a kind of wherein of potassium persulfate or ammonium persulfate; The soluble initiator includes one of azobisisobutyronitrile, azobisisoheptanonitrile and dibenzoyl peroxide. 10. The two-dimensional copolymer prepared by the method for preparing a two-dimensional copolymer by utilizing hydrogen bond-induced assembly according to any one of claims 1-9.

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