Antifouling wear-resistant acrylic plate and preparation method thereof

Abstract

The invention provides an antifouling wear-resistant acrylic plate and a preparation method thereof, and belongs to the technical field of acrylic plates. The preparation method comprises the following steps: preparing the modifier; modifying the carbon nano tube; preparing an antifouling additive; and preparing the antifouling wear-resistant acrylic plate. The preparation method comprises the following steps: respectively dissolving polysuccinimide and dopamine hydrochloride, mixing for reaction, adding 3-dimethylaminopropylamine for reaction, and finally adding 1, 3-propane sultone for reaction to obtain a modifier containing zwitter-ion groups, modifying acidified carbon nanotubes by using the modifier, and then adding the zwitter-ion groups into the modified carbon nanotubes to obtain the modified carbon nanotubes with the zwitter-ion groups. The wear resistance and the antifouling property of the prepared acrylic plate can be obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of acrylic plates, and particularly relates to an anti-fouling and wear-resistant acrylic plate and a preparation method thereof. Background Art

[0002] Acrylic plates (polymethyl methacrylate) are widely used in fields such as construction, advertising, and medical devices due to their excellent light transmittance, weather resistance, and easy processability. However, traditional acrylic plates face two major technical bottlenecks in practical applications: firstly, the surface hardness is low and the wear resistance is poor. After long-term use, scratches are easily generated due to friction or scratching, resulting in a decrease in light transmittance and loss of aesthetics; secondly, the surface energy is relatively high, and it is easy to adsorb pollutants such as oil stains and dust, resulting in high cleaning and maintenance costs and affecting the service life.

[0003] Currently, to improve the wear resistance of acrylic plates, it is mostly achieved by adding inorganic nano-fillers (such as carbon nanotubes, nano-silica), but the compatibility between inorganic nano-fillers and the polymethyl methacrylate matrix is poor, and it is easy to agglomerate, resulting in uneven mechanical properties; in addition, the anti-fouling modification of acrylic plates often relies on surface coating of hydrophobic / oil-repellent coatings to improve, but the binding force between the coating and the matrix is weak, and it is easy to peel off and fail after long-term friction.

[0004] Therefore, it is necessary to propose an anti-fouling and wear-resistant acrylic plate and a preparation method thereof to improve the service life of acrylic plates. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an anti-fouling and wear-resistant acrylic plate and a preparation method thereof.

[0006] A preparation method of an anti-fouling and wear-resistant acrylic plate includes the following steps: S1: Prepare a modifier Dissolve poly(succinimide) and dopamine hydrochloride respectively, then mix them for reaction, and then successively add 3-dimethylaminopropylamine and 1,3-propane sultone for reaction respectively to obtain a modifier; S2: Modify carbon nanotubes Dissolve the above-mentioned modifier in dimethyl sulfoxide, add acidified carbon nanotubes, stir and heat, and then add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide for reaction to obtain modified carbon nanotubes; S3: Prepare an anti-fouling additive Add perfluorodecyltriethoxysilane and tetraethyl orthosilicate to ethanol according to a volume ratio of 1:1:(20 - 30) mL, stir and mix well, and then add an acetic acid solution with a concentration of 1 mol / L, stir and react for 24 - 28 h to obtain an anti-fouling additive; S4: Prepare an anti-fouling and wear-resistant acrylic plate Add polymethyl methacrylate, the above-mentioned antifouling additive, the above-mentioned modified carbon nanotubes, and silane coupling agent KH-550 into a mixer for melt blending, then pour into a mold for molding. After cooling, demold to obtain an antifouling and wear-resistant acrylic sheet.

[0007] Further, S1 specifically includes the following steps: S1.1: Add poly(succinimide) into dimethyl sulfoxide according to a solid-liquid ratio of 1 g : (4 - 6) mL. After fully dissolving, obtain a poly(succinimide) solution. S1.2: Dissolve dopamine hydrochloride in dimethyl sulfoxide according to a solid-liquid ratio of 1 g : (6 - 10) mL, and add triethylamine. After fully dissolving, obtain a dopamine solution. S1.3: Add the above dopamine solution into the above poly(succinimide) solution, heat under reflux at 60 - 80 °C for 20 - 24 h to obtain solution A. S1.4: Add 3-dimethylaminopropylamine to the above solution A, keep the temperature and continue to react for 16 - 18 h to obtain solution B. S1.5: Add the above solution B into 1,3-propanesultone, continue to heat and react at 40 - 50 °C for 12 - 16 h, then precipitate with acetone, filter and dry to obtain a modifier.

[0008] Further, S2 specifically includes the following steps: S2.1: Add carbon nanotubes into a mixed acid solution according to a solid-liquid ratio of 1 g : (10 - 20) mL, heat under reflux at 70 - 80 °C for 6 - 8 h, then centrifuge, wash until neutral and dry to obtain acidified carbon nanotubes. S2.2: Dissolve the modifier prepared in step S1.5 in dimethyl sulfoxide according to a solid-liquid ratio of 1 g : (90 - 100) mL, then add the above acidified carbon nanotubes, heat and stir at 50 - 60 °C for 10 - 12 h, then add an equimolar amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide, continue to stir and react for 20 - 24 h. After cooling, centrifuge, wash and dry under vacuum to obtain modified carbon nanotubes.

[0009] Further, the solid-liquid ratio of dopamine hydrochloride to triethylamine is 1 g : (3 - 5) mL, and the molar ratio of dopamine hydrochloride to poly(succinimide) is 1 : (3.1 - 3.3).

[0010] Further, the molar ratio of 3-dimethylaminopropylamine to poly(succinimide) is (0.7 - 0.8) : 1, and the molar ratio of 1,3-propanesultone to poly(succinimide) is (1 - 1.2) : 1.

[0011] Further, the mixed acid solution is formed by mixing concentrated nitric acid and concentrated sulfuric acid at a volume ratio of 1:3, and the addition amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide is 40-50% of the mass of the acidified carbon nanotubes.

[0012] Further, the mass ratio of the modifier to the acidified carbon nanotubes is 1:(5-10).

[0013] Further, the volume ratio of acetic acid to perfluorodecyltriethoxysilane is 1:1.

[0014] Further, by mass, the raw material composition of the anti-fouling and wear-resistant acrylic sheet is: 65-75 parts of polymethyl methacrylate, 8-10 parts of anti-fouling additive, 3-5 parts of modified carbon nanotubes, and 1-2 parts of silane coupling agent KH-550.

[0015] Further, an anti-fouling and wear-resistant acrylic sheet is prepared by the preparation method of an anti-fouling and wear-resistant acrylic sheet described in any one of the above.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: 1. In the present invention, poly(succinimide) and dopamine hydrochloride are first dissolved respectively, and then mixed for reaction to form amide bonds and hydroxyl groups. Then 3-dimethylaminopropylamine is added for reaction to generate tertiary amine groups and hydroxyl groups. Finally, 1,3-propane sultone is added for reaction to form sulfonic acid groups, obtaining a modifier containing zwitterionic groups. After modifying the acidified carbon nanotubes with this modifier, the modified carbon nanotubes can be uniformly dispersed in the polymethyl methacrylate matrix through π-π stacking and covalent bonds to form a three-dimensional network structure, significantly improving the wear resistance of the prepared acrylic sheet. Moreover, the positive and negative charge groups of the modifier adsorb water molecules through electrostatic balance to form a dense hydration layer, repelling pollutants such as proteins and dust, thereby effectively improving the anti-fouling performance of the acrylic sheet.

[0017] 2. In the present invention, perfluorodecyltriethoxysilane and tetraethyl orthosilicate are added to ethanol, and then an acetic acid solution is added for reaction, so that perfluorodecyltriethoxysilane hydrolyzes to generate silanol under acidic conditions and then condenses with tetraethyl orthosilicate to form a silica skeleton, introducing perfluoroalkyl chains into the silica network to form a core-shell structured anti-fouling additive. After adding it to polymethyl methacrylate to make an acrylic sheet, the perfluoroalkyl chains can reduce stain adhesion through the low surface energy effect. In addition, the perfluoroalkyl chains and the zwitterions of the modifier can jointly construct an ultra-low surface energy surface, thus achieving the effect of synergistically improving the anti-fouling performance of the acrylic sheet. Description of the Drawings

[0018] The accompanying drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present disclosure and, together with the specification, are further used to explain the principles of the present disclosure and enable those skilled in the relevant art to implement and use the present disclosure.

[0019] Figure 1 It is a flowchart of the preparation method of the anti-fouling and wear-resistant acrylic board adopted in the embodiment of the present invention. Detailed implementation manners

[0020] The following describes in detail an anti-fouling and wear-resistant acrylic board and a preparation method thereof provided by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0021] Embodiment 1 A preparation method of an anti-fouling and wear-resistant acrylic board, as Figure 1 shown, includes the following steps: S1: Prepare a modifier S1.1: Add poly(succinimide) to dimethyl sulfoxide according to a solid-liquid ratio of 1 g: 4 mL. After fully dissolving, a poly(succinimide) solution is obtained; S1.2: Dissolve dopamine hydrochloride in dimethyl sulfoxide according to a solid-liquid ratio of 1 g: 6 mL, and add triethylamine. After fully dissolving, a dopamine solution is obtained, wherein the solid-liquid ratio of dopamine hydrochloride to triethylamine is 1 g: 3 mL; S1.3: Add the above dopamine solution to the above poly(succinimide) solution, and heat and reflux at 60 °C for 20 h to obtain solution A, wherein the molar ratio of dopamine hydrochloride to poly(succinimide) is 1: 3.1; S1.4: Add 3-dimethylaminopropylamine to the above solution A, keep the temperature and continue to react for 16 h to obtain solution B, wherein the molar ratio of 3-dimethylaminopropylamine to poly(succinimide) is 0.7: 1; S1.5: Add the above solution B to 1,3-propanesultone, continue to heat and react at 40 °C for 12 h, then precipitate with acetone, filter and dry to obtain a modifier, wherein the molar ratio of 1,3-propanesultone to poly(succinimide) is 1: 1; S2: Modify carbon nanotubes S2.1: Add carbon nanotubes to a mixed acid solution formed by mixing concentrated nitric acid and concentrated sulfuric acid according to a volume ratio of 1: 3 according to a solid-liquid ratio of 1 g: 10 mL, heat and reflux at 70 °C for 6 h, then centrifuge, wash until neutral and dry to obtain acidified carbon nanotubes; S2.2: Dissolve the modifier prepared in step S1.5 in dimethyl sulfoxide according to a solid-liquid ratio of 1 g: 90 mL, then add the above-mentioned acidified carbon nanotubes, heat and stir at 50 °C for 10 h, then add an equimolar amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide, continue to stir and react for 20 h. After cooling, centrifuge, wash and dry in vacuum to obtain modified carbon nanotubes, wherein the mass ratio of the modifier to the acidified carbon nanotubes is 1:5, and the addition amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide is 40% of the mass of the acidified carbon nanotubes; S3: Prepare an anti-fouling additive Add perfluorodecyltriethoxysilane and tetraethyl orthosilicate to ethanol according to a volume ratio of 1:1:20 mL, stir and mix well, then add an acetic acid solution with a concentration of 1 mol / L, stir and react for 24 h to obtain an anti-fouling additive, wherein the volume ratio of acetic acid to perfluorodecyltriethoxysilane is 1:1; S4: Prepare an anti-fouling and wear-resistant acrylic sheet Add 65 parts by mass of polymethyl methacrylate, 8 parts by mass of the above anti-fouling additive, 3 parts by mass of the above modified carbon nanotubes and 1 part by mass of silane coupling agent KH-550 to a mixer, carry out melt blending, then pour into a mold for molding. After cooling, demold to obtain an anti-fouling and wear-resistant acrylic sheet.

[0022] Example 2 A preparation method of an anti-fouling and wear-resistant acrylic sheet, as Figure 1 shown, includes the following steps: S1: Prepare a modifier S1.1: Add poly(succinimide) to dimethyl sulfoxide according to a solid-liquid ratio of 1 g: 5 mL, and after complete dissolution, obtain a poly(succinimide) solution; S1.2: Dissolve dopamine hydrochloride in dimethyl sulfoxide according to a solid-liquid ratio of 1 g: 8 mL, and add triethylamine. After complete dissolution, obtain a dopamine solution, wherein the solid-liquid ratio of dopamine hydrochloride to triethylamine is 1 g: 4 mL; S1.3: Add the above dopamine solution to the above poly(succinimide) solution, heat and reflux at 70 °C for 22 h to obtain solution A, wherein the molar ratio of dopamine hydrochloride to poly(succinimide) is 1:3.2; S1.4: Add 3-dimethylaminopropylamine to the above solution A, keep warm and continue to react for 17 h to obtain solution B, wherein the molar ratio of 3-dimethylaminopropylamine to poly(succinimide) is 0.75:1; S1.5: Add the above solution B into 1,3 - propane sultone, continue heating and reacting at 45 °C for 14 h, then precipitate with acetone, filter and dry to obtain a modifier, where the molar ratio of 1,3 - propane sultone to polysuccinimide is 1.1:1; S2: Modified carbon nanotubes S2.1: Add carbon nanotubes into a mixed acid solution composed of concentrated nitric acid and concentrated sulfuric acid in a volume ratio of 1:3 according to a solid - liquid ratio of 1 g:15 mL, heat under reflux at 75 °C for 7 h, then centrifuge, wash until neutral and dry to obtain acidified carbon nanotubes; S2.2: Dissolve the modifier prepared in step S1.5 in dimethyl sulfoxide according to a solid - liquid ratio of 1 g:95 mL, then add the above acidified carbon nanotubes, heat and stir at 55 °C for 11 h, then add an equimolar amount of 1 - ethyl - 3 - (3 - dimethylaminopropyl) carbodiimide and N - hydroxysuccinimide, continue stirring and reacting for 22 h, after cooling, centrifuge, wash and vacuum dry to obtain modified carbon nanotubes, where the mass ratio of the modifier to the acidified carbon nanotubes is 1:7.5, and the addition amount of 1 - ethyl - 3 - (3 - dimethylaminopropyl) carbodiimide is 45% of the mass of the acidified carbon nanotubes; S3: Preparation of antifouling additive Add perfluorodecyltriethoxysilane and tetraethyl orthosilicate into ethanol according to a volume ratio of 1:1:25 mL, stir and mix well, then add an acetic acid solution with a concentration of 1 mol / L, stir and react for 26 h to obtain an antifouling additive, where the volume ratio of acetic acid to perfluorodecyltriethoxysilane is 1:1; S4: Preparation of antifouling and wear - resistant acrylic sheet Add 70 parts by mass of polymethyl methacrylate, 9 parts by mass of the above - mentioned antifouling additive, 4 parts by mass of the above - mentioned modified carbon nanotubes and 1.5 parts by mass of silane coupling agent KH - 550 into a mixer, carry out melt blending, then pour into a mold for molding, after cooling, demold to obtain an antifouling and wear - resistant acrylic sheet.

[0023] Example 3 A preparation method of an antifouling and wear - resistant acrylic sheet, as Figure 1 shown, includes the following steps: S1: Preparation of modifier S1.1: Add polysuccinimide into dimethyl sulfoxide according to a solid - liquid ratio of 1 g:6 mL, after fully dissolving, obtain a polysuccinimide solution; S1.2: Dissolve dopamine hydrochloride in dimethyl sulfoxide according to a solid - liquid ratio of 1 g:10 mL, and add triethylamine, after fully dissolving, obtain a dopamine solution, where the solid - liquid ratio of dopamine hydrochloride to triethylamine is 1 g:5 mL; S1.3: Add the above dopamine solution to the above poly(succinimide) solution, heat under reflux at 80 °C for 24 h to obtain solution A, where the molar ratio of dopamine hydrochloride to poly(succinimide) is 1:3.3; S1.4: Add 3-dimethylaminopropylamine to the above solution A, keep the temperature and continue the reaction for 18 h to obtain solution B, where the molar ratio of 3-dimethylaminopropylamine to poly(succinimide) is 0.8:1; S1.5: Add the above solution B to 1,3-propanesultone, continue to heat and react at 50 °C for 16 h, then precipitate with acetone, filter and dry to obtain the modifier, where the molar ratio of 1,3-propanesultone to poly(succinimide) is 1.2:1; S2: Modify carbon nanotubes S2.1: Add carbon nanotubes to the mixed acid solution composed of concentrated nitric acid and concentrated sulfuric acid in a volume ratio of 1:3 at a solid-liquid ratio of 1 g:20 mL, heat under reflux at 80 °C for 8 h, then centrifuge, wash until neutral and dry to obtain acidified carbon nanotubes; S2.2: Dissolve the modifier prepared in step S1.5 in dimethyl sulfoxide at a solid-liquid ratio of 1 g:100 mL, then add the above acidified carbon nanotubes, heat and stir at 60 °C for 12 h, then add an equimolar amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide, continue to stir and react for 24 h, after cooling, centrifuge, wash and vacuum dry to obtain modified carbon nanotubes, where the mass ratio of the modifier to the acidified carbon nanotubes is 1:10, and the addition amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide is 50% of the mass of the acidified carbon nanotubes; S3: Prepare anti-fouling additive Add perfluorodecyltriethoxysilane and tetraethyl orthosilicate to ethanol in a volume ratio of 1:1:30 mL, stir and mix well, then add acetic acid solution with a concentration of 1 mol / L, stir and react for 28 h to obtain the anti-fouling additive, where the volume ratio of acetic acid to perfluorodecyltriethoxysilane is 1:1; S4: Prepare anti-fouling and wear-resistant acrylic sheet Add 75 parts by mass of polymethyl methacrylate, 10 parts by mass of the above anti-fouling additive, 5 parts by mass of the above modified carbon nanotubes and 2 parts by mass of silane coupling agent KH-550 to a mixer, carry out melt blending, then pour into a mold for molding, after cooling, demold to obtain the anti-fouling and wear-resistant acrylic sheet.

[0024] Comparative Example 1 The difference between this Comparative Example 1 and Example 1 is that the modified carbon nanotubes in step S4 are replaced with an equal amount of acidified carbon nanotubes.

[0025] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the anti-fouling additive in Step S4 is removed.

[0026] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the modified carbon nanotubes in Step S4 are replaced with an equal amount of anti-fouling additive.

[0027] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that the anti-fouling additive in Step S4 is replaced with an equal amount of modified carbon nanotubes.

[0028] Test Example Test 1: The Barcol hardness of the acrylic plates prepared in Examples 1 - 3 and Comparative Example 1 was tested, and the results are shown in Table 1.

[0029] Table 1: Test Results of Barcol Hardness of Acrylic Plates

[0030] As shown in Table 1 above, after the carbon nanotubes were not modified in Comparative Example 1, the Barcol hardness of the prepared acrylic plate was significantly lower than that of Example 1. Thus, it can be seen that by first dissolving poly(succinimide) and dopamine hydrochloride separately and then mixing them for reaction to form amide bonds and hydroxyl groups, then adding 3-dimethylaminopropylamine for reaction to generate tertiary amine groups and hydroxyl groups, and finally adding 1,3-propane sultone for reaction to form sulfonic acid groups, a modifier containing zwitterionic groups was obtained. After modifying the acidified carbon nanotubes with this modifier, the wear resistance of the prepared acrylic plate can be significantly improved.

[0031] Test 2: According to JC / T 908 - 2013, the stain resistance of the acrylic plates prepared in Examples 1 - 3 and Comparative Examples 1 - 4 was tested, and the results are shown in Table 2.

[0032] Table 2: Test Results of Stain Resistance of Acrylic Plates

[0033] As shown in Table 2 above, after the carbon nanotubes were not modified in Comparative Example 1, the total pollution value of the prepared acrylic plate was significantly higher than that of Example 1. Thus, it can be seen that after modifying the carbon nanotubes with the modifier, the anti-fouling performance of the acrylic plate can be effectively improved; After the anti-fouling additive was not added in Comparative Example 2, the total pollution value of the prepared acrylic sheet was much higher than that of Example 1. It can be seen that by adding perfluorodecyltriethoxysilane and tetraethyl orthosilicate into ethanol and then adding acetic acid solution for reaction, perfluorodecyltriethoxysilane was hydrolyzed in an acidic condition to generate silanol, which was then condensed with tetraethyl orthosilicate to form a silicon dioxide skeleton, so that the perfluoroalkyl chain was introduced into the silicon dioxide network to form a core-shell structured anti-fouling additive. After adding it into polymethyl methacrylate to make an acrylic sheet, the attachment of stains can be reduced; When only a single anti-fouling additive or a single modified carbon nanotube was added in Comparative Example 3 and Comparative Example 4, the total pollution value of the prepared acrylic sheet was higher than that of Example 1, indicating that the anti-fouling additive and the modified carbon nanotube can synergistically improve the anti-fouling performance of the acrylic sheet.

[0034] The above embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A preparation method of an anti-fouling and wear-resistant acrylic plate, characterized in that, It includes the following steps: S1: Prepare a modifier, Dissolve poly(succinimide) and dopamine hydrochloride separately, then mix them for reaction, and then successively add 3-dimethylaminopropylamine and 1,3-propane sultone and react them separately to obtain a modifier; S2: Modify carbon nanotubes, Dissolve the above-mentioned modifier in dimethyl sulfoxide, add acidified carbon nanotubes, heat and stir, and then add 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide for reaction to obtain modified carbon nanotubes; S3: Prepare an anti-fouling additive, Add perfluorodecyltriethoxysilane and tetraethyl orthosilicate to ethanol according to a volume ratio of 1:1:(20 - 30) mL, stir and mix well, and then add an acetic acid solution with a concentration of 1 mol / L, stir and react for 24 - 28 h to obtain an anti-fouling additive; S4: Prepare an anti-fouling and wear-resistant acrylic plate, Add polymethyl methacrylate, the above-mentioned anti-fouling additive, the above-mentioned modified carbon nanotubes and silane coupling agent KH-550 into a mixer, carry out melt blending, then pour it into a mold for molding, and after cooling, demold to obtain an anti-fouling and wear-resistant acrylic plate.

2. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 1, characterized in that, S1 specifically includes the following steps: S1.1: Add poly(succinimide) to dimethyl sulfoxide according to a solid-liquid ratio of 1 g:(4 - 6) mL, and after fully dissolving, obtain a poly(succinimide) solution; S1.2: Dissolve dopamine hydrochloride in dimethyl sulfoxide according to a solid-liquid ratio of 1 g:(6 - 10) mL, and add triethylamine, and after fully dissolving, obtain a dopamine solution; S1.3: Add the above-mentioned dopamine solution to the above-mentioned poly(succinimide) solution, heat and reflux at 60 - 80 °C for 20 - 24 h to obtain solution A; S1.4: Add 3-dimethylaminopropylamine to the above-mentioned solution A, keep the temperature and continue to react for 16 - 18 h to obtain solution B; S1.5: Add the above-mentioned solution B to 1,3-propane sultone, continue to heat and react at 40 - 50 °C for 12 - 16 h, and then precipitate with acetone, filter and dry to obtain a modifier.

3. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 2, characterized in that, S2 specifically includes the following steps: S2.1: Add carbon nanotubes to a mixed acid solution according to a solid-liquid ratio of 1 g:(10 - 20) mL, heat and reflux at 70 - 80 °C for 6 - 8 h, and then centrifuge, wash to neutral and dry to obtain acidified carbon nanotubes; S2.2: Dissolve the modifier prepared in step S1.5 in dimethyl sulfoxide according to a solid-liquid ratio of 1 g:(90 - 100) mL, then add the above-mentioned acidified carbon nanotubes, heat and stir at 50 - 60 °C for 10 - 12 h, then add equimolar amounts of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide, continue to stir and react for 20 - 24 h, and after cooling, centrifuge, wash and vacuum dry to obtain modified carbon nanotubes.

4. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 2, characterized in that, The solid-liquid ratio of dopamine hydrochloride to triethylamine is 1 g:(3 - 5) mL, and the molar ratio of dopamine hydrochloride to poly(succinimide) is 1:(3.1 - 3.3).

5. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 2, characterized in that, The molar ratio of 3-dimethylaminopropylamine to polysuccinimide is (0.7 - 0.8):1, and the molar ratio of 1,3-propane sultone to polysuccinimide is (1 - 1.2):

1.

6. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 3, characterized in that, The mixed acid solution is formed by mixing concentrated nitric acid and concentrated sulfuric acid at a volume ratio of 1:3, and the addition amount of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide is 40 - 50% of the mass of acidified carbon nanotubes.

7. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 3, characterized in that, The mass ratio of the modifier to the acidified carbon nanotubes is 1:(5 - 10).

8. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 1, characterized in that, The volume ratio of acetic acid to perfluorodecyltriethoxysilane is 1:

1.

9. The preparation method of an anti-fouling and wear-resistant acrylic plate according to claim 1, characterized in that, By mass, the raw material composition of the anti-fouling and wear-resistant acrylic board is: 65 - 75 parts of polymethyl methacrylate, 8 - 10 parts of anti-fouling additive, 3 - 5 parts of modified carbon nanotubes, and 1 - 2 parts of silane coupling agent KH-550.

10. An anti-fouling and wear-resistant acrylic plate, characterized in that, It is prepared by the preparation method of an anti-fouling and wear-resistant acrylic board according to any one of claims 1 - 9.

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