A kind of non-deformation corrosion-resistant sandpaper and preparation method thereof

Abstract

The present invention discloses a non-deformable and corrosion-resistant sandpaper and a preparation method thereof, and relates to the field of abrasive sandpaper. The present invention comprises the following steps: coating latex paper with a base resin adhesive, planting sand on the surface of the base resin adhesive, and then covering the base resin adhesive with an outer layer of resin adhesive to produce a non-deformable and corrosion-resistant sandpaper; wherein furfuryl alcohol is used as a core material, and microcapsules are prepared using modified nano-aluminum trioxide hybridized phenolic resin and urea-formaldehyde resin as double-layer wall materials, and the outer layer of resin adhesive is prepared with epoxy resin to achieve long-term corrosion resistance of the sandpaper; a nano-silicon-titanium mixture is prepared by using n-propyl titanate, tetramethyl orthosilicate, and KH-570 silane coupling agent, and after being coated with large-diameter carbon nanotubes, an acrylic emulsion and propionic acid-modified epoxy resin are grafted to produce a base resin adhesive to increase toughness and strength, thereby achieving a non-deformable function.

Description

Technical Field

[0001] The invention relates to the technical field of abrasive paper, in particular to non-deformable and corrosion-resistant sandpaper and a preparation method thereof. Background Art

[0002] Sandpaper is a type of paper with abrasive particles attached to it. It is used to smooth surfaces, remove surface deposits (such as old paint), and sometimes increase friction. Sandpaper is graded according to its roughness to suit different applications. Currently, sandpaper is subject to significant damage when polishing workpieces with acidic or alkaline liquids attached to their surfaces, resulting in a generally short service life for the sandpaper itself. Existing sandpaper is also prone to deformation during use, which can lead to poor adhesion to the workpiece surface and affect its polishing performance. To address these issues, we have developed a non-deforming and corrosion-resistant sandpaper. Summary of the Invention

[0003] The purpose of the present invention is to provide a non-deformable and corrosion-resistant sandpaper and a preparation method thereof, so as to solve the problems existing in the prior art.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a non-deformable and corrosion-resistant sandpaper and a preparation method thereof, wherein the non-deformable and corrosion-resistant sandpaper is made by coating latex paper with a base resin glue, planting sand on the surface of the base resin glue, and then covering it with an outer layer of resin glue.

[0005] Furthermore, the outer layer resin glue is made of a double-layer resin capsule and epoxy resin; the double-layer resin capsule is made of furfuryl alcohol as the core material, nano-aluminum oxide hybridized phenolic resin as the wall material, and grafted with urea-formaldehyde resin.

[0006] Furthermore, the bottom resin adhesive is prepared from a nano-silicon-titanium mixture made of n-propyl titanate, tetramethyl orthosilicate, and KH-570, which is coated with large-diameter carbon nanotubes and then grafted with acrylic emulsion and propionic acid-modified epoxy resin.

[0007] Furthermore, the acrylic emulsion is prepared from methacrylic acid, acrylic acid, styrene, methyl methacrylate, and N-hydroxymethyl acrylamide.

[0008] Furthermore, a method for preparing non-deformable and corrosion-resistant sandpaper comprises the following preparation steps:

[0009] (1) Aluminum trioxide is modified with silane to obtain nano-aluminum trioxide, which is catalyzed by mixing phenol and formaldehyde to obtain a prepolymer, nano-aluminum trioxide and petroleum ether are added and mixed to obtain solution A, furfuryl alcohol, hexamethylenetetramine, and sodium lauryl sulfate are dissolved in deionized water to obtain solution B; solution A and solution B are mixed to obtain an emulsion, which is then polymerized by nitrogen to obtain microcapsules, and a deionized water solution of urea-formaldehyde resin is added, and hot-melt E-44 epoxy resin is added to obtain an outer layer resin glue;

[0010] (2) mixing n-propyl titanate, tetramethyl orthosilicate and KH-570 silane coupling agent to obtain a silicon-titanium mixture, adding large-diameter carbon nanotubes, polyvinyl pyrrolidone and deionized water, mixing uniformly to obtain a slurry, spray drying to obtain a composite material, adding ammonium persulfate deionized water solution and acrylic emulsion to obtain an acrylic polymer solution;

[0011] (3) Propionic acid and E-44 epoxy resin are mixed, nitrogen is introduced, tetrabutylammonium bromide is added at elevated temperature, and when the acid value drops to a level that meets the requirements, the mixture is cooled, and ethylene glycol butyl ether solution is added to dissolve the mixture to obtain epoxy ester resin. The acrylic polymer solution is added dropwise to the epoxy ester resin for graft copolymerization, and the mixture is heated to react to obtain a base resin adhesive;

[0012] (4) Apply a bottom layer of resin glue on one side of the latex paper, plant sand on the surface of the bottom layer of resin glue, dry and solidify it, apply an outer layer of resin glue, dry and solidify it, and obtain sandpaper that is not easy to deform and corrosion-resistant.

[0013] Furthermore, the specific preparation steps of the outer layer resin glue in step (1) are as follows: dissolving aluminum oxide in an ethanol deionized water solution with a mass ratio of 8 to 10 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:4 to 1:6, ultrasonically dispersing at 40 to 50W for 10 to 20 minutes, adding KH-570 with a mass of 0.08 to 0.12 times that of aluminum oxide, reacting at 60 to 70°C for 22 to 24 hours, filtering, and washing with ethanol for 2 to 3 hours. 3 times, dried at 70-80°C for 2-3 hours, ground through a 100-140 mesh sieve to obtain nano-aluminum trioxide; phenol, formaldehyde, and hydrochloric acid with a mass fraction of 36%-38% are mixed in a mass ratio of 1:0.15:0.08-1:0.19:0.1, reacted at 60-90°C for 4-6 hours to obtain a prepolymer, 0.1-0.14 times the mass of the prepolymer of nano-aluminum trioxide and 2-4 times the mass of the prepolymer of petroleum ether are added to obtain solution A; furfuryl alcohol, hexadecene, 1,2-dimethyl-1,2-dihydro- ... Methylenetetramine, sodium lauryl sulfate and deionized water were mixed in a mass ratio of 1:0.3:0.08:5 to 1:0.34:0.12:7 to prepare solution B; solution A and solution B were mixed in a mass ratio of 1:0.8 to 1:1, stirred at 500 to 800 rpm for 10 to 20 minutes to obtain an emulsion, ultrasonicated at 40 to 50 W for 0.5 to 1 hour, reacted under nitrogen protection for 2 to 3 hours, filtered, washed with deionized water 2 to 3 times to obtain microcapsules, and added microcapsules. A urea-formaldehyde resin deionized water solution with a mass of 1.8 to 2.2 times the mass of the capsule, wherein the mass ratio of urea-formaldehyde resin to deionized water is 1:1 to 1:2, is stirred at 500 to 800 rpm for 0.5 h, and dehydrated at 100 to 110° C. for 2 to 3 h. Then, E-44 epoxy resin with a mass of 5 to 10 times the mass of the microcapsules and a temperature of 110 to 130° C. is added, and the mixture is stirred at 110 to 130° C. and 400-600 rpm for 0.5 to 1 h to prepare an outer layer resin glue.

[0014] Furthermore, the specific preparation steps of the acrylic polymer solution in step (2) are as follows: adding n-propyl titanate, tetramethyl orthosilicate and KH-570 silane coupling agent in a mass ratio of 1:3:0.4 to 1:4:0.6, mixing to obtain a mixture, adding 4 to 6 times the mass of the mixture in an ethanol deionized water solution, the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:4 to 1:6, stirring at 500 to 800 rpm for 10 to 20 minutes, adding glacial acetic acid solution until the solution pH is 5, the mass ratio of glacial acetic acid to deionized water in the glacial acetic acid solution is 1:8 to 1:12, stirring at 500 to 700 rpm for 2 to 3 hours at 45°C to 55°C, filtering, and drying at 70 to 80°C for 2 to 3 hours to obtain a silicon-titanium mixture, and adding large-diameter carbon nanotubes and silicon-titanium mixed substances in a mass ratio of 0.15 to 0.19 times the mass of the silicon-titanium mixture. The method comprises the following steps: adding 0.004 to 0.006 times the mass of polyvinyl pyrrolidone and 100 to 120 times the mass of the silicon-titanium mixture to each other, ultrasonically stirring at 400 to 600 rpm and 40 to 50 W for 0.5 to 1 hour to obtain a slurry, spray drying to obtain a composite material, adding a deionized ammonium persulfate solution 4 to 6 times the mass of the composite material, wherein the mass ratio of ammonium persulfate to deionized water in the deionized ammonium persulfate solution is 1:8 to 1:12, adding an acrylic acid emulsion 4 to 6 times the mass of the composite material, placing the mixture in a water bath at 80 to 90° C., and stirring at 400 to 600 rpm for 2 to 3 hours to obtain an acrylic acid polymer solution; and the spray drying parameters are as follows: inlet and outlet temperatures are 170 to 190° C. and 90 to 110° C., respectively, a peristaltic pump feed rate is 8 to 12 mL / min, a fan frequency is 35 to 45 Hz, and a needle setting is 7 to 9.

[0015] Furthermore, the acrylic emulsion is prepared by mixing acrylic acid, methacrylic acid, styrene, methyl methacrylate, N-hydroxymethyl acrylamide, and OP emulsifier in a mass ratio of 1:2.2:1.0:1.3:0.8:0.6 to 1:2.6:1.4:1.5:1.2:0.8, and stirring at 400-600 rpm for 0.5-1 hour to prepare the acrylic emulsion.

[0016] Furthermore, the specific preparation steps of the bottom resin glue in step (3) are as follows: add propionic acid and E-44 epoxy resin in a mass ratio of 1:12 to 1:16, stir at 400 to 600 rpm under nitrogen protection, heat to 140 to 160°C at 1 to 3°C / min, let it stand until the epoxy resin melts, add tetrabutylammonium bromide with a mass of 0.1 to 0.3 times that of propionic acid, heat to 190 to 210°C at 1 to 3°C / min, and keep warm to react until the acid value drops to 3 mg When the mass of KOH / g is 200-300 KOH / g, the mixture is cooled to 50-70°C, and a butyl glycol ether solution with a mass of 1.4-1.6 times that of propionic acid is added, and the mass ratio of butyl glycol ether to propylene glycol methyl ether in the butyl glycol ether solution is 1:1-1:1.2 to obtain an epoxy ester resin. At 90-110°C, the acrylic polymer solution is added dropwise at a rate of 8-10 mL / min to the epoxy ester resin with a mass of 4-6 times that of the acrylic polymer solution, and the temperature is raised to 90-110°C. The mixture is reacted for 4-6 hours to obtain a base resin adhesive.

[0017] Furthermore, the specific preparation steps of the non-deformable and corrosion-resistant sandpaper in step (4) are as follows: a base layer of resin glue is coated on one side of the latex paper, the thickness of the base layer of resin glue is 0.8 to 1.2 mm, sand is planted on the surface of the base layer of resin glue, and then the resin glue is dried and cured at 50 to 70°C for 0.5 to 1 hour, and an outer layer of resin glue is coated, the thickness of the outer layer of resin glue is 0.8 to 1.2 mm, and the resin glue is dried and cured at 50 to 70°C for 0.5 to 1 hour.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] The sandpaper is made of latex paper coated with a base resin glue, sand planted on the surface of the base resin glue, and then covered with an outer layer of resin glue. The outer layer of resin glue is made of double-layer resin capsules and epoxy resin to achieve long-term corrosion resistance of the sandpaper; the base resin glue is made of titanate propyl ester, tetramethyl orthosilicate, acrylic emulsion, and propionic acid-modified epoxy resin to increase toughness and strength and achieve the function of not being easy to deform.

[0020] First, microcapsules are prepared with furfuryl alcohol as the core material and nano-aluminum oxide hybridized phenolic resin as the wall material. Urea-formaldehyde resin is added, and the hydroxyl groups of the phenolic resin and the amino groups of the urea-formaldehyde resin can undergo a dehydration condensation reaction to generate amide groups to obtain double-layer resin capsules. When encountering a corrosive medium, the urea-formaldehyde resin first decomposes into a gel to isolate the corrosive medium from penetrating into the sandpaper. After the outer capsule layer is polished and broken multiple times, the heat generated by the polishing prompts the aluminum oxide in the inner capsule layer to absorb acid and alkali to generate aluminum chloride or sodium aluminate, thereby increasing the corrosion resistance of the sandpaper. After the inner capsule layer is further broken, the furfuryl alcohol self-polymerizes to form a new resin layer, which effectively isolates the corrosive medium and achieves a long-term corrosion resistance of the sandpaper. It can also re-reinforce the bonding between the abrasive and the underlying resin glue to achieve better wear resistance. Epoxy resin is added to prepare an outer layer of resin glue, and the epoxy group of the epoxy resin reacts with the urea group of the urea-formaldehyde resin to form a cured product, thereby increasing the thermal curing strength of the outer layer of resin glue, covering and protecting the abrasive material, and increasing wear resistance.

[0021] Secondly, a silicon-titanium mixture is prepared using n-propyl titanate, tetramethyl orthosilicate, and KH-570 silane coupling agent, and the silicon-titanium mixture is hydrolyzed to obtain silicon-oxygen-titanium particles in the shape of a three-dimensional spherical skeleton. Spray drying is then used to wrap the surface of the nano-titanium-oxygen-silicon particle mixture with large-diameter carbon nanotubes. The large-diameter carbon nanotubes serve as a conductive skeleton to improve the conductivity of the underlying resin glue, accelerate the accumulation rate of charges in the underlying resin glue, increase the electrostatic force of the underlying resin glue per unit time, and enhance the electrostatic sand-planting effect. Acrylic acid molecular chains are then in-situ grafted with the three-dimensional spherical skeleton structure as the center, and extend outward with the skeleton, wrapping around the large-diameter carbon nanotubes and cross-linking each other to form a An acrylic polymer with a hyperbranched structure and elastic acrylic polymer increase the toughness of the underlying resin glue and reduce the generation of cracks. At the same time, large-diameter carbon nanotubes increase the strength of the underlying resin glue, and then react with propionic acid and epoxy resin. The acrylic polymer with a stable three-dimensional spherical skeleton is wrapped with a hyperbranched structure to graft epoxy resin to form the underlying resin glue. In the highly cross-linked three-dimensional network structure formed during the thermal curing process of the underlying resin, the long carbon chains, benzene, lipid groups and other groups in the hyperbranched structure increase the sliding between molecular chains, reduce the internal stress of the resin, improve the problems of brittleness and low ductility of the resin after curing, increase toughness, and achieve the function of not being easy to deform. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the various indicators of the non-deformable and corrosion-resistant sandpaper prepared in the following examples and the preparation method thereof.

[0024] Wear resistance: The cutting force of the embodiment and the comparative example of the same size was tested according to GB / T16458;

[0025] Deformability: The folding resistance of the embodiment and the comparative example of the same size was tested according to GB / T457;

[0026] Corrosion resistance: Cut the samples of the embodiment and comparative example into 20 cm*20 cm areas, place them in a hydrochloric acid solution with a pH of 3.5 and a sodium hydroxide solution with a pH of 9.5, respectively, and soak them at room temperature for 72 h. Calculate the corrosion rate; corrosion rate = (area before corrosion - area after corrosion) / area before corrosion × %.

[0027] Example 1

[0028] (1) Aluminum oxide was dissolved in an ethanol deionized water solution with a mass ratio of 8 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution was 1:4, and ultrasonic dispersion was performed at 40W for 10 minutes. KH-570 with a mass ratio of 0.08 times that of aluminum oxide was added, and the mixture was reacted at 60°C for 22 hours. The mixture was filtered and washed twice with ethanol, dried at 70°C for 2 hours, and ground through a 100-mesh sieve to obtain nano-aluminum oxide. Phenol, formaldehyde, and hydrochloric acid with a mass fraction of 36% were mixed in a mass ratio of 1:0.15:0.08, and reacted at 60°C for 4 hours to obtain a prepolymer. Nano-aluminum oxide with a mass ratio of 0.1 times that of the prepolymer and petroleum ether with a mass ratio of 2 times that of the prepolymer were added to obtain solution A. Furfuryl alcohol, hexamethylenetetramine, and dodecaned were added. Sodium alkyl sulfate and deionized water were mixed in a mass ratio of 1:0.3:0.08:5 to prepare solution B; solution A and solution B were mixed in a mass ratio of 1:0.8, stirred at 500 rpm for 10 min to obtain an emulsion, subjected to 40W ultrasonic treatment for 0.5 h, reacted under nitrogen protection for 2 h, filtered, and washed twice with deionized water to obtain microcapsules, and a urea-formaldehyde resin deionized water solution with a mass ratio of urea-formaldehyde resin to deionized water of 1:1 was added, stirred at 500 rpm for 0.5 h, dehydrated at 100° C. for 2 h, and E-44 epoxy resin at 110° C. with a mass of 5 times that of the microcapsules was added, and stirred at 110° C. and 400 rpm for 0.5 h to obtain an outer layer resin glue;

[0029] (2) Acrylic acid, methacrylic acid, styrene, methyl methacrylate, N-hydroxymethyl acrylamide, and OP emulsifier were mixed in a mass ratio of 1:2.2:1.0:1.3:0.8:0.6, and stirred at 400 rpm for 0.5 h to prepare an acrylic emulsion;

[0030] (3) titanate n-propyl, tetramethyl orthosilicate and KH-570 silane coupling agent were added in a mass ratio of 1:3:0.4, mixed to obtain a mixture, added ethanol deionized water solution 4 times the mass of the mixture, the mass ratio of deionized water to ethanol in the ethanol deionized water solution was 1:4, stirred at 500 rpm for 10 min, added glacial acetic acid solution until the solution pH was 5, the mass ratio of glacial acetic acid to deionized water in the glacial acetic acid solution was 1:8, stirred at 500 rpm for 2 h at 45 ° C, filtered, and dried at 70 ° C for 2 h to obtain a silicon-titanium mixture, added large-diameter carbon nanotubes 0.15 times the mass of the silicon-titanium mixture, polyethylene terephthalate 0.004 times the mass of the silicon-titanium mixture 100 times the mass of the pyrrolidone and silicon-titanium mixture in deionized water, stirred ultrasonically at 400 rpm and 40 W for 0.5 h to obtain a slurry, spray-dried to obtain a composite material, added with a deionized ammonium persulfate solution 4 times the mass of the composite material, the mass ratio of ammonium persulfate to deionized water in the deionized ammonium persulfate solution being 1:8, added with an acrylic emulsion 4 times the mass of the composite material, placed in an 80°C water bath, stirred at 400 rpm for 2 h to obtain an acrylic polymer solution; the spray drying parameters are: inlet and outlet temperatures are 170°C and 90°C, respectively, the peristaltic pump feed rate is 8 mL / min, the fan frequency is 35 Hz, and the needle setting is 7;

[0031] (4) Propionic acid and E-44 epoxy resin were added in a mass ratio of 1:12, and the temperature was raised to 140°C at 1°C / min under nitrogen protection and stirring at 400 rpm. After standing until the epoxy resin melted, tetrabutylammonium bromide (0.1 times the mass of the propionic acid) was added, and the temperature was raised to 190°C at 1°C / min. The temperature was kept to react until the acid value dropped to 3 mgKOH / g, and then cooled to 50°C. Ethylene glycol butyl ether solution (1.4 times the mass of the propionic acid) was added, and the mass ratio of ethylene glycol butyl ether to propylene glycol methyl ether in the ethylene glycol butyl ether solution was 1:1 to obtain epoxy ester resin. At 90°C, the acrylic polymer solution was added dropwise at 8 mL / min to the epoxy ester resin (4 times the mass of the acrylic polymer solution) and the temperature was raised to 90°C. The reaction was carried out for 4 hours to obtain the bottom resin glue.

[0032] (5) A base layer of resin glue is applied to one side of the latex paper. The thickness of the base layer of resin glue is 0.8 mm. After sand is planted on the surface of the base layer of resin glue, it is dried and cured at 50°C for 0.5 h. An outer layer of resin glue is applied. The thickness of the outer layer of resin glue is 0.8 mm. It is dried and cured at 50°C for 0.5 h.

[0033] Example 2

[0034] (1) Aluminum oxide was dissolved in an ethanol deionized water solution with a mass ratio of 9 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution was 1:5, and ultrasonic dispersion was performed at 45W for 15 minutes. KH-570 with a mass ratio of 0.1 times that of aluminum oxide was added, and the mixture was reacted at 65°C for 23 hours, filtered, washed with ethanol three times, dried at 75°C for 2.5 hours, and ground through a 120-mesh sieve to obtain nano-aluminum oxide; phenol, formaldehyde, and hydrochloric acid with a mass fraction of 37% were mixed in a mass ratio of 1:0.17:0.09, and reacted at 70°C for 5 hours to obtain a prepolymer, and nano-aluminum oxide with a mass ratio of 0.12 times that of the prepolymer and petroleum ether with a mass ratio of 3 times that of the prepolymer were added to obtain solution A; furfuryl alcohol, hexamethylenetetramine, and dodecyl sulfuric acid were mixed. Sodium and deionized water were mixed in a mass ratio of 1:0.32:0.1:6 to prepare solution B; solution A and solution B were mixed in a mass ratio of 1:0.9, stirred at 650 rpm for 15 min to obtain an emulsion, ultrasonicated at 45W for 0.75 h, reacted under nitrogen for 2.5 h, filtered, and washed 3 times with deionized water to obtain microcapsules, and a urea-formaldehyde resin deionized water solution twice the mass of the microcapsules was added, the mass ratio of urea-formaldehyde resin to deionized water in the urea-formaldehyde resin deionized water solution was 1:1.5, stirred at 650 rpm for 0.5 h, dehydrated at 105°C for 2.5 h, and 120°C E-44 epoxy resin was added at 7.5 times the mass of the microcapsules, and stirred at 120°C and 500 rpm for 0.75 h to obtain the outer layer resin glue;

[0035] (2) acrylic acid, methacrylic acid, styrene, methyl methacrylate, N-hydroxymethyl acrylamide, and OP emulsifier were mixed in a mass ratio of 1:2.4:1.2:1.4:1:0.7, and stirred at 500 rpm for 0.75 h to prepare an acrylic emulsion;

[0036] (3) Titanate n-propyl, tetramethyl orthosilicate and KH-570 silane coupling agent were added in a mass ratio of 1:3.5:0.5, and a mixture was obtained. An ethanol deionized water solution with a mass ratio of 4.5 times the mass of the mixture was added, and the mass ratio of deionized water to ethanol in the ethanol deionized water solution was 1:5. The mixture was stirred at 650 rpm for 15 minutes. An acetic acid solution was added until the pH of the solution was 5. The mass ratio of acetic acid to deionized water in the acetic acid solution was 1:10. The mixture was stirred at 600 rpm for 2.5 hours at 50°C, filtered, and dried at 75°C for 2.5 hours to obtain a silicon-titanium mixture. Large-diameter carbon nanotubes with a mass of 0.17 times the mass of the silicon-titanium mixture and 0.005 times the mass of the silicon-titanium mixture were added. Deionized water 110 times the mass of the polyvinyl pyrrolidone and silicon-titanium mixture was stirred ultrasonically at 500 rpm and 45 W for 0.75 h to obtain a slurry, which was spray-dried to obtain a composite material, and an ammonium persulfate deionized water solution 5 times the mass of the composite material was added, wherein the mass ratio of ammonium persulfate to deionized water in the ammonium persulfate deionized water solution was 1:10, and an acrylic emulsion 5 times the mass of the composite material was added, and the mixture was placed in an 85°C water bath and stirred at 500 rpm for 2.5 h to obtain an acrylic polymer solution; the spray drying parameters were as follows: inlet and outlet temperatures were 180°C and 100°C, respectively, the peristaltic pump feed rate was 10 mL / min, the fan frequency was 40 Hz, and the needle setting was 8;

[0037] (4) Propionic acid and E-44 epoxy resin were added in a mass ratio of 1:14, and the temperature was raised to 150°C at 2°C / min under nitrogen protection and stirring at 500 rpm. After standing until the epoxy resin melted, tetrabutylammonium bromide (0.2 times the mass of the propionic acid) was added, and the temperature was raised to 200°C at 2°C / min. The temperature was kept to react until the acid value dropped to 3 mgKOH / g, and then cooled to 60°C. Ethylene glycol butyl ether solution (1.5 times the mass of the propionic acid) was added, and the mass ratio of ethylene glycol butyl ether to propylene glycol methyl ether in the ethylene glycol butyl ether solution was 1:1.1 to obtain epoxy ester resin. At 100°C, the acrylic polymer solution was added dropwise at 9 mL / min to the epoxy ester resin (5 times the mass of the acrylic polymer solution) and the temperature was raised to 100°C. The reaction was carried out for 5 hours to obtain the bottom resin glue.

[0038] (5) A base layer of resin glue is applied to one side of the latex paper. The thickness of the base layer of resin glue is 1.0 mm. After sand is planted on the surface of the base layer of resin glue, it is dried and cured at 60°C for 0.75 h. An outer layer of resin glue is applied. The thickness of the outer layer of resin glue is 1.0 mm. It is dried and cured at 60°C for 0.75 h.

[0039] Example 3

[0040] (1) Aluminum oxide was dissolved in an ethanol deionized water solution with a mass ratio of 10 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution was 1:6, and ultrasonic dispersion was performed at 50W for 20 minutes. KH-570 with a mass ratio of 0.12 times that of aluminum oxide was added, and the mixture was reacted at 70°C for 24 hours, filtered, washed with ethanol three times, dried at 80°C for 3 hours, and ground through a 140-mesh sieve to obtain nano-aluminum oxide; phenol, formaldehyde, and hydrochloric acid with a mass fraction of 38% were mixed in a mass ratio of 1:0.19:0.1, and reacted at 90°C for 6 hours to obtain a prepolymer, and nano-aluminum oxide with a mass ratio of 0.14 times that of the prepolymer and petroleum ether with a mass ratio of 4 times that of the prepolymer were added to obtain solution A; furfuryl alcohol, hexamethylenetetramine, Sodium lauryl sulfate and deionized water were mixed in a mass ratio of 1:0.34:0.12:7 to prepare solution B; solution A and solution B were mixed in a mass ratio of 1:1, stirred at 800 rpm for 20 min to obtain an emulsion, subjected to 50W ultrasound for 1 h, reacted under nitrogen protection for 3 h, filtered, and washed 3 times with deionized water to obtain microcapsules, and a urea-formaldehyde resin deionized water solution 2.2 times the mass of the microcapsules was added, wherein the mass ratio of urea-formaldehyde resin to deionized water was 1:2, stirred at 800 rpm for 0.5 h, dehydrated at 110°C for 3 h, and E-44 epoxy resin at 130°C was added in an amount 10 times the mass of the microcapsules, and stirred at 130°C and 600 rpm for 1 h to obtain an outer layer resin glue;

[0041] (2) Acrylic acid, methacrylic acid, styrene, methyl methacrylate, N-hydroxymethyl acrylamide, and OP emulsifier were mixed in a mass ratio of 1:2.6:1.4:1.5:1.2:0.8, and stirred at 600 rpm for 1 h to prepare an acrylic emulsion;

[0042] (3) titanate n-propyl, tetramethyl orthosilicate and KH-570 silane coupling agent were added in a mass ratio of 1:4:0.6, and a mixture was obtained. An ethanol deionized water solution with a mass ratio of 6 times the mass of the mixture was added, and the mass ratio of deionized water to ethanol in the ethanol deionized water solution was 1:6. The mixture was stirred at 800 rpm for 20 minutes. An acetic acid solution was added until the pH of the solution was 5, and the mass ratio of acetic acid to deionized water in the acetic acid solution was 1:12. The mixture was stirred at 700 rpm for 3 hours at 55°C, filtered, and dried at 80°C for 3 hours to obtain a silicon-titanium mixture. Large-diameter carbon nanotubes with a mass ratio of 0.19 times the mass of the silicon-titanium mixture and polyethylene with a mass ratio of 0.006 times the mass of the silicon-titanium mixture were added. 120 times the mass of the pyrrolidone and silicon-titanium mixture in deionized water, 600 rpm, 50 W stirring ultrasound for 1 hour to obtain a slurry, spray drying to obtain a composite material, adding 6 times the mass of the composite material in a deionized ammonium persulfate solution, the mass ratio of ammonium persulfate to deionized water in the deionized ammonium persulfate solution being 1:12, adding 6 times the mass of the composite material in an acrylic emulsion, placing in a 90°C water bath, stirring at 600 rpm for 3 hours to obtain an acrylic polymer solution; the spray drying parameters are: inlet and outlet temperatures are 190°C and 110°C, respectively, the peristaltic pump feed rate is 12 mL / min, the fan frequency is 45 Hz, and the needle setting is 9;

[0043] (4) Propionic acid and E-44 epoxy resin were added in a mass ratio of 1:16, and the temperature was raised to 160°C at 3°C / min under nitrogen protection and stirring at 600 rpm. After standing until the epoxy resin melted, tetrabutylammonium bromide (0.3 times the mass of the propionic acid) was added, and the temperature was raised to 210°C at 3°C / min. The temperature was kept to react until the acid value dropped to 3 mgKOH / g, and then cooled to 70°C. Ethylene glycol butyl ether solution (1.6 times the mass of the propionic acid) was added, and the mass ratio of ethylene glycol butyl ether to propylene glycol methyl ether in the ethylene glycol butyl ether solution was 1:1.2 to obtain epoxy ester resin. At 110°C, the acrylic polymer solution was added dropwise at 10 mL / min to the epoxy ester resin (6 times the mass of the acrylic polymer solution) and the temperature was raised to 110°C. The reaction was carried out for 6 hours to obtain the bottom resin glue.

[0044] (5) A base layer of resin glue is applied to one side of the latex paper. The thickness of the base layer of resin glue is 1.2 mm. After sand is planted on the surface of the base layer of resin glue, it is dried and cured at 70°C for 1 hour. An outer layer of resin glue is applied. The thickness of the outer layer of resin glue is 1.2 mm. It is dried and cured at 70°C for 1 hour.

[0045] Comparative Example 1

[0046] The difference between Comparative Example 1 and Example 2 is that step (1) is different. Step (1) is changed to: phenol, formaldehyde, and 37% hydrochloric acid are mixed in a mass ratio of 1:0.17:0.09, reacted at 70°C for 5h to obtain a prepolymer, and petroleum ether 3 times the mass of the prepolymer is added to obtain solution A; furfuryl alcohol, hexamethylenetetramine, sodium lauryl sulfate, and deionized water are mixed in a mass ratio of 1:0.32:0.1:6 to obtain solution B; solution A and solution B are mixed in a mass ratio of 1:0.9, stirred at 650rpm for 15min After 45W ultrasonic treatment for 0.75h, the emulsion was reacted under nitrogen for 2.5h, filtered, and washed three times with deionized water to obtain microcapsules. A deionized water solution of urea-formaldehyde resin (2 times the mass of the microcapsules) was added, with a mass ratio of urea-formaldehyde resin to deionized water of 1:1.5. The mixture was stirred at 650 rpm for 0.5h, dehydrated at 105°C for 2.5h, and then E-44 epoxy resin (7.5 times the mass of the microcapsules) at 120°C was added. The mixture was stirred at 120°C and 500 rpm for 0.75h to obtain the outer layer resin adhesive. The remaining steps were the same as in Example 2.

[0047] Comparative Example 2

[0048] The difference between Comparative Example 2 and Example 2 lies in the difference in step (1), where step (1) is modified as follows: aluminum oxide is dissolved in an ethanol deionized water solution with a mass ratio of 9 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:5, ultrasonically dispersed at 45W for 15 minutes, KH-570 with a mass ratio of 0.1 times that of aluminum oxide is added, reacted at 65°C for 23 hours, filtered, washed with ethanol three times, dried at 75°C for 2.5 hours, and ground through a 120-mesh sieve to obtain nano aluminum oxide; phenol, formaldehyde, and hydrochloric acid with a mass fraction of 37% are mixed in a mass ratio of 1:0.17:0.09, reacted at 70°C for 5 hours to obtain a prepolymer, and nano aluminum oxide with a mass ratio of 0.12 times that of the prepolymer and petroleum ether with a mass ratio of 3 times that of the prepolymer are added to obtain solution A; Hexamethylenetetramine, sodium lauryl sulfate, and deionized water were mixed in a mass ratio of 0.32:0.1:6 to prepare Solution B. Solution A and Solution B were mixed in a mass ratio of 1:0.9 and stirred at 650 rpm for 15 minutes to obtain an emulsion. After ultrasonication at 45W for 0.75 hours, the mixture was reacted under nitrogen for 2.5 hours, filtered, and washed three times with deionized water to obtain microcapsules. A deionized water solution of urea-formaldehyde resin (2 times the mass of the microcapsules) was added, with a mass ratio of urea-formaldehyde resin to deionized water of 1:1.5. The mixture was stirred at 650 rpm for 0.5 hours, dehydrated at 105°C for 2.5 hours, and then 120°C E-44 epoxy resin (7.5 times the mass of the microcapsules) was added. The mixture was stirred at 120°C and 500 rpm for 0.75 hours to obtain the outer layer resin adhesive. The remaining steps were the same as in Example 2.

[0049] Comparative Example 3

[0050] The difference between Comparative Example 3 and Example 2 is that step (1) is different. Step (1) is changed to: dissolve aluminum oxide in an ethanol deionized water solution with a mass ratio of 9 times that of aluminum oxide, the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:5, ultrasonically disperse for 15 minutes at 45W, add KH-570 with a mass ratio of 0.1 times that of aluminum oxide, react at 65°C for 23 hours, filter, wash with ethanol three times, dry at 75°C for 2.5 hours, grind through a 120-mesh sieve to obtain nano aluminum oxide; mix phenol, formaldehyde, and hydrochloric acid with a mass fraction of 37% in a mass ratio of 1:0.17:0.09, react at 70°C for 5 hours to obtain a prepolymer, and add Solution A was prepared by mixing 0.12 times the mass of nano-alumina and 3 times the mass of petroleum ether as the prepolymer. Solution B was prepared by mixing furfuryl alcohol, hexamethylenetetramine, sodium lauryl sulfate, and deionized water in a mass ratio of 1:0.32:0.1:6. Solution A and Solution B were mixed in a mass ratio of 1:0.9 and stirred at 650 rpm for 15 minutes to obtain an emulsion. After ultrasonic treatment at 45W for 0.75 hours, the mixture was reacted under nitrogen for 2.5 hours, filtered, and washed three times with deionized water to obtain microcapsules. 120°C E-44 epoxy resin (7.5 times the mass of the microcapsules) was added, and stirring was maintained at 120°C and 500 rpm for 0.75 hours to obtain the outer layer resin adhesive. The remaining steps were the same as in Example 2.

[0051] Comparative Example 4

[0052] The difference between Comparative Example 4 and Example 2 lies in the difference in step (1). Step (1) is changed to: dissolving aluminum oxide in an ethanol deionized water solution with a mass ratio of 9 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:5, ultrasonically dispersing at 45W for 15min, adding KH-570 with a mass ratio of 0.1 times that of aluminum oxide, reacting at 65°C for 23h, filtering, washing with ethanol 3 times, drying at 75°C for 2.5h, and grinding through a 120-mesh sieve to obtain nano aluminum oxide; adding petroleum ether with a mass ratio of 25 times that of nano aluminum oxide to obtain solution A; mixing furfuryl alcohol, hexamethylenetetramine, sodium lauryl sulfate, and deionized water in a mass ratio of 1:0.32: The mixture was stirred at 650 rpm for 15 minutes to obtain a solution B. The mixture was ultrasonically treated at 45 W for 0.75 hours, and then reacted under nitrogen for 2.5 hours. The mixture was filtered and washed three times with deionized water to obtain microcapsules. A deionized water solution of urea-formaldehyde resin (2 times the mass of the microcapsules) was added, wherein the mass ratio of urea-formaldehyde resin to deionized water was 1:1.5. The mixture was stirred at 650 rpm for 0.5 hours, and dehydrated at 105°C for 2.5 hours. Finally, a 120°C E-44 epoxy resin (7.5 times the mass of the microcapsules) was added, and the mixture was stirred at 120°C and 500 rpm for 0.75 hours to obtain the outer layer resin adhesive. The remaining steps were the same as those in Example 2.

[0053] Comparative Example 5

[0054] Comparative Example 5 differs from Example 2 in step (3). Step (3) is modified as follows: large-diameter carbon nanotubes are added to a deionized ammonium persulfate solution having a mass ratio of 1:10 to ammonium persulfate and deionized water, and an acrylic acid emulsion having a mass ratio of 1:10 to the large-diameter carbon nanotubes is added. The mixture is placed in an 85°C water bath and stirred at 500 rpm for 2.5 hours to obtain an acrylic acid polymer solution. The remaining steps are the same as in Example 2.

[0055] Comparative Example 6

[0056] The difference between Comparative Example 6 and Example 2 is that step (2) is removed and step (3) is changed to: n-propyl titanate, tetramethyl orthosilicate and KH-570 silane coupling agent are added in a mass ratio of 1:3.5:0.5, mixed to obtain a mixture, 4.5 times the mass of the mixture is added to a deionized ethanol solution, the mass ratio of deionized water to ethanol in the deionized ethanol solution is 1:5, stirred at 650 rpm for 15 min, glacial acetic acid solution is added until the solution pH is 5, the mass ratio of glacial acetic acid to deionized water in the glacial acetic acid solution is 1:10, stirred at 600 rpm for 2.5 h at 50 ° C, filtered, and dried at 75 ° C for 2.5 h to obtain a silicon-titanium mixture, 0.17 times the mass of the silicon-titanium mixture of large-diameter carbon nanotubes, 0.005 times the mass of the silicon-titanium mixture of polyvinyl pyrrolidone, and 110 times the mass of the silicon-titanium mixture of deionized water are added, and ultrasonic stirring is carried out at 500 rpm and 45 W for 0.75 h to obtain a slurry, which is spray-dried to obtain a composite material.

[0057] Step (4) was modified as follows: propionic acid and E-44 epoxy resin were added in a mass ratio of 1:14, and the mixture was heated to 150°C at 2°C / min under nitrogen protection and stirring at 500 rpm. The mixture was allowed to stand until the epoxy resin melted, and tetrabutylammonium bromide (0.2 times the mass of the propionic acid) was added. The mixture was heated to 200°C at 2°C / min and kept warm until the acid value dropped to 3 mgKOH / g. The mixture was cooled to 60°C, and an ethylene glycol butyl ether solution (1.5 times the mass of the propionic acid) was added, wherein the mass ratio of ethylene glycol butyl ether to propylene glycol methyl ether was 1:1.1, to obtain an epoxy ester resin. The composite material was added with an epoxy ester resin (5 times the mass of the composite material) at 100°C, and the mixture was heated to 100°C and reacted for 5 hours to obtain a base resin adhesive. The remaining steps were the same as those in Example 2.

[0058] Comparative Example 7

[0059] Comparative Example 7 differs from Example 2 in that step (3) is different. Step (3) is modified as follows: n-propyl titanate, tetramethyl orthosilicate, and KH-570 silane coupling agent are added in a mass ratio of 1:3.5:0.5, mixed to obtain a mixture, 4.5 times the mass of the mixture in deionized ethanol solution, the mass ratio of deionized water to ethanol in the deionized ethanol solution being 1:5, stirred at 650 rpm for 15 min, glacial acetic acid solution is added until the solution pH is 5, the mass ratio of glacial acetic acid to deionized water in the glacial acetic acid solution being 1:10, stirred at 600 rpm for 2.5 h at 50° C., filtered, and dried at 75° C. for 2.5 h to obtain a silicon-titanium mixture, 5 times the mass of the silicon-titanium mixture in deionized ammonium persulfate solution is added, the mass ratio of ammonium persulfate to deionized water in the deionized ammonium persulfate solution being 1:10, an acrylic emulsion is added in an amount of 5 times the mass of the silicon-titanium mixture, and the mixture is placed in an 85° C. water bath and stirred at 500 rpm for 2.5 h to obtain an acrylic polymer solution. The remaining steps are the same as in Example 2.

[0060] Effect Examples

[0061] Table 1 below shows the performance analysis results of the non-deformable and corrosion-resistant sandpapers of Examples 1 to 3 of the present invention and Comparative Examples 1 to 7.

[0062]

[0063] From the comparison of the acid and alkali corrosion experimental data of the comparative examples, it can be found that when the double-layer resin capsule of the present invention encounters a corrosive medium, the urea-formaldehyde resin first decomposes into a gel, isolating the corrosive medium from penetrating into the sandpaper. After the outer capsule layer is repeatedly polished and broken, the heat generated by the polishing prompts the aluminum oxide in the inner capsule layer to absorb acid and alkali, generating aluminum chloride or sodium aluminate, thereby increasing the corrosion resistance of the sandpaper. After the inner capsule layer is further broken, furfuryl alcohol self-polymerizes to form a new resin layer, effectively isolating the corrosive medium and achieving a long-term corrosion resistance of the sandpaper. From the comparison of the cutting force experimental data of the comparative examples, it can be found that the furfuryl alcohol of the present invention can re-reinforce the bonding between the abrasive and the underlying resin glue to achieve better wear resistance. The epoxy group of the epoxy resin and the urea group of the urea-formaldehyde resin react to form a cured product, thereby increasing the thermal curing strength of the outer resin glue and increasing wear resistance. Comparison of the folding endurance experimental data of the comparative examples shows that the present invention carries out in-situ grafting of acrylic acid molecular chains with a three-dimensional spherical skeleton structure as the center, and extends outward with the skeleton, wraps around the large-diameter carbon nanotubes and cross-links with each other to form an acrylic polymer with a hyperbranched structure. The elastic acrylic polymer increases the toughness of the underlying resin glue and reduces the generation of cracks. At the same time, the large-diameter carbon nanotubes increase the strength of the underlying resin glue. The acrylic polymer with a stable three-dimensional spherical skeleton and the large-diameter carbon nanotubes are wrapped with a hyperbranched structure to graft epoxy resin. In the highly cross-linked three-dimensional network structure formed during the thermal curing process of the underlying resin, the long carbon chains, benzene, lipid groups and other groups in the hyperbranched structure increase the sliding between molecular chains, reduce the internal stress of the resin, improve the problems of brittleness and low ductility of the resin after curing, increase toughness, and achieve the function of not being easy to deform.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed therein. Any reference in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A non-deformable and corrosion-resistant sandpaper, characterized in that: The non-deformable and corrosion-resistant sandpaper is made by coating latex paper with a bottom layer of resin glue, planting sand on the surface of the bottom layer of resin glue, and then covering it with an outer layer of resin glue; The outer layer resin glue is made of a double-layer resin capsule and epoxy resin; the double-layer resin capsule is made of furfuryl alcohol as a core material, nano-aluminum oxide hybridized phenolic resin as a wall material, and grafted with urea-formaldehyde resin.

2. The non-deformable and corrosion-resistant sandpaper according to claim 1, characterized in that: The bottom resin adhesive is prepared from a nano silicon titanium mixture made of n-propyl titanate, tetramethyl orthosilicate and KH-570, which is coated with large diameter carbon nanotubes and then grafted with acrylic emulsion and propionic acid modified epoxy resin.

3. The non-deformable and corrosion-resistant sandpaper according to claim 2, characterized in that: The acrylic emulsion is prepared from methacrylic acid, acrylic acid, styrene, methyl methacrylate and N-hydroxymethyl acrylamide.

4. A method for preparing non-deformable and corrosion-resistant sandpaper, characterized in that: The method comprises the following preparation steps: (1) Aluminum oxide is modified with silane to obtain nano-aluminum oxide, which is catalyzed by a mixture of phenol and formaldehyde to obtain a prepolymer, nano-aluminum oxide and petroleum ether are added to obtain solution A, furfuryl alcohol, hexamethylenetetramine, and sodium lauryl sulfate are dissolved in deionized water to obtain solution B; solution A and solution B are mixed to obtain an emulsion, which is then polymerized by nitrogen to obtain microcapsules, and a deionized water solution of urea-formaldehyde resin is added, and hot-melt E-44 epoxy resin is added to obtain an outer layer resin glue; (2) titanate n-propyl, tetramethyl orthosilicate and KH-570 silane coupling agent are mixed to obtain a silicon-titanium mixture, large-diameter carbon nanotubes, polyvinyl pyrrolidone and deionized water are added, mixed evenly to obtain a slurry, spray-dried to obtain a composite material, and ammonium persulfate deionized water solution and acrylic emulsion are added to obtain an acrylic polymer solution; (3) Propionic acid and E-44 epoxy resin are mixed, nitrogen is introduced, tetrabutylammonium bromide is added at elevated temperature, and when the acid value drops to 3 mgKOH / g, the mixture is cooled and ethylene glycol butyl ether solution is added to dissolve the mixture to obtain epoxy ester resin. The acrylic polymer solution is added dropwise to the epoxy ester resin for graft copolymerization, and the mixture is heated to react to obtain a base resin adhesive; (4) Apply a base resin glue on one side of the latex paper, plant sand on the surface of the base resin glue, dry and solidify it, apply an outer layer of resin glue, dry and solidify it, and obtain sandpaper that is not easy to deform and corrosion-resistant.

5. The method for preparing non-deformable and corrosion-resistant sandpaper according to claim 4, characterized in that: The specific preparation steps of the outer layer resin glue in step (1) are as follows: dissolve aluminum oxide in an ethanol deionized water solution with a mass ratio of 8 to 10 times that of aluminum oxide, wherein the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:4 to 1:6, disperse by ultrasonic at 40 to 50W for 10 to 20 minutes, add KH-570 with a mass of 0.08 to 0.12 times that of aluminum oxide, react at 60 to 70°C for 22 to 24 hours, filter, and wash with ethanol 2 to 3 times, 7 Dry at 0~80℃ for 2~3h, grind through 100-140 mesh sieve to obtain nano-aluminum trioxide; mix phenol, formaldehyde and hydrochloric acid with a mass fraction of 36%~38% in a mass ratio of 1:0.15:0.08~1:0.19:0.1, react at 60℃~90℃ for 4~6h to obtain a prepolymer, add 0.1~0.14 times the mass of nano-aluminum trioxide and 2~4 times the mass of petroleum ether to obtain solution A; add furfuryl alcohol and hexamethylenetetramine Tetramine, sodium lauryl sulfate and deionized water were mixed in a mass ratio of 1:0.3:0.08:5-1:0.34:0.12:7 to prepare solution B; solution A and solution B were mixed in a mass ratio of 1:0.8-1:1, stirred at 500-800 rpm for 10-20 min to obtain an emulsion, ultrasonicated at 40-50 W for 0.5-1 h, reacted under nitrogen protection for 2-3 h, filtered, washed with deionized water 2-3 times to obtain microcapsules, and added microcapsules. A urea-formaldehyde resin deionized water solution with a mass of 1.8 to 2.2 times the mass of the capsule, wherein the mass ratio of urea-formaldehyde resin to deionized water is 1:1 to 1:2, is stirred at 500 to 800 rpm for 0.5 h, and dehydrated at 100 to 110° C. for 2 to 3 h. Then, E-44 epoxy resin with a temperature of 110 to 130° C. and a mass of 5 to 10 times the mass of the microcapsules is added, and the mixture is stirred at 110 to 130° C. and 400-600 rpm for 0.5 to 1 h to prepare the outer layer resin glue.

6. The method for preparing the non-deformable and corrosion-resistant sandpaper according to claim 4, characterized in that: The specific preparation steps of the acrylic polymer solution in step (2) are as follows: adding n-propyl titanate, tetramethyl orthosilicate and KH-570 silane coupling agent in a mass ratio of 1:3:0.4 to 1:4:0.6, mixing to obtain a mixture, adding 4 to 6 times the mass of the mixture in an ethanol deionized water solution, the mass ratio of deionized water to ethanol in the ethanol deionized water solution is 1:4 to 1:6, stirring at 500 to 800 rpm for 10 to 20 minutes, adding glacial acetic acid solution until the solution pH is 5, the mass ratio of glacial acetic acid to deionized water in the glacial acetic acid solution is 1:8 to 1:12, stirring at 500 to 700 rpm for 2 to 3 hours at 45°C to 55°C, filtering, and drying at 70 to 80°C for 2 to 3 hours to obtain a silicon-titanium mixture, adding large-diameter carbon nanotubes and silicon-titanium mixture in a mass ratio of 0.15 to 0.19 times the mass of the silicon-titanium mixture. 0.004-0.006 times the mass of polyvinyl pyrrolidone and 100-120 times the mass of the silicon-titanium mixture of deionized water are stirred ultrasonically at 400-600 rpm and 40-50 W for 0.5-1 hour to obtain a slurry, which is spray-dried to obtain a composite material, and 4-6 times the mass of ammonium persulfate deionized water solution of the composite material is added, wherein the mass ratio of ammonium persulfate to deionized water in the ammonium persulfate deionized water solution is 1:8-1:12, and 4-6 times the mass of the composite material is added. Acrylic emulsion is added, and the mixture is placed in a water bath at 80-90° C. and stirred at 400-600 rpm for 2-3 hours to obtain an acrylic polymer solution. The spray drying parameters are as follows: inlet and outlet temperatures are 170-190° C. and 90-110° C., respectively, a peristaltic pump feed rate is 8-12 mL / min, and a fan frequency is 35-45 Hz.

7. The method for preparing the non-deformable and corrosion-resistant sandpaper according to claim 6, characterized in that: The preparation method of the acrylic emulsion comprises: mixing acrylic acid, methacrylic acid, styrene, methyl methacrylate, N-hydroxymethyl acrylamide, and OP emulsifier in a mass ratio of 1:2.2:1.0:1.3:0.8:0.6-1:2.6:1.4:1.5:1.2:0.8, and stirring at 400-600 rpm for 0.5-1 hour to prepare the acrylic emulsion.

8. The method for preparing non-deformable and corrosion-resistant sandpaper according to claim 4, characterized in that: The specific preparation steps of the bottom resin glue in step (3) are as follows: add propionic acid and E-44 epoxy resin in a mass ratio of 1:12~1:16, under nitrogen protection and stirring at 400~600rpm, heat to 140~160℃ at 1~3℃ / min, let it stand until the epoxy resin melts, add tetrabutylammonium bromide with a mass of 0.1~0.3 times that of propionic acid, heat to 190~210℃ at 1~3℃ / min, and keep warm to react until the acid value drops to 3mgKO H / g, cool to 50-70°C, add ethylene glycol butyl ether solution with the mass of 1.4-1.6 times that of propionic acid, the mass ratio of ethylene glycol butyl ether and propylene glycol methyl ether in the ethylene glycol butyl ether solution is 1:1-1:1.2, to obtain epoxy ester resin, at 90-110°C, add the acrylic polymer solution dropwise at 8-10 mL / min to the epoxy ester resin with the mass of 4-6 times that of the acrylic polymer solution, heat to 90-110°C, react for 4-6 hours, and obtain the bottom resin glue.

9. The method for preparing non-deformable and corrosion-resistant sandpaper according to claim 4, characterized in that: The specific preparation steps of the non-deformable and corrosion-resistant sandpaper in step (4) are as follows: a bottom layer of resin glue is coated on one side of the latex paper, the thickness of the bottom layer of resin glue is 0.8~1.2mm, sand is planted on the surface of the bottom layer of resin glue, and then it is dried and cured at 50~70℃ for 0.5~1h, and an outer layer of resin glue is coated, the thickness of the outer layer of resin glue is 0.8~1.2mm, and then it is dried and cured at 50~70℃ for 0.5~1h.

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