Graphene nano titanium alloy epoxy polymer and preparation method thereof

Abstract

The invention relates to the technical field of polymer / nano inorganic matter composite materials, in particular to a graphene nano titanium alloy epoxy polymer and a preparation method thereof.The graphene nano titanium alloy epoxy polymer is prepared from epoxy resin, liquid polysulfide rubber, metal titanium powder, high-purity graphite powder, a silane coupling agent, polyvinylpyrrolidone, organobentonite and a mixed solvent; after freezing treatment of high-purity graphite powder and preparation of a polymer solution, the polymer solution, metal titanium powder and the frozen high-purity graphite powder are put into a planetary ball mill for ball milling, and the graphene / nano titanium alloy epoxy polymer is prepared. The graphene nano titanium alloy epoxy group polymer prepared by the invention is matched with an epoxy curing agent to prepare a special anticorrosive coating, and the special anticorrosive coating has the advantages of temperature resistance, weather resistance, stain resistance, excellent mechanical properties and ultrahigh heavy corrosion resistance. A certain amount of graphene / nano titanium alloy epoxy polymer is added into the conventional epoxy anticorrosive paint, so that the comprehensive performance of the conventional epoxy anticorrosive paint can be remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polymer / nano-inorganic material composite, in particular to a graphene nano-titanium alloy epoxy-based polymer and a preparation method thereof. BACKGROUND

[0002] Compared with unmodified polymers, polymer / nano-inorganic material composites have many excellent properties. In the case of a small amount of nano-inorganic material, the mechanical properties and thermal properties of the composite material are obviously improved. However, the polymer / nano-inorganic material composite prepared by physical mixing or melt mixing only uniformly disperses the nano-inorganic particles in the polymer, and cannot effectively solve the combination of the interface morphology and interface structure of the inorganic nano-particles and the polymer, and cannot form chemical grafting reaction and chemical bonding between the two, which has certain limitations for improving the performance of the composite material. SUMMARY

[0003] To solve the problem that the performance of the material is limited due to the lack of interfacial bonding in the existing polymer / inorganic nano-composite material, the present application provides a graphene nano-titanium alloy epoxy-based polymer, which solves the problems in the background art.

[0004] To achieve the above purpose, the present application provides the following technical scheme: On the one hand, the present application provides a graphene nano-titanium alloy epoxy-based polymer, which comprises the following components in mass fraction ratio: epoxy resin 20-50 parts, liquid polysulfide rubber 5-15 parts, titanium powder 10-30 parts, high-purity graphite powder 1-5 parts, silane coupling agent 0.2-1.0 parts, polyvinylpyrrolidone 0.2-1.0 parts, organic bentonite 0.5-1.5 parts, and mixed solvent 30-40 parts.

[0005] The mixed solvent comprises the following components in mass fraction ratio: dimethylbenzene 2 parts, butanol 1 part.

[0006] On the other hand, the present application provides a preparation method of a nano-modified polyaspartic acid ester heavy-duty anticorrosive coating, which is used for preparing the above-mentioned graphene nano-titanium alloy epoxy-based polymer, and comprises the following steps: Step 1, high-purity graphite powder cold treatment: the high-purity graphite powder is frozen in a-20℃ environment for more than 12h, and is ready for use; Step 2, preparation of polymer solution: weigh the components according to the proportion, add the mixed solvent into a stirring tank, and then add the epoxy resin, liquid polysulfide rubber, silane coupling agent, polyvinylpyrrolidone and organic bentonite under stirring to dissolve uniformly and prepare a polymer solution; Step 3, preparation of graphene / nano titanium alloy epoxy polymer: the polymer solution, metal titanium powder, and frozen high-purity graphite powder are loaded into a ball milling tank of a planetary ball mill, so that the ball-to-material ratio is 4:1, the rotation speed is adjusted to 600 r / min, and the grinding is performed for 6 h, and then the graphene / nano titanium alloy epoxy polymer is prepared by ultrasonic disperser for 0.5 h, filtration, and particle size between 50 nm and 80 nm.

[0007] Compared with the prior art, the graphene / nano titanium alloy epoxy polymer and the preparation method thereof have the following beneficial effects: The graphene / nano titanium alloy epoxy polymer prepared by the method has excellent mechanical properties, super high corrosion resistance, and the special corrosion-resistant coating prepared by adding the graphene / nano titanium alloy epoxy polymer into conventional epoxy corrosion-resistant coating can significantly improve the comprehensive performance of the conventional epoxy corrosion-resistant coating. DETAILED DESCRIPTION

[0008] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0009] In the embodiments, the present application provides a technical solution: The embodiments of the present application provide a graphene / nano titanium alloy epoxy polymer, which comprises the following components in parts by mass: 20-50 parts of epoxy resin, 5-15 parts of liquid polysulfide rubber, 10-30 parts of metal titanium powder, 1-5 parts of high-purity graphite powder, 0.2-1.0 parts of silane coupling agent, 0.2-1.0 parts of polyvinylpyrrolidone, 0.5-1.5 parts of organic bentonite, and 30-40 parts of mixed solvent.

[0010] In the present application, the epoxy resin is preferably epoxy resin E44, the liquid polysulfide rubber is preferably liquid polysulfide rubber JLY-121, and the silane coupling agent is preferably silane coupling agent KH-560. In the present application, the mixed solvent comprises the following components in parts by mass: 2 parts of dimethylbenzene and 1 part of butanol.

[0011] In the present application, the epoxy resin E44 contains active epoxy groups in the molecular structure, and can cross-link with various types of curing agents to form insoluble and infusible polymers with three-dimensional network structure. The epoxy resin E44 has excellent physical and mechanical properties, electrical insulation properties, chemical corrosion resistance, heat resistance and bonding properties, and can be used to prepare adhesives, coatings and the like, and can be widely used in the fields of chemical industry, light industry, water conservancy, transportation, machinery and electronic industry.

[0012] In the present application, the liquid polysulfide rubber JLY-121 is a light brown transparent viscous or viscous liquid, with a glass transition temperature of -76 to -40℃, a brittle temperature of -65 to -55℃, and a use temperature of -55 to 100℃. It has excellent properties such as oil resistance, solvent resistance, acid resistance, alkali resistance, seawater corrosion resistance, ultraviolet light resistance and high energy radiation resistance, as well as excellent air tightness, low temperature flexibility, good adhesion to metal and non-metal materials, and good compatibility with epoxy resin. It is often used as a toughening agent for epoxy resin. Its coating is widely used in the fields of building, aviation, aerospace, shipbuilding, electromechanical instruments, automobiles, railways, water conservancy and petroleum chemical industry.

[0013] The metal titanium powder is a high-strength but low-mass metal among metal elements, and has good ductility. Its melting point is more than 1647℃, it is a good refractory metal material, and has paramagnetism, and both its electrical conductivity and thermal conductivity are very low. Commercial grade titanium (purity 99.2%) has an ultimate tensile strength of about 434 megapascals, which is comparable to low-grade steel alloys, but is 45% lighter than steel alloys. The density of titanium is 60% higher than that of aluminum, but the strength is twice that of common 6061-T6 aluminum alloy. Titanium can be used in various alloys. The tensile strength of some titanium alloys (such as beta C) reaches 1,400 megapascals. Titanium has excellent corrosion resistance - its corrosion resistance is almost as good as platinum, titanium is not corroded by dilute sulfuric acid, dilute hydrochloric acid, chlorine, chlorine solution and most organic acids, but can still be dissolved by concentrated acid.

[0014] In the present application, the nano-titanium is obtained by converting mechanical energy into heat energy at the contact points of titanium powder and balls and cylinder during high-speed ball milling of metal titanium in a ball mill. The titanium powder particles are expanded and cracked, and the titanium powder undergoes severe plastic deformation under the action of high impact force and shear force, resulting in crystal lattice sliding, fragmentation, and the formation of a large number of dislocations, stacking faults, and twin crystals and other defects inside, which reduces the crystal symmetry, reduces the grain size to nanoscale, increases the lattice distortion, and activates the surface.

[0015] In the present application, the high-purity graphite powder (graphene oxide) refers to natural crystalline graphite with a carbon content of >99.99% of graphite, which is fishbone-shaped and belongs to hexagonal system, and has good high-temperature resistance, electrical conductivity, thermal conductivity, lubricity, plasticity, acid and alkali resistance and other properties.

[0016] In the application, the graphene oxide is obtained by the following steps: high-purity graphite is pre-frozen, and then expanded and loosened in a ball mill tank under high temperature and high pressure during high-speed ball milling of the ball mill, the interlayer bonding force is weakened, a polymer penetrates and intercalates into the expanded graphite interlayer by means of a solvent, the graphite is peeled off into flaky nanoscale graphene by mechanical force, and the graphene is oxidized with air under high temperature and high pressure in the ball mill tank to generate high-purity graphene, and a large number of active functional groups such as hydroxyl, carboxyl, epoxy and carbonyl exist on the surface of the high-purity graphene.

[0017] In the application, the graphene oxide is a single-layer carbon atom material peeled off from graphite material, is a new type of planar film with a honeycomb lattice of hexagons composed of SP2 hybrid orbitals of carbon atoms, is the thinnest and hardest nanomaterial in the world, has a hardness higher than that of diamond, and can be stretched like rubber. The graphene has ultrahigh specific surface area (the theoretical value is about 2600 m2 / g) and excellent heat resistance, mechanical strength and gas barrier property. The strength of the graphene is 100 times higher than that of the best steel in the world. The nanometer graphene particles are filled in the gaps between the coarse particles of pigments and fillers and between the pigments and fillers and the film-forming substances to form strong active adsorption centers and generate bonding on the surface of the coating film, so that the compactness, toughness, mechanical strength, erosion resistance and stain resistance of the coating film are greatly improved. The graphene is a nanometer modifier with small dosage and high efficiency.

[0018] In the application, the graphene / nano-titanium alloy (graphene / nano-titanium alloy epoxy polymer) generates a mechanical chemical effect during high-speed ball milling of the ball mill, and the active nano-titanium is easily adsorbed and loaded on the surface of the graphene sheet with functional groups to form nano-titanium loaded high-purity graphene, which together with the nano-titanium not loaded forms the graphene / nano-titanium alloy.

[0019] In the application, the graphene / nano-titanium alloy epoxy polymer is obtained by the following steps: an epoxy resin, liquid polysulfide rubber, high-purity graphite, titanium powder, an additive and a solvent are jointly subjected to high-energy ball milling of the ball mill. When the organic resin is subjected to high impact force and shearing force, chemical changes such as cracking, structure change, ionization and isomerization can be caused, chain breaking, unsaturated bonds, free ions and electrons are generated, the inorganic nano-particles are easily branched and crosslinked, the amphiphilic property of the coupling agent can couple and bridge the organic-inorganic interface, and the dispersion effect of polyvinylpyrrolidone is used to form the stable graphene / nano-titanium alloy epoxy polymer.

[0020] In the application, the coupling agent KH-560 (silane coupling agent) is an epoxy group-containing coupling agent, which is soluble in water and can react with water to release methanol. It is soluble in alcohol, acetone and most aliphatic, ester and the like (when the dosage is below 5%). The silane coupling agent KH-560 enhances the electrical properties of epoxy resin-based electronic sealants and encapsulating materials and printed circuit boards, improves the dispersibility of pigments and fillers in coatings, and improves the adhesion between resin and substrate, resin and inorganic pigments and fillers.

[0021] In the application, the polyvinylpyrrolidone, referred to as PVP for short, is a non-ionic high molecular compound, which is easily soluble in water, halogenated hydrocarbon solvents, alcohols, amines, nitroalkanes and low molecular fatty acids, and insoluble in a small number of solvents such as acetone, diethyl ether, turpentine, aliphatic hydrocarbons and alicyclic hydrocarbons. It is compatible with most inorganic acid salts and various resins. In coatings, it has the functions of wetting, dispersing, colloidal protection, film forming, adhesion, moisture absorption, solubilization or condensation, etc.

[0022] In the application, the organic bentonite is an inorganic mineral / organic ammonium composite, which is prepared by using bentonite as raw material, inserting an organic coating agent into the layered structure of montmorillonite in bentonite and its property of swelling and dispersing into colloidal particles in water or organic solvents through ion exchange technology. The organic bentonite can form a gel in various organic solvents, oils and liquid resins, and has good thickening property, thixotropy, suspension stability, high temperature stability, lubricity, film forming property, water resistance and chemical stability, and has important application value in the coating industry.

[0023] In the application, the xylene and butanol are both common solvents for coatings, which have the functions of dissolving and diluting.

[0024] The application also provides a preparation method of the graphene nanometer titanium alloy epoxy-based polymer. Embodiment

[0025] A preparation method of a graphene nanometer titanium alloy epoxy-based polymer, In this embodiment, the composition and ratio of the graphene nanometer titanium alloy epoxy-based polymer, in terms of mass fraction, include the following components: 25 parts of epoxy resin, 5 parts of liquid polysulfide rubber, 20 parts of titanium powder, 5 parts of high-purity graphite powder, 0.5 parts of silane coupling agent, 1.0 parts of polyvinylpyrrolidone, 1.0 parts of organic bentonite, 15.5 parts of xylene and 14.5 parts of butanol.

[0026] The method includes the following steps: Step 1: graphite powder freezing treatment: put the high-purity graphite powder into a-20℃ environment and freeze for more than 12h, and then prepare for use; Step 2, preparation of polymer solution: according to the formula, the mixed solvent is weighed and added into a stirring tank, the epoxy resin E44, liquid polysulfide rubber JLY-121, coupling agent KH-560, polyvinylpyrrolidone and organic bentonite are added under stirring to dissolve uniformly to prepare a polymer solution; Step 3, preparation of graphene / nano titanium alloy epoxy-based polymer: the polymer solution, titanium powder and frozen graphite powder are loaded into a ball milling tank of a planetary ball mill, the ball-to-material ratio is 4:1, the rotation speed is adjusted to 600 r / min, the grinding is performed for 6 h, and then ultrasonic dispersion is performed for 0.5 h by using an ultrasonic disperser, filtration is performed, the particle size is between 50 nm and 80 nm, and the graphene / nano titanium alloy epoxy-based polymer is prepared. Embodiment

[0027] The application also provides a preparation method of the graphene / nano titanium alloy epoxy-based polymer, and the steps of the preparation method of the graphene / nano titanium alloy epoxy-based polymer provided in the embodiment are the same as those in Embodiment 1; and the composition and the ratio of the graphene / nano titanium alloy epoxy-based polymer provided in the embodiment are different from those in Embodiment 1.

[0028] In the embodiment, the graphene / nano titanium alloy epoxy-based polymer comprises the following components in a mass ratio: 30 parts of epoxy resin, 7 parts of liquid polysulfide rubber, 17 parts of titanium powder, 4 parts of high-purity graphite powder, 0.5 part of silane coupling agent, 0.5 part of polyvinylpyrrolidone, 1.0 part of organic bentonite, 26 parts of dimethylbenzene and 14 parts of butanol. Embodiment

[0029] The application also provides a preparation method of the graphene / nano titanium alloy epoxy-based polymer, and the steps of the preparation method of the graphene / nano titanium alloy epoxy-based polymer provided in the embodiment are the same as those in Embodiment 1; and the composition and the ratio of the graphene / nano titanium alloy epoxy-based polymer provided in the embodiment are different from those in Embodiment 1.

[0030] In the embodiment, the graphene / nano titanium alloy epoxy-based polymer comprises the following components in a mass ratio: 30 parts of epoxy resin, 7 parts of liquid polysulfide rubber, 17 parts of titanium powder, 4 parts of high-purity graphite powder, 0.5 part of silane coupling agent, 0.5 part of polyvinylpyrrolidone, 1.0 part of organic bentonite, 26 parts of dimethylbenzene and 14 parts of butanol. Embodiment

[0031] The application also provides a preparation method of the graphene / nano titanium alloy epoxy-based polymer, and the steps of the preparation method of the graphene / nano titanium alloy epoxy-based polymer provided in the embodiment are the same as those in Embodiment 1; and the composition and the ratio of the graphene / nano titanium alloy epoxy-based polymer provided in the embodiment are different from those in Embodiment 1.

[0032] The graphene / nano-titanium alloy epoxy-based polymer provided by the present application comprises the following components in parts by mass: 36 parts of epoxy resin, 7 parts of liquid polysulfide rubber, 16 parts of titanium powder, 3 parts of high-purity graphite powder, 0.5 parts of silane coupling agent, 1.0 part of polyvinylpyrrolidone, 1.0 part of organic bentonite, 22 parts of dimethylbenzene, and 11.5 parts of butanol.

[0033] The reaction mechanism of the graphene / nano-titanium alloy epoxy-based polymer Basic principle of high-energy ball milling: When high-speed ball milling is performed on a planetary ball mill, most of the graphite powder and titanium powder are distributed on the inner wall of the ball mill due to the effects of the centrifugal force of revolution, the centrifugal force of rotation, and the Coriolis force. The high-speed collision of the grinding balls against the inner wall of the ball mill and the strong contact extrusion of the large-mass grinding balls against the inner wall of the ball mill due to the high centrifugal force cause the titanium powder and the graphite powder to repeatedly undergo cold welding, crushing, falling off, and cold welding. At the same time, the high-speed collision and strong extrusion between the grinding balls also cause the titanium powder and the graphite powder dispersed in the internal space of the ball mill to repeatedly undergo the above deformation and interaction. All the above effects cause the powder to undergo severe plastic deformation and form a large number of defects such as dislocations, stacking faults, and twins in the interior, greatly reducing the symmetry of the crystal structure of the graphite and titanium powder and continuously refining the particles; and the layered structure of the graphite is separated and oxidized into graphene oxide by air.

[0034] The process of the titanium powder and the graphite powder subjected to mechanical force is a combination of multiple phenomena. First, the powder is subjected to force, the particles are broken, refined, and the material specific surface area is increased, forming a large number of sub-grain boundaries and phase boundaries. Correspondingly, the degree of crystallization of the crystal greatly declines, defects are generated in the crystal lattice and cause lattice displacement, and the system temperature rises. The increase in the fresh surface, the increase in atomic activity, the strengthening of diffusion ability, and the shortening of diffusion distance result in the increase in the free energy or activity of the powder system.

[0035] Mechanical chemical effect on the graphite / titanium powder High-energy ball milling not only reduces the particle size but also changes the lattice spacing of the crystal grains. With high-energy ball milling, the particle size is reduced to several or tens of nanometers, the plastic strain and dislocation caused by high-energy ball milling, and the huge pressure generated by high-energy collision cause the crystal grain boundaries and lattice constants to change, i.e., the lattice is distorted.

[0036] The impact force, shear force, and pressure generated by high-energy ball milling all cause plastic deformation, which is essentially the multiplication and movement of dislocations. Plastic deformation of the particles requires consumption of mechanical energy, and at the same time, energy is stored at the dislocations, which forms a mechanical chemical activation point, thereby increasing and changing the chemical reaction activity of the material.

[0037] Titanium metal and graphite are less dense and soft in texture. When high-energy ball milling, the mechanical energy is converted into heat energy at the contact point of raw materials and balls and cylinder. The powder particles are expanded and cracked. At the same time, the powder is seriously deformed under the action of high impact force and shear force. The crystal lattice is slipped, broken, and a large number of defects such as dislocations, stacking faults, and twins are formed inside, which reduces the symmetry of the crystal, reduces the grain size, and increases the lattice distortion. The surface is activated.

[0038] The frozen graphite powder expands and loosens under high temperature and high pressure in the ball milling tank. The interlayer bonding force is weakened. The polymer penetrates and intercalates into the expanded graphite interlayer with the help of the solvent. The graphite is peeled into flaky nanoscale graphene by mechanical force. The graphene is oxidized with air under high temperature and high pressure in the ball milling tank to form graphene oxide, which has a large number of active functional groups such as hydroxyl, carboxyl, epoxy, and carbonyl groups on the surface. Active nanometer titanium is easily adsorbed and loaded on the surface of the graphene sheet to form nanometer titanium loaded graphene oxide, and the active groups and free radicals or free ions generated by polymer chain scission occur grafting reaction.

[0039] Mechanical chemical effect on the mechanism of action of polymer: Under the action of mechanical chemical, the bond of polymer will be broken to produce macromolecular free radicals. If small molecules are encountered at this time, high molecular polycondensation can occur. The bond energy of long-chain structure polymer is small, far smaller than the mechanical energy generated by high-energy ball milling. Therefore, when the polymer is subjected to high impact force and shear force, chemical changes such as cracking, structure change, ionization, and isomerization can occur, and free radicals, free ions, and electrons are generated. The hydrophilic end of the coupling agent is easily activated in the presence of free electrons or ions.

[0040] Formation mechanism of graphite / nanometer titanium modified polymer: Mechanical chemistry causes lattice distortion and defects on the surface of graphite and titanium powder, increases the surface free energy, causes bond breaking and recombination, and can produce unsaturated bonds and positive and negative regions on the fresh fracture surface, which can cause grafting of inorganic matter and high molecular polymer to achieve the purpose of modification.

[0041] The electron configuration of titanium element is (Ar) 3d 3 4s 2. The arrangement of its own electron orbit makes it easy to react with free radicals or groups containing lone pair electrons. Graphene oxide contains a large number of oxygen-containing functional groups, including hydroxyl, epoxy functional groups, carbonyl, and carboxyl groups. It is easy to react with activated titanium metal and organic functional groups.

[0042] Under the high-energy ball milling, the lattice of graphite and titanium powder is distorted and dislocated, the surface forms the mechanical chemical activation point, the polymer chain is broken, and the free ion and electron unstable state are generated, when the internal energy of the system is greater than the energy required by the combination of graphite and titanium powder with the polymer and coupling agent, the titanium powder reacts with or chemically adsorbs with the two to reduce the internal energy of the system, so that the graphite / nano titanium modified polymer with small particle size and storage stability is formed.

[0043] In the high-energy ball milling process of high-purity graphite powder, the nanoscale graphene oxide is formed through crushing, expansion, intercalation, exfoliation, activation and oxidation.

[0044] In the high-energy ball milling process of titanium powder, the nanometer titanium is formed through plastic deformation, grain size reduction, lattice distortion and surface activation; the active functional groups on the surface of the graphene oxide sheet are adsorbed and linked with part of the active nanometer titanium through reaction, forming the graphene oxide loaded nanometer titanium alloy, which reacts with another part of the active nanometer titanium and the broken epoxy resin to form the graphene / nanometer titanium alloy epoxy-based polymer.

[0045] The graphene / nanometer titanium alloy epoxy-based polymer prepared by the application, together with the epoxy curing agent, is used to prepare a special anti-corrosion coating, which has the properties of temperature resistance, weather resistance, stain resistance, excellent mechanical properties and super high anti-corrosion property. Adding a certain amount of graphene / nanometer titanium alloy epoxy-based polymer to the conventional epoxy anti-corrosion coating can significantly improve the comprehensive performance of the conventional epoxy anti-corrosion coating. The graphene / nanometer titanium alloy epoxy-based polymer with different mass fractions is contained in an epoxy anti-corrosion primer, and the changes of the main performance of the coating film are shown in the following table: Effect of graphene / nanometer titanium alloy epoxy-based polymer content on the performance of the coating film In the application, high-purity graphite powder and metal titanium powder are ball milled with epoxy resin by a high-energy ball mill, the mechanical energy is converted into heat energy, the temperature in the ball mill tank increases, the internal pressure increases, the graphite and titanium powder particles are expanded and cracked, and under the action of high impact force and shear force, the particles seriously deform plastically, the lattice slides, breaks and forms a large number of defects such as dislocations, layer faults and twins in the interior, so that the crystal symmetry decreases, the grain size decreases, becomes a nanoscale sheet structure, the lattice distortion increases, and the surface is activated; at the same time, under the action of high impact force and shear force, the free radicals or free ions generated by the chain scission of the epoxy resin can easily graft with the activated inorganic nanosheet to generate the graphene / nanometer titanium alloy epoxy-based polymer. Adding an appropriate amount of the epoxy-based polymer to the ordinary epoxy anti-corrosion coating can prepare a high-temperature resistant, super-weather resistant and heavy anti-corrosion coating.

[0046] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it should be taken in a descriptive sense and not a limiting sense.

[0047] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, substitutions, and alterations can be made to the embodiments of the application without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A graphene-based nano-titanium alloy epoxy polymer, characterized in that: By mass percentage, it includes the following components: 20-50 parts epoxy resin, 5-15 parts liquid polysulfide rubber, 10-30 parts titanium powder, 1-5 parts high-purity graphite powder, 0.2-1.0 parts silane coupling agent, 0.2-1.0 parts polyvinylpyrrolidone, 0.5-1.5 parts organic bentonite, and 30-40 parts mixed solvent.

2. The graphene nano-titanium alloy epoxy polymer as described in claim 1, characterized in that, The mixed solvent comprises the following components in parts by mass: 2 parts xylene and 1 part butanol.

3. The method for preparing graphene nano-titanium alloy epoxy polymer according to any one of claims 1-2, characterized in that, Includes the following steps: Step 1, high-purity graphite powder freezing treatment: Freeze the high-purity graphite powder in an environment of -20℃ for more than 12 hours, and set aside for later use; Step 2, preparation of polymer solution: Weigh the mixed solvent according to the proportion and add it to the mixing tank. While stirring, add epoxy resin, liquid polysulfide rubber, silane coupling agent, polyvinylpyrrolidone, and organobentonite. Stir until the mixture is evenly dissolved to prepare a polymer solution. Step 3, Preparation of graphene / nano-titanium alloy epoxy polymer: The polymer solution, metallic titanium powder, and cryogenically treated high-purity graphite powder are loaded into the ball mill jar of a planetary ball mill, with a ball-to-material ratio of 4:

1. The rotation speed is adjusted to 600 r / min, and the mixture is ground for 6 hours. Then, it is dispersed by an ultrasonic disperser for 0.5 hours and filtered. The particle size is between 50 nm and 80 nm, thus preparing the graphene / nano-titanium alloy epoxy polymer.