1269 results about "Aqueous dispersion" patented technology

The invention discloses a pure bio-based polyhydroxyalkanoate adhesive as well as preparation and application thereof, and belongs to the technical field of degradable adhesives. According to the adhesive, polyhydroxybutyrate valerate or polyhydroxybutyrate hexanoate is used as a matrix, and the acid value reaches 2-15 mg KOH / g through molten end group activation; a reactive emulsifier with a hydrophilic-lipophilic balance value of 9-12 is introduced into a water phase, and the stable aqueous dispersion is prepared through phase inversion high-shear emulsification. The Z-average particle size of the dispersion is 0.12-0.30 [mu] m, and the content of the free surfactant is not higher than 30wt%. After the tackifying resin, the plasticizer and the vegetable wax are compounded, the bio-based carbon content of the obtained adhesive is not lower than 95%, and the volatile organic compound content is not higher than 100 mg / kg. The paper / paper heat sealing strength of the adhesive is not lower than 7.0 N / 15mm, the 180-degree peel strength is not lower than 7.5 N / 25mm, and the adhesive can pass repulping evaluation.

A production method for an aqueous dispersion according to the present invention comprises polymerizing a first monomer that includes tetrafluoroethylene in the presence of a compound represented by formula (X) and a polymerization initiator under conditions in which an aqueous medium is present but an emulsifier that includes fluorine atoms is substantially absent to produce an aqueous dispersion that includes particles of a first fluorine-containing polymer that has an average particle diameter of no more than 500 nm and does not have a melting point.　Formula (X): C(X1)(X2)=C(X3)-L-Z. In formula (X), X1, X2, and X3 are each independently a hydrogen atom, a fluorine atom, a perfluoromethyl group, or an alkyl group, L is a single bond or a divalent linking group, and Z is an anionic group or a salt of an anionic group.

The present invention relates to the technical field of water-based coatings, and specifically to a PHA water-based coating, a preparation method and application thereof. The PHA water-based coating comprises the following raw materials: a PHA water-based dispersion, an emulsifier, a thickener, a film-forming aid and a leveling agent; wherein the PHA water-based dispersion is obtained by a PHA fermentation broth through a wall-breaking treatment. The present invention directly prepares the PHA water-based coating by using the PHA water-based dispersion obtained by fermentation and wall-breaking treatment upstream, and can prepare a PHA water-based coating that is not easy to settle, has good storage stability, is uniformly dispersed and has a small particle size.

The invention discloses a positive electrode material for a zinc-bromine flow battery and a preparation method and application thereof, and belongs to the technical field of zinc-bromine flow batteries, the preparation method comprises the following steps: crushing and sieving an active carbon source, adding the active carbon source into a graphene oxide aqueous dispersion, stirring, centrifuging, removing supernate, drying, mixing with an activating agent, and activating in an inert atmosphere; washing to be neutral, drying and sieving to obtain a graphene / activated carbon composite material; and attaching the graphene / activated carbon composite material to a carbon-plastic bipolar plate to obtain the positive electrode material for the zinc-bromine flow battery. A graphene / activated carbon composite system is combined with a high-conductivity network, graded holes and surface functional groups, so that the reaction kinetics bottleneck of a traditional carbon material Br2 is broken through.

The invention discloses a pure bio-based PHA aqueous dispersion as well as a preparation method and application thereof, and belongs to the technical field of pure bio-based polymer aqueous dispersion. According to the dispersion, polyhydroxyalkanoate is used as a unique film forming matter, Pickering solid particles and a natural surfactant are adopted for synergistic stabilization, and a bio-based plasticizer can be selected. The emulsion or slurry with the polyhydroxyalkanoate content of 40-85wt% and the particle size of 0.2-3m is prepared through a melting high-pressure homogenization method, a low-temperature wet grinding method or a solvent replacement method. The coating does not contain petrochemical polymer protective colloid and perfluorinated and polyfluoroalkyl substances, and the bio-based content is greater than or equal to 99%. Due to the excellent stability, rheological property and film-forming property of the modified starch, the modified starch becomes an ideal basic material for constructing a multi-layer programmable controlled release and degradation functional coating system, can be used in the fields of paper-based barrier coatings, adhesives, advanced crop seed coats and the like, realizes excellent barrier, bonding and controlled release properties, meets the industrial compost and repulping property standards, and has wide application prospects. The method has green, environment-friendly and industrial potential.

The invention provides a PHA dispersion emulsion as well as a preparation method and application thereof, and belongs to the field of high polymer materials. The invention aims to solve the technical problem that the prior art cannot simultaneously meet the requirements of the polyhydroxyalkanoate water dispersion system on extremely low temperature natural film-forming property, excellent comprehensive performance after film formation and long-term storage stability. The method is characterized in that a polyhydroxyalkanoate polymer with specific molecular weight and polydispersity index range, a coalescing agent 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate with a specific chemical structure and a specific type of aliphatic polyisocyanate cross-linking agent compatible with water dispersion are strictly limited and combined. Through the synergistic effect generated by the unique ternary combination, the minimum film forming temperature of the prepared emulsion can be reduced to 6-10 DEG C, a film can be naturally formed without hot pressing, and the formed film has excellent mechanical property, water resistance and adhesive force and has excellent storage stability of at least one year.

The invention provides a supramolecular hydrogel packer constructed by interaction of a subject and an object as well as a preparation method and application of the supramolecular hydrogel packer, and belongs to the technical field of drilling fluid packing. The supramolecular hydrogel packer constructed by interaction of the subject and the guest comprises the following raw materials in percentage by mass: 12-36% of a copolymerization monomer, 6-10% of a tannic acid grafted polysaccharide aqueous dispersion, 0.5-1.5% of an initiator, 0.3-0.6% of a cross-linking agent and the balance of water, the total amount of the components is 100%. The raw materials are cheap, easy to obtain, simple in composition, low in cost, green, safe and environment-friendly; the preparation method is simple, mild in condition and easy to implement. After crosslinking, the obtained packer has excellent mechanical properties, temperature and pressure resistance and outstanding pH degradation capability, and can effectively pack a crude oil reservoir to form an integral sealing interlayer, so that heavy oil entering a shaft is reduced; meanwhile, degradation of the hydrogel can be effectively realized, and deblocking is achieved.

The invention discloses a gas-sensitive material for monitoring an environment-friendly gas characteristic substance CO as well as a preparation method and application thereof, and relates to the technical field of gas-sensitive materials. The preparation method comprises the following steps: dissolving tin tetrachloride pentahydrate, sodium hydroxide and polyvinylpyrrolidone, adding ammonium fluoride, reacting at 155-165 DEG C, drying the product, and calcining at 295-305 DEG C to obtain SnO2 nanoparticles; the preparation method comprises the following steps: performing ultrasonic mixing on SnO2 deionized water dispersion liquid and MoS2 nanosheet ethylene glycol dispersion liquid, and then drying to obtain the MoS2 / SnO2 composite material with a mesoporous hollow nanotube structure, and the volume ratio of ethylene glycol to deionized water is (0.9-1.1): 1. The MoS2 / SnO2 gas sensitive material has the advantages of low density, high pore volume, large specific surface area, high structural stability and the like. And when applied to a CO resistive sensor, the catalyst has good CO selectivity, high sensitivity and good long-term stability.

The invention discloses a PHA-acrylic acid structural unit water-based dispersion based on interface engineering regulation and control, a preparation method thereof and application of a paper-based barrier coating, and belongs to the technical field of high polymer materials, interface engineering and water-based coatings. The stable interface layer is constructed in situ between the crystalline PHA and the acrylic resin through the amphiphilic polymer, so that the problems of poor compatibility and film forming defects of a bio-based material are effectively solved. The dispersion can realize excellent waterproof, oil-proof and gas barrier effects by only needing a relatively low coating weight, and the material consumption is remarkably reduced. The unique gradient structure of the coating has excellent mechanical adhesive force and efficient re-pulping and recycling characteristics, and the technical defect that a traditional barrier coating is difficult to recycle is overcome. And an ideal solution with high performance and high safety is provided for green packaging.

The invention discloses a bio-based PHA oil-resistant and moisture-permeable coating for hamburger paper, coated paper and a preparation method, and belongs to the technical field of bio-based high polymer materials and paper-based food packaging. The coating is a PHA aqueous dispersion, and mainly comprises a semi-crystalline matrix PHA and a low-crystallinity or amorphous toughening PHA. The core of the coating is that after the coating is dried to form a film, a functional gradient structure can be spontaneously formed in the thickness direction of the coating: an interface layer close to a paper base is rich in toughening PHA so as to enhance toughness and adhesive force; and the surface layer of the coating is rich in matrix PHA so as to maximize the oil resistance. By means of the functional gradient structural design, the packaging material integrates oil resistance, moisture permeability and flexibility of the packaging material, has the degradable environment-friendly characteristic and is suitable for packaging high-grease food.

The present invention relates to a composition comprising an aqueous dispersion of biodegradable polymer particles, a method of preparing the composition, and a method of preparing a coated substrate comprising the composition. The composition is useful as a coating applied to a substrate, particularly a paper substrate. The coated paper is useful as a single layered barrier coated paper or paperboard.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

The invention discloses an antiskid sewage-resistant waterborne coating and a preparation method thereof, and relates to the technical field of tableware coatings. The water-based paint comprises a liquid A and a liquid B, the liquid A comprises the following components in parts by weight: 35-60 parts of emulsion type organic silicon aqueous dispersion resin; 3 to 10 parts of maleic anhydride grafted polypropylene wax emulsion; 5-10 parts of an elastomer modified acrylic dispersion; 0.5 to 1.2 parts of a dispersant; 1-3 parts of a thickening agent; 3-8 parts of a nanoscale aluminum oxide dispersion liquid; 15-25 parts of a water-based color paste; 0.3-1 part of an emulsifying ripple auxiliary agent; 0.1-1 part of a substrate wetting agent; 0.1 to 1 part of a defoaming agent; 3-5 parts of deionized water; the liquid B comprises the following components in parts by weight: 90-100 parts of a water-based isocyanate curing agent, 0.3-0.8 part of a dehydrating agent, 5-8 parts of an adhesion promoter and 2-5 parts of a coalescing agent. The invention provides an innovative two-component water-based paint system, through the synergistic effect of the components after the liquid A and the liquid B are mixed, the multiple requirements of tableware or catering auxiliary appliances on the skid resistance, stain resistance, adhesive force and environment friendliness of the coating are comprehensively met, and the coating completely meets the high-standard requirements of food contact materials.

The invention discloses three-dimensional reticular porous MOFs / MXene cellulose composite aerogel as well as a preparation method and application thereof, and belongs to the technical field of aerogel. The preparation method comprises the following steps: adding divalent metal salt into an MXene aqueous dispersion to obtain a mixed dispersion I; sequentially adding the mixed dispersion liquid I and a borax aqueous solution into the mixed dispersion liquid of cellulose nanofibers and polyvinyl alcohol under a heating condition, stirring and dispersing, cooling, and freeze-drying to obtain double-crosslinked network aerogel; the preparation method comprises the following steps: preparing a bi-crosslinked network aerogel, immersing the bi-crosslinked network aerogel into a solution containing imidazole ligands for an in-situ reaction, and then washing and drying to obtain the three-dimensional network porous MOFs / MXene cellulose composite aerogel which has high MOFs loading capacity and excellent stability, can realize efficient adsorption of antibiotics, and is simple in preparation method and suitable for large-scale production.

The present invention relates to a composition comprising an aqueous dispersion of biodegradable polymer particles, a method of preparing the composition, and a method of preparing a coated substrate comprising the composition. The composition is useful as a coating applied to a substrate, particularly a paper substrate. The coated paper is useful as a single layered barrier coated paper or paperboard.

The invention relates to the technical field of porcelain glaze, and discloses a preparation method for combining porcelain glaze of a carbon nano tube enhanced glass-lined reaction kettle, which comprises the following steps: firstly, preparing a carbon nano tube aqueous dispersion, slowly dropwise adding the carbon nano tube aqueous dispersion into a surfactant solution to obtain a positively charged carbon nano tube aqueous dispersion, adding glaze powder into a negative ion solution, and uniformly stirring to obtain the carbon nano tube enhanced glass-lined reaction kettle porcelain glaze. And fully mixing the glaze particles with negative charges to obtain glaze slip, carrying out centrifugal filtration to obtain preliminarily modified glaze particles, carrying out gradient pre-heating in an aerobic environment to obtain pre-calcined glaze particles, placing the pre-calcined glaze particles in calcination equipment, carrying out oxygen-isolated calcination, and in order to discharge pores in the sintered glaze particles, raising the temperature in the furnace again to enhance the fluidity of the glaze particles. The preparation method comprises the following steps: preparing a glaze block, preparing a vacuum environment by using a vacuum pump, recovering to a normal-pressure environment, stopping heating to obtain the glaze block with tightly combined inside, and finally grinding and crushing the glaze block in grinding equipment with the particle size capable of being adjusted according to downstream application requirements.

The invention provides an MXene-derived skeleton composite phase-change material with strong electromagnetic shielding performance, which is a composite phase-change material with a stable shape, which is obtained by taking MXene-derived aerogel as a skeleton material and carrying out vacuum impregnation and adsorption on a molten phase-change material. Wherein the MXene-derived aerogel is an aerogel-based framework material obtained by adding chitosan quaternary ammonium salt, polyethyleneimine and carbon nanotubes into an MXene aqueous dispersion, uniformly dispersing to obtain a mixed solution, directionally and rapidly freezing in liquid nitrogen, carrying out vacuum freeze drying and carrying out high-temperature carbonization. The composite phase change material not only has high thermal conductivity and high latent heat, but also has an EMI (Electro-Magnetic Interference) shielding function and electric heating, photo-thermal and magnetic-thermal conversion capabilities, the highest thermal conductivity is 0.64 W / m.K, the EMI shielding effectiveness is up to 38.28 dB, and the composite phase change material has wide application prospects in electric heating, photo-thermal, magnetic heating, energy storage and electronic equipment thermal management.

This invention discloses a bio-based PHA oil-blocking and moisture-permeable coating for hamburger paper, the coated paper, and its preparation method, belonging to the fields of bio-based polymer materials and paper-based food packaging technology. The coating is an aqueous dispersion of PHA, mainly comprising semi-crystalline matrix PHA and low-crystallinity or amorphous toughening PHA. Its core feature is that after the coating dries and forms a film, it spontaneously forms a functional gradient structure along the coating thickness direction: the interfacial layer near the paper substrate is rich in toughening PHA to enhance toughness and adhesion; while the surface layer is rich in matrix PHA to maximize oil-blocking performance. Through this functional gradient structure design, this invention balances the oil-blocking, moisture-permeable, and flexible properties of the packaging material, and possesses biodegradable environmental characteristics, making it suitable for high-oil food packaging.

To provide hollow particles in which the dielectric dissipation factor is decreased, and the performance stability in high-humidity environment is improved. Hollow particles comprising a shell, which contains a resin, and a hollow portion surrounded by the shell, wherein the hollow particles have a void ratio of 50% or more; wherein the shell contains a polymer as the resin, and a content of a crosslinkable monomer unit is 60% by mass or more in 100% by mass of all monomer units of the polymer; and wherein an aqueous dispersion of the hollow particles, which is obtained by dispersing the hollow particles with a volume of 0.35 cm3 in 100 mL of deionized water, has a pH of 6.5 or more and 7.5 or less and a conductivity of 50 µS / cm or less.

The invention discloses a sustained-release pill as well as a preparation method and application thereof, and belongs to the technical field of medicines. The sustained-release pill comprises a pill core and a coating layer coated outside the pill core, the pellet core is prepared from the following raw materials in parts by mass: 8 to 14 parts of loxoprofen sodium, 30 to 60 parts of a filling agent, 3 to 10 parts of an adhesive, 2 to 10 parts of a disintegrating agent, 0.1 to 2 parts of a penetration enhancer, 0.05 to 0.2 part of a pH regulator, 0.1 to 0.5 part of a surfactant and 0 to 20 parts of an auxiliary agent; the coating layer is prepared from an aqueous dispersion liquid containing acrylic resin; the coating layer is prepared from an aqueous dispersion liquid containing acrylic resin. Aiming at the drug characteristics of loxoprofen sodium, the loxoprofen sodium sustained-release tablet is composed of specific auxiliary materials, the drug composition is optimized, the drug release rate is accurately controlled, the bioavailability and stability of the drug are effectively improved, and the loxoprofen sodium sustained-release tablet has a good application prospect in preparation of antipyretic and analgesic drugs.

To provide hollow particles in which the dielectric dissipation factor is decreased, and the performance stability in high-humidity environment is improved. Hollow particles comprising a shell, which contains a resin, and a hollow portion surrounded by the shell, wherein the hollow particles have a void ratio of 50% or more; wherein the shell contains a polymer as the resin, and a content of a crosslinkable monomer unit is 60% by mass or more in 100% by mass of all monomer units of the polymer; and wherein an aqueous dispersion of the hollow particles, which is obtained by dispersing the hollow particles with a volume of 0.35 cm3 in 100 mL of deionized water, has a pH of 6.5 or more and 7.5 or less and a conductivity of 50 μS / cm or less.

To provide an alumina aqueous dispersion useful in forming a refractory by firing ceramic or the like, without leaving residual carbon even when firing is carried out at a temperature of 600°C or below.SOLUTION: The present invention provides an alumina aqueous dispersion containing alumina particles as dispersed particles, i.e., an alumina aqueous dispersion satisfying the following characteristics: (1) an average particle size of the dispersed alumina particles measured on the basis of number of particles is in a range of 10 to 1000 nm, (2) crystal systems of the alumina particles when the alumina aqueous dispersion is dried at 100°C, are amorphous and / or x-alumina, (3) the pH of the alumina aqueous dispersion is in a range of 2.0 to 5.3, (4) the alumina aqueous dispersion contains an organic acid and an alkali, with the organic acid being formic acid or a combination of formic acid and acetic acid, and the alkali being ammonia and, (5) the concentration of alumina (Al2O3) contained in the alumina aqueous dispersion is 0.5 to 11.5 mass%, and a method of producing the same.SELECTED DRAWING: Figure 1

The invention relates to the technical field of garment materials, and discloses a high-moisture-absorption breathable polyester fabric and a preparation method thereof. The preparation method of the high-moisture-absorption breathable polyester fabric comprises the following steps: mixing terephthalic acid, ethylene glycol, a modified flame-retardant comonomer and tetrabutyl titanate, and carrying out esterification and melt polycondensation to obtain modified polyester; mixing the modified polyester and the polyester master batch, and spinning to obtain the high-performance hollow polyester fiber. Blending and knitting high-performance hollow polyester fibers and cotton fibers to obtain polyester fabric; the preparation method comprises the following steps: modifying palygorskite with a silane coupling agent KH-550, and then loading phosphorus-doped carbon dots to obtain loaded modified palygorskite; the polyester fabric is soaked in the polydopamine finishing liquid and the loaded modified palygorskite aqueous dispersion liquid, and the high-moisture-absorption breathable polyester fabric is obtained. The high-moisture-absorption breathable polyester fabric not only has good moisture absorption and breathability, but also has excellent flame retardance.

The invention relates to the technical field of memristors, and provides a chitosan-based memristor which comprises a substrate, a buffer layer, a composite dielectric layer and a top electrode which are sequentially stacked from bottom to top, the buffer layer is formed by spin-coating a PEDOT: PSS aqueous solution on the substrate and then carrying out heat treatment; the composite dielectric layer is formed by spin-coating the buffer layer with an ultrasonic composite solution formed by a graphene oxide aqueous dispersion and a chitosan acetic acid solution and then carrying out heat treatment. By adopting a collaborative architecture of the chitosan-graphene oxide composite dielectric layer and the PEDOT: PSS buffer layer, the prepared bio-based memristor has the effects of relatively high switching ratio, relatively low operating voltage and good performance stability. Meanwhile, based on stable high and low resistance states of the device, all seven basic logic operations including a NOT gate, an AND gate, an OR gate, a NAND gate, a NOR gate, an XOR gate and an XNOR gate are completely realized on a single bio-based platform, the function accuracy can reach 100%, and an unexpected effect is achieved.

A dispersion, methods of making the same, applications of the dispersion to graphitic material and the resulting coated particles are disclosed. The dispersion includes ≤55% wt. coal tar pitch (softening point 100° C.-95° C.), ≤60% wt. dispersant, and the balance a non-aromatic solvent such as water or alcohol. Pitch particles in the dispersion are preferably ≤10 μm with a distribution of D50<15 μm. The pitch particles are micronized, such as by dry and / or wet milling with the dispersant and aqueous solvent to achieve the desired pitch particle size and distribution. This aqueous dispersion may be mixed with natural or synthetic graphitic material having a diameter of 5-20 μm in a ratio of 5%-30% pitch to graphite, dried and carbonized to form coated particles having a graphitic core at least partially coated by pitch particles.

The invention provides a modified aspartate resin and an aqueous dispersion, and relates to the technical field of aqueous emulsions. The modified aspartic ester resin is obtained by reacting hydrophilic aspartic ester resin with a polyisocyanate compound and then reacting with hydrophobic aspartic ester resin, has moderate hydrophilicity and can be self-emulsified and dispersed in water to form an aqueous dispersion, and a coating cured by the aqueous dispersion is relatively good in water resistance.

The invention discloses a paper-based molded coffee capsule capable of being naturally composted, a PHA aqueous dispersion in-situ film forming barrier heat-sealing composite layer, a preparation method and application thereof, and belongs to the field of degradable packaging and single-cup extraction capsules. The capsule body is formed by molding paper pulp and is provided with a side wall, a bottom wall and a mouth flange; the biodegradable polyester-based film sealing component is connected to the flange in a sealing manner; and the polyhydroxyalkanoate barrier heat-sealing composite layer covers the inner surface of the body and the sealing surface of the flange. The composite layer is obtained by in-situ film forming of a particle size gradient double-layer aqueous dispersion and comprises a permeation anchoring layer located in paper pulp pores and a continuous compact layer located on the outer side in the thickness direction. The flange is a hot-pressing densified area, and a local thickening heat sealing ring is formed on the sealing face of the flange. Through physical anchoring of the small-particle-size components and surface film forming of the large-particle-size components, the moisture and oxygen blocking and interface bonding performance is achieved, and the brewing sealing performance is guaranteed.

To provide a method for producing an aqueous alumina dispersion that forms a highly stable aqueous alumina dispersion utilizing only the protective stability of water-soluble aliphatic amino acids and minimizes the content of alkali metal components and halogen elements.SOLUTION: In the aqueous alumina dispersion, (a) an average particle diameter of dispersed particles is in the range of 5 to 500 nm, (b) alumina particles when the alumina-containing aqueous dispersion is dried at 100°C are composed of one or more of boehmite and pseudo-boehmite, (c) a pH of the aqueous alumina dispersion is in the range of 2.0 to 5.3, (d) the aqueous alumina dispersion comprises a water-soluble aliphatic amino acid, (e) an alumina (Al2O3) equivalent concentration of aluminum contained in the aqueous alumina dispersion is in the range of 0.3 to 11.5 mass%, and (f) a time until the viscosity of the aqueous alumina dispersion becomes 100,000 mPa s or more when a base is added to the aqueous alumina dispersion to adjust the pH to 5.4 to 10 is 24 hours or more.SELECTED DRAWING: Figure 1

A composition, comprising a phosphonated polyamine, wherein the phosphonated polyamine has a molar ratio C:P of ≥ 2.8. An aqueous dispersion, an electrochemical device, use of the composition to disperse a particulate in an aqueous solvent, use of the composition in production of an additive, use of the composition in the composition of electrode are also provided.

A method for preparing a heavy-duty tire with a natural rubber (NR) modified by graphene / carbon blacks varying in particle size synergized with a vulcanization system is provided. Carbon blacks varying in particle size are subjected to surface modification to obtain an graphene oxide / carbon blacks varying in particle size aqueous dispersion. Subsequently, a graphene oxide / carbon blacks varying in particle size modified NR masterbatch is prepared using an aqueous-phase synergistic aggregating precipitating process. Finally, a natural rubber heavy-duty tire is prepared from graphene / carbon blacks varying in particle size synergistically vulcanized modified natural rubber through a molding process. Compounding of graphene with the carbon blacks varying in particle size is utilized to improve dispersion of reinforcing fillers within the rubber matrix. Adjustment of a ratio of a vulcanizing agent to an accelerator is utilized to regulate a cross-linked network structure of the rubber.