150results about How to "High grafting rate" patented technology

The invention discloses a polar monomer graft-modified amorphous poly-alpha-olefin and a preparation method thereof. The polar monomer graft-modified amorphous poly-alpha-olefin is prepared by carrying out grafting reaction on amorphous poly-alpha-olefin, a peroxide initiator, a polar monomer and an auxiliary grafting agent under molten or dissolved conditions. The polar monomer graft-modified amorphous poly-alpha-olefin is prepared from the following raw materials: 100 parts of amorphous poly-alpha-olefin, peroxide initiator accounting for 0.1-1 wt% of the amorphous poly-alpha-olefin, polar monomer accounting for 0.5-10 wt% of the amorphous poly-alpha-olefin, auxiliary grafting agent accounting for 0.1-5 wt% of the amorphous poly-alpha-olefin, solvent accounting for 0-300 wt% of the amorphous poly-alpha-olefin, and antioxidant accounting for 0.05-2 wt% of the amorphous poly-alpha-olefin. The amorphous poly-alpha-olefin has the characteristics of high grafting ratio, light color, high polarity, favorable flowability, favorable storage capability and no risk in moisture crosslinking.

This invention relates to functional nonwoven filter media provided by radiation-induced graft copolymerization and its production method. Meltblown type of nonwoven (Meltblown) comprised of fine fibers, less than 8 micron in diameter, of polyolefin or polyamide is chosen as the suitable grafting trunk polymer. The production methods are composed of following steps, 1) irradiation less than 30 kGy dose to the Meltblown with electron beam or gamma ray; 2) graft copolymerization of emulsified vinyl monomer onto the Meltblown; and 3) chemical conversion of ion exchange group onto the grafted vinyl monomer. These steps are independently conducted in their suitable operation conditions.

The invention provides a method for grafting a propylene polymer with a polar monomer. The method comprises a, mixing a propylene polymer, an initiator and an organic solvent to obtain a mixture, b, removing the organic solvent in the mixture obtained by the step a and adding a polar monomer into the mixture for swelling, c, adding water into the swollen material obtained by the step b and heating the solution for a reaction, and d, washing and drying the reaction product obtained by the step c to obtain a propylene polymer grafted with the polar monomer. The method can utilizes an aqueous phase suspension grafting method for the propylene polymer, can observably improve polar monomer grafting efficiency and ratio and is conducive to wide application of the grafting-modified polypropylene.

The invention discloses a method for preparing super absorbent resin by the graft copolymerization reaction of carboxymethyl potato starch, acrylamide, acrylic acid and sodium salt thereof, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; mixing acrylamide with de-ionized water to obtain an acrylamide solution; mixing the carboxymethyl potato starch with the prepared acrylic acid and the sodium salt solution and the acrylamide solution; adding an evocating agent persulfate and a cross-linking agent N,N'- methylene-bisacrylamide; stirring the mixture under room temperature; heating the mixture by water bath to rise the temperature so as to ensure that the carboxymethyl potato starch, the acrylic acid and the sodium salt thereof and the acrylamide generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature of the reaction; drying and crashing to obtain the super absorbent resin with high potassium content by using carboxymethyl potato starch as the raw material. Compared with the similar products, the water absorption of the super absorbent resin is greatly enhanced; the super absorbent resin contains nitrogen nutrition element, does not need pasting in comparison with theprocess of directly using starch and greatly improves the preparation process. The super absorbent resin has great effect on the water conservation, the desert control, the plant growth promotion andthe like of soil in dry regions.

The present invention relates to a preparation method for organic-inorganic hybrid materials through grafting polymerization-environment responsive macromolecules on the nanometer silicon dioxide surface, belonging to the organic-inorganic hybrid materials synthesis and preparation field. The present invention takes advantage of the action of silicon dioxide with hydroxyl on the surface with the silane coupling agent 3-amino-propyl silane to enable the end to be of an amino group; then the product reacts with the nanometer particle generated from the bromination propionyl bromine reaction; The end of the nanometer particle is the ATRP initiator; finally, the polymerization of the environmentally-responsive macromolecules on the nanometer silicon dioxide surface is initiated in the present of CuBr and PMDETA so as to obtain the target product. The graft rate of the silicon dioxide virgule environmentally-responsive macromolecule core-shell structure nanometer hybrid particles is 60 percent to 70 percent. No reunion of the nanometer hybrid particles appears. The nanometer hybrid particles are uniformly dispersed with environmental responsiveness.

The invention discloses a high temperature resistant modified starch filtration reducing agent and a preparation method thereof. The modified starch filtration reducing agent and the preparation method comprise that: with starch, a phenolic compound, alkenyl amide and alkenyl sulfonic acid as raw materials, an oil phase solution as a continuous phase and a nonionic surfactant as an emulsifying agent, and under catalytic actions of a reduction substrate and a hydrogen acceptor substrate, a starch graft copolymer is generated through a reaction. The filtration reducing agent provided by the invention is resistant to temperature of up to 175 DEG C, and simultaneously also has good salt and calcium resistance capabilities; and the preparation method is simple and easy to implement, and has mild and controllable reaction conditions, high grafting efficiency, fast reaction speed and low cost.

The invention relates to a low temperature impact resistant nylon flexibilizer and a preparation method of the low temperature impact resistant nylon flexibilizer. The low temperature impact resistant nylon flexibilizer comprises the following components in parts by weight: 50-95 parts of ethylene-alpha-octylene copolymer resin, 4-40 parts of polypropylene copolymer, 1-30 parts of linear low density polyethylene, 0.5-10 parts of graft monomer, 0.01-2 parts of initiator, 0.1-1 part of lubricator, 0.1-1 part of antioxidant and 0.1-2 parts of liquid additive. The preparation method of the low temperature impact resistant nylon flexibilizer comprises the steps of: mixing the above components except for the initiator, and adding into a double-screw extruder; laterally feeding and metering the initiator, and adding into the extruder; and extruding and pelletizing to obtain the low temperature impact resistant nylon flexibilizer as a product. The graft ratio of the flexibilizer is increased and the gel content of the flexibilizer is reduced by the lateral feeding technology; after the flexibilizer is applied to nylon (nylon 6, nylon 66), the flexibilizer is good in comprehensive performance and more excellent in low temperature impact performance; and the notch impact strength of the flexibilizer can reach 600J/m at a temperature of -30 DEG C, so that the flexibilizer can be applied to the fields of auto accessories and bumpers, railway equipment and the like under low temperature resistance.

The surface modification process of silicon carbide includes: soaking silicon carbide powder in mixed solution of concentrated sulfuric acid and hydrogen peroxide solution; taking out, flushing with deionized water and stoving; reacting with coupling agent for 1-4 hr; setting silicon carbide inside acetone solution for supersonic cleaning and centrifuging for 2-5 times to obtain processed silicon carbide; adding cross-linking agent to acrylic acid aqua and regulating pH to 5-9 with sodium hydroxide, sodium carbonate or sodium bicarbonate; adding initiator to form the polymerizing precursor solution; mixing processed silicon carbide and the polymerizing precursor solution to obtain surface modified silicon carbide. The product has grafting rate of 0.6-16.2 % and water absorbing rate of 3.0-30 g/g.

The invention relates to a preparation method of maleic anhydride graft polypropylene wax, which is characterized by comprising the following steps: heating and melting polypropylene wax in a kettle by using a heating system and a mixer of a reaction kettle; mixing a maleic anhydride graft monomer with the addition of 1.5 to 8.0 of polypropylene in percentage by weight by controlling the mixing rate from 120 r/min to 250 r/min at reaction temperature from 100 DEG C to 250 DEG C; adding an initiating agent with the addition of 1/30 to 1/10 of the adding quantity of maleic anhydride and a graft active agent with the addition of 1:3 to 2:1 of the weight of the maleic anhydride at reaction time from 0.5 hour to 10 hours, thereby completing the graft reaction of the maleic anhydride; and then cooling, pelleting or crushing maleic anhydride graft polypropylene wax so as to complete the preparing process of the maleic anhydride graft polypropylene wax. The invention also discloses a relative device. The preparation method of maleic anhydride graft polypropylene wax has the advantages of simple and reasonable technology, easy manufacture, low production cost, simplified product formula, and the like.

The invention discloses a wood plastic composite for injection and a preparation method and application thereof. The composite comprises the following components in part by weight: 30 to 70 parts of thermoplastic plastic for injection, 30 to 70 parts of biomass fiber, 5 to 10 parts of solid phase graft copolymer of polyolefin and monomers, and 0.5 to 4 parts of processing agent. The preparation method comprises the following steps of: premixing the components in a high-speed mixer; adding the mixture into a double-screw extruder to extrude; and cooling and granulating the mixture to obtain the wood plastic composite for injection. The wood plastic composite for injection can be directly used or mixed with plastics on a general injection machine for forming to prepare products in complicated shapes. The wood plastic composite for injection is high in production speed and efficiency, is easy to realize automation production, and can also obviously improve compatibility and interface bonding between the hydrophobic plastics and the hydrophilic biomass fiber; and performances such as modulus, strength, size stability, water resistance, processability and the like of the composite are obviously improved.

The invention provides a method for constructing a super-hydrophilic layer of a polyvinylidene fluoride hollow fiber ultrafiltration membrane and belongs to the technical field of materials. The method comprises the following steps of: generating C-C unsaturated bonds, hydroxyls and carboxyls on the surface of the polyvinylidene fluoride (PVDF) ultrafiltration membrane through pretreatment by using the mixed solution of a strong base and potassium permanganate, respectively grafting hydrophilic acrylic acid and alcohol monomers to the surface of the PVDF ultrafiltration membrane by free radical grafting reaction and esterification reaction under the actions of an inorganic acidic catalyst and an organic peroxide initiator, wherein a stable super-hydrophilic layer is constructued on the surface of the membrane under the synergic action of the two monomers to obstruct the adsorption and deposition of organic matters on the surface of the membrane efficiently. Consequently, the PVDF hollow fiber ultrafiltration membrane is provided with high resistance to organic matter pollution and super hydrophilicity; after super hydrophilic modification treatment, the water flux of the PVDF hollow fiber ultrafiltration membrane is 100-200% higher than before.

The present invention discloses a preparation process for a core-shell nanoparticle emulsion for impact modification of aqueous epoxy resin. The preparation method comprises the following steps of: step A, using a sol-gel method to prepare uniformly dispersed nanosilica, and using a silane coupling agent to conduct surface hydrophobic modification on the nanosilica to obtain hydrophobic nanosilica; and step B, using a micro-suspended seed emulsion polymerization method and the hydrophobic nanosilica obtained in step A as a core structure, and using methacrylate and a glycidyl methacrylate monomer to conduct polymer coating to obtain the product. Core-shell structure nanoparticles prepared by the preparation process, using silica as the core with the surface coated with polymers, have the advantages of high coating rate, uniform size and same shell thickness.

The invention discloses a method for preparing polyamidoxime/graphene nanobelt composite aerogel and separating and enriching uranium, which is characterized by comprising the following steps of: firstly, axially cutting a multiwalled carbon nanotube by using a potassium permanganate oxidation method to prepare a graphene oxide nanobelt; then adding into a mixed solution of acrylonitrile and ammonium persulfate which are fully mixed, and primarily preparing polyacrylonitrile/graphene nanobelt composite hydrogel by adopting a solvothermal polymerization method; and then converting cyano groupsinto amidoxime groups by virtue of a reaction between the cyano groups and hydroxylamine under an alkaline condition so as to obtain polyamidoxime/graphene nanoribbon composite hydrogel, and finally,carrying out low-temperature freeze drying so as to obtain the polyamidoxime/graphene nanoribbon composite aerogel. The prepared polyamidoxime/graphene nanobelt composite aerogel is high in grafting rate, uniform in density distribution, stable in structural performance and rich in special functional groups of uranium, the uranium can be effectively and selectively removed from different uranium-containing water bodies, the adsorbed aerogel can be rapidly separated and recycled from a solid-liquid system, and no pollution is caused to the environment.

The invention provides a dissolvent thermal synthesis Method for preparation of maleic anhydride grafting ethene-octene copolymer, adding ethane-octene resin, maleic anhydride, initiator and monomer and dissolving them in solvent, controlling reaction temperature above the solvent's boiling point, carrying through reaction in the supercritical state of systerm, making ethene-octene contacts with reactant sufficiently, then washing and desiccation, getting the grafted copolymer of ethene-octene maleic anhydride. The getted maleic anhydride grafting ethene-octene copolymer is used as compatible reagent of ethene-octene and polycarbonate, polyester, nylon, polyurethane, polyvinyl chloride blending, viz. getting composite material of better combination property. This invention's method is simple, the grafting rate is high, the mass production is easy and the application foreground is wide.

A preparation method of an intelligent antibacterial polypeptide coating layer is a method universally applicable to different substrate materials. The preparation method includes the following steps: firstly, placing the substrate materials in a low temperature plasma generator main body chamber, vacuumizing, then introducing argon, loading with voltage and current, and carrying out plasma treatment; secondly, rapidly placing the substrate materials after treatment in a methanol solution with a certain amount of dimercaptan; and then, carrying out a reaction of the obtained substrate materials having the surface containing sulfydryl and an antibacterial polypeptide containing sulfydryl under an action of an antioxidant, and forming disulfide bonds. When the antibacterial polypeptide coating layer makes contact with bacterial cells, the disulfide bonds on the surface of the substrate materials are broken and are reduced to release the antibacterial polypeptide containing sulfydryl, so as to play a role of sterilization. The antibacterial activity of the antibacterial polypeptide in a free state is higher than that of a same antibacterial polypeptide covalently immobilized on a material surface, and the usage amount of the antibacterial polypeptide can be greatly reduced.

The invention discloses a preparation method of a glycidyl methacrylate melt-grafted polyolefin material. The preparation method comprises the following steps: directly adding glycidyl methacrylate and graphene oxide onto polyolefin pellets or powder, uniformly mixing at normal temperature, and adding the physical mixture into reaction equipment; and uniformly mixing an initiator and a styrene liquid, adding the mixture into the above reaction equipment, and melt-blending at a certain temperature. The prepared glycidyl methacrylate grafted polyolefin has high grafting rate and high molecular weight or high grafting rate and low crosslinking degree.

The invention discloses a preparation method for polypropylene grafted maleic anhydride with a high graft ratio and low odor. The method comprises the following steps: adding double-bond-containing petroleum resin with a concentration of 1% to 50% into a system, then adding an auxiliary monomer styrene and modifying a composite material of polypropylene and the petroleum resin with maleic anhydride under the action of an initiator with temperature controlled to be 170 to 230 DEG C; and removing unreacted impurities in the system through vacuumization. A compatibilizing agent with a high graft ratio and low odor can be prepared by utilizing the method in the invention. The prepared polypropylene grafted maleic anhydride compatibilizing agent can improve bonding strength between polypropylene and inorganic fillers like calcium carbonate, glass fiber and mica, thereby enhancing tensile strength, thermal deformation temperature and the like of polypropylene.

The invention discloses a polymer by grafting cyclodextrins onto polylysine and a preparation method of the polymer. The preparation method comprises the steps as follows: under the condition that a condensation agent and a condensation assistant agent exist, the cyclodextrins modified by amino are stirred with N-succinyl polylysine for several hours; after insoluble matters are removed by filtration, small molecules in a reaction system are removed by using a dialysis bag; reaction liquid is concentrated and dried through a rotary evaporator, so that the polymer by grafting the cyclodextrins onto the polylysine is obtained. The preparation method provided by the invention has the advantages that the reaction condition is more moderate, and the yield, grafting ratio and purity of the product polymer by grafting the cyclodextrins onto the polylysine are high.

The invention relates to a grafted copolymer preparing method based on chitosan and polylactic acid. The chitosan and polylactic-acid grafted copolymer is prepared with a 1-ethyl-(3-dimethyllaminopropyl)carbodiie hydrochlide (EDC) and N-hydroxysuccinimide (NHS) condensation system as coupling agents. According to the grafted copolymer preparing method, the preparing conditions include the normal temperature and the normal pressure, the preparing process is safe, convenient and rapid, and residual organic solvents are few; the particle diameter of prepared chitosan and polylactic-acid particles ranges from 4 micrometers to 10 micrometers, the surface appearance is regular, the good dispersity and the good stability are achieved, and the prepared particles can be used as carrier materials for targeted drug delivering.

The invention provides a polyaspartic acid derivative synthetic method. The method comprises the following steps: monosaccharide or disaccharide and monochloro acetic acid are reacted under catalysisof NaOH, and a reactant is subjected to further acidifying and purification to obtain carboxymethyl saccharide; carboxymethyl saccharide and diamine are subjected to dehydration condensation under catalysis of phosphoric acid to obtain glycosyl acetyl diamine; L-aspartic acid and phosphoric acid are respectively added in a kneading reactor for mixing, a mixture is stirred and heated, polymerization is carried out for preset time to obtain polysuccinimide; glycosyl acetyl diamine is added in a reaction vessel of polysuccinimide for a reaction, polysuccinimide is subjected to ring-opening and grafting reaction to obtain a polysuccinimide derivative; the polysuccinimide derivative is added in a hydrolysis kettle, an aqueous solution of alkali is add drop by drop, a hydrolysis reaction is carried out, and a liquid-phase product after hydrolysis is a glycosyl acetyl diamine-grafted modified polyaspartate aqueous solution. The synthetic method is simple and easy to operate, a grafting modification step and a polymerization step are coupled, so that the side-chain grafting rate is increased and the polymericular weight can be regulated and controlled.

The present invention provides a thermal synthesis process for preparing grafted polyvinyl-maleic anhydride copolymer in solvent. It features that inside one high pressure reactor, polyethylene resin, maleic anhydride, dispersant, initiator and conjugated monomer are dissolved in solvent and reacted at certain temperature for certain period, and the product is then washed and dried to obtain grafted polyvinyl-maleic anhydride copolyer. The copolymer may be used as adhesive for composite polyethylene and metal pipe or plate; compatibilizer for polymer alloy to raise its compatibility and compatizier for polyethylene and inorganic communication material to raise the tensile strength without change in compact toughness. The process is simple, high in grafting rate and suitable for large-scale production.

The invention provides a solvent synthesis method of maleic anhydride graft styrene-butadiene -styrene, placing styrene-butadiene-styrene resin (SBS), maleic anhydride, initiator and comonomer in high pressure kettle to dissolve in solvent, reacting at a certain temperature and in a certain time, and then washing and drying to obtain SBS-maleic anhydride graft copolymer. It is simple, has high grafting rate and convenient for large-scale production. The prepared SBS-g-MAH is used in the compatilizer of the mixture of SBS with polycarbonate, polyester, nylon, polyurethane, polyvinyl chloride and so on.

The invention discloses a lignin-silicon dioxide nanocomposite particle as well as a preparation method and application of the lignin-silicon dioxide nanocomposite particle. The method comprises the steps of firstly, introducing an azido structure on the surface of a nano silicon dioxide particle by virtue of alkylation reaction, and preparing alkynyl lignin from lignin; then, reacting alkynyl lignin and triazo nano silicon dioxide under the catalytic action of Cu (I) to prepare the lignin-silicon dioxide nanocomposite particle containing a triazole structural unit. The lignin-silicon dioxide nanocomposite particle prepared according to the characteristics of click reaction temperature, high speed and good specificity has favorable dispersibility and thermal stability and good selective heavy metal ion adsorption performance, has the Cu<2+> adsorption capacity of 120-135mg/g, and can be applied to the field of ion adsorption materials and the like.

The invention discloses a preparation method of an acrylate-styrene-acrylonitrile nuclear shell grafted copolymer. The method comprises the following steps of 1 preparing seed latex, 2 preparing acrylate rubber nuclear, 3 preparing a rubber nuclear with the outer surface containing an initiator monomer, and 4 preparing a grafted SAN shell layer. The method can effectively improve the SAN shell layer grafting rate, the problems that wrapping of the acrylate rubber nuclear is not right or uniform are avoided, meanwhile, the powder characteristic of the grafted copolymer is improved, and the dyeing property is remarkably improved. Meanwhile, under the condition that no agglomeration technology is performed, the grain size of the acrylate rubber nuclear can reach 180-600 nanometers, and the impact performance is improved.

The invention relates to the field of polyester materials, and discloses isosorbide modified high-heat-resistance biodegradable polyester and a preparation method thereof. According to the invention,terephthalic acid or dialkyl ester thereof is used as a rigid component, linear aliphatic dicarboxylic acid and/or dialkyl ester thereof and/or dibasic acid anhydride thereof is used as a degradationmodification component, biomass-derived isosorbide is added as a heat-resistant modification component, and the isosorbide-modified high-heat-resistance biodegradable polyester is obtained by a directesterification method. The polyester disclosed by the invention has biodegradability and high heat resistance; and compared with common degradable polyester, the glass transition temperature (Tg) ofthe polyester disclosed by the invention is increased by at least more than 15 DEG C in comparison with the glass transition temperature before modification.

The invention provides a method for preparing an unsaturated carboxylic acid grafted polypropylene copolymer, which includes the steps: dissolving 45-300 parts by weight of unsaturated carboxylic acid grafting monomers into 280 parts by weight of N, N-dimethyl formamide, dissolving 100 parts by weight of dibenzoyl peroxide into 770 parts by weight of dimethylbenzene, mixing the solutions with 300parts by weight of polypropylene granules and 45-700 parts by weight of styrene, mixing the mixture for one hour at the room temperature in the N2 (nitrogen) atmosphere, and carrying out a reaction for 0.5-2 hours at the temperature of 100-130 DEG C to obtain a product. The method is simple in process, free of environmental pollution and easy in aftertreatment, and grafted polypropylene containing amino acid residues has excellent biocompatibility.

The invention discloses a method for nano modification of polyacrylamide flocculant, and belongs to the field of environment-friendly water treatment materials. The method includes the steps that chitosan is completely dissolved in an acetic acid solution in a magnetic stirring state, a sodium tripolyphosphate solution is added drop by drop, stirring is continued, and the mixed solution is put in an ultrasonic device to prepare a nano chitosan solution ultrasonically; acrylamide monomers and photoinitiator are added into the obtained solution and dissolved through stirring, nitrogen is introduced to remove oxygen and seal a reaction bottle, and the reaction bottle is placed under a low-voltage ultraviolet lamp to generate milk white colloid through illumination polymerization; the colloid is soaked in a mixed solution of absolute ethyl alcohol and acetone, flushed with distilled water, put into a vacuum drying oven to be dried, ground and screened to obtain the final nano chitosan/polyacrylamide flocculant in a white powder form. Reaction conditions are moderate, polymerization time is short, condensation cooling is not needed, energy consumption and cost are reduced, industrialization is easy, and the obtained modified polyacrylamide flocculant has adsorption and bridging capacity.

The present invention relates to hydrophilic and oleophilic polytetrafluoroethylene micro-powder and a preparation method thereof. According to the hydrophilic and oleophilic polytetrafluoroethylene micro-powder, in a solvent, in the presence of 5-10 parts of a surfactant, 1-3 parts of concentrated H2SO4, and 1-3 parts of a polymerization inhibitor, 15-30 parts of polytetrafluoroethylene micro-powder crushed through electron beam irradiation, 25-50 parts of a water-soluble monomer and 40-80 parts of an oil-soluble monomer are grafted to prepare the hydrophilic and oleophilic polytetrafluoroethylene micro-powder. According to the present invention, the water-soluble monomer and the oil-soluble monomer are grafted on the polytetrafluoroethylene micro-powder, such that the polytetrafluoroethylene micro-powder maintains the original excellent performance, further has functions of hydrophilicity and lipophilicity, has good dispersity, and can be uniformly blended with other materials.

The invention discloses a preparation method of a carbon nanotube modified by alkynyl on the surface. The preparation method comprises the following steps: carrying out surface modification on the carbon nanotube by virtue of a Pschorr-type arylation method to obtain the carbon nanotube which is halogen modified on the surface; then, converting the surface halogen of the carbon nanotube into alkynyl by virtue of Sonogashira coupling reaction; and carrying out alkynyl modification on the surface of the carbon nanotube by virtue of a joint application of Pschorr-type arylation and Sonogashira coupling reaction. The preparation method provides a simple path for introducing the carbon nanotube into preparation of a biosensor electrode or a biological nano material further by virtue of click chemistry. The method disclosed by the invention is simple, few in byproduct and can be prepared on a large scale, and the raw materials are easily available.

The invention provides a method for preparing primary structure-grafted and modified white carbon black. Under conditions of high temperature, high pressure and high shear, a white carbon black aggregation is dissociated, and a primary structure is formed, through a grafting reaction of the primary structure white carbon black and a modifier, finally, a primary-structure white carbon black modifier grafting substance is formed. According to the invention, problem of self agglomeration of the white carbon black can be effectively solved, and uniform modification of the white carbon black is realized.