102 results about "Rubber technology" patented technology

The invention relates to the technical field of thermoplastic vulcanizates, and discloses a TPV sealing material and a preparation method thereof. The TPV sealing material is prepared from the following raw materials in parts by weight: 10 to 30 parts of PP resin, 40 to 60 parts of EPDM rubber, 10 to 20 parts of polylactic acid, 15 to 25 parts of filler, 0.5 to 1.5 parts of vulcanizing agent, 0.3 to 1.5 parts of vulcanization accelerator, 5 to 10 parts of compatilizer, 1 to 4 parts of modified heat stabilizer and 0.5 to 3 parts of modified anti-aging agent. Through preparation of the modified heat stabilizer, structural damage or sealing failure caused by thermal aging of a system can be reduced, and the service life of the sealing material is greatly prolonged; the preparation of the modified anti-aging agent can effectively resist the corrosion of environmental factors such as thermal oxidation and ozone to the system, and prevent the problems of cracking, hardening, elasticity attenuation, sealing failure and the like of the sealing material after long-term use.

The invention relates to the technical field of rubber, and relates to a wear-resistant rubber composite material and a preparation method thereof. The wear-resistant rubber composite material is prepared from the following components in parts by weight: 100 parts of a rubber matrix, 30 to 60 parts of multi-stage core-shell structure composite filler, 10 to 15 parts of carbon black, 1.0 to 2.5 parts of a vulcanizing agent, 0.5 to 2.0 parts of an accelerant, 3 to 6 parts of an active agent and 1 to 3 parts of an anti-aging agent, the multi-stage core-shell structure composite filler sequentially comprises a rigid inorganic nano-particle core, a rigid inorganic nano-particle core and a rigid inorganic nano-particle core from inside to outside, the core is coated with the first shell layer, the first shell layer is a mesoporous silica layer, and a silane coupling agent containing sulfur groups is modified in the mesoporous silica layer; and the second shell layer is coated outside the first shell layer and is a hyperbranched polymer layer. According to the wear-resistant rubber composite material provided by the invention, the comprehensive mechanical property and wear resistance of the rubber composite material are improved.

The invention relates to the technical field of rubber, and provides a high-strength rubber transmission belt as well as a preparation method and application thereof. The high-strength rubber transmission belt is prepared from the following raw materials in parts by weight: 90 to 110 parts of ethylene propylene diene monomer, 6 to 10 parts of aramid fiber, 3 to 9 parts of nylon, 40 to 50 parts of filler, 4 to 6 parts of vulcanizing activator, 5 to 9 parts of paraffin oil, 4 to 7 parts of adhesive, 3 to 4 parts of anti-aging agent, 11 to 15 parts of auxiliary vulcanizing agent, 2 to 4 parts of vulcanizing agent and 0.1 to 0.5 part of scorch retarder. The filler is prepared from the following raw materials in parts by weight: 100 parts of carbon black, 5 to 7 parts of 4-maleimidobenzoic acid and 5 to 7 parts of 2, 2-dimethylolpropionic acid. Through the technical scheme, the problem of insufficient strength of the rubber transmission belt in the related technology is solved.

The invention relates to the technical field of rubber, in particular to an off-road tire base rubber composition. Based on 100 parts by weight of natural rubber components, the natural rubber composition further comprises the following components in parts by weight: 20-40 parts of carbon black, 5-15 parts of silicon dioxide hydrate, 5-20 parts of nano zinc oxide, 1-3 parts of stearic acid, 1-3 parts of p-phenylenediamine, 1-3 parts of a ketoamine anti-aging agent, 1-3 parts of bis (triethoxysilyl) propyl tetrasulfide, 1-5 parts of carbon nanotubes CNT, 1-4 parts of N, N '-m-phenylene bismaleimide, 0.5-2 parts of sulfur and 0.5-2 parts of a sulfenamide accelerant. The modulus of the rubber material is improved by adding the CNT, so that the consumption of carbon black is reduced, and heat generation is reduced; by adding nano zinc oxide and carbon nanotubes, the heat conductivity of the rubber material is improved; and by adding the N, N '-m-phenylene bismaleimide, the heat resistance of the rubber material is improved.

The application discloses modified white carbon black wet rubber glue based on white carbon black as well as a preparation method and application thereof, and belongs to the technical field of rubber.The solution blending method is used in the embodiment of the application, and the prepared modified white carbon black can be easily uniformly dispersed in a rubber matrix.Compared with the prior art, the application can further improve the dispersion of high filling amount white carbon black in the rubber material, and can adjust the types and contents of two silane coupling components to control the mechanical properties and fatigue resistance of the wet rubber glue.The white carbon black wet rubber glue can be applied in tire preparation and has excellent comprehensive performance.

The present application relates to the technical field of rubber, in particular to a kind of giant engineering machinery tire anti-split body rubber composition and preparation method thereof. With 100 parts by weight of natural rubber component as benchmark, further comprising the following components: natural rubber 100 parts, carbon black 40-50 parts, zinc oxide 6-8 parts, cobalt salt 0.2-0.4 parts, antioxidant 2246 0.5-1 part, antioxidant S-TMQ 0.2-1.0 parts, N,N'-4,4'-diphenyl methane bismaleimide 0.5-1.5 parts, insoluble sulfur 8-12 parts, accelerator 0.3-0.7 parts, anti-scorching agent 0.05-0.15 parts. The present application solves the shortcomings of lower adhesive property of body rubber and insufficient anti-splitting ability of existing technology under harsh road conditions and hot and humid, steam, salt water environment, greatly reduces the occurrence probability of body delamination and bead bulging under hot and humid environment in Southeast Asia, improves the anti-splitting ability of body rubber, and ensures the service life of giant tire under high load operation.

The application belongs to the technical field of rubber, and particularly relates to an environment-friendly weather-resistant high-wear-resistance handrail belt rubber material and a preparation method thereof. The rubber material comprises, in terms of weight parts, 80-95 parts of styrene-butadiene rubber, 5-20 parts of butadiene rubber, 70-90 parts of carbon black, 6-9 parts of active agent, 3-5 parts of environment-friendly paraffin oil or naphthenic oil, 4-7 parts of anti-aging agent composition, 1-2 parts of accelerator and 1.5-2.5 parts of vulcanizing agent. The anti-aging agent composition is a combined system of p-phenylenediamine anti-aging agent and quinoline anti-aging agent. Through the synergistic effect of the rubber combined system, the gradation optimization of the reinforcing system and the synergistic effect of the anti-aging agent composition, the application simultaneously realizes high wear resistance, excellent weather resistance (ozone and thermal oxygen aging resistance), low-temperature toughness at-45 DEG C and environment-friendly performance of PAHs <= 10 ppm, and the comprehensive performance is significantly better than that of the existing handrail belt material, and the eight-year service life requirement of public places can be met.

The application provides a sound insulation rubber composite material and a preparation method and application thereof, and belongs to the technical field of rubber, and the preparation method comprises the following steps: butyl rubber and ethylene-propylene-diene rubber are added into a banbury mixer for plasticizing, then carbon black, a metal oxide compound, a modifying additive, a vulcanization activator and an antioxidant are added for mixing, vulcanization accelerators and vulcanization agents are further added for mixing, and then glue is discharged to obtain a rubber compound; the rubber compound is placed in an open mill for thin mixing and storage to obtain a mixed rubber; the mixed rubber is vulcanized on a flat vulcanizing machine to obtain the sound insulation rubber composite material; wherein the metal oxide compound is prepared by calcining and crushing cerium dioxide, titanium dioxide and silicon dioxide; and the modifying additive is prepared by using a functional polymer and modified hollow glass microbeads; the sound insulation rubber composite material has good sound insulation performance and durability, and the preparation process is simple.

This invention discloses an organocobalt salt for improving the tensile strength of rubber and its preparation method, belonging to the field of rubber technology. The organocobalt salt for improving the tensile strength of rubber comprises, by mass parts, 140-210 parts of organosilicon vegetable fatty acid, 20-30 parts of solvent, 20-30 parts of cobalt hydroxide, and 10-16 parts of propionic acid. The organosilicon vegetable fatty acid is obtained by reacting rosin with organosilicon maleimide. The organosilicon maleimide is obtained by reacting maleic anhydride with a silicon-containing long-chain fatty amine. The silicon-containing long-chain fatty amine is obtained by reacting methyldiethoxysilane with an unsaturated long-chain fatty amine. The organocobalt salt obtained by this invention has a good effect on promoting the adhesion between metal and rubber while effectively improving the tensile strength of rubber.

The invention relates to the technical field of sealing rubber, and discloses a high-pressure gas-resistant tear-resistant water heater sealing rubber material and a production process thereof, the high-pressure gas-resistant tear-resistant water heater sealing rubber material comprises the following raw materials by weight: 90-110 parts of a rubber matrix, 60-80 parts of nitrile rubber, and 20-40 parts of hydrogenated nitrile rubber; the acrylonitrile content of the nitrile rubber is 32%-36%; the composite material comprises the following components in parts by weight: 30-45 parts of a reinforcing filler system, 20-30 parts of carbon black N550 and 8-15 parts of nano white carbon black, and the nano white carbon black is precipitated white carbon black. 1.5 to 3 parts of a coupling agent, wherein the coupling agent is at least one of bis-(gamma-triethoxysilylpropyl) tetrasulfide and bis-(gamma-triethoxysilylpropyl) disulfide; the nitrile rubber and the hydrogenated nitrile rubber are cooperatively used, the carbon black N550 and the nano white carbon black in a specific proportion are matched to form a reinforcing system, and meanwhile, the silane coupling agent is used for enhancing interface bonding, so that the material has excellent mechanical properties and high pressure resistance.

The invention relates to the technical field of liquid silicone rubber, in particular to luminous addition type liquid silicone rubber and a preparation method thereof, and the luminous addition type liquid silicone rubber is prepared from vinyl silicone oil, hydrogen-containing silicone oil, a Karst catalyst, an alcohol inhibitor, a cross-linking agent, filler, a white carbon black surface treating agent, a long afterglow luminescent material and the like. The silicone rubber comprises a component A and a component B in parts by mass, the component A comprises 100 parts of base rubber and 0.01-5 parts of a platinum catalyst, and the component B comprises 100 parts of base rubber, 0.5-5 parts of a cross-linking agent, 0.01-3 parts of an inhibitor and 5-50 parts of a long-afterglow luminescent material treated by a silane coupling agent. The base rubber comprises 15-40 parts of white carbon black, 30-70 parts of vinyl silicone oil, 2-15 parts of a white carbon black surface treating agent, 10-35 parts of silicon resin and 1-5 parts of water. According to the invention, a specific luminescent material is added, so that the material has a lasting luminescence function after being cured. And the light-emitting addition type liquid silicone rubber can be applied to the fields of light-reflecting vests, safety clothes, safety signs and the like.

The present invention relates to the technical field of thermally conductive silicone rubber, and in particular to thermally conductive silicone rubber and a preparation method therefor. The present invention provides thermally conductive silicone rubber and a preparation method therefor. The thermally conductive silicone rubber comprises: vinyl-terminated polydimethylsiloxane, vinyl MQ resin, hydrogen-containing silicone oil, ethynylcyclohexanol, and modified silver powder. The modified silver powder is a mixture containing a silicone resin and silver powder. The use of the silver powder coated with the silicone resin in the thermally conductive silicone rubber provided by the present invention enables the thermally conductive silicone rubber to exhibit suitable flowability before curing and a high thermal conductivity coefficient, and to meet use requirements for silicone rubber having ultra-high thermal conductivity on the market. The thermally conductive silicone rubber provided by the present invention can be applied to structural heat dissipation components such as ultra-high power light-emitting chips.

The invention relates to the technical field of liquid silicone rubber, and particularly discloses a wear-resistant liquid silicone rubber composite material and a preparation method thereof. The composite material comprises a component A and a component B, wherein the component A comprises vinyl-terminated silicone oil, nano aluminum oxide double-modified by a polyhydroxy polymer and a vinyl silane coupling agent, and a platinum catalyst; the component B comprises vinyl-terminated silicone oil, hydrogen-containing silicone oil, an inhibitor and active polysilazane, the active polysilazane is modified polysilazane containing vinyl or epoxy group, and the active group of the active polysilazane can chemically react with the active group on the surface of the modified nano aluminum oxide to form a chemically bonded interface transition layer. According to the invention, through a dual modification strategy and introduction of active polysilazane, a chemically bonded rigid-flexible bicontinuous network structure is constructed, so that the wear resistance of the composite material is improved while excellent tensile strength, tear strength and elongation at break are maintained.

The invention relates to the technical field of rubber, in particular to modified polyisoprene rubber and a preparation method and application thereof.The preparation method at least comprises the following steps that polyisoprene rubber is placed on a roller of an open mill, the roller speed of the open mill is controlled to be 20-60 rpm, the roller distance is 0-3 mm, the roller temperature is controlled to be 40-70 DEG C, mixing is conducted, and the modified polyisoprene rubber is obtained; the molecular weight is reduced by chain scission through a mechanical means, the viscosity of the polyisoprene rubber is reduced, the modified polyisoprene rubber is obtained, the processing performance is improved, and the polyisoprene rubber can be used for preparing cyclized rubber resin for photoresist, so that the polyisoprene rubber has huge development potential in the field of adhesives.

The application relates to the technical field of rubber, and discloses a high-strength rubber transmission belt and a preparation method and application thereof. The high-strength rubber transmission belt comprises the following components by weight: 90-110 parts of ethylene-propylene-diene rubber, 6-10 parts of aramid fiber, 3-9 parts of nylon, 40-50 parts of filler, 4-6 parts of vulcanization activator, 5-9 parts of paraffin oil, 4-7 parts of adhesive, 3-4 parts of anti-aging agent, 11-15 parts of vulcanization aid, 2-4 parts of vulcanizing agent and 0.1-0.5 parts of anti-scorching agent. The filler comprises the following components by weight: 100 parts of carbon black, 5-7 parts of 4-maleimide benzoic acid and 5-7 parts of 2,2-dimethylol propionic acid. The technical scheme can solve the problem of insufficient strength of the rubber transmission belt in the related art.

This invention discloses a modified rubber powder with oil resistance and anti-aging properties, and its preparation method, belonging to the field of rubber technology. Vulcanized rubber powder is pretreated with anhydrous ethanol to obtain pretreated rubber powder; the pretreated rubber powder, a composite modifier dispersion, and a photoinitiator are mixed to obtain a compound; the compound is treated with ultraviolet light to obtain a crosslinked compound; the crosslinked compound is then washed, dried, and sieved through a 40-mesh sieve to obtain the modified rubber powder. This invention uses alkali lignin and nano-titanium dioxide as raw materials, and through coordination self-assembly and click chemistry modification, obtains a modified rubber powder with good oil resistance, anti-aging properties, and good interfacial compatibility. The composite modifier forms a three-dimensional network protective layer on the surface of the rubber powder, which can effectively block oil penetration and significantly improve resistance to ultraviolet and thermo-oxidative aging.

The application relates to the technical field of liquid silicone rubber, and particularly discloses in-situ forming single-component addition type liquid silicone rubber and a preparation method thereof. Base glue is prepared by kneading vinyl silicone oil, nano silicon dioxide and silicone resin, and then, additives such as a crosslinking agent, an adhesion promoter, a thixotropic agent, an inhibitor and a platinum gold catalyst are added in a proper proportion, and defoaming is carried out to obtain the silicone rubber, the preparation process is simple, the prepared silicone rubber product has single-component packaging, is convenient and simple to use, can be quickly cured at high temperature, no small molecules are released during the curing process, is efficient and environment-friendly. The silicone rubber cured at high temperature not only has excellent mechanical properties (tensile strength > 5 MP, elongation at break > 150%, compression set < 30% after long-term compression at high temperature), but also has good adhesion to an adhesive surface after high-temperature aging, has no adhesion to a sealing surface, and has good detachability.

The invention relates to a preparation method of an electro-conductive silicone rubber material applied to robot touch hands, and belongs to the technical field of silicone rubber. The modifier is self-made, the modifier, siloxane and the conductive filler are blended to obtain the silicone rubber material applied to robot touch hand guidance, the modifier is a conductive polymer with a main chain being a polythiophene structure, and the conductive filler can be combined to improve the conductivity of the material; meanwhile, due to good flexibility and high oxidation stability, the material has excellent flexibility and electrochemical corrosion resistance, in addition, disulfide bonds in the modifier can achieve self-repairing of damaged parts through reversible fracture and recombination, and the performance is improved, so that the material has a good application prospect. The robot touch finger can bear repeated mechanical stress changes caused by operations such as touching and grabbing while achieving finer grabbing and interaction.

The present application relates to the technical field of conductive silicone rubber, and particularly relates to a conductive graphene-ethyne carbon black-silicone rubber composite material and a preparation method thereof, the conductive graphene-ethyne carbon black-silicone rubber composite material comprises the following raw materials in parts by weight: 100 parts of silicone rubber, 40-50 parts of modified ethyne carbon black, 3-5 parts of phosphorus-doped conductive graphene, 2-4 parts of hydroxyl silicone oil, 2-5 parts of vulcanizing agent, 1-3 parts of triallyl isocyanurate, 2-4 parts of zinc oxide and 0.3-0.7 parts of stearic acid. The conductive graphene-ethyne carbon black-silicone rubber composite material prepared by the present application has excellent conductivity and good mechanical properties.

The application provides an elastic gasket and a preparation method and a composite silica gel force bearing pad and a preparation method, and relates to the technical field of silicone rubber. The preparation method provided by the application comprises the following steps: arranging a mold core with a fiber braided tube on the surface in a radial direction to obtain a fiber composite array; and compounding the fiber composite array with a silicone rubber material, and performing mold pressing vulcanization, and then removing the mold core to obtain an elastic gasket. When the elastic gasket prepared by the application bears a compression load, the fiber braided tube resists the radial deformation of the elastic gasket, so that the compression strength and the rigidity of the gasket are effectively improved, and the high modulus of the fiber braided tube can promote the rapid rebound of the gasket, and can optimize the energy absorption and release of the elastic gasket in the compression process.

The invention discloses an anti-aging radial tire and a preparation method thereof, and belongs to the technical field of tire rubber. The tread, the sidewall and the base of the radial tire all adopt special IBR, the IBR has a high side branch and trans-1, 4 addition unit, wide molecular mass distribution and long-chain branched two-block structure, the compatibility between the base and the sidewall, between the base and the tread and between the tread and the sidewall can be improved, and after the whole tire blank is vulcanized, the tire blank is not prone to falling off, so that the service life of the tire blank is prolonged, and the service life of the tire blank is prolonged. The anti-aging and anti-cracking performances between the connecting and binding surfaces of all the parts are enhanced, the stress and impact resistance of the tire body are improved, and the rolling resistance of the tire is reduced; especially, the composite rubber material has the characteristics of good adhesiveness with a steel wire, aging resistance, digging and winding fatigue resistance and the like, replaces BR or existing TBIR in a traditional formula (because the compatibility of BR and NR is poor, the prepared composite material is not resistant to aging and is easy to crack), and can be used as a basic material of a high-performance green tire.

The invention relates to the technical field of rubber, and discloses a light-weight high-wear-resistance rubber tire material and a preparation method thereof.The light-weight high-wear-resistance rubber tire material is prepared from 70-85 parts of natural rubber, 15-30 parts of butadiene styrene rubber, 2-6 parts of sulfydryl polysiloxane and other raw materials, and in the high-temperature vulcanization process, the wear resistance of the rubber tire material is greatly improved; active sulfydryl at the end position of sulfydryl polysiloxane can react with unsaturated alkenyl of the natural rubber and the styrene-butadiene rubber, so that the chemical crosslinking effect on the natural rubber and the styrene-butadiene rubber with high styrene content is realized, and the interface bonding strength between the natural rubber and the styrene-butadiene rubber is enhanced; according to the present invention, the polysiloxane has the flexible siloxane chain, such that the flexibility and the mechanical property of the rubber material can be improved after the polysiloxane, the natural rubber and the styrene butadiene rubber are subjected to the cross-linking reaction.

The application relates to the technical field of rubber, and discloses a carbon fiber-silicone rubber composite material, a preparation process and application in artificial limbs. The carbon fiber-silicone rubber composite material comprises 100 parts by weight of methyl vinyl silicone rubber, 3-5 parts by weight of a vulcanizing agent, 10-25 parts by weight of ABS resin, 3-6 parts by weight of carbon fiber and 0.8-2 parts by weight of a siloxane styrene-acrylonitrile copolymer. The siloxane styrene-acrylonitrile copolymer functions as a compatilizer, improves the compatibility between the ABS and the methyl vinyl silicone rubber, makes the composite material have better mechanical properties, shows higher tensile strength, elongation at break and tear strength, and the obtained silicone rubber composite material has better practical application in materials such as artificial limbs.

The invention relates to the technical field of rubber, in particular to a high-toughness wear-resistant flame-retardant silicone rubber composite material and a preparation method thereof. According to the composite material, vinyl-terminated polydimethylsiloxane and a vinyl-terminated (diphenyl siloxane)-dimethylsiloxane copolymer are taken as matrixes, and a reactive phosphorus-containing siloxane cross-linking agent is introduced to chemically bond a flame-retardant structure to a cross-linked network; and the hydroxylated boron nitride nanosheet modified by amino / alkenyl silane double paths is cooperated with the para-aramid pulp to construct a multi-dimensional enhancement system. According to the preparation method, through a sequential process of pre-reacting and then curing, catalyst poisoning is effectively avoided, and uniform dispersion and strong interface combination of the filler are ensured. The material has high mechanical strength, excellent wear resistance and lasting flame retardance, and is particularly suitable for sealing elements under the working condition of long-term vibration friction.

The application relates to a solution polymerization styrene-butadiene SSBR rubber and a preparation method thereof, and belongs to the technical field of solution polymerization styrene-butadiene rubber. The preparation raw materials of the solution polymerization styrene-butadiene SSBR rubber include 25-35 parts of styrene, 30-40 parts of butadiene, 75-85 parts of a cyclohexane solution, 0.5-1.5 parts of a polarity regulator, 2-5 parts of an atomization terminator and 0.5-2.5 parts of n-butyllithium. The preparation raw materials of the atomization terminator include 75-85 parts of isopropyl alcohol, 15-20 parts of an antioxidant 1520, 0.5-1.5 parts of cyclohexane, 0.3-0.6 parts of citric acid, 2-4 parts of a plant polyphenol extract and 0.2-0.5 parts of a crosslinking agent. By compounding the antioxidant 1520 and the multi-source purified plant polyphenol extract in the atomization terminator and matching the tannin acid-boric acid composite crosslinking system, a multiple synergistic heat-resistant protection and structure reinforcing mechanism is formed, and the defects of easy oxidative degradation, easy molecular chain rupture and serious performance attenuation of the traditional solution polymerization styrene-butadiene SSBR rubber under a high-temperature environment are effectively improved.

The invention discloses a composition for cleaning an open mill roller and a production process thereof, and belongs to the technical field of rubber, the composition comprises the following raw materials by weight: 95-100 parts of ethylene propylene diene monomer, 30-40 parts of fumed silica, 15-20 parts of precipitated silica, 10-15 parts of alumina, 5-8 parts of zinc oxide, 4-6 parts of composite coating functional powder, and 1-3 parts of stearic acid. According to the mode, in the preparation process of the composite coating functional powder, the carboxymethyl chitosan is subjected to chlorogenic acid modification, meanwhile, the coarse carbon dots are subjected to functional N-isopropylacrylamide modification, and a synergistic gain effect is achieved for improving the wear resistance, the working stability and the pollutant removal rate of the prepared composition.

The utility model relates to the technical field of silicone rubber provides a kind of silicone rubber multilayer injection mould, including lower mould plate, the bottom end of lower mould plate is equipped with backing plate, the both sides of backing plate are symmetrically provided with fixed structure, fourth mould plate is installed on lower mould plate, third mould plate, second mould plate and first mould plate are installed in turn on fourth mould plate from bottom to top, the inside of fourth mould plate, third mould plate, second mould plate and first mould plate are equipped with glue inlet, the outside of glue inlet is provided with heating structure, the both sides of the bottom end of fourth mould plate, third mould plate, second mould plate and first mould plate are symmetrically provided with positioning structure.The utility model is positioned by the positioning structure of setting, positioning block and positioning slot are engaged, can play certain positioning effect to each layer mould plate, improve the stability between mould plate, avoid the situation of displacement, rotate positioning screw rod, the position of positioning block can be adjusted, and then the levelness between each layer mould plate can be adjusted, improve injection effect.

The invention relates to the technical field of rubber, and particularly discloses application of astragalus polyferose as a carboxyl nitrile rubber functional aid. Astragalus polyferose is used as a multifunctional additive to be compounded with carboxylic butadiene-acrylonitrile latex, and the mechanical property of the adhesive film is enhanced through coordination of iron ions and rubber carboxyl and hydrogen bond synergy of polysaccharide hydroxyl and carboxyl; the material is endowed with excellent antibacterial property by utilizing a synergistic mechanism of astragalus polysaccharide and iron ions; and the thermo-oxidative aging and degradation process of the rubber material is accelerated by virtue of the efficient catalytic oxidation effect of iron ions on rubber molecular chains. According to the scheme, the problems that a traditional auxiliary agent is single in function and comprehensive performance cannot be synergistically improved are successfully solved, the environment degradability of the rubber is remarkably improved while the good mechanical and antibacterial performance of the rubber is kept, and an innovative and practical technical path is provided for achieving high-performance environment-friendly carboxy nitrile rubber products.

The application belongs to the technical field of modified rubber, and discloses a high-cavity nano starch, a high-aging-resistant rubber material based on the high-cavity nano starch and a preparation method of the high-cavity nano starch. The preparation method of the high-cavity nano starch comprises the following steps: sequentially performing gelatinization pretreatment and single-helix structure modification treatment on starch, and then performing homogenization treatment in an ultrahigh-pressure nano material preparation dispersing machine to obtain the high-cavity nano starch. The method can prepare a nano starch emulsion with high stability, the starch has a high-cavity structure and a nano-level particle size, and the dispersibility of the starch is significantly improved when the starch is mixed with natural latex. The high-cavity nano starch can be applied to rubber reinforcement, and the obtained rubber material has significantly improved tensile strength and tear strength, the tensile strength is increased by 34%, the tear strength is increased by 58%, and the rubber material has excellent aging resistance without adding an anti-aging agent, so that the problems of uneven rubber compound, increased defects, discoloration and environmental pollution caused by the addition of the anti-aging agent in the existing rubber are solved.