42 results about "Filler network" patented technology

The invention belongs to the field of heat conduction materials, and particularly relates to gradient interface modified aluminum oxide-aluminum nitride bi-component heat conduction filler and a preparation method thereof, and the gradient interface modified aluminum oxide-aluminum nitride bi-component heat conduction filler comprises spherical aluminum oxide, flaky aluminum nitride and double gradient modified layers coating the surfaces of the spherical aluminum oxide and the flaky aluminum nitride; the D50 of the spherical aluminum oxide is 2-5 microns, and the sphericity is greater than or equal to 0.85; the sheet-shaped aluminum nitride is in a hexagonal sheet shape, the average particle size is 8-12 microns, the thickness is 200-500 nanometers, and the radius-thickness ratio is 20-50; the mass ratio of the spherical aluminum oxide to the flaky aluminum nitride is (40-70): (30-60); the double-layer gradient modification layer comprises an inner-layer hydrophobic silane layer and an outer-layer reactive silane layer, the inner-layer hydrophobic silane layer is formed by grafting alkyl trialkoxy silane with the carbon chain length of 8-16, the outer-layer reactive silane layer is formed by grafting a silane coupling agent containing an epoxy group or an amino group, and morphological complementary optimization of a filler network is achieved.

The invention relates to a high-efficiency heat dissipation circuit board and a manufacturing method thereof, and the manufacturing method comprises the steps: constructing a raw material performance database through the structural collection and evaluation of the physical parameters of a high-thermal-conductivity nanofiller and a resin matrix, and guiding the nanofiller to adaptively migrate and locate along the gradient through the adjustment of the partition solvent evaporation rate and the interfacial tension gradient. And an efficient heat-conducting filler network with orderly partitions is formed. Furthermore, in-situ multi-mode detection and automatic feedback optimization are combined, the dispersion uniformity of the filler and the continuity of a heat conduction channel are guaranteed, and the circuit board with uniform heat dissipation performance is prepared through a medium-low temperature step-by-step curing latch structure.

The invention provides a heat-conducting wave-absorbing composite material with a three-dimensional interpenetrating network structure as well as a preparation method and application of the heat-conducting wave-absorbing composite material. The preparation method of the composite material comprises the following steps: impregnating carbon fibers in an ethanol dispersion liquid containing titanate, graphene quantum dots and polydopamine, carrying out low-temperature in-situ polymerization, and carrying out suction filtration and drying to obtain surface-functionalized carbon fibers; mixing the functionalized carbon fibers with an MXene / BNNS dispersion liquid, and performing freeze drying to obtain a functionalized carbon fiber three-dimensional honeycomb network skeleton; and impregnating the functionalized carbon fiber three-dimensional honeycomb network skeleton in a resin precursor solution containing a functional filler and a flame retardant to fill network gaps with resin, and heating and curing to obtain the composite material. The composite material completely meets the thermal management and electromagnetic compatibility requirements of 6G high-flux chip packaging; especially in a 6G AiP module, the material can effectively solve the problems of heat and electromagnetic interference generated by a high-power chip, and provides important support for commercial application of a 6G communication technology.

The invention relates to the technical field of production of vulcanized rubber soles, and discloses a high-wear-resistance vulcanized rubber sole and a preparation method thereof. Comprising the following raw materials in parts by mass: 90-100 parts of natural rubber, 50-60 parts of butadiene styrene rubber, 20-30 parts of a reinforcing agent, 15-20 parts of acid and alkali resistant filler, 5-10 parts of white carbon black, 4-6 parts of an activating agent, 3-5 parts of an anti-aging agent, 4-5 parts of a softening agent, 2-5 parts of a vulcanizing agent and 4-6 parts of a vulcanization accelerator. The reinforcing filler can participate in vulcanization reaction of rubber, so that the reinforcing filler forms a complex filler network in the rubber sole, the reinforcing filler is fixed in a rubber molecular chain, the wear resistance and mechanical property of the rubber sole are improved, and the movement ability of the reinforcing filler in the rubber molecular chain is limited; mutual friction between the reinforcing filler and a rubber molecular chain is inhibited, the wear resistance of the rubber sole material is improved, the acid and alkali resistant filler can hinder permeation of acid and alkali media, and the acid and alkali resistant performance of the rubber sole material is improved.

The invention belongs to the technical field of thermal management materials, and particularly relates to a modified boron nitride-epoxy resin composite material and a preparation method and application thereof. The modified boron nitride-epoxy resin composite material provided by the invention comprises an epoxy resin matrix and a heat-conducting filler dispersed in the epoxy resin matrix, the heat conduction filler comprises glycine modified boron nitride and magnetic modified boron nitride nanosheets, and the magnetic modified boron nitride nanosheets are glycine modified boron nitride nanosheets coated with ferroferric oxide particles. According to the invention, glycine modified boron nitride and magnetic modified boron nitride nanosheets are adopted as heat-conducting fillers, so that the interface interaction is enhanced, the dispersity of the boron nitride fillers in an epoxy resin matrix is improved, and the heat-conducting fillers form a filler network with a three-dimensional structure in the epoxy resin matrix, so that free transmission of phonons is facilitated; therefore, the heat conductivity of the modified boron nitride-epoxy resin composite material is improved.

The application provides a low-friction high-wear-resistance resin-based composite material and a preparation method and application thereof, and belongs to the field of composite materials. The polytetrafluoroethylene nano powder modified by radiation is used together with inorganic filler particles such as graphite nano powder, molybdenum disulfide nano powder and the like to prepare a polyphenylene sulfide-based composite material at a certain compounding ratio. The composite material shows excellent tribological properties. On this basis, by adding a chopped carbon fiber and the like as a reinforcing filler, a high-strength, low-friction high-wear-resistance polyphenylene sulfide-based composite material is prepared by using a multi-scale functional filler network structure constructed inside the composite material. The technical process route of the application is simple, and the manufacturing cost is low. The application can be used for preparing friction protection parts, low-friction wear-resistant structures, wear-resistant bearings, self-lubricating parts, mechanical gaskets and the like under dry friction, and has a very broad application prospect in the fields of aerospace, transportation, electronic devices and high-end mechanical equipment.

The invention discloses a montmorillonite / cellulose nanocrystalline composite film as well as a preparation method and application thereof. The method disclosed by the invention comprises the following steps: firstly, preparing polyether amine D230 modified montmorillonite aqueous dispersion by taking polyether amine D230 as a modifier; and mixing the polyether amine D230 modified montmorillonite aqueous dispersion liquid with the carboxylated cellulose nanocrystal aqueous dispersion liquid, and carrying out solvent exchange to prepare the montmorillonite / carboxylated cellulose nanocrystal hybrid organic solvent dispersion liquid. Finally, a cross-linking agent is introduced to enhance the interface interaction between the montmorillonite and the carboxylated cellulose nanocrystals. According to the preparation method provided by the invention, stable dispersion of montmorillonite is realized by utilizing a dispersion effect of carboxylated cellulose, and lyotropic liquid crystal characteristics of carboxylated cellulose nanocrystals are combined; a montmorillonite filler network with an ordered structure is constructed through a solvent evaporation self-assembly method, so that the high-barrier-property composite film with a brick-mud structure is prepared. The composite film provided by the invention has a wide application prospect in the field of packaging materials.

The invention relates to the technical field of oil paints, in particular to an oil paint and a preparation method thereof. The oil paint is prepared from the following raw materials in parts by weight: 60-80 parts of oil, 40-50 parts of toner, 20-30 parts of filler, 20-30 parts of palm wax, 5-7 parts of stearic acid, 5-7 parts of dammar resin, 4-6 parts of polyamide resin and 2-4 parts of lubricating oil. According to the invention, after the ox horn powder is subjected to enzymolysis treatment, residual animal fat in the ox horn powder is hydrolyzed into glycerol and free fatty acid by lipase, so that the grease content of the ox horn powder is reduced, meanwhile, the compact structure of keratin can be destroyed, the porosity and specific surface area of the ox horn powder are increased, and the binding capacity of the ox horn powder with other components is improved; and toner particles can be fixed through Van der Waals' force, and dissociation and migration of the toner in a pigment coating are reduced, so that the toner is firmly anchored in a filler network and is not easy to fall off even if the toner is rubbed by external force, and the color fastness of the oil paint is effectively improved.

The present invention belongs to the field of flow batteries, and specifically discloses a carbon-plastic composite plate and its preparation method and application. The present invention realizes the uniform mixing of carbon materials and nano-resins through air convection, enables the nano-resins to be orderly stacked on the surface and between the layers of the carbon materials, improves the swelling and rebound during the molding process, and further inhibits the volume effect and the generation of micro-cracks of the formed plate. A continuous conductive and heat-conductive filler network can be formed, so that the carbon-plastic composite plate has a low resistivity and conductivity, and the nano-resin containing a carbazole unit has high thermal stability and is not easily aged in the battery environment.

The invention belongs to the technical field of rubber materials, and particularly relates to an anti-abrasion slurry pump rubber lining material and a preparation process thereof. On the basis of the prior art, anti-aging rubber and reinforcing wear-resistant filler are added into natural rubber for modification and vulcanization to prepare the anti-abrasion slurry pump rubber lining material, the rubber is epoxidized through hydrogen peroxide and acetic acid, then furan groups are grafted for modification, and N, N-dimethyl formamide is grafted for modification. The anti-aging rubber prepared by crosslinking N, N '-m-phenylenedimaleimide has excellent wear resistance and erosion resistance, the impact resistance and tensile strength of the lining material are improved by introducing epoxy groups, and the anti-aging rubber can be self-crosslinked at normal temperature and can repair cracks between the rubber; the silicon dioxide intercalated graphite structure improves the mechanical property of the filler, the boron nitride is embedded in the surface of the intercalated graphite to form a three-dimensional filler network structure, the gap filling of the rubber is tighter, and the rubber has excellent reinforcing performance; the abrasion-resistant mud pump rubber lining material prepared by the invention has excellent abrasion resistance and erosion resistance.

The invention discloses an electromagnetic protection TPU composite material for a flexible robot joint and a preparation method and application thereof, and belongs to the technical field of high polymer materials. According to the technical scheme, the composite material is prepared from components in percentage by mass as follows: a polyester type TPU matrix, graphene oxide, carboxylated multi-walled carbon nanotubes, ferroferric oxide and urea. The preparation method comprises the following steps: dispersing graphene oxide, carboxylated multi-walled carbon nanotubes and urea in water to form uniform slurry; performing one-way freezing and freeze drying on the slurry to obtain a three-dimensional porous aerogel preform; dipping in a ferric salt ethanol solution to obtain saturated aerogel; transferring the saturated aerogel into a high-pressure reaction container, and carrying out solvothermal reaction; washing and freeze-drying to obtain a three-dimensional network architecture; dipping in a polyester type TPU (Thermoplastic Polyurethane) matrix solution; and curing and hot-pressing to obtain the TPU composite material. The electromagnetic protection TPU composite material disclosed by the invention can realize accurate construction and strong interface combination of a filler network.

The present invention provides a highly thermally conductive and electrically insulating polymer composite material with an oriented, isolated dual-filler network. Using carbon nanotubes and boron nitride as dual fillers, the composite material is successfully prepared through melt blending, mechanical blending, annealing, and orientation structure control. This composite material exhibits high thermal conductivity and electrical insulation properties at relatively low filler loadings. The preparation process is simple and easy to operate, and can be produced using existing equipment, facilitating widespread application.

The present invention discloses a high thermal conductivity propenyl insulating material and a preparation method thereof, the propenyl insulating material comprises a propene polymer and a boron nitride filler, the boron nitride filler comprises micron boron nitride and nano boron nitride with a mass ratio of 3: 7-7: 3, the micron boron nitride particles with a particle size of 1-3 [mu] m account for 40-50 wt%, and the nano boron nitride particles with a particle size of 1-3 [mu] m account for 40-50 wt%. The proportion of particles with the particle size of 100-300nm in the nano boron nitride is 40-50wt%, and the content of the boron nitride filler in the allyl insulating material is 10-20wt%. According to the invention, by regulating and controlling the proportion and size distribution of two kinds of boron nitride with different sizes, a heat-conducting filler network is formed to improve the heat-conducting property of the material and play a role in nano eutectic self-enhancement, and the breakdown performance and dielectric loss of the material are improved instead of being reduced.

The invention relates to the technical field of polyamide composite materials, and discloses a flame-retardant and heat-conducting polyamide composite material and a preparation method thereof, the flame-retardant and heat-conducting polyamide composite material comprises the following components: 40-80 parts by weight of polyamide resin, 20-50 parts by weight of a composite heat-conducting filler, 5-20 parts by weight of a nitrogen flame retardant, and 0.5-5 parts by weight of an auxiliary agent; wherein the composite heat-conducting filler is formed by mixing boron nitride subjected to surface modification by a silane coupling agent and aluminum oxide; wherein the auxiliaries comprise 0.1 to 1 part by weight of a coupling agent, 0.2 to 2 parts by weight of an antioxidant and 0.2 to 2 parts by weight of a lubricating agent. According to the invention, the charring effect of the nitrogen flame retardant and the collaborative network construction of the composite filler are combined with the surface modification technology, so that the flame-retardant and heat-conducting properties are respectively improved, the positive synergy of the nitrogen flame retardant and the composite filler is realized, the stable carbon layer protects the heat-conducting network, and the uniformly dispersed filler network also provides stable support for the flame-retardant system.

The application provides a heat-conducting gel, a preparation method and application thereof, and the preparation raw material of the heat-conducting gel comprises silicone oil, a silane coupling agent, a catalyst and compounded heat-conducting filler powder; and the fractal dimension of the heat-conducting filler network in the heat-conducting gel is 2.3-2.4. The heat-conducting gel provided by the application takes silicone oil as a matrix, takes compounded heat-conducting filler powder as heat-conducting filler, and controls the fractal dimension of the heat-conducting filler network in a specific range, so that the heat-conducting gel has high heat conductivity, low modulus, high toughness and high fatigue resistance.

The butadiene styrene rubber composition is prepared from the following components in parts by mass: 100 parts of butadiene styrene rubber, 65 to 95 parts of reinforcing filler, 5 to 10 parts of plasticizer, 10 to 20 parts of polyurethane prepolymer and 8 to 12 parts of vulcanization system, wherein the plasticizer adopts liquid isoprene rubber. According to the styrene-butadiene rubber composition, styrene-butadiene rubber is taken as a matrix, a physical filler network is constructed by the reinforcing filler, a reversible hydrogen bond network is constructed by the polyurethane prepolymer, and dual-network enhancement is realized, so that a material basis can be provided for high strength and high toughness of vulcanized rubber products, and the tear resistance and cutting resistance of the vulcanized rubber products are effectively improved; and the self-repairing force is enhanced. On the basis, the invention also discloses a preparation method of the styrene-butadiene rubber composition, so as to prepare the styrene-butadiene rubber composition. Besides, the invention also discloses an application method of the styrene butadiene rubber composition, and the styrene butadiene rubber composition is applied to the field of soles, so that the problem that the traditional styrene butadiene rubber soles are insufficient in tear resistance and cutting resistance can be effectively solved.

The invention discloses a preparation method of a double-filler network polymer antistatic composite film for transferring an integrated circuit chip, which comprises the following steps: uniformly mixing polystyrene with a coupling agent NDZ-201 modified acetylene carbon black and a multi-walled carbon nanotube, extruding and pelletizing to obtain composite granules; and hot-pressing the granules to obtain the composite film. The acetylene carbon black and the multi-walled carbon nanotubes are staggered to form a conductive network, so that the contact area between the fillers and the contact area between the fillers and a matrix are increased, and the antistatic performance of the polystyrene-based composite film is remarkably improved under the condition of low filler amount.

The invention discloses a high-strength wear-resistant rubber material and a preparation method thereof, and belongs to the technical field of rubber materials. The material comprises carboxyl nitrile rubber, hydrogenated nitrile rubber, carboxyl-terminated liquid nitrile rubber, a composite reinforcing filler, a vulcanizing agent, a cross-linking agent and the like. The composite reinforcing filler is prepared by alkalifying lignin, chemically bridging the alkalified lignin with nano-silica through an epoxy silane coupling agent KH560, and compounding the alkalified lignin with carbon black. The preparation method of the rubber material comprises the following steps: firstly, mixing the three kinds of rubber to obtain a matrix rubber material, then adding the composite reinforcing filler and other auxiliaries for mixing, and finally adding a vulcanization system for vulcanization molding. The lignin is firmly integrated into a filler network through chemical coupling and forms strong interface bonding with a rubber matrix, so that high strength is guaranteed, excellent wear resistance, tear resistance and dynamic fatigue resistance are achieved, and the lignin-based wear-resistant rubber material is especially suitable for wear-resistant parts of mining equipment and the like under harsh working conditions.

The invention relates to a hydrotalcite / hydrogenated butadiene-acrylonitrile rubber raw material composition, sealing rubber and a preparation method thereof. The hydrotalcite / hydrogenated butadiene-acrylonitrile rubber composition provided by the invention is prepared from the following components in parts by weight: 100 parts of hydrogenated butadiene-acrylonitrile rubber, 5 to 30 parts of hydrotalcite, 5 to 50 parts of spherical nanoparticles with the original particle size of more than 30nm, 0.1 to 5 parts of vulcanizing agent, 0.1 to 5 parts of auxiliary vulcanizing agent and 5 to 40 parts of plasticizer, wherein the hydrotalcite is dispersed in a hydrogenated butadiene-acrylonitrile rubber matrix to form the hydrotalcite / hydrogenated butadiene-acrylonitrile rubber master batch. In the aspect of rubber matrix selection, hydrogenated butadiene-acrylonitrile rubber with more excellent aging resistance is selected. In terms of key filler selection, hydrophilic lamellar filler hydrotalcite is selected, a lamellar filler network formed by the hydrophilic lamellar filler hydrotalcite can form a more effective hindering channel for oil molecules, spherical particles and lamellar particles which are large in size and weak in enhancement performance are selected to be compounded for use, and synchronous improvement of barrier performance and rebound resilience is achieved.

The application discloses a method for preparing a composite material by loading nanometer particles on a fiber and filling an epoxy resin and application thereof. The method is characterized by the following steps: a semiconductor nanometer particle SiC is loaded on a filler network structure of a glass fiber fabric surface; and a plasma treatment technology is combined to activate the fiber surface, so that a stable and efficient fiber loading nanometer particle structure preparation is realized. Based on the structure, an epoxy resin is infiltrated to obtain a composite material. In the composite material, the nanometer SiC particles can be used as a connecting point to form a charge dissipation path, so that the surface charge dissipation rate of the material is obviously improved, and thus the surface flashover voltage of the material is improved.

The invention discloses an amino acid modified hexagonal boron nitride / epoxy resin heat-conducting anticorrosive coating and a preparation method thereof. The heat-conducting anticorrosive coating comprises the following components in parts by mass: 5-50 parts of amino acid modified hexagonal boron nitride, 30-70 parts of epoxy resin, 5-15 parts of a diluent and 5-15 parts of a curing agent. The hexagonal boron nitride is subjected to surface functionalization modification through amino acid, the interface bonding force between h-BN particles and a polymer matrix is effectively improved, heat is promoted to be rapidly transferred along a filler network, and the hexagonal boron nitride subjected to surface functionalization treatment is combined with epoxy resin to prepare the composite heat-conducting anticorrosive coating. The amino acid modified hexagonal boron nitride and the epoxy resin have a synergistic effect, so that the obtained heat-conducting anticorrosive coating is endowed with excellent heat-conducting efficiency and anticorrosive protection capability.

This invention discloses a high-damping EPDM rubber composite material and its preparation method. The technical solution adopted in this invention is as follows: First, excess functionalized liquid rubber and graphene oxide are uniformly mixed in a solvent. The carboxyl and amino groups in the liquid rubber react chemically with the oxygen-containing functional groups such as hydroxyl groups on the surface of the graphene oxide to prepare liquid rubber-modified graphene oxide. The modified graphene oxide is then composited with EPDM rubber, and hindered phenol, crosslinking agent, antioxidant, and plasticizer are added simultaneously. After high-temperature vulcanization, the liquid rubber-modified graphene oxide / hindered phenol / EPDM rubber composite material is obtained. The small molecules of liquid rubber, the graphene oxide filler network, and the hydrogen bonding between graphene oxide and hindered phenol synergistically improve the damping performance of the EPDM composite material.

This invention discloses an ultra-low rolling resistance tire tread compound, which comprises, by weight: 8-12 parts natural rubber, 12-18 parts butadiene rubber, 22-28 parts solution-polymerized styrene-butadiene rubber, 20-26 parts silica, 5-10 parts modified silica, 0.8-1.2 parts activator ZnO, 0.2-0.5 parts activator SA, 2-3 parts antioxidant, 2-4 parts super tackifying resin, 3-5 parts modified resin, 1.5-2 parts silane coupling agent, 2-3 parts processing aid, 0.8-1.2 parts vulcanizing agent, 0.8-1.2 parts accelerator NS, and 0.8-1.2 parts accelerator DPG. The solution-polymerized styrene-butadiene rubber has a styrene content of 20%-25% and a vinyl content of 60%-70%, the butadiene rubber has a vinyl content of 11%-15%, the modified silica is ultrafine silica powder, and the modified resin is hydrogenated copolymerized petroleum resin. Through the synergistic effect of a rubber compound system with specific microstructure and double silica, the hysteresis loss of the filler network is significantly reduced, resulting in a Tanδ@60℃ value of 0.059 for the tread rubber and a rolling resistance of 4.9 N / kN for the tire. It also has good physical properties and can effectively improve the driving range of electric vehicles, showing good market application prospects.

The invention discloses a rubber composite material for a sealing ring and a preparation method of the rubber composite material, and belongs to the technical field of processing and preparation of rubber sealing rings. Comprising the following components in parts by weight: 80-100 parts of chloroprene rubber, 20-30 parts of natural rubber, 20-30 parts of white carbon black, 10-15 parts of silicon dioxide, 2-4 parts of magnesium oxide, 0.5-0.8 part of stearic acid, 3-4 parts of p-phenylenediamine, 35-48 parts of modified microcrystalline cellulose, 1-2 parts of zinc oxide and 2-4 parts of sulfur. According to the invention, the swelled microcrystalline cellulose is used as a carrier for reaction, tetraethoxysilane is subjected to adsorption reaction, so that silicon dioxide gel is uniformly deposited on the surface of the microcrystalline cellulose, microcrystalline cellulose-nano-SiO2 hybrid powder is added into the rubber composite material, the density of a white carbon black filler network is reduced, and the wear resistance of the rubber composite material is improved. Due to the loose structure of the filler network, the heat of the rubber in the compression process is reduced, so that the compression heat is reduced, and the wear resistance of the sealing ring is improved.

The invention relates to an easy-to-bend rubber plate and a preparation method thereof. The easy-to-bend rubber plate comprises the following components in parts by weight: 90-100 parts of methyl vinyl silicone rubber; 8-20 parts of a plasticizer; 35 to 45 parts of reinforcing filler; 0.8-1.2 parts of a vulcanizing agent; 3-5 parts of a structured control agent; according to the invention, the carbon nanotubes can be interpenetrated and lapped with the fumed silica aggregate to form a compact three-dimensional mixed filler network of '1 + 1 > 2', so that a basic reinforcement structure is constructed by virtue of the strong binding force of the nanoscale particle size of the fumed silica and a rubber molecular chain, and the carbon nanotubes are connected with the fumed silica aggregate to improve the stability of the network and efficiently transmit and disperse stress; the compactness and the flexibility of the mixed filler network are matched, compared with a single filler network, the stress transmission is more uniform, the local stress concentration during bending can be reduced, the characteristic of easy bending is ensured, the structural strength is not sacrificed, and the technical problem that the traditional reinforcing filler is hardened, namely the flexibility is lost is solved.

The application discloses an electromagnetic protection TPU composite material of a flexible robot joint and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The technical scheme is as follows: the composite material is composed of the following components in mass percentage: a polyester TPU matrix, graphene oxide, carboxylated multi-walled carbon nanotubes, ferroferric oxide and urea; the preparation method comprises the following steps: dispersing the graphene oxide, the carboxylated multi-walled carbon nanotubes and the urea in water to form a uniform slurry; unidirectionally freezing the slurry, freeze-drying to obtain a three-dimensional porous aerogel preform; immersing the preform in an iron salt ethanol solution to obtain a saturated aerogel; transferring the saturated aerogel to a high-pressure reaction container to perform a solvothermal reaction; washing, freeze-drying to obtain a three-dimensional network architecture; immersing a polyester TPU matrix solution; and solidifying and hot-pressing to obtain the TPU composite material. The electromagnetic protection TPU composite material can realize precise construction of a filler network and strong interface combination.

The application belongs to the technical field of fillers, and specifically discloses a preparation method of a biological matrix loaded white carbon black, which comprises the following steps: (1) constant temperature of a bottom liquid, while dropping weakly acidic biological matrix slurry and sodium silicate solution, adding acidic substances to maintain pH at 6-8, and aging; (2) after the aging is completed, dropping acidic substances to pH at 3-6, and continuously stirring until the temperature is stable; (3) after the pH is adjusted, while dropping strongly acidic biological matrix slurry and sodium silicate solution, adding acidic substances to maintain pH at 3-6, and aging after the dropping is completed; (4) filtering, washing and drying the slurry after the reaction in step (3), and the biological matrix loaded white carbon black is obtained. Through two-stage processes, the pH and dropping speed are controlled respectively, the biological matrix is controlled in an acidic condition throughout the whole process, the utilization problem that the biological matrix is difficult to be completely precipitated after being dissolved in an alkaline environment is avoided, and the accurate control of the loaded microstructure is ensured, so that a filler network with good dispersion and developed voids is formed.

This invention discloses a spherical-surface phase change coating for deep-earth oil pipelines and its preparation method. The steps are as follows: MXene powder and nanocapsules are modified with a modifier; the modified MXene powder and nanocapsules are mixed to undergo crosslinking or condensation reactions to form a composite filler with a three-dimensional interpenetrating "spherical-surface" composite structure; the composite filler is mixed and stirred with a binder and a curing agent to obtain a homogeneous coating; the homogeneous coating is sprayed onto the surface of a substrate, and after curing, a spherical-surface phase change coating with frictional heat management and corrosion protection functions is obtained. This invention constructs a spherical-surface phase change filler network by in-situ composite formation of phase change microcapsules loaded with corrosion inhibitors and MXene materials. When the coating is under frictional conditions, the microcapsule core material undergoes a solid-liquid phase change, alleviating coating failure caused by frictional heat accumulation. When the coating is damaged, some microcapsule shells rupture, allowing the loaded corrosion inhibitor to be continuously released, giving the coating an adaptive corrosion protection capability.

The invention provides a method for evaluating the influence of radiation-induced microstructure evolution on macroscopic performance. The method comprises the following steps: constructing a dual-network constitutive model; calculating the initial shear modulus and average chain length of the rubber network based on the chemical crosslinking density; based on the engineering stress-stretch rate data and the initial shear modulus and the average chain length of the rubber network, a dual-network constitutive model is adopted for fitting, and the initial shear modulus, the average chain length and filler aggregate distribution correlation constants of the filling network are obtained; based on the relationship between the initial shear modulus and the average chain length of the rubber network and the chemical crosslinking density, the relationship between the average chain length of the filling network and the interface layer content, and the relationship between the filler aggregate distribution correlation constant and the radiation dose, the relationship between the microstructure evolution and the macroscopic performance change in the radiation environment is determined. According to the method, the influence of radiation-induced microstructure evolution on the macroscopic performance can be more effectively researched, and the service life of related equipment filled with silicone rubber in a radiation industrial environment can be accurately evaluated.

The present invention relates to a vinyl silane controllable grafted latex polystyrene butadiene rubber (SBR) and a preparation method. First, an emulsifier and N-bromosuccinimide are added to SBR latex, and the mixture is reacted under a nitrogen atmosphere, with stirring to obtain brominated SBR latex. Then, a vinyl silane coupling agent, a catalyst, and a ligand are sequentially added to the brominated SBR latex, and the mixture is reacted under a nitrogen atmosphere, with stirring, and with activation of a reducing agent to prepare grafted SBR. The grafted SBR prepared using the method of the present invention has the advantages of controllable graft chain length, uniform length, and controllable graft density. The grafted vinyl silane can better achieve uniform distribution of silica in the rubber, construct an efficient filler network, reduce the Payne effect, and ultimately achieve effective reinforcement of the SBR by silica.