20 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 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 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 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.

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 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 relates to the field of manufacturing of insulating materials of power equipment, in particular to a manufacturing method of an insulating shell of an insulating piercing wire clamp, and aims to solve the problems that in the prior art, directional arrangement control of filler is difficult to realize, so that the material has obvious anisotropic characteristics, and the performance difference in different directions is obvious. The comprehensive performance of the insulating shell is effectively improved. The synergistic effect of the base material and the nano filler ensures the mechanical strength and impact resistance of the shell, and the design of the heterogeneous filler network optimizes the heat conduction and insulation properties at the same time. The anisotropy of the material is remarkably reduced by the external field orientation and cross lamination process, so that the performance of the material is kept stable in a complex stress environment. According to the multi-layer surface protection structure, through the synergistic effect of the hydrophobic barrier and the conductive path, the arc resistance and the dirt adhesion resistance are greatly improved. And the flowability in the forming process is optimized by introducing the processing aid, and the forming precision and consistency of the shell with the complex structure are ensured.

The preparation method comprises the following steps: preparing a modified single-walled carbon nanotube, preparing a polyether-ether-ketone lubricant dispersion liquid, uniformly mixing set components in parts by weight, standing and curing at a set temperature, adding the cured material into a pre-pressing machine, pre-pressing and molding to form a columnar mold material, and carrying out high-wear-resistance polytetrafluoroethylene on the columnar mold material to obtain the high-wear-resistance polytetrafluoroethylene monofilament. And extruding the columnar mold material to form a precursor, carrying out oil removal treatment on the precursor, stretching, sintering, and carrying out heat setting. A modified single-walled carbon nanotube and nanosilicon dioxide synergistic enhancement system is adopted to construct a three-dimensional network enhanced structure, specifically, a conductive fiber network is formed by the modified single-walled carbon nanotubes, network gaps are filled with the nanosilicon dioxide as rigid particles, and a rigid-flexible structure is formed; and the wear resistance of the polytetrafluoroethylene monofilament is greatly improved through cooperation of the two components. Meanwhile, polyether-ether-ketone is introduced into the raw materials to serve as an auxiliary reinforcement phase, and the excellent wear resistance and mechanical performance of the polyether-ether-ketone and polytetrafluoroethylene form performance complementation.

This invention discloses a toughened and reinforced antifouling PVC-U material, its preparation method, and its application, relating to the field of water supply pipes. The PVC-U material comprises: 100 parts PVC, 10-20 parts ultrafine wollastonite powder, 5-20 parts graphene oxide, 1-3 parts impact modifier, and 0.5-1 parts dispersant; the ultrafine wollastonite powder has a D97 particle size ≤100 nm. The toughened and reinforced PVC-U material provided by this invention incorporates graphene oxide and ultrafine wollastonite powder into PVC. These two fillers with different dimensions can form a dense filler network. Therefore, graphene oxide can increase the amount of ultrafine wollastonite powder added to the PVC substrate, allowing the ultrafine wollastonite powder to fully exert its toughening and stiffening effects, thereby improving the mechanical properties of the PVC-U material.

The application belongs to the technical field of paint, and discloses a kind of acrylic modified polysiloxane / hexagonal boron nitride composite heat-conducting anticorrosive paint and preparation method thereof.The heat-conducting anticorrosive paint includes the following components by mass fraction: 60-80 parts of acrylic modified polysiloxane resin, 4-20 parts of modified hexagonal boron nitride, and 6-15 parts of curing agent.The application effectively improves the interfacial bonding force between h-BN particles and polymer matrix by surface functionalization modification of hexagonal boron nitride, promotes the rapid transfer of heat along the filler network, and combines the surface functionalization treated hexagonal boron nitride with acrylic modified polysiloxane to obtain a composite heat-conducting anticorrosive paint;the acrylic modified polysiloxane resin and the modified hexagonal boron nitride have a synergistic effect, and the obtained heat-conducting anticorrosive paint has excellent heat-conducting efficiency and corrosion protection ability.

The present application relates to a kind of high-efficiency heat dissipation circuit board and its manufacturing method, which constructs raw material performance database by the structuralization collection and evaluation of high thermal conductivity nano filler and resin matrix physical parameters, guides the self-adapting migration and positioning of nano filler along gradient by adjusting partition solvent evaporation rate and interfacial tension gradient, forms the partition ordered high-efficiency heat conduction filler network.Further combined with in-situ multimodal detection and automatic feedback optimization, the uniformity of filler dispersion and heat conduction channel continuity are guaranteed, and the preparation of circuit board with uniform heat dissipation performance is realized through step-by-step curing and locking structure of low temperature.