92 results about "Polyethylene matrix" patented technology

The invention relates to the technical field of cables, and discloses a multilayer flame-retardant heat-conducting crosslinked polyethylene cable structure and a preparation process thereof. The product sequentially comprises a conductor layer, a heat-conducting flame-retardant buffer layer, a flame-retardant reinforced linkage layer and an outer sheath layer from inside to outside, wherein the heat-conducting flame-retardant buffer layer comprises a cross-linked polyethylene matrix, boron nitride, aluminum hydroxide and a shape memory polymer, and the outer surface of the heat-conducting flame-retardant buffer layer is provided with interlocking bulges with embedded heat-conducting microtubes; the flame-retardant reinforced linkage layer contains a cross-linked polyethylene matrix, expanded graphite and graphene, and a groove with a flame-retardant elastic piece is formed in the inner surface of the flame-retardant reinforced linkage layer. The preparation method comprises the following steps: firstly preparing the silver-plated conductor, then respectively preparing the heat-conducting flame-retardant buffer layer and the flame-retardant reinforced linkage layer, then aligning the two layers, carrying out hot-pressing compounding, carrying out irradiation crosslinking on the composite structure, and finally extruding and coating the outer sheath and carrying out cooling shaping. The product can be used in scenes of new energy power stations, data centers and the like, and has the advantages of synergism of flame retardance and heat conduction and long-term stability of an interlayer structure.

The invention relates to a wear-resistant waterproof cable sheath material and a preparation method thereof, and belongs to the technical field of cable materials. The cable sheath material is prepared by self-making a modifier and blending the modifier with a fumed silica modified filler modified by a perfluoroalkyl silane coupling agent, FEP and polyethylene. Perfluoroalkyl of the modified filler and FEP cooperate to improve the water resistance and corrosion resistance of the material; the modifier can enhance the polarity of a polyethylene matrix, forms polarity gradient matching with other components of the system, enhances the interfacial compatibility, and improves the mechanical properties of the material; a benzotriazole structure in the modifier can prevent the material from being damaged by ultraviolet irradiation; besides, during combustion, phosphorus in the material forms a carbon layer on the surface, nitrogen in benzotriazole serves as a foaming agent to expand the carbon layer, efficient flame retardance is achieved synergistically, the material has excellent ultraviolet resistance and flame retardance, and the service life of the material is prolonged.

The invention relates to the technical field of cable production, and discloses a new energy charging heat-conducting flame-retardant cable which sequentially comprises a conductor layer, a heat-conducting insulating layer, a self-healing layer, a shielding layer, a mechanical enhancement layer and a flame-retardant outer sheath layer from inside to outside. The conductor layer is formed by a plurality of stranded tin-plated copper wires or nickel-plated copper wires; the heat-conducting insulating layer is composed of a crosslinked polyethylene matrix, a two-dimensional heat-conducting filler and phase-change temperature-adjusting microcapsules, the two-dimensional heat-conducting filler comprises a mixture of boron nitride nanosheets oriented by an electric field and graphene, and the mass fraction of the filler is 40%-55%; a core material of the phase-change temperature-adjusting microcapsule is a compound of paraffin and stearic acid. According to the scheme, trace rare earth and silver elements are introduced into the conductor to form a Cu-Ag-RE solid solution structure, so that the crystal integrity and the oxidation resistance of the conductor are remarkably improved; the structure still keeps excellent conductivity and bending resistance at high temperature, so that the cable can stably operate for a long time in a high-temperature and strong ultraviolet environment during charging, and the conductivity efficiency is improved.

The application relates to the technical field of cables, and discloses an insulated high-voltage power cable and a preparation method thereof. The insulated high-voltage power cable comprises a conductor, a crosslinked polyethylene insulation layer, a shielding layer, a semi-conductive water-blocking tape, an anticorrosion layer, a sheath layer and the like. Polyethylene, modified boron nitride, dicumyl peroxide and an antioxidant are mixed, extruded through a screw extruder, granulated, and the crosslinked polyethylene insulation layer is obtained. The compatibility of the modified boron nitride with the polyethylene is improved, the bonding force is improved, the modified boron nitride can be more uniformly dispersed in the polyethylene matrix, the mechanical properties and the thermal conductivity of the polyethylene insulation layer are improved, the breakdown field strength of the polyethylene insulation layer is increased, the high-voltage resistance of the polyethylene insulation layer is improved, and the polyethylene insulation layer can be better applied to high-insulation high-voltage power cable materials.

The invention provides a high-thermal-conductivity polyethylene pipe master batch and a preparation method thereof. The master batch comprises polyethylene powder particles, a copolymer elastomer, surface-modified graphene, multi-walled carbon nanotubes and a processing aid. The raw materials are blended in two steps by adopting a solution-melting method, so that the heat-conducting filler is selectively and uniformly dispersed in a polyethylene matrix, and the percolation threshold value is effectively reduced. The two heat-conducting fillers with different shapes are compounded for use, so that a three-dimensional, efficient and stable heat-conducting network can be constructed, and rapid transportation of heat in the three-dimensional direction is realized. The copolymer elastomer is used as a stress concentration point to initiate crazing and a shear band, so that a large amount of impact energy is absorbed, and the effect of toughening polyethylene is achieved.

This invention relates to a composite mineral-modified polyethylene agricultural mulch film and its preparation method. The agricultural mulch film comprises a polyethylene matrix resin and a composite mineral filler dispersed therein. The composite mineral filler is composed of 27%~33% wollastonite, 18%~22% attapulgite, 27%~33% tourmaline, and 18%~22% hexagonalite, and undergoes electromagnetic oscillation physical activation treatment to achieve a specific surface area ≥250m² / g, a particle size ≤2μm, and the formation of hydroxyl active sites on the surface. This invention also discloses the preparation method and its dual functions of degradation and soil improvement. The agricultural mulch film has a tensile strength ≥18MPa, an elongation at break ≥400%, a biodegradation rate ≥70% after 6 months, a far-infrared emissivity ≥0.90, and a negative ion release ≥1200 ions / cm³. After 6~9 months of field use, it disintegrates, and the residual minerals continuously regulate soil pH, release trace elements, and improve the aggregate structure, achieving a virtuous cycle of mulch film degradation and soil improvement.

The application discloses a manufacturing method, product and application of an alloyed high-barrier polyethylene / polyamide film material, and belongs to the technical field of high-barrier film. The manufacturing method comprises the following steps: melt blending and extruding granulation are performed on a polyethylene / polyamide raw material mixture precursor, and then, after the polyethylene / polyamide mixture master batch obtained through the granulation is preheated to 180-200 DEG C, pulse high-pressure mold forming and cooling are performed, so that the alloyed high-barrier polyethylene / polyamide film material is obtained. The manufacturing method can make the polyamide phase uniformly dispersed in the polyethylene matrix phase and transformed from a spherical dispersion state into a lamellar dispersion state, so that a "barrier wall effect" is formed in the polyethylene / polyamide film material, and the gas barrier property of the polyethylene / polyamide film material is effectively improved.

The invention relates to the technical field of foam materials, in particular to a modified polyethylene foam material and a preparation method thereof, and the modified polyethylene foam material comprises the following components: a polyethylene matrix, modified silicon dioxide aerogel, LDH-polyethylene-maleic anhydride, hydroxyapatite-stearic acid, a foaming agent, a cross-linking agent and an antioxidant. When a fire disaster occurs, LDH is heated and decomposed to form a first protective barrier, molten polyethylene liquid is prevented from permeating into pores, and redundant H < + > in a system is consumed by decomposed alkaline oxide. The phosphoaluminate inorganic network and an organic polymer generated by catalysis of ZnCl2 / FeCl3 form an organic-inorganic hybrid blocking layer, so that a second protective barrier is formed, pore gaps are flexibly filled with the organic layer, and the inorganic layer provides high-temperature stability. The stearic acid is preferentially coordinated with ZnCl2 / FeCl3 acid and is stable at the processing temperature of the foaming agent, so that the stearic acid cannot act with the foaming agent and a PE chain, and the foaming quality is guaranteed.

The invention relates to the technical field of functional filler, and discloses a crosslinked polyethylene fireproof cable and a preparation method thereof.The preparation method comprises the steps that a polyethylene matrix is added into a first feeding opening of an extruder; a silane coupling agent is added from a downstream second feeding port to homogenize and disperse the silane coupling agent in the matrix; an inorganic flame-retardant filler is added into a downstream third feeding port for in-situ grafting; by adopting the feeding time sequence, before the inorganic flame-retardant filler is added, the silane coupling agent is homogenized and dispersed in the low-viscosity polyethylene matrix in advance, so that the problem of low grafting efficiency caused by limited physical diffusion in the conventional process is solved, and the grafting efficiency is improved. The formation of chemical bonding on the surface of the filler is ensured, and the filler and a subsequent matrix cross-linking reaction generate synergy.

This invention relates to the field of antibacterial composite sphere preparation, and particularly to a graphene antibacterial composite sphere and its preparation method, comprising: high-speed dispersion of modified silver-loaded zeolite, graphene oxide, polyvinylpyrrolidone-block-polyacrylic acid, hydroxypropyl methylcellulose, and ascorbic acid; calculating dispersion state indices based on real-time monitored resistivity and particle size; dynamically adjusting the rotation speed to suppress shear damage; normalizing the dispersion state indices to parameter adjustment parameters of 1-10 to determine the screw speed and temperature setpoint of the twin-screw extruder; and real-time monitoring of 1710 cm⁻¹ during the extrusion process. ‑1 The drift of characteristic absorption peaks is dynamically compensated for by interfacial thermal degradation, and finally injection molding is performed. This invention achieves fine and stable dispersion and composite of graphene and silver-loaded zeolite in a polyethylene matrix through multi-level intelligent control, solving the problems of easy agglomeration of functional phases, easy degradation during processing, and poor batch consistency caused by rough process control in the prior art.

The application belongs to the technical field of composite materials, and particularly relates to a wear-resistant and deformation-resistant modified polyethylene composite material for a carrier roller and a preparation method thereof; the wear-resistant and deformation-resistant modified polyethylene composite material for the carrier roller comprises the following raw materials in parts by weight: 50-60 parts of HDPE, 20-30 parts of UHMWPE, 12-20 parts of a reinforcing filler, and 3-5 parts of PE-g-MAH; SCPP and MoS2 in the reinforcing filler form a core-shell structure through electrostatic adsorption, SCPP provides deformation resistance support for the composite material by virtue of its inorganic rigid skeleton, and the problem that the polyethylene matrix is easy to bend is solved; MoS2 is tightly coated on the surface of SCPP, the friction coefficient is reduced, and the agglomeration of MoS2 when added alone is avoided; PE-g-MAH forms chemical bonding with the hydroxyl groups on the surface of SCPP and the oxygen-containing groups on the edge of MoS2, the interfacial bonding force between the core-shell filler and the non-polar polyethylene matrix is significantly improved, and the interfacial defects are reduced.

The application belongs to the technical field of high polymer materials, and relates to a barrier pipe shoulder modification material, a barrier pipe shoulder and a preparation method thereof.The barrier pipe shoulder modification material comprises a polyethylene matrix, organic modified montmorillonite, high-density polyethylene and a compatibilizer in specific proportions, and the polyethylene matrix is low-density polyethylene and / or linear low-density polyethylene;the polyethylene matrix is subjected to double barrier modification by selecting organic modified montmorillonite and high-density polyethylene for matching, and the compatibilizer is used as an auxiliary, so that the finally obtained pipe shoulder modification material has excellent barrier performance;after the pipe shoulder injection molding raw material is mixed to form a pipe shoulder, the obtained pipe shoulder has excellent oxygen barrier performance, water barrier performance and mechanical performance.

This invention relates to a corrosion-resistant carbon-based composite material and its preparation method, belonging to the technical field of carbon-based composite materials. The invention involves creating a self-made modifier, then using this modifier and oxalic acid to dope aniline to obtain doped polyaniline. The doped polyaniline is then blended with high-density polyethylene and carbon nanotubes to obtain the corrosion-resistant carbon-based composite material. The phosphate ester groups in the modifier not only provide flame retardancy but also form complexes with the metal wire core. Together with the hydrophobic protective layer formed by the long-chain alkyl groups, they block the intrusion of water molecules and chemical media, giving the material excellent corrosion resistance. Furthermore, the aromatic heterocyclic structure in the modifier improves the overall heat resistance of the material and, in combination with the long-chain alkyl groups, ensures uniform dispersion of polyaniline and carbon nanotubes in the polyethylene matrix, enhancing the interfacial bonding between the three components, thereby improving the overall electrical conductivity and corrosion resistance of the material.

The invention relates to the technical field of PE pipes, in particular to an anti-aging high-toughness PE pipe and a preparation method thereof.The anti-aging high-toughness PE pipe is prepared from, by weight, 40-60 parts of high-density polyethylene, 20-30 parts of linear low-density polyethylene, 8-15 parts of an additive, 5-10 parts of a functional additive, 0.5-1.2 parts of calcium stearate and 0.3-0.8 part of a composite antioxidant B900. The functional additive is prepared by mixing tannic acid, nano silicon dioxide, neutral protease and horse radish peroxidase for reaction under an acidic condition and carrying out heating curing, centrifugal separation, drying and crushing processes, so that the problem that a common PE pipe is easy to age and embrittle in an outdoor environment is solved, the service life of the pipe is prolonged, and the service life of the pipe is prolonged. Active groups generated by enzymatic reaction in the functional auxiliary agent enhance the interfacial compatibility of the filler and a polyethylene matrix, so that long-term stable use of the filler in a complex environment is guaranteed.

The invention relates to the technical field of polyethylene materials, in particular to a high-barrier ultrathin toughened PE cast film and a preparation process thereof. The problem that in the prior art, the mechanical property and the barrier property of the PE cast film cannot be considered at the same time is solved. According to the invention, a nano blending filler composed of organic modified montmorillonite and graphene oxide, a composite compatilizer (maleic anhydride grafted polyethylene and maleic anhydride grafted POE elastomer), EVOH and an ultraviolet absorbent are introduced into a polyethylene matrix; a step-by-step melt extrusion process is adopted, matrix resin is added into a main feeding port, heat-sensitive filler, EVOH and an ultraviolet absorbent are synchronously added into a side feeding port, and corona and aging post-treatment are combined to obtain a PE cast film; the problem of compatibility among the components is effectively solved, a multi-scale collaborative network structure is formed, and balanced improvement of mechanical performance, barrier performance and weather resistance is achieved.

The invention relates to a preparation method of a PE anti-fogging master batch composition, and relates to the technical field of preparation of high polymer material functional assistants, and the master batch comprises polyethylene matrix resin, a compound anti-fogging agent, a porous adsorption carrier and a microcapsule end-capping reagent. The preparation method adopts the processes of adsorption, end sealing and dispersion, and comprises the following steps: firstly, adsorbing the liquid compound anti-fogging agent into pores of the porous carrier in vacuum, then heating to melt the microcapsule end sealing agent and quenching, constructing a high-crystallinity coating layer on the surface of the carrier in situ, and finally mixing and granulating with the matrix resin. The problems of processing slip and master batch adhesion caused by easy precipitation of a liquid auxiliary agent under high filling amount are solved through the microcapsule structure, controlled release of the antifogging agent is realized by utilizing the physical barrier effect of the end-capping layer, the fast-acting property and the long-acting property of the film are considered, the optical performance of the agricultural film is improved, and the service life of the agricultural film is prolonged.

The invention discloses a high-dispersity carbon black reinforced polyethylene sheath material and a preparation process, and relates to the technical field of high polymer materials, the high-dispersity carbon black reinforced polyethylene sheath material comprises the following components by mass fraction: a polyethylene matrix, a synergistic reinforced phase, a bifunctional bridged molecular system, a dynamic interface regulation and control system, an omnibearing protection system and an efficient processing aid. According to the preparation method, nano-scale uniform dispersion of the carbon black is realized through the design of a synergistic reinforced phase and the action of a difunctional bridged molecular system, and the particle size of the carbon black can be controlled within 50 nanometers. The carbon black and the amino-modified multi-walled carbon nanotubes form a point-line synergistic enhanced conductive network, so that the problems that single carbon black is easy to agglomerate and a conductive path is discontinuous are solved, the conductive percolation threshold is reduced, the volume resistivity of the material can be stably controlled within a target range, and meanwhile, the long-term stability of the conductive performance is improved.

The invention belongs to the technical field of bearing materials, and discloses vinyl hyperbranched polysiloxane, a polyvinyl composite material bearing and a preparation method.The preparation method of the vinyl hyperbranched polysiloxane comprises the following steps that a first siloxane monomer containing at least four vinyl groups and a second siloxane monomer containing sulfydryl are mixed, then adding a photoinitiator, uniformly mixing, and performing ultraviolet irradiation to obtain an intermediate; and slowly dropwise adding an aqueous medium into the intermediate, adding a catalyst at the same time, and then reacting at 60-90 DEG C for 4-8 hours to obtain the vinyl hyperbranched polysiloxane. According to the invention, an efficient and mild vinyl hyperbranched polysiloxane synthesis system is constructed, and the controllability and storage stability of the product structure are improved. According to the invention, high-efficiency compatibility of inorganic filler and a polyethylene matrix is realized by virtue of the synthesized vinyl hyperbranched polysiloxane, and the comprehensive performance and service reliability of the polyethylene-based composite material bearing are greatly improved.

This invention relates to the field of energy storage materials technology, specifically disclosing a graft-modified polyethylene dielectric material, its preparation method, and its applications. The material is prepared by chemically grafting 1-(3-thiopropyl)-2-vinylpyridine betaine (SPV) into the polyethylene backbone. The pyridine rings in the SPV side groups, through their conjugated electron effect, introduce localized energy level structures into the nonpolar polyethylene matrix, forming distributed deep-trap charge-capturing regions. This significantly suppresses the migration and collisional ionization of charge carriers under high electric fields, effectively improving the material's breakdown field strength and high-field service stability. Simultaneously, the grafting modification method does not disrupt the regular arrangement of the polyethylene backbone, thus maintaining the inherent low dielectric loss, good flexibility, and processing performance of polyethylene. It is particularly suitable for the preparation of high-energy-density film capacitors and has broad application prospects in electrical equipment operating under extreme conditions such as new energy vehicles, aerospace, and smart grids.

The invention belongs to the technical field of cables, and discloses a crosslinked polyethylene insulated power cable which sequentially comprises a cable core, a shielding layer, a lining layer and an outer sheath layer from inside to outside, the outer sheath layer is formed by extruding an outer sheath layer material and wrapping the outer side of the lining layer, the outer sheath layer material is made of high-density polyethylene and the like as base materials, and the shielding layer is made of polyethylene. The preparation method comprises the following steps: by taking magadiite as a main material and a functional additive and the like as auxiliary materials, carrying out an extrusion process, modifying the surface of the magadiite with a macromolecular modifier, and carrying out a crosslinking effect on the prepared functional additive and high-density polyethylene and the like under the action of an initiator, so that good interfacial compatibility is generated between the magadiite and a polyethylene matrix; and the three flame-retardant elements in the macromolecular modifier structure can cooperate with a physical barrier layer formed by magadiite, so that the purpose of greatly enhancing the flame-retardant property of the material by adding a small amount of flame-retardant elements is achieved.

The invention relates to the technical field of cross-linked polyethylene overhead insulated power cables, and discloses a water-tree-resistant modified insulation process for a cross-linked polyethylene overhead insulated cable, which comprises the following steps: mixing a cross-linked polyethylene matrix and a polar modifier to generate a modified melt, introducing the modified melt into an extrusion flow channel provided with a convergence section, and carrying out extrusion molding to obtain the cross-linked polyethylene overhead insulated power cable. The extrusion resistance generated by the change rate of the convergence angle of the convergence section is utilized to induce the polar modifier to generate a layered grain orientation structure in the matrix, the layered grain orientation structure is frozen through gradient cooling, the cross-linking reaction heat is utilized to drive the polar modifier and the matrix to generate molecular chain segment interpenetration, and an interface cross-linked network is formed on a spherocrystal interface. According to the method, localized distribution of the polar modifier is realized by utilizing geometric constraint of an extrusion flow field, a continuous physical barrier is constructed in a matrix spherocrystal gap, a migration path of water molecules is blocked, a micro space for inducing water tree initiation is eliminated, and the aging resistance and charge purity of a cable insulation system are synergistically enhanced.

The invention relates to a corrosion-resistant carbon-based composite material and a preparation method thereof, and belongs to the technical field of carbon-based composite materials. According to the invention, the modifier is self-made, the modifier and oxalic acid are used together for doping aniline to obtain doped polyaniline, the doped polyaniline, high-density polyethylene and carbon nanotubes are blended to obtain the corrosion-resistant carbon-based composite material, phosphate groups in the modifier realize flame retardance, and the corrosion resistance of the carbon-based composite material is greatly improved. The modifier can form a complex with a metal wire core, and a hydrophobic protection layer formed by the modifier and long-chain alkyl blocks invasion of water molecules and chemical media together, so that the material is endowed with excellent corrosion resistance, and in addition, an aromatic heterocyclic structure in the modifier is matched with the long-chain alkyl while improving the overall heat resistance of the material, so that the corrosion resistance of the material is improved. The polyaniline and the carbon nanotubes are uniformly dispersed in a polyethylene matrix, and the interface bonding property among the polyaniline, the carbon nanotubes and the polyethylene matrix is enhanced, so that the overall conductivity and corrosion resistance of the material are improved.

The invention belongs to the technical field of composite materials, and particularly relates to a wear-resistant anti-deformation modified polyethylene composite material for a carrier roller and a preparation method of the wear-resistant anti-deformation modified polyethylene composite material. The wear-resistant and deformation-resistant modified polyethylene composite material for the carrier roller is prepared from the following raw materials in parts by weight: 50 to 60 parts of HDPE (High-Density Polyethylene), 20 to 30 parts of UHMWPE (Ultra High Molecular Weight Polyethylene), 12 to 20 parts of reinforcing filler and 3 to 5 parts of PE-g-MAH (Polyethylene-g-Maleic Anhydride), the SCPP and MoS2 in the reinforcing filler form a core-shell structure through electrostatic adsorption, and the SCPP provides anti-deformation support for the composite material by virtue of an inorganic rigid framework, so that the problem that a polyethylene matrix is easy to bend is solved; the MoS2 is tightly coated on the surface of the SCPP, so that the friction coefficient is reduced, and the agglomeration of the MoS2 when the MoS2 is independently added is avoided; pE-g-MAH, hydroxyl on the surface of SCPP and oxygen-containing groups on the edge of MoS2 form chemical bonding, so that the interface bonding force between the core-shell filler and a non-polar polyethylene matrix is remarkably improved, and the interface defects are reduced.

The invention belongs to the technical field of flame-retardant composite materials, and particularly relates to a preparation method of an ultra-high molecular weight polyethylene flame-retardant composite material, which comprises the following steps: S1, preparing base material red phosphorus, namely grinding and crushing raw material coke for preparing the red phosphorus by using a grinding and crushing machine for later use; s2, adding the prepared red phosphorus, polyethylene resin, silicon dioxide, talcum powder and additives into a stirring barrel; s3, after stirring, pouring the mixture into a reaction kettle, placing the reaction kettle in a heat preservation chamber, after reaction, pouring the mixture into a stirrer, then pouring the mixture into a mold, cooling and taking the material to prepare the ultra-high molecular weight polyethylene flame-retardant composite material; the ultra-high molecular weight polyethylene has excellent impact resistance and wear resistance, low friction coefficient and good self-lubricating property, and some flame retardant additives are added into an ultra-high molecular weight polyethylene matrix, so that the ultra-high molecular weight polyethylene composite material has flame retardant property, and is wider in application range and more in application field.

The invention relates to a mining flame-retardant antistatic composite pipe, and relates to the technical field of pipes, the mining flame-retardant antistatic composite pipe is prepared from the following raw materials: ultra-high molecular weight polyethylene, antistatic flame-retardant master batch, thermoplastic polyurethane elastomer, high density polyethylene grafted maleic anhydride and nano silver ions; wherein the antistatic flame-retardant master batch is prepared from the following components: nano superconducting carbon black, high-density polyethylene grafted maleic anhydride, graphene, modified organic montmorillonite, ultrafine microencapsulated red phosphorus, nano magnesium hydroxide, a coupling agent, dicumyl peroxide, an antioxidant, white carbon black and macromolecular polyethylene wax, the thermoplastic polyurethane elastomer and the high-density polyethylene grafted maleic anhydride have a synergistic effect, and an interface bridging structure is constructed in an ultra-high molecular weight polyethylene matrix; a stable multi-phase composite structure is constructed, and the toughness, the interface bonding strength and the long-term use stability of the material are improved while the flame-retardant and antistatic functions are guaranteed.

The invention discloses a high-impact-resistance self-lubricating modified polyethylene blow-off pipe material and a preparation process thereof, and particularly relates to the technical field of polyethylene blow-off pipe materials, and the modified polyethylene blow-off pipe material is prepared by mixing the following components in proportion: 65%-75% of a polyethylene matrix, 6%-10% of an impact modifier, 8%-12% of an organic silicon modifier, 2%-4% of a functional additive, 3%-5% of an inorganic filler and 1% of a coloring agent. By introducing the efficient anti-impact modifier, a three-dimensional net-shaped reinforced structure is constructed, so that the impact strength is improved by more than three times compared with that of a traditional material, and even under complex and severe working conditions such as weight falling and violent impact of water flow, external force damage can be effectively resisted, and the integrity and stability of a pipeline are ensured; by introducing the organic silicon modifier, the self-lubricating effect is also excellent, and the organic silicon modifier and the polyethylene matrix form a nano-scale uniform dispersion system, so that the friction coefficient of the inner wall of the pipeline is greatly reduced.

The invention discloses a weather-resistant flame-retardant fireproof polyolefin cable material and a preparation method thereof, belongs to the technical field of cable material preparation, and is used for solving the technical problem that the flame retardant property and weather resistance of a cable material in the prior art need to be further improved. According to the invention, a phosphonitrile-DOPO / silica glassy state filler, a polyphenol-boric acid ester / iron coordination filler and a phosphorus-silicon / boric acid ester cross-linked network are synergistically constructed in a polyethylene matrix, so that an inorganic barrier, coordination stabilization and three-dimensional cross-linking triple system is formed; the structure can keep the flame-retardant layer of the material stable under the action of heat, force and environmental stress, wear loss is controllable, and performance degradation caused by aging is remarkably reduced, so that comprehensive improvement of flame retardance, wear resistance and weather resistance is realized.

The invention discloses an MXene / polyethylene flame-retardant composite material as well as a preparation method and application thereof, and relates to the technical field of flame-retardant polyethylene materials. The MXene / polyethylene flame-retardant composite material comprises high-density polyethylene resin and a modified MXene filler, and the mass fraction of the modified MXene filler in the composite material is 1-16%; the modified MXene filler is a phosphorus-containing ionic liquid modified MXene filler. According to the MXene / polyethylene flame-retardant composite material disclosed by the invention, a specific amount of phosphorus-containing ionic liquid modified MXene filler is added into a high-density polyethylene matrix, and the filler has good dispersity in a PE system and enhances interface interaction, so that a PE molecular chain is physically entangled and adsorbed with the surface of an MXene sheet layer, and therefore, the heat conductivity coefficient of the PE material is increased, the surface resistance is reduced, and the flame-retardant performance of the PE material is improved. And meanwhile, great loss of mechanical properties cannot be caused.

The application relates to the technical field of polyethylene, and particularly discloses a benzotriazole derivative grafted nanoparticle additive, a preparation method thereof and a polyethylene composite material. The method comprises the following steps: preparing inorganic nanoparticles modified by a silane coupling agent; sequentially performing end group epoxidation and hydroxyl protection on a benzotriazole derivative to obtain a hydroxyl-protected epoxy benzotriazole derivative; and finally, reacting the inorganic nanoparticles modified by the silane coupling agent with the hydroxyl-protected epoxy benzotriazole derivative to obtain the benzotriazole derivative grafted nanoparticle additive. The additive can effectively solve the problem that the nanoparticles are prone to agglomeration in a polyethylene matrix, thereby causing high film haze; when the additive is used for preparing the polyethylene composite material, the haze can be greatly reduced while maintaining high light transmittance, and the tensile strength and processing stability of the material can be improved. The application has controllable process and low cost, is suitable for the production of polyethylene products such as high-transparency packaging films, and has wide application prospect.