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968 results about "Polyacrylonitrile" patented technology
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Polyacrylonitrile (PAN), also known as polyvinyl cyanide and Creslan 61, is a synthetic, semicrystalline organic polymer resin, with the linear formula (C₃H₃N)ₙ. Though it is thermoplastic, it does not melt under normal conditions. It degrades before melting. It melts above 300 °C if the heating rates are 50 degrees per minute or above. Almost all PAN resins are copolymers made from mixtures of monomers with acrylonitrile as the main monomer. It is a versatile polymer used to produce large variety of products including ultra filtration membranes, hollow fibers for reverse osmosis, fibers for textiles, oxidized PAN fibers. PAN fibers are the chemical precursor of high-quality carbon fiber. PAN is first thermally oxidized in air at 230 °C to form an oxidized PAN fiber and then carbonized above 1000 °C in inert atmosphere to make carbon fibers found in a variety of both high-tech and common daily applications such as civil and military aircraft primary and secondary structures, missiles, solid propellant rocket motors, pressure vessels, fishing rods, tennis rackets and bicycle frames. It is a component repeat unit in several important copolymers, such as styrene-acrylonitrile (SAN) and acrylonitrile butadiene styrene (ABS) plastic.
Dry-jet wet-spinning ultra-high-performance polyacrylonitrile-based carbon fiber and preparation method thereof
The invention relates to a dry-jet wet-spinning ultra-high-performance polyacrylonitrile-based carbon fiber and a preparation method thereof, and belongs to the technical field of carbon fibers. A preparation method of dry-jet wet-spinning ultra-high-performance polyacrylonitrile-based carbon fiber comprises the following steps: S1, mixing acrylonitrile, a comonomer, a chain transfer agent, an initiator and a solvent, carrying out polymerization reaction through a solvent dropwise addition method, and preparing a spinning solution; wherein the comonomers comprise a first comonomer, a second comonomer and a third comonomer; s2, the spinning solution is subjected to solidification, water washing, water drawing, oiling, drying and steam drawing, and precursor fibers are obtained; s3, the precursor fiber is sequentially subjected to pre-oxidation, low-temperature carbonization, high-temperature carbonization, graphitization, surface treatment, sizing and drying, and the ultra-high-performance polyacrylonitrile-based carbon fiber is prepared. Wherein the pre-oxidation adopts four-stage pre-oxidation treatment. The strength and modulus of the carbon fiber can be effectively and synergistically optimized, and the carbon fiber with high strength and high modulus is prepared.
Owner:ZHONGFU SHENYING CARBON FIBER
Super-hydrophilic oil-water separation membrane, and preparation method and application thereof
The application belongs to the technical field of membrane separation materials, and discloses an ultrahydrophilic oil-water separation membrane, a preparation method and application thereof, and comprises the following steps: 2-(2-bromoisobutyryloxy)ethyl methacrylate monomers are prepared from 2-hydroxyethyl methacrylate and 2-bromoisobutyryl bromide, and a polymer with an atom transfer radical polymerization initiator is prepared through a free radical polymerization reaction; the polymer with the atom transfer radical polymerization initiator and polyacrylonitrile are dissolved into a solvent, and a PAN / P(AN-g-BIEM) blended membrane is prepared through a non-solvent induced phase separation method; and a hydrophilic polymer brush is grafted to the surface of the PAN / P(AN-g-BIEM) blended membrane to obtain the ultrahydrophilic oil-water separation membrane; the ultrahydrophilic oil-water separation membrane prepared by the application has a high separation flux, excellent oil-water separation efficiency and separation performance for different oil-in-water emulsions.
Owner:SHAANXI UNIV OF SCI & TECH
Platinum-zinc alloy supported nitrogen-doped porous multi-layer carbon material as well as preparation and application thereof
The invention relates to a platinum-zinc alloy supported nitrogen-doped porous multi-layer carbon material and preparation and application thereof, the carbon material takes a rod-like graded porous carbon nanomaterial as a carrier, and platinum-zinc alloy particles and zinc monatomic are jointly supported on the surface of the carrier; the preparation method comprises the following steps: S1, adding zinc acetate and hexadecyl trimethyl ammonium bromide into DMF (Dimethyl Formamide), carrying out ultrasonic treatment, adding into a polyacrylonitrile solution, and stirring; s2, performing electrostatic spinning on the obtained spinning precursor solution; s3, adding the obtained nanofiber into a zinc acetate dihydrate solution, then adding a dimethylimidazole solution, carrying out hydrothermal reaction, soaking the obtained product in a chloroplatinic acid methanol solution, and then carrying out freeze drying; and S4, heating carbonization is carried out under the protection of an inert atmosphere, then annealing and cooling are carried out, and the PtZn-Zn-N4-HPCNFs material is obtained. Compared with the prior art, the catalytic performance and the like in the reaction processes of oxygen reduction reaction (ORR), chlorine evolution reaction (CER) and the like can be effectively improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV
Method for determining pre-oxidation process parameters of polyacrylonitrile-based carbon fibers
The application relates to a method for determining pre-oxidation process parameters of polyacrylonitrile-based carbon fibers, and belongs to the technical field of carbon fibers. The method for determining pre-oxidation process parameters of polyacrylonitrile-based carbon fibers comprises first-stage pre-oxidation, the first-stage pre-oxidation temperature is determined based on DSC of the original fiber, and the first-stage pre-oxidation time is determined based on a cyclization index of the fiber at the first-stage pre-oxidation temperature. More reasonable pre-oxidation parameters can be determined, and polyacrylonitrile-based carbon fibers with high strength and high modulus can be prepared.
Owner:ZHONGFU SHENYING CARBON FIBER
Basalt fiber fireproof plate based on carbon-based protective layer and preparation method of basalt fiber fireproof plate
The invention relates to the technical field of fireproof plates, in particular to a basalt fiber fireproof plate based on a carbon-based protective layer and a preparation method of the basalt fiber fireproof plate, and the basalt fiber fireproof plate comprises the following raw materials in parts by weight: 90-100 parts of epoxy resin, 20-30 parts of a curing agent, 15-25 parts of modified basalt fibers, 10-20 parts of filler, 40-60 parts of a flame retardant, 1-2 parts of a coupling agent and 0.5-1 part of a defoaming agent. According to the preparation method, the basalt fiber is prepared through multi-step reaction of pretreatment, impregnation, pre-oxidation and carbonization, the basalt fiber is impregnated in treatment liquid with polyacrylonitrile as a precursor, polymer molecules are effectively attached, and the interface debonding phenomenon at high temperature is effectively inhibited through subsequent pre-oxidation and carbonization treatment under specific atmosphere and temperature programming; the excellent mechanical property stability of the material is kept in a long-term high-temperature environment.
Owner:CHINA FIBER AVIATION NEW MATERIALS (CHENGDE) CO LTD
Three-dimensional porous carbon encapsulated V2O5 carbon fiber electrode constructed by in-situ growth and preparation method and application thereof
The invention discloses a three-dimensional porous carbon encapsulated V2O5 carbon fiber electrode constructed by in-situ growth and a preparation method and application thereof, belongs to the technical field of aluminum ion battery positive electrode materials, and aims to solve the problems that the intercalation and deintercalation dynamics of AlCl4 in a polyacrylonitrile (Pan)-based carbon fiber is blocked due to disordered graphite structure, and the performance of the Pan-based carbon fiber is influenced. And the material cannot be used as an effective electrode material to be applied to an aluminum ion battery system. According to the preparation method, an in-situ growth technology is adopted, a three-dimensional porous carbon substrate is grown on the surface of carbon fiber, then an orthorhombic system vanadium pentoxide (V2O5) nano material which has high theoretical specific capacity and can realize large-current charging and discharging is packaged in the three-dimensional porous carbon substrate, and the V2O5-based carbon fiber electrode is prepared. According to the electrode, the electrostatic interaction between Al < 3 + > ions and crystal lattices is effectively relieved, the structural advantages of the carbon fibers and the energy storage performance of V2O5 are fully combined, the energy storage effect of the aluminum ion battery is remarkably improved, and a new effective scheme is provided for development of aluminum ion battery electrode materials.
Owner:BEIJING INST OF TECH
Solid electrolyte and battery
The invention provides a solid electrolyte and a battery. The solid electrolyte comprises polythionocarbamate, polyacrylonitrile and a lithium salt, wherein the polythionocarbamate comprises a thiocarbamate structural unit. In the solid electrolyte provided by the invention, amino groups in a thiocarbamate structural unit in the polythionocarbamate and cyano groups in polyacrylonitrile form hydrogen bonds, so that the polythionocarbamate and the cyano groups in the polyacrylonitrile have good compatibility, the crystallinity of the polyacrylonitrile can be effectively reduced by blending the polythionocarbamate and the polyacrylonitrile, and the flexibility of the solid electrolyte is improved; and meanwhile, the solid electrolyte has relatively good mechanical properties. Particularly, sulfur atoms in a thiocarbamate structural unit in the polythionocarbamate contribute to promoting lithium ion transmission and improving the ionic conductivity, and due to the interaction of hydrogen bonds formed by the polythionocarbamate and polyacrylonitrile, the transmission rate of lithium ions can be further improved.
Owner:SHENZHEN HAODYNE TECH CO LTD
High-temperature-resistant flame-retardant silicone rubber, preparation method thereof and cable
The invention relates to the technical field of silicone rubber, in particular to high-temperature-resistant flame-retardant silicone rubber, a preparation method thereof and a cable, the high-temperature-resistant flame-retardant silicone rubber comprises a gradient layer material composed of a surface layer material, a transition layer material and a core layer material, and the surface layer material comprises methyl vinyl silicone rubber, superfine furnace black, calcium stannate, polyacrylonitrile aerogel and a flame-retardant premix; the transition layer material comprises methyl vinyl silicone rubber, superfine furnace carbon black, spandex fibers, polyarylester, calcium stannate and a flame-retardant premix; the core layer material is prepared from methyl vinyl silicone rubber, superfine furnace black, aramid fiber, polyarylester, phthalonitrile resin and 2-mercaptobenzothiazole zinc salt; wherein the flame-retardant premix is prepared from hydroquinone bis (diphenyl) phosphate, phenyl ethyl aluminum phosphinate and zinc hypophosphite according to the weight ratio of (6 to 10): (2 to 4): (1 to 3); the problems that an existing material is prone to aging in an extreme environment, the flame retardant effect is poor, and the mechanical property is degraded are effectively solved.
Owner:GUANGDONG SHUANGLI CABLE
Preparation method of graphene carbon nanofiber film for oil-water separation
The invention provides a preparation method of a graphene carbon nanofiber film for oil-water separation, and relates to the field of oil-water separation membranes, and the preparation method comprises the following steps: mixing polyacrylonitrile powder and an N, N-dimethylformamide solution to obtain an electrostatic spinning solution; spinning through an electrostatic spinning machine to obtain a polyacrylonitrile fiber membrane; coating the polyacrylonitrile fiber film with the prefabricated graphene oxide dispersion liquid to obtain a graphene oxide / polyacrylonitrile composite film; carrying out pre-oxidation, activation and carbonization treatment on the composite film to obtain a graphene carbon nanofiber film; according to the method, the waste isostatic pressing graphite which is low in price and easy to obtain is adopted as the raw material, the ammonia activation means is combined, improvement is carried out on the basis of a Hummers method, graphene oxide is prepared, resource recycling is achieved, the isostatic pressing graphite waste generated in the production process is recycled and processed into a product with a high additional value, and therefore the purposes of reducing the production cost and saving resources are achieved.
Owner:SHANDONG JINLIT NEW MATERIAL CO LTD
Freeze-thaw-resistant stabilized soil vegetation slope protection material and preparation method thereof
The invention relates to preparation of stabilized soil, in particular to a freeze-thaw-resistant stabilized soil vegetation slope protection material and a preparation method thereof.The freeze-thaw-resistant stabilized soil vegetation slope protection material is prepared from, by mass, 100 parts of vegetation soil, 10 parts of cement, 8 parts of organic matter, 5 parts of greening additive and freeze-thaw-resistant additive, the freeze-thaw-resistant additive comprises polyacrylonitrile fibers, and the doping amount of the freeze-thaw-resistant additive is 0.25%-0.75% of the mass of the vegetation soil; the doping amount of the polyacrylonitrile fiber is 0.25%-0.75% of the mass of the plant-growing soil, the doping amount of the plastic steel fiber is 0.25%-0.75% of the mass of the plant-growing soil, the doping amount of the silicon powder is 1%-5% of the mass of the plant-growing soil, and the doping amount of the surfactant is 0.1%-0.3% of the mass of the plant-growing soil. The system can effectively inhibit crack initiation and expansion caused by freeze-thaw cycle. The strength loss rate after freezing and thawing is greatly reduced, and the freezing and thawing resistance is remarkably improved.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT
Iron-nickel diatomic fiber catalyst with precise and adjustable local structure as well as preparation method and application of iron-nickel diatomic fiber catalyst
The invention discloses an iron-nickel diatomic fiber catalyst with a precise and adjustable local structure and a preparation method and application thereof.The method is based on an organic small molecule coordination strategy and comprises the steps that ferric nitrate, nickel nitrate and dicyandiamide are dissolved in DMF according to a certain molar ratio, and a solution A is obtained; dispersing ZIF-8 nanoparticles in DMF (Dimethyl Formamide), and adding polyacrylonitrile to obtain a solution B; the solution A and the solution B are mixed to obtain a spinning solution, and a nanofiber membrane is obtained through electrostatic spinning; and carrying out pre-oxidation and high-temperature carbonization treatment on the nanofiber membrane to obtain the carbon nanofiber catalyst loaded with iron-nickel bimetallic atoms (metal diatoms, heterojunctions and alloys in which the metal diatoms and clusters coexist). The problem that the metal active site local structure of a metal diatom catalyst is difficult to accurately regulate and control is solved, and the prepared metal diatom heterojunction shows excellent ORR and OER bifunctional catalytic performance and cycling stability as a zinc-air battery positive electrode catalyst.
Owner:SUZHOU UNIV
All-solid oxide-polymer electrolyte membrane and preparation method and application thereof
The invention belongs to the technical field of development and manufacturing of solid-state electrolyte materials and solid-state lithium batteries, and particularly relates to an all-solid-state oxide-polymer electrolyte membrane as well as a preparation method and application thereof. The electrolyte membrane comprises a polymer matrix, a lithium salt, butanedinitrile, lithium lanthanum zirconium tantalum oxide and graphite phase carbon nitride, the polymer matrix, the lithium salt, the butanedinitrile, the lithium lanthanum zirconium tantalum oxide and the graphite phase carbon nitride are uniformly mixed to form a solid film; the polymer matrix is polyacrylonitrile and forms a framework of the electrolyte membrane; the lithium salt, the butanedinitrile, the lithium lanthanum zirconium tantalum oxide and the graphite phase carbon nitride are at least physically and uniformly dispersed in the polymer matrix. The electrolyte membrane can be prepared through the steps of slurry preparation, defoaming treatment, membrane forming processing, drying and curing and the like, and can be used in a solid-state lithium battery, so that the contact between the electrolyte membrane and an electrode interface is improved, side reaction is inhibited, the ion transmission efficiency and mechanical property are improved, the interface impedance is reduced, and the cycling stability and safety of the solid-state lithium battery are enhanced.
Owner:上海科源固能新能源科技有限公司
Tellurium-doped sulfurized polyacrylonitrile potassium storage negative electrode material and potassium ion total battery
PendingCN121583875ANegative electrodesElectrolyte accumulators manufactureElectrical batteryAcrylonitrile
The invention discloses a tellurium-doped sulfurized polyacrylonitrile potassium storage negative electrode material and a potassium ion total battery, and belongs to the field of potassium ion batteries. In order to solve the technical problems of low sulfur utilization rate and poor rate capability when sulfurized polyacrylonitrile is used as a potassium storage negative electrode material, the tellurium-doped sulfurized polyacrylonitrile (Te-SPAN) material with high performance is synthesized in a tellurium doping manner. In the tellurium-doped sulfurized polyacrylonitrile (Te-SPAN), the content of tellurium is lower than 5%, the content of sulfur is 33%-39%, and the content of carbon is 59%-62%. When the Te-SPAN is used as a potassium storage negative electrode material, the Te-SPAN shows high potassium storage capacity, excellent rate capability and cycling stability. In addition, the potassium ion total battery assembled based on the composite negative electrode and the low-defect manganese potassium hexacyanoferrate positive electrode also shows very excellent electrochemical performance.
Owner:NORTH CHINA ELECTRIC POWER UNIV
Polymer-based anti-crack concrete and preparation method thereof
ActiveCN121850489Ahigh tensile strengthImprove toughnessSolid waste managementPolymer scienceSodium metasilicate
The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.
Owner:CHENGDU JIAXIN TECH
High-strength high-modulus polyacrylonitrile carbon fiber precursor, carbon fiber and preparation method thereof
The invention relates to a high-strength and high-modulus polyacrylonitrile carbon fiber precursor, a carbon fiber and a preparation method thereof, and belongs to the field of polyacrylonitrile-based carbon fiber preparation. A wet spinning process is adopted, the method comprises the solidification step of at least two solidification baths, and n spraying devices are arranged between every two adjacent solidification baths in the solidification process to spray solutions to bath separation fibers; the concentrations Cg (i-1) and Cgi of the polar organic solvent in two adjacent coagulating bath solutions and the concentration C1-Cn of the polar organic solvent in the solution of the spraying device between the two adjacent coagulating bath solutions meet the following relational expression: Cg (i-1) is greater than or equal to C1gt; c2gt; C2gt; gt,... gt; cn > = Cgi, i > = 2, and n > = 3. The method mainly solves the problems that in the prior art, the breaking elongation coefficient of protofilaments (monofilaments) is large, and the number of broken filaments is large in the solidification process. According to the technical scheme, the problems are well solved, and the method can be used for preparing high-performance carbon fibers.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Composite electrolyte for high-voltage solid-state lithium battery and preparation method
PendingCN121172234ASecondary cellsElectrolyte immobilisation/gelificationSolid state electrolytePolyethylene oxide
The invention relates to a high-voltage polyoxyethylene (PEO)-based solid electrolyte and a preparation method thereof, and belongs to the technical field of solid-state battery materials. The electrolyte is composed of a polymer substrate, an inorganic filler, a cosolvent and a lithium salt, the polymer substrate is a PEO-polyacrylonitrile (PAN) composite substrate; the inorganic filler is lithium titanium aluminum phosphate LATP, and the cosolvent is fluoroethylene carbonate FEC; the lithium salt is lithium bis (trifluoromethanesulfonic acid) imide LiTFSI and lithium difluoro (oxalato) borate LiDFOB; the dispersing agent is acetonitrile ACN. The method has the advantages that PEO and FEC are complexed to form a new structure, and room-temperature efficient operation of a single-salt (LiTFSI) system is realized; and meanwhile, LiDFOB is cooperatively introduced to construct a stable passivation layer on a positive electrode interface, FEC synchronously induces to generate LiF-rich stable SEI on a lithium negative electrode, and the interface compatibility and electrochemical stability of the electrolyte to a high-voltage electrode are remarkably improved.
Owner:NANJING FORESTRY UNIV
Water treatment filtering material and preparation method thereof
The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of filtering materials. When the water treatment filtering material is prepared, firstly, acrylonitrile, itaconic acid and ethylene 2-(methacryloyloxy) ethyl phosphate are copolymerized to prepare copolymerized modified polyacrylonitrile; the preparation method comprises the following steps: carrying out hydrothermal reaction on a copper source and tetrabutyl titanate, and calcining to obtain copper-doped nano titanium dioxide; the copper-doped nano titanium dioxide and KH-550 are subjected to a reaction, and modified nano titanium dioxide is prepared; carrying out electrostatic spinning on the copolymerized modified polyacrylonitrile, and carrying out nano-spray loading on the modified nano titanium dioxide to prepare a modified polyacrylonitrile fiber membrane; and reacting the modified polyacrylonitrile fiber membrane in a covalent organic framework growth solution to prepare the water treatment filtering material. The prepared water treatment filtering material has the advantages of being antibacterial, anti-pollution, high in filtering efficiency and long in service life.
Owner:HOT GRP CO LTD
Efficient fireproof aerogel steel structure coating and preparation method thereof
The invention provides an efficient fireproof aerogel steel structure coating and a preparation method thereof, and belongs to the technical field of fireproof coatings. The silicified polyacrylonitrile fiber three-dimensional network is constructed by combining pre-oxidation of the polyacrylonitrile fiber with vapor deposition and carbonization treatment, and excellent mechanical properties and heat-resistant stability are achieved; the light, high-strength, heat-resistant and flame-retardant composite hybrid aerogel is formed through the synergistic reaction of polyacrylonitrile fibers and tetraethoxysilane and the complexing action of boric acid, and the flame retardance and the structural stability are further enhanced through boric acid derivatives and two-step carbonization treatment; sodium lignin sulfonate and a melamine-phytic acid system are self-assembled, pores are filled, the free radical quenching efficiency is improved, and meanwhile, the toughness and impact resistance of the coating are enhanced through a supramolecular structure; the outer layer carbon-silicon aerogel and the inner layer expansion coating form double barrier, and the fire resistance and flame retardance of the coating are remarkably improved.
Owner:BEIJING PAINUOMENG ENERGY TECH +2
Monatomic iron and ferric oxide cluster synergistic graded porous hollow carbon fiber catalyst as well as preparation method and application thereof
The invention belongs to the technical field of electrocatalytic nitrate reduction catalysts, and particularly relates to a graded porous hollow carbon fiber catalyst with synergistic monatomic iron and ferric oxide clusters as well as a preparation method and application of the graded porous hollow carbon fiber catalyst. The preparation method specifically comprises the following steps: stirring polyacrylonitrile and polymethyl methacrylate in an organic solvent to obtain a spinning precursor solution; the preparation method comprises the following steps: taking ferrous sulfate heptahydrate and 1, 10-phenanthroline as ligands, and stirring in an organic solvent to obtain a metal organic ligand; the preparation method comprises the following steps: stirring a spinning precursor solution and a metal organic ligand, obtaining a metal precursor-loaded composite fiber through an electrostatic spinning technology, and then carrying out pre-oxidation and high-temperature pyrolysis to obtain the composite fiber. The prepared carbon fiber has good conductivity and a unique hollow hierarchical porous structure, transmission of reactants is greatly promoted while more active sites are exposed, the carbon fiber serves as a monatomic synergistic cluster catalyst carrier, rapid transmission of electrons is facilitated, and the electro-catalysis efficiency is effectively improved.
Owner:CHINA UNIV OF MINING & TECH (BEIJING) +1
MXene / C electrode material based on PAN carbonization and preparation method thereof
According to the prepared MXene / C electrode material based on PAN carbonization, a nitrogen-doped carbon layer generated through polyacrylonitrile (PAN) in-situ carbonization serves as a supporting spacer to be inserted between MXene nanosheet layers, the MXene nanosheet layers are tightly bridged, the interlayer spacing of MXene is effectively enlarged, re-stacking of nanosheets is inhibited, and in the carbonization process, the MXene / C electrode material can be used for preparing the MXene / C electrode material based on PAN carbonization. Abundant mesopores and fissure holes are generated in the composite material by introducing and decomposing a sacrificial template (PMMA nanosphere), and a three-dimensional through ion transmission channel is constructed; the nitrogen-doped carbon layer not only serves as a supporting spacer to be inserted between MXene nanosheet layers, but also coats the surfaces of the MXene nanosheets,-F end groups on the surfaces of the MXene nanosheets are weakened, and C-O (H) and C-N functional groups are enriched, so that the interface wettability, the conductivity and the anti-oxidation stability of the material are improved, and the material can be widely applied to the technical field of electrochemical energy storage materials.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Light-color warm-keeping fiber, preparation method and application of light-color warm-keeping fiber to fabric
ActiveCN121538751AElectroconductive/antistatic filament manufactureMonocomponent synthetic polymer artificial filamentPolymer scienceNano zinc oxide
The invention relates to the technical field of fibers, and discloses a light-color warm-keeping fiber, a preparation method and application of the light-color warm-keeping fiber to fabrics. According to the invention, polyacrylonitrile modified silicon dioxide aerogel is used as a heat-insulating functional filler, cationic modified nano zinc oxide is used as an antistatic agent and an antibacterial agent, and the light-colored polyacrylonitrile fiber is prepared by adopting a melt spinning method and has good heat-insulating and warm-keeping properties; and the cationic inorganic-organic composite antibacterial antistatic agent is introduced, so that the antibacterial and antistatic properties of the fiber are optimized.
Owner:BOSIDENG DOWN WEAR LTD +1
Gel electrolyte, lithium ion battery and preparation method thereof
The invention discloses a gel electrolyte, a lithium ion battery and a preparation method of the lithium ion battery, and belongs to the technical field of lithium batteries. The invention discloses a gel electrolyte, which comprises a polymer main matrix, an initiator, a lithium salt, an organic solvent, a solid electrolyte and a coalescing agent, and the polymer main matrix comprises poly (vinylidene fluoride-hexafluoropropylene)-polyacrylonitrile-maleic anhydride-ethylene carbonate. The stability of the gel electrolyte is effectively improved.
Owner:HUIZHOU TOPBAND ELECTRICAL TECH CO LTD
Vulcanized polyacrylonitrile-based electrode and preparation method and application thereof
The invention relates to the field of all-vanadium redox flow batteries, in particular to a sulfurized polyacrylonitrile-based electrode, a preparation method thereof and application of the sulfurized polyacrylonitrile-based electrode as an all-vanadium redox flow battery negative electrode material. The invention provides a negative electrode of an all-vanadium redox flow battery, which takes a carbon felt electrode as a matrix and is loaded with sulfurized polyacrylonitrile. The sulfurized polyacrylonitrile is used as a negative electrode catalytic material for the all-vanadium redox flow battery, so that the electrocatalytic activity of a negative electrode reaction can be improved, the reaction kinetics is accelerated, and the battery performance is improved. Meanwhile, the sulfurized polyacrylonitrile and the negative electrode matrix carbon felt have the same molecular skeleton, so that the sulfurized polyacrylonitrile can grow on the surface of the carbon felt in situ, the adhesive force of the catalyst sulfurized polyacrylonitrile and the carbon felt is improved, and the cycling stability of the all-vanadium redox flow battery is further improved. In addition, the power density of the all-vanadium redox flow battery under high current density can be improved by using the sulfurized polyacrylonitrile as the negative electrode catalyst.
Owner:CHINA NAT PETROLEUM CORP +1
Novel acrylonitrile copolymer flame-retardant material and preparation method thereof
The invention discloses a novel acrylonitrile copolymer flame-retardant material and a preparation method thereof, and relates to the technical field of functionalized polyacrylonitrile. According to the invention, acrylonitrile and a specific alkenyl silicon-containing monomer are used as copolymerization components, and free radical copolymerization reaction is carried out in an initiator and organic solvent system to prepare the flame-retardant material. The selected alkenyl silicon-containing monomer has both unsaturated double bonds and silicon-containing groups, and can be efficiently copolymerized with acrylonitrile and graft the silicon-containing groups to polymer chain segments, so that the material is endowed with excellent thermal stability, flame retardance and hydrophobic property, and the defects of flammability and strong hydrophilicity of a pure acrylonitrile material are overcome. The preparation process is simple and mild, reaction conditions are easy to control, complex equipment is not needed, industrial production is facilitated, and the copolymer is balanced in comprehensive performance, can be widely applied to the fields of clothing spinning, industrial building, special equipment and the like, and has outstanding practical value and market prospect.
Owner:EAST CHINA UNIV OF SCI & TECH
Silver-loaded antibacterial polyacrylonitrile-based activated carbon fiber and method for preparing the same
The application provides a silver-loaded antibacterial polyacrylonitrile-based activated carbon fiber and a preparation method thereof, and belongs to the technical field of carbon fibers, and comprises the following steps: S1, chitosan solution preparation; S2, silver nitrate-chitosan solution preparation; S3, preparation of polyacrylonitrile fiber loaded with silver ions-chitosan on the surface; S4, pre-oxidation; S5, treatment of the pre-oxidized fiber; S6, carbonization and activation; and S7, drying.The silver ions-chitosan solution is used to uniformly load silver ions on the surface of the polyacrylonitrile fiber, the concentration of the silver ions-chitosan solution is 0.5-5 wt%, the surface pore size and distribution of the prepared activated carbon fiber can be controlled by the concentration of the acid solution, and the activated carbon fiber is rich in pore size and uniform in pore distribution, and the specific surface area is 800-1600 m 2 / g.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Thin-wall high-thermal-conductivity high-strength C / C composite material fin as well as preparation method and application thereof
PendingCN121179812ACosmonautic environmental control arrangementLamination ancillary operationsMaterials preparationCarbon fibers
The invention discloses a thin-wall high-thermal-conductivity high-strength C / C composite material fin as well as a preparation method and application thereof, and relates to the technical field of composite material preparation. The fin is of a multi-layer structure and comprises a core layer and multi-layer structure fixing layers which are sequentially arranged on the top face and the bottom face of the core layer in a stacked mode. The fin is prepared by laying the prefabricated layer of the core layer and the prefabricated layer of the structure fixing layer according to a multi-layer structure and then performing pressing, densification and heat treatment; wherein the prefabricated layer of the core layer is orthogonal fiber cloth woven by 1k polyacrylonitrile-based carbon fibers; the prefabricated layer of each structure fixing layer is made of non-woven cloth woven by mesophase pitch-based carbon fibers. According to the manufacturing method, a sandwich type non-periodic mixed layering structure is constructed, so that the yield of the machined thin-wall C / C fins is increased, and efficient manufacturing of the thin-wall high-heat-conductivity high-strength C / C composite material fins is achieved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Secondary particle composite Group IVA materials
Exemplary secondary particles may include a porous polymer matrix comprising polyacrylonitrile (PAN) and polypyrrole (PPy), and a plurality of submicron-sized primary particles dispersed in the porous polymer matrix. The plurality of submicron-sized primary particles may comprise at least one of: carbon (C), silicon (Si), germanium (Ge), tin (Sn), or an alloy of a Group IVA element.
Owner:PARACLETE ENERGY INC
Three-dimensional polymer modified intermediate layer for lithium ion solid-state battery and preparation method of three-dimensional polymer modified intermediate layer
ActiveCN121618063AMonocomponent synthetic polymer artificial filamentLi-accumulatorsPolymer modifiedElectrical battery
The invention relates to the technical field of lithium-ion solid-state batteries, in particular to a three-dimensional polymer modified intermediate layer for a lithium-ion solid-state battery and a preparation method of the three-dimensional polymer modified intermediate layer, and the preparation method comprises the following steps: adding polyacrylonitrile into N, N-dimethylformamide, and stirring until the polyacrylonitrile is completely dissolved; and then adding the modified polyamide acid-phosphonate copolymer, continuously stirring to obtain an electrostatic spinning precursor solution, and carrying out electrostatic spinning on the electrostatic spinning precursor solution to obtain the composite nanofiber membrane. According to the invention, the indium-containing heterocyclic modified diamine is used as a core monomer of the polyamide acid-phosphonate copolymer, the lithium deposition nucleation overpotential can be reduced by the excellent lithium-loving activity of the indium-containing heterocyclic modified diamine, the lithium is enabled to be compact and free of dendritic crystal deposition, and the indium-containing heterocyclic group is uniformly dispersed in a three-dimensional framework through a cross-linked network of the modified polyamide acid-phosphonate copolymer, so that the performance of the polymer is improved. The contact interface of the intermediate layer and the lithium metal forms a global uniform lithium-loving site, and concentrated deposition of lithium atoms caused by local lithium-loving activity difference is avoided.
Owner:INNER MONGOLIA UNIV OF SCI & TECH
Single-layer Janus fiber membrane with pore and wettability double gradients and one-step electrospinning preparation method of single-layer Janus fiber membrane
PendingCN120989832AElectro-spinningMonocomponent synthetic polymer artificial filamentPolymer scienceSpinning
The invention discloses a single-layer Janus fiber membrane with pore and wettability double gradients and a one-step electrospinning preparation method of the single-layer Janus fiber membrane, and belongs to the technical field of electrostatic spinning functional fiber materials. According to the method disclosed by the invention, polyacrylonitrile (PAN) has weak hydrophilicity, and hydrophobic modification and hydrophilic modification of the PAN fiber membrane can be realized by respectively adding fluorinated titanium dioxide (F-TiO2) particles and tannic acid (TA); gradient regulation and control of pores are realized by regulating and controlling the concentration of the PAN spinning solution. The method comprises the following steps: S1, mixing F-TiO2 particles with PAN to obtain a spinning solution A; s2, mixing TA and PAN to obtain a spinning solution B; s3, the spinning solution A and the spinning solution B are sequentially sucked into the same injector, and a pre-spinning solution C is obtained; and S4, preparing the single-layer fiber membrane through electrostatic spinning. The fiber membrane has a pore / wettability double-gradient structure, shows excellent one-way moisture conduction performance, and has wide application prospects in the fields of personal protection masks, outdoor sportswear and the like.
Owner:CHANGZHOU UNIV +1
Electrode composite
A lithium-ion battery component with an electrode includes a current collector and a silicon-based active layer. The active layer includes a polyacrylonitrile lattice structure with continuous carbon domains. Silicon particles are distributed within the vacancies of the polyacrylonitrile lattice, which is configured to confine the silicon particles during the volume expansion and contraction that occurs during charge cycling.
Owner:FORD GLOBAL TECH LLC