27 results about "Poly(p-phenylene)" patented technology

Provided is a speaker diaphragm that can uniformly increase rigidity throughout the entire area. A speaker diaphragm 1 of the present invention includes a base material having a resin matrix 2 with a thermoplastic resin as a main component and fibers 3 dispersed in the resin matrix 2, the fibers 3 being poly-p-phenylene benzobisoxazole fibers, the average length of the fibers 3 being 0.5 mm or more and 3.0 mm or less, and the content of the fibers in the base material being 3 mass% or more and 15 mass% or less.

The present application relates to polyether ether ketone composite material technical field, disclose a kind of polyether ether ketone-based high temperature resistant composite material and its preparation method and application.Polyether ether ketone-based high temperature resistant composite material, raw material is by weight parts, including:polyether ether ketone 48~66 parts, modified polyarylate ether ketone 10~20 parts, composite filler 24~32 parts;The composite filler includes carbon fiber and poly-p-phenylene benzobisoxazole fiber.Preparation method: the formula amount of modified polyarylate ether ketone is dissolved in dipolar aprotic solvent, formula amount of carbon fiber is added and soaked, after removing solvent, get the sample of sizing;Formula amount of polyether ether ketone, prepared sizing sample and poly-p-phenylene benzobisoxazole fiber are mixed uniformly after heat pressing molding, obtain polyether ether ketone-based high temperature resistant composite material.The modified polyarylate ether ketone is applied to military, energy power, ship and submarine field.The polyether ether ketone-based high temperature resistant composite material provided by the present application improves the interfacial properties of polyether ether ketone and poly-p-phenylene benzobisoxazole fiber, polyether ether ketone and carbon fiber, thereby improving the tensile strength and bending strength of polyether ether ketone-based high temperature resistant composite material.

The present invention provides a secondary barrier for liquefied gas storage tank, characterized by comprising: a blocking layer containing (a) metal or (b) one or more polymers selected from the group consisting of polyethylene, polyethylene terephthalate, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, and nylon; and a fiber layer laminated on both sides of the blocking layer, containing one or more fibers selected from the group consisting of glass fiber, polyethylene fiber, poly-p-phenylene benzobisoxazole fiber (PBO), aramid fiber, and carbon fiber, the fiber layer being fixed by an adhesive layer suitable for surface properties.

The application belongs to the field of polyester base cloth materials, and provides a high tensile strength polyester base cloth and a preparation method thereof, and constructs a modified polyester which can maintain excellent mechanical properties under high stress conditions. First, polyethylene glycol monomethyl ether is used to react with maleic anhydride to introduce flexible polyether chain segments and unsaturated double bond structures, and then free radical grafting of acrylic acid and ring-opening reaction of epichlorohydrin are used to introduce functional groups, so that the flexible chain segments have reactivity with polyester chains and other components, thereby enhancing the intermolecular compatibility and binding force in subsequent polymerization. In the preparation process of the polyester matrix, modified liquid crystal polyester and modified poly-p-phenylene benzobisoxazole are added to improve the tensile strength of the material through the rigid molecular chain structure thereof, and meanwhile, the flexible chain segments of the modified polyethylene glycol monomethyl ether and polytetrahydrofuran ether glycol effectively disperse internal stress, further improving the overall mechanical properties and structural stability of the material.

The invention relates to the technical field of air filtration, in particular to bio-based flame-retardant air filter paper and a preparation method thereof. The bio-based flame-retardant air filter paper comprises: base paper; the flame-retardant adhesive layer is compounded on the surface of the base paper; the base paper is prepared from raw materials including poly (p-phenylene benzobisoxazole) fibers, broadleaf wood fibers and coniferous wood fibers; the flame-retardant adhesive layer is prepared from a flame-retardant adhesive solution; the flame-retardant glue solution comprises styrene-butadiene latex, a flame retardant, carboxymethyl cellulose, a lubricant, potassium zirconium carbonate and water; the flame retardant is prepared from raw materials including a phytic acid solution and anhydrous calcium chloride. According to the flame-retardant adhesive layer provided by the invention, specific flame retardants phytic acid and anhydrous calcium chloride are adopted and matched with other specific components, so that good interaction can be realized, the flame retardance of the flame-retardant adhesive layer can be effectively improved, and the obtained filter paper is relatively large in dust holding capacity, relatively excellent in filtering performance and bursting resistance and relatively long in service life; no halogen hydride gas is generated during combustion, so that the environment-friendly effect is achieved.

The invention relates to the technical field of sodium batteries, in particular to a modified sodium vanadium phosphate positive electrode material and a preparation method and application thereof. The anion-doped sodium vanadium phosphate / carbon positive electrode material is constructed by introducing carbon and various anion-doped elements into the sodium vanadium phosphate positive electrode material, and the surface of the anion-doped sodium vanadium phosphate / carbon positive electrode material is further coated with poly-p-phenylene ethylene, so that a coating layer with a compact and stable structure is formed; the ionic conductivity, electronic conductivity and structural stability of the positive electrode material are enhanced, dissolution of vanadium metal in sodium vanadium phosphate and side reaction between the positive electrode and electrolyte can be inhibited, and the positive electrode material has excellent cycle performance and rate capability.

The invention relates to an intrinsic conductive solid aluminum electrolytic capacitor diaphragm and a preparation method thereof, and belongs to the technical field of aluminum electrolytic capacitors. The diaphragm is prepared from 50-80wt% of high-temperature-resistant fibrillated fibers, 10-30wt% of conductive fibers and 10-20wt% of adhesive fibers through a wet papermaking process. The high-temperature-resistant fibrillated fibers are selected from aramid fibers, polyacrylonitrile fibers or poly-p-phenylene benzobisoxazole (PBO) fibers, and are subjected to pulping treatment to form a micro-nano three-dimensional network skeleton, so that the diaphragm is endowed with excellent heat resistance and structural stability; the conductive fibers are selected from aluminum fibers, copper fibers, stainless steel fibers, carbon fibers, graphene modified fibers, polyacetylene fibers, polyaniline fibers, polypyrrole fibers and polythiophene fibers, a continuous conductive path is constructed, and the resistance of the diaphragm body is remarkably reduced; the bonding fibers are low-melting-point hot melting fibers, bonding nodes are formed through hot pressing, and the interlayer bonding force is enhanced. The diaphragm is suitable for solid-state capacitors in high-frequency and high-temperature scenes.

The present invention relates to a transmission belt comprising a compressed rubber layer. The compressed rubber layer comprises a crosslinked rubber composition, and the crosslinked rubber composition includes a rubber component and short fibers. The rubber component includes chloroprene rubber, and the short fibers include poly(para-phenylene benzobisoxazole)-based short fibers and aramid short fibers. The 4% bending modulus in a direction orthogonal to the orientation direction of the short fibers in the crosslinked rubber composition is 5 MPa or greater, and the 4% bending modulus in a direction parallel to the orientation direction of the short fibers in the crosslinked rubber composition is 2.5 MPa or less.

This invention discloses a method for preparing PBO-based multi-thermal-response sensing fibers and their application in high-temperature early warning. The preparation includes the following steps: S1, preparation of PNF dispersion; S2, preparation of PEDOT:PSS powder; S3, preparation of PEDOT:PSS@Te NWs; S4, preparation of Cs2NaInCl6:Mn 2+ Sb 3+ Preparation of crystals; S5, preparation of sensing fibers. This invention uses poly(p-phenylenebenzodioxazole) (PBO) fiber as the substrate and combines a thermoelectric and thermochromic dual-modal synergistic sensing mechanism, which has excellent flame retardancy, high mechanical strength, ultra-sensitive thermal response, and wide-range visual temperature detection performance.

This invention relates to the field of materials technology, and provides a composite insulating paper and its preparation method. The method includes: functionalizing BNNS with polydopamine (PDA) to obtain BNNS@PDA; preparing gallium-indium alloy (LM) using gallium and indium as raw materials; dispersing the gallium-indium alloy LM in polyvinyl alcohol (PVA) by electrospinning to obtain PVA@LM nanofibers; adding poly(p-phenylenebenzodioxazole) (PBO) fibers, BNNS@PDA, and PVA@LM nanofibers to deionized water and shearing to obtain a composite solution; spraying the composite solution onto a substrate to form a thin film; and immersing the thin film in a solution containing C8H... 10 After being immersed in an O8 solution, the material is removed and subjected to a curing and cross-linking reaction to obtain a cured cross-linked film. The cured cross-linked film is then cooled, rinsed, and dried to obtain rough paper. The rough paper is then hot-pressed to obtain composite insulating paper. Compared with existing insulating paper, the composite insulating paper provided by this invention has significantly improved thermal conductivity. The method provided by this invention is simple and low in cost.

The invention discloses a colored poly (p-phenylene benzobisoxazole) fiber and a preparation method and system thereof, and belongs to the field of preparation of high-performance fiber materials.A PBO initial polymer, a colored PBO initial polymer, a colored PBO prepolymer and a colored PBO polymer are prepared in stages through the deconstruction PBO polymerization process, and the colored PBO initial polymer, the colored PBO prepolymer and the colored PBO polymer are prepared on the basis of accurate temperature regulation and control and online viscosity monitoring technologies. According to the present invention, the optimal control of the material viscosity at each stage is achieved, the pigment is dispersed in the low-viscosity PBO primary polymer system, and the viscosity change at each stage in the polymerization process is cooperatively regulated so as to effectively prolong the mixing window period of the PBO polymer and the pigment, such that the efficient and uniform dispersion and the stable dyeing of the pigment are achieved.

The invention provides a high-temperature-resistant high-strength low-wear self-lubricating fabric liner composite material, a preparation method thereof and a friction pair. The high-temperature-resistant high-strength low-wear self-lubricating fabric liner composite material comprises a blended fabric and thermosetting resin serving as a binder, wherein the blended fabric is obtained by weaving lubricating fibers and reinforcing fibers, the lubricating fibers comprise polytetrafluoroethylene fibers, and the reinforcing fibers comprise poly (p-phenylene benzobisoxazole) fibers; the thermosetting resin comprises polyimide resin. According to the self-lubricating fabric liner composite material provided by the invention, high-modulus, high-strength and high-temperature-resistant poly (p-phenylene benzobisoxazole) fibers and polytetrafluoroethylene fibers with excellent lubricating performance are interwoven, and polyimide with outstanding mechanical properties, heat resistance and wear resistance is adopted as a binder. Under the synergistic effect of the three components, the obtained self-lubricating fabric liner material has excellent antifriction and wear-resisting properties and can be suitable for the working condition at the high temperature of 300 DEG C.

This utility model discloses a double-sheathed antistatic and tensile-resistant rail transit control cable. It relates to the field of cable technology and employs a control cable core and a tensile layer. The control cable core is configured with five groups, and a flame-retardant filling layer is provided on the outside of each core. A central tensile-resistant filling rope is provided in the center of the flame-retardant filling layer. This utility model increases the tensile strength of the entire control cable by providing a central tensile-resistant filling rope made of poly(p-phenylene benzodioxazole) fiber material. The flame-retardant filling layer made of glass fiber material, which has excellent high-temperature resistance and fire resistance, improves the flame-retardant effect of the control cable. The use of a first antistatic layer and a second antistatic layer, the first being made of polyvinyl chloride (PVC) and the second being made of conductive fiber material, significantly enhances the antistatic effect of the control cable.

A speaker diaphragm includes a substrate. The substrate includes a resin matrix and fibers. The resin matrix contains a thermoplastic resin as a main component. The fibers are dispersed in the resin matrix. The fibers are polyparaphenylenebenzobisoxazol fibers. An average length of the fibers is 0.5 mm or more and 3.0 mm or less.

The application provides a multilayer fiber reinforced composite material and a preparation method thereof. The multilayer fiber reinforced composite material is prepared by hot pressing and curing a prepreg stack, and the prepreg stack comprises: an alumina fiber plain cloth prepreg located at the center, and high-modulus poly-p-phenylene benzobisoxazole fiber unidirectional cloth prepregs, alumina fiber unidirectional cloth prepregs and high-strength glass fiber plain cloth prepregs symmetrically distributed on both sides of the alumina fiber plain cloth prepreg from inside to outside. The alumina fiber plain cloth prepreg, the high-modulus poly-p-phenylene benzobisoxazole fiber unidirectional cloth prepreg, the alumina fiber unidirectional cloth prepreg and the high-strength glass fiber plain cloth prepreg are all combined by corresponding fiber cloth and epoxy resin adhesive film through hot pressing. The multilayer fiber reinforced composite material is super-thin, has strong impact resistance and puncture resistance, and is environmentally friendly in process.

The invention discloses poly (p-phenylenebenzobisoxazole) (PBO) and para-aramid fiber composite meta-aramid paper and a preparation method thereof in the field of chemical papermaking, the composite meta-aramid paper takes meta-aramid fibers as a main body, and the para-aramid fibers and poly (p-phenylenebenzobisoxazole) fibers are added to form a ternary composite system; and two interface modification compounds, namely phosphorus and nitrogen containing flame-retardant epoxy functionalized cage type silsesquioxane and hyperbranched polyaryletherketone-benzoxazole, are innovatively introduced. The preparation process comprises the key steps of fiber pretreatment, slurry preparation, wet papermaking, hot-pressing compounding and the like. By accurately controlling fiber ratio, slurry concentration and hot pressing process parameters, advantage complementation and interface strengthening of the three high-performance fibers are realized. The obtained composite material has excellent mechanical strength, high temperature resistance, electrical insulation property and flame retardant property, keeps good flexibility and processability, and is suitable for the fields of high-end electrical insulation, aerospace, protective materials and the like.

Provided are a molded body, a composite material for producing the molded body, and a method for producing the composite material. The molded body is formed from a composition containing a resin and fibers (X) containing poly (p-phenylene benzobisoxazole), and the proportion of the fibers (X) is 50% by mass or more with respect to 100% by mass of the poly (p-phenylene benzobisoxazole) contained in the composition.

The invention discloses a police protective material and a preparation method thereof. The material is divided into a double-layer structure including a puncture-resistant surface layer and a composite energy-absorbing bottom layer in the impact direction. The puncture-resistant surface layer is composed of poly (p-phenylene benzobisoxazole) fibers, aramid fibers and UHMWPE fibers, the PBO fibers are densely woven in a hexagonal honeycomb shape, and the aramid fibers and the UHMWPE fibers are wound through a double-helix structure. The composite energy-absorbing bottom layer is formed by filling polyurethane foam into an aluminum alloy honeycomb framework subjected to micro-arc oxidation treatment and is bonded with the puncture-resistant surface layer in a hot-pressing mode through a copolyamide hot melt adhesive film, and the total thickness is only 10-15 mm. The preparation method comprises the steps of fiber double-helix winding, honeycomb weaving, micro-arc oxidation, polyurethane injection molding and the like. Through the synergistic effect of honeycomb rigid puncture resistance, spiral friction energy absorption and foam plastic deformation, the thickness of the material is reduced by 40% compared with that of a traditional product under the same protection capacity, and the material has the advantages of light weight and high protection performance and is suitable for police equipment such as body armor and the like.

The novel plastic functional wooden dummy comprises a wooden dummy body and a balance weight base, and the balance weight base is fixedly installed at the bottom of the wooden dummy body, is formed by welding steel plates and is filled with balance weights; the wood pile body further comprises a pile body core framework which is made of high-density polyethylene. The buffer layer covers the exterior of the pile body core framework and is made of a low-density polyethylene resin foaming body; the surface of the buffer layer is covered with the contact layer, the contact layer is formed by weaving poly (p-phenylene benzobisoxazole) fibers, and the surface of the contact layer is impregnated with a silicone rubber layer. Compared with a traditional wooden dummy, the novel plastic functional wooden dummy is 70% lighter than a traditional wooden dummy through a polymer dummy body core material, free of cracking hidden danger and durable, the framework, the base and the dummy hands are disassembled and assembled, quick disassembly within 3 minutes is achieved, 80% of the containing space is saved, finally, zero-pain beating is achieved through the polymer elastic layer buffering technology, and the novel plastic functional wooden dummy is suitable for multiple scenes.

The invention provides a multi-layer composite structure, a preparation method, a battery cover and electronic equipment, the multi-layer composite structure is formed by a plurality of stacked fiber layers, each fiber layer is formed by dipping a fiber sheet in a pre-polymerized glue solution and then curing the fiber sheet, the fiber sheet in at least one fiber layer adopts poly (p-phenylene benzobisoxazole) fiber, and the fiber sheet in the at least one fiber layer is made of a poly (p-phenylene benzobisoxazole) fiber. The PBO fiber is prepared from the PBO fiber. Therefore, the multi-layer composite structure has higher strength and modulus, energy is absorbed and dispersed when the multi-layer composite structure is impacted, the reliability of the multi-layer composite structure is not influenced when the multi-layer composite structure is impacted on the basis of thinning and weight reduction, and the battery cover formed by the multi-layer composite structure has better anti-puncture performance.

The application discloses a kind of colored poly-p-phenylene benzobisoxazole fibers and its preparation method and system, belong to high-performance fiber material preparation field, by deconstructing PBO polymerization process, PBO primary polymer, colored PBO primary polymer, colored PBO prepolymer and colored PBO polymer are prepared in stages, and based on temperature precision control and online viscosity monitoring technology, the viscosity of each stage material is optimized and controlled, by dispersing pigment in low-viscosity PBO primary polymer system, and the viscosity change of each stage in polymerization process is synergistically controlled, effectively extend the mixing window period of PBO polymer and pigment, to realize the efficient uniform dispersion and stable dyeing of pigment.

This invention discloses a method for preparing a lead-free material with a low coefficient of thermal expansion for flexible electronics, belonging to the field of polymer composite materials technology. The material prepared by this method comprises, along its thickness, layers A, B, and C. Layers A and C use aromatic polyimide as a matrix, with surface-modified hafnium tungstate phosphate nanoparticles dispersed thereon. Layer B uses poly(p-phenylene-2,6-benzobisoxazole) nanofibers as a continuous phase framework, loaded with hexagonal boron nitride nanosheets and Ti3C2T… x MXene nanosheets were obtained by hot pressing three layers together under an argon atmosphere. The resulting material exhibits a coefficient of thermal expansion reduced to 1.2–2.9 ppm / K and an in-plane thermal conductivity of 18.7–25.1 W / (m·K), combining excellent flexibility and mechanical properties. It is suitable for flexible copper-clad laminates, chip packaging, and integrated heat dissipation and shielding substrates for high-power electronic devices.

The invention discloses a liquid guide medium and a preparation method thereof, the liquid guide medium comprises a poly (p-phenylene benzobisoxazole) fiber and a hollow viscose fiber, the poly (p-phenylene benzobisoxazole) fiber is subjected to hydrophilic modification treatment, and the poly (p-phenylene benzobisoxazole) fiber and the hollow viscose fiber are mutually entangled. The liquid guide medium is good in high temperature resistance, good in oil guide performance and high in safety.

The invention provides a flame-retardant anti-static fabric and a preparation method thereof, and belongs to the technical field of functional textiles. The fabric adopts a three-layer composite structure, wherein an outer protective layer is formed by blending and weaving phosphate modified aramid fibers and poly (p-phenylene benzobisoxazole) fibers; the middle conductive layer is composed of a polyaniline fiber coated stainless steel fiber and hydroxylated carbon nanotube complex; and the inner comfortable layer is formed by modified fibers grafted by a nitrogen and phosphorus-containing flame retardant. The three layers are bonded through hot melt adhesive and are subjected to dielectric barrier discharge plasma treatment, so that integrated flame-retardant and anti-static performance is formed. The preparation method comprises the steps of fiber modification, composite layer preparation, plasma treatment and the like. The fabric provided by the invention has high flame retardance, excellent antistatic property and good comfort and durability, and is suitable for the fields of firefighter uniform, electronic industrial protective clothing and the like.

The application belongs to the technical field of new energy materials, and particularly relates to a diaphragm, a preparation method and application thereof. The application provides a diaphragm, which comprises a base film and a heat-resistant coating arranged on at least one side surface of the base film; wherein the heat-resistant coating comprises polyvinylidene fluoride (PVDF) and heat-resistant organic fibers, and the heat-resistant organic fibers optionally comprise at least one of poly-p-phenylene-benzobisoxazole fibers (PBO) and polyether ether ketone fibers (PEEK). The application realizes the combination of "low surface density + high wettability + high heat resistance" by compounding the heat-resistant organic fibers with the PVDF and combining the max double-parameter constraint.

The present invention provides a heat-resistant felt material that prevents needle breakage during needling, and has high heat resistance and durability, and a method for producing the heat-resistant felt material. The heat-resistant felt material includes: a base material layer having at least one layer of a base material; and a lamination web layer having at least one layer of a web for lamination, the lamination web layer being entangled and integrated with an adjacent layer of the base material layer on an outer surface of the base material layer by needling, the base material including a base cloth having filaments containing one or more fibers selected from the group consisting of aramid fibers and poly-p-phenylene benzobisoxazole fibers, the base cloth having a density of 0.60 g / cm 3 The following.

This application relates to the technical field of high-performance fiber production methods, providing a UV-resistant PBO fiber with excellent mechanical properties and its preparation method. The poly(p-phenylene benzodioxazole) fiber prepared by the method provided in this application has DHPBO segments regularly embedded in its molecular structure, and the proportion of DHPBO segments in the modified poly(p-phenylene benzodioxazole) fiber is less than or equal to 20%. Fibers spun from this method, with single DHPBO segments regularly embedded in the PBO macromolecule, exhibit a tensile strength at break of at least 30 cN / dtex. After irradiation for 100 hours in a dry environment at 50°C under a 340 nm UV light source, its tensile strength retention rate is still greater than 85%, and after irradiation for 300 hours, its tensile strength retention rate is still greater than 65%. Therefore, the PBO fiber prepared by the method of this application possesses excellent mechanical properties and UV resistance.