17results about "Monocomponent polyethers artificial filament" patented technology

The invention discloses a method for preparing micro-nano fibers through needle-free electrostatic spinning equipment assisted by an ion blower gun, and belongs to the technical field of spinning. The method specifically comprises the following steps: S1, dissolving a high-molecular polymer in a proper solvent to prepare a spinning precursor solution; and S2, preparing the micro-nano fiber from the spinning solution on a suitable collection surface by using an ion blower gun assisted needleless electrostatic spinning device. Through the synergistic effect of directional airflow generated by the ion blower gun and a controllable electric field, fiber surface charges are effectively neutralized, the jet instability is inhibited, and the controllability of a fiber flight path is improved. Meanwhile, the ionic wind assists in enhancing interface attachment between the fiber and the collector, uniform deposition is promoted, and the compactness and adhesive force of the fiber membrane are remarkably improved. According to the method, chemical modification does not need to be carried out on a material system, the intrinsic performance of the fiber is kept, universality and expandability are achieved, and a new path is provided for continuous preparation of the high-performance micro-nano fiber.

The invention discloses a polyetherketoneketone fiber anti-adhesion porous spinning method. The method comprises the following steps: dissolving polyetherketoneketone to obtain a spinning solution, and extruding the spinning solution through a porous spinneret plate to form a plurality of spinning trickles; the trickles enter a first coagulating bath to be preliminarily coagulated and formed, and fibers are obtained; dividing the fibers by a split type dividing plate, guiding the fibers into a second coagulating bath by a godet, washing with water, applying oil, and then drying; fibers enter the hot drafting device to be subjected to multi-stage hot drafting, and after heat setting, the fibers are tidied and wound by the buncher. The first coagulating bath is provided with a bath lotion supplementing unit, a circulating filtering system and an ultrasonic generator which are combined to quickly and uniformly update components of the coagulating bath; and the split type filament separating plate keeps a distance between fibers, prevents mutual adhesion and improves the double-diffusion efficiency in the second coagulating bath. The ultrasonic-assisted circulating filtration system is used for updating the synergistic effect of the coagulating bath and the split type filament separating plate, so that the problems that fibers are easy to adhere and are uneven in evenness and performance are effectively solved.

The invention relates to the technical field of lithium ion batteries, and discloses a polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material, a polyethylene oxide nanofiber modified lithium iron phosphate positive electrode plate and a lithium ion battery. The polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material comprises lithium iron phosphate and polyethylene oxide nanofiber in a content mass ratio of (90-98): 1, the polyethylene oxide nanofiber is obtained by electrostatic spinning of a spinning solution containing polyethylene oxide; the fiber diameter of the polyethylene oxide nanofiber is 50-500 nm, and the specific surface area of the polyethylene oxide nanofiber is 30-50 m < 2 > / g. When the polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material provided by the invention is used in a lithium ion battery, the lithium ion transmission efficiency can be improved.

A process for producing a polymer strand involves: inserting a nucleation element into a pre-strand composition, the pre-strand composition comprising a polymer mixed with a solvent, the polymer having a concentration in the pre-strand composition that is greater than or equal to an overlap concentration (c*) of the polymer in the pre-strand composition; and, withdrawing the nucleation element from the pre-strand composition so that a strand comprising the polymer is pulled by the nucleation element from the pre-strand composition, the nucleation element being withdrawn at a rate such that a pull time (τpull) of the nucleation element is less than a reptation time (τrep) required to relax polymer entanglements in the pre-strand composition, thereby inducing a viscoelastic response in the pre-strand composition as the strand is pulled by the nucleation element from the pre-strand composition.

Provided is a filament for three-dimensional molding with which three-dimensional molding with fused filament fabrication is possible. Provided are a three-dimensional molded article using the filament for three-dimensional molding and a method for producing the same.The filament for three-dimensional molding contains a polyacetal resin, wherein a difference between a melting point Tm2 and a crystallization temperature Tc (Tm2−Tc) measured by a differential scanning calorimeter is 22° C. or higher and 40° C. or lower, and a melt flow rate measured at a temperature of 190° C. and a load of 2.16 kg is 0.8 g / 10 min. or more and 8.0 g / 10 min. or less.

The application belongs to the technical field of metal plate synthesis, and particularly relates to a preparation method of a continuous carbon fiber reinforced polyether ether ketone matrix fiber metal laminate, and the mass fractions of the raw materials for preparing the continuous carbon fiber reinforced polyether ether ketone matrix fiber metal laminate are as follows: tetrabutyl titanate 3-5 parts, silane coupling agent 10-15 parts, polyether ether ketone 2.5-5 parts, alcoholized CNT 0.4-0.7 parts, Al2O3 0.5 parts, boron nitride 0.3 parts and tetraisopropyl titanate 1-1.5 parts; carbon cloth is used as a substrate, tetrabutyl titanate is impregnated to generate TiC on the surface of the fiber in situ through annealing, PEEK-silane is deposited through electrospinning to construct a triple strong interface, and the carbon fiber reinforcing effect is exerted; a composite transition layer containing Al2O3 / boron nitride is prepared through electrostatic auxiliary deposition of a metal layer, and a double strong interface is constructed through amination, and finally two layers of hydrogen bonds are connected into an integrated structure, so that the mechanical properties and high-temperature stability are synergistically improved.

The purpose of the present invention is to provide a PPE fiber with excellent oxidation resistance and an activated carbon fiber that uses the PPE fiber as raw stock. Another purpose of the present invention is to provide a method that makes it possible to efficiently produce PPE fibers having excellent oxidation resistance. The present invention relates to a polyphenylene ether fiber that contains a polyphenylene ether component and is characterized in that the amount of gas generated when the polyphenylene ether fiber is heated at 320°C for 10 minutes is 1500 ppm or more. The present invention also relates to a method for producing a polyphenylene ether fiber, the method being characterized in that: said method includes a step in which a polyphenylene ether serving as a starting material is melt-extruded using an extruder equipped with a cylinder and a screw, and a step in which the molten polyphenylene ether is discharged from a spinning nozzle and spun; and degassing is not performed in the step for melt-extruding.

The invention relates to the technical field of lithium ion batteries, and discloses a polyethylene oxide nanofiber modified graphite negative electrode material, a negative electrode plate and a lithium ion battery, the negative electrode material comprises graphite and polyethylene oxide nanofiber in a mass ratio of (90-98): 1; the polyethylene oxide nanofiber is obtained by electrostatic spinning of a spinning solution containing polyethylene oxide; the average diameter of the polyethylene oxide nanofiber is 100-800nm, the specific surface area is 30-200m < 2 > / g, and the lithium ion conductivity is greater than or equal to 1 * 10 <-5 > S / cm. When the polyethylene oxide nanofiber modified graphite negative electrode material provided by the invention is used in a lithium ion battery, the lithium ion transmission efficiency can be improved.

The present invention relates to a method for manufacturing a hollow fiber carbon membrane, the method comprising a step (a) for preparing a carbon-membrane-forming stock solution and molding hollow fibers through a spinning method for subjecting the carbon-membrane-forming stock solution to non-solvent-induced separation using a double annular nozzle, a step (b) for winding the molded hollow fibers onto the outer periphery of a bobbin having a polygonal outer periphery, a step (c) for heating the wound hollow fibers while rotating the bobbin to perform a crosslinking treatment, a step (d) for raising the temperature of the post-crosslinking-treatment hollow fibers from a prescribed temperature and heating and infusibilizing the hollow fibers, and a step (e) for subjecting the hollow fibers subjected to the infusibilization treatment to a carbonization treatment, the carbon-membrane-forming stock solution containing polyphenylene oxide in an amount of 15-40 mass%, sulfur in an amount of 7-15 mass% with respect to the polyphenylene oxide, and a solvent capable of dissolving the aforementioned components.

An object of the present invention is to provide a polyphenylene ether melt extrusion formed body which can be obtained by melt forming without mixing other resin components and has excellent properties such as mechanical strength, and a method for producing the same. The present invention relates to a polyphenylene ether melt extrusion formed body comprising a polyphenylene ether component which has a rearrangement structure having a continuous structure bonded at an ortho-position in a repeating unit continuously bonded at a para-position.

The present disclosure provides a process for producing a polymer, said process comprising polymerising a monomer system comprising a compound of formula: Ar- O-Ar-C(=O)-X-C(=O)-Ar-O-Ar in a reaction medium comprising a Lewis acid where: X is an aliphatic moiety and Ar is an aromatic moiety.

The invention belongs to the field of high polymer materials, and discloses a method for preparing a phenolphthalein-based polyaryletherketone nanofiber membrane based on electrostatic spinning of a bio-based cyclic lactone green solvent system. The bio-based cyclic lactone green solvent is adopted as the electrostatic spinning solvent of phenolphthalein polyaryletherketone, a matched process window is matched, green and environment-friendly production is achieved, and the obtained nanofiber membrane is uniform in fiber morphology and excellent in performance and has application prospects in the fields of separation and filtration, energy environmental protection and the like.

A process for producing a polymer strand involves: inserting a nucleation element into a pre-strand composition, the pre-strand composition comprising a polymer mixed with a solvent, the polymer having a concentration in the pre-strand composition that is greater than or equal to an overlap concentration (c*) of the polymer in the pre-strand composition; and, withdrawing the nucleation element from the pre-strand composition so that a strand comprising the polymer is pulled by the nucleation element from the pre-strand composition, the nucleation element being withdrawn at a rate such that a pull time (τpull) of the nucleation element is less than reptation time (τrep) required to relax polymer entanglements in the pre-strand composition, thereby inducing a viscoelastic response in the pre-strand composition as the strand is pulled by the nucleation element from the pre-strand composition.

The purpose of the present invention is to provide a PPE fiber with excellent lightweight properties, and an activated carbon fiber using the PPE fiber as raw cotton. Another purpose of the present invention is to provide a method for producing a PPE fiber, the method making it possible to suppress single yarn breakage and efficiently produce a PPE fiber with excellent lightweight properties. The present invention relates to a polyphenylene ether fiber containing a polyphenylene ether component, and having an average number of cells of 1 or more per 1 mm2 in a cross-section of the polyphenylene ether fiber, a single yarn fineness of 100 dtex or less, and a viscosity of 0.50 dl / g or less. The present invention further relates to a method for producing a polyphenylene ether fiber, the method comprising: a step for melt-extruding a polyphenylene ether, which is a starting material, using an extruder equipped with a cylinder and a screw; and a step for discharging the molten polyphenylene ether from a spinning nozzle and spinning the polyphenylene ether, wherein degassing is not performed in the melt-extruding step.

A composite filter material consisting of a precision fabric of the type having weft and warp threads, on whose surface nanofibers are deposited by electrospinning. A method for producing a composite filter material, comprising a step of electrospinning to form nanofibers, followed by a step of depositing said nanofibers on a substrate; the method comprises establishing a potential difference between a nozzle and an electrode; the nanofibers are formed as a result of evaporation of a solvent or mixture of solvents by an electric field and stretching of a polymer deposited on the electrode by the nozzle; the nanofibers thus formed are then stretched and deposited on said substrate.

The application provides a multifunctional polyether ester fiber composite film and a preparation method and application thereof, and belongs to the technical field of biomedical material preparation in the chemical aspect of bandages, dressings, absorbent pads or surgical products. The multifunctional polyether ester fiber composite film comprises a polyether ester (TPEE) fiber film substrate and a functional coating deposited on the surface of the polyether ester (TPEE) fiber film substrate, wherein the functional coating comprises MXene and sodium chloride (NaCl). The MXene is Ti3C2T x The multifunctional polyether ester fiber composite film realizes a good balance between conductivity and stretchability.