34results 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.

Nanofibrous materials and their fabrication by electrospinning are disclosed for passive temperature control on earth and in outer space. The materials combine high solar reflectivity with high thermal emittance in the infrared region, including in the long wavelength atmospheric window region between 8 μm and 13 μm. The materials include nanofibrous PTFE / PEO and silica materials. The physical properties of the materials are suitable for extraterrestrial as well as terrestrial applications.

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.

The present invention provides amorphous epoxy fibers with excellent dimensional stability, a fiber structure at least partially comprising such fibers, and a molded article obtained by melting such fibers. The amorphous epoxy fibers have a birefringence value of 0.005 or less. For example, the amorphous epoxy fibers may comprise an amorphous epoxy resin represented by the following general formula. Furthermore, the average fiber diameter of a single fiber of the amorphous epoxy fibers may be 40 μm or less. (Wherein, X is a dihydric phenol residue and n is 20 or greater)#imgabs0#

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 environmentally friendly spinning polymer solution for generating a nanofibrous structure in an electrostatic field includes a polymer, a solvent system, and possibly other additives to modify the conductivity of the solution. The polymer at a concentration of 10 to 20 wt% is at least one polymer from the group consisting of polylactic acid (PLA), polysulfone (PSU), polyurethane (PU), and cellulose acetate (CA). The solvent system is a green solvent system comprising at least two of the green solvents selected from the group consisting of cyclopentanone (CPO), ethyl lactate (EL), methyl lactate (ML), and acetone. The nanofibrous nonwoven fabric, which can be prepared by spinning the mentioned spinning polymer solution, contains nanofibers with an average diameter of 100 to 500 nm.

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.

To provide a manufacturing method for a low-formaldehyde content POM fiber that generates a small amount of formaldehyde from the fiber, and the POM fiber manufactured by the method.SOLUTION: There is provided a method that involves adding 0.1 to 5 wt.% of melamine or a melamine derivative, 0.01 to 5 wt.% of an alkaline earth metal hydroxide, and 0.01 to 5 wt.% of an antioxidant to a crude polymer after a POM polymerization reaction to obtain a heat-stabilized POM resin, and then adding 0.01 to 5 wt.% of a formalin scavenger to a resulting POM resin and melt-spinning a resulting resin to obtain a POM fiber with a low formaldehyde content. When spinning an alloy of POM and a biodegradable polyester resin such as PBS or PLA, a safely performed fiber with a low formaldehyde content can be obtained by further adding 0.1 to 5 wt.% of a carbodiimide compound.SELECTED DRAWING: None

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.

The present invention provides a medical dressing article and a method of manufacturing the same, which comprises: (a) a first layer comprised of polycaprocaptone fibers having a PCL fiber diameter of 0.5 μm and 2.9 μm; (b) a second layer, deposited directly on the first layer, including a mixture of polycaprolactone and poloxamer fibers (PCL and POX fibers) wherein a PCL and POX fiber diameter is between 0.1 μm and 4 μm; and (c) a third layer, deposited directly on the second layer, further comprising a mixture of gelatin and silver nitrate (AgNO3).

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 present invention discloses a high-temperature-resistant, temperature-sensitive composite nanofiber membrane, its preparation method, and application. The thermosensitive composite nanofiber membrane is an electrospun polydiacetylene / polyarylethernitrile composite nanofiber membrane. It undergoes a cross-linking reaction upon ultraviolet irradiation, changing its apparent color to blue. It then turns red at temperatures of 60°C or above and can withstand temperatures up to 170°C without shrinking. The high-temperature-resistant, temperature-sensitive composite nanofiber membrane prepared by the present invention not only exhibits high heat resistance but can also detect alkaline solutions. Therefore, it has broad application prospects in the fields of high-temperature detection and detection of alkaline environments.

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.

Fibrous elements containing one or more fibrous element-forming materials and one or more polyethylene oxides, and methods for making same are provided.

The purpose of the present invention is to provide PPE fibers in which fiber-diameter unevenness in the fiber length direction is controlled to a minimum, and activated carbon fibers employing the PPE fibers as a raw cotton. Furthermore, another purpose of the present invention is to provide a PPE-fiber manufacturing method by which PPE fibers can be efficiently manufactured over long periods while preventing hindrances, such as thread breakage during spinning, from occurring over long periods. The present invention relates to polyphenylene ether fibers containing polyphenylene ether components, the polyphenylene ether fibers being characterized in that the Uster index (URI) value is less than 33.1%. Also, the present invention relates to a polyphenylene ether fiber manufacturing method characterized by including: a step of melt-extruding polyphenylene ether, which is the raw material, by using an extruder equipped with a cylinder, a screw, and a degassing vent, while degassing the raw material through the degassing vent; and a step of pumping the molten polyphenylene ether through a spinning nozzle to be spun.

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.

To provide a pressed strand composition for producing a polymer strand.SOLUTION: There is provided a pressed strand composition for forming a multifilament strand, wherein the pressed strand composition comprises: (a) a poly(ethylene oxide) having a weight average molecular weight (Mw) of 100 kDa or greater, and the poly(ethylene oxide) is dissolved in an aqueous solvent at a poly(ethylene oxide) concentration greater than an entanglement concentration (ce) of the poly(ethylene oxide) in the composition; and (b) one or more other polymeric chemicals.SELECTED DRAWING: Figure 1

The invention provides a multifunctional polyether ester fiber composite membrane as well as a preparation method and application thereof, and belongs to the technical field of preparation of biomedical materials in the chemical aspect of bandages, dressings, absorption pads or surgical supplies. The multifunctional polyether ester fiber composite membrane comprises a polyether ester (TPEE) fiber membrane substrate; and a functional coating deposited on the surface of the polyether ester (TPEE) fiber membrane substrate, wherein the functional coating comprises MXene and sodium chloride (NaCl). And the MXene is Ti < 3 > C < 2 > T < x >. The multifunctional polyether ester fiber composite membrane realizes good balance between conductivity and stretchability.

Provided is a wire rod for three-dimensional molding, which is capable of three-dimensional molding by a hot melt deposition method. Provided are a three-dimensional molded article using a wire for three-dimensional molding, and a method for producing the three-dimensional molded article. The wire rod for three-dimensional molding contains a polyacetal resin, and has a difference (Tm2-Tc) between a melting point Tm2 and a crystallization temperature Tc measured by a differential scanning calorimeter of 22 DEG C to 40 DEG C, inclusive, and a melt flow rate of 0.8 g / 10 minutes to 8.0 g / 10 minutes, inclusive, measured at a temperature of 190 DEG C and a load of 2.16 kg.

The present invention provides portable devices and systems for electrofocused blow spinning, and methods for using the same. The devices of the invention are convenient to carry and use and are able to aerodynamically spin a variety of materials in a mobile setting.

The minimum value (% / °C) of the differential thermogravimetric curve of the flame-resistant polyphenylene ether molded article of the present invention in the range of 400°C to 550°C is greater than or equal to -0.40% / °C and less than or equal to -0.10% / °C.

An ink and electrodes fabricated with the ink. The ink includes a dispersion of fibers in at least one solvent. Said fibers have one or more fiber types, where at least one type of said fibers comprises at least one catalyst for an electrochemical reaction and at least one binder polymer.

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 present invention provides portable devices and systems for electrofocused blow spinning, and methods for using the same. The devices of the invention are convenient to carry and use and are able to aerodynamically spin a variety of materials in a mobile setting.