813 results about "Polyether sulphone" patented technology

A polyethersulfone composition is disclosed which comprises structural units derived from a monomer mixture comprising fluorenylidene bisphenol-A and at least 50 mole percent of 4,4′-biphenol based on total moles of diphenolic monomers, wherein the polyethersulfone has a minimum glass transition temperature of 235° C. and a notched Izod impact value of 1 ft-lb/in. as measured by ASTM D256.

There is disclosed a multilayer insulated wire which comprises a conductor and solderable extrusion-insulating layers made up of two or more layers for covering the conductor, wherein at least one insulating layer is formed by a mixture comprising 100 parts by weight of a resin (A), of at least one selected from the group consisting of polyetherimide resins and polyethersulfone resins, 10 parts by weight or more of a resin (B), of at least one selected from the group consisting of polycarbonate resins, polyarylate resins, polyester resins, and polyamide resin, and 15 to 200 parts by weight of an inorganic filler (C). There is also disclosed a transformer which utilizes the multilayer insulted wire. The multilayer insulated wire is excellent in heat resistance, solderability, high-frequency characteristic, and coilability, and it is favorably suitable for industrial production. Further, the transformer utilizing the multilayer insulated wire is excellent in electrical properties and high in reliability, since when used at high frequencies, electric properties are not lowered and influence by the generation of heat can be prevented.

An inexpensive and durable polyelectrolyte composition includes both an aromatic polymer containing carbonyl linkages and/or sulfonyl linkages in the backbone chain and bearing cation-exchange groups and a fused salt exhibits a high ionic conductivity even in the absence of water or a solvent. The aromatic polymer is preferably an aromatic polyether sulfone comprising specific structural units and bearing cation-exchange groups, an aromatic polyether ketone comprising specific structural units and bearing cation-exchange groups, an aromatic polyether sulfone block copolymer consisting of at least one hydrophilic segment bearing cation-exchange groups and at least one hydrophobic segment free from cation-exchange groups, and/or an aromatic polyether ketone block copolymer consisting of at least one hydrophilic segment bearing cation-exchange groups and at least one hydrophobic segment free from cation-exchange groups. The use of such a block copolymer as the aromatic polymer gives polyelectrolyte compositions which are excellent in maintenance of structure even at high temperature.

The invention discloses a preparation method of high-purity mannan oligosaccharide. The preparation method comprises the steps of 1, producing a mannan oligosaccharide mixture through enzymolysis conversion; 2, carrying out centrifugal separation: separating enzymatic hydrolysate through a centrifugal machine; 3, carrying out ceramic membrane filtration: filtering centrifugate through a ceramic membrane group as precision separation to remove protein, starch and polysaccharide substances; 4, carrying out ion exchange refining: desalting, decoloring and deodorizing filtrate through a mannan oligosaccharide ceramic membrane; 5, carrying out 2000 molecular weight ultrafiltration: ultrafiltering ion exchange refining liquid through a polyether sulfone-polyamide composite membrane with interception as Dalton to obtain a polymerization degree; 6, carrying out nanofiltration: filtering sugar liquid through a ceramic membrane, ion exchange refining and an ultrafiltration membrane; and 7, carrying out spray drying: preheating a nano-filtered concentrated solution, and drying in a spray drying tower. The dried product contains more than 95% of mannan oligosaccharide, and has an obvious function of multiplying bifidobacterium; meanwhile, the product, as a most promising substitute, can reduce harmful bacteria.

The invention discloses a method for preparing an asymmetric nanofiltration membrane by blending polyether sulfone and sulfonated polysulfone high polymers. A blending nanofiltration membrane with an asymmetric structure is prepared in one step by the nanofiltration membrane through a phase transformation method. The method comprises the following steps of: preparing casting membrane liquid, namely mixing the polyether sulfone, the sulfonated polysulfone high polymers, an additive and a solvent to prepare the casting membrane liquid; and forming a membrane by the phase transformation method, wherein the membrane comprises a flat membrane and a hollow fibrous membrane. The interception rate of the nanofiltration membrane to 0.5 to 1.5 g/L sodium chloride and 0.5 to 1.5 g/L sodium sulfate under the operating pressure of between 0.1 and 0.8 MPa is between 20 and 95 percent, the interception rate of the nanofiltration membrane to polyethylene glycol with the relative molecular mass of between 600 and 2,000 is between 40 and 99.9 percent, and the pure water flux of the membrane is between 10 and 250 L/(m2hbar). The asymmetric nanofiltration membrane of the invention has the advantages of high strength and toughness, high compactness resistance, chlorine resistance and high-temperature resistance, and can be applied to aspects of water treatment, wastewater treatment, material separation and the like.

Sulfonated block copolymers that may be used as membranes for fuel cells include sulfonated polyaryletherketone blocks and lightly sulfonated polyethersulfone blocks.

The sulfonated polyaryletherketone blocks include structural units of formula

and the lightly sulfonated polyethersulfone blocks include structural units of formula

wherein

• • R¹, R², R³, R⁴, R⁵ and R⁶ are independently C₁-C₁₀ alkyl, C₃-C₁₂ cycloalkyl, C₆-C₁₄ aryl, allyl, alkenyl, alkoxy, halo, or cyano;
  • Z, Z¹ and Z² are independently a direct bond or O, S, (CH₂)_r, (CF₂)_r, C(CH₃)₂, C(CF₃)₂, or a combination thereof; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof; a and e are independently 0 or an integer from 1 to 3; b, c, d, and f are independently 0 or an integer from 1 to 4; m, n and p are independently 0 or 1; and r is an integer from 1 to 5.

The invention discloses an amphiphilic triblock copolymer with a structural general formula represented as the following. In the formula, when M1 is vinylpyrrolidone and M2 is acrylic acid, M3 is styrene or acrylonitrile or methyl methacrylate; or when M1 is vinylpyrrolidone and M2 is a chemical bond, M3 is styrene or acrylonitrile. m, n, p, q, are all lager than 1. A number-average molecular weight of the copolymer is 30000 to 100000, a glass-transition temperature of the copolymer is 90-180 DEG C, and a decomposition temperature of the copolymer is 180-430 DEG C. The invention also discloses a preparation method of the copolymer, and a polyethersulfone hollow fiber membrane blend-modified by using the amphiphilic triblock copolymer. The amphiphilic triblock copolymer provided by the invention is insoluble in water. When the amphiphilic triblock copolymer is blended with polyethersulfone and is prepared into a polyethersulfone hollow fiber membrane, the amphiphilic triblock copolymeris hard to precipitate. Therefore, the polyethersulfone hollow fiber membrane is provided with permanent hydrophilicity, protein pollution resistance and excellent blood compatibility. The polyethersulfone hollow fiber membrane can be used in the field of blood purification. The preparation method provided by the invention is simple, and is easy to operate. With the method, industrialization is easy to realize.

The invention discloses a preparation method of a metal ion-carried nerchinskite nano tube/polyether sulfone hybridized antibacterial membrane, and belongs to the technical field of membranes. The invention is characterized in that: the antibacterial property and the contamination resistance of the membrane are improved by using the antibacterial property of a metal ion-carried nerchinskite nano tube and the hydrophilic property of the nerchinskite nano tube under the condition that the water flux and the interception rate of the polyether sulfone ultra-filtration membrane are not reduced. Meanwhile, the preparation method and preparation equipment are simple. The membrane serving as a novel ultra-filtration membrane is expected to be applied in wastewater treatment more widely.

The invention relates to a cross-linked sulfonated polysulfone/polyether sulfone-sulfonated polysulfone composite membrane and a manufacturing method of the cross-linked sulfonated polysulfone/polyether sulfone-sulfonated polysulfone composite membrane. Polyhydroxyl or multi-amino or hyperbranched substances are selected, a polyether sulfone/sulfonated polysulfone blended ultra-filtration base membrane is coated with a cross-linked sulfonated polysulfone solution to manufacture the composite membrane, a composite membrane separation layer of which the thickness is 1 micrometer-10 micrometers is formed on the surface of the base membrane, the water contact angle of the surface of the composite membrane separation layer ranges from 40 degrees to 90 degrees, and the composite membrane separation layer has good osmosis and separation properties. The manufacturing method includes the steps that sulfonated polysulfone of different concentrations and sulfonation degrees, m-phenylenediamine, polyethylene glycol, dopamine, H30 and other cross-linking agents are dissolved in solvent to manufacture the coating solution, with the polyether sulfone/sulfonated polysulfone blended ultra-filtration being the base membrane, the composite membrane separation layer is manufactured under vacuum conditions, and finally the cross-linked sulfonated polysulfone/polyether sulfone-sulfonated polysulfone composite membrane which is hydrophilic is obtained. The manufactured composite membrane has the good osmosis and separation properties, and can be used for nanofiltration and forward osmosis processes and membrane separation processes including seawater desalting, waste water treatment, domestic water treatment and bio-separation.

A hollow modified polyethersulfone fibre membrane is prepared through proportionally mixing polyethersulfone, hydrophilic high-molecular material, pore-forming agent and solvent, stirring at 75-95 deg.C for 2-24 hr, dissolving the bioactive macro-molecular material in water, slowly adding it to said solution of polyethersulfone, stirring, fitlering, defoaming, curing, dry-wet spinning, shaping in water bath at 20-42 deg.C, drafting, winding and post-treating.

The invention discloses a multilayer composite ultrafiltration membrane and a preparation method thereof. The multilayer composite ultrafiltration membrane is characterized by being provided with five layers of structures, wherein each of the inner and outer surfaces of the ultrafiltration membrane is a PET or PP non-woven fabric base body, each of the inner and outer subsurfaces of the ultrafiltration membrane is a polymer nanofiber membrane layer, and the middle layer of the ultrafiltration membrane is a cellulose nanofiber membrane layer. A polymer in the polymer nanofiber membrane layer is selected from one of polyether sulfone, polysulfone, polyacrylonitrile and polyvinylidene fluoride film forming polymers, and then is processed to prepare a spinning solution, and electrostatic spinning dope forms the polymer nanofiber membrane layers on PET or PP non-woven fabrics serving as the base bodies for electrostatic spinning collection. The cellulose nanofiber membrane layers are prepared by selecting one of bamboo, wood, cotton and linen, dissociating fiber slurry and processing. The multilayer composite ultrafiltration membrane prepared by the method has good hydrophily, higher pollutant resistance and water flux, and better interception characteristic, and is more economical in use and longer in service life.

The invention provides a preparation method and application of a lithium-ion-imprinted polyethersulfone composite membrane, belonging to the technical field of preparation of functional materials. The lithium-ion-imprinted polyethersulfone composite membrane is prepared with a polyethersulfone membrane as a substrate membrane material, lithium ions as a template, 12-crown-4-ether as a binding site, methacrylic acid as a functional monomer, ethylene glycol dimethacrylate as a cross-linking agent and azodiisobutyronitrile as an initiator by using a combination of dopamine surface modification technology, silica nanometer compounding technology and imprinted polymerization technology. Static adsorption experiments are conducted to research the adsorption equilibrium, kinetic performance and selective recognition performance of the prepared lithium-ion-imprinted polyethersulfone composite membrane; and selective permeation experiments are carried out to research the permeation action of the prepared lithium-ion-imprinted polyethersulfone composite membrane on target ions (lithium ions) and non-target ions (sodium ions and potassium ions). The lithium-ion-imprinted polyethersulfone composite membrane prepared in the invention has high specific lithium ion adsorption capability and lithium ion recognition and separation capability.

A polyelectrolyte for a solid polymeric fuel cell comprising an aromatic polyether sulfone block copolymer comprising a hydrophilic segment containing sulfonic acid groups and a hydrophobic segment having no sulfonic acid group at a hydrophilic segment weight fraction W2 to hydrophobic segment weight fraction W1 ratio falling within a range of 0.6<W2/W1<2.0. The polyelectrolyte for a solid polymeric fuel cell is inexpensive and durable, and its proton conductivity is less influenced by humidity and temperature.

The invention provides a polymer containing a quaternary ammonium group. The polymer is obtained through a reaction of a quaternization reagent and a polymer with a side chain containing a tertiary amine group. The polymer with the side chain containing the tertiary amine group is one or more of polyether sulphone with a side chain containing a tertiary amine group and polyaryletherketone with a side chain containing a tertiary amine group and PPESK with a side chain containing a tertiary amine group. The quaternization reagent is one or more of iodomethane, (3-chloropropyl) trimethoxy silane and a (3-chloropropyl) trimethoxy silane system. According to the polymer, the polyether sulphone with the side chain containing the tertiary amine group and the polyaryletherketone with the side chain containing the tertiary amine group and the PPESK with the side chain containing the tertiary amine group are adopted as raw materials, grafting is performed on the appropriate condition to generate the quaternary ammonium group, a siloxane group and the quaternary ammonium group exist in a novel anion exchange membrane material structure in a covalent bond binding mode, the alkali stability and the size stability of the membrane material are improved, and meanwhile the tenacity and mechanical performance of the membrane material can be improved.

The invention provides polyether sulphone containing a plurality of quaternary ammonium salt phenyl side group structures. The preparation method for polyether sulphone comprises the following steps: firstly, producing copolycondensation of an active difluorosulphone monomer containing the polymethyl structure, 4,4'-difluorodiphenyl sulfone and biphenol to prepare polyether sulphone containing a polymethyl structure; secondly, converting prepared polyether sulphone containing the polymethyl structure into a polymer containing a bromomethyl structure by utilizing a bromination reaction; finally, by utilizing a nucleophilic substitution reaction, reacting the polymer containing the bromomethyl structure with trimethylamine to obtain polyether sulphone containing the plurality of quaternary ammonium salt phenyl side group structures. Polyether sulphone has good film-forming property; a prepared polymer thin film has good alkali resistance, relatively high ionic conductivity and excellent size stability, and can serve as an anion exchange membrane material for alkaline fuel cells.

The invention provides a preparation method and a using method of a carbon fiber compounded polyether sulfone resin sizing agent. A new carbon fiber sizing agent component for polyether sulfone resin is prepared for solving the problem that an epoxy sizing agent is not suitable for the carbon fiber compounded polyether sulfone material, and can effectively improve the interface bonding property of carbon fibers and polyether sulfone and improve the high temperature resistance of a composite material. A preparation method comprises the steps of processing polyether sulfone resin with a sulfonating agent to obtain a main component (sulfonic polyether sulfone) of the sizing agent; preparing a sizing solution and dipping the carbon fiber to obtain the sizing carbon fiber. The method can improve the interface bonding property of the carbon fiber compounded polyether sulfone resin and can fully achieve high specific strength of the carbon fiber and high temperature resistance of the polyether sulfone.

The invention relates to a preparation method of polyethersulfone type hyper branched epoxy resin and application in toughening of linear epoxy resin. A polyethersulfone type hyper branched polymer is prepared by one-step method, the hyper branched polymer is prepared from disulfone, triol and trihydric phenol as raw materials by reaction between different end groups, and the polyethersulfone type hyper branched epoxy resin is prepared by end group epoxidation. A linear epoxy resin toughened modified material involved in the invention is prepared by using bisphenol A type linear epoxy resin as a base material, the polyethersulfone type hyper branched epoxy resin as a super toughening agent and adding a curing agent. The dosage of the polyethersulfone type hyper branched epoxy resin is 3%-30% of the epoxy resin weight. The impact strength of the epoxy modified material is increased by 89.9% compared with that of a pure bisphenol A type epoxy material, the elongation at break is increased by 73.9%, the tensile strength is increased by 19.6%, and the glass transition temperature is increased by 13.7%.

The invention discloses a water-based non-stick polyether sulphone coating composition containing no perfluorooctanoic acid. The composition comprises (1) 8 to 25 weight percent of polyether sulphone, (2) 2 to 15 weight percent of fluorocarbon polymer containing no perfluorooctanoic acid, (3) 40 to 90 weight percent of water-based dispersant and (4) 0 to 20 weight percent of toner for coloring. The coating composition adopts distilled water as a thinner in spraying, reduces the use amount of an organic solvent, meets the requirement of environmental protection, contains no perfluorooctanoic acid (PFOA), and achieves the requirement of harmlessness to a human body.