187 results about "Polyetherimide" patented technology

The application discloses a quinoline small molecule blended modified polymer dielectric material and a preparation method and application thereof, and belongs to the technical field of capacitor films. The preparation raw materials comprise quinoline derivatives, polymethyl methacrylate, styrene-methyl methacrylate copolymer, polyetherimide, polypropylene and N-methyl pyrrolidone solution, and the preparation steps comprise blending and film preparation. The blending solution or eutectic mixture is prepared through blending, and the polymer dielectric film is prepared through a flow casting method or bidirectional stretching. The prepared quinoline small molecule blended modified polymer dielectric film has excellent electrical properties, can reduce the leakage current of the polymer material, has high DC breakdown field strength, high energy storage density and low energy loss, and is easy to realize large-scale production.

The embodiment of the invention provides a carbon fiber sizing agent, a modified carbon fiber, a composite material and a method, and relates to the technical field of carbon fiber surface treatment. The carbon fiber sizing agent comprises the following components: polyetherimide, amino-functionalized ZIF-8 and an organic solvent, wherein the mass of the amino-functionalized ZIF-8 is 1%-10% of the mass of the polyetherimide. According to the carbon fiber sizing agent, the modified carbon fiber, the composite material and the method provided by the embodiment of the invention, the interface bonding strength and the heat resistance of the carbon fiber and the resin matrix in the carbon fiber composite material can be improved.

The invention provides a carbon nanotube-polyetherimide grafted carbon fiber / nylon composite material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: mixing polyetherimide, a condensing agent, acidified carbon fibers and an organic solvent, and carrying out first amidation reaction to obtain polyetherimide grafted carbon fibers; mixing the polyetherimide grafted carbon fibers, a condensing agent, acidified carbon nanotubes and an organic solvent, and carrying out a second amidation reaction to obtain carbon nanotube-polyetherimide grafted carbon fibers; the carbon nanotube-polyetherimide grafted carbon fibers and nylon resin are subjected to melt blending to obtain the carbon nanotube-polyetherimide grafted carbon fiber / nylon composite material, so that the carbon nanotubes are uniformly dispersed on the surfaces of the carbon fibers, the reinforcing effect of the carbon nanotubes is fully exerted, the nanoscale roughness of the surfaces of the carbon fibers is also increased, and the carbon nanotube-polyetherimide grafted carbon fiber / nylon composite material is prepared. The multi-level reinforcement from micron level to nano level is realized, and the mechanical property of the composite material is obviously improved.

The application provides a photoresist waste liquid recycling device and process, by adding hydrochloric acid to the photoresist waste liquid in the acidification precipitation tank in the pretreatment module to adjust the pH value, the linear phenolic resin precipitation rate reaches more than 95%, and the linear phenolic resin can be used again to the production stage of the photoresist after centrifugal separation, a compound coagulant containing sulfide and polyaluminum chloride is added to the heavy metal capture tank in the pretreatment module, and the removal rate of heavy metal ions reaches 99.5%; then the photoresist fragments are separated by using an ultrafiltration device, and the diatomite modified by NaOH and polyetherimide is used for adsorption and decolorization, then two-stage vacuum distillation process is used to realize the recovery of high-purity solvents in the photoresist waste liquid, finally, the remaining residue is polymerized and cured by ultraviolet radiation, and the solid fuel with high heat value can also be prepared, so that the 'zero emission' and resource full recovery of the photoresist waste liquid are realized, and the treatment cost and environmental risk are significantly reduced.

Disclosed herein are multilayer composite laminates comprising continuous fibers and a polymer matrix comprising a poly(arylene sulfide) (PAS) polymer, a polyetherimide (PEI) polymer, and a polyamide-imide (PAI) polymer.

The application belongs to the field of high dielectric constant (ε r ), low dielectric loss (tan delta) composite dielectric material, and particularly relates to a preparation method of a modified polyether sulfone / polyether imide polymer alloy. g Polymer polyether imide is blended, the mixture is added into DMAc at a solid content of 15%-20%, is stirred and dissolved at 80 DEG C, then a thin film is prepared on a glass plate by using a scraping coating method, finally the glass plate is transferred to a vacuum oven, is kept at 55 DEG C overnight, is kept at 100 DEG C for 3-5 hours, and is cured at 180 DEG C for 3-5 hours, thereby a blended film is prepared, wherein the mass fraction of the modified polyether sulfone in the mixture is 1wt%-30wt%. The modified polyaryl ether sulfone polymer segment with a side chain branched large dipole moment polar group is used as an organic filler, a small amount of addition can greatly reduce the dielectric loss, the operation is simple, the spectrum is good, and the influence on T g is very small, and the dispersion and interface problems of inorganic fillers are avoided.

The invention relates to the technical field of composite boards, in particular to a composite laminated board with excellent flame retardant property and mechanical property. In order to solve the problem that in the prior art, reinforcing layers are all made of carbon fiber materials, and cost is high, the composite laminated board with the excellent flame retardant property and mechanical property is provided and comprises a thermoplastic resin layer, a carbon fiber cloth layer and a glass fiber cloth layer, and the thermoplastic resin layer and the carbon fiber cloth layer are arranged adjacently. The carbon fiber cloth layer and the glass fiber cloth layer are adjacently arranged, and the thermoplastic resin layer comprises polyetherimide and polycarbonate. According to the invention, the glass fiber cloth layer with lower cost is used for replacing part of the carbon fiber cloth layer for compounding to form the composite laminated board, so that the overall manufacturing cost of the composite laminated board is reduced, and meanwhile, the prepared composite laminated board can still maintain relatively ideal performance in flame-retardant effect and mechanical strength.

The invention discloses an anti-biofilm nano composite material added with resveratrol and a preparation method of the anti-biofilm nano composite material. According to the method, ferric trichloride hexahydrate, trisodium citrate, sodium acetate, polyetherimide, resveratrol and hyaluronic acid are used as raw materials, modified magnetic Fe3O4 nanoparticles with positive charges are prepared through a hydrothermal method, carbon dots derived from a resveratrol and hyaluronic acid mixture are introduced, and the magnetic Fe3O4 nanoparticles with positive charges are prepared. The anti-biofilm nano composite material added with the resveratrol is prepared. The nano composite material disclosed by the invention can be attached to a biological membrane, so that the loss is reduced in a transfer process, the effective utilization rate of a medicine is remarkably improved, and excellent magnetic property, antibacterial property and biological membrane resistance are shown.

The application belongs to the field of membrane material preparation, and discloses a preparation method of a natural gas dehydration membrane, the natural gas dehydration membrane and application thereof. The preparation method comprises the following steps: S1, preparing a mixed solution, wherein the mixed solution comprises polyetherimide, water wheel phenol and a solvent; S2, coating the mixed solution obtained in step S1 into a film; S3, placing the film obtained in step S2 on a substrate or a cold table at-10 to-2 DEG C for 1 to 10 min; S4, placing the film obtained in step S3 at a temperature of 30 to 45 DEG C for 2 to 5 min; S5, placing the film obtained in step S4 into a coagulation solution containing 4-methyl catechol for solidification; and S6, placing the film obtained in step S5 into a pyrrole aqueous solution for immersion, thereby obtaining the natural gas dehydration membrane. The natural gas dehydration membrane prepared by the application has high water permeability and a H2O / CH4 separation coefficient, and can be used in the dehydration process before natural gas transportation.

The present application belongs to the field of polymer materials, and particularly relates to a self-toughened epoxy resin with high temperature resistance and a preparation method thereof. The modifier is a multifunctional epoxy resin containing a polyetherimide structure. The modifier is dissolved and blended with a bisphenol A type epoxy resin. The curing agent comprises one or more of methyl nadic anhydride, methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, dodecenyl succinic anhydride and pyromellitic anhydride. The curing accelerator comprises one or more of dimethylaminomethylphenol, ortho-hydroxybenzyl dimethylamine, 2,4,6-tris(dimethylaminomethyl)phenol, triethylamine and triethanolamine. The multifunctional epoxy resin containing a polyetherimide structure not only has good solubility in the bisphenol A type epoxy resin, but also can participate in the curing reaction of the bisphenol A type epoxy resin, so that the toughness and temperature resistance of the bisphenol A type epoxy resin can be significantly improved.

This invention discloses a high-wear-resistant polyetherimide composite material, its preparation method, and its applications. The high-wear-resistant polyetherimide composite material comprises the following components by weight: 60-90 parts polyetherimide, 10-40 parts polyketimide, 1-5 parts antioxidant, 10-20 parts hollow glass microspheres, and 5-10 parts toughening agent. The high-wear-resistant polyetherimide composite material is prepared by compounding the two polymers and simultaneously adding wear-resistant additives. The composite material prepared by this invention achieves a Rockwell hardness of over 105 and possesses excellent mechanical properties, making it suitable for application in high-temperature and wear-resistant aerospace fields.

The application belongs to the field of electrical insulating materials, and discloses a slot insulating material for a low-altitude aircraft motor and a preparation method thereof. The slot insulating material for the low-altitude aircraft motor comprises, from top to bottom, a first insulating paper layer, a film layer and a second insulating paper layer; the first insulating paper layer and the second insulating paper layer are each independently selected from aramid fiber paper or polyaryl sulfone fiber paper; the film layer is selected from one of polyphenylene sulfide film, polyester film, polynaphthalene ester film, polyether ether ketone film or polyetherimide film; wherein, there is no independent adhesive layer between the first insulating paper layer, the film layer and the second insulating paper layer, the first insulating paper layer and the second insulating paper layer are directly combined on the upper and lower surfaces of the film layer through hot pressing, forming a three-layer glue-free composite structure of insulating paper-insulating film-insulating paper, and fundamentally solving the engineering problem that the glue-free composite slot insulating material is prone to paper breakage.

A polymer blend composition including 99.9 to 0.1 weight percent, preferably 99.9 to 10 weight percent, more preferably 99.9 to 30 weight percent of a sulfonated poly(arylene ether), its metal salt, or a combination thereof, preferably the metal salt of the sulfonated poly(arylene ether), and 0.1 to 95 weight percent, preferably 0.1 to 90 weight percent, more preferably 0.1 to 70 weight percent of a poly etherimide; wherein the polymer blend composition has a single glass transition temperature. The polymer blend composition can be used in selectively permeable separation membranes. Alternatively, a selectively permeable separation membrane can include a first polymer layer wherein the polymer is 100 weight percent of a sulfonated poly(arylene ether), its metal salt, or a combination thereof, and a second layer including a polyetherimide, or the blend of the sulfonated poly( arylene ether), its metal salt, or a combination thereof, and the polyetherimide.

The invention belongs to the technical field of aeronautical materials, and particularly relates to a PEI modified material containing a high-temperature composite dispersion system as well as a preparation method and application of the PEI modified material. The PEI modified material containing the high-temperature composite dispersion system provided by the invention is prepared from the following raw materials: polyetherimide resin, titanium dioxide, carbon black and dispersing agents (a coupling agent and polyamide wax). The PEI modified material containing the high-temperature composite dispersion system provided by the invention can realize efficient and uniform dispersion and color regulation and control of pigments in a high-viscosity and strong-polarity system, and has excellent heat resistance, mechanical property and flame retardant property, and interior structural parts prepared from the PEI modified material meet the comprehensive requirements on light weight, attractiveness and durability in the aviation field.

The invention provides a PEI-based multilayer dielectric composite film containing an inorganic interlayer and a preparation method and application thereof.The PEI-based multilayer dielectric composite film comprises a first layer body, a second layer body and a third layer body which are sequentially arranged in a stacked mode, the first layer body and the third layer body are polyetherimide films, and the second layer body is a polyetherimide film. And the second layer body is a ceramic fiber layer formed by sodium bismuth titanate nanofibers as an inorganic interlayer. The outer-layer pure PEI film provides a high eta value for the PEI-based multilayer dielectric composite film and ensures high breakdown field strength (Eb); the epsilon r value of the composite film is enhanced by the middle layer through the intrinsic high dielectric constant of the NBTNFs and micro interface polarization existing in the contact area of the NBTNFs and the PEI. The multilayer structure can effectively combine respective advantages of different layers, obtains high dielectric constant, high breakdown field strength and low dielectric loss, has high energy storage density and high energy storage efficiency, and can be suitable for various application fields.

The application provides a fiber weaving structure dielectric film for a high energy density capacitor and a preparation method, and aims at the fact that the dielectric constant and the breakdown strength of a polymer-based dielectric material are difficult to be simultaneously improved, so that the energy density cannot meet the demand of a high power density energy storage capacitor. A polyetherimide / polyvinylidene fluoride-hexafluoropropylene core-shell structure fiber with a core-shell structure is prepared through a coaxial electrospinning technology, a composite film is formed through laminated hot pressing, the weaving structure is adjusted by adjusting the core-shell fiber composition content, the fiber orientation stacking direction and the stacking layer number, the mechanical strength of the film is enhanced, carriers are captured by deep traps, the breakdown strength is significantly improved, the high dielectric constant is maintained by utilizing interface polarization, and the energy density is comprehensively improved.

The invention discloses a composite dielectric taking polyetherimide as a matrix and a preparation method of the composite dielectric, the composite dielectric comprises the polyetherimide matrix and inorganic filler, and the inorganic filler comprises barium titanate and boron nitride. The barium titanate and the boron nitride are added into the polyetherimide matrix, so that the prepared composite dielectric is uniform in structure distribution, and the dielectric property, the discharge energy density and the breakdown-resistant field strength are greatly improved.

The invention relates to the technical field of dielectric materials, in particular to a polyetherimide dielectric film containing an indane ring structure and a preparation method and application of the polyetherimide dielectric film. The polyetherimide dielectric film containing the indane ring structure is obtained by carrying out polymerization reaction and imidization reaction on diamine monomers containing chain segments shown in the formula I and dianhydride monomers. The polyetherimide dielectric film provided by the invention has relatively high room-temperature and high-temperature breakdown field strength, and also has good high-temperature energy storage performance, and the preparation method is simple and suitable for industrial application. Formula I

The invention discloses a reaction chamber and semiconductor thin film deposition equipment, a spraying plate is arranged in the reaction chamber, a heating unit is arranged above the spraying plate, the reaction chamber comprises a chamber body, an upper cover plate, a first heat insulation unit and a second heat insulation unit, the upper cover plate is located at an opening of the chamber body, and the first heat insulation unit is located in the upper cover plate. The first heat insulation unit covers the outer side of the cavity body, and the second heat insulation unit is located on the outer side of the upper cover plate. Wherein the first heat insulation unit and the second heat insulation unit are polyetherimide. The polyetherimide has low thermal conductivity, can effectively reduce heat transfer, ensures that the chamber body and the upper cover plate are maintained at 180 DEG C and are not influenced by the high temperature of the spraying plate, has good dimensional stability at the high temperature, and avoids deformation or sealing failure caused by thermal circulation; the material does not release particle impurities in a high-temperature environment, so that the pollution risk in the cavity is remarkably reduced, and the strict requirement of a semiconductor process on cleanliness is met.

Disclosed is a method for preparing a polyetherimide film grafted with trihydroxy aminomethane, in which a first mass of trihydroxy aminomethane is dissolved in an aprotic polar solvent under continuous first stirring to obtain a trihydroxy aminomethane solution; a second mass of polyetherimide is dissolved in the trihydroxy aminomethane solution under continuous second stirring to obtain a trihydroxy aminomethane grafted polyetherimide solution; the trihydroxy aminomethane grafted polyetherimide solution is vacuum degassed to obtain a trihydroxy aminomethane grafted polyetherimide casting solution; the trihydroxy aminomethane grafted polyetherimide casting solution is coated on a quartz glass plate using a doctor blade, and after solvent removal through stepwise temperature increase and vacuum drying, a trihydroxy aminomethane grafted polyetherimide film is obtained.

A foamed polymer composition includes a matrix polymer component, and from 0.01 wt % to 2 wt %, based on the weight of the polymer composition, of a nanostructured fluoropolymer, a nanostructured fluoropolymer encapsulated by an encapsulating polymer, or a combination thereof. The matrix polymer component includes polybutylene terephthalate (PBT), polyetherimide (PEI), polyethylene terephthalate (PET), polycarbonate (PC), poly(p-phenylene oxide) (PPO), polystyrene (PS), polyphenylene sulfide (PPS), polypropylene (PP), polyamide (PA), polytrimethylene terephthalate (PTT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), copolymers thereof, or a combination thereof. Methods for forming foamed polymer compositions, including core-back molding methods and extrusion foaming methods, are also described.

A multilayer Janus membrane with directional wettability includes a polyvinylidene fluoride (PVDF) layer, a polyetherimide (PEI) layer and an intermediate layer of copper oxide nanoparticles and vinylidene fluoride and hexafluoropropylene copolymer (PVDF-HFP) or polyacrylonitrile (PAN). The intermediate layer is in contact between the PVDF layer and the PEI layer, and the PEI fibers interlock between the granular particles of the intermediate layer.

The application discloses a kind of PEI or PEEK-based 3D printing wave-absorbing materials and preparation method thereof.The 3D printing wave-absorbing material includes the following components by mass fraction: polyetherimide resin or polyether ether ketone resin: 45~65 parts;Electromagnetic wave absorber: 10~50 parts;Impact modifier: 4~12 parts;Flow aid: 2~8 parts;Antioxidant: 0.5~3 parts;Wherein, the electromagnetic wave absorber includes magnetic absorber and carbon-based absorber, the impact modifier and the carbon-based absorber are pre-coated to form the carbon-based absorber coated with the impact modifier on the surface, and the magnetic absorber is surface modified by silane coupling agent.The application significantly improves the mechanical properties and thermal stability of the material by using specific raw material composition and combining specific multi-layer co-extrusion and online heat treatment process.The preparation process is simple and easy to operate, and is suitable for industrial continuous production.

The invention relates to the technical field of ink preparation, in particular to high-temperature-resistant high-performance PCB character printing ink and a preparation method thereof. The ink comprises a benzoxazine-biphenyl liquid crystal epoxy hybrid prepolymer, an amino-functionalized hexagonal boron nitride nanosheet, a polysiloxane coated ZIF-8 packaged rare earth aluminate heat-resistant pigment, a hyperbranched polyetherimide diluent and a composite wall material microencapsulated dicyandiamide curing agent, the invention relates to a graphene quantum dot modified montmorillonite rheological regulator and a composite stabilizer. The preparation method comprises the following steps: optimized pre-dispersion, self-assembly and phase separation, stepped curing and post-treatment. Through the synergistic effect of all the components and unique process control, the high temperature resistance, adhesive force and yellowing resistance of the ink are remarkably improved, a cured film layer of the ink can tolerate the high temperature of 300 DEG C for a long time, and the ink has excellent printability and line width precision and is suitable for character identification of a high-reliability PCB.

The invention relates to a polymer-based solid-state electrolyte membrane, a manufacturing method thereof, and a solid-state electrolyte battery capable of being used at high temperature. The polymer-based solid electrolyte membrane comprises a heat-resistant polymer nanofiber membrane, an electrolyte material for impregnating and / or coating the heat-resistant polymer nanofiber membrane, and a lithium salt, the heat-resistant polymer nanofiber membrane is formed into a membrane shape through free interweaving of fibers of a heat-resistant polymer, and the heat-resistant polymer is selected from at least one of polyacrylonitrile, polyvinylpyrrolidone, polyvinyl alcohol, polyetherimide, aromatic polyamide, polyphenylene ether and polyaryletherketone. The electrolyte material is in a solid state and is selected from at least one of polyethylene oxide or polyethylene glycol diamine. The solid electrolyte battery according to the present invention comprises a positive electrode, a negative electrode, and a solid electrolyte membrane interposed between the positive electrode and the negative electrode, the solid electrolyte membrane comprising the polymer-based solid electrolyte membrane.

The invention relates to the technical field of high polymer materials, in particular to a preparation method of polyetherimide. Specifically, the preparation method comprises the following steps: adding a first monomer into a high-pressure reaction kettle, filling nitrogen to replace air, and then boosting and heating to melt the material; the preheated molten second monomer is added into the reaction kettle in multiple times, the temperature is increased by 10-30 DEG C every time 10% of the molar weight of the second monomer is added, and the final temperature is increased to 350-500 DEG C; after charging is completed, carrying out heat preservation reaction, then exhausting and reducing pressure at 330-380 DEG C, and then increasing the pressure to 0.4-0.6 MPa again; and finally, extruding, cooling and granulating the molten material. Wherein one of the first monomer and the second monomer is aromatic diether anhydride, and the other one is diamine; the PDI value of the polyetherimide is 2.0 to 2.2. The method realizes solvent-free polymerization, has the advantages of narrow molecular weight distribution of the product, low residual amino-terminated group, good high thermal oxidation stability and light color, and is suitable for workpiece production in the fields of aerospace, electronics and the like.

The invention discloses a carbon fiber polyimide sizing agent and a preparation method and application thereof, the carbon fiber polyimide sizing agent is suitable for a carbon fiber reinforced polyether-ether-ketone (CF / PEEK) composite material, and belongs to the field of composite materials, and the specific scheme is as follows: the amphiphilic water-based polyetherimide sizing agent comprises polyamide acid, an organic solvent, deionized water and organic weak base. The polyamide acid (PAA) is a precursor of polyetherimide (PEI), and the molecule of the polyamide acid contains two chain segments: active side group hydroxyl (-OH) is contained, so that the activity of the sizing agent is remarkably enhanced, and the surface energy of the carbon fiber is favorably increased; the sizing agent contains an ether-ether-ketone-like structure, and a fragment similar to a PEEK structure is introduced according to a similar compatibility principle, so that the compatibility of the sizing agent and a PEEK resin matrix is enhanced, the stress transfer efficiency at an interface is enhanced, and the interface performance of a composite material is improved. Meanwhile, in order to respond to the environment-friendly requirement, polyamide acid (PAA) is used as a matrix, deionized water is used as a dispersing agent, and the environment-friendly water-based sizing agent is prepared.

The invention relates to the technical field of thin-film capacitor materials, and discloses a temperature-adaptive thin-film capacitor material and a manufacturing method thereof, and the temperature-adaptive thin-film capacitor material comprises a polyetherimide substrate thin film as a substrate support and barium titanate potassium niobate composite ceramic particles, the barium titanate potassium niobate composite ceramic particles are uniformly distributed in the polyetherimide substrate film in a discrete mode, the polyetherimide substrate film internally contains a dispersing agent and an antioxidant, and the dispersing agent is distributed in a PEI molecular chain of the polyetherimide substrate film and in an interface area of the barium titanate potassium niobate composite ceramic particles. And antioxidant molecules are uniformly embedded among PEI molecular chains of the polyetherimide substrate film and cannot be chemically bonded with PEI and the composite ceramic particles. According to the temperature self-adaptive thin film capacitor material and the manufacturing method, compatibility is improved, agglomeration is prevented, and dielectric loss is reduced; the antioxidant is embedded into a PEI molecular chain, oxidative degradation of the PEI molecular chain is inhibited, long-term stability is guaranteed, loss is reduced, the service life is prolonged, and product consistency is guaranteed.

A coated cooking element for a kitchen utensil or electrical cooking appliance includes a metal substrate coated, on at least one face, with a single layer which, by one of its faces, is in contact with the metal substrate and one of the faces of which forms a cooking face. The layer includes one or more silicone resins, one or more heterocyclic thermoplastic polymers selected from the group consisting of polyetherimides, polyimides), polyamide imides, and polybenzymidazole, and optionally one or more aromatic thermoplastic polymers, one or more fillers and / or one or more additives and / or one or more coloring agents; a process for manufacturing same, a kitchen utensil or an electrical cooking appliance including same.

The invention discloses a high-temperature-resistant insulating material as well as a preparation method and application thereof, and belongs to the technical field of functional polymer composite materials and preparation thereof. The high-temperature-resistant insulating material solves the problems that the insulating property of an existing high-temperature-resistant insulating material is degraded at the temperature of 150 DEG C, and the performance of the existing high-temperature-resistant insulating A-CF3 group is introduced into polyetherimide, a mesoscopic sequential phase structure with continuous periodicity is induced for the first time by utilizing the steric hindrance effect and the electrostatic repulsion effect of the polyetherimide, and the limitation of a traditional crystal-amorphous binary structure is broken through. Furthermore, the stability of the mesoscopic sequential phase is enhanced through a topological cross-linking agent (HTP), a density heterostructure is formed by the mesoscopic sequential phase structure and a short-range ordered domain to remarkably inhibit carrier migration, and the ultrahigh insulation performance of 800 MV / m or above is achieved at the temperature of 150 DEG C.