116 results about "Diphenyl sulfone" patented technology

The invention belongs to the field of sulfone polymer materials, and particularly relates to a sulfone polymer with narrow molecular weight distribution and low gel content and a preparation method thereof. The preparation method comprises the following steps: 1) adding an organic bisphenol compound, 4, 4 '-dichlorodiphenyl sulfone, a salt-forming agent and a purified aprotic polar solvent into a reactor, uniformly stirring and mixing the system, then carrying out deoxygenization operation, and controlling the oxygen content in the system to be less than or equal to 100ppm; and 2) after the replacement is completed, introducing inert gas (such as nitrogen) into the system for a long time, and carrying out two-stage heating reaction under the condition to obtain a viscous sulfone polymer solution. The molecular weight distribution of the sulfone polymer is less than 3, and the gel structure content is greater than 0 and less than 3 mol%. The oxygen content in a reaction system is reduced, and generation of polymer free radicals is reduced, so that the gel structure content is controlled, and the linear sulfone polymer material with narrow molecular weight distribution is obtained.

The invention discloses a single-component high-heat-resistance type epoxy adhesive and a preparation method of the single-component high-heat-resistance type epoxy adhesive. The adhesive is prepared from the following components in parts by weight: 30 to 40 parts of N, N-4, 4 '-diphenylmethane bismaleimide; 50 parts of bisphenol F epoxy resin; 36.47 parts of 4, 4 '-diaminodiphenyl sulfone; 20 to 40 phr of phenyl glycidyl ether; 1 to 2 phr of two terminal type epoxy silicone oil; 4 to 6 phr of hydroxyl-terminated polyether sulfone; 10 to 20 phr of boron nitride, the surface of which is modified by gamma-glycidyl ether oxypropyl trimethoxy silane; and 1 to 3 phr of an adhesion promoter. According to the adhesive disclosed by the invention, the heat resistance, the mechanical property, the dimensional stability, the process adaptability and the like are synergistically improved, the use requirements of an aviation structural part on long-term service at 150-180 DEG C and an electronic packaging device on the condition of short-time reflow soldering at about 200 DEG C can be met, and the reliability of the adhesive in a high-temperature environment is remarkably improved.

The invention discloses a polyarylether sulfone polymer and a preparation method and application thereof. The preparation method of the polyarylether sulfone polymer comprises the following steps: carrying out condensation polymerization on a bisphenol compound and a dihalogen diphenyl sulfone derivative, boiling, washing and drying to obtain polyarylether sulfone resin. According to the polyarylether sulphone resin disclosed by the invention, by introducing benzoyl, the conjugation degree of a main chain of a polymer is increased, and the rigidity of the main chain is improved, so that the polyarylether sulphone resin has good thermal stability and dimensional stability; meanwhile, the hydrophilicity of the resin is improved due to the increase of carbonyl. The development and utilization prospects in the fields of sewage treatment, gas separation, solid electrolyte, battery diaphragms and the like are very wide. The invention aims to provide a novel high-temperature-resistant hydrophilic polyarylether sulfone resin and a preparation method thereof, i.e., a benzoyl group is introduced into a main chain structure of polyarylether sulfone, so that the structural rigidity of a polymer is improved, and the hydrophilicity is increased.

The invention belongs to the technical field of polymer chemical production, and discloses a method for continuously and efficiently preparing polyether-ether-ketone. The method comprises the following steps: dissolving 4, 4 '-difluorobenzophenone and diphenyl sulfone in a first dissolving tank to obtain a 4, 4'-difluorobenzophenone solution; hydroquinone, a catalyst and diphenyl sulfone are placed in a second dissolving tank to be dissolved, and a hydroquinone solution is obtained; the preparation method comprises the following steps: injecting a 4, 4 '-difluorobenzophenone solution and a hydroquinone solution into a reactor for polymerization reaction to obtain a mixed solution; injecting the mixed solution into a separator through a heat exchanger for separation to obtain polyether-ether-ketone and liquid; distilling the liquid to obtain diphenyl sulfone and sodium fluoride, and returning the obtained diphenyl sulfone to participate in dissolution; all the steps are carried out in a protective atmosphere. The preparation process provided by the invention is a brand new PEEK production process flow, and realizes continuous PEEK production and efficient energy recycling.

The invention discloses a precise construction strategy of a dibenzothiophene sulfuryl covalent organic framework material and systematically explains efficient application of the dibenzothiophene sulfuryl covalent organic framework material in photocatalytic synthesis of thiadiazole and derivatives thereof. The achievement relates to a plurality of leading subjects such as catalytic chemistry, organic synthesis, material science, environmental engineering and green chemistry. According to the method, 2, 4, 6-triformyl phloroglucinol and 3, 7-diaminodibenzo [b, d] thiophene-5, 5-dioxide are taken as construction units, and the crystalline S-COF rich in sulfuryl active sites can be quantitatively obtained through topology-oriented Schiff base condensation under the conditions of protonic acid catalysis, no water and no oxygen. Under the radiation condition of visible blue light, S-COF is used as a heterogeneous photocatalyst to drive green synthesis of 3, 5-di-p-tolyl-1, 2, 4-thiadiazole and series of derivatives thereof; the invention provides a new catalyst design normal form for light-induced organic conversion, and lays a solid foundation for sustainable development-oriented efficient synthesis chemistry.

The invention relates to the technical field of nylon, and discloses a preparation method of a wear-resistant modified nylon plastic, which comprises the following steps: reacting acylating chlorinated carbon nanotubes with diphenyl sulfone-based nylon, and carrying out melt blending and extrusion on the obtained product and nylon 6 resin in an extruder to obtain the wear-resistant modified nylon plastic. In the reaction process of the diphenyl sulfone-based nylon, the active imino group of the diphenyl sulfone-based nylon reacts with the acyl chloride group on the surface of the carbon nano tube, so that a nylon 6 molecular chain is introduced to the surface of the carbon nano tube, the diphenyl sulfone-based nylon can play a role of a compatilizer, the compatibility between the carbon nano tube and nylon 6 resin is improved, and the service life of the carbon nano tube is prolonged. The carbon nanotubes are uniformly dispersed in the nylon 6 resin plastic, so that a better reinforcing effect is achieved, the tensile strength, the elongation at break and the bending strength of the nylon plastic are obviously improved, the mass abrasion loss of the nylon plastic is reduced, the wear resistance is improved, and meanwhile, the uniformly dispersed carbon nanotubes can improve the thermal stability of the nylon plastic.

The invention provides a method for preparing sulfonated polyetheretherketone, and belongs to the technical field of polycondensates of ketone and phenol. The preparation method comprises the following steps: preparing modified polyether-ether-ketone, pretreating, sulfonating and post-treating. The method for preparing the modified polyether-ether-ketone comprises the following steps: under the protection of nitrogen, adding 4, 4 '-difluorobenzophenone, hydroquinone and diphenyl sulfone into a reaction kettle, heating to 170-190 DEG C, adding a catalyst, keeping the temperature for 0.8-1.2 hours, dropwise adding a PEG-400 solution at 260-290 DEG C, controlling the dropwise adding time to be 1.5-2.5 hours, reacting at 310-330 DEG C for 1.5-3.5 hours after dropwise adding is finished, cooling and crystallizing after the reaction is finished, and washing off a solvent and inorganic salt to obtain the modified polyether-ether-ketone. Modified polyether-ether-ketone is obtained; according to the sulfonated polyether-ether-ketone disclosed by the invention, the sulfonation degree is 69.6 to 75.1 percent, the sulfonation uniformity is good, and the deviation is 2.37 to 2.52 percent.

The invention provides a polymer and a preparation method and application thereof, the preparation method comprises the following steps: 1, mixing dopa and / or dopamine with an organic solvent, and adding an organic alkali and a silane compound to obtain a first intermediate product; 2, mixing the first intermediate product with an organic solvent, adding a pH regulator, and carrying out a stirring reaction to obtain a second intermediate product; 3, mixing a diphenyl sulfone compound with an organic solvent, adding the second intermediate product, and stirring for reaction to obtain a third intermediate product; 4, mixing the third intermediate product with an organic solvent, and adding ammonium salt to obtain a fourth intermediate product; and 5, mixing the fourth intermediate product, bisphenol A and an organic solvent, adding an inorganic base, and carrying out a stirring reaction to obtain the polymer. When the polymer is used for preparing the alkaline water electrolysis composite membrane, the wettability of the composite membrane and electrolyte can be improved, the surface resistance of a diaphragm is reduced, and the electrolytic efficiency and mechanical stability of the diaphragm are improved.

The invention discloses an MXene-coated PZS-C gel structure membrane electrode as well as a preparation method and application thereof, and belongs to the technical field of electrochemical uranium removal. Carrying out etching stripping or etching intercalation stripping on the MAX powder to form an MXene nanosheet suspension; the preparation method comprises the following steps: dissolving phosphonitrilic chloride trimer and 4, 4-dihydroxy diphenyl sulfone, adding triethylamine, and carrying out condensation reaction under the ultrasonic action to obtain microspherical PZS; the preparation method comprises the following steps: stirring and mixing an MXene nanosheet suspension and microspherical PZS, depositing the mixture on a substrate in a vacuum-assisted filtration manner to form a membrane body, and carrying out vacuum freeze drying and calcination on the membrane body to obtain the MXene-coated PZS-C gel structure membrane electrode which has good stability, fully exposes active sites, is used for electrochemical separation of uranyl ions, and has a good application prospect in electrochemical separation of uranyl ions. The maximum removal amount of the material reaches up to 3375.44 mg / g and is generally higher than that of other electrochemical uranium removal materials, and the material has a good application prospect.

The invention provides a preparation method of polyaryletherketone resin for a 3D printing material, and relates to the technical field of high polymer materials, the polyaryletherketone resin is prepared by taking 4, 4-difluorobenzophenone, hydroquinone, biphenol and bisphenol fluorene as reaction raw materials, taking diphenyl sulfone as a solvent and taking carbonate of alkali metal as a catalyst through nucleophilic polycondensation reaction; the material has the advantages of high melting point, high glass transition temperature, high thermal decomposition temperature and low crystallization speed. According to the preparation method provided by the invention, a certain amount of bisphenol fluorene is added at the later stage of a polymerization reaction, so that on one hand, the introduction of a fluorenyl structure can further destroy the regularity of a molecular chain and reduce the crystallinity and the crystallization speed; on the other hand, the fluorenyl structure can be used for hindering chain segment movement, and the resin melting point can be increased.

The utility model discloses a kind of polysulfone granular material washing devices, relate to polysulfone production equipment technical field.Polysulfone granular material washing device, including washing kettle, heat preservation device and washing liquid circulating device, the upper portion of washing kettle is provided with feed inlet, top is provided with eluent outlet, bottom is provided with washing liquid inlet, the lower portion in washing kettle is provided with first perforated plate, upper portion is provided with second perforated plate, second perforated plate can be moved back and forth along the axial direction of washing kettle;Heat preservation device is set on washing kettle;Washing liquid circulating device includes the cooler, solid-liquid separator, washing liquid tank, circulating pump and heater connected in sequence.The technical scheme of the utility model adopts the mode of ethanol countercurrent circulation flow to wash polysulfone granular material in washing kettle, and when washing, limit the polysulfone granular material to be washed between first perforated plate and second perforated plate, can more fully elute diphenyl sulfone on polysulfone granular material, guarantee the washing effect.

Provided is a polyimide including: a dianhydride monomer including at least one selected from the group consisting of 3, 3 ', 4, 4'-benzophenone tetracarboxylic acid dianhydride (BTDA), oxybis-phthalic anhydride (ODPA), 4, 4 '-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), and 3, 3', 4, 4 '-diphenylsulfone tetracarboxylic acid dianhydride as polymerization units, and a diamine monomer including at least one selected from the group consisting of 3, 3', 4, 4 '-benzophenone tetracarboxylic acid dianhydride (BTDA), oxybis-phthalic anhydride (ODPA), 4, 4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), and 3, 3 ', 4, 4'-diphenylsulfone tetracarboxylic acid dianhydride as polymerization units; the diamine monomer comprises 4, 4 '-methylenebis (2, 6-diethylaniline) (MEDA).

The invention discloses corrosion-resistant waterproof aluminum foil glass fabric and a preparation method thereof, and belongs to the technical field of aluminum foil composite glass fabric. The corrosion-resistant waterproof aluminum foil glass fabric sequentially comprises a waterproof glass fabric, a high-temperature-resistant adhesive layer and an aluminum foil from bottom to top, the waterproof glass fabric is obtained by padding a waterproof finishing agent; the waterproof finishing agent is mainly prepared from the following raw material components: a silane coupling agent, hydroxyl-terminated fluorine-containing dihydric alcohol, isophorone diisocyanate and polycaprolactone; the high-temperature-resistant adhesive is mainly prepared from the following raw material components: 4, 4 '-oxydiphthalic anhydride, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 3, 3'-diaminodiphenyl sulfone, 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane, 4-amino-2-hydroxybenzaldehyde and o-phenylenediamine, and the high-temperature-resistant adhesive is prepared from the following raw material components: 4, 4 '-oxydiphthalic anhydride, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 3, 3'-diaminodiphenyl sulfone, 1, 3-bis (3-aminopropyl) The corrosion-resistant waterproof aluminum foil glass fiber cloth prepared by the invention is relatively good in high temperature resistance, corrosion resistance and waterproofness.

The invention relates to the field of application of dielectric energy storage materials, and discloses application of a polyimide film in a dielectric energy storage material. The polyimide is prepared by copolymerizing bis [4-(4-aminophenoxy) phenyl] sulfone and 4, 4 '-(hexafluoroisopropene) diphthalic anhydride, or copolymerizing bis [4-(3-aminophenoxy) phenyl] sulfone and 4, 4'-(hexafluoroisopropene) diphthalic anhydride, or copolymerizing bis [4-(3-aminophenoxy) phenyl] sulfone and 4, 4 '-(hexafluoroisopropene) diphthalic anhydride. Ether bonds are introduced to two sides of diphenyl sulfone to destroy a continuous conjugated structure between an imide ring and diphenyl sulfone, hexafluoroisopropylene with high electronegativity is introduced into a dianhydride unit, and high-temperature insulativity is improved through interaction of the three. When the prepared polyimide film is used as a dielectric medium energy storage material, the high-temperature insulation property is improved while the heat resistance and the relatively high dielectric constant are maintained, so that the energy storage property of a capacitor is improved. The discharge energy density of 7.25 J / cm < 3 > and 4.79 J / cm < 3 > is realized at 200 DEG C and 250 DEG C respectively, and the efficiency is greater than 90%.

The invention belongs to the field of polyamide products, and discloses cooking-resistant polyamide as well as a preparation method and application thereof. The polyamide is formed by polymerizing the following components: X is alicyclic diamine 3, 3 '-dimethyl-4, 4-diamino dicyclohexylmethane or a derivative of the alicyclic diamine 3, 3'-dimethyl-4, 4-diamino dicyclohexylmethane with a substituent group on a cyclohexyl group; according to the present invention, Y is 4, 4 '-diaminodiphenyl sulfone or a derivative having a substituent group on the benzene ring thereof, and Z is aliphatic diacid.Compared with the traditional long-chain nylon and alicyclic nylon such as TR90, the polyamide PA XZ / YZ and the composition thereof have advantages of high glass transition temperature, high temperature resistance, high boiling resistance, low water absorption, and high toughness.

The invention discloses a polysulfone product and a preparation process thereof, and relates to the technical field of polysulfone production. The preparation process of the polysulfone product comprises the following steps: preparing polysulfone mucilage; diluting the polysulfone mucus with molten diphenyl sulfone, and filtering to obtain a polysulfone polymer solution; the method comprises the following steps: adding a polysulfone polymer solution into disturbed and circularly flowing ethanol, curing the polysulfone polymer solution to form a linear solid, and crushing and filtering the linear solid to obtain polysulfone solid powder; and carrying out countercurrent washing on the solid powder by using hot ethanol, and drying to obtain a polysulfone product. According to the technical scheme provided by the invention, the polysulfone polymer liquid obtained by filtration is added into the disturbed and circularly flowing ethanol, the polysulfone polymer liquid can be sufficiently cured to form the linear solid, and the size distribution range of the formed linear solid is concentrated, so that the burden of crushing treatment is reduced. And during countercurrent washing, the solid powder is limited, so that the countercurrent hot ethanol can sufficiently wash the solid powder.

The invention provides polyether sulphone and a preparation method thereof. The preparation method comprises the following steps: mixing a polar aprotic solvent, a bisphenol monomer and an alkaline substance, introducing protective gas, heating, dehydrating, cooling to T1, adding a diphenyl sulfone monomer, and carrying out heat preservation at T1 to carry out a first-stage polymerization reaction; adding a low-polarity solvent, heating to T2, and carrying out second-stage polymerization reaction to obtain polyether sulfone; wherein the low-polarity solvent is selected from one or a combination of more than two of normal hexane, cyclohexane, methylbenzene, ethylbenzene, biphenyl and diphenyl ether. By reducing or partially inhibiting the generation of the cyclic oligomer in the reaction process, the polyarylether sulfone with narrow molecular weight distribution and low content of the cyclic polymer is obtained. The method provided by the invention is simple and easy to implement, is convenient to control, avoids complex product purification and separation processes, and is beneficial to industrial implementation.

The invention relates to the technical field of organic luminescence, and discloses a binaphthylamine derivative as well as a preparation method and application thereof. According to the organic compound based on the binaphthylamine derivative, a series of D-A structure molecules are synthesized by taking a binaphthylamine-containing group as a donor structure and connecting different diphenyl sulfone derivative receptors, and the organic compound has relatively high quantum yield and can be applied to the fields of organic electroluminescent devices, fluorescent probes, asymmetric catalysis, information storage and the like.

The invention belongs to a resin fiber layered product, and particularly relates to a light-weight high-warm-keeping down jacket fabric and a preparation method of the light-weight high-warm-keeping down jacket fabric. The preparation method comprises the following steps: preparing a modifier from 4, 4 '-diaminodiphenyl sulfone and phenylphosphoryl dichloride as raw materials, mixing the modifier with caprolactam, carrying out a polymerization reaction, carrying out melt spinning and weaving to obtain a modified nylon base cloth layer, forming an electrospun layer on the modified nylon base cloth layer through emulsion electrostatic spinning, and finally carrying out vacuum freeze drying to obtain the down jacket fabric. The light and thin performance and high warm keeping performance of the fabric can be guaranteed, and the breaking strength can be improved.

The invention discloses a medical-grade modified PEEK composite material and a preparation method thereof. The preparation method comprises the following steps: S1, dispersing a bioactive material into dissolved diphenyl sulfone, and heating until a solvent is volatilized to obtain a bioactive material / diphenyl sulfone composite material; s2, adding the bioactive material / diphenyl sulfone composite material into a reaction kettle, heating in an inert atmosphere until diphenyl sulfone is molten, adding sodium carbonate, difluorobenzophenone and hydroquinone, and continuously heating for reaction; s3, heating a polymerization product in S2, and then cooling to 250-260 DEG C; and when the temperature is reduced to 250 DEG C, naturally cooling, and pulverizing the obtained sample by a pulverizer. The preparation method comprises the following steps: firstly preparing a bioactive material / diphenyl sulfone composite material, and in a PEEK polymerization reaction process, adding nano particles as effective nucleation sites, and growing a PEEK polymer by taking the nano particles as crystal nucleuses, so that steric resistance potential energy exists among the particles, thereby enlarging potential barriers among the particles and effectively reducing the agglomeration phenomenon of the nano particles.

The present application relates to the technical field of resin composition, in particular to a preparation method of high-performance low-dielectric high-frequency copper-clad plate resin composition. The method uses 4,4'-diamino diphenyl methane and 4,4'-diamino diphenyl sulfone to react with maleic anhydride respectively to synthesize a composite bismaleimide, then reacts with acetic anhydride and triethylamine respectively, purifies, and finally mixes with styrene modified polyphenyl ether, hydrocarbon resin, triblock copolymer, olefin crosslinking agent, vinyl silane modified spherical silica, flame retardant and the like according to a specific proportion, and stirs in batches to obtain a target composition. The system synergistically regulates the molecular structure through rigidity-flexibility, combines with surface modified inorganic fillers, significantly improves the high-frequency dielectric properties, heat resistance and copper foil peeling strength, has the advantages of low dielectric loss, high dimensional stability, heat resistance, high interface peeling strength and the like, and is suitable for large-scale application of high-frequency high-reliability PCB substrates.

The present application relates to a kind of resin composition and its preparation method and application, the resin composition includes the following components according to weight parts: phenoxy resin 50-80 weight parts, epoxy resin 10-40 weight parts, toughening agent 5-20 weight parts and amine curing agent 5-15 weight parts;The epoxy resin includes the combination of difunctional epoxy resin and multifunctional epoxy resin;The mass percentage content of difunctional epoxy resin in the epoxy resin is 10-40%;The toughening agent includes any one or the combination of at least two in carboxyl polyester, carboxyl polyurethane or core-shell rubber;The amine curing agent includes any one or the combination of at least two in dicyandiamide, 4,4' diamino diphenyl sulfone, 3,3' diamino diphenyl sulfone or 4,4' diamino diphenyl methane.The present application can improve the fatigue resistance and bending resistance of covering film by designing the components of resin composition.

The invention discloses a thianthrene derivative-based thermally activated delayed fluorescent material as well as a synthesis method and application thereof. The thermally activated delayed fluorescent material has a structural general formula as shown in a formula I, wherein R is a cyanobenzene group, a benzophenone group or a diphenyl sulfone group; r'is a structural group shown in the specification. The thianthrene derivative-based thermally activated delayed fluorescent material shows a highly twisted molecular structure, has a small energy gap difference, accelerates the RISC process, and achieves 100% theoretical internal quantum efficiency. Due to the introduction of two donor units of carbazole and thianthrene, the overall molecular weight is increased, and the solubility is enhanced, so that the compound is very suitable for wet process preparation. When the organic electroluminescent material is applied to an OLED device, emission from green light to blue light is shown, and excellent electroluminescent performance is shown.

The present invention belongs to the technical field of polyimide composite film manufacturing, and in particular to a transparent thermoplastic polyamic acid resin, a transparent thermoplastic composite film, and its preparation method and application. The transparent thermoplastic polyamic acid resin includes a diamine monomer and a dianhydride monomer; the diamine monomer is a mixture of 2,2'-bis(trifluoromethyl)-4,4'-bis(4-aminophenylcarbonylamino)biphenyl and 4,4'-bis(3-aminophenoxy)diphenyl sulfone; the dianhydride monomer is a mixture of 2,3,3',4'-diphenyl ether tetracarboxylic dianhydride and p-phenylene-bis(triphenylene)diamine dianhydride. The transparent thermoplastic composite film provided by the present invention has both excellent light transmittance and excellent peel strength.

The invention relates to the technical field of layered composite fabrics, in particular to an antibacterial wear-resistant multi-layer composite fabric and a preparation process thereof. The invention relates to a preparation process of an antibacterial wear-resistant multilayer composite fabric. The preparation process comprises the following steps: preparing surface modified nano silicon dioxide; preparing an antistatic additive; preparing an outer-layer fabric; preparing an inner layer fabric; and preparing the multi-layer composite fabric. The preparation method comprises the following steps: aminating the surface of nano silicon dioxide by using a silane coupling agent, and grafting 4, 4 '-dihydroxy diphenyl sulfone and hexachlorocyclotriphosphazene to the surface of the aminated nano silicon dioxide by using triethylamine as an acid-binding agent, so that the nano silicon dioxide can be promoted to be uniformly dispersed in a polyester matrix; according to the present invention, the modified nano-silica is added into the polyester fiber, such that the compatibility of the nano-silica and the polyester matrix is improved, the combination is firm, the nano-silica does not easily fall off during repeated friction so as to effectively improve the wear resistance of the outer layer fabric, and the modified nano-silica is dispersed in the polyester fiber so as to effectively improve the flame retardant property of the outer layer fabric.

The application discloses a display screen functional film and a preparation method and application thereof, and belongs to the technical field of functional film materials. The method comprises the following steps: S1, SiO2 nanoparticles, ethanol, acetonitrile, polyvinylpyrrolidone and deionized water are mixed, and ultrasonic dispersion is carried out to obtain a dispersion liquid; tetrabutyl titanate is slowly added into the dispersion liquid, heating and stirring are carried out, and washing, drying and annealing are carried out to obtain SiO2@TiO2 particles; the SiO2@TiO2 particles, an epoxy-containing silane coupling agent and methanol are mixed, heating and stirring are carried out, and washing, drying and annealing are carried out to obtain modified SiO2@TiO2 particles. S2, the modified SiO2@TiO2 particles, 4,4'-diamino diphenyl sulfone and a leveling agent are dispersed in methyl isobutyl ketone, mixing is carried out, ultrasonic defoaming is carried out, and a coating is obtained; the coating is uniformly coated on an optical film, and the functional film with good light transmission, ultraviolet resistance and hydrophobicity is obtained after temperature rising and drying.

The invention discloses a chlorine-free etching agent for a photovoltaic printing tungsten steel mesh and a preparation method and application of the chlorine-free etching agent for the photovoltaic printing tungsten steel mesh, and the chlorine-free etching agent for the photovoltaic printing tungsten steel mesh comprises the following components in percentage by weight: 0-2.5% of o-aminophenol sulfonic acid; 0 to 3% of diphenyl sulfonyl-4, 4 '-difluoro-3, 3'-disodium disulfonate; 0 to 1.2 percent of 2, 5-bis (methylsulfonyl)-1, 4-phenylenediamine; 0.5 to 2% of 2, 5-dimethyl phenyl thiourea; 0.2 to 3% of 5-(difluoromethoxy)-2-sulfydryl-1H-benzimidazole, and the balance of water; 0 to 2% of a hydroxyl-terminated vinyl pyrrolidone-styrene copolymer; 33-70% of an acidic etching main agent; the acidic etching main agent is a mixture of nitric acid, hydrofluoric acid and phosphoric acid. According to the etching solution, through the synergistic effect of all the components, the effect that the diameter of the tungsten steel mesh is accurately etched from 10 micrometers to 6 micrometers at the normal temperature is achieved, and the smoothness and brightness of the surface of the etched tungsten steel mesh are considered.

The invention relates to a preparation method of a hollow fiber gas separation membrane for decarburization of oilfield associated gas, and belongs to the technical field of separation membranes, and the preparation method specifically comprises the following steps: mixing 4, 4 '-diaminodiphenyl sulfone with diamine under the protection of argon, and then adding a solvent N, N-dimethylacetamide; after diamine is completely dissolved, dianhydride is added in batches until a polyamide acid prepolymer solution is obtained through stirring; adding a dehydrating agent and a catalyst into the polyamide acid prepolymer solution to generate a polyimide solution; the preparation method comprises the following steps: mixing dianhydride with sulfuryl-containing diamine, then adding the sulfuryl-containing diamine into a reaction solution, then pouring the reaction solution into a precipitant methanol to separate out a polymer, washing and drying to obtain a polyimide solid, then preparing the polyimide solid into a membrane casting solution, and carrying out a spinning process to obtain the hollow fiber gas separation membrane. And the hollow fiber gas separation membrane is prepared by spinning, so that the molecular chain structure is optimized, and the comprehensive performance of the material is improved.

The application relates to the paint technology field and discloses a high-temperature-resistant paint and a preparation method thereof. Epoxy resin, a filler, a dispersing agent and a defoaming agent are added into a solvent, a curing agent is added after stirring, and the high-temperature-resistant paint is obtained. The curing agent is composed of a polyamide curing agent and UPy diamino diphenyl sulfone; UPy structure forms stable quadruple hydrogen bond action in the molecular chain bond of the epoxy resin, the crosslinking density of the epoxy resin is improved, when the epoxy resin is stressed, the quadruple hydrogen bond can be broken by absorbing energy at the same time, stress can be consumed and energy can be transmitted, the paint curing product is not damaged by stress, has good toughening effect, and the toughness of the paint film is improved. The heat-resistant diphenyl sulfone structure is introduced into the molecular chain of the epoxy resin, the high-temperature-resistant performance of the paint is improved, and the paint has higher thermal decomposition temperature.

This invention discloses polyimide, its preparation method, and polyester electronic adhesive. This invention provides a polyimide whose polymerizing monomers include dianhydride monomers and diamine monomers, wherein the dianhydride monomer is selected from one or more of 4,4'-(4,4'-isopropyldiphenoxy)bis(phthalic anhydride), 3,3',4,4'-benzophenone tetracarboxylic dianhydride, 4,4'-oxybis(phthalic anhydride), and 2,3,3',4'-biphenyltetracarboxylic dianhydride; and the diamine monomer is selected from one or more of aminophenyl sulfone, 1,3-bis(4'-aminophenoxy)benzene, 2,2'-bis[4-(4-aminophenoxyphenyl)]propane, 4,4'-bis(3-aminophenoxy)diphenyl sulfone, 1,3-cyclohexanedimethylamine, 4,4'-diaminodiphenyl ether, dimericadiamine, and trimericadiamine. The polyimide of this invention can modify polyester or epoxy systems, significantly improving flame retardancy and adhesive peel strength. The coating process involves evaporation at relatively low temperatures, and the solvent in the system has a low boiling point, meeting the requirements of existing processes.