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39 results about "Cross linked membrane" patented technology
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Efficient anticorrosive paint and preparation method thereof
The invention discloses an efficient anticorrosive coating and a preparation method thereof, and relates to the technical field of coatings. The high-efficiency anticorrosive paint is prepared from a crosslinked membrane modified phytic acid loaded aluminum MCM-41 mesoporous silica composite synergistic filler, a polyurethane / epoxy resin composite emulsion system, titanium dioxide, a BYK-190 dispersing agent, a BYK-021 defoaming agent, a BYK-358N flatting agent, a BYK-425 thickening agent, hydroxyethyl cellulose and deionized water. A cross-linked membrane modified phytic acid loaded aluminum MCM-41 mesoporous silica composite synergistic filler is uniformly dispersed and deeply embedded into a polyurethane / epoxy resin composite emulsion system, countless chemical anchor points are established between the filler and a base material, and the interface bonding property with a resin system is also enhanced, so that the adhesive force of the coating is greatly improved, and meanwhile, the coating has the advantages that the service life of the coating is prolonged, and the service life of the coating is prolonged. And an active and passive three-dimensional protection system formed by the two is used for remarkably improving the corrosion resistance of the coating in the action modes of intelligent response, active repair and physical barrier.
Owner:LANZHOU PETROCHEMICAL VOCATIONAL & TECH UNIV
Ultrathin swelling-resistant GO (graphene oxide) cross-linked membrane as well as preparation method and application thereof
The invention provides an ultrathin swelling-resistant GO cross-linked membrane as well as a preparation method and application thereof, and belongs to the technical field of nanofiltration separation membrane technology separation. The composite membrane comprises a cross-linked GO separation layer and a supporting layer, a m-xylylenediamine MXDA cross-linked GO layer is used as the separation layer, and a hydrolyzed polyacrylonitrile hPAN polymer membrane is used as the supporting layer; wherein the GO layer and the hPAN polymer film are covalently bonded through MXDA to form a cross-linked network. The preparation method comprises the following steps: firstly, respectively preparing graphene oxide GO; secondly, hydrolyzing a polyacrylonitrile (hPAN) matrix membrane; and finally, constructing a dual cross-linked network system through heat treatment, so that covalent cross-linked bonds are formed between GO nanosheet layers and between GO-hPAN base membranes, and the GO cross-linked membrane is prepared. The density of carboxylic acid groups on the surface of the hPAN membrane can be dynamically optimized by regulating and controlling the type of the basic catalyst, the concentration of the solution, the hydrolysis temperature and the hydrolysis time, a high-efficiency mass transfer channel is created for the composite membrane through a two-dimensional covalent cross-linked structure, and the composite membrane is endowed with excellent dye selective separation performance and anti-swelling stability.
Owner:DALIAN UNIV OF TECH
Preparation method of hydrophobic modified polyethersulfone porous membrane
The invention provides a preparation method of a hydrophobic modified polyethersulfone porous membrane, which comprises the following steps: firstly, preparing a hydrophobic modified solution, then carrying out crosslinking pretreatment to form a hydrophobic crosslinking coating on a polyethersulfone base membrane, then carrying out crosslinking under ultraviolet irradiation, and finally preparing the hydrophobic polyethersulfone porous membrane. The pre-crosslinked membrane formed by crosslinking pretreatment is formed by forming a hydrophobic crosslinked coating on a polyethersulfone base membrane, and a hydrophobic monomer is grafted on the hydrophobic crosslinked coating under the irradiation of ultraviolet light; the hydrophobic cross-linked coating not only coats the outer surface of the polyethersulfone base membrane, but also can be impregnated on a porous structure in the polyethersulfone membrane, and finally the hydrophobic modified polyethersulfone porous membrane is prepared. Wherein the cross-linking agent is a monomer containing a plurality of unsaturated bonds, an addition polymerization reaction can occur among the unsaturated bonds to form a spatial net-shaped structure, the hydrophobic cross-linking coating can be firmly covered on the porous structure of the polyether sulfone and cannot fall off, and the hydrophobic monomer is also provided with unsaturated bonds, so that the addition polymerization reaction occurs between the hydrophobic monomer and the cross-linking agent, and a certain number of hydrophobic groups are grafted.
Owner:FEATURE TEC (SHANGHAI) ADVANCED MATERIALS CO LTD
A low-agglomerated spherical aluminum nitride powder and a method for preparing the same
A kind of low agglomeration aluminum nitride powder preparation method, comprising the following steps: S1: 50-60 parts of aluminum nitrate nine water, 60-80 parts of film-forming solution and 20-30 parts of glucose monohydrate are mixed uniformly, after stirring 1-2h, it is poured into polytetrafluoroethylene dish at room temperature 25 ℃ and is stationary 4-6h, and crosslinked film is obtained;S2: the crosslinked film obtained in step S1 is burned at 300-400 ℃ for 30-40 min in argon environment, calcined at 800-900 ℃ for 1-2h in ammonia environment, then at 900-1000 ℃, heat preservation 1-2h, finally at 1200-1400 ℃, calcined 1-2h, and aluminum nitride powder is obtained.The low agglomeration spherical aluminum nitride powder machine preparation method of the application, the particle size of the prepared aluminum nitride powder is fine, the agglomeration rate is low, the conversion rate is high and the specific surface area is large.
Owner:FUJIAN HUAQING ELECTRONICS MATERIAL TECH
Needle valve and manufacturing method thereof
In order to provide a needle valve and a manufacturing method for suppressing the generation of particles, a needle valve (1) is provided with: a diaphragm (3) having a needle part (3a) and a deformable membrane part (3b) that extends outward of the needle part (3a); and a main body (5) in which a valve chamber (6) is formed and which has a cylindrical flow path section (5a) that opens into the valve chamber, the opening area of the flow path section being adjustable by the reciprocating movement of the needle section in the direction of the movement axis (C), each of the needle section and the flow path section being configured from crosslinked PFA from one end to the other end, and each of the needle section and the flow path section being configured from crosslinked PFA from the other end to the other end. The tertiary carbon concentration M1 (mol%) at one end and the tertiary carbon concentration M2 (mol%) at the other end in each axial direction satisfy M1 > = 0.01, M2 > = 0.01, and 0.8 < = M1 / M2 < = 1.2. The production method comprises: a step for obtaining a cut sheet of a crosslinked PFA film which is crosslinked so that the tertiary carbon concentration is 0.01 mol% or more; re-molding the cut sheet to obtain a re-molded object; and obtaining the needle part and the flow path part from the reformed object.
Owner:ASAHI YUKIZAI KOGYO CO LTD
Photovoltaic pre-crosslinked membrane, preparation method and application thereof, photovoltaic module and preparation method thereof
Owner:RISEN ENERGY CO LTD
PDMS-ROF cross-linked membrane based on beta-ketoenamine structure as well as preparation method and application of PDMS-ROF cross-linked membrane
PendingCN120420846ADistillationHydroxy compound separation/purificationPolymer scienceBackbone chain
The invention relates to a PDMS-ROF cross-linked membrane based on a beta-ketoenamine structure as well as a preparation method and application of the PDMS-ROF cross-linked membrane, and belongs to the field of high polymer material and membrane separation. The preparation method comprises the following steps: adding an aldehyde monomer solution into a PDMS solution of which a branched chain or a main chain is connected with amino groups to obtain a PDMS-ROF membrane casting solution with a beta-keto-enamine structure, blade-coating the PDMS-ROF membrane casting solution on a hydrophobic base membrane, and drying to obtain the PDMS-ROF membrane based on the beta-keto-enamine structure. The invention provides a PDMS-ROF membrane with high pervaporation performance based on a beta-ketoenamine structure and a preparation method of the PDMS-ROF membrane. According to the PDMS-ROF membrane disclosed by the invention, through Schiff base reaction between amino and aldehyde group and subsequent irreversible enol-ketone tautomerization synthesis, the preparation method simultaneously realizes rapid crosslinking and formation of a high-rigidity structure; the obtained PDMS-ROF membrane has an excellent separation factor and also has a considerable total flux.
Owner:HUAZHONG UNIV OF SCI & TECH
Thermally conductive composition
PCT designated stageWO2026022105A1Printed circuit detailsSemiconductor/solid-state device detailsPolymer scienceCross linker
A method of forming a crosslinked film comprising crosslinking a precursor film disposed on a surface wherein the precursor film comprises a precursor polymer and a crosslinking agent; and either: the precursor polymer is substituted with one or more carbonyl groups and the crosslinking agent comprises a plurality of amine groups, or the precursor polymer is substituted with one or more amine groups and the crosslinking agent comprises a plurality of carbonyl groups. The crosslinked film may be used as a high thermal conductivity underfill in a 3D-chip.
Owner:SUMITOMO CHEM CO LTD +1
Machine washable wool fabric and preparation method thereof
The invention relates to the technical field of fabrics, in particular to a machine-washable wool fabric and a preparation method thereof.The machine-washable wool fabric is prepared by blending modified wool and the balance flame-retardant terylene, the modified wool is prepared from original wool with the fiber diameter being 18-22 microns, the impurity content being smaller than or equal to 1.5% and the moisture regain being 12-18% through biological enzyme-physical synergistic modification treatment, and the felting shrinkage of the fabric is smaller than or equal to 3%; the flame-retardant polyester contains a phosphorus-nitrogen flame retardant with the mass fraction of 10 to 14 percent; according to the invention, biological enzyme treatment replaces traditional chemical etching, so that environmental pollution is reduced; the problem of felting is fundamentally solved on the premise that the main body structure of the wool fiber is not damaged by the formation of the functional cross-linked film; the synergistic effect of the flame-retardant polyester and the modified wool realizes the integration of multiple functions. According to the technical scheme, the wool fabric has machine washing adaptability, the flame-retardant safety and the mechanical durability are improved, and the application of the wool fabric in the field of high-end functional textiles is further widened.
Owner:BIEM L FDLKK GARMENT CO LTD
Multilayer monoaxially oriented crosslinked film and process
ActiveGB2612905BSynthetic resin layered productsDomestic containersPolymer scienceCross linked membrane
A monoaxially oriented, crosslinked multilayer film comprising an outer layer, a sealing layer and a core layr arranged there between. The core layer may comprise an oxygen barrier material, preferrab
Owner:FLEXOPACK SA
Catalyst-free crosslinking of propiolate functionalized molecules and polymers
PendingCN121969995AOrganic compound preparationCarboxylic acid esters preparationPolymer sciencePhosphonium
Disclosed is a novel method for preparing a crosslinked film without the use of a catalyst. The propiolic acid ester is obtained by grafting propiolic acid with glycidyl or epoxy under mild conditions by using a phosphonium catalyst. The propiolic acid ester can be thermally crosslinked at temperatures as low as 120 DEG C (such that the polymer film is insoluble), while some embodiments can be photoinduced crosslinked upon exposure to DUV light. The resulting cross-linked membrane is equivalent to or better than an acid-catalyzed epoxide cross-linked membrane in stability, and can be used in a variety of different applications.
Owner:BREWER SCIENCE INC
A high-performance, aging-resistant c-PIM / UiO crosslinked membrane, its preparation method and its application
This invention provides a high-performance, aging-resistant c-PIM / UiO crosslinked membrane, its preparation method, and its application, belonging to the field of gas separation membrane technology. The crosslinked membrane is a porous homogeneous membrane comprising a bromomethylated BM-PIM matrix and a porous MOF crosslinking agent, wherein the porous MOF crosslinking agent is embedded in the BM-PIM matrix. First, the bromomethylated polymer BM-PIM is prepared; second, amino-modified metal-organic framework materials (MOFs) are prepared; finally, the BM-PIM / MOF composite membrane is heat-treated using a temperature gradient method to construct multiple covalent crosslinked networks within the membrane, thus preparing the c-PIM / MOF crosslinked membrane. In the crosslinked membrane obtained by this invention, the regular channels within the porous MOF crosslinking agent and the micropores of the BM-PIM matrix serve as gas transport channels, and the two work synergistically to form a defect-free structure, resulting in a membrane with good long-term stability and high gas selectivity.
Owner:DALIAN UNIV OF TECH
A high-concentration carbon nanotube water-based epoxy composite coating with a hydrophobic shell layer constructed by tannic acid and a preparation method thereof
This invention belongs to the field of waterborne nanocomposite materials and anti-corrosion coatings. It relates to a high-concentration carbon nanotube waterborne epoxy composite coating and its preparation method, utilizing tannic acid to construct a hydrophobic shell, to solve problems such as porosity, whitening, and water absorption swelling caused by the application of traditional dispersants in waterborne carbon nanotube coatings. The method first uses polyvinylpyrrolidone (PVP) to ultrasonically disperse multi-walled carbon nanotubes (MWCNTs) in aqueous phase. Tannic acid is then introduced under alkaline conditions for in-situ complexation and self-assembly, constructing a hydrophobic cross-linked film at the PVP / MWCNTs interface to achieve hydrophobic modification, obtaining a stable, bubble-free, high-concentration carbon nanotube modified slurry. This slurry is then compounded with waterborne epoxy resin and various additives, and a curing agent is added to cure it into a film. This invention improves the dispersion stability of MWCNTs and its interfacial compatibility with epoxy groups by constructing a hydrophobic shell through in-situ self-assembly, shielding hydrophilic groups, enhancing the coating's impermeability and long-term anti-corrosion performance. The process is environmentally friendly and has excellent industrial application prospects.
Owner:NANJING SHENYE INTELLIGENT SYST ENG
Antifogging coatings and methods of use thereof
Disclosed is an anti-fog coating composition for forming a cross-linked film, the anti-fog coating composition comprising a prepolymer and at least one amine-containing cross-linking agent. The prepolymer comprises one or more charged monomer residues, one or more uncharged hydrophilic monomer residues, and one or more amine reactive monomer residues. The cross-linked film has a haze value change of less than 30% when exposed to a fogging condition for a period of more than 30 seconds. Also disclosed is a kit comprising a first compartment comprising the prepolymer and a second compartment comprising the amine-containing crosslinking agent. Also disclosed herein are anti-fog films and coated articles comprising anti-fog coatings. Also disclosed is a method of preparing an anti-fog coated substrate by applying the composition to the anti-fog coated substrate.
Owner:ACTNANO INC
Diaphragm valve and manufacturing method thereof
The purpose of the present invention is to provide a diaphragm valve and a manufacturing method for suppressing the generation of particles, the diaphragm valve (1A) comprising: a diaphragm (3) having a valve body part (3a) and a diaphragm part (3b) that extends outward from the valve body part and is deformable in the direction of a movement axis (C); and a main body (5) having a valve seat section (5a) in which the valve body section that reciprocates in the direction of the movement axis comes into contact with and separates from each other, one of the valve body section and the valve seat section being provided with a rib (31) that protrudes toward the other, the rib being configured from crosslinked PFA from the tip thereof to the root thereof, the tertiary carbon concentration M1 (mol%) at the tip and the tertiary carbon concentration M2 (mol%) at the root satisfy M1 > = 0.01, M2 > = 0.01, and 0.8 < = M1 / M2 < = 1.2. The present invention is provided with: a step for obtaining a cut sheet of a cross-linked PFA film which is cross-linked so that the tertiary carbon concentration is 0.01 mol% or more; re-molding the cut sheet to obtain a re-molded object; and obtaining a rib from the reformed object.
Owner:ASAHI YUKIZAI KOGYO CO LTD
Polypropylene-based cross-linked quaternary ammonium anion exchange membrane, its preparation method and application in hydrogen production by electrolysis of water
The application belongs to the technical field of anion exchange membranes for water electrolysis hydrogen production, and discloses a polypropylene-based cross-linked quaternary ammonium anion exchange membrane, a preparation method thereof and application thereof in water electrolysis hydrogen production. The polypropylene is used as a polymer main chain, a benzyl chloride active reaction site is given to an intermediate film through radiation grafting, and then precise cross-linking is realized between polymer segments through a Menshutkin reaction. Two different flexible cross-linking agents are selected to form different cross-linking networks, effectively solving the defects of weak mechanical properties and poor dimensional stability of uncross-linked membranes. Meanwhile, by precisely controlling the ratio of amination and cross-linking, the coupling optimization of the ion conductivity, mechanical properties and dimensional stability of the membrane material is realized. Due to the structural matching of the main chain and the side chain, the multiple gains of cross-linking and the synergistic balance of multiple properties, the anion exchange membrane material exhibits excellent comprehensive performance and good application potential in related electrochemical applications.
Owner:TIANJIN UNIV +1
Polyether-ether-ketone, cross-linked membrane as well as preparation method and application of cross-linked membrane
The invention discloses polyether-ether-ketone, a cross-linked membrane as well as a preparation method and application thereof, relates to the technical field of membrane materials, and solves the problems that phosphoric acid is easy to lose, the proton conductivity is low and the preparation process is complicated in the traditional proton exchange membrane under a high-temperature condition in the prior art. The preparation method comprises the following steps: copolymerizing a di-tert-amine substituted diphenyl ether diphenol monomer, tetramethyl biphenol and 4, 4 '-difluorobenzophenone to prepare polyether-ether-ketone, preparing the polyether-ether-ketone into a membrane casting solution, and carrying out film casting to obtain a homogeneous membrane; respectively irradiating the two sides of the homogeneous membrane by using an ultraviolet lamp, and then putting the homogeneous membrane into a phosphoric acid solution to obtain a UV-PA cross-linked membrane; or putting the homogeneous membrane into the phosphoric acid solution, and irradiating the two sides of the membrane by using the ultraviolet lamp to obtain the PA-UV cross-linked membrane. The binding capacity of the cross-linked membrane to phosphoric acid and excellent proton conductivity are effectively achieved, meanwhile, the operation stability of the cross-linked membrane in the high-temperature and low-humidity environment is remarkably improved, and the cross-linked membrane can be applied to the field of fuel cells.
Owner:CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY CHINESE ACADEMY OF SCIENCES
Transport property modulation via solvent specific behavior in crosslinked non-aqueous membranes
Nonaqueous redox flow batteries are one economically promising solution for meeting grid-scale energy storage needs at discharge durations of 10 h or more. However, membrane transport properties in nonaqueous systems are not as well understood as in water. Solvent-specific effects complicate efforts to understand transport in nonaqueous. In one aspect, the disclosure relates to blended cross-linked membranes compositions, methods of making same, and devices, products, and systems comprising same. In one aspect, the disclosed blended cross-linked membranes compositions comprise a cross-linked first polymer and a second polymer. The disclosed blends have desired permeabilities for selected cations and rejected undesired materials from the redox reaction mixture. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
Owner:UNIV OF VIRGINIA PATENT FOUND
Chitosan-based hemostatic composition and application thereof
InactiveCN120285271ASurgical adhesivesPharmaceutical delivery mechanismCalcium silicateDressing change
The invention discloses a chitosan-based hemostatic composition and application, and relates to the technical field of hemostatic compositions.The composition is prepared from, by mass, 5%-10% of chitosan, 3%-7% of polyvinylpyrrolidone, 1%-2% of calcium silicate, 1%-2% of montmorillonite, 0.1%-0.5% of triethanolamine, 2%-3% of polyethylene glycol and 70%-90% of water. Chitosan and PVP are dissolved under the condition that the pH is smaller than 6.5, then triethanolamine is added to adjust the pH to be about 7.8, and an ionic bond cross-linked membrane is formed under the participation of calcium silicate and montmorillonite; the hemostatic membrane disclosed by the invention can be quickly formed on a wound surface, realizes long-time hemostasis and physical isolation, and has the capability of re-forming the membrane; wound blockage and secondary injury caused by frequent replacement and application can be effectively reduced, the infection rate is greatly reduced, and the wound healing time is shortened; the hemostatic gel can be widely applied to nursing and hemostasis of superficial skin wounds after epidermis operation.
Owner:BEIJING UNIV OF CHEM TECH
Thermally conductive composition
A method of forming a crosslinked film comprising crosslinking a precursor film disposed on a surface wherein the precursor film comprises a precursor polymer and a crosslinking agent; and: the prec
Owner:SUMITOMO CHEM CO LTD
Anti-fog coating and method of using the coating
An anti-fog coating composition is disclosed that forms a crosslinked film comprising a prepolymer and at least one amine-containing crosslinking agent. The prepolymer comprises one or more charged monomer residues, one or more hydrophilic uncharged monomer residues, and one or more amine-reactive monomer residues. The crosslinked film exhibits a change in haze value of less than 30% when exposed to fogging conditions for a period longer than 30 seconds. A kit comprising a first compartment containing the prepolymer and a second compartment containing the amine-containing crosslinking agent is also disclosed. Coated articles comprising the anti-fog film and the anti-fog coating are also described herein. A method for producing a substrate by applying the composition to the anti-fog coated substrate is also disclosed.
Owner:ACTNANO INC
A process and method for preparing 3D nano-images and laser holographic images using cross-linked membranes
This invention relates to the field of laser holographic image manufacturing technology, and particularly to a process and method for preparing 3D nano-image laser holographic images using cross-linked films, comprising the following steps: unwinding; printing alignment marks; printing binder and overprinting alignment; printing a UV imaging layer and curing; and rewinding. This application achieves high-precision overprinting alignment on transparent films. By pre-printing colored alignment marks on the surface of the cross-linked film, the difficult-to-identify transparent film is transformed into an identifiable material with a clear visual reference. A method of real-time comparison between the mark signal and the printing plate phase signal is used to perform dynamic overprinting alignment while printing the binder. The printing plate speed is adjusted in real time according to the deviation, achieving parallel and coordinated control of binder printing and overprinting alignment. This ensures that the printing position of the binder layer always dynamically coincides with the mark reference, solving the problem of difficult signal acquisition on transparent films and improving overprinting accuracy.
Owner:HANGZHOU MICRO-NANO CLOUD MEMBRANE NEW MATERIALS CO LTD
Electrolyte with temperature response characteristic, preparation method thereof and battery
The invention belongs to the technical field of electrolyte preparation, and particularly relates to an electrolyte with a temperature response characteristic, a preparation method of the electrolyte and a battery. The electrolyte comprises a first component and a second component, the first component comprises a furan derivative; and the second component comprises a maleimide derivative. A first component containing a furan derivative and a second component containing a maleimide derivative are introduced into the electrolyte, the furan derivative and the maleimide derivative can be subjected to a Diels-Alder reaction to form a cross-linked membrane under the high-temperature condition of not lower than 60 DEG C, and a compact protective layer is generated on the surface of an electrode in situ.
Owner:STATE GRID HUNAN ELECTRIC COMPANY DISASTER PREVENTION & REDUCTION CENT +3
Manufacturing of polyethylene thin films for high-altitude balloons
Aspects of the disclosure relate to manufacturing a balloon envelope for use in a stratospheric balloon system. For instance, a stream of polyethylene mixture is extruded through an extruder in order to orient molecules of polymer chains of polyethylene and to provide an oriented film. The oriented film is passed through an electron beam and thereby crosslinking the polymer chains to provide a cross-linked film. The cross-linked film is heat sealed to form the balloon envelope.
Owner:AEROSTAR INT LLC
A film pasting agent, and a preparation method and application thereof
This invention relates to the field of medical devices, specifically to a patch application, its preparation method, and its application. The patch comprises an immediate-release layer, a cross-linking layer, and a sustained-release layer; the cross-linking layer is placed between the immediate-release and sustained-release layers, with the immediate-release layer in contact with the skin; the immediate-release layer comprises a first microsphere, which has a polyvinyl alcohol coating and an ibuprofen core; the cross-linking layer is a calcium ion cross-linked membrane obtained by cross-linking sodium alginate and calcium chloride; the sustained-release layer comprises a second microsphere, which has a polylactic acid-glycolic acid copolymer coating and a diclofenac sodium core. The patch application provided by this invention can rapidly reduce inflammation and pain through the anti-inflammatory and analgesic microspheres and maintain the surgical patch for a certain period of time, while also providing local physical cooling. Compared with traditional patches, it alleviates postoperative pain to a certain extent and accelerates wound healing.
Owner:THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIV (GUANGZHOU RESPIRATORY CENT) +1
A process for sealing a heat-generating tube and a composition of silicone oil for use in the process
PendingCN122160950AOhmic-resistance waterproof/air-tight sealsHeating element shapesPolymer scienceMeth-
The application relates to the technical field of material surface treatment, and discloses a heating tube sealing process and a silicone oil composition used in the process. The heating tube sealing process of the application is prepared by preparing a silicone oil composition and dropping the silicone oil composition on the end port of a heating tube in a residual heat state, spreading and infiltrating the silicone oil composition into a metal capillary structure by using residual heat, curing to form a silicon-oxygen crosslinked film layer through gradient heating, and completing sealing through post-heating treatment, so that the air tightness, waterproofness, air permeability and aging resistance of the heating tube are effectively improved, and the production efficiency is further improved. Meanwhile, the silicone composition of the heating tube sealing process of the application realizes the multiple functions of water sealing, air permeability and explosion prevention of the film layer through reasonable compounding of polymethylhydrogen siloxane, an additive, a crosslinking agent and a microstructure regulating agent.
Owner:ZHONGSHAN MINGJIANG HARDWARE & ELECTRICAL APPLIANCE CO LTD
Manufacturing of polyethylene thin films for high-altitude balloons
Aspects of the disclosure relate to manufacturing a balloon envelope for use in a stratospheric balloon system using an improved double-bubble blown-film extrusion process with water quenching and electron beam processing. A stream of polyethylene mixture is extruded through an extruder to orient molecules of polymer chains and provide an oriented film. The oriented film is passed through an electron beam, crosslinking the polymer chains to produce a cross-linked film with enhanced mechanical properties. The cross-linked film is heat sealed to form the balloon envelope comprising multiple gores. The resulting balloon envelope exhibits superior characteristics including crystallinity greater than 50%, strength to weight ratio greater than 1 MPa / (dtg / cm3), thickness less than 1.5 mil, thermal emissivity less than 0.03 at 193K, and optical clarity greater than 95%. The manufacturing process may include water quenching to enhance optical clarity and dual electron beam treatment for uniform crosslinking throughout the film thickness.
Owner:AEROSTAR INT LLC
Ion solvation membrane as well as preparation method and application thereof
The invention relates to the technical field of new energy materials and electrochemistry, in particular to an ion solvation membrane and a preparation method and application thereof. The preparation method of the ion solvation membrane comprises the following steps: carrying out chemical cross-linking reaction on a cross-linking agent and polyvinyl alcohol, and then carrying out deprotonation on a cross-linked membrane; wherein the cross-linking agent is a halogenated aromatic hydrocarbon and / or halogenated triazine compound; the molar weight of the cross-linking agent is 1%-10% on the basis of the molar weight of the polyvinyl alcohol. The invention provides an ion solvated membrane based on poly (bromomethyl) benzene crosslinked polyvinyl alcohol. The ion solvated membrane has the advantages of low swelling ratio, high KOH loading capacity, low area resistance and excellent air tightness. In alkaline water electrolysis, the membrane shows excellent electrolytic performance and stability.
Owner:TSINGHUA UNIVERSITY
A method for preparing an antioxidant-enhanced cross-linked polybenzimidazole electrolyte membrane material
A method for preparing an antioxidant-enhanced cross-linked polybenzimidazole electrolyte membrane material, specifically involving a method for preparing a cross-linked membrane. The method involves dissolving 3,3'-diaminobenzidine and 4,4'-diphenyl ether dicarboxylic acid in PPA to prepare OPBI; then adding different amounts of 4,4'-dichlorodiphenyl disulfide for cross-linking; the cross-linked membrane is then immersed in a PA solution to obtain the final product. The membrane prepared in this invention achieves proton transfer, thereby exhibiting excellent proton conductivity and improving membrane stability. The covalent bond interaction between 4,4'-dichlorodiphenyl disulfide and the OPBI framework increases the mechanical properties of the membrane. The cross-linked membrane of this invention exhibits high mechanical properties, thermal stability, proton conductivity, and antioxidant properties under high-temperature anhydrous conditions. This invention has applications in high-temperature fuel cells.
Owner:HEILONGJIANG UNIV
Light-operated dual switchable circular polarization luminescent material and preparation method and application thereof
The invention provides a light-operated dual switchable circularly polarized light emitting (CPL) material and a preparation method and application thereof. The preparation method of the material comprises synthesis of a monomer Az, synthesis of a monomer AzOH, synthesis of a polymer PAzo and preparation of a co-assembled film. According to the invention, the polymer PAzo and the fluorescent molecules are co-assembled, and meanwhile, limonene steam is utilized to induce the azobenzene polymer in a high-temperature environment; after a chiral source is removed, cross-linking can be carried out through an aldolization reaction of a hydroxyl site so as to realize chiral fixation; the light-operated dual switchable CPL material is prepared through cross-linked membrane light-induced isomerization treatment, and the light-operated dual switchable CPL material not only shows erasure and recovery of chiral information, but also shows reduction and recovery of luminous intensity.
Owner:ETERNAL ELECTRONIC (SUZHOU) CO LTD +1