Patents
Literature
58 results about "Cross linked membrane" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Crosslinked graphene-based membranes: fabrication methods, characteristics, and applications in separation processes
PCT designated stage expiredWO2025023890A1MembranesSemi-permeable membranesCarbideCross linked membrane
Disclosed is a method of fabricating a self-standing Graphene Oxide (GO) membrane comprising a plurality of layers of crosslinked GO sheets, the method comprising using a crosslinking agent to crosslink between oxygen-containing functional groups of neighbour GO sheets, wherein the crosslinking agent is a metallic oxide or a carbide.
Owner:NATIONAL UNIVERSITY OF SINGAPORE
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
Preparation method of MOFs (Metal-Organic Frameworks) enhanced bacterial cellulose membrane as well as product and application thereof
PendingCN119552406Alow water absorptionLow swelling rateFuel and primary cellsFuel and secondary cellsPoly(diallyldimethylammonium chloride)Carboxylic acid
The invention discloses a preparation method of an MOFs reinforced bacterial cellulose membrane as well as a product and application of the MOFs reinforced bacterial cellulose membrane, an in-situ growth method, a polymerization method and a chemical cross-linking method are combined, an MOFs material grows in the cellulose membrane, then modification is performed by using poly (diallyldimethylammonium chloride) with different concentrations and 1, 2, 3, 4-butanetetracarboxylic acid with different concentrations, and the MOFs reinforced bacterial cellulose membrane is obtained. A series of alkaline anion exchange membranes based on bacterial cellulose are synthesized. The prepared cross-linked membrane has good durability under various extreme conditions, relatively low swelling rate and water absorption rate, high conductivity and high mechanical strength, and when the prepared cross-linked membrane is assembled into a flexible zinc-air battery (F-ZAB), the excellent power density of 282.4 mWcm <-2 > can be obtained at room temperature.
Owner:YANCHENG INST OF TECH
Antibacterial skin-care cleansing lotion and preparation method thereof
The invention discloses an antibacterial skin-care cleansing lotion and a preparation method thereof, and belongs to the technical field of personal care products. The skin cleansing liquid comprises the following core components: a double-embedded tea tree oil microcapsule, wherein the inner layer of the double-embedded tea tree oil microcapsule comprises beta-cyclodextrin inclusion tea tree oil, the outer layer of the double-embedded tea tree oil microcapsule comprises a sodium alginate-chitosan ionic cross-linked membrane, natural antibacterial peptide PA-3, dipotassium glycyrrhizinate, sodium lauroyl sarcosinate, a hyaluronic acid cross-linked polymer and a pH buffer system. The preparation method comprises the following steps: constructing a dual-embedding microcapsule through spray drying-ionic crosslinking to realize slow release of the tea tree oil; the hyaluronic acid three-dimensional network is used for loading PA-3, and protease degradation is resisted; and uniform dispersion of the microcapsules is ensured by adopting biaxial shearing emulsification. The product has the advantages of efficient antibiosis, gradient controlled release, low irritation and thermal stability, and is suitable for daily skin care and cleaning and repairing of sensitive and damaged skin.
Owner:JIANGSU SHIGANJIA BIOTECHNOLOGY CO LTD
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
Preparation method and application of graphene oxide microcapsule carrying hydrophilic drug
PendingCN119679758AOrganic active ingredientsEnergy modified materialsPharmacy medicineUltrasonic radiation
The invention discloses a preparation method and application of a hydrophilic drug-loaded graphene oxide microcapsule, and the graphene oxide microcapsule is a microstructure material which takes a cross-linked membrane constructed by graphene oxide as a shell and takes an organic solvent loaded with a hydrophilic drug as a core. The preparation method comprises the following steps: carrying out high-intensity ultrasonic radiation on an organic solvent containing the hydrophilic drug and a water phase containing sulfhydrylated graphene oxide, so as to prepare the graphene oxide microcapsule loaded with the hydrophilic drug in one step. The method is rapid, simple, convenient, efficient, environmentally friendly, wide in raw material source and high in packaging capacity, and can be widely applied to loading of various hydrophilic drugs. Besides, based on some characteristics of the graphene oxide microcapsule, such as pH responsiveness, reduction responsiveness, photothermal effect and the like of graphene oxide, photothermal therapy can be carried out while controllable release of hydrophilic drugs is realized. Therefore, the method disclosed by the invention is of great significance for simply and efficiently preparing the micro-structure carrier and synchronously realizing safe packaging of the hydrophilic medicine.
Owner:NORTHEASTERN UNIV CHINA
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
Diaphragm valve and manufacturing method therefor
To provide a diaphragm valve that inhibits generation of particles, and a manufacturing method.SOLUTION: A diaphragm valve 1A includes: a diaphragm 3 including a valve body part 3a and a membrane part 3b that extends outward from the valve body part and can deform in a movement axis C direction; and a body 5 including a valve seat part 5a which the valve body part, moving reciprocally in the movement axis direction, comes into contact with and separates from, where one of the valve body part and the valve seat part is provided with a rib 31 protruding toward the other, the rib including a cross-linked PFA from a tip to a base thereof, and a tertiary carbon concentration M1 (mol%) in the tip and a tertiary carbon concentration M2 (mol%) in the base satisfy M1≥0.01, M2≥0.01, and 0.8≤M1 / M2≤1.2. A manufacturing method includes: a step of obtaining a cut piece of a crosslinked PFA film crosslinked such that the tertiary carbon concentration is 0.01 mol% or more; a step of reshaping the cut piece to obtain a reshaped product; and a step of obtaining a rib from the reshaped product.SELECTED DRAWING: Figure 1
Owner:ASAHI YUKIZAI KOGYO CO LTD
Integrated adhesive film
The utility model relates to an integrated adhesive film, and relates to the technical field of photovoltaic cells. The integrated adhesive film comprises a substrate film layer, a first adhesive layer and a second adhesive layer, wherein the substrate film layer is an adhesive film; the integrated adhesive film comprises a substrate film layer and a bearing film layer, the bearing film layer is a pre-crosslinking film, and the substrate film layer and the bearing film layer are compounded into the integrated adhesive film. The bearing film layer and the substrate film layer are compounded into a whole, so that the flowing speed of the integrated adhesive film is delayed, and the integrated adhesive film is prevented from flowing into a gap between the welding strip and a battery piece when the welding strip is pressed.
Owner:SUZHOU AIKANG PHOTOELECTRIC TECH CO LTD
Green construction of attapulgite / sodium alginate porous cross-linked membrane and uranium separation / enrichment method of attapulgite / sodium alginate porous cross-linked membrane
PendingCN119236908ALarge specific surface areaGood acid and alkali resistanceOther chemical processesRadioactive contaminantsClay mineralsGlycerol
The invention discloses a green construction method of an attapulgite / sodium alginate porous cross-linked membrane and a uranium separation / enrichment method of the attapulgite / sodium alginate porous cross-linked membrane. The method comprises the following steps: firstly, adding attapulgite modified by active substances in saponin-rich plants into a sodium alginate / glycerol mixed solution to prepare a membrane forming solution containing Pickering foam; and carrying out film casting and calcium ion crosslinking to obtain the attapulgite / sodium alginate porous cross-linked membrane, and applying the attapulgite / sodium alginate porous cross-linked membrane to efficient separation / enrichment of uranium in a water body. According to the preparation method disclosed by the invention, natural nanostructure clay minerals and plant active components are utilized to synergistically stabilize water-based foam, and further through green processes such as film casting, ionic crosslinking and the like and condition optimization, a thin film material with a porous crosslinking structure, acid and alkali resistance, excellent stability and adsorption performance is constructed; the uranium in the water body can be separated and enriched at low cost and high efficiency.
Owner:LANZHOU INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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
Catalyst-free crosslinking of propiolate-ester-functionalized molecules and polymers
PCT designated stage expiredWO2025043149A1Organic compound preparationCarboxylic acid esters preparationPolymer sciencePhosphonium
A novel method to prepare crosslinked thin films without the use of catalysts is disclosed. Propiolic acid is grafted to a glycidyl or epoxy group using a phosphonium catalyst under mild conditions to yield a propiolate ester. The propiolate ester is thermally crosslinkable (and the polymer film rendered insoluble) at temperatures as low as 120°C, and some embodiments may undergo photo¬ induced crosslinking upon exposure to DUV light. The resulting crosslinked films are equivalent or better in stability to acid-catalyzed epoxide crosslinked films and can be used for a multitude of different applications.
Owner:BREWER SCIENCE INC
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
Crosslinkable nonlinear-optical chromophore system
Owner:UNIV OF WASHINGTON
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
Photovoltaic module and production method thereof
The invention discloses a photovoltaic module and a production method of the photovoltaic module, and the photovoltaic module comprises a battery piece, a first pre-crosslinking film, a second pre-crosslinking film, front glass, a back pre-crosslinking film, a back adhesive film and a back plate or back glass, the first pre-crosslinking film is pasted on the front surface of the battery piece, and the second pre-crosslinking film is pasted on the back surface of the battery piece; the second pre-crosslinking film is attached to the side, back to the battery piece, of the first pre-crosslinking film, the front glass is attached to the side, back to the first pre-crosslinking film, of the second pre-crosslinking film, the back pre-crosslinking film is attached to the back face of the battery piece, and the back adhesive film is attached to the side, back to the battery piece, of the back pre-crosslinking film. And the back plate or the back glass is attached to one side, back to the back pre-crosslinking film, of the back adhesive film. According to the application, the first pre-crosslinking film is attached to the front surface of the battery piece, and then the second pre-crosslinking film is attached to one side, back to the battery piece, of the first pre-crosslinking film, so that the first pre-crosslinking film and the second pre-crosslinking film form a pre-crosslinking gradient, and the reliability of the photovoltaic module can be effectively improved.
Owner:JINKO SOLAR CO LTD +1
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
Crosslinkable nonlinear-optical chromophore system
Owner:UNIV OF WASHINGTON
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
Needle valve and method for manufacturing same
PCT designated stage expiredWO2025023176A1Diaphragm valvesEngine diaphragmsMedicineCross linked membrane
The purpose of the present invention is to provide a needle valve that reduces the generation of particles, and a manufacturing method of the needle valve. A needle valve 1 comprises: a diaphragm 3 having a needle part 3a and a deformable membrane part 3b extending outwards from the needle part 3a; and a body 5 in which a valve chamber 6 is formed and which has a cylindrical flow path part 5a that opens to the valve chamber. The opening area of the flow path part can be adjusted by a reciprocating movement of the needle part in the direction of a movement axis C. Each of the needle part and the flow path part is made of cross-linked PFA from one end to another end, and a tertiary carbon concentration M1 (mol%) at the one end in each axial direction and a tertiary carbon concentration M2 (mol%) at the other end satisfy M1 ≥ 0.01, M2 ≥ 0.01, and 0.8 ≤ M1 / M2 ≤ 1.2. A manufacturing method comprises: a step for obtaining a cut piece of a cross-linked PFA film cross-linked such that a tertiary carbon concentration is greater than or equal to 0.01 mol%; a step for obtaining a re-molded object by re-molding the cut piece; and a step for obtaining a needle part and a flow path part from the re-molded object.
Owner:ASAHI YUKIZAI KOGYO CO LTD
Method for grading, classifying, recycling and resource recycling of PCB photosensitive dry film residues
PendingCN120133295ASolid waste disposalTransportation and packagingChemical treatmentActivated carbon
The invention provides a method for graded and classified recycling and resource recycling of PCB photosensitive dry film residues, and belongs to the technical field of chemical treatment and classified recycling of solid hazardous waste. The method comprises the following steps: S1, uniformly mixing PCB photosensitive dry film residues with a water-soluble organic solvent, and then filtering to obtain super-crosslinked film residue powder and a first extracting solution; s2, uniformly mixing the first extracting solution with a strong alkaline solution, and extracting to obtain an organic phase containing an initiator system and an alkaline water phase; s3, standing and separating the alkaline water phase to obtain an adhesive and a second extracting solution; s4, adjusting the pH value of the second extracting solution to be acidic, and then filtering to obtain flocculent solid and a clarified water phase; and S5, carrying out recycling and resource utilization on the corresponding separated substances. According to the method, the initiator system, polymethyl methacrylate and the copolymer adhesive in the original dry film waste residues are separated out, the high-quality activated carbon is prepared, the production process is simple, the solvent can be recycled, the cost is low, and secondary pollution is avoided.
Owner:SOUTHWEAT UNIV OF SCI & TECH
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