1065 results about "Crosslinked polymers" patented technology

The invention provides a high-temperature-resistant magnesia-carbon composite refractory brick and a preparation method thereof, and belongs to the technical field of magnesium oxide refractory wall bricks, the refractory brick comprises the following raw materials: double-layer modified magnesium oxide, modified crystalline flake graphite, zircon powder, modified liquid phenolic resin and a benzoxazine cross-linking agent; the double-layer modified magnesium oxide is obtained by firstly coating magnesium oxide with powder phenolic resin, aluminum oxide and zirconium oxide and then coating magnesium oxide with asphalt, micron magnesium oxide, zirconium oxide and calcium oxide; the modified crystalline flake graphite is obtained by coating crystalline flake graphite with strontium hydroxide, asphalt and boron carbide; the modified liquid phenolic resin is formed by mixing liquid phenolic resin with a silane coupling agent and a polyacrylate cross-linked polymer. Double-layer modified magnesium oxide, modified crystalline flake graphite and modified liquid phenolic resin are prepared by adopting special components and a method and are matched with zircon powder and a benzoxazine cross-linking agent for use, and a reasonable forming and sintering process is designed, so that the refractory brick has good high-temperature stability, oxidation resistance, thermal shock resistance and the like.

The invention discloses an anti-scale cross-linked polymer fracturing fluid and a preparation method thereof, and relates to the technical field of petroleum fracturing fluids. When the anti-scale cross-linked polymer fracturing fluid is prepared, allylamine hydrochloride and epoxy chloropropane react to prepare a double-bond chlorinated intermediate; reacting the double-bond chlorinated intermediate with lauramidopropyl dimethylamine to prepare a cationic monomer; copolymerizing a cationic monomer and acrylamide to prepare a cationic polymer; the preparation method comprises the following steps: reacting L-lysine with formaldehyde and phosphorous acid to prepare phosphoric acid modified lysine; reacting the phosphoric acid modified lysine with allyl glycidyl ether to prepare a phosphoric acid modified monomer; acrylamide and an anionic monomer are copolymerized to prepare an anionic polymer; the anionic polymer and the cationic polymer are dissolved in water to prepare the anti-scale cross-linked polymer fracturing fluid. The anti-scale cross-linked polymer fracturing fluid prepared by the invention has the advantages of scale prevention, good temperature resistance, good shear resistance and self-crosslinking.

The present disclosure provides a crushed stone extraction system, comprising a delivery apparatus and a hydrogel. The hydrogel comprises a first composition and a second composition. The first composition comprises at least one crosslinkable polymer. The second composition comprises at least one crosslinking agent. The crosslinkable polymer is configured to be delivered to a lithotripsy position by the delivery apparatus and then encapsulate the crushed stones. The crosslinking agent is configured to be delivered to the lithotripsy position by the delivery apparatus and then react with the crosslinkable polymer to form an elastic hydrogel body encapsulating the crushed stones. The delivery apparatus is configured to adsorb the elastic hydrogel body and then remove the crushed stones. The present disclosure can remove multiple or even all of the fine crushed stones that cannot be taken out by conventional means at a time, thereby reducing the pain of patients.

The invention belongs to the technical field of capacitor carbon preparation, and particularly relates to coal tar-based capacitor carbon and a preparation method and application thereof. Comprising the following steps: by taking coal tar as a carbon source, carrying out Friedel-Crafts reaction under the action of a cross-linking agent and a catalyst to obtain a tar-based cross-linked polymer; and carbonizing the tar-based cross-linked polymer at 600-900 DEG C in a protective gas atmosphere to obtain the coal tar-based capacitor carbon. The coal tar is used as a carbon source, the coal tar is subjected to Friedel-Crafts reaction to obtain the coal tar-based hypercrosslinked polymer, the hypercrosslinked polymer can be directly subjected to one-step high-temperature carbonization without any activating agent to obtain the high-performance coal tar-based capacitor carbon, the method is simple, the cost is low, the carbon yield is high, and the method is suitable for industrial production. The prepared capacitor carbon has a high specific surface area, abundant micropores and a disordered structure, is applied to a supercapacitor as an electrode material, and shows excellent electrochemical performance and stability.

The invention relates to a composite solid electrolyte and a preparation method and application thereof. The preparation method of the composite solid electrolyte comprises the following steps: S1, mixing an inorganic filler and a fluorine-containing compound, and reacting at 70-90 DEG C under an acidic condition to obtain an inorganic filler wrapped by a fluorinated layer; then adding a fluorine ion complexing agent and a silane coupling agent for reaction to obtain a modified filler; adding a thermal decomposition type cross-linking agent into the polymer, and carrying out melt blending to obtain a cross-linked polymer; s2, uniformly mixing the modified filler, a cross-linked polymer, a lithium salt and a solvent to obtain a plurality of slurries containing the modified filler with different volume concentrations; and molding the slurry to prepare the composite solid electrolyte. According to the method, the fluorinated layer and the siloxane network are constructed step by step, so that the interface impedance is reduced, and efficient dissociation of the lithium salt is promoted; a three-dimensional network structure is combined, so that the tensile strength is improved; the modified filler is further designed in a gradient manner to improve the lithium ion transference number.

The present invention relates to a composite sulfide electrolyte, and a preparation method therefor and a use thereof. The composite sulfide electrolyte has a three-dimensional crosslinked structure formed by connecting a sulfide electrolyte and a dynamic bond-containing crosslinked polymer by means of chemical bonds. The polymer contains a sulfur element and exhibits relatively higher stability when interacting with the sulfide electrolyte, the chemical crosslinking between the sulfide electrolyte and the dynamic bond-containing crosslinked polymer is formed by means of multiple chemical bonds, such as a disulfide bond and an amido bond, and a strong binding force and self-healing function are provided, in order to simultaneously solve the problems of interfacial delamination and cracking caused by mechanical stress inside the sulfide electrolyte. When applied in an all-solid-state battery, the composite sulfide electrolyte can improve the limiting current density and cycle stability of the all-solid-state battery.

The invention discloses a method for efficiently preparing an ionic super-crosslinked polymer by a mechanochemical method as well as a product and application of the ionic super-crosslinked polymer, and belongs to the technical field of polymer material preparation. The preparation method comprises the following steps: adding a nitrogen-containing monomer, a cross-linking agent and a catalyst into a good solvent to obtain a reaction solution; carrying out planetary ball milling treatment on the reaction liquid, and carrying out a Friedel-Crafts alkylation reaction; and after the reaction is completed, recovering and purifying the product to obtain the ionic super-crosslinked polymer. The ionic super-crosslinked polymer prepared by the preparation method disclosed by the invention has a highly crosslinked and abundant pore structure, and meanwhile, the ionic super-crosslinked polymer has the performance advantages of good adsorption performance, excellent chemical stability and high thermal stability. The synthetic method of the ionic super-crosslinked polymer provided by the invention is efficient, energy-saving and environment-friendly, the product quality is high, and the method has wide popularization and application prospects.

The invention relates to the field of fire resistance, in particular to a composite fiber reinforced refractory brick and a preparation method thereof.The composite fiber reinforced refractory brick is prepared from, by weight, 70-80 parts of mullite, 40-50 parts of quartz, 20-30 parts of alumina, 40-60 parts of magnesium aluminate spinel fine powder, 5-10 parts of silicon carbide powder, 1-5 parts of composite fibers and 0.5-1 part of sodium tetrapolyphosphate; wherein the composite fiber is composed of modified zirconium oxide fiber and magnesium metal fiber. According to the preparation method, zirconium oxide fiber dispersion liquid, hydroxyethyl methylacrylate and N, N-methylene acrylamide are subjected to cross-linking polymerization under the action of a silane coupling agent, an initiator and an emulsifier, macromolecular chains are loaded on the surfaces of zirconium oxide fibers, the macromolecular chains are taken as cross-linking points, the zirconium oxide fibers are mutually linked to form a cross-linked polymer, and the zirconium oxide fibers are uniformly dispersed in the cross-linked polymer. The two-dimensional zirconium oxide fibers are constructed into a three-dimensional network structure, and the modified zirconium oxide fibers are prepared. The composite fiber can significantly enhance the strength and mechanical toughness of the refractory brick.

The invention relates to a modeling method in the field of molecular dynamics, in particular to an automatic polymer full-atom molecular dynamics modeling method, and the polymer modeling process is divided into three core steps: firstly, converting SMILES of a repetitive unit into SMILES of a polymer; secondly, constructing a single-chain structure; and finally, constructing a multi-chain amorphous system. The link of cross-linking reaction needs to be additionally added to the cross-linked polymer. According to the invention, through the built-in DREIDING force field parameters, an input file required by the Lammps molecular dynamics can be directly operated and generated.

The invention provides a delamination-resistant embedded silicone hydrogel contact lens having an insert that is embedded in a silicone hydrogel bulk material. The insert is made of a crosslinked polymeric material having a refractive index higher than that of the silicone hydrogel bulk material by at least 0.07 and comprises a diffractive structure disposed on one of the front and back curve surfaces of the insert for providing a diffractive power that contributes to the overall optical power of the contact lens.

A separation membrane, a preparation method therefor and a use thereof in magnesium and lithium separation are provided. The separation membrane includes, in sequence, a base material layer, a porous support layer, a polyamide layer and a modification layer. Cross-linked polymers forming the modification layer has structural units provided by polyphenols and polyamines, at least some of the structural units provided by the polyphenols are connected to the polyamide layer via ortho positions of phenolic hydroxyl groups. The preparation method includes sequentially preparing the porous support layer, the polyamide layer and the modification layer on the base material layer. The method of preparing the modification layer includes under a first pressure, bringing one side of the polyamide layer into first contact with the polyphenol solution; then under a second pressure, bringing one side of the polyamide layer into second contact with the polyamine solution, to complete a self-assembly reaction.

The invention provides a lithium ion battery binder for inhibiting silicon expansion, a negative pole piece, a lithium ion battery and an electric device, and relates to the technical field of lithium ion batteries. The lithium ion battery binder capable of inhibiting silicon expansion comprises a first polymer and a second polymer, wherein the first polymer is a cross-linked polymer with dynamic reversible covalent bonds; wherein the dynamic reversible covalent bond comprises a disulfide bond or a borate bond; the binder network provided by the invention not only can effectively limit the excessive slippage of a polymer and provide higher mechanical strength, but also can generate reversible fracture and recombination at a stress concentration point in the charging and discharging process due to the dynamic reversibility of a disulfide bond or a borate bond, converts concentrated stress into fracture energy of a chemical bond and dissipates the fracture energy, so that the mechanical strength of the polymer is improved, and the service life of the polymer is prolonged. Therefore, permanent damage of the network is avoided, the pole piece structure is kept complete in long-term circulation, and stable electrochemical performance is achieved.

The invention discloses a DA bond polymer with antibacterial and self-repairing functions for a wood surface as well as a preparation method and a use method of the DA bond polymer. Chitosan serves as a wall material, cinnamon essential oil serves as a core material, the cinnamon essential oil and chitosan antibacterial microcapsules are prepared through emulsification, crosslinking and spray drying, and essential oil controlled release is achieved. Then bisphenol A diglycidyl ether DGEBA and furfuryl alcohol FA are used as raw materials, furyl functional epoxy resin FER is prepared under the catalysis of triethylamine TEA, bismaleimide BMI is added, and a DA bond self-repairing polymer is prepared through a DA reaction; and adding 4, 4-diaminodiphenylmethane DDM into the system, reacting with redundant DGEBA to generate a cross-linked polymer network, and adding the microcapsules into a DA bond semi-interpenetrating self-repairing network solution to obtain the DA bond polymer. A thin film formed by brushing and curing wood has antibacterial and self-repairing functions, scratches and microcracks on the surface of the wood can be repaired, and microbial erosion is inhibited.

The invention relates to a secondary battery, a gel electrolyte precursor solution, a preparation method and an electric device. The secondary battery comprises an electrode plate; any electrode plate independently comprises an electrode active material layer; the secondary battery comprises a gel electrolyte, the gel electrolyte comprises a first gel electrolyte and a second gel electrolyte, the first gel electrolyte is located inside the electrode active material layer, and the second gel electrolyte is located outside the electrode pole piece; each of the first gel electrolyte and the second gel electrolyte independently comprises a cross-linked polymer, a gelation solvent and an electrolyte salt; the cross-linked polymer comprises a carbon-based chain segment; the gel electrolyte includes a polymerization inhibition residue. Wherein the gel electrolyte can be formed by soaking an electrode plate in a gel electrolyte precursor solution containing a polymerization inhibitor, forming and curing, so that polymerization inhibition residues can be formed in the secondary battery. The secondary battery has excellent capacity exertion and cycle performance.

The invention provides a solid-state electrolyte membrane based on a bicontinuous lithium-conducting network and a preparation method and application of the solid-state electrolyte membrane. The solid electrolyte membrane comprises a three-dimensional ceramic lithium-conducting network, and the three-dimensional ceramic lithium-conducting network is a three-dimensional continuous porous ceramic skeleton; pores of the three-dimensional ceramic lithium-conducting network are filled with the cross-linked polymer lithium-conducting network; the cross-linked polymer lithium-conducting network contains lithium salt and a plasticizer; wherein the three-dimensional ceramic lithium-conducting network and the cross-linked polymer lithium-conducting network form a space interpenetrating structure through physical interlocking and / or chemical bonding, and Li < + > migration paths of the three-dimensional ceramic lithium-conducting network and the cross-linked polymer lithium-conducting network are continuously communicated at least in the thickness direction. According to the high-strength solid-state electrolyte membrane based on the bicontinuous lithium conduction network, through the synergistic effect of the ceramic network and the polymer network, the cycle performance of a lithium battery is improved while the mechanical and electrochemical aspects are remarkably improved, and the high-strength solid-state electrolyte membrane is suitable for large-scale application of a high-energy-density solid-state battery.

An article comprising a composite body, wherein the composite body can comprise ceramic particles distributed within a binder. The binder can include a cross-linked polymer of a first polymer and a second polymer wherein the first polymer is a water-soluble polymer, and the second polymer is a water-insoluble polymer. The composite body can have a water stability factor (WS) of at least 70%, and may be adapted for adsorbing and desorbing lithium ions. The composite body can further have a high bulk compression strength of at least 70 N.

The invention provides a perovskite thin film preparation method, a perovskite thin film and a perovskite solar cell. The method comprises the steps of obtaining a substrate for preparing the perovskite thin film; obtaining a perovskite precursor solution, wherein the perovskite precursor solution comprises a first monomer molecule containing sulfydryl and a second monomer molecule containing a carbon-carbon double bond; coating the perovskite precursor solution on the substrate and carrying out annealing treatment to form a perovskite thin film; and photo-initiating a click reaction between sulfydryl in the first monomer molecule and a carbon-carbon double bond in the second monomer molecule to construct a cross-linked polymer network in situ in the perovskite thin film. A first monomer molecule containing sulfydryl and a second monomer molecule containing a carbon-carbon double bond are introduced into a perovskite precursor solution, so that the problem that the doping amount is limited due to poor solubility of a polymer when the polymer is directly added is avoided.

The invention provides a high-thermal-conductivity and high-adhesion thermal interface material and a preparation method thereof, and belongs to the technical field of thermal interface materials. The thermal interface material is prepared by in-situ cross-linking reaction of the following components: a polymer matrix comprising a polymer containing active functional groups and a cross-linking agent; the heat-conducting filler accounts for more than 90wt% of the total weight of the thermal interface material; the low-melting-point organic medium accounts for 0.1-5wt.% of the total weight of the thermal interface material, and the melting point of the low-melting-point organic medium is lower than the crosslinking curing temperature of the polymer matrix; wherein the heat-conducting filler forms a continuous three-dimensional heat-conducting path in a cross-linked polymer network, and the low-melting-point organic medium is uniformly dispersed in the network. Under the ultrahigh filler content, high bulk phase thermal conductivity and high initial viscosity are realized at the same time, and the contradiction between high thermal conductivity and high interface contact resistance is solved. The high viscosity at room temperature is beneficial to operation and storage, and is softened due to melting of an organic medium at the working temperature of a device, so that the interface wettability is dynamically enhanced, and the contact thermal resistance is minimized.

In a first aspect, a coating solution includes a soluble polymer and a crosslinking precursor. The soluble polymer includes an imide group. The crosslinking precursor includes a first amine group that is either reactive or passivated towards crosslinking and one or more additional amine groups, wherein the one or more additional amine groups has been passivated towards crosslinking such that the crosslinking precursor can be chemically converted, thermally converted, photo-converted or dissociated to form at least two reactive amines. In a second aspect, a process for forming a polymer film includes: (a) casting a coating solution, (b) activating the crosslinking precursor using an external stimulus to form at least two reactive amines and crosslink the polymer, and (c) drying the polymer film. The coating solution includes a soluble polymer, including an imide group, and a crosslinking precursor.

The invention discloses a composite sulfide electrolyte as well as a preparation method and application thereof. The composite sulfide electrolyte contains a three-dimensional cross-linked structure formed by connecting a sulfide electrolyte and a cross-linked polymer containing dynamic bonds through chemical bonds. The composite sulfide electrolyte provided by the invention contains a three-dimensional cross-linked structure formed by the sulfide electrolyte and the cross-linked polymer containing dynamic bonds through chemical bonds, and the polymer contains sulfur element, so that the polymer and the sulfide electrolyte are relatively stable; various chemical bonds form chemical cross-linking between the sulfide electrolyte and the cross-linked polymer containing the dynamic bonds, for example, disulfide bonds, amido bonds and the like are contained at the same time, strong binding force and a self-repairing function are achieved, and the problems of interface layering and cracking caused by internal mechanical stress of the sulfide electrolyte are expected to be solved at the same time. When the composite sulfide electrolyte is applied to the all-solid-state battery, the limiting current density and the cycling stability of the all-solid-state battery can be improved.

The invention belongs to the technical field of asphalt preparation, and provides a high-modulus composite modified asphalt material based on natural asphalt and a preparation method thereof. The method comprises the following steps: separating natural asphalt into a high-molecular asphaltene section and a medium-low-molecular colloid section, and preparing activated asphaltene and colloid sections through alkali treatment and spray drying; a styrene-butadiene-styrene block copolymer and a polyurethane prepolymer are taken as the basis, and a dynamic cross-linked polymer is synthesized through the steps of hydrazide treatment, boric acid group introduction, glutaraldehyde cross-linking and the like; organic modified clay and phenylated chitosan are prepared, a polyaniline composite material is prepared through in-situ polymerization of aniline, a PANI-clay-biomass compound is obtained, the ultraviolet absorption characteristic of polyaniline and the shielding effect of montmorillonite cooperate, the ultraviolet aging resistance of the material is improved, through multi-stage temperature control dispersion, the anti-aging performance of the material is improved, and the anti-aging performance of the material is improved. The various modified materials are compounded with a natural asphalt substrate to obtain the high-modulus composite modified asphalt material based on the natural asphalt.

A thermally curable modified polymer having high frequency and low dielectric constant, a synthesis method therefor and a use thereof. The thermally curable modified polymer has a monomer structure as shown in the following formula I. The thermally curable modified polymer can be widely applied to the fields of high-frequency communications, microelectronics industry, aerospace and the like as a low-dielectric-constant matrix resin or packaging material.

Disclosed are a lithium metal battery and a method of manufacturing the same, the lithium metal battery comprising a positive electrode, a negative electrode current collector, and a gel-type polymer electrolyte disposed between the positive electrode and the negative electrode current collector wherein the gel-type polymer electrolyte comprises a cross-linked polymer and a liquid electrolyte comprising an organic solvent and a lithium salt, and the cross-linked polymer is a product of a reaction between a multifunctional cross-linking agent having three or more functional groups and a (meth) acrylate-based compound having a polyethylene glycol moiety.

Polyhydric polymers may be converted to derivatives thereof by reaction with divinyl sulfone to provide vinyl sulfone substituted polymers, where the polymers may additionally be further derivatized, including crosslinked, and the crosslinked and non-crosslinked derivatives may be used in biomedical and other applications.

An anode and a lithium secondary battery comprising same are presented, the anode comprising: an anode current collector; and a protective layer disposed on the anode current collector and including a cross-linked polymer including a repeating unit derived from two or more types of multi-functional cross-linking agents, wherein the cross-linked polymer has a cross-linking density (g / n) of 300 or less.

The present invention provides an electronic or electrical device or component thereof comprising a cross-linked polymeric coating on a surface of the electronic or electrical device or component thereof; wherein the cross-linked polymeric coating is obtainable by exposing the electronic or electrical device or component thereof to a plasma comprising a monomer compound and a crosslinking reagent for a period of time sufficient to allow formation of the cross-linked polymeric coating on a surface thereof,wherein the monomer compound has the following formula:where R1, R2 and R4 are each independently selected from hydrogen, optionally substituted branched or straight chain C1-C6 alkyl or halo alkyl or aryl optionally substituted by halo, and R3 is selected from:where each X is independently selected from hydrogen, a halogen, optionally substituted branched or straight chain C1-C6 alkyl, halo alkyl or aryl optionally substituted by halo; and n1 is an integer from 1 to 27; and wherein the crosslinking reagent comprises two or more unsaturated bonds attached by means of one or more linker moieties and has a boiling point at standard pressure of less than 500° C.

The present application relates to a secondary battery, a gel electrolyte precursor solution, a preparation method, and an electric device. The secondary battery comprises a gel electrolyte, wherein the gel electrolyte comprises a first gel electrolyte inside an electrode active material layer and a second gel electrolyte outside an electrode sheet; the first gel electrolyte and the second gel electrolyte each independently comprise a cross-linked polymer, a gelling solvent and an electrolyte salt; the cross-linked polymer comprises a carbon-based chain segment; and the gel electrolyte comprises a polymerization inhibition residue.

The invention relates to the field of sealing materials, in particular to a heat-resistant and oil-resistant sealing gasket for an engine and a preparation method of the heat-resistant and oil-resistant sealing gasket. The liquid silicone rubber is prepared from the following raw materials in percentage by weight: 60-80% of a liquid silicone rubber base material, 15-28% of an oil-resistant heat-resistant base material, 0.1-3% of a cross-linking agent, 0.1-0.6% of a catalyst and the balance of a processing aid, the oil-resistant and heat-resistant base material is prepared from an inorganic filler, aramid pulp, polyhedral oligomeric silsesquioxane-alcoholic hydroxyl group, an activation dispersant and a double-active-group-epoxy silane coupling agent; the activation dispersant is a trihydroxymethyl caprolactone cross-linked polymer and / or bis (pinacol) borate; and the inorganic filler is composed of a plurality of components selected from fumed silica powder, nano-scale ceramic powder and zinc borate nano-powder. The oil-resistant and heat-resistant base material obtained by the scheme interacts with the silicone rubber base material, so that the prepared heat-resistant and oil-resistant sealing gasket for the engine has better comprehensive performance.

To provide a novel polymer suitable for use in a separation functional layer.SOLUTION: In a crosslinked polymer of the present invention, a polymer containing carbon atoms is crosslinked via a hydrocarbon group, and the hydrocarbon group is bonded to the carbon atoms. A separation functional layer 1 of the present invention contains the crosslinked polymer. The separation membrane 10 of the present invention comprises the separation functional layer 1, and a porous support 3 that supports the separation functional layer 1.SELECTED DRAWING: Figure 1

The invention discloses a reversible cross-linked polymer, a preparation method thereof and an application of the reversible cross-linked polymer in a battery. The reversible cross-linked polymer contains a silane coupling group containing an imino group. The reversible cross-linked polymer provided by the invention has a self-healing capability, can reform a dynamic reversible bond at a crack interface when being damaged by external force, promotes the repair of the structural crack of the material, can repair the crack caused by expansion and shrinkage of a high-volume change negative electrode in the charging and discharging process, reduces the side reaction of the interface, and improves the performance of the battery. The stability of the high-energy-density lithium battery can be improved, the service life of the battery is prolonged, and the safety is improved. In addition, the cross-linked structure can improve the mechanical strength, and is also very beneficial to inhibition of non-uniform deposition of lithium and generation of lithium dendrites.