735 results about "Polymer network" patented technology

Systems and methods are provided for stabilization of cells and retention of biomolecules therein for further analysis. Block copolymers are inserted into membranes of biological particles, cell membranes or organelles (e.g., organelle membranes) and polymerized to form an intra-biological particle (e.g., intracellular) polymer network.

The invention relates to the field of civil engineering waterproof materials, in particular to a nano bentonite-polymer composite material with high salt tolerance and a preparation method thereof, and the nano bentonite-polymer composite material is especially suitable for a sodium-based bentonite waterproof blanket in a saline soil area or a marine environment, and the preparation method comprises the following steps: (1) preparing nano bentonite lamellar colloidal dispersion liquid; (2) introducing and mixing an electrostatic screening agent and a polymerizable monomer; (3) carrying out in-situ free radical polymerization reaction; and (4) post-treatment and finished product preparation. By constructing a three-dimensional interpenetrating hierarchical structure composed of a covalent grafted polymer network, a physically anchored electrostatic screening agent and a stripped bentonite nanosheet layer, effective protection of a bentonite core anti-seepage unit is realized, so that the adaptability and long-term stability of the material under a complex water quality condition are remarkably improved.

The invention discloses deep eutectic gel polymer electrolyte as well as preparation and application thereof, belongs to the technical field of battery electrolyte, solves the problems of low thermal stability, low ionic conductivity and poor mechanical property in the prior art, and comprises a bimetallic salt-eutectic solvent and a polymer chain which are dynamically crosslinked and constructed, the bimetallic salt-eutectic solvent comprises lithium ions, heterogeneous metal salt and Lewis base, and the polymer chain is formed by free radical polymerization, atom transfer radical polymerization (ATRP) or reversible addition-fragmentation chain transfer radical polymerization (RAFT). According to the invention, the deep eutectic solvent is introduced as a reaction solution, so that the organic gel monomer is subjected to photopolymerization or thermal polymerization in the solution, the elongation at break can reach more than 500%, the organic gel has excellent mechanical stretchability, a polymer network is formed by utilizing a long-chain molecular formula of a polymer chain, the deep eutectic solution is wrapped in the polymer network, and the organic gel has excellent thermal stability; and the good ionic conductivity of the electrolyte is ensured.

The invention relates to a preparation method and application of a three-step method environment-friendly SBS modified asphalt regenerant, and the regenerant is composed of modified bio-oil, functionalized desulfurized rubber, a solubilizer, an anti-oxidation aging agent, an anti-light aging agent, a multi-sulfydryl chain reconstruction auxiliary agent, a reversible thioether cross-linking agent and other components. The matrix and polymer network structure of the aged SBS modified asphalt is repaired through light oil supplement and chemical reaction. The preparation method comprises the following steps: introducing a polar functional group into ultrasonic transesterification modified bio-oil to improve wettability; the surface activity of the desulfurized rubber is improved through plasma low-temperature treatment; high-speed shearing and closed-loop control reaction are combined to realize rubber particle dispersion and network reconstruction; chemical crosslinking and aging regeneration are realized through cooperation of specific components. The prepared regenerant is doped into aged SBS modified asphalt at the temperature of 145-165 DEG C according to the proportion of 4-20 wt% to prepare regenerated asphalt.

The invention discloses a sludge treatment method and system, and relates to the field of solid waste treatment, and the method specifically comprises the following operation steps: S1, multi-frequency resonance pretreatment: destroying a sludge colloid structure through stepped mechanical vibration: collapsing an extracellular polymer network at a low frequency, breaking down microbial cell walls at an intermediate frequency to release intracellular water, pathogenic bacteria are inactivated through a high-frequency cavitation effect; s2, performing electrochemical in-situ flocculation; s3, gradient pressure dehydration; s4, low-temperature mineralization stabilization; and S5, vacuum condensation and recovery. According to the sludge treatment method and system, through stepped low-frequency, medium-frequency and high-frequency mechanical resonance, the colloid structure of the sludge can be directionally damaged, the fluidity of the sludge is remarkably improved, chemical conditioners are remarkably reduced, agent residues and secondary pollution are avoided, pathogens are physically inactivated through the high-frequency cavitation effect, and the treatment effect of the sludge is improved. Micro-nano oxygen bubbles are synchronously generated to strengthen free radical oxidation, and a sterile environment is created for subsequent mineralization.

The invention relates to a self-repairing ionic gel electrolyte, a zinc ion battery and a preparation method and application of the self-repairing ionic gel electrolyte and the zinc ion battery. The ionic gel electrolyte comprises a polymer network, ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate) and movable zinc ions, the polymer network is obtained through a reaction of an anionic monomer 2-acrylamido-2-methyl sodium propanesulfonate and a cationic monomer acryloyloxyethyl trimethyl ammonium chloride, and the movable zinc ions are provided by a zinc tetrafluoroborate hydrate. The zinc ion battery takes the ionic gel as an electrolyte, and a positive film electrode and a negative film electrode are arranged on two sides of the ionic gel. Compared with the prior art, the material not only has excellent mechanical properties and efficient ion transmission capability, but also has the capability of quickly repairing mechanical damage, and the completely broken material can be completely repaired after being contacted for 10 seconds under infrared light irradiation. The prepared zinc ion battery has excellent self-repairing performance, flexible performance and electrochemical performance.

The invention belongs to the technical field of electrolyte materials, and particularly relates to a pH response biopolymer solid electrolyte as well as a preparation method and application thereof. The pH-responsive degradable biopolymer is taken as a main raw material, and one or more functional groups such as pyridine, sulfonic acid, carboxyl, tertiary amine, phosphoric acid and the like are contained. The organic acid and the organic acid salt are selected to adjust the pH value of a medium around the electrolyte, and the contraction / stretching behavior of a molecular chain is influenced by changing the ionization degree of the electrolyte, so that an interpenetrating polymer network structure is formed. The polar functional group of the biopolymer affects the migration behavior of lithium ions under different pH conditions, so that the migration rate and migration quantity of the lithium ions are increased, and the cycle performance of the battery is improved. The electrolyte is suitable for high-performance energy storage devices such as a lithium ion battery, can effectively improve the battery performance, reduces the environmental pollution, and has relatively strong green and environment-friendly advantages.

The invention discloses a multilayer composite solid electrolyte membrane, a preparation method and a prepared solid-state battery, the multilayer composite solid electrolyte membrane sequentially comprises a three-dimensional polymer networked solid electrolyte, a LiPON layer and a polydopamine layer, the thickness of the three-dimensional polymer networked solid electrolyte is 20-40 [mu] m, and the thickness of the polydopamine layer is less than 100 nm. By adopting the synergistic effect of the silane coupling agent modified LLZO and the degraded chitosan, a better ion transmission coordination effect can be provided, and the efficiency of an ion channel is improved. The dendritic crystal inhibition efficiency is improved, obvious cracks are avoided after 1000 times of circulation, the composite material is applied to a solid-state battery, the cycle life of the battery is prolonged, and the capacity retention rate is 95% after 1000 times of circulation. The mechanical toughness of the solid electrolyte is improved, and the elongation at break can reach 130%. A water-phase solvent is used in the whole preparation process, use of an organic solvent is avoided, energy consumption is reduced by 40%, no VOC is discharged in the whole process, and the method is green, safe and environmentally friendly.

The invention discloses a preparation method and application of a membrane separation material based on external field enhanced water isotope separation. The preparation method comprises the following steps: firstly, pre-enriching a precursor component containing a polymerizable monomer, a cross-linking agent and a photoinitiator in a confinement pore channel of a nano-porous carrier through an impregnation-encapsulation strategy; and then, through in-situ photo-initiation polymerization, a covalent cross-linked functional polymer network is constructed in the pore channel, and stable packaging of the polymer is realized. In the water isotope separation period, external field conditions are regulated and controlled, the molecular conformation of a polymer chain is accurately controlled, and the separation performance is optimized. According to the invention, by virtue of an external field strengthening technology, the intramolecular / intermolecular interaction is destroyed, and the macromolecular chain is converted from contraction to stretching, so that more functional sites are exposed, and the water isotope separation material designed by the invention has a huge practical application prospect.

The invention relates to a bionic strong acid-resistant nanofiltration membrane and a preparation method thereof, and the bionic strong acid-resistant nanofiltration membrane comprises a porous support layer and an active separation layer formed on the surface of the porous support layer, the active separation layer is a polymer network layer formed by carrying out interfacial polymerization reaction on a water-phase solution containing polyamine and an oil-phase solution containing polyacyl chloride on the surface of the porous support layer. The water-phase solution and / or the oil-phase solution also contains a bionic amphiphilic phosphate compound, the bionic amphiphilic phosphate compound participates in interfacial polymerization reaction through an active functional group in a molecular structure of the bionic amphiphilic phosphate compound, and the phosphate structure of the bionic amphiphilic phosphate compound is covalently connected into a skeleton of the polymer network layer. The preparation method has the beneficial effects that the bionic amphiphilic phosphate compound with a hydrophilic phosphate head, a hydrophobic alkyl tail and a reaction site is synthesized, so that the bionic amphiphilic phosphate compound is spontaneously and orderly arranged on a water / oil interface and participates in interfacial polymerization, the film forming uniformity is improved, the pore size distribution is narrowed, and the intelligent response characteristic is given to the film.

The invention provides a self-healing silicon-carbon composite negative electrode material and a preparation method and application thereof. The self-healing silicon-carbon composite negative electrode material comprises a core material formed by silicon-carbon composite particles and a shell layer formed by a self-healing solid electrolyte coating layer, the self-healing solid electrolyte coating layer is a polymer network containing dynamic covalent bonds, and lithium salt is doped in the polymer network. According to the invention, through reversible fracture and recombination of dynamic covalent bonds, microcracks generated by volume expansion of silicon are automatically repaired in situ.

Microcapsule compositions as disclosed comprising a microcapsule dispersed in an aqueous phase. The microcapsule has a microcapsule core and a microcapsule wall encapsulating the microcapsule core. The microcapsule core contains an active material. The microcapsule wall is formed of a polymeric network comprising a first moiety derived from a protein, and a second moiety derived from a multi-functional electrophile. Also disclosed are preparation methods and consumer products containing the microcapsule compositions.

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 discloses a gas separation membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The gas separation membrane comprises a separation layer comprising a network and PTI nanosheets dispersed in the network, the network comprising at least one of a biopolymer network and a chemical polymer network; selectively, the device further comprises a supporting layer which is arranged below the separation layer and is combined with the separation layer. The preparation method of the gas separation membrane comprises the following step A or step B: step A: enabling raw materials of PTI nanosheets and networks to form a membrane on the surface of polymer hydrogel to obtain the gas separation membrane; and step B, enabling the PTI nanosheet and the network raw material to form a membrane on the surface of the material of the support layer to obtain the gas separation membrane. The gas separation membrane provided by the invention is an N2 preferential permeation membrane, and has relatively high N2 permeation rate and relatively high N2 / CO2 selectivity.

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.

The present invention discloses a method for preparing a high-ionic conductivity cement-based structured electrolyte and the electrolyte, comprising: mixing a polymer solution, cement, and fine sand to obtain a polymer-cement slurry; subjecting the polymer-cement slurry to low-temperature, sealed curing, and then allowing it to stand at room temperature to obtain a cement-based structured electrolyte. The present invention utilizes a controlled phase separation technique to enable elastic phase separation of the polymer network prior to cement hydration. During the hydration process, the cement adaptively forms the backbone of the polymer network, resulting in a good interface between the two, capable of forming continuous, high-conductivity ion channels. The preparation process is simple to operate and highly reproducible.

The invention relates to the technical field of adhesive tapes, in particular to a convex ball-mounting wafer thinning adhesive tape, a preparation method thereof and a wafer thinning machine, the thinning adhesive tape comprises a base material film, a viscosity-reducing adhesive layer and a release film; the preparation method comprises the following steps: preparing a first polymer network; preparing a second polymer network; the adhesive composition is obtained; forming a liquid film; covering the base material film on a liquid film; covering a release film on the upper surface of the fixed module in the wafer thinning machine; in a wafer thinning machine, the wafer with the base material film is installed on a release film, and heating treatment is carried out on the laminated wafer so as to directly form a solidified thinning adhesive tape on the wafer; by constructing a thermal / optical dual-curing interpenetrating polymer network with a dual visbreaking mechanism and combining with a special preparation method of the thinning adhesive tape in a thinning machine, the probability that a convex ball-mounting wafer generates microcracks or warps in a specific area when the adhesive tape is used for thinning operation is reduced.

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.

The invention relates to composite hydrogel for tissue repair as well as a preparation method and application of the composite hydrogel. The composite hydrogel is prepared from a methacrylated acellular matrix, nano clay (LAP), a photoinitiator, carboxymethyl chitosan (CMCS) and water. The acellular matrix is modified through methylacryloylation, and a polymer network is reinforced by combining nano-clay, so that the mechanical strength is improved; and carboxymethyl chitosan adjusts the degradation rate, constructs a pore structure and endows antibacterial and anti-inflammatory functions. The preparation method comprises the following steps: dissolving the methacrylated acellular matrix in the PBS containing the photoinitiator, dissolving the carboxymethyl chitosan in ultrapure water, mixing, and carrying out illumination cross-linking curing. When the composite hydrogel is applied to small intestine tissue engineering, a small intestine defect part can be filled with the composite hydrogel, photo-crosslinking curing is performed to form a stent, the degradation period is matched with the small intestine regeneration period, and the antibacterial rate is gt; the cell toxicity is 0 level, a good microenvironment can be provided for cells, tissue repair can be promoted, and the compound can also be used for preparing pharmaceutical compositions for treating small intestine related diseases.

The invention discloses a high-flame-retardant bio-based aerogel material and a preparation method thereof, and belongs to the technical field of flame-retardant bio-based aerogel. The high-flame-retardant bio-based aerogel material prepared by the preparation method disclosed by the invention is prepared from the following raw material components in parts by mass: 10 parts of a bio-based flame-retardant filler with a porous structure, 40 to 50 parts of a hydrophobic siloxane monomer, 12.4 to 12.6 parts of an ammonium phytate solution, 6.2 to 6.3 parts of guanosine, 31.1 to 31.4 parts of cellulose nanofibers and 0.01 to 0.02 part of benzaldehyde-polyethylene glycol-silane, the preparation method comprises the following steps: firstly, carrying out hydrolytic polycondensation on a bio-based flame-retardant filler with a porous structure and a hydrophobic siloxane monomer to form a siloxane polymer network with the bio-based flame-retardant filler as a branching center; then adding cellulose nanofibers, guanosine and an ammonium phytate solution, and performing freeze casting-freeze drying-heating post-treatment to obtain the composite material. Wherein the bio-based flame-retardant filler is obtained by compounding a porous cuttlefish ink carbon quantum dot composite material with phytic acid siloxane and trimethoxy (3-(4-nitrophenoxy) propyl) silane.

The invention provides a monomer and a preparation method thereof, a gel electrolyte precursor, a gel electrolyte, a battery and electric equipment. The monomer disclosed by the invention has a structure of a formula 1 # imgabs0 #, the monomer disclosed by the invention has an acrylate fragment and a ureido pyrimidone fragment, unsaturated carbon-carbon double bonds in the acrylate fragment can be subjected to in-situ polymerization to form a polymer network structure, and flowing electrolyte is bound in the network; and the ureido pyrimidone can realize physical cross-linking and perform self-healing repair on the gel network through multi-hydrogen-bond interaction, so that the liquid retention reliability of the battery is effectively improved, the liquid leakage risk is reduced, and the safety performance of the battery is enhanced.

The invention provides a thermal response hydrogel construction method based on solid-liquid interface repulsive force and water content, which comprises the following steps: establishing a coarse graining model of a thermal response polymer network and a water molecule system, and constructing a three-dimensional polymer gel network by adjusting the number of polymer chain monomers and the proportion of a cross-linking agent; constructing a simulation box according to the network geometric dimension and filling the simulation box with water beads; defining interaction parameters among beads under the dissipative particle dynamics model, performing molecular dynamics simulation, counting the mass center of a polymer skeleton and the number of water beads adjacent to an interface, and calculating the equilibrium moisture content; establishing a solid-liquid interface model, and calculating an equilibrium distance and interaction energy between a water bead plane and a polymer skeleton plane at the adsorption temperature; the network polymerization degree is optimized by adjusting the number of polymer chain monomers, and the optimal design of the thermal response desorption performance is achieved. The method provided by the invention is suitable for macroscopic hydrogel structure evaluation, can quickly obtain equilibrium moisture content and interfacial interaction energy, and guides reasonable proportioning and preparation of the hydrogel.

The invention discloses a method for synthesizing eutectic gel by in-situ extraction of lignin, and belongs to the technical field of gel materials.The method comprises the steps that choline chloride and acrylic acid are mixed, heated in an oil bath and stirred, and a eutectic solvent is obtained; cooling the solvent, adding dried and crushed wood powder, heating in an oil bath, extracting to obtain a mixed solution, and centrifuging to obtain supernate; adding a cross-linking agent and an initiator into the supernate, heating, stirring, and cooling to room temperature to obtain a pre-polymerized solution; and pouring the pre-polymerized liquid into a polytetrafluoroethylene mold, and carrying out ultraviolet curing to obtain the target gel. According to the method, the natural structure and active groups of the lignin are reserved to the maximum extent, the method is low-carbon, energy-saving, green and sustainable, in-situ lignin and a polymerization network cooperate, the gel is endowed with higher mechanical strength, environmental stability and functional diversity, and the limitation of existing lignin doped gel is broken through.

The invention discloses a polyphosphazene flame-retardant electrolyte, a lithium ion battery containing the electrolyte and a preparation method of the lithium ion battery, and belongs to the technical field of lithium ion batteries. The electrolyte comprises a lithium salt, an organic solvent, a cosolvent, an additive, a cross-linking agent, a polymer monomer and a polymerization initiator, and is prepared in an in-situ or ex-situ polymerization mode. According to the polymer electrolyte or gel electrolyte provided by the invention, on the basis of various flame-retardant mechanisms of a phosphazene structure and a polymer network structure of a three-dimensional network structure, the overall thermal stability is improved, the intrinsic safety of a battery is improved, the safety risk caused by abuse, overcharge and overdischarge, needling, collision and the like is reduced, and the service life of the battery is prolonged. And a new direction is provided for further developing a multi-element composite flame-retardant material and promoting the safety of a lithium ion battery.

The invention relates to the technical field of battery thermal management, and discloses a wide-temperature-range hydrogel for battery thermal management and a preparation method and application thereof, and the preparation method comprises the following steps: adding polyvinyl alcohol and gelatin into water, heating, stirring and dissolving; then adding sodium alginate and polyhydric alcohols, and continuously stirring; then adding polyacrylic acid, and continuously stirring; adding a cross-linking agent, uniformly stirring, pouring into a mold, degassing, preserving heat, and standing to form hydrogel; immersing the obtained hydrogel into a H2SO4 aqueous solution, vibrating until the hydrogel is completely swelled, heating in a drying oven to constant weight, and washing with deionized water to be neutral; strong hydration groups are introduced into the hydrogel to establish a strong connection structure between water molecules and a polymer network, the water molecules are firmly fixed in the polymer network of the hydrogel to prevent escaping or icing, and a sacrificial network structure is formed through hydrogen bonds to effectively maintain the flexibility of the hydrogel in a wider temperature range, so that the water molecules are effectively prevented from escaping or icing. The thermal management capability in a battery pack is improved.

The invention discloses a preparation method of a modified polyacrylic acid interpenetrating network battery adhesive. The modified polyacrylic acid has dynamic adaptability and structural stability by designing a dynamic cross-linked network system with interpenetrating and intertwining polymer networks, is mainly prepared by adopting an ultraviolet light polymerization means, and aims to solve the problem of structural failure caused by silicon-carbon volume expansion. According to the method, the comprehensive mechanical property of the adhesive is remarkably improved, expansion cracking of the silicon-carbon negative electrode is effectively inhibited, and a technical support is provided for the silicon-carbon negative electrode with high stability, good rate capability, good safety and high capacity.

Specifically, firstly, montmorillonite (MMT) powder is stripped into a nanosheet layer by using an ultrasonic dispersion technology, a two-dimensional layered structure of the nanosheet layer forms rich nanoscale ion channels, and an efficient path is provided for ion directional migration in salinity gradient power generation; meanwhile, after the cellulose is stripped and dispersed by a DMSO solution, a uniform polymer network is formed, the uniform polymer network is used as a substrate material to improve the mechanical strength of the film, and the interfacial ion adsorption and conduction capability is optimized through hydrophilic groups. When the MMT nanosheet and the cellulose suspension are mixed, the MMT nanosheet and the cellulose suspension form an interpenetrating network structure through physical winding and electrostatic interaction, ordered stacking is achieved through vacuum filtration, and finally the composite film with both ion selectivity and structural stability is formed on the substrate. The preparation process is high in material adaptability, green and controllable in preparation process, high in competitiveness in large-scale production and practical application and beneficial to popularization.

The invention discloses a fluorinated polymer and application thereof in an electrode protection layer and a solid electrolyte, and belongs to the technical field of lithium metal secondary batteries, and the fluorinated polymer is obtained by reacting acrylate functionalized polyethylene glycol, HFBA and an initiator. When the fluorinated polymer is used as a lithium metal negative electrode protective layer, the LiFePO4 / Li total battery protected by the polymer shows more excellent cycle performance compared with an unprotected total battery. And the battery is stable in cycle performance, high in capacity retention rate and low in capacity fading speed. When the fluorinated polymer is applied to the solid-state electrolyte, the polymer solid-state electrolyte in which a polymer network wraps an ionic conductive plastic crystal can be formed through an in-situ reaction, so that the growth of Li dendritic crystals is effectively inhibited, and the stability of the polymer electrolyte and a lithium negative electrode is ensured. Moreover, the solid electrolyte can be adapted to a high-nickel ternary positive electrode material, and a thought is provided for realizing a stable and safe high-energy-density battery.

The invention discloses a rigid-flexible coupling all-solid-state battery suitable for a high-expansion electrode and a preparation method thereof.The all-solid-state battery comprises a composite positive electrode, an all-polymer electrolyte layer and a composite negative electrode which are sequentially assembled, and in-situ polymerization polymer electrolyte networks are constructed in the composite positive electrode and the composite negative electrode; the all-polymer electrolyte layer comprises a polymer electrolyte network constructed by in-situ polymerization, a lithium salt, a plasticizer and a fast ion conductor ceramic filler; polymer electrolyte networks in the composite positive electrode, the composite negative electrode and the all-polymer electrolyte layer are of a double-network structure consisting of a rigid polymer skeleton and a flexible cross-linked polymer network. Through the integrated structural design of the all-polymer electrolyte and the composite electrode, the ionic conductivity, the interface stability, the cycle performance and the safety performance are synergistically improved, and the requirements of high energy density and high-safety energy storage are met.

The present invention provides a polyurethane epoxy polymer network and its preparation method and application. The present invention belongs to the technical field of braided polymer networks. The preparation method comprises: (1) reacting a polyol, a small molecule chain extender, a diisocyanate and a tridentate ligand to obtain a polyurethane; (2) dissolving the obtained polyurethane in an organic solvent, adding a divalent palladium compound and a monodentate ligand to carry out a coordination reaction; (3) adding an epoxy resin and a curing agent to the reaction solution obtained in step (2), removing the solvent after mixing, and curing to obtain a polyurethane epoxy polymer network. In the present invention, linear polyurethane and epoxy resin are interpenetrated through palladium-coordinated braided nodes, and the braided network is used to enhance the mechanical properties and energy absorption capacity of the polyurethane and epoxy resin, reduce the phase separation tendency between the two polymers, enable the material to withstand higher stress levels, improve its toughness, and improve its maximum elongation and plastic deformation capacity while maintaining the original strength of the polymer.