911 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 belongs to the field of interface evaporation materials, and provides an interface evaporation material loaded with PDA / rGO photo-thermal hydrogel and a preparation method of the interface evaporation material. The PDA / rGO photo-thermal hydrogel loaded interface evaporation material is composed of a sponge material and PDA / rGO photo-thermal hydrogel loaded on the sponge material, and the PDA / rGO photo-thermal hydrogel is composed of calcium alginate hydrogel and a polydopamine / reduced graphene oxide composite material loaded in a polymer network of the calcium alginate hydrogel. The polydopamine / reduced graphene oxide composite material is prepared from reduced graphene oxide and polydopamine combined on the surface of the reduced graphene oxide; the interface evaporation material takes a sponge material as a porous skeleton, the PDA / rGO photo-thermal hydrogel is attached to the porous skeleton, and the interface evaporation material has a porous structure. According to the invention, the long-term use stability and evaporation flux of the existing hydrogel-based interface evaporation material can be improved.

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 relates to an organic solid electrolyte for an in-situ curing high-voltage positive electrode, a battery and a preparation method. The organic solid electrolyte is formed by in-situ polymerization of ether monomers, ester monomers, a lithium salt and a solvent through synergistic thermal initiation of double initiators. The electrolyte disclosed by the invention has the advantages that the ester polymer monomer and the ether polymer monomer are blended, and then the two monomers are respectively polymerized in a thermal initiation manner to form mutually crossed macromolecular long chains. The strategy can improve the interface stability of the electrode and the electrolyte and reduce the interface impedance of the electrode and the electrolyte. In the formed polymer network structure, the ester chain segment enhances the mechanical strength and widens the electrochemical window; and the ether chain segment provides flexible and lithium ion transmission channels. Due to the chemical complementarity of the ester monomers and the ether monomers, the overall performance of the composite polymer electrolyte is improved.

The invention relates to a liquid-crystal-based polymer solid electrolyte composition, a liquid-crystal-based polymer solid electrolyte, a preparation method of the liquid-crystal-based polymer solid electrolyte and a lithium metal battery. The liquid-crystal-based polymer solid electrolyte composition comprises a polymerizable nematic liquid crystal monomer, an acrylate monomer, an ionic liquid, a lithium salt, a cross-linking agent and an initiator, the polymerizable nematic liquid crystal monomer comprises a bifunctional liquid crystal monomer. The liquid-crystal-based polymer solid electrolyte composition provided by the invention contains the polymerizable nematic liquid crystal monomer and the acrylate monomer, can form a continuously and directionally arranged polymer network, and provides a path for rapid transportation of lithium ions, so that a lithium metal battery can operate stably.

The invention relates to the field of organic silicon thermal management materials, in particular to a flexible insulating organic silicon thermal management composite material based on a phase change material and a preparation method thereof. The problem that the internal temperature of a battery formed by a common technology cannot be effectively controlled and distributed is solved. Comprising 20%-50% of silicone oil, 0.01%-0.1% of an organosilicon catalyst, 0-25% of a heat conduction filler, 25%-80% of a phase change material, 0%-5% of a flame retardant and 0.01%-0.05% of an inhibitor. The material has excellent mechanical property and heat-conducting property, can be suitable for complex working conditions, and has efficient heat management capability. The product is simple in formula and high in designability, and a polymer network constructed by organic silicon rubber can effectively prevent an internal phase change material from leaking under the action of temperature.

The present invention relates to the technical field of modification of lithium battery current collector materials, and provides a coating material and a preparation method for preventing PET film degradation. The coating material is a film-forming substance made of vinyl pyrrolidone / methyl acrylate / fluorinated ethylene copolymer and a graphene nanosheet as a filler. The main component of the film-forming substance is a polyvinyl pyrrolidone segment, and the relative content of the methyl acrylate segment and the fluorinated ethylene segment is small. In addition, the vinyl pyrrolidone / methyl acrylate / fluorinated ethylene copolymer forms a three-dimensional network structure through cross-linking, and the graphene nanosheet forms a chemical connection with the polymer network through a surface active group. The coating can effectively prevent the lithium battery electrolyte and the catalyst alkoxy lithium from contacting with the PET substrate, thereby preventing the PET substrate from degrading.

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 belongs to the field of compositions of biomedical materials and high-molecular compounds, and provides hydrogel capable of regulating and controlling the redox steady state of a microenvironment as well as a preparation method and application of the hydrogel. A macromolecular network of the hydrogel capable of regulating and controlling the redox steady state of the microenvironment is formed by catechol modified hyaluronic acid, carboxylated chitosan, oxidized dextran and iron ions through a hybridization cross-linking reaction; under physiological conditions, catechol groups in the hydrogel can be subjected to an autoxidation reaction to generate H2O2, and meanwhile, iron ions coordinated on the catechol groups in the hydrogel can catalytically decompose H2O2 into water and oxygen, so that the level of active oxygen in a microenvironment is adjusted. The hydrogel disclosed by the invention can realize bidirectional regulation and control on active oxygen in a pathological microenvironment after myocardial infarction, so that the redox steady state of the pathological microenvironment after myocardial infarction is maintained, and the regeneration and repair capacity of an existing hydrogel material with antioxidant capacity on myocardial tissues after myocardial infarction is improved.

The invention relates to the technical field of hydrogel preparation, in particular to a preparation method of novel biomass hydrogel. The biomass hydrogel prepared by the invention overcomes the problems of poor hygroscopicity and poor recyclability of traditional hydrogel in a low-humidity environment. The cassava starch is oxidized by sodium periodate to prepare dialdehyde starch, so that the hydrophilicity is enhanced; sodium alginate is coated and combined with an epoxy group to covalently bond and fix lithium chloride, so that salt slow release and low-humidity deliquescence are realized; the ink containing the nano carbon material is introduced, so that efficient photo-thermal conversion is realized; meanwhile, after the substances are subjected to three-dimensional crosslinking, a polymer network-shaped gel structure is formed, and gradient drying and rehydration control are combined, so that the porous structure and the mechanical strength are guaranteed. The prepared hydrogel can quickly absorb moisture and efficiently perform photo-thermal evaporation in a low-humidity environment, and is good in recyclability.

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 discloses a nickel-iron alloy precipitation type perovskite catalytic material with excellent ammonia decomposition activity and solid oxide fuel cell performance as well as a preparation method and an application of the nickel-iron alloy precipitation type perovskite catalytic material. The general formula of the catalytic material is La < 0.7 > Sr < 0.2 > Fe < 1-x > Ni < x > O < 3-delta > (0 lt, x is smaller than or equal to 0.3), uniform precipitation of Ni-Fe nano-alloy particles is promoted under a high-temperature condition through B-site nickel doping and A-site defect regulation, ammonia decomposition activity is remarkably improved, and electron-ion mixed conductivity of the material is enhanced. A stable three-dimensional polymer network structure is constructed through batch feeding and a citric acid-sol-gel method, the ammonia decomposition rate of the obtained catalytic material at 600-800 DEG C is close to the equilibrium conversion rate, the power density of a fuel cell is remarkably improved, and the problem that a traditional Ni-based anode is prone to sintering and agglomeration at high temperature is effectively solved. The material is compatible with a plurality of electrolyte systems such as YSZ, GDC and SDC, and is suitable for application scenarios such as a plurality of fuel cell electrodes.

The invention provides a polyurethane epoxy polymer network as well as a preparation method and application thereof, and belongs to the technical field of woven polymer networks, the preparation method comprises the following steps: (1) carrying out reaction on polyalcohol, a small molecule chain extender, diisocyanate and a tridentate ligand to obtain polyurethane; (2) dissolving the obtained polyurethane in an organic solvent, and adding a bivalent palladium compound and a monodentate ligand to carry out a coordination reaction; and (3) adding epoxy resin and a curing agent into the reaction liquid obtained in the step (2), mixing, removing the solvent, and curing to obtain the polyurethane epoxy polymer network. Linear polyurethane and epoxy resin penetrate through each other through palladium coordinated weaving nodes, the mechanical performance and energy absorption capacity of polyurethane and epoxy resin are enhanced through a weaving network, the phase separation trend between two polymers is weakened, the material can bear a higher stress level, the toughness of the material is improved, and the service life of the material is prolonged. And the original strength of the polymer is maintained, and meanwhile, the maximum extensibility and the plastic deformation capacity of the polymer are improved.

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.

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.