337 results about "Polymer gel" patented technology

The invention relates to a long-term implantable gel composite woven medical catheter and a forming method thereof, the long-term implantable gel composite woven medical catheter comprises an inner film and a gel layer which are sequentially arranged from inside to outside, and a woven body is embedded in the gel layer. Compared with the prior art, the invention has the following beneficial effects: by introducing the PTFE inner layer, the reinforced braid layer and the polymer gel outer layer, perfect combination of internal lubrication, mechanical reinforcement and external functionalization of the catheter is realized; the novel method combining extraction, rapid cooling and vacuum freeze drying is adopted, the production efficiency is improved, the outer layer of the catheter is endowed with a unique microstructure, and the drug loading capacity and biocompatibility of the catheter are enhanced.

The invention relates to a functional liquid metal-based temperature-responsive hydrogel material and a preparation method thereof, and belongs to the technical field of functional polymer hydrogel materials.The preparation method comprises the following steps that a temperature-responsive hydrogel composite material comprises a hydrophobic association polymer gel and a hydrogel monomer, the hydrophobic association polymer gel comprises a hydrophobic association polymer monomer, a functional filler and an initiator. The functional filler is liquid metal gallium with the edge modified by graphene oxide, and has triple functions: firstly, the functional filler is used as an electrostatic crosslinking node to form a crosslinking network with anionic ionic liquid; secondly, dynamic repair is promoted, and Ga < 3 + > is released to promote dynamic bond recombination. In addition, as a functional filler, the hydrogel is endowed with excellent photo-thermal and electro-thermal conversion performance, and the multi-stimulus response capability is enhanced. The composite material realizes structural assembly by means of hydrophobic association, shows reversible phase change and repeated self-assembly characteristics under various stimuli such as photo-thermal, electric heating, direct heating and the like, and has wide application potential.

The invention provides a preparation method of super absorbent resin, and relates to the technical field of super absorbent resin. The preparation method comprises the following steps: diluting acrylic acid with water, and adding alkali liquor for neutralization to obtain a neutralized solution; mixing an emulsifying agent, a thickening agent and foaming carbonate to obtain a foaming promoting auxiliary agent; adding a cross-linking agent, a photoinitiator and a temperature initiator into the neutralization solution to obtain a polymerization mother solution; uniformly mixing a foaming promoting auxiliary agent with the polymerization mother liquor, and initiating polymerization of the polymerization mother liquor under a UV illumination condition to obtain acrylate polymer gel; drying the acrylate polymer gel, and crushing and screening to obtain basic particles; and spraying a surface cross-linking treatment liquid on the surfaces of the basic particles, initiating a surface cross-linking reaction of the basic particles through heat treatment, and adding an inert filler after the surface cross-linking reaction to prepare the super absorbent resin finished product particles. The super absorbent resin disclosed by the invention has the characteristics of high reaction efficiency, high liquid absorption speed, good liquid passing performance, excellent reverse osmosis resistance and the like.

The invention belongs to the field of moisture absorption materials, and discloses a temperature-sensitive hydrophilic-hydrophobic reversible conversion low-temperature regenerated moisture absorption material and a preparation method and application thereof. The temperature-sensitive hydrophilic-hydrophobic reversible conversion low-temperature regenerated moisture absorption material comprises a polymer matrix and inorganic salt, the polymer matrix is a copolymer of a temperature-sensitive monomer and a hydrophilic monomer, and the inorganic salt is loaded inside and on the surface of the polymer matrix. The hygroscopic material prepared by the method has reversible transition from a hydrophilic state to a hydrophobic state near the lowest phase transition critical temperature; the material is in a hydrophilic state during moisture absorption and is in a hydrophobic state during desorption, and the material has excellent moisture absorption performance and low-temperature desorption regeneration performance; the lowest phase transition critical temperature can be adjusted according to actual requirements to adapt to different moisture absorption application scenes, the polymer gel moisture absorption material is a ternary system, the three components achieve breakthrough improvement of the moisture absorption-desorption performance through the multi-stage synergistic effect, and a new normal form is provided for environment self-adaptive material design.

The invention belongs to the technical field of lithium ion battery materials, and discloses a semi-solid electrolyte and a lithium ion battery. The semi-solid electrolyte comprises an anhydrous solvent, a lithium salt, a functional additive and a polymer gel network, the polymer gel network is obtained by carrying out polymerization reaction on the following monomers in percentage by mass: 40 to 70 percent of acrylate monomer, 30 to 50 percent of polyether monomer and 1 to 10 percent of anthraquinone modified crosslinking monomer; the anthraquinone modified crosslinking monomer has a structural formula as shown in a formula (1). The anthraquinone modified crosslinking monomer is adopted to modify a polymer gel network of the semi-solid electrolyte, so that the ionic conductivity of the semi-solid electrolyte can be remarkably improved, meanwhile, the impedance with an electrode interface can be remarkably reduced, and a lithium ion transmission path is improved. Therefore, the electrochemical performance of the semi-solid lithium ion battery is obviously improved.

The invention relates to the technical field of oilfield chemistry and high-temperature and high-salt oil reservoir profile control and water shutoff, in particular to a preparation method, a product and application of polymer gel particles with enhanced mechanical properties through a double-crosslinking domain structure. The preparation method comprises the following steps: dissolving a monomer, a cross-linking agent and an initiator in water, and carrying out free radical polymerization reaction to obtain polymer hydrogel; and drying the polymer hydrogel to obtain the polymer gel particles, the monomers comprise acrylamide, acrylic acid, N-(hydroxymethyl) acrylamide and 2-acrylamide-2-methylpropanesulfonic acid; the cross-linking agent comprises methacrylic acid esterified lignosulfonate and / or N, N '-methylene bisacrylamide. The preparation method disclosed by the invention is simple, and the polymer gel particles prepared by utilizing the method have a unique double-crosslinking domain structure, have excellent mechanical properties and excellent temperature resistance and salt tolerance, and are suitable for profile control and water shutoff of high-temperature and high-salt oil reservoirs.

A lithium battery comprising an anode, a cathode, a solid-state electrolyte, an interface enhancer composition in ionic communication with the anode and the cathode, wherein (a) the electrolyte comprises a solid polymer, a polymer gel, an inorganic solid-state, or a polymer / inorganic composite electrolyte; (b) the interface enhancer composition comprises a lithium salt, a liquid solution comprising an organic solvent or ionic liquid and a lithium salt dissolved therein, a polymer containing a lithium salt dissolved or dispersed therein, or a combination thereof; (c) the cathode comprises a cathode active layer comprising particles of a cathode active material, a conductive additive, an optional binder, and pores occupying 1% to 40% by volume of the cathode active layer and the interface enhancer resides in 30% to 100% of the pores; and (d) the interface enhancer is present between the solid-state electrolyte and the cathode and between the solid-state electrolyte and the anode.

The invention provides a nano oil-water phase permeability regulator and a preparation method thereof. The nano oil-water phase osmotic adjusting agent is prepared from the following raw materials in percentage by mass: 1.5 to 3 percent of scleroglucan pre-crosslinked particles, 2.5 to 5 percent of nano modified acrylamide, 0.2 to 3 percent of initiator, 0.2 to 2 percent of formaldehyde, 0.3 to 5 percent of diethanol amine, 0.5 to 5 percent of hydrochloric acid and the balance of water. Due to the scleroglucan pre-crosslinked particles, the thermosensitivity and the biological environmental protection property of the gel are improved, and the performances of salt resistance, temperature resistance, durability and the like are improved. Meanwhile, nano-modified acrylamide is obtained by grafting and modifying the surfaces of SiO2 particles and introducing cationic links and hydrophilic groups by adopting a silane coupling method, so that the nano-modified acrylamide has the adsorption and film-forming effects of polymer gel and a nano material, and the effect that 1 + 1 is greater than 2 is achieved. After being heated by the formation temperature, the particles expand to take the effects of occupying space, blocking and controlling water. The oil-water relative permeability of an oil layer is improved, water plugging and oil plugging are achieved, and important significance is achieved for plugging and controlling water in the extra-high water cut period and improving the productivity of an oil well.

The invention belongs to the technical field of petroleum and natural gas extraction, and discloses polymer gel for CO2 flooding and channeling sealing of a high-temperature oil reservoir and a preparation method of the polymer gel. The gel component is prepared from 0.4 wt% to 1 wt% of partially hydrolyzed polyacrylamide, 0.5 wt% to 2 wt% of phenolic resin, 0.2 wt% to 0.5 wt% of aluminum citrate, 0.2 wt% to 0.8 wt% of thiourea and the balance of water. The plugging agent has the characteristics of temperature resistance, acid resistance and the like, can effectively plug gas channeling channels such as heterogeneous high-permeability zones and natural / artificial fractures in CO2 drive oil reservoirs, and achieves the purposes of controlling gas channeling and enlarging gas drive waves and volumes.

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 belongs to the technical field of photovoltaics, and particularly relates to a fiber gel solar cell based on a double-helix electrode structure and a preparation method of the fiber gel solar cell. A fiber photo-anode and a fiber counter electrode are spirally arranged in parallel and placed in a flexible transparent packaging tube, and the two fiber electrodes are tightly wrapped by a polymer gel electrolyte with an axial pore channel to form a fiber gel solar cell with a double-spiral fiber electrode structure; the preparation method comprises the following steps: firstly, preparing a polymer gel framework with an axial pore channel structure on a fiber electrode through in-situ polymerization, and then introducing an electrolyte solution by utilizing an axial pore channel and fully permeating and combining the electrolyte solution with the gel framework to form the polymer gel electrolyte. According to the invention, the electrochemical performance of the fiber gel solar cell can be effectively improved, and a high-performance gel electrolyte system for the fiber solar cell is widened, so that more high-efficiency quasi-solid fiber solar cells are developed.

The invention relates to pre-crosslinked zwitterionic nano composite gel temporary plugging particles and a preparation method thereof, and belongs to the technical field of oilfield chemical temporary plugging. The temporary plugging particles comprise the following raw materials: sodium carboxymethyl cellulose, a nano material, a zwitterionic monomer, a cationic monomer, a temperature-resistant monomer and a composite cross-linking agent. The preparation method comprises the following steps: dissolving and stirring the sodium carboxymethyl cellulose, the nano material, the anionic monomer, the zwitterionic monomer, the temperature-resistant monomer, the acrylamide and the cross-linking agent, and heating to 70 DEG C; adding an initiator into the solution, stirring and reacting for 3 hours in a nitrogen atmosphere, and cleaning, cutting, drying and grinding the obtained polymer gel to obtain the pre-crosslinked zwitterionic nano composite gel temporary plugging particles. The temporary plugging particles prepared by the invention are relatively stable in quality after being aged for 30 days at the high temperature of 160 DEG C, and can absorb 33.21 g / g of potassium formate water with the concentration of 1.55 g / cm < 3 > within one day.

The invention belongs to the field of functional porous materials, and particularly relates to novel N, S polycyclic aromatic hydrocarbon molecules and preparation thereof, preparation of porous organic porous polymer gel constructed by using the polycyclic aromatic hydrocarbon molecules and application of the porous organic porous polymer gel in photocatalytic water oxidation to generate hydrogen peroxide. The invention provides an N, S polycyclic aromatic hydrocarbon molecule which has a structural formula as shown in a formula I. The invention provides a novel N, S polycyclic aromatic hydrocarbon molecule and a synthesis method thereof. The porous organic polymer gel is synthesized by taking the porous organic polymer as a construction unit, and the synthesized gel has excellent processability and photoelectric activity, so that the gel shows an excellent rate of preparing hydrogen peroxide through photocatalytic water oxidation when being used as a photocatalytic material.

The invention relates to the technical field of food safety detection, in particular to solid-phase extraction filler for detecting pesticide residues in food and a preparation method and application thereof.The solid-phase extraction filler comprises a magnetic filler core and a selective adsorption layer wrapping the magnetic filler core; wherein the interior of the magnetic filler core at least comprises magnetic particles and a coating layer for improving the stability of the magnetic particles; the selective adsorption layer is composed of a porous organic framework material which is chemically grafted outside the coating layer; and a temperature-sensitive polymer gel layer also covers the outer part of the selective adsorption layer. According to the solid-phase extraction filler disclosed by the invention, through an innovative hierarchical structure design, the extraction of trace pesticide residues in food can be effectively improved, the extraction difficulty is reduced, and the extraction efficiency and the extraction selectivity are improved.

The invention belongs to the technical field of polymer gel materials, and discloses ionized water gel as well as a preparation method and application thereof. Raw materials of the ionized water gel comprise a precursor solution and water, the precursor solution is an acidic hydrophilic ionic liquid and a vinyl monomer containing a hydrophilic group, and the water is used for adjusting the interaction between the acidic hydrophilic ionic liquid and the vinyl monomer. The ionized hydrogel is prepared through a water-mediated polymer network recombination strategy, the technical problems that the toughness and hysteresis of a traditional gel material are difficult to balance and the comprehensive performance is insufficient are effectively solved, the problem that the toughness and hysteresis of the traditional gel material are mutually restricted is broken through, and the prepared ionized hydrogel has good mechanical deformation resistance when bearing mechanical deformation. According to the material, energy can be effectively dissipated to prevent breakage, energy loss and signal distortion caused by lagging can be reduced, the reliability of the material in dynamic mechanics application is greatly improved, and for example, the material can still work stably when a wearable device deforms frequently.

The invention relates to the technical field of polymer gel materials, in particular to silk fibroin hyaluronic acid double-network gel for filling nasolabial grooves and a preparation process of the silk fibroin hyaluronic acid double-network gel. According to the invention, the tannic acid, the cinnamyl aldehyde, the lidocaine and the mesoporous polydopamine nanoparticles are added, so that the composite antibacterial material is prepared. The preparation method comprises the following steps: adding hyaluronic acid, sodium periodate, propylated chitosan and a photoinitiator 2959 to obtain a solution A; adding silk and sodium alginate to obtain a solution B; mixing the solution A and the solution B, fully stirring, adding a composite antibacterial material, and continuously stirring to obtain a mixed cross-linking solution; sequentially carrying out ultrasonic defoaming, freezing overnight and freeze drying on the mixed cross-linking solution to obtain aerogel; and dipping the aerogel in a calcium chloride solution, and carrying out ultraviolet crosslinking, water washing and freeze drying to obtain a finished product. The finished product prepared by the invention has excellent antibacterial property and high crosslinking degree, so that the finished product has wide application prospects in the technical field of polymer gel materials.

The invention provides a high-strength low-molecular polymer gel system as well as a preparation method and application thereof. The polymer gel system is prepared from the following raw materials: 4 to 6 percent of polymer emulsion, 0.4 to 0.8 percent of phenolic aldehyde crosslinking agent, 0 to 0.3 percent of catalyst, 0.2 to 0.5 percent of deoxidant, 0.2 to 0.4 percent of stabilizer and the balance of water, the polymer emulsion is formed by copolymerization of an acrylamide monomer and a sodium p-styrenesulfonate monomer, and the molar weight of the sodium p-styrenesulfonate monomer accounts for 8-15% of the total amount of the monomers. According to the polymer gel plugging agent system, the low-molecular polymer with good heat resistance is selected, the dosage of the polymer is high, the viscosity of a gel forming solution is low, good injectability is achieved in the deep part of a stratum, and the polymer gel is high in gel forming strength, large in elasticity modulus after gel forming, good in stability at high temperature and capable of effectively plugging large pore channels; and the steam channeling sealing effect of the heavy oil reservoir is improved.

The invention relates to a flexible breathable zinc air battery based on a polypropylene non-woven fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out hydrophilic treatment on the polypropylene non-woven fabric; immersing a hydrophilic polypropylene non-woven fabric into the carbon nanotube dispersion liquid, and drying to obtain a carbon nanotube non-woven fabric; the method comprises the following steps: coating a carbon nanotube non-woven fabric with ink containing a copper / cobalt double-atom doped oxygen electrocatalyst, and drying to obtain a breathable air cathode; the carbon nano tube non-woven fabric is electroplated and loaded with zinc, and an air-permeable galvanized anode is obtained; the preparation method comprises the following steps: immersing hydrophilic polypropylene non-woven fabric into a polymer gel solution, taking out the hydrophilic polypropylene non-woven fabric to form non-woven fabric-based polymer gel under ultraviolet irradiation, soaking the non-woven fabric-based polymer gel into a mixed solution of KOH and Zn (Ac) 2, and taking out the non-woven fabric-based polymer gel to obtain a non-woven fabric-based alkaline gel polymer electrolyte; and (3) sequentially laminating and pressing the anode, the polymer electrolyte and the cathode, and then packaging. The flexible, breathable, waterproof and tailorable characteristics of the zinc-air battery are realized.

The invention discloses hydrogel for improving satiety as well as a preparation method and application of the hydrogel, and relates to the technical field of polymer gel preparation. The preparation method of the hydrogel for improving satiety comprises the following steps: mixing a cellulose derivative and water, adding a crosslinking aid, and fully and uniformly mixing to obtain a first solution; adding pectin into the first solution, fully and uniformly mixing, and adjusting the pH value to 7.5-8.0 to obtain a second solution; carrying out physical cross-linking on the second solution under ultrasonic treatment to obtain a first cross-linked substance; adding pectin into the first cross-linked substance, and continuously stirring to obtain gel; and removing moisture to obtain the hydrogel for improving satiety. The prepared hydrogel is good in mechanical performance and high in water absorption capacity, the satiety is improved through water absorption expansion, the good weight reduction effect is achieved, and meanwhile the hydrogel has the good effect of adjusting intestinal flora.

Described herein are compositions and uses for an adaptive polymer system. Components of the polymer are used to balance smart behavior around an environmental trigger point with desirable material properties and formulation additives. The APS allows engineering of smart materials and products with desired smart behaviors and material properties on both sides of the trigger point for that behavior. When applied to solvent-based polymer gels, the APS allows for precise control of cloud point behavior and material properties that enable a range of consumer, biomedical, and industrial applications.

The invention relates to a method for preparing a gel material from phosphoric acid-based geopolymer composite plant fiber, which comprises the following steps: (1) reacting phosphoric acid serving as an acid activator with metakaolin, and adding phosphoric acid, water and metakaolin into a mixing stirrer to react for 30 minutes; (2) adding the Chinese fir fibers into the geopolymer gel, uniformly stirring for a certain time, putting the mixed slurry into a rectangular mold of 220 * 50 * 20mm, putting the rectangular mold on a hot press for compression molding, and setting the temperature of the hot press to be 60 DEG C and the pressure of the hot press to be 45MPa; and (3) putting the composite material obtained by pressing and the mold into a drying oven at 60 DEG C for curing, demolding after 1 day, putting the demolded sample into a sample bag for sealing, continuously curing in the drying oven at 60 DEG C for 3 days, removing the sample bag, then curing for 3 days, and then testing the performance of the sample. When the molar ratio of H2O to Al2O3 is 10, the molar ratio of H3PO4 to Al2O3 is 2.0 and the fiber content is 10%, the static bending intensity of the prepared geopolymer composite material reaches the optimal value of 13.75 MPa, and the internal bonding strength also reaches the optimal value of 2.17 MPa. The static bending intensity of the sample after freezing and thawing cycle can still reach 10.87 MPa to the maximum, and the frozen and thawed sample does not have edge missing, corner missing and cracking.

The present invention discloses a multi - hierarchical network aerogel with heat insulation and its preparation method, belonging to the technical field of aerogel composite materials. Based on the sol - gel method and physical adsorption method, the present invention obtains a multi - hierarchical network hybrid aerogel heat - insulation material containing a long - range continuous micron - pore sponge skeleton, a macroporous polymer cross - linked skeleton and a mesoporous silica network through supercritical carbon dioxide drying. Among them, using the chitosan polymer long chain as a growth template and the aldehyde - based resin as a cross - linker, a polymer gel skeleton is cross - linked to encapsulate the in - situ formed silica aerogel, thereby forming a macropore - mesopore hierarchical structure at the nanoscale; by impregnating and adsorbing the sol mixture into a commercial sponge carrier, the encapsulation of the polymer network is realized, solving the problem that traditional aerogel materials are prone to powdering and fragmentation under stress, and obtaining a multi - hierarchical network aerogel material with adiabatic characteristics, excellent mechanical strength and self - extinguishing characteristics that can be prepared on a large scale.

The invention discloses N-alkylated / sulfonated benzimidazole polyaryletherketone / polyaryletherketone sulfone with controllable grafting density as well as a preparation method and application of the N-alkylated / sulfonated benzimidazole polyaryletherketone / polyaryletherketone sulfone. The preparation method comprises the following steps: firstly, introducing a protecting group on a phenolic hydroxyl group of a bisphenol monomer containing a benzimidazole structure, then carrying out nucleophilic substitution reaction on alkyl halide / alkyl halide sulfonic acid and-NH, and then removing the protecting group to obtain an N-alkylated / sulfonated benzimidazole functionalized bisphenol monomer; copolymerizing the monomer, a bisphenol monomer and a difluoro monomer to obtain a polymer; alkyl or alkyl sulfonic acid is introduced to a benzimidazole ring, so that-NH bonds are passivated, a steric hindrance effect is formed, and gelation of the polymer under a high polymerization degree is avoided; by adjusting the molar ratio of the monomers, the retention stability of the functional groups can be effectively controlled, and compared with the traditional grafting on the polymer, the non-regulation of functionalization and the gelation of the polymer are effectively avoided.

The present invention refers to a method for producing a polymer in form of a gel or a particle, and to the resulting polymer, gel and particle, respectively. The polymer comprises a carbon donor and a metal oxide precursor, a metal oxide or a combination thereof and optionally an active agent. The invention is further directed to a composition and film comprising such polymer, and their use as a medicament for example in treating diabetes, obesity, neuronal disease, viral infection or cancer.

The invention relates to Al2O3 / C powder as well as a preparation method and application thereof, and belongs to the field of ceramic powder preparation. The invention relates to a preparation method of Al2O3 / C powder, which comprises the following steps: by taking aluminum acetate as a raw material, acrylamide as an organic monomer, N, N '-methylenebisacrylamide as a cross-linking agent and ammonium persulfate as an initiator, forming polymer gel with a three-dimensional network structure through a sol-gel method, and drying to obtain dry gel powder; and pyrolyzing the dry gel powder in nitrogen to obtain Al2O3 / C powder with a porous structure characteristic. According to the invention, acrylamide is utilized to form gel with a three-dimensional network structure, Al < 3 + > is trapped in pores of the gel structure, so that an aluminum source and a carbon source are uniformly distributed on a molecular level, and growth of Al2O3 particles is effectively inhibited by utilizing an isolation effect of C and combining a rapid heating process, so that the diffusion distance of a substance for forming AlN is greatly shortened, and the preparation process is simplified. According to the method, rapid formation of AlN is promoted, the reaction time is effectively shortened, the efficiency is improved, and the obtained pure-phase AlN powder is small in particle size.

A solid electrolyte composition comprising the following components: (i) an organic polymer comprising a polymeric backbone and pendant groups, wherein at least a portion of the pendant groups contain an anionic group associated with a first metal ion; (ii) a solvent homogeneously incorporated in the polymer to result in a polymer gel system; and (iii) a metal salt dissolved in the solvent in a molar concentration of 0.05 M to 1.5 M and containing a second metal ion associated with an anion, provided that the first and second metal ions are the same. Also described herein are solid-state batteries comprising: a) an anode; (b) a cathode; and (c) the solid electrolyte composition described above.

The present application relates to the technical field of hydrogel, in particular to an injectable temperature-responsive enhanced composite double-network magnetic particle gel, a preparation method and application thereof, the hydrogel is composed of a particle gel network formed by gelatin nanoparticles and Fe3O4 nanoparticles through electrostatic interaction and a poly-N-isopropyl acrylamide (PNIPAM) based temperature-sensitive polymer gel network. At room temperature, the hydrogel has excellent shear thinning and self-healing properties, and can be easily injected through a needle and a microcatheter. When the temperature rises to human body temperature (37 DEG C), the temperature-sensitive polymer phase transition crosslinking enhances the mechanical properties of the gel network. The hydrogel is injectable in vitro, temperature-responsive in vivo, meets the requirements of vascular interventional embolization materials, and can be magnetically heated under an alternating magnetic field, and is used for liver cancer embolization combined with magnetic heating treatment. The preparation method is simple, has high biocompatibility, and has great clinical application potential.

This invention relates to a method for producing organometallic coordination polymers and materials obtained using the provided method. The organometallic coordination polymer synthesized according to this method has a gel structure, characterized by an effective diameter of 0.75-0.80 nm and a specific area of ​​1300-1700 m². 2 / g, micropore volume of 0.5-0.6cm³ 3 The method yields nanopores per g and improved thermal stability. The synthesis method allows for reduced material consumption during the process by using a single solvent in both the synthesis and activation stages, thus shortening the production time of the polymer gel, which is characterized by active mesopores and micropores. This makes it suitable as a matrix in various absorption processes, including natural gas storage systems.

The supported catalyst for preparing carbon nanotubes according to the present invention comprises: a sheet-like support; and a plurality of metal catalyst particles attached to a surface of the sheet-like support and including cobalt and vanadium. The method for preparing carbon nanotubes according to the present invention comprises the steps of: preparing a mixture comprising a metal precursor and a polymer gel; calcining the mixture to prepare a flaky carrier; attaching a plurality of metal catalyst particles including cobalt and vanadium on a surface of the sheet-like support to prepare a supported catalyst; and contacting the supported catalyst with a carbon source to produce carbon nanotubes. The carbon nanotubes according to the present invention have an average straightness of 0.8 or more.

The present application relates to a kind of porous gel electrolyte membrane based on polyvinylidene fluoride and its preparation method, belong to polymer gel electrolyte field.The porous gel electrolyte membrane includes gel electrolyte matrix, inorganic ceramic nano filler, lithium salt electrolyte and lithium salt auxiliary agent.Using phase inversion solidification method, the uniform porous structure is obtained, the adsorption and storage capacity of porous gel electrolyte membrane to electrolyte are improved;Using inorganic ceramic nano filler with high ionic conductance, the ionic conductance and mechanical strength of porous gel electrolyte membrane are enhanced;Using lithium salt added during preparation, the dehydrofluorination reaction of PVdF is inhibited, the stability of slurry is ensured, and by inducing the transition of PVdF matrix from alpha phase to beta phase, the uniform deposition of Li ion is promoted, so as to improve the cycle stability of battery.The preparation method of the present application is simple, easy to control, green and environmentally friendly, can significantly improve the ion transport kinetics and electrochemical stability of lithium ion battery.