37 results about "Polyacrylamide Hydrogel" patented technology

The invention discloses a high-heat-power thermoelectric cell hydrogel for low-grade heat energy collection and a preparation method thereof, and belongs to the technical field of heat energy recovery. The polyacrylamide hydrogel is selected as a substrate of the thermoelectric cell hydrogel, so that a hydrogel internal structure which is easy to regulate and control can be obtained; excellent hydrogel stretchability is obtained by using a cross-linking agent and an initiator with relatively low concentration; potassium ferricyanide and potassium ferrocyanide are used as redox ions to generate a thermoelectric effect, so that stable P-type thermal power is obtained; by using guanidine hydrochloride, the solvation entropy difference between potassium ferricyanide and potassium ferrocyanide is enlarged, and the thermal power of the hydrogel in the thermoelectric cell is greatly improved; sodium pyrrolidone carboxylate is used, so that the concentration of ions in the hydrogel is further improved, the conductivity of the thermoelectric cell hydrogel is improved, meanwhile, a hydrogen bond network between water molecules is destroyed, and the water-retaining property of the thermoelectric cell hydrogel is improved.

The invention discloses an alkali-activated fly ash rapid gel hole sealing material as well as a preparation method and application thereof, and belongs to the technical field of preparation of flexible hole sealing materials for gas drilling. The invention provides an alkali-activated fly ash rapid gel hole sealing material which is prepared by the following steps: mixing a polyacrylamide hydrogel precursor solution prepared from an acrylamide monomer and a cross-linking agent with fly ash, adding an alkali accelerator and a thermal initiator, and standing. The preparation method comprises the following steps: mixing an acrylamide monomer, deionized water and a cross-linking agent to obtain a polyacrylamide hydrogel precursor solution, and mixing the polyacrylamide hydrogel precursor solution with fly ash to obtain a mixed solution; mixing sodium hydroxide and deionized water to obtain an alkali accelerant; and mixing with the mixed solution, adding a thermal initiator, standing and curing to obtain the rapid gel hole sealing material. The rapid gel hole sealing material prepared by the invention can be rapidly gelated in a short time, and can well permeate into cracks for filling; after gelling, certain obdurability is achieved, deformation is achieved along with the change of the stress effect, and long-term and efficient sealing performance is achieved.

The invention belongs to the technical field of polyacrylamide hydrogel, and discloses rapid temperature-sensitive response polyacrylamide composite hydrogel as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving N-isopropylacrylamide NIPAM, acrylic acid AA, [2-(methylacryloyloxy)-ethyl] dimethyl-(3-sulfopropyl) SBMA, an initiator and a chemical cross-linking agent in an amphiphilic cellulose acetate WSCA solution, mixing and stirring until a uniform and transparent hydrogel precursor solution is formed, and carrying out cross-linking polymerization on the obtained hydrogel precursor solution to obtain the hydrogel. Finally, the polyacrylamide composite hydrogel with rapid temperature-sensitive response is generated, and the polyacrylamide composite hydrogel is marked as the WSCA-PNSA composite temperature-sensitive hydrogel. The composite thermosensitive hydrogel provided by the invention has a phospholipid-like characteristic, so that the PNIPAM hydrogel has high thermosensitive driving force while realizing rapid thermal shrinkage, skin functional recovery can be promoted, and rapid and scar-free wound healing is realized.

The application provides a lateral flow chromatography test paper and application thereof. The lateral flow chromatography test paper comprises a quality control line and an absorption pad. The lateral flow chromatography test paper further comprises an intercept line arranged between the quality control line and the absorption pad, and the material of the intercept line is one or a mixture of two or more of gelatin, carrageenan, polyacrylamide hydrogel, polyacrylic acid hydrogel, polyvinyl alcohol hydrogel or polyvinyl alcohol-sodium alginate hydrogel solution. The lateral flow chromatography test paper can improve the sensitivity of commercial test paper strips, and can be applied to new crown antigen detection, human chorionic gonadotropin detection (HCG) and cardiac troponin detection. The lateral flow chromatography test paper provided by the application can significantly improve the sensitivity by adding a cheap hydrogel intercept line after the quality control line, has good universality, and can be widely applied to various colloidal gold method test paper detection and immunofluorescence test paper detection.

The invention belongs to the technical field of functional three-dimensional composite material preparation, and particularly relates to ion-modified carrageenan-polyacrylamide composite hydrogel and a preparation method thereof.The preparation method comprises the following steps that S1, carrageenan, acrylamide and N, N-dimethylformamide are mixed and stirred to be uniform, and a mixture is obtained; the preparation method comprises the following steps: dispersing and dissolving carrageenan, polyacrylamide, N, N '-methylene bisacrylamide and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methyl propiophenone in deionized water, and heating and stirring until solids are completely dissolved to obtain a carrageenan-polyacrylamide hydrogel prepolymer solution, namely a CA-PAM hydrogel prepolymer solution; s2, transferring the CA-PAM hydrogel pre-polymerized liquid into a watch glass, and refrigerating the CA-PAM hydrogel pre-polymerized liquid in an environment of 4 DEG C until the CA-PAM hydrogel pre-polymerized liquid is solidified to obtain a condensate; s3, irradiating the cured product by using an ultraviolet lamp, so as to prepare carrageenan-polyacrylamide composite hydrogel; s4, the carrageenan-polyacrylamide composite hydrogel is soaked in chlorate solutions with different concentrations respectively, and the ion modified / carrageenan-polyacrylamide composite hydrogel material is prepared.

The application discloses a crosslinking agent for degradable hydrogel and a preparation method of degradable polyacrylamide hydrogel based on the crosslinking agent; the crosslinking agent for degradable hydrogel is composed of hydantoin epoxy resin, N, N-dimethyl benzylamine and acrylamide; the degradable polyacrylamide hydrogel prepared by using the crosslinking agent comprises acrylamide, 1.8-4.6 parts of water, potassium persulfate and the crosslinking agent; the crosslinking agent for degradable hydrogel can realize the preparation of the degradable hydrogel by chemical crosslinking method, and by adjusting the crosslinking agent, the degradable hydrogel prepared based on the crosslinking agent is applicable in the temperature environment range of normal temperature to 150 DEG C, the degradable hydrogel has selectivity to gel breaking liquid, and can realize gel breaking only by adding alkaline gel breaking liquid, and the gel breaking time is adjustable in the range of 90 min to 72 h; in addition, the crosslinking agent and the preparation method of the hydrogel are simple, the conditions are easy to control, and have good market application and promotion prospect.

The application discloses a dye-free naked-eye recognizable nucleic acid culture detection counting method, and belongs to the technical field of digital nucleic acid culture. The method comprises the following steps: (1) adding water gel monomers acrylamide and methylene bisacrylamide into a loop-mediated isothermal amplification reaction system of a to-be-detected sample, and initiating crosslinking to form a water gel system; (2) isothermal amplification reaction; (3) after the amplification is completed, a magnesium pyrophosphate precipitate point formed in the water gel system is recognized and counted, and the concentration of target nucleic acid molecules in the to-be-detected sample is calculated. The application combines polyacrylamide water gel and digital LAMP, utilizes the adsorption flocculation capacity of PAM to control the LAMP reaction by-product magnesium pyrophosphate precipitation in the vicinity of a nucleic acid amplification group, forms a white point which has a clear color difference with a background, and the position and size of the white point are basically consistent with those of the nucleic acid amplification group, and thus the dye-free naked-eye recognizable nucleic acid culture counting effect is realized.

The application discloses a PAM-AA-NHS-based multifunctional biomimetic polymer adhesive for wound repair and a preparation method thereof, and belongs to the field of biomaterial preparation and biomedical application. N-hydroxysuccinimide acrylate copolymerized polyacrylamide hydrogel is used as a substrate and as a main chain network, and functionalized materials tannic acid and phenolic hydroxyl chitosan containing o-diphenol groups are introduced, so that effective adhesion can be formed at a biological tissue interface, and cross-linking can be generated with the main chain network through hydrogen bond action to form a secondary network. In addition, aldehyde group-rich oxidized dextran side chains are introduced, which can form Schiff base cross-linking with the main chain network and amino groups in the biological tissue interface to form long-acting adhesion performance. The adhesive has good tissue adhesion, biocompatibility, antibacterial activity and wound healing promotion capacity, can replace sutures, has a positive effect on the formation of new tissues and tissue healing, and is expected to be applied in clinical treatment of wound surfaces.

The invention provides a capsaicin / sodium alginate-polyacrylamide hydrogel modified PDMS antifouling coating, a preparation method and application, and belongs to the technical field of marine antifouling materials, the capsaicin / sodium alginate-polyacrylamide hydrogel modified PDMS antifouling coating comprises hydrogel, natural antifouling agent capsaicin and polydimethylsiloxane, the synthesis process is divided into three steps, and the preparation method is simple. The preparation method comprises the following steps: 1, adding natural capsaicin into the synthesis process of acrylamide hydrogel, 2, mixing a sodium alginate solution with the natural capsaicin to form a precursor solution, and adding an initiator for polymerization, and 3, slowly adding polymerized and dried capsaicin-hydrogel powder into a defoamed PDMS prepolymer mixture; natural capsaicin effectively inhibits the growth of marine fouling organisms, hydrogel is used as a toughening reservoir to continuously release an environment-friendly antifouling agent, the low-surface-energy antifouling effect and synergistic gain are achieved through the polydimethylsiloxane layer, the composite material intervenes into the biological fouling process from multiple aspects, and the composite material jointly deals with the marine organism fouling process.

The invention relates to the technical field of batteries, in particular to a coating composition for improving leakage resistance, liquid absorption and discharge performance of a battery and application of the coating composition. The prepared coating composition comprises the following raw materials in percentage by mass: 10%-25% of a methacrylate-acrylamide block copolymer, 10%-15% of polyvinyl alcohol, 40%-53% of starch, 1%-5% of an inorganic-organic composite corrosion inhibitor, 0.5%-2% of a compound surfactant and the balance of water. The invention also provides a preparation method of the coating composition and an application of the coating composition in a zinc-manganese dry battery, and the coating composition is used for preparing coated paper so as to improve the leakage resistance, liquid absorption and discharge performance of the battery. According to the invention, the methacrylate monomer is introduced into the traditional polyacrylamide hydrogel polymerization process, so that the liquid absorption amount and the liquid absorption rate are remarkably improved, the leakage resistance of the battery is improved, the liquid absorption amount is doubled, the discharge time is prolonged by 10%, and the retention rate reaches 95% or more after the battery is naturally stored for half a year.

The application discloses a programmable deformation and oxygen production magnetic driving soft robot and a preparation method thereof, and belongs to the technical field of composite materials and photocatalysis. Hard magnetic particles (T-NdFeB) with surface modification are compounded into kappa-carrageenan / polyacrylamide (KC / PAm) hydrogel through a free radical polymerization process to obtain a magnetic driving module. The modules are flexibly assembled into a soft robot with complex geometric shape and magnetization distribution by using a self-healing process between the modules, so that the soft robot can realize various programmable deformations. In addition, a Ru-Bi2CrO6 photocatalyst is obtained by doping Ru elements in Bi2CrO6, and is compounded into the KC / PAm hydrogel to construct a functional module capable of producing oxygen. The magnetic driving module and the functional module are further assembled into a magnetic oxygen production soft robot, so that the purpose of stably and flexibly supplying oxygen to a water environment is achieved.

A polyacrylamide-based aerogel may be an efficient solar vapor generation device. Internal pores of the polyacrylamide-based aerogel may provide capillary forces while elongated surface channels provide a transport force in response to the polyacrylamide-based aerogel contacting liquid. The polyacrylamide-based aerogel may be formed from a photocurable resin doped with reduced graphene oxide particles. The photocurable resin may be printed in layers in a micro continuous liquid interface projection process to form a polyacrylamide-based hydrogel. The polyacrylamide-based hydrogel may be immersed in water to form a swollen hydrogel structure. The swollen hydrogel structure may be frozen. The frozen hydrogel structure may be dried to form a polyacrylamide-based aerogel structure.

A preparation method of a nanofiber membrane with multiple response stimuli comprises the following steps: firstly dissolving MXene powder and PVDF in a DMF solution, then heating and stirring to obtain a uniform black mixed solution, and then spinning the black mixed solution through an electrostatic spinning process to prepare a PVDF-MXene nanofiber membrane; the preparation method comprises the following steps: dissolving an acrylamide monomer and an initiator in a silane cross-linking agent solution, stirring at normal temperature until the solution is in a semitransparent state to obtain a hydrogel solution, and introducing nitrogen into the hydrogel solution to obtain polyacrylamide hydrogel; the preparation method comprises the following steps: preparing polyacrylamide hydrogel into a PAM hydrogel nanofiber film through an electrostatic spinning process, and compounding a PVDF-MXene nanofiber film with the PAM hydrogel nanofiber film to obtain the Janus nanofiber film with a double-layer structure. The material can respond to multiple stimuli, and the stability is good through chemical bond connection.

The application provides a kind of molecular self-assembly triplet-triplet annihilation (TTA) photonic upconversion hydrogel and its preparation method and application, select polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) F127 three-block polymer to encapsulate upconversion dye pair, form nanomicelles.Utilize three-block polymer hydrophilic section PEO and hydrophobic section PPO in aqueous solution self-assembly to form nanoparticles, hydrophilic end is exposed outside, form dense oxygen barrier shell, hydrophobic end and hydrophobic luminescent material in core, avoid being quenched by oxygen in air.Again, add aqueous solution containing upconversion nanoparticles into acrylamide aqueous solution, directly polymerize, obtain upconversion hydrogel.The strategy is not only simple operation, without complex modification to luminescent material, and does not contain volatile organic solvent, and polyacrylamide hydrogel also has good biocompatibility, so it has great application prospect in biological field.

The application discloses a method for in-situ preparation of polyacrylamide hydrogel electrolyte at room temperature. The method directly utilizes the inherent reducibility of anode metal zinc, guides ammonium persulfate in a gel precursor solution placed between two zinc sheets or zinc sheets and positive electrode sheets to generate free radicals, so as to initiate a polymerization reaction. Compared with a conventional thermal polymerization and photopolymerization method for preparing hydrogel, the method can be completed in a short time at room temperature, and the prepared hydrogel electrolyte has good combination capacity with electrodes, and the stability of a battery is significantly improved.

The application relates to a directional radiation regulated high-thermal-resistance energy-saving wall body and a management and control method and a preparation method thereof, solves the technical problems that the prior art lacks cross-season adaptation capability, is effective in a single season but unbalanced in cross seasons, and cannot meet the winter and summer thermal working requirements in cooperation, and the wall body comprises a three-layer composite structure: an outer layer of a white cement matrix with low iron and manganese content, which can realize high reflection of a sunlight spectrum and high emission of an atmospheric window band; a middle layer of composite white cement, polyacrylamide hydrogel, hollow glass microbeads and phase change material microcapsules, the hydrogel forms a three-dimensional network to fix and disperse components, the glass microbeads construct multistage pores to strengthen thermal resistance, and the phase change microcapsules store and release heat to stabilize temperature difference; and an inner layer of an electrostatic spraying metal powder layer, which has low infrared band emissivity and realizes directional radiation regulation. The application has the following effects: realizing cross-season precise adaptation of winter heat preservation and summer heat insulation, breaking through the limitation of "single-season effectiveness", greatly reducing building energy consumption, and significantly improving indoor thermal comfort stability.

The application discloses a preparation method of a hydrogel immobilized composite enzyme, and a product and application thereof. Due to the protection of bacterial cell walls, the removal efficiency of resistant genes in traditional processes is low. The application utilizes polyacrylamide hydrogel to jointly immobilize laccase, hydrolase and nuclease, so that the enzymes are effectively coated inside the carrier, the problems of easy loss and easy reduction of activity of free enzymes are avoided, and the reusability is good, and no secondary pollution is generated. The laccase is used to reduce the concentration of sulfadiazine, the hydrolase is used to hydrolyze the bacterial cell walls to release intracellular ARG, and the nuclease is used to degrade the released intracellular ARG, so that the purpose of quickly eliminating ARG in water is achieved. The method has high removal efficiency on ARG and sulfadiazine, is simple, efficient and safe, is suitable for remediation treatment of aquaculture wastewater containing antibiotic and ARG pollution, and solves the problems of poor environmental stability of water-soluble enzymes and difficult recycling.

The invention belongs to the technical field of biomedical materials, and particularly relates to a COFs (covalent organic frameworks)-based conductive hydrogel material and application of the COFs-based conductive hydrogel material in electric-assisted promotion of healing of diabetic wounds. The preparation method comprises the following steps: forming a covalent organic framework, enabling the covalent organic framework to grow on reduced graphene oxide in situ to form a nano material with a highly-ordered porous crystal structure, loading the nano material to form polyacrylamide hydrogel, and preparing the flexible hydrogel material into the multifunctional patch through a flexible electrode system. Through a triple synergistic mechanism of photo-thermal sterilization, electrochemical ROS cleaning and cell / immune regulation, the microenvironment obstacle of diabetes wound healing is broken through, ordered collagenous fiber deposition and angiogenesis are promoted, and tissue mechanical strength and blood supply reconstruction are improved. Scar formation is reduced, and the skin barrier function integrity is recovered. And through the flexible wearable characteristic, the problems of portability and comfort pain points of clinical treatment are solved, and intelligent wireless control provides technical support for precise medical treatment.

The application discloses a kind of high elastic toughness antibacterial nanocomposite conductive hydrogel material and its preparation method and biomimetic sensing application, belong to the field of functional polymer materials.The application uses melamine foam as porous elastic skeleton, is modified in situ on foam skeleton growth polypyrrole nanoparticles, subsequently polymerizes polydopamine-polyacrylamide hydrogel network in its inside, obtains the multifunctional nanocomposite conductive hydrogel with stable interpenetrating structure.The composite conductive hydrogel of the application has the synergistic effect formed by electronic conduction and ionic conduction, not only has excellent conductivity (up to 12 mS·cm ‑1 ), but also has high elastic toughness and reversible compression performance, has excellent pressure sensing performance under low pressure (0.3 kPa), so as to realize efficient information transmission and encryption application as a pressure sensor.

This invention provides a capsaicin / sodium alginate-polyacrylamide hydrogel-modified PDMS antifouling coating, its preparation method, and its application, belonging to the field of marine antifouling materials technology. It comprises three components: hydrogel, the natural antifouling agent capsaicin, and polydimethylsiloxane. The synthesis process consists of three steps: first, adding natural capsaicin to the acrylamide hydrogel synthesis process; second, mixing sodium alginate solution with capsaicin to form a precursor solution, which is then added to an initiator for polymerization; and third, slowly adding the polymerized and dried capsaicin-hydrogel powder to a degassed PDMS prepolymer mixture. This invention effectively inhibits the growth of marine fouling organisms with natural capsaicin, utilizes the hydrogel as a toughening reservoir to continuously release an environmentally friendly antifouling agent, and achieves low surface energy antifouling through the polydimethylsiloxane layer, resulting in synergistic benefits. By intervening in the biofouling process from multiple angles, the composite material jointly addresses marine biofouling.

A method of preparing a hydrogel array comprising a multi-well plate includes preparing a polyacrylamide (PA) hydrogel with alternating stiffnesses. Preparing the PA hydrogel includes preparing a polymer solution, plasma treating the multi-well plate, attaching a patterned mask to a plate containing the polymer solution, the plate comprising a plurality of wells, and treating the polymer solution with UV light to form the PA hydrogel, the PA hydrogel having first regions with a first stiffness and second regions with a second stiffness, the first stiffness being greater than the second stiffness.

The invention discloses an artificial pancreas and a preparation method and application thereof, and belongs to the technical field of biomedical engineering and biological materials. The preparation method of the device comprises the following steps: preparing a cavity by taking a cellulose acetate microporous film as a shell, reserving a filling opening, mixing a sodium alginate or polyacrylamide hydrogel precursor solution with exogenous living cells with a glucose responsive insulin secretion function, filling the mixed solution into the cavity, sealing the filling opening, and sealing the filling opening. The whole device is soaked in a calcium chloride solution for crosslinking, or after exogenous living cells with a glucose-responsive insulin secretion function are encapsulated by calcium alginate hydrogel or polyacrylamide hydrogel, a cellulose acetate microporous film is used as a shell for packaging, so that the artificial pancreas is formed. The preparation method has a wide application prospect in the field of preparation of implantable artificial pancreas devices for treating diabetes cells.

The invention relates to a hydrogel electrolyte and a preparation method and application thereof, and belongs to the technical field of aqueous zinc ion batteries. The technical problem to be solved by the invention is to provide the preparation method of the hydrogel electrolyte. The method comprises the steps of zinc concentrate roasting, leaching, repeated leaching, mixed concentration, crosslinking and the like, and the polyacrylamide hydrogel electrolyte is prepared by directly adopting a leaching solution obtained after zinc concentrate leaching as a raw material through one-pot in-situ polymerization. The prepared hydrogel electrolyte shows excellent mechanical strength and toughness. A battery based on the electrolyte shows ultra-long cycle life, excellent interface stability and high coulombic efficiency, and the performance of the battery is obviously superior to that of a traditional system. The process disclosed by the invention can be used for directly treating the leachate containing the undissolved mineral substances, and is low in requirement on the purity of the raw materials and higher in applicability. A brand new process route for directly preparing a battery key material from zinc ore resources is created, an innovative thought is provided for high-value utilization of mineral resources, and important strategic significance is achieved.

The invention discloses a fluorescent microneedle sensor based on DNA-silver nanocluster hydrogel as well as a preparation method and application of the fluorescent microneedle sensor. According to the sensor, polyacrylamide hydrogel is used as a flexible matrix, and DNA-silver nanoclusters are uniformly embedded into the flexible matrix to serve as a fluorescent indicator. The preparation method comprises the following steps: mixing an acrylamide monomer, a cross-linking agent, a DNA-silver nano-cluster solution, an initiator and a catalyst, and carrying out polymerization and one-step molding in a microneedle mold under the initiation of ultraviolet light. The prepared sensor has the advantages of excellent flexibility, high stretch rate, surface adhesion and stable fluorescence property. When the fluorescent probe is used for detecting thiram, the low detection limit of 0.199 mu M and good linear response can be realized based on the specific fluorescence quenching effect of the fluorescent probe. The sensor can be used for on-site rapid screening of pesticide residues on the surfaces of foods such as fruits and seafood without complex instruments, and has a wide application prospect in the fields of food safety and environmental monitoring.

The invention discloses a self-water-replenishing polyacrylamide-based hydrogel cooler as well as a preparation method and application thereof, and belongs to the technical field of coolers. The preparation method comprises the following steps: preparing a polyacrylamide precursor solution, adding nano silicon dioxide and nano titanium dioxide by taking part of the polyacrylamide precursor solution as a solvent, and then carrying out ultrasonic dispersion to prepare a solution A; absorbing the rest part of the polyacrylamide precursor solution by the melamine sponge to prepare an intermediate state sponge; placing the solution A and the intermediate-state sponge in a mold in sequence, heating under a water bath condition, and soaking in deionized water to prepare polyacrylamide hydrogel; sequentially carrying out cold storage standing and freeze drying on the polyacrylamide hydrogel to prepare a hydrogel preform; and placing the hydrogel preform in a lithium chloride solution, and standing to obtain the polyacrylamide-based hydrogel cooler. The technical problems that single radiation refrigeration excessively depends on environmental conditions, and common evaporative cooling is low in energy efficiency are solved.

The application discloses a kind of high elastic toughness antibacterial nanocomposite conductive hydrogel material and its preparation method and biomimetic sensing application, belong to the field of functional polymer materials.The application uses melamine foam as porous elastic skeleton, is modified in situ on foam skeleton growth polypyrrole nanoparticles, subsequently polymerizes polydopamine-polyacrylamide hydrogel network in its inside, obtains the multifunctional nanocomposite conductive hydrogel with stable interpenetrating structure.The composite conductive hydrogel of the application has the synergistic effect formed by electronic conduction and ionic conduction, not only has excellent conductivity (up to 12 mS·cm ‑1 ), but also has high elastic toughness and reversible compression performance, has excellent pressure sensing performance under low pressure (0.3 kPa), so as to realize efficient information transmission and encryption application as a pressure sensor.

The invention discloses a hydrogel-based composite film integrating efficient phase change cooling, high thermal conductivity, electromagnetic shielding and leakage prevention and a preparation method of the hydrogel-based composite film. The thin film is of a double-layer composite structure, wherein the lower layer is a high-thermal-conductivity electromagnetic shielding layer composed of polyacrylamide (PAM) hydrogel, Si3N4 and electromagnetic shielding filler, and the upper layer is a phase-change leakage-proof layer composed of PAM hydrogel and polyethylene glycol (PEG); the upper layer and the lower layer form a stable integrated structure through the synergistic effect of interface hydrogen bonds and physical entanglement, and finally integration of thermal management and electromagnetic protection functions is achieved. The phase change latent heat of the prepared film is larger than or equal to 120 J / g, the X-band electromagnetic shielding effectiveness (SE) is larger than or equal to 32 dB, and leakage is avoided at the high temperature of 80 DEG C. The preparation process is simple, and the product can be applied to various scenes such as power chips, LED equipment and wearable electronic devices.

The invention discloses a tunnel nanotube mediated intercellular mechanical signal transduction regulation and control mechanism research method and system and application, and relates to the technical field of biology. The regulation and control mechanism research method of tunnel nanotube mediated intercellular mechanical signal transduction comprises the following steps: S1, providing tunnel nanotube connection cells growing on a polyacrylamide hydrogel substrate; s2, performing drug treatment on the tunnel nanotube connected cells: applying an effective dose of at least one signal path inhibitor into a system in which the tunnel nanotube connected cells are cultured; s3, mechanical stimulation of tunnel nanotube connection cells; s4, measuring the change of the traction force of the cells and the change of the spreading area of the cells; by adopting the research method provided by the invention, the important influence of intercellular electric signal conduction on the cell connection function of the tunnel nanotube is revealed, and a precise tool is provided for researching intercellular mechanical communication.

The present application belongs to the technical field of battery dressing, and particularly relates to a wearable magnesium battery self-powered dressing for chronic wound healing and a preparation method and application thereof. A flexible conductive carbon cloth coated with a viologen-based covalent organic framework material is used as a positive electrode of a battery, a magnesium sheet is used as a negative electrode, and a polyacrylamide hydrogel is used as a solid-state electrolyte, so that a flexible wearable self-powered dressing is assembled. The formed electrode can effectively input electric stimulation to a wound surface, the dressing can simulate an endogenous electric field in the wound, induce migration of fibroblasts, regulate a wound immune microenvironment, inhibit an inflammatory response, and the polyacrylamide gel electrolyte has good hygroscopicity, can absorb exudate at the wound surface, maintain a moist healing environment, and effectively promote chronic wound healing of rats. The self-powered dressing prepared by the present application provides a reliable electrotherapy method for chronic wound healing.

This invention relates to a composite hydrogel suspension carrier for the deep treatment of recalcitrant organic industrial wastewater and its preparation method, belonging to the field of polymer composite materials and wastewater treatment. The composite hydrogel suspension carrier of this invention is obtained by immobilizing activated carbon and manganese trioxide in a polyacrylamide hydrogel, followed by foaming with sodium bicarbonate and potential modification with polyquaternary ammonium salt-10. The composite hydrogel suspension carrier of this invention exhibits strong oxidation resistance through the synergistic effect of adsorption and catalytic ozone oxidation, while the use of pore-forming agents and potential modifiers enables rapid enrichment of microorganisms. This provides a specialized carrier with strong oxidation resistance, long-term stability, high degradation efficiency, and economical preparation for the efficient treatment of recalcitrant organic industrial wastewater using a near-field coupling process of catalytic ozone oxidation-biodegradation.