98 results about "Polyvinyl alcohol hydrogel" patented technology

The invention provides a carbon nanotube / polyvinyl alcohol hydrogel and a preparation method and application thereof, and belongs to the technical field of composite materials and flexible electron cross materials. Cellulose nanofibers and multi-walled carbon nanotubes are dispersed in deionized water to obtain dispersion liquid; uniformly mixing a polyvinyl alcohol solution and the dispersion liquid to obtain a mixed solution; carrying out oriented freezing forming on the mixed solution, and then freeze-drying the mixed solution to obtain an aerogel sample; performing hot pressing on the aerogel sample to obtain a thin film material; and swelling and balancing the film material in deionized water to obtain the carbon nanotube / polyvinyl alcohol hydrogel. According to the invention, collaborative optimization of conductive network continuity, interface bonding strength and energy dissipation capability is realized, so that high conductivity, high stress and obdurability are considered, and the material is endowed with multi-dimensional strain sensing capability and signal stability; and a new idea is provided for realizing effective balance between high conductivity and excellent mechanical properties of the hydrogel material.

Provided in the present invention are a polyvinyl alcohol powder and hydrogel, and a preparation method therefor and the use thereof. The method mainly comprises: preparing a polyvinyl alcohol powder from polyvinyl alcohol, then mixing same with water and swirling same to make the powder swell into discrete microgel particles, and applying pressure to make polyvinyl alcohol molecular chains at the interface of the microgel diffuse, entangle and link with each other and crystallize and fuse, so as to prepare a polyvinyl alcohol hydrogel. With regard to the polyvinyl alcohol powder, the preparation method therefor comprises direct pulverization, or physical crosslinking prior to pulverization, or casting into a film prior to pulverization, etc.; and preferably, the powder is prepared by first performing casting into a film and then pulverizing same, which can make the powder more uniform in terms of crystallinity and more stable in terms of performance. With regard to the swelling process of the polyvinyl alcohol powder, it is necessary to strictly control the ratio of the powder to water, the temperature and the time to ensure that before swelling is complete, transferral into a mold is conducted and pressure is applied to form a hydrogel. Products meeting different performance requirements, including prostheses for the soft tissues of various locomotor systems, medical and esthetic filling materials, etc., are prepared by adjusting process parameters; and the polyvinyl alcohol powder can also be used for preparing PVA plastics having a three-dimensional structure, and thus has broad application prospects.

The invention provides a polyvinyl alcohol hydrogel patch with a double-disc structure as well as a preparation method and application of the polyvinyl alcohol hydrogel patch. The preparation method comprises the following steps: S1, preparing a PVA solution; s2, the PVA solution in the step S1 is poured into a mold of a double-disc structure, and t-PVA is obtained through a freezing pouring method; s3, the t-PVA in the step S2 is subjected to salting-out treatment, and a reinforced hydrogel patch a is obtained; s4, performing solvent exchange assisted wet annealing on the reinforced hydrogel patch a in the step S3 to obtain a reinforced hydrogel patch b; and S5, carrying out swelling equilibrium treatment on the reinforced hydrogel patch b in the step S4 to obtain e-PVA. According to the preparation method provided by the invention, the crystallinity and molecular entanglement degree of the hydrogel patch are remarkably improved, so that the hydrogel patch has a compact porous structure, tough mechanical firmness, excellent elasticity and excellent water locking property. The polyvinyl alcohol hydrogel patch obtained by the preparation method provided by the invention has good biocompatibility and a full-layer repair effect.

The invention discloses transparent biomass polyvinyl alcohol hydrogel as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing biomass polyvinyl alcohol with water to obtain a polyvinyl alcohol aqueous solution, and performing freeze-thaw cycle to obtain the transparent biomass polyvinyl alcohol hydrogel; the number of freezing and thawing cycles is 1-3, the freezing and thawing time for each time is 2-8 hours, and when the PVA used in each milliliter of water is 150 mg, freezing and thawing are performed once, the freezing and thawing time is 2-8 hours, or freezing and thawing are performed three times, and the freezing and thawing time is 2 hours; when the amount of PVA used in each milliliter of water is 100 mg, freezing and thawing are carried out once, and the freezing and thawing time is 2-8 hours, or freezing and thawing are carried out three times, and the freezing and thawing time is 2-4 hours each time; when the PVA used in each milliliter of water is 50mg, freezing and thawing are carried out once, and the freezing and thawing time is 4-8 hours, or freezing and thawing are carried out three times, and the freezing and thawing time is 2-8 hours each time. The hydrogel disclosed by the invention is high in transparency, and the wound healing condition is convenient to observe.

The invention relates to the technical field of hydrogel, in particular to oriented degummed silk fiber reinforced polyvinyl alcohol hydrogel as well as a preparation method and application thereof.The hydrogel comprises degummed silk fiber and polyvinyl alcohol, has an anisotropic structure and can effectively enhance the fracture toughness and crack propagation resistance of the hydrogel. Through the assembly of the bionic fibrous ring structure, the multi-scale architecture of the natural intervertebral disc fibrous ring is simulated, the native fibrous ring structure is copied, and the mechanical microenvironment of the fibrous ring is simulated. The hydrogel and the artificial intervertebral disc have high toughness, long-term stability and biocompatibility, are particularly suitable for intervertebral disc repair, can stably bear biological load for a long time in intervertebral disc repair, and have relatively high application value.

The invention discloses a preparation method of a PVA / chitin porous nanosheet layered film for salinity gradient power generation, and belongs to the technical field of bio-based material functionalization. The preparation method comprises the following operation steps: firstly, preparing a chitin porous nanosheet by utilizing an acid steam combined ultrasonic strategy; modifying the surface of the chitin porous nanosheet with rich positive charges through quaternization reaction, and performing suction filtration and drying to obtain a porous nanosheet layered film; and finally, circularly freezing, thawing and packaging the porous nanosheet layered film by using polyvinyl alcohol hydrogel to prepare the PVA / chitin porous nanosheet layered film. According to the PVA / chitin porous nanosheet layered film, by means of combination of chitin nanosheet layer gap channels and micro-nano pore channels in nanosheet surfaces, ion transmission paths are increased, ion transmission resistance is reduced, the microstructure of the layered film is effectively stabilized jointly by means of the interlayer weak force effect and the hydrogen bond bonding effect between polyvinyl alcohol molecules, and therefore the film has the advantages of being capable of being used for preparing the composite film. And the optimal salinity gradient power generation output power density reaches 7.33 W / m < 2 >.

The invention discloses a flexible hydrogel neural electrode and a preparation method and application thereof. The flexible hydrogel neural electrode comprises a flexible substrate layer, an electrode layer and a packaging layer which are sequentially arranged in a stacked mode, the flexible substrate layer and the packaging layer are each of a hydrogel fiber composite film structure formed by compounding a fiber film and hydrogel, and the fiber film is embedded in the hydrogel; the fiber film is a polycaprolactam fiber film, and the hydrogel is polyvinyl alcohol hydrogel; the electrode layer comprises a plurality of metal electrodes, and each metal electrode is provided with an electrode point and a bonding pad; the packaging layer is provided with a plurality of hole structures, and the holes are arranged corresponding to the electrode points and the bonding pads and enable the electrode points and the bonding pads to be exposed. The flexible hydrogel neural electrode provided by the invention has good biocompatibility, swelling resistance and process compatibility; meanwhile, the flexible hydrogel neural electrode can be stably applied to an implantable brain-computer interface and is used for realizing long-term stable acquisition and transmission of neural signals.

The present invention relates to a microneedle-based transdermal delivery patch fabricated from a hydrogel composed of polyvinyl alcohol (PVA), arginine-modified chitosan, and a crosslinker. The arginine-modified chitosan is prepared by reacting a chitosan solution with an arginine solution preactivated with N-hydroxy succinimide and 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide at a specific pH. The hydrogel's formulation further comprises a PVA concentration ranging from 10% to 12% (w / v). arginine-modified chitosan and PVA solution are mixed in a 1:2 ratio by volume and are crosslinked using trimethyl orthoformate (TMOF). The patch is further loaded with curcumin, with a concentration of 120μg per patch, demonstrating a 70% release over 48 hours in a controlled manner. This invention represents the first application of PVA crosslinked arginine-modified chitosan hydrogel loaded with curcumin specifically for animal wound healing, providing enhanced wound healing and antibacterial efficacy.

The invention discloses manganese-based Prussian blue-polyacrylic acid / polyvinyl alcohol hydrogel for preventing and treating allergic rhinitis. Monodisperse manganese-based Prussian blue nanoparticles synthesized by taking polyacrylic acid as a template are stably immobilized in a polyacrylic acid / polyvinyl alcohol hydrogel matrix. The obtained composite hydrogel membrane has the following prominent advantages: the composite hydrogel membrane has excellent hydrogel characteristics, including controllable membrane thickness, good tissue adhesion and air permeability; reliable biocompatibility and safety are shown; allergen permeation is effectively blocked through a physical barrier effect; prussian blue is continuously released in the slow-release degradation process, active oxygen free radicals are remarkably removed, and the powerful anti-inflammatory effect is achieved. Due to the synergistic effect of double mechanisms of protection and treatment, the material has important clinical application value and development potential in the fields of prevention and treatment of allergic rhinitis.

The invention discloses an acid-resistant nanofiltration membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The gradient heterojunction active layer is formed on the base film through sequential interfacial polymerization and comprises a polysulfonamide bottom layer adjacent to the base film and a polyamine-metal organic framework composite layer located on the polysulfonamide bottom layer; the gradient heterojunction active layer is coated with the pH response self-repairing layer, and the self-repairing layer comprises pH response type microcapsules dispersed in cross-linked polyvinyl alcohol hydrogel; the membrane has excellent self-repairing capability and maintenance convenience, the repairing efficiency of artificial microcosmic damage in an acid environment within 24 hours can reach 85% or above, tiny scratches and defects generated in the operation or installation process of the membrane can be automatically repaired, the failure of the whole membrane element caused by tiny damage expansion is avoided, and the service life of the membrane element is prolonged. And the unplanned shutdown risk and the special repair and maintenance cost are reduced.

The invention belongs to the technical field of hydrogel high polymer materials, and particularly relates to a preparation method of high-strength and high-conductivity nano hydrogel and the hydrogel prepared by the preparation method. The preparation method of the hydrogel provided by the invention comprises the following steps: firstly, dissolving polyvinyl alcohol in a good solvent dimethyl sulfoxide of polyvinyl alcohol, and keeping an extended conformation and a staggered network; then, a poor solvent ethyl acetate of polyvinyl alcohol is introduced for non-solvent quenching, so that in-situ phase separation is promoted, polymer chains are drawn close, and interaction between the chains is enhanced; finally, neutral solvent water of polyvinyl alcohol is introduced for solvent replacement, the polymer microphase is evolved into nanofibers, and the polyvinyl alcohol hydrogel with nanoscale pores is formed. The hydrogel prepared by the invention has relatively high fracture stress strain and ionic conductivity, and effectively solves the problems of easy fracture, poor conductivity and the like of the traditional ionic thermoelectric gel.

The invention belongs to the technical field of hydrogel, and discloses polyvinyl alcohol hydrogel and a preparation method thereof.The preparation method comprises the steps that polyvinyl alcohol, a biomass carbon quantum dot solution, a plasticizer and a first cross-linking agent are mixed, heated and dissolved to form a homogeneous solution; defoaming the homogeneous solution, injecting the solution into a mold, and performing freeze-thaw cycle treatment to form primary hydrogel; immersing the primary hydrogel into a solution containing a second cross-linking agent for secondary cross-linking to obtain composite polyvinyl alcohol hydrogel; wherein the biomass carbon quantum dot solution is prepared from a biomass raw material through a hydrothermal reaction. The self-healing and conductive hydrogel prepared by the method has the advantages of cheap and easily available raw materials, simple equipment operation, green and environment-friendly technological process, good product biocompatibility and the like, and is suitable for industrial production.

The invention discloses a performance-adjustable aramid nanofiber reinforced polyvinyl alcohol hydrogel and a preparation method thereof, and the preparation method comprises the following steps: S1, through a high-speed shearing sequential control method, realizing the conversion of aramid fibers from a micron level to a nano level; s2, dissolving and dispersing aramid fibers by using a mixed acid system to obtain an ANFs stock solution, dropwise adding deionized water into an ice bath, and centrifuging to obtain an ANFs aqueous dispersion system; s3, PVA, TA and ANFs are heated and stirred, and a uniform PVA / ANFs-TA mixed solution is obtained; the preparation method comprises the following steps: mixing a PVA solution with ANFs-TA, adding a borax solution into the mixed solution, heating, pouring into a mold to obtain PVA / ANFs-TA hydrogel, and adjusting the concentration of TA to obtain super-stretched hydrogel (TA 2%) and self-repairing hydrogel (TA 0.8%). The prepared self-repairing hydrogel solves the problems that a single hydrogel material is insufficient in mechanical strength and limited in self-repairing capacity; the super-stretching hydrogel can realize 50000% super-stretching rate and underwater long-term adhesion.

This invention discloses a polysaccharide-based highly permeable carbon dot hydrogel and its preparation method, belonging to the field of hydrogels. This invention introduces specific carbon dots (chitosan carbon dots) as nanofillers, which are then linked to a polyvinyl alcohol hydrogel network via hydrogen bonds, promoting effective cross-linking and polymerization. Simultaneously, a sand core filtration device is used to vacuum filter the hydrogel at 0.1 MPa for 24 hours, thereby constructing the porous structure of the hydrogel. This not only enhances the mechanical properties of the hydrogel but also significantly improves its electrical conductivity and permeability. Furthermore, the preparation process is simple and the performance is excellent.

The invention discloses an electrothermal response three-layer hydrogel actuator and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving N-isopropylacrylamide in deionized water, adding polyvinyl alcohol, magnesium lithium silicate, nano silicon dioxide, a cross-linking agent, ammonium persulfate and an initiator, and polymerizing to obtain a poly (N-isopropylacrylamide)-polyvinyl alcohol hydrogel layer; (2) performing hot pressing on the flexible flat cable, the silver nanowire layer and the two polyurethane films to obtain a silver nanowire flexible heater; and (3) rolling the polyimide film, the poly (N-isopropylacrylamide)-polyvinyl alcohol hydrogel layer and the silver nanowire flexible heater to obtain the three-layer hydrogel actuator. The method is simple and easy to operate, and the obtained hydrogel actuator is good in mechanical property, has good, rapid and stable responsiveness to temperature and current, enriches actuating conditions, can play a better role in the fields of underwater robots, holders, valve switches and the like, and is excellent in application prospect.

The invention discloses a transparent biomass polyvinyl alcohol hydrogel and its preparation method and application, preparation method includes mixing biomass polyvinyl alcohol with water to obtain polyvinyl alcohol aqueous solution, freeze-thaw cycle obtains transparent biomass polyvinyl alcohol hydrogel;Number of freeze-thaw cycles 1 3 times, each freezing and thawing time 2 8h, when PVA used for every milliliter of water is 150mg, freeze-thaw 1 time, freezing and thawing time is 2 8h, or freeze-thaw 3 times, each freezing and thawing time is 2h;When PVA used for every milliliter of water is 100mg, freeze-thaw 1 time, freezing and thawing time is 2 8h, or freeze-thaw 3 times, each freezing and thawing time is 2 4h;When PVA used for every milliliter of water is 50mg, freeze-thaw 1 time, freezing and thawing time is 4 8h, or freeze-thaw 3 times, each freezing and thawing time is 2 8h. The hydrogel transparency of the present invention is high, and it is convenient to observe wound healing.

The invention discloses a silver nanoparticle / polyvinyl alcohol hydrogel material, a preparation method thereof and application of the silver nanoparticle / polyvinyl alcohol hydrogel material in antibiotic detection. The silver nanoparticle / polyvinyl alcohol hydrogel material comprises monodisperse silver nanoparticles (AgNPs) and polyvinyl alcohol hydrogel, the monodisperse silver nanoparticles are embedded into the polyvinyl alcohol hydrogel, and an AgNPs / PVA composite substrate is formed through calcium ion induced aggregation and freeze thawing crosslinking. The silver nanoparticle / polyvinyl alcohol hydrogel material is used as a hydrogel SERS (Surface Enhanced Raman Scattering) chip for detecting residual veterinary drugs in animal-derived foods, shows good linear response to different antibiotics, has an adding standard recovery rate of 76-86%, is low in cost, and has extremely high sensitivity and relatively strong reproducibility, stability and uniformity.

The invention relates to the field of biomedical polymer materials, and discloses zinc-loaded eutectic gel as well as a preparation method and application thereof. The zinc-loaded eutectic gel comprises the following components: gelatin, polyvinyl alcohol and a deep eutectic solvent containing zinc ions. The preparation method comprises the following steps: dissolving gelatin and polyvinyl alcohol in water, and reacting to obtain gelatin-polyvinyl alcohol hydrogel; and placing the gelatin-polyvinyl alcohol hydrogel in a deep eutectic solvent containing zinc ions for replacement to obtain the zinc-loaded eutectic gel. The tensile strength and the fracture strain of the zinc-loaded eutectic gel can reach 258kPa and 632% at most, and meanwhile, the zinc-loaded eutectic gel has good low-temperature stability and still keeps a phase-change-free state in an environment of-80 DEG C. The zinc-loaded eutectic gel can effectively antagonize bacterial infection, inhibit inflammatory response, control moisture volatilization, promote angiogenesis and collagen generation and accelerate wound healing, and is suitable for the medical fields of infectious and non-infectious wound dressings, joint wound dressings and the like.

The present application relates to a kind of preparation method of cold-proof anti-freezing breathable polyvinyl alcohol hydrogel film, including the preparation of hydrogel precursor solution and the preparation steps of polyvinyl alcohol hydrogel film.The present application also provides the cold-proof anti-freezing breathable polyvinyl alcohol hydrogel film obtained by the preparation method and the application of the film in the field of medical and skin care instruments.The present application is the porous structure of polyvinyl alcohol film prepared by repeated freeze-thaw, ice template method in the ternary solvent system of polyethylene glycol / ethylene glycol / water, the pore size thereof can be controlled by the method of the present application, and the obtained film has good air permeability and biocompatibility, and can be used as covering film in low-temperature surgery, medical dressing, air-permeable protective mask and other scenes.

The invention discloses a carbon dot-based high-water-content tough hydrogel and a preparation method thereof, belonging to the technical field of hydrogels. The invention introduces specific carbon dots (hydroquinone carbon dots), utilizes the hydroquinone carbon dots as nanofillers, and connects them to the double cross-linked network of sodium alginate / polyvinyl alcohol hydrogel through hydrogen bonds to promote effective cross-linking polymerization. The introduction of the hydroquinone carbon dots can not only improve the conductivity, but also enhance the mechanical properties of the high-water-content hydrogel, and the preparation process is simple and the performance is excellent.

A flexible temperature sensor based on a double-layer hydrogel temperature-sensitive film, a preparation method thereof, and an application thereof in temperature sensing belong to the technical field of temperature sensing. The flexible temperature sensor has a planar layered structure and is composed of an upper electrode layer, a middle double-layer hydrogel temperature-sensitive film, and a lower electrode layer; wherein, the double-layer hydrogel temperature-sensitive film is composed of a polyvinyl alcohol hydrogel film and a sodium polystyrene sulfonate / polyvinyl alcohol hydrogel film, and the sensor can be obtained by laminating the upper electrode layer, the middle hydrogel temperature-sensitive film, and the lower electrode layer together. By changing the thickness of the hydrogel film and the ion concentration contained therein, the transport process of ions in the hydrogel film is regulated to achieve high-precision temperature sensing; the prepared sensor has high sensitivity, high resolution, and good cyclic stability, providing the possibility for high-precision monitoring of body temperature, and having good application prospects in the fields of human health monitoring and electronic skin.

The invention discloses a double-emission carbon dot hydrogel film as well as a preparation method and application thereof, and relates to the technical field of analysis detection and functional materials. The double-emission carbon dot hydrogel film takes polyvinyl alcohol hydrogel as a carrier, and double-emission carbon dots (O-CDs) synthesized by taking L-glutamic acid and o-phenylenediamine as precursors are uniformly dispersed in the polyvinyl alcohol hydrogel. The O-CDs have double emission peaks of 400 nm and 530 nm under the excitation of 375 nm. The dual-emission carbon dot hydrogel film is applied to portable visual detection of Cu < 2 + > and Ag < + >, and the portable visual detection is dual-mode measurement based on RGB and comprises fluorescence colorimetric measurement in a solution and visual detection of the film assisted by a smart phone. According to the dual-mode strategy, precise instruments are not needed, rapid, reliable and synchronous detection of Cu < 2 + > and Ag < + > can be achieved within 10 min, the limitation of traditional single-mode detection is broken through, and a stable platform is provided for on-site metal ion monitoring.

The invention relates to the technical field of hydrogel synthesis, in particular to an anti-swelling underwater pressure-resistant supramolecular polyvinyl alcohol hydrogel membrane material as well as a preparation method and application thereof. The compression strength of the polyvinyl alcohol hydrogel prepared by the method is 25-50 Mpa, the polyvinyl alcohol hydrogel has plasticity and relatively high mechanical strength, the volume of the gel is basically unchanged before and after swelling, and the swelling mass change rate is less than 3%; the product can be stably used in a solvent environment or seawater for a long time. The hydrogel prepared by the invention is low in toxicity, has controllable swelling resistance and compression resistance, and can be applied to key materials requiring long-term dimensional stability and mechanical reliability in environments such as a dynamic wet environment and a precise living body; such as a precise marine equipment antifouling substrate, a deep sea stable sealing member, a bearing area bone repair implant or a biological-marine cross interface device.

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 discloses a high-light-transmittance anti-melting hydrogel coating for an ice and snow structure and a preparation method thereof. The coating is based on an environment-degradable polyvinyl alcohol hydrogel system, a continuous protective layer is formed on the surface of an ice and snow matrix through physical-chemical double crosslinking, and the buffer and delay effects on interface moisture migration and energy exchange are achieved, so that sublimation and ablation of ice and snow are effectively slowed down under the environment conditions of temperature rise, wind erosion, heat radiation and the like. The hydrogel system has good wetting spreadability, transparency and film-forming uniformity, can be quickly constructed in a spraying manner, and has the characteristics of humidity regulation, moisture buffering and passive temperature regulation. Compared with the existing protection means depending on refrigeration or frequent manual maintenance, the invention provides a passive anti-melting scheme which is environment-friendly, low in energy consumption and suitable for protecting ice sculptures, snow sculptures and related ice and snow products.

The invention discloses a preparation method of a calcium carbonate-polyvinyl alcohol composite aerogel material, and belongs to the technical field of thermal insulation materials. The invention aims to solve the problems that the crystallization behavior of calcium carbonate is difficult to effectively regulate and control and the porous structure and the heat insulation function of aerogel are easily damaged in the prior art. The method comprises the following steps: reacting a mixed solution of calcium chloride and magnesium chloride with carbon dioxide to prepare micro-nano amorphous calcium carbonate and a small amount of nano calcite; co-doping the chitosan and aspartic acid into polyvinyl alcohol hydrogel, uniformly mixing, and carrying out directional freezing and freeze-drying treatment; finally, high-concentration carbon dioxide atmosphere treatment is adopted in a humid and hot environment, amorphous calcium carbonate is induced to be dissolved on the polyvinyl alcohol framework and recrystallized into calcite and vaterite shell layers, and therefore the composite aerogel material is obtained. While good heat insulation performance and flexibility are maintained, the mechanical strength and damp and heat resistance stability of the material are remarkably improved, efficient curing and utilization of carbon dioxide are achieved, and the material is suitable for the field of green energy-saving buildings.

The invention relates to a manufacturing method of a bionic blood vessel model and the bionic blood vessel model.The manufacturing method of the bionic blood vessel model comprises the steps that a three-dimensional computer model of a blood vessel lumen is constructed according to blood vessel image data; according to a three-dimensional computer model of a blood vessel lumen, a water-soluble polyvinyl alcohol material is adopted to manufacture a water-soluble inner core through a 3D printing technology; the water-soluble inner core is subjected to operation for N times or less, wherein N is larger than or equal to 1; the outer surface of the water-soluble inner core is evenly covered with a polyvinyl alcohol solution; the water-soluble inner core covered with the polyvinyl alcohol solution is subjected to at least one time of freeze thawing treatment, so that the polyvinyl alcohol solution is solidified into polyvinyl alcohol hydrogel; after N times of operation are completed, the water-soluble inner core covered with the polyvinyl alcohol hydrogel is soaked in ultrapure water so that the water-soluble inner core can be dissolved, and therefore the bionic blood vessel model with the good shape and mechanical property is obtained.

The application provides a hydrogel with controllable response lubricating performance, which is a mucin-polyvinyl alcohol hydrogel, a mucin-polyvinyl alcohol / sodium alginate hydrogel, a mucin-polyvinyl alcohol / carboxymethyl cellulose sodium hydrogel, a mucin-acrylamide hydrogel or a mucin-hydroxyethyl methacrylate hydrogel, and is obtained by preparing a mucin aqueous solution, a hydrogel precursor liquid and a forming treatment. The hydrogel with controllable response lubricating performance has a low friction coefficient and can be applied to the preparation of a soft robot.

The invention discloses an integrated zinc ion battery based on a curled nanofiber-based gel electrolyte. The integrated zinc ion battery is structurally characterized by being composed of a curled nanofiber-based gel electrolyte layer, a positive electrode layer, a negative electrode layer, an upper packaging layer and a lower packaging layer, wherein the positive electrode layer is composed of a positive electrode material with zinc ion intercalation / deintercalation activity; the negative electrode layer is composed of metal zinc and a carbon nanomaterial; the preparation method mainly comprises the following steps: preparation of a polyisophthaloyl metaphenylene diamine coated polyurethane curled nanofiber membrane, preparation of a polyvinyl alcohol hydrogel electrolyte, compounding of a curled nanofiber based gel electrolyte, loading of a positive electrode material, loading of a negative electrode material, and packaging of the integrated zinc ion battery. According to the design, the mechanical property of the gel electrolyte is remarkably enhanced through the curled nanofibers, the impedance can be effectively reduced and the ionic conductivity can be effectively improved through better interface contact, the relative displacement or separation between adjacent assemblies can be prevented through the unique integrated structure, and even if the surface of the battery is deformed, the continuous and effective ion transfer capacity in the battery can be ensured; therefore, the device has excellent structural design and stable electrochemical performance, and is expected to provide a new direction for the development of next-generation wearable energy storage devices.

The invention provides hydrogel capable of stably releasing hydrogen sulfide and a preparation method of the hydrogel. The preparation method comprises the following steps: (1) preparing polyvinyl alcohol hydrogel; (2) preparing modified PVA hydrogel; (3) preparing polylactic acid microspheres; and (4) preparing the hydrogel capable of stably releasing H2S. The hydrogel prepared by the invention has good thermal stability, cell compatibility and relatively high specific surface area, and can promote SRB adhesion and proliferation and improve the activity of SRB, so that hydrogen sulfide can be stably released, and a promising new method is provided for efficient and safe gas treatment of cancers.