54results about How to "Simple and fast manufacturing method" patented technology

The invention provides a sodium-ion battery positive electrode material and a preparation method thereof, a sodium-ion battery and electric equipment, and relates to the field of sodium-ion batteries. The positive electrode material of the sodium ion battery provided by the invention comprises an inner core and a shell, wherein the shell covers the inner core; the chemical formula of the inner core is NaaNixFeyMnzM1-x-y-zO2, wherein a is more than or equal to 0.9 and less than or equal to 1.05, x is more than 0 and less than 1.0, y is more than 0 and less than 1.0, z is more than 0 and less than 1.0, and 1-x-y-z is more than 0 and less than 1; the chemical formula of the shell is NaLarCa1-rO2, wherein r is more than 0 and less than 1; in the inner core, the element M comprises one or more of Al, Mg, Ti, Zr, Y, La, Ca, Zn, Cu, W, Li and B. The sodium-ion battery positive electrode material provided by the invention can reduce residual alkali on the surfaces of particles, can inhibit side reaction with an electrolyte, and improves the performance stability of the positive electrode material.

The invention relates to the technical field of hydrogel spray preparations, in particular to hydrogel containing plant exosomes as well as a preparation method and application of the hydrogel. The invention provides hydrogel containing plant exosomes, the hydrogel comprises plant exosome freeze-dried powder and a hydrogel base solution, and the plant exosome freeze-dried powder comprises houttuynia cordata exosome powder, aloe exosome powder and honeysuckle exosome powder in a mass ratio of (1-2): (2-4): (1-2). The plant exosome compound has excellent effects of resisting inflammation, inhibiting bacteria and promoting epidermal cell proliferation; the plant exosome and the temperature-sensitive hydrogel are subjected to complementary synergism in the medication mode and the treatment effect, the temperature-sensitive hydrogel containing the plant exosome can effectively increase the diabetic foot ulcer wound repair speed, and the hydrogel can slowly release the exosome and treatment factors contained in the exosome to achieve the treatment effect. The selected biodegradable hydrogel is quick and long in curative effect, and the influence of waste generated after treatment on the environment is not increased.

The invention discloses a nano imbibition oil displacement agent as well as a preparation method and application thereof. The preparation method of the nano imbibition oil-displacing agent comprises the following steps: reacting citric acid, glucose, long-chain amine, a surfactant, an organic solvent, short-chain alcohol and water at 140-200 DEG C under 0.4-0.5 MPa for 6-16 hours to obtain the nano imbibition oil-displacing agent. The method disclosed by the invention is simple, convenient, environment-friendly and low in cost, and the prepared nano imbibition oil displacement agent has good surface and interface activity at high temperature and high salt, can be used as an imbibition oil recovery agent for an ultra-low permeability reservoir, and can remarkably improve the oil recovery rate.

The invention provides a rapid self-driven anti-icing material and a preparation method thereof. The rapid self-driven anti-icing material comprises a modulus span formed by at least two materials, a Z-axis perpendicular to a substrate direction, and an upper'hard (high-modulus material) 'structure and a lower'soft (low-modulus material)' structure distributed along the Z-axis direction, the surface of the large-area rapid self-driven anti-icing material is provided with a microstructure (micron-scale or nano-scale, continuous or discontinuous, isotropic or anisotropic wrinkles, micro-columns, grooves, inverted triangular bulges and the like). And the surface has an isotropic continuous wrinkle structure (figures), and has modulus span (hard at the upper part and soft at the lower part) in the Z-axis direction. The material can realize zero-energy-consumption deicing (only under the action of self gravity of ice deposits or wind power) without depending on a lubricating layer.

The invention discloses paenibacillus kribbensis exopolysaccharide and application thereof in prevention and control of iridovirus diseases of micropterus salmoides. The invention provides a paenibacillus kribbensis exopolysaccharide. The paenibacillus kribbensis exopolysaccharide is prepared from a fermentation product of a paenibacillus kribbensis space mutation delta PS04-17 strain. As a fish feed additive, the paenibacillus kribbensis exopolysaccharide has better in-vivo safety, has a promoting effect on the growth of the largemouth bass, and can promote the growth and weight gain of the largemouth bass and reduce the feed coefficient of the largemouth bass. Meanwhile, as a drug for resisting LMBV virus infection, the compound can inhibit expression of viruses in target tissues, alleviate virus-induced fish body target tissue structure damage and reduce the death rate caused by virus infection. Besides, the paenibacillus kribbensis exopolysaccharide serving as a disease-resistant immunopotentiator can maintain intestinal health of the micropterus salmoides, is simple to prepare, low in cost and easy to obtain in quantity, and provides more products and methods for prevention and control of the iridovirus disease of the micropterus salmoides.

The invention discloses a liquid metal flexible circuit manufacturing method based on a paper-based seal, and belongs to the field of intelligent manufacturing. Firstly, a hollowed-out mask of a circuit pattern is carved on adhesive sticker printing paper, the hollowed-out paper-based mask is pasted to a transparent adhesive film, the paper-based seal of a hollowed-out structure is manufactured, and the adhesive sticker printing paper is composed of an upper layer surface material, a middle adhesive layer and lower layer release paper; secondly, liquid metal is evenly squeezed into a groove formed in the hollowed-out position of the paper-based seal; thirdly, the upper-layer surface material is torn off, the lower-layer release paper of the paper-based seal is attached to the flexible substrate, then the remaining paper-based seal is torn off, and a liquid metal circuit pattern on the flexible substrate is obtained; and finally, uniformly spraying a protective coating on the surface to obtain the liquid metal flexible circuit. The thickness of the manufactured liquid metal flexible circuit is only less than 30 microns, and flow migration caused by the too thick liquid metal layer can be effectively prevented; the manufacturing method is simple, convenient and rapid, and has a wide application prospect in the field of manufacturing of flexible wearable equipment.

The invention discloses stimuli-responsive ionic conductive hydrogel as well as a preparation method and application thereof. The preparation method comprises the steps that a hydrogel precursor solution containing a cross-linking agent, a phase change regulating agent, a photoinitiator, water and PEDOT: PSS is provided, the cross-linking agent comprises laponite, and the phase change regulating agent at least comprises N-isopropylacrylamide; irradiating the hydrogel precursor solution with ultraviolet light, and curing to obtain blocky conductive hydrogel; and fully contacting the blocky conductive hydrogel with a zinc salt solution containing zinc ions to prepare the stimulus-responsive ion conductive hydrogel. The stimulus-responsive ionic conductive hydrogel prepared by the invention can realize good mechanical properties, adhesion performance and conductivity, has sensing performance to strain and temperature, can be prepared into a strain / temperature sensor, and realizes high sensitivity and fast response speed; in addition, a synaptic device can be prepared.

The invention relates to a ruthenium-based catalyst, a preparation method thereof and application of the ruthenium-based catalyst in water electrolysis hydrogen production, the ruthenium-based catalyst is a porous material, and the content of ruthenium element is 70% or above in percentage by mass; a characteristic peak of elemental ruthenium exists in an XRD spectrogram of the ruthenium-based catalyst. When the catalyst disclosed by the invention is used as a cathode catalyst or an anode catalyst in water electrolysis hydrogen production, the catalyst has good mass transfer effect and conductivity, excellent catalytic activity and excellent stability.

The invention relates to the technical field of elastic materials and refrigerator door sealing strips, in particular to a plant-based thermoplastic elastomer material and a preparation method and application thereof. The plant-based thermoplastic elastomer material contains a chlorinated polyethylene material, a polyethylene material, polyvinyl chloride, a plasticizer, a stabilizer, a lubricant, an antibacterial and mildew-proof agent, plant powder and a coupling and dispersing compatilizer. Wherein the plasticizer is a plant-based plasticizer; the particle size of the plant powder is 12-20 [mu] m. According to the plant-based thermoplastic elastomer material, the elastomer chlorinated polyethylene (CPE) is adopted as a main material, application of a traditional plasticizer is avoided, the low-odor plant-based plasticizer is adopted, odor is reduced, meanwhile, plant powder with plant faint scent is applied as filler, the hardness needed by the refrigerator sealing strip material can meet the sealing effect of a refrigerator, and the service life of the refrigerator is prolonged. And the problem of peculiar smell during door opening of the refrigerator is solved, the low-temperature performance is improved, and the method can be better applied to the field of manufacturing industry needing low-temperature sealing.

The invention belongs to the technical field of light conversion materials, and provides a carbon dot capable of absorbing ultraviolet light and green light, a light conversion film and a preparation method and application of the light conversion film. The preparation method of the carbon dots capable of absorbing the ultraviolet light and the green light comprises the following steps: mixing o-phenylenediamine, acrylic acid and water, then carrying out hydrothermal reaction, and sequentially carrying out centrifugation, filtration, dialysis and freeze drying on a reaction product, so as to obtain the carbon dots capable of absorbing the ultraviolet light and the green light. A light conversion film prepared by using the carbon dots capable of absorbing the ultraviolet light and the green light as a light conversion agent can be used for plant growth. The light conversion film not only can block and absorb ultraviolet light and convert the ultraviolet light into spectrums absorbed by plants in a blue light area and a red light area, but also can block and absorb green light and convert the green light into spectrums absorbed by the plants in the red light area, so that the photosynthesis of the plants is improved, the germination, growth and development of plant seeds are promoted, and the crop yield is increased.

The invention discloses a preparation method of colloidal silicon dioxide, which comprises the following steps: adding an organic alkali solution into ultrapure water, then adding a proper amount of alkoxy silane, stirring to obtain a clear and transparent solution, and then adding a stabilizer solution to obtain hydrolysate; adding an organic alkali solution into a certain amount of hydrolysate to obtain a mother solution; heating the mother liquor to 90-100 DEG C, and preserving heat for at least 10 minutes to obtain a silicon dioxide crystal nucleus; heating the crystal nucleus until the crystal nucleus is boiled, and dropwise adding hydrolysate under the condition that the pH value of a system is 9.0-10.5 to prepare a dilute silicon dioxide solution; and removing excess water from the dilute silicon dioxide solution in a boiling state to obtain colloidal silicon dioxide. The preparation method is simple, convenient and stable in process. The obtained colloidal silicon dioxide nanoparticles are very high in purity, and the total metal impurity content is 1t; the pH value is 9.0-10.5, the particle size is 20-80 nm, the solid content is 20-40%, and the polishing agent is very suitable for being applied to an integrated circuit polishing process.

The invention discloses an enhanced anti-fluorescence quenching mounting medium as well as a preparation method and a mounting method thereof, particularly relates to the technical field of immunofluorescence, and aims to solve the problems that a fluorescent dye is rapidly attenuated under the irradiation of strong exciting light and the like in the prior art. Every 100 mL of the mounting medium comprises 15-30 mL of an acid-base buffer solution, 10-20 mL of a viscosity modifier, 0.5-5 g of a fluorescence quenching resistant compound, 1-15 mL of a synergist and the balance of distilled water, and the fluorescence quenching resistant compound comprises triethylene diamine and ethylenediaminetetraacetic acid. The mounting medium provided by the invention can enhance the overall fluorescence brightness and maintain the stability of fluorescence under excitation light, thereby realizing more accurate quantification of fluorescence signals.

The invention provides a self-supporting catalytic electrode with a heterostructure as well as a preparation method and application of the self-supporting catalytic electrode. The self-supporting catalytic electrode comprises carbon cloth and nanosheets vertically loaded on the surface of the carbon cloth, and the nanosheets are cobalt-copper double hydroxide nanosheet arrays modified by copper particles. According to the self-supporting catalytic electrode provided by the invention, cobalt-copper double hydroxides (Cu-coated CoCu LDH / CC) modified by copper particles and having nanosheet morphology are formed on the surface of carbon cloth. Based on the unique composition, morphology and electronic structure, the electrode can serve as a cathode electrocatalyst and an anode electrocatalyst at the same time to be used for efficient electrocatalytic reduction of nitrate into ammonia and electrocatalytic oxidation of polyethylene glycol terephthalate (PET) hydrolysate into formate, and value-added treatment of PET waste plastics and nitrate wastewater is achieved.

The invention discloses a garment three-dimensional modeling design method, which is characterized in that three-dimensional cutting is carried out in a mode of cutting a hollow geometric figure fabric, an operator can realize manufacturing of various three-dimensional garments by changing the shape of the hollow geometric figure fabric without professional knowledge of garments, and the requirements of different consumers can be met. The manufacturing method is simple and convenient, a large amount of time is not needed, and the production cost is reduced. Meanwhile, the jacket is made of the four-way stretch fabric, and when the jacket is designed by using the fabrics with different hollow geometric figures, the materials of the fabrics with the hollow geometric figures are adaptively selected, so that the wound skirt hem is convenient to form a three-dimensional structure. Besides, in the whole costume design process, only the shell fabric with the holes in the hollow geometric pattern shell fabric is cut off, generated waste materials are few, and the utilization rate of the shell fabric is increased.

The invention discloses a functional monomer based on chitosan oligosaccharide imine derivatives as well as a preparation method and application thereof, chitosan oligosaccharide (COS) and 4-allyloxybenzaldehyde (4-AB) are taken as raw materials,-NH2 of COS and-CHO of 4-AB are subjected to condensation reaction through Schiff base reaction, and the chitosan oligosaccharide imine derivatives are successfully prepared. The structure of a target derivative is characterized by adopting an infrared spectrum, a high-resolution mass spectrum and a carbon nuclear magnetic resonance spectrum, and the target derivative is used as a novel functional monomer to be applied to preparation of molecularly imprinted polymers (MIPs); the synthesis method disclosed by the invention has the advantages of rapidness, simplicity, no need of filtration and dialysis, mild reaction conditions, low cost, high yield and the like, and the synthesized chitosan oligosaccharide imine derivative (COS / 4-AB = 1: 2, mmol / mmol) can be used as a novel molecular imprinting functional monomer and is expected to play an important application value in the aspects of MIPs preparation and the like.

The invention discloses oxidized sodium alginate / polyvinyl alcohol fluorescent hydrogel capable of rapidly gelling as well as a preparation method and application of the oxidized sodium alginate / polyvinyl alcohol fluorescent hydrogel, and belongs to the technical field of hydrogel preparation. The preparation method provided by the invention comprises the following steps: adding sodium periodate into a sodium alginate aqueous solution for oxidation, dialyzing and drying to obtain oxidized sodium alginate; dissolving oxidized sodium alginate in water, adding aminophenylboronic acid and an activating agent, and reacting to obtain a phenylboronic acid-based oxidized sodium alginate solution; and mixing the phenylboronic acid-based oxidized sodium alginate solution with the polyvinyl alcohol solution, and stirring for 8-20 seconds to obtain the water treatment agent. The preparation method disclosed by the invention is simple and convenient, very rapid in gel forming, low in equipment cost and suitable for large-scale preparation; the prepared hydrogel is excellent in swelling property, and emits blue light under ultraviolet irradiation; meanwhile, the property is stable, the pH response and active oxygen response characteristics are achieved, self-healing can be achieved, and good application prospects are achieved in the fields of tissue repair and fluorescent falsification prevention.

The invention discloses a superfine medium-entropy nanoparticle catalyst for electrochemical oxidation of ethylene glycol and other micromolecules as well as a preparation method and application of the superfine medium-entropy nanoparticle catalyst. The catalyst comprises a superfine medium-entropy nano-particle metal material and a conductive substrate material, the superfine medium-entropy nano-particle metal material comprises copper metal and at least two precious metals, and the catalyst has outstanding catalytic ability. The preparation method of the catalyst is simple and convenient, and only the superfine medium-entropy nanoparticle metal material needs to be synthesized through a solvothermal method and is loaded on the conductive substrate material; the temperature of the whole synthesis process is lower than 200 DEG C, so that the problems of high cost, high energy consumption, poor stability, large potential safety hazard and the like in the traditional synthesis method are solved. The superfine medium-entropy nanoparticle catalyst prepared by the invention shows excellent performance in oxidation of micromolecules such as electro-catalysis ethylene glycol and the like. By taking ethylene glycol electrooxidation as an example, the Pb-CuPtPd MEANs-C can efficiently and stably convert ethylene glycol into glycollic acid, the mass activity of the Pb-CuPtPd MEANs-C under 0.9 V vs.RHE reaches up to 14 A mg <-1 > PtPd, and the Faraday efficiency (FEGA) of glycollic acid production is 82.3%.

The present invention provides a super corrosion resistant high entropy alloy and a preparation method, and relates to the technical field of high entropy alloys. The super corrosion resistant high entropy alloy comprises Ti, Zr, Nb, Ta, Hf, Mo, and Cr, wherein at least two of the three elements Ti, Nb, and Ta, and any combination of Zr, Mo, Hf, and Cr. The preparation method prepares the super corrosion resistant high entropy alloy by pretreatment, smelting, and molding. The present invention utilizes smelting of a variety of pure metal elements to form button ingots, and then utilizes cooling circulating water to cool the copper mold to suck-cast the alloy. The prepared material can form a dense passivation film to protect the matrix in a harsh corrosive environment; and the prepared super corrosion resistant high entropy alloy has excellent and stable mechanical properties and super corrosion resistance as a whole, and the production and preparation methods of the connector are simple and convenient, so it is conducive to large-scale industrial promotion and production practice.

The present invention provides an atomic-level flat device with a microstructure, which comprises, from bottom to top, a substrate, a bonding material, a second dielectric layer located on the substrate, a microstructure, and a first dielectric layer, wherein the surface of the first dielectric layer is an atomic-level smooth surface. The present invention also provides a method for preparing the atomic-level flat device with a microstructure, which can effectively avoid pits or burrs generated in the existing microstructure processing process.

The present invention discloses a preparation method and application of a MXene-poly eutectic-based conductive elastomer, comprising the following steps: preparing a clear, transparent, and performance-adjustable polymerizable eutectic solvent ternary system by a "one-pot method" by mixing a hydrogen bond acceptor choline chloride with a hydrogen bond donor acrylic acid and acrylamide; further adding a two-dimensional monolayer Ti3C2T x The nanosheets obtain a prepolymer solution of a multi-hydrogen bond network, and finally, under ultraviolet light initiation conditions, in-situ photopolymerization is performed to obtain a MXene / poly eutectic self-healing conductive elastomer. The preparation process of the present invention is simple, efficient, and green, and reduces the production cost of the material and the complexity of the process technology. The present invention improves the conductivity and strain sensitivity of the elastomer, enriches the hydrogen bond network composition in the conductive elastomer, and ensures the room temperature self-healing properties of the conductive elastomer. The conductive elastomer prepared by the present invention can be used for strain sensing detection for monitoring different human activities.

The application provides a method for simultaneously synthesizing thioether compounds and nitrile compounds, and belongs to the technical field of organic synthesis; the thioamide compound, fluoride and acetonitrile are mixed, then a phenylacetylene precursor is added, so that the thioether compound and the nitrile compound are simultaneously synthesized at room temperature; the method is simple and fast, does not need transition metal catalysis, has a wide substrate range, the fluoride source used is cheap and easy to obtain, and does not cause environmental pollution; the method has the advantages of simple process, mild reaction condition, good universality and the like, and the yield of the synthesized thioether compound and nitrile compound is very high, the thioether compound and the nitrile compound can reach 98% at most, and has extremely high industrial popularization value.

The invention discloses a high-rate sodium-ion battery positive electrode material and a preparation method thereof, and belongs to the technical field of sodium-ion battery electrodes. Aiming at the problem that the capacity and the cycle performance of the current sodium ferric sulfate material under high magnification are still not ideal enough, ferrous sulfate heptahydrate is roasted in an inert atmosphere to obtain anhydrous ferrous sulfate. Anhydrous FeSO4, anhydrous Na2SO4, anhydrous MgSO4 and / or anhydrous CaSO4 and the flash graphene are subjected to ball-milling mixing reaction according to a certain mass ratio, and a roasting precursor is obtained. And sintering in a rotary tube furnace protected by inert atmosphere to obtain the single-crystal magnesium ferric sulfate (and / or calcium) sodium composite positive electrode material. Mg and / or Ca elements are doped and introduced, so that a crystal structure of a sodium ferric sulfate crystal is distorted to a certain extent, the delocalization capability of outer layer electrons of Fe atoms is improved, meanwhile, the forbidden bandwidth of sodium ferric sulfate is reduced, and the conductivity of the material is obviously improved. The rate characteristic of the sodium ferric sulfate positive electrode material is greatly improved, and the method is particularly suitable for being applied to the field of large-scale energy storage.

This invention belongs to the field of feed technology, specifically relating to a beef cattle feed containing Artemisia annua and its preparation method. Artemisia annua is added to an acetic acid aqueous solution, boiled at a specified temperature for a specified time, filtered, and cooled. The cooled Artemisia annua is then mixed with forage to obtain the beef cattle feed containing Artemisia annua. The preparation method of this application is simple and convenient, greatly improving the palatability of Artemisia annua and effectively increasing its utilization rate. Furthermore, experiments have shown that feeding cattle with the beef cattle feed prepared in this application as roughage does not adversely affect their growth and development; the average weight gain of cattle is the same as that fed with ordinary roughage. Moreover, the beef cattle feed of this application can reduce the incidence of foot-and-mouth disease in cattle, helping them resist the disease.

The invention relates to the technical field of catalyst preparation, and discloses a preparation method of a high-dispersion copper-based catalyst and application of the high-dispersion copper-based catalyst in preparation of CHDM, the preparation method comprises the following steps: (1) adding a copper salt, a manganese salt, an aluminum salt and a rare earth metal salt into water, and dissolving to obtain a mixed salt solution; sodium hydroxide and sodium carbonate are added into water to be dissolved, and a mixed alkali solution is obtained; (2) reacting the mixed salt solution and the mixed alkali solution in a micro-liquid membrane reactor, after the reaction is completed, carrying out crystallization reaction on the obtained suspension, and then centrifuging and drying to obtain a quaternary hydrotalcite precursor; and (3) roasting and reducing the quaternary hydrotalcite precursor to obtain the copper-based catalyst. According to the copper-based catalyst, Cu nanoparticles are highly dispersed on the surface of a composite metal oxide, the copper-based catalyst is applied to 1, 4-cyclohexanedicarboxylic acid dimethyl ester reaction hydrogenation for preparing 1, 4-cyclohexanedimethanol, excellent catalytic activity and stability are shown, and CHDM has a high trans-cis ratio.

The invention discloses a method for preparing a gallium-doped hollow ZSM-5 molecular sieve through microwaves and application of the gallium-doped hollow ZSM-5 molecular sieve, and relates to the technical field of molecular sieve catalyst preparation. The preparation method comprises the following steps: mixing a silicon source, a template agent and deionized water, stirring to prepare a precursor, transferring the precursor into a digestion tank, carrying out microwave hydrothermal treatment, and roasting in a muffle furnace to remove the template agent to obtain a pure silicon molecular sieve; the method comprises the following steps: taking a pure silicon molecular sieve, adding an aluminum source, a template agent and deionized water, carrying out ultrasonic treatment, transferring into a digestion tank, carrying out microwave hydrothermal and dissolution-recrystallization, and roasting the obtained product in a muffle furnace to remove the template agent so as to obtain a hollow ZSM-5 molecular sieve; the method comprises the following steps: taking a hollow ZSM-5 molecular sieve, adding gallium nitrate and deionized water, carrying out ultrasonic treatment, transferring into a digestion tank, and carrying out gallium doping under microwave irradiation; and putting the dried product into a tubular furnace, and carrying out heat preservation in an argon atmosphere at 200-300 DEG C to obtain the gallium-doped hollow ZSM-5 molecular sieve. The microwave hydrothermal process and the dissolution-recrystallization process are combined, so that the preparation time of the hollow ZSM-5 molecular sieve is effectively shortened, and the energy consumption is reduced.

This invention provides a biological filter media ceramic particle for removing perchlorate from water and its preparation method. The preparation method of the biological filter media ceramic particle of this invention includes mixing the filter media ceramic particle with an iron modifier and performing a shaking treatment to obtain iron-modified biological filter media ceramic particle. The iron modifier impregnation of the biological filter media ceramic particle ensures sufficient contact between iron ions and the biological filter media ceramic particle, thereby loading the iron ions onto the biological filter media ceramic particle. The modified biological filter media ceramic particle can remove phosphorus, ammonia nitrogen, and COD, and also enhances the adsorption capacity of the biological filter media ceramic particle for perchlorate, which can significantly improve the removal efficiency of the biological filter media ceramic particle for perchlorate.

The present application relates to a kind of polybenzidine nanofiber and its preparation method, the polybenzidine nanofiber length is 43~67 μm, and the length-diameter ratio is 120~256.Its preparation method is as follows: benzidine is dissolved in solvent, when the system pH value is 3~6, benzidine and hydrogen peroxide occur oxidation polymerization reaction under the catalysis of divalent copper salt to obtain polybenzidine nanofiber.The polybenzidine nanofiber provided by the present application morphology is regular and controllable and has high length-diameter ratio, and conductivity is high, as a kind of semiconductor high polymer material has potential application prospect in battery, supercapacitor.

The invention discloses an oral biomimetic mineralized oncolytic adenovirus, a preparation method thereof and an application of the oral biomimetic mineralized oncolytic adenovirus in preparation of antitumor drugs. The preparation method comprises the following steps: 1) culturing homologous tumor cells; 2) preparing a membrane extraction buffer solution; 3) preparing a homologous tumor cell membrane; 4) preparing the homologous tumor cell membrane coated oncolytic adenovirus particles; 5) preparing a suspension; (6) centrifuging the suspension; removing supernatant to obtain precipitate; (7) adding absolute ethyl alcohol into the precipitate, resuspending, and centrifuging; supernate is removed; and 8) repeating the step 7) to obtain the oral biomimetic mineralized oncolytic adenovirus. The mineralized shell of the product can help the oncolytic adenovirus to still have complete activity when the oncolytic adenovirus reaches the intestinal tract after oral administration, the oncolytic adenovirus is wrapped by a homologous tumor cell membrane, the tumor targeting property of the oncolytic adenovirus is improved, the anti-tumor effect of the oncolytic adenovirus is enhanced, and experiments prove that the product has a good application prospect. The oral biomimetic mineralized oncolytic adenovirus disclosed by the invention has an inhibition effect on human pancreatic cancer cells and human colon cancer cells.

The invention belongs to the technical field of gas sensors, and provides a carbon quantum dot modified zinc oxide gas sensor and a preparation method thereof. The carbon quantum dot modified zinc oxide gas sensor comprises a substrate with a wrinkle structure, a gas sensitive unit and a packaging cavity, the gas sensitive unit comprises a zinc oxide nanowire array and carbon quantum dots modified on the surface of the zinc oxide nanowire array. In the sensor disclosed by the invention, the gas sensing unit growing on the surface of the substrate with the wrinkle structure can increase the gas contact area, and the carbon quantum dots modified on the surface of the zinc oxide nanowire array are used for enhancing the gas adsorption effect, so that the purposes of improving the sensitivity and the selectivity and reducing the detection temperature are achieved; the method can be used for high-sensitivity acetone gas detection.

The invention provides a method for preparing porous polyaniline / polylactic acid conductive fiber, comprising the following steps: (1) preparing polyaniline / polylactic acid nanofibers: grinding and mixing polyaniline and camphorsulfonic acid in a ratio of 0.8 / 1-1.2 / 1, then dissolving the ground sample in a hexafluoroisopropanol solvent to prepare a 10-20 mg / mL solution, stirring thoroughly and filtering using a polytetrafluoroethylene filter membrane with a pore size of 0.22-0.45 μm, adding polylactic acid in a ratio of 80-120 mg / mL to the filtered polyaniline / camphorsulfonic acid / hexafluoroisopropanol solution and stirring thoroughly, electrospinning the precursor solution to obtain a polyaniline / polylactic acid nanofiber membrane; and (2) preparing a porous structure of polyaniline / polylactic acid fiber: immersing the polyaniline / polylactic acid nanofiber membrane prepared by electrospinning in an acetone / ethanol blended solvent to obtain a polyaniline / polylactic acid nanofiber with a porous structure. The present invention utilizes volatile solvent to soak fibers to form holes, and removes the solvent by solvent volatilization, without any excess components remaining.