769 results about "Ethyl cellulose" patented technology

The invention belongs to the field of electrode paste preparation, and provides low-temperature curing silver-coated copper paste for a heterojunction solar cell and a preparation method of the low-temperature curing silver-coated copper paste. Ethyl cellulose is adopted as a matrix material, a stable matrix network is provided for slurry through good cohesiveness and dispersity of ethyl cellulose, and a network structure with a high crosslinking degree is formed by adding modified phenolic resin, organic silicon modified epoxy acrylate and other chemical modification materials into the slurry. The mechanical strength and adhesive force of the slurry are further enhanced, surface modification is carried out on inorganic filler such as silver-coated copper powder and bismuth oxide through a silane coupling agent and a titanate coupling agent, and the interface bonding force between the filler and an organic matrix is enhanced through silicon-oxygen bonds formed on the surface of the filler; by adding the carboxylated polyamide wax and the organic bentonite, the agglomeration tendency of the filler is reduced by utilizing the adsorption and electrostatic repulsion effects of the carboxylated polyamide wax and the organic bentonite on filler particles, and the obtained conductive slurry has the characteristics of excellent conductivity and low-temperature rapid curing.

The invention relates to the technical field of dielectric materials, and discloses a composite dielectric material and a preparation method and application thereof.The composite dielectric material comprises filler and a base material, the filler is modified barium titanate, and the base material is cyanoethyl cellulose; the modified barium titanate comprises a barium titanate core and a shell, the shell comprises a polymer containing an epoxy group, the core and the shell are connected through a covalent bond, and an infrared spectrum test shows that in an infrared spectrogram of the modified barium titanate, characteristic peaks of the epoxy group and carbonyl respectively exist at 910 + / -10 cm <-1 > and 1720 + / -10 cm <-1 >. Epoxy groups in the modified barium titanate filler can react with hydroxyl groups in a cyanoethyl cellulose matrix material to form covalent linkage, compatibility of the filler and a matrix is improved, meanwhile, a potential well is formed, migration of carriers can be limited, and the composite material has good dielectric performance and energy storage performance.

The invention relates to the technical field of medicines, in particular to a sustained-release coating as well as a preparation method and application thereof. The coating adopts a three-layer gradient structure design and comprises an inner layer coating, a middle layer coating and an outer layer coating, and the layers are compounded and matched through ethyl cellulose and hydroxypropyl methylcellulose with different molecular weights and are combined with talcum powder filling amount with gradient decreasing and a triethyl citrate plasticizer, so that accurate regulation and control of drug release are realized. Through hierarchical swelling-diffusion dynamic balance, burst release is inhibited, the inner layer has high talcum powder content to resist initial swelling stress, the outer layer has low filling amount to maintain hydrophobic continuity, interface defects are reduced in combination with high-temperature curing, and the release stability and long-term storage performance of drugs such as dihydroergoline mesylate are remarkably improved; the problems of sudden release, damp-heat sensitivity, impurity generation and the like of a traditional single-layer coating are solved.

The invention relates to the technical field of ceramic substrates, in particular to a ceramic substrate blank powder coating and sintering process. Comprising the following steps: step 1, uniformly stirring boron nitride powder, terpilenol, ethyl cellulose, butyl benzyl phthalate and phosphate, and grinding to obtain coating powder; step 2, printing powder on the surface of the green body by using a silk-screen printing technology to form a powder pattern; a powder coating green body is obtained; step 3, stacking N powder-coated green bodies to obtain laminated green bodies; 4, the laminated green body is subjected to glue discharging sintering and sand blasting in sequence; and obtaining the ceramic substrate.

The invention relates to a sustained-release tablet capable of avoiding sudden release of a medicine after being taken together with an alcoholic beverage, the sustained-release tablet comprises a sustained-release tablet core and an anti-sudden-release material coating layer wrapping the sustained-release tablet core, and the anti-sudden-release material is composed of a polysaccharide substance and a cellulose derivative, the polysaccharide substance is selected from one or more of guar gum, xanthan gum and Arabic gum, the cellulose derivative is selected from one or more of hydroxypropyl methylcellulose, ethyl cellulose and hydroxyethyl cellulose, and the weight ratio of the polysaccharide substance to the cellulose derivative is 1: 1-10: 1. The sustained-release tablet disclosed by the invention has an excellent burst release resisting effect when being taken together with an alcoholic beverage, and the clinical medication safety and effectiveness of a preparation are improved.

A multi-fluid kit for three-dimensional printing can include a fusing agent and a nanoparticle-containing agent. The fusing agent can include water and a radiation absorber, where the radiation absorber absorbs radiation energy and converts the radiation energy to heat. The nanoparticle-containing agent can include a liquid vehicle, high density nanoparticles, and a nanoparticle suspension compound selected from the group consisting of terpineol, ethyl cellulose, and a combination thereof.

The invention discloses a preparation method of an ethyl cellulose and isocyanate cross-linked coated urea slow-release fertilizer, and relates to a preparation method of a urea slow-release fertilizer. The invention aims to solve the problems that the existing nitrogen fertilizer is low in utilization rate and easy to absorb moisture and cake, a polyurethane coating material is non-degradable, and pure ethyl cellulose is insufficient in mechanical strength and limited in water resistance and is not beneficial to being used as a coating matrix of the fertilizer. The method comprises the following steps: 1, preparing an ethyl cellulose cross-linked isocyanate enveloping solution; and 2, preparing the ethyl cellulose and isocyanate cross-linked coated urea slow-release fertilizer. According to the preparation method, etherified derivative ethyl cellulose of cellulose is taken as a raw material, and the defects that a pure ethyl cellulose membrane is insufficient in mechanical strength, limited in water resistance and low in nutrient separation control precision are overcome by utilizing isocyanate crosslinking modification. The prepared slow-release fertilizer has the advantages of being simple in process, low in cost, environmentally friendly, degradable in matrix, capable of effectively preventing urea from absorbing moisture and caking and the like, and is suitable for large-scale preparation and used in agricultural production.

The invention relates to the technical field of electrolytic copper foil processing, and particularly provides a method for reducing the rough surface roughness of an HVLP copper foil by using a composite additive, which comprises the following steps: step (1): enabling the composite additive to flow into a high-level tank through an additive flow pump, uniformly mixing the composite additive with a copper sulfate electrolyte, and enabling the mixture to flow into a crude foil machine; step (2), then adjusting process parameters of a crude foil machine, including current and line speed of a cathode roller; (3) foil generation and foil drawing are carried out; the composite additive comprises one or two of gelatin and collagen. One or more composite additives composed of gelatin, collagen, sodium dithiodipropane sulfonate, N, N-dimethyl-dithioformamide sodium propanesulfonate, 3-sulfydryl-1-sodium propane sulfonate, hydroxyethyl cellulose and polyethylene glycol are added into the raw foil electrolyte, so that the copper electrodeposition reaction potential can be effectively changed; and uniform and compact copper crystallization peaks are obtained, the rough surface roughness of the raw foil is reduced, and the uniformity of a plating layer is improved.

The invention relates to the field of solder materials, and provides a non-ferrous metal solder for low-temperature brazing and application, the solder is composed of carbon-coated copper nanorods, tin-bismuth alloy-coated silver nanoparticles, 2-mercaptobenzimidazole, rosin resin, an organic active agent, a dispersing agent, ionic liquid, hydroxyethyl cellulose, indium nitrate and citric acid. The silver particles are of a core-shell structure and are coated with tin-bismuth alloy layers, and continuous carbon layers are formed on the surfaces of the copper nanorods, so that the conductivity and the interface stability of the solder are effectively improved. The non-ferrous metal solder with excellent conductivity, low melting point and good wettability is prepared through step-by-step mixing, hot press molding and low-temperature heat treatment processes, and is suitable for electronic device packaging, power device connection and flexible circuit interconnection, and the defects of existing solder in the aspects of low-temperature welding and high conductivity are overcome.

The invention discloses a porous olivine tundish dry material and a preparation method thereof, and belongs to the technical field of tundish dry material processing, the porous olivine tundish dry material specifically comprises the following raw materials by mass: 80-100 parts of a composite sand material, 2-3 parts of silicon powder, 10-15 parts of a composite binder, 15-20 parts of modified aerogel and 4-7 parts of a sintering promoter, heat-resistant whiskers are prepared through a molten salt method, and the porous olivine tundish dry material is prepared through a hot melt method. The preparation method comprises the following steps: preparing a composite binder from a dry tundish material, carrying out centrifugal spinning to obtain modified zirconium oxide fibers with a hollow structure, and further preparing modified aerogel from the modified zirconium oxide fibers, aluminum chloride hexahydrate, hydroxyethyl cellulose and epoxy chloropropane, so that the high temperature resistance and mechanical properties of the cured dry tundish material are improved; and the mechanical property is also improved.

The invention discloses a water-retention synergistic coated slow-release fertilizer and a preparation method thereof, and relates to the technical field of water-retention slow-release fertilizers. The coated slow-release fertilizer sequentially comprises a fertilizer core, an inhibitor layer, a slow-release coating layer, a bonding layer and a water-retaining slow-release layer from inside to outside. Wherein the inhibitor layer is composed of a urease / nitrification inhibitor, the slow-release coating layer is composed of organic polymer resin, the bonding layer is composed of an ethyl cellulose binder, and the water-retaining slow-release layer is composed of a modified water-retaining agent. The coated slow-release fertilizer prepared by the invention has good water retention performance, controlled release performance and salt resistance, is suitable for high-salt soil, and can obviously improve the nitrogen fertilizer utilization rate. Meanwhile, the combination of polyglutamic acid and sulfonic acid groups is used for modifying polyacrylic acid to prepare the modified water-retaining agent, so that a synergistic effect on improving the salt resistance of the coated slow-release fertilizer is achieved, the fertilizer efficiency can be improved, the loss is reduced, the soil environment is improved, and the water-retaining capacity of soil and the utilization rate of the fertilizer are improved.

The invention discloses an environment-friendly straw shell-lac ethyl cellulose-based slow-release nitrogen fertilizer, a preparation method and application, shell-lac and ethyl cellulose are stirred and dissolved in absolute ethyl alcohol, straw and urea mixed powder is added into a shell-lac and ethyl cellulose mixed solution, dehumidification is performed after sufficient stirring, and a primary dehumidification mixed material is obtained after dehumidification is completed; and molding the primarily dehumidified mixed material into a cylindrical strip, and dehumidifying again to obtain a pre-pressed mixed material. And then placing the pre-pressed mixed material in a press machine for tabletting and forming, and continuously carrying out third dehumidification to obtain the primary slow-release nitrogen fertilizer. And uniformly spraying a proper amount of a sealing agent ethyl cellulose ethanol solution on the surface of the primary slow-release nitrogen fertilizer, and standing until the primary slow-release nitrogen fertilizer is naturally air-dried to obtain the environment-friendly straw shellac ethyl cellulose-based slow-release nitrogen fertilizer. The method is applied to the field of chemical fertilizer preparation, the problem that straw is difficult to treat is solved, waste can be turned into wealth, straw resources are fully utilized, the straw is made into the slow-release nitrogen fertilizer, and the utilization efficiency of the nitrogen fertilizer can be improved.

The invention discloses an efficient anticorrosive coating and a preparation method thereof, and relates to the technical field of coatings. The high-efficiency anticorrosive paint is prepared from a crosslinked membrane modified phytic acid loaded aluminum MCM-41 mesoporous silica composite synergistic filler, a polyurethane / epoxy resin composite emulsion system, titanium dioxide, a BYK-190 dispersing agent, a BYK-021 defoaming agent, a BYK-358N flatting agent, a BYK-425 thickening agent, hydroxyethyl cellulose and deionized water. A cross-linked membrane modified phytic acid loaded aluminum MCM-41 mesoporous silica composite synergistic filler is uniformly dispersed and deeply embedded into a polyurethane / epoxy resin composite emulsion system, countless chemical anchor points are established between the filler and a base material, and the interface bonding property with a resin system is also enhanced, so that the adhesive force of the coating is greatly improved, and meanwhile, the coating has the advantages that the service life of the coating is prolonged, and the service life of the coating is prolonged. And an active and passive three-dimensional protection system formed by the two is used for remarkably improving the corrosion resistance of the coating in the action modes of intelligent response, active repair and physical barrier.

The invention discloses an environment-friendly bio-based coated controlled-release fertilizer with multiple enzymolysis targets and a preparation method of the environment-friendly bio-based coated controlled-release fertilizer, and belongs to the technical field of controlled-release fertilizer production. The environment-friendly bio-based coated controlled-release fertilizer comprises a fertilizer core, an enzyme trigger type internal response layer and a pH sensitive trigger type outer layer, the enzyme trigger type internal response layer is prepared from cationic hydroxyethyl cellulose polyester polyol, an enzyme active site targeting modifier and a degradation accelerator; the pH sensitive trigger type outer layer is prepared from cationic hydroxyethyl cellulose polyester polyol and a covalent self-adaptive network modifier; the outer coating of the fertilizer disclosed by the invention can be degraded under the momentary excitation that the pH value in the coating is reduced after nutrients are released, and can promote degradation microorganisms in soil to be adsorbed to the enzyme-triggered internal response layer, so that the degradation of the internal coating is accelerated. The pH sensitive trigger type outer layer has a promoting effect on the enzyme trigger type inner response layer, and the promoting effect is enhanced by adding the degradation accelerator.

The invention provides sustained-release solid hydrogen peroxide as well as a preparation method and application thereof, and belongs to the technical field of hydrogen peroxide preparation, the sustained-release solid hydrogen peroxide comprises a hydrogen peroxide solution, a stabilizer, an excipient and a sustained-release agent, wherein the slow release agent is a compound of ethyl cellulose and chitosan, and the weight ratio of ethyl cellulose to chitosan is (1-2): 1; the addition amount of the slow-release agent is 0.5%-10% of the total mass of the slow-release solid hydrogen peroxide; according to the invention, ethyl cellulose (hydrophobic barrier) and chitosan (pH response degradation) are combined for use in the sustained-release agent, so that overhigh local concentration caused by concentrated release of hydrogen peroxide is avoided, and the explosion risk is reduced; the preparation method provided by the invention is a crystallization-drying integrated process, the production period can be shortened to 4 hours, while the traditional process needs more than 8 hours, and the energy consumption is reduced by 40%.

The invention provides a lime-sand polymerized building material for inhibiting saltpetering and a preparation method thereof, and belongs to the technical field of novel building materials, the material comprises a composite matrix material, a composite alkali activator, a slow-release organic acid microcapsule, a modified layered double-metal hydroxide and an saltpetering inhibiting auxiliary agent; the composite base material is formed by compounding fly ash and slag; the composite alkali activator is compounded by water glass and a NaOH aqueous solution; the slow-release organic acid microcapsule is prepared by coating a compound acid formed by mixing citric acid and tartaric acid with hydroxypropyl-beta-cyclodextrin and sodium alginate; the modified layered double hydroxide is prepared by calcining MgAl-LDH, then carrying out surface modification by a silane coupling agent, and then loading nano SiO2; the saltpetering inhibition auxiliary agent is compounded by phytic acid modified lignin microcapsules and thermal response carbonate; the phytic acid modified lignin microcapsule is prepared by modifying sodium lignin sulfonate with phytic acid and then coating with ethyl cellulose and polyvinyl alcohol; the thermal response carbonate is prepared by coating calcium carbonate with stearic acid.

The invention relates to the field of hydrophilic thermosensitive resin, in particular to hydrophilic thermosensitive resin as well as a preparation method and application thereof, and aims to solve the problems that an existing thermosensitive material is insufficient in hydrophilicity, an existing hydrophilic material is insufficient in thermosensitive performance, and a resin material cannot give consideration to both the hydrophilic material and the hydrophilic material at the same time. According to the resin, an imidazole structure is introduced into polyacrylamide and grafted into PNIPAM to form an amido bond, the hydrophilic performance of the PNIPAM is improved, ethyl cellulose is grafted onto amino-treated silicon dioxide to form an amido bond, and the hydrophilic performance of the resin is improved together with modified polyacrylamide blended PNIPAM; when the resin is applied to a specific medium or environment, the resin can show a corresponding response behavior on absorption or release of moisture according to the change of environment temperature, realizes effective regulation and control and induction on temperature and humidity, and can be applied to temperature-sensitive medical treatment, electronic packaging and other emerging technical fields.

The invention provides a nicotine orally disintegrating tablet with a multi-layer composite sustained-release structure and a preparation method of the nicotine orally disintegrating tablet. The nicotine orally disintegrating tablet comprises an inner layer, a middle layer and an outer layer, wherein the middle layer and the outer layer sequentially coat the inner layer from inside to outside; the outer layer comprises nicotine, instant starch and a lubricant; the middle layer comprises nicotine, ethyl cellulose, polyethylene glycol and a flow aid; the inner layer comprises the following components: nicotine nanoparticles coated with chitosan and sodium tripolyphosphate, an oral microenvironment regulator and a filling agent. According to the nicotine orally disintegrating tablet provided by the invention, due to the gradient coating structure design of the inner layer, the middle layer and the outer layer, the multi-stage accurate release of nicotine, namely early-stage quick release, middle-stage stable release and later-stage slow release, is realized, the reactions of dizziness, vomiting and the like caused by excessive release of nicotine are avoided, and the use comfort is improved. Meanwhile, the pH value of the oral cavity is adjusted, micro-ecological balance of the oral cavity is maintained, the content of volatile sulfide in breath is reduced, and breath is refreshed.

The invention provides a hydrogel fire extinguishing additive, a preparation method thereof and a fire extinguishing agent. The hydrogel fire extinguishing additive comprises the following raw materials in parts by mass: 1-3 parts of a gelatinizing agent, 1-4 parts of a thickening agent, 1-3 parts of a stabilizer, 2-5 parts of a cross-linking agent, 1-3 parts of a surfactant, 2-6 parts of a phosphorus flame retardant and 3-5 parts of an antifreeze agent. The gelatinizing agent is selected from one or more of methyl cellulose, hydroxypropyl methyl cellulose and hydroxyethyl cellulose; the thickening agent is selected from one or more of sodium carboxymethyl cellulose, konjac glucomannan, sodium alginate, sodium polyacrylate and xanthan gum; the cross-linking agent is selected from one or more of calcium chloride, magnesium sulfate, calcium sulfate, magnesium chloride, potassium chloride and sodium nitrate. The temperature and pH double-response hydrogel fire extinguishing agent provided by the invention has the characteristics of quick response capability, high-temperature stability, good environmental adaptability, safety and environmental protection, and can be well used for efficient extinguishing and continuous cooling control of a lithium ion battery fire.

The invention relates to the technical field of shoe materials, in particular to a bio-based EVA-containing composite shoe material and a preparation method thereof, and the bio-based EVA-containing composite shoe material is prepared from the following raw materials in parts by weight: a bio-based EVA polymer, bio-based TPU, a cross-linking agent, a compatilizer, a nucleating agent, filler, a foaming agent, a plasticizer, a flexible component, a biodegradation accelerant, a non-polyolefin elastomer and maleic anhydride grafted polyethylene wax. Wherein the compatilizer can be ethylene-vinyl alcohol and the like; the nucleating agent can be nanoscale talcum powder and the like; the filler can be ethyl cellulose and the like; the foaming agent is an azodicarbonamide foaming agent; the biodegradation accelerant is prepared from immobilized lipase, a tannic acid-Fe < 3 + > complex and surface carboxylated TiO2. The preparation method comprises two steps of mixing granulation and supercritical foaming. The composite shoe material provided by the invention has good biodegradability, can reduce environmental pollution, and maintains excellent physical and mechanical properties at the same time.

The invention discloses cefixime granules and a preparation method thereof, the granules comprise cefixime, a filler, an adhesive, a wetting agent, a flavoring agent and pharmaceutically acceptable auxiliary materials, and the filler is a calcium hydrophosphate-hydroxyethyl cellulose compound. The cefixime granules prepared by the invention are simple in preparation method, stable in quality, non-degradable, not easy to generate impurities, better in suspension performance, better in dissolution performance, qualified and stable in quality after long-term storage, simple in preparation process and suitable for industrial mass production under damp and hot conditions.

The present invention discloses a method for preparing a waterproof and oil-proof barrier material and its application in waterproof and oil-proof paper. The method comprises the following steps: dispersing dried nanocellulose particles in an organic solvent, adding a long-chain alkyltrimethoxysilane modifier thereto, wherein the mass ratio of the nanocellulose particles to the long-chain alkyltrimethoxysilane is 1:1-6, to obtain a liquid A; and compounding the liquid A with ethyl cellulose, wherein the mass ratio of the nanocellulose particles to the ethyl cellulose is 5:1-5, to obtain a waterproof and oil-proof barrier material. When the waterproof and oil-proof barrier material is applied to paper, a layer of nanostructure with good film-forming properties is formed on the surface. This structure can resist the penetration of water and grease, and has excellent waterproof and oil-proof green barrier properties.

The invention relates to the technical field of air purifying materials, in particular to a negative oxygen ion air purifying agent and a preparation method thereof.The negative oxygen ion air purifying agent is prepared from ethyl cellulose, hydroxyethyl acrylate, citric acid activated bentonite, beta-cyclodextrine, neodymium-doped tourmaline powder, modified plant essential oil, propylene glycol and carboxymethylcellulose. Sodium polyaspartate and a pH buffer agent. According to the invention, through a triple technology of terpene-free essential oil selection, metal ion modification and beta-cyclodextrin coating, the problem of negative ion consumption of traditional essential oil is avoided, and the release amount and durability of negative oxygen ions are remarkably improved through a catalytic synergistic effect.

The invention discloses a beta-alanine sustained release preparation, the sustained release preparation takes beta-alanine as a core material and a non-allergen wall material as an embedding material, and the non-allergen wall material is pea protein and / or ethyl cellulose. The sustained-release preparation disclosed by the invention is appropriate in release rate, not only can effectively relieve side effects generated after taking beta-alanine, but also can meet the health-care function of improving athletic ability in a short time, so that the beta-alanine sustained-release preparation disclosed by the invention can be widely applied to foods and / or health-care products.

The invention relates to the field of all-solid-state battery material preparation, and particularly discloses a composite positive electrode binder and a preparation method thereof, a positive plate and a preparation method thereof, and an all-solid-state battery, the composite positive electrode binder comprises a first high polymer material and a second high polymer material, and the molecular weight of the high polymer materials is 104-106; the first high polymer material comprises at least one of poly (ethylene-methacrylate-glycidyl methacrylate), poly (ethylene-glycidyl methacrylate) and polyglycidyl methacrylate; the second high polymer material comprises at least one of hydrogenated nitrile butadiene rubber (HNBR), nitrile butadiene rubber (NBR), ethyl cellulose (EC), styrene butadiene rubber (SBR) and polyvinylidene fluoride (PVDF); the binder is rich in polar groups, can be easily dissolved in a non-polar solvent, and does not damage sulfide electrolyte. The prepared positive pole piece has the ion / electron conductivity higher than that of a traditional binder, a lithium ion transmission channel can be widened, and the cycle performance of the battery is improved.

The invention discloses a tooth whitening gel and a preparation method thereof. The tooth whitening gel comprises the following components in percentage by mass: 5%-25% of a film-forming agent, 0.1%-15% of peroxide, 0.1%-15% of a regulator and 45%-94.8% of a volatile solvent, the film-forming agent is modified ethyl cellulose, and the preparation method comprises the step of treating ethyl cellulose by adopting one or more of irradiation, illumination, oxidation, heating, mechanical pulverization and grinding to obtain the modified ethyl cellulose. The preparation method of the tooth whitening gel comprises the step of uniformly mixing the raw materials including the film-forming agent, the peroxide, the regulator and the volatile solvent to obtain the tooth whitening gel. The tooth whitening gel provided by the invention can be ensured not to be dissolved by saliva after being smeared on teeth, and can be ensured to be completely removed when being removed.

The invention belongs to the technical field of female private part nursing, and particularly relates to andrographolide gel as well as a preparation method and application thereof. The invention provides an andrographolide gel, which is prepared from the following components in parts by mass: 0.1 to 0.5 part of andrographolide, 2.0 parts of caprylic / capric polyethylene glycol glyceride, 5.0 parts of propylene glycol, 0.05 to 0.2 part of chitosan, 10.0 parts of 1 percent W / V lactic acid solution, 0.15 to 0.6 part of hydroxyethyl cellulose and 30.0 parts of water. The andrographolide, the caprylic / capric polyethylene glycol glyceride, the propylene glycol, the chitosan, the 1% W / V lactic acid solution, the hydroxyethyl cellulose and the water are combined for use, the proportion of the components is strictly limited, and the obtained andrographolide gel can effectively inhibit vaginal pathogenic bacteria (including candida chromosomes, escherichia coli, staphylococcus aureus and gardnerella); the traditional Chinese medicine is used for treating fungal vaginitis and has no irritation to vaginal tissues.

The present invention discloses a semaglutide oral patch and a preparation method and application thereof, belonging to the field of pharmaceutical preparations. The oral patch comprises the following ingredients: 0.3-0.8 parts of semaglutide, 0.3-0.8 parts of an absorption enhancer, 1-2 parts of a film former and 0.2-0.5 parts of a plasticizer; wherein the film former is composed of hydroxypropyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose. The oral patch of the present invention has the advantages of high drug loading, high bioavailability, excellent demoulding, mechanical properties, taste and no drug precipitation, and is used to treat type 2 diabetes.

The invention discloses a compound rumen bypass guanidinoacetic acid additive as well as a preparation method and application thereof, and belongs to the technical field of animal feed additives. The compound rumen bypass guanidinoacetic acid additive provided by the invention is prepared from the following components in parts by mass: 40 to 60 parts of guanidinoacetic acid, 0.1 to 0.5 part of selenium yeast, 5 to 10 parts of nicotinamide, 5 to 12 parts of DL-methionine, 0.01 to 0.05 part of vitamin B12, 1 to 3 parts of compound probiotics, 3 to 5 parts of hydroxypropyl methyl cellulose, 1 to 2 parts of ethyl cellulose, 15 to 25 parts of hydrogenated palm oil and 3 to 5 parts of glyceryl monostearate. The compound probiotics comprise bacillus subtilis and saccharomyces cerevisiae. The compound additive provided by the invention can significantly improve the daily gain of ruminants and reduce the feed-gain ratio, and meanwhile, due to the improvement of the energy utilization efficiency and the enhancement of the antioxidant ability, the immunity of animals is improved, the morbidity is reduced, and the meat quality is improved.

The invention discloses a friction nano-generator, which comprises an ethyl cellulose modified porous conductive material and a flexible polymer material, wherein the ethyl cellulose modified porous conductive material contains a metal electrode plate, and the flexible polymer material is used for packaging the ethyl cellulose modified porous conductive material. The invention also discloses a preparation method of the friction nano-generator, and the method comprises the following steps: S1, modifying the porous conductive material with a hydrolyzed silane solution, drying the modified porous conductive material, attaching a metal electrode plate to one end of the porous conductive material, and soaking the porous conductive material in an ethyl cellulose solution to obtain an ethyl cellulose modified porous conductive material; and S2, packaging the ethyl cellulose modified porous conductive material by using a flexible polymer material to obtain the friction nano-generator. The friction nano-generator obtained by the invention can collect vibration information in the operation of mechanical equipment, and is applied to vibration waveform recognition as a sensor.