59results about How to "Biodegradable" patented technology

The invention belongs to the field of pesticide and chemical fertilizers, and particularly discloses a granular slow-release water-soluble fertilizer and a preparation method thereof.The granular slow-release water-soluble fertilizer is prepared from, by weight, 2-5 parts of a slow-release material and 60-70 parts of an element water-soluble fertilizer; wherein the element water-soluble fertilizer comprises liquid ammonia, phosphorus pentoxide, sulfuric acid, zinc sulfate, potassium sulfate, ammonium nitrate phosphorus and monoammonium phosphate; the sustained-release material comprises lignin and PLA, and the granular sustained-release water-soluble fertilizer is high in quick-acting property, less in permeation loss and long in drug release time.

The invention discloses a preparation method of a slow-release oxygen agent for reducing methane emission, which mainly comprises the following steps: preparing a PHB (polyhydroxybutyrate) solution, adding CaO2, copper sulfate (CuSO4) and goethite (FeO (OH)) into the PHB solution, and drying to prepare a spherical degradable slow-release oxygen agent embedded with CaO2 / CuSO4 / FeO (OH). The degradable slow-release oxygen agent prepared by the invention can inhibit methane generation and promote methane oxidation consumption, gets rid of the limitation that only the methane generation process is inhibited and the methane oxidation consumption is not promoted when CaO2 is directly added, and effectively solves the water quality problems that the action period is short, the pH is increased and the like when powder CaO2 is added. The invention further discloses an application method of the slow-release oxygen agent for reducing methane emission, the slow-release oxygen agent is added into slow-flow water body sediments in a shallow injection mode of 4-8 cm under mud, the utilization efficiency of oxygen in CaO2 and the emission reduction effect on methane in the sediments can be improved, and the action depth of the slow-release oxygen agent on the slow-flow water body sediments is increased.

The invention discloses a pesticide microcapsule and application thereof, and belongs to the technical field of pesticides. The pesticide microcapsule is prepared by the following method: adding pesticide active ingredients into ethyl acetate, then adding polylactic acid, and uniformly stirring to obtain an organic phase; the pesticide active ingredient is composed of a bifenthrin-clothianidin compound and piperine according to a mass ratio of 1: (1-3); dissolving polyvinyl alcohol in water to obtain a water phase; under an ice-water bath condition, dropwise adding the organic phase into the water phase, and simultaneously stirring to form an emulsion; and stirring, evaporating, centrifuging, washing and drying the emulsion to obtain the pesticide microcapsule. The bifenthrin, the clothianidin and the piperine are compounded to prepare the pesticide microcapsule, so that the pesticide resistance of pests due to the action of a single medicament is effectively avoided, the piperine not only directly has a toxic effect on the pests, but also can enhance the insecticidal effect of the bifenthrin and the clothianidin, and 1 + 1gt is realized; and 2, a synergistic effect is achieved.

The invention discloses a preparation method and application of flame-retardant radiation refrigeration cellulose foam, and belongs to the technical field of material science. The method comprises the following steps: firstly, adding cellulose fibers, inorganic nanoparticles and a surfactant into a cellulose derivative solution, and preparing uniform cellulose fiber wet foam in a high-speed stirring manner; and then, drying the wet foam to finally obtain the cellulose fiber foam material with excellent flame retardance and radiation refrigeration performance. The prepared cellulose fiber foam has a graded porous structure, can effectively reflect sunlight and emit infrared light, and has excellent radiation refrigeration performance. In addition, inorganic nanoparticles are introduced into the foam material, so that the radiation refrigeration capacity of the material is further improved, and meanwhile, the foam is endowed with a good flame-retardant characteristic.

The invention discloses a cartilage targeted penetrating liposome loaded with piezoelectric tetrapeptide PZE201 as well as a preparation method and application of the cartilage targeted penetrating liposome. The method comprises the following steps: preparing PZE201 tetrapeptide by using a chemical synthesis method; the preparation method comprises the following steps: synthesizing DSPE-PEG-CAQK by adopting a sulfydryl-maleimide Michael addition reaction; dissolving DSPE-PEG-CAQK, soya bean lecithin, DOTAP and cholesterol in ethanol, heating, stirring, and carrying out ultrasonic dispersion to obtain an organic phase; the preparation method comprises the following steps: dissolving PZE201 in a PBS (Phosphate Buffer Solution), heating, violently stirring, and dispersing under a vortex and ultrasonic quadruple process to prepare a water phase; respectively loading the organic phase solution and the water phase solution into an injector, and preparing a crude liposome solution through a double-phase micro-channel mixing process; the liposome constructed by the invention is simple and convenient in preparation method and mild in preparation condition, realizes accurate, stable, efficient and safe electrical stimulation on cartilage in vivo and in vitro, relieves cartilage injury, and effectively improves osteoarthritis symptoms.

The invention discloses a method for granulating a phosphate tailing, phosphate tailing particles prepared therefrom, and applications thereof, and belongs to the technical field of waste resource recovery and safe utilization. The method for granulating a phosphate tailing of the invention comprises the following steps: uniformly mixing tannic acid, lignin sulfonate, and tea saponin to obtain a composite binder; uniformly mixing the composite binder with the phosphate tailing powder to perform granulation, wherein the tannic acid and lignin sulfonate undergo a complex reaction, and the tea saponin increases fluidity and surface activity, so that the composite binder penetrates into the interior of the phosphate tailing powder to exert a bonding effect, thereby preparing phosphate tailing particles. The phosphate tailing particles prepared by the invention have excellent granulation rate, particle strength, and solubility.

The invention discloses a straw powder filled biodegradable composite material and a preparation method thereof, and relates to the technical field of biodegradable composite materials, the preparation method of the biodegradable composite material comprises the following steps: S1, pretreating straw; s2, impurities are removed through winnowing; s3, removing magnetic impurities; s4, cleaning and drying; s5, performing high-pressure steam treatment; s6, drying in the oven and crushing again; s7, adding into a high-speed mixer and mixing; s8, extruding the biodegradable composite material, and cooling and shaping the biodegradable composite material; and S9, cutting and polishing are conducted, and performance testing is conducted. The biodegradable composite material is prepared from agricultural waste, waste accumulation is reduced, sustainable development is promoted, the straw powder filled biodegradable composite material has biodegradability, high strength and good processability, and the straw powder filled biodegradable composite material is suitable for large-scale production. The problems of reducing agricultural wastes, enhancing mechanical properties and environmental protection performance, improving processability and reducing raw material cost can be solved.

The invention discloses a water-resistant and oil-resistant paper-based coating, a preparation method and a water-resistant and oil-resistant paper product, and belongs to the technical field of paper-based packaging materials. Hydrophobic modification is achieved through the esterification reaction of stearic acid and the chemi-mechanical pulp CNF, meanwhile, high-pressure homogenization treatment is combined, it is ensured that the hydrophobic chemi-mechanical pulp CNF is evenly dispersed, and the hydrophilic problem of the CNF is fundamentally solved; meanwhile, the prepared oil-proof agent takes soy isolate protein as a substrate, sodium-based montmorillonite is matched to form a synergistic oil-proof system, and a hydrophobic chemithermomechanical pulp CNF dispersion liquid and an oil-proof agent dispersion liquid are used for constructing a coating on the surface of a paper base, so that the coating has excellent water resistance and oil resistance at the same time. The coating prepared by the invention has good compatibility with a paper-based material, and subsequent paper can be degraded along with the paper-based material after being discarded, so that the problem of white pollution caused by a polyethylene spraying film is thoroughly abandoned; the chemical-mechanical pulp CNF raw material has the green property of being degradable and renewable, so that the green, environment-friendly, safe and sustainable coating system is realized.

This invention relates to the field of polymer foaming materials technology, and discloses a plant fiber composite nucleating agent for microfoaming of biodegradable materials and its application. The plant fiber composite nucleating agent is made from raw materials comprising the following parts by weight: 80-95 parts of primary ultrafine plant fiber powder, 5-20 parts of surface modifier, and 0.1-5 parts of dispersing lubricating wax; the surface modifier and dispersing lubricating wax are coated on the surface of the primary ultrafine plant fiber powder. The application steps are as follows: adding the plant fiber composite nucleating agent to a biodegradable material matrix to obtain a pre-foaming blend, introducing foaming gas or adding a chemical foaming agent for foaming treatment. The nucleating agent of this invention improves the compatibility between plant fibers and hydrophobic biodegradable matrices, provides heterogeneous nucleation sites in the matrix while increasing the polymer melt strength, inhibits cell coalescence and rupture, and obtains microfoamed materials with uniform pore size. Furthermore, the nucleating agent itself is completely biodegradable.

The invention provides a surfactant and a preparation method and application thereof.The surfactant has the structure shown in the formula (I), raw materials of the surfactant are derived from phlorenic acid, ferulic acid and hydrogenated ferulic acid, and the surfactant has the advantages of being environmentally friendly and biosafe; a hydrophobic part in the structure contains an ester functional group, and has the characteristic of biodegradability; according to the surfactant disclosed by the invention, the hydrophilic size and the surface activity of the surfactant can be adjusted by controlling the length of polyoxyethylene, and the hydrophobic size and the surface activity of the surfactant can be adjusted by selecting fatty alcohols with different carbon numbers for esterification.

The present invention addresses the problem of providing brand new crosslinked resin particles having biodegradability. Provided are crosslinked resin particles containing a biodegradable resin having a glass transition temperature of less than 0 DEG C and having a gel fraction of 50% or more.

This invention discloses a green, low-consumption, high-performance radiative cooling material, comprising the following components by mass percentage: 40%~60% bio-based composite matrix, 20%~35% green inorganic radiative cooling filler, 1%~3% bio-based dispersant, 2%~5% bio-based crosslinking agent, 15%~30% deionized water, and 0.5%~2% bio-based additives. The bio-based matrix and green inorganic filler achieve high performance with a solar reflectivity ≥95% and an atmospheric window emissivity ≥96%. The solvent-free material selection eliminates the need for high-temperature calcination during preparation and application, achieving the green goals of no high temperature, no organic solvents, and biodegradability, making it suitable for environmentally friendly applications.

The invention discloses a chitosan metal MOF modified polyurethane thermal insulation material and a preparation method thereof, and belongs to the field of polyurethane material preparation. The polyurethane thermal insulation material comprises the following raw materials in percentage by mass: 8-10% of metal MOF modified carboxymethyl chitosan, and a preparation method of the metal MOF modified carboxymethyl chitosan comprises the following steps: mixing a carboxymethyl chitosan solution, an organic ligand compound and a cross-linking agent to obtain a mixed solution, and adding metal salt into the mixed solution, stirring until the solid is completely dissolved, carrying out high-temperature reaction, filtering, washing, drying, and grinding to obtain the metal MOF structure modified carboxymethyl chitosan. The carboxymethyl chitosan is used as a main body, and an MOF material with numerous special independent spaces is introduced to modify the carboxymethyl chitosan, that is, the space structure of the carboxymethyl chitosan is modified while metal is introduced, so that the prepared polyurethane thermal insulation material has excellent thermal insulation effect and flame retardant effect.

This invention discloses an oil-resistant, high-temperature, fast-dissolving, edible packaging film and its preparation method, belonging to the field of biodegradable polymer materials technology. By mass percentage, the raw materials for preparing this oil-resistant, high-temperature, fast-dissolving, edible packaging film include 0.5-5.0% hydroxypropyl methylcellulose, 0.1-1.5% sorbitol, 1.0-9.0% gelling agent, 0.05-1.0% coagulant, and the balance being water. The gelling agent comprises carrageenan, low-acyl gellan gum, and xanthan gum in a mass ratio of 1:0.1-0.3:0.01-0.05, with the mass ratio of hydroxypropyl methylcellulose to xanthan gum being 1:0.01-0.1. This invention rationally combines three gelling components with different properties, along with hydroxypropyl methylcellulose and sorbitol, to achieve good mechanical properties and oxygen barrier properties, while also achieving high-temperature fast dissolution and oil resistance.

The invention discloses a TSS-SBFO coating agent for storage and preservation of perishable fruits and a preparation method of the TSS-SBFO coating agent. The coating agent prepared from the sphaeros gum, the artemisia desertorum gum, the silk fibroin peptide, the sea buckthorn fruit oil and the glycerol can be used for storage and preservation of perishable fruits, and has good oxidation resistance. The coating agent prepared by the invention can be directly coated on the surfaces of perishable fruits in a soaking manner, the use method is simple, good light transmittance can be maintained while the ultraviolet transmittance is reduced, and the effects of keeping fresh, resisting oxidation and maintaining a good state of the fruits can be achieved.

The invention belongs to the technical field of deacidification of high-acid crude oil and distillate oil thereof, and particularly relates to application of a deep eutectic solvent in deacidification of crude oil and distillate oil thereof. The deep eutectic solvent provided by the invention comprises a hydrogen bond acceptor, a hydrogen bond donor and a cosolvent, the hydrogen bond acceptor comprises choline chloride and / or betaine, the hydrogen bond donor comprises one or more of p-ethylphenol, phenol, malic acid and maleic acid, and the cosolvent is water; the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1: (2-4). The deep eutectic solvent provided by the invention can efficiently remove naphthenic acid in crude oil and distillate oil, the deacidification rate can reach 90% or above, and the solvent can be recycled, is not easy to cause an emulsification phenomenon, and is environment-friendly. The method provided by the invention is simple to operate, convenient to use and suitable for deacidification treatment of high-acid crude oil and distillate oil thereof.

The application of PCE-11 as a modifier in the flotation separation of brucite and serpentine relates to the field of brucite beneficiation and purification technology. This invention provides a flotation separation method for brucite and serpentine using PCE-11 as a modifier. By introducing PCE-11, the difference in floatability between brucite and serpentine during flotation is amplified, achieving effective separation of brucite and the gangue mineral serpentine. This invention has advantages such as high efficiency, low cost, no pollution, and simple process.

The invention discloses a high-alkali and high-residual copper-molybdenum separation wastewater treatment method. The treatment method comprises the following steps: simultaneously injecting acidic wastewater percolating from a waste rock storage yard in a mining area and high-alkali and high-residual copper-molybdenum separation wastewater into a mixing tank, adding a certain amount of a catalyst and an oxidizing agent to carry out catalytic oxidation reaction, and then adding a certain proportion of circulating slurry and carbide slag-lime milk mixed liquid into another reaction tank, aerating to fully mix and react until the pH value is neutral, entering a degassing and flocculating tank, adding a flocculating agent, finally entering a thickening tank for precipitation, and lifting clear liquid to a high-level water tank through a pump for mineral separation production; one part of underflow (neutralized slurry) is used as circulating slurry, and the other part of underflow (neutralized slurry) is output for treatment; a catalytic oxidation treatment process is adopted for high-alkali and high-residual copper-molybdenum separation wastewater formed by mixing acidic water, copper and sulfur concentrate overflow water and copper-molybdenum separation alkaline wastewater, the treated water quality reaches the national wastewater discharge standard, return water can be recycled, and the wastewater treatment efficiency is improved.

A slow-release composite fiber membrane for encapsulating passion fruit peel flavonoids by electrospinning and its preparation method are disclosed. The composite fiber membrane is prepared by coaxial electrospinning and consists of a core layer and a shell layer. The core layer is a carrier solution containing passion fruit peel flavonoids, and the shell layer is a biodegradable polymer solution. The composite fiber membrane has an encapsulation rate of ≥85% for passion fruit peel flavonoids and possesses antioxidant and slow-release properties. Chitosan, gelatin, zein, and β-cyclodextrin are used as spinning wall materials, and passion fruit peel flavonoids extracted by DES method are used as the functional core material. Efficient encapsulation, controlled release, and stabilization of flavonoids are achieved through coaxial electrospinning. This invention solves the problems of easy oxidation, photothermal instability, poor water solubility, and low bioavailability of flavonoids.

The invention provides a bamboo-based biomass foaming material and a preparation method thereof. The bamboo-based biomass foaming material is derived from bamboo cellulose; wherein the bamboo-based biomass foaming material is of a three-dimensional network structure, and the three-dimensional network structure is formed by stacking micro-scale polyhedral cell walls; in addition, pore structures are formed among at least part of the polyhedral cell walls. The three-dimensional network structure of the bamboo-based biomass foaming material is mainly composed of micro-scale polyhedral cell walls, pore structures are arranged among at least part of the polyhedral cell walls, and the bamboo-based biomass foaming material which is excellent in performance and environmentally friendly is obtained.

The invention belongs to the technical field of medicines, and particularly relates to a brain-targeted liposome for delivering mRNA (messenger ribonucleic acid) as well as a preparation method and application of the brain-targeted liposome. The liposome ingeniously utilizes the similar structure of PMPC and acetylcholine, can efficiently pass through BBB and target brain and hippocampus, and realizes personalized accurate delivery of mRNA to realize safe and effective prevention and treatment of brain diseases. The preparation method of the liposome comprises the following steps: (1) synthesizing PMPC-CPADN; (2) synthesizing DSPE-PMPC (Distearoyl Pyrrolidone- (3) preparation of lipidosome: mixing SM-102, DSPC, cholesterol, DSPE-PMPC and DMG-PEG (Dimethyl Glycol-Polyethylene Glycol) according to a certain molar ratio to prepare a lipidosome solution; the lipidosome can be used for preparing the lipidosome / mRNA compound, and the lipidosome / mRNA compound can be used for preparing medicines for treating brain diseases. The PMPC modified brain-targeted liposome for delivering mRNA is stable in physicochemical property, effectively protects mRNA from being degraded by nuclease, and can load mRNA and deliver the mRNA to the brain.

The invention relates to the technical field of medical implantable optical and electrical integrated devices, in particular to a composite functional degradable optical fiber and a preparation method and application thereof. The composite functional degradable optical fiber provided by the invention has the characteristics of biodegradability and high flexibility, permanent foreign body reaction can be avoided, and the biocompatibility is greatly improved. According to the composite functional degradable optical fiber provided by the invention, based on the unique physical characteristics of the up-conversion nanoparticles, the inherent synergistic treatment of PBM and PDT under the driving of a single near-infrared light source is realized. According to the composite function degradable optical fiber provided by the invention, a treatment-feedback closed-loop system architecture of minimally invasive monitoring is integrated, and a good hardware basis is provided for realizing self-adaptive treatment. The composite functional degradable optical fiber provided by the invention can be applied to the field of medical implantation instruments, the field of neural engineering or the field of biological materials, and particularly can be applied to brain implantation materials or brain degenerative disease self-adaptive treatment systems.

The utility model discloses a disposable biological safety cabinet operation auxiliary isolation film, including support frame, bearing roller, isolation film and force storage unwinding mechanism, support frame is provided with two, and bearing roller rotation is connected between two adjacent support frames. In the utility model, through setting isolation film as three layer structure, make isolation film not only have "transparent, prevent alcohol, degradable" characteristics, still through the electrostatic adsorption ability of bottom layer electrostatic layer fixed, need not sticky glue, not only avoided sticky glue failure problem, also will not leave residual in biological safety cabinet inner surface, through the pertinence design, solved the dental oral cavity isolation film "size is not suitable, easy to break, fixed unstable, clean complicated problem in biological safety cabinet scene, more meet the laboratory high safety, high efficiency operation demand, in addition, the volute spring in force storage unwinding mechanism drives the bearing roller fast rotation through the force storage, realizes the quick unwinding of isolation film.

This invention relates to the field of water pollution control materials technology, specifically disclosing a method for preparing a quaternary ammonium salt modified starch-chitoxin composite gel. First, chitoxin powder is added to a green solvent to obtain a chitoxin solution. Then, a quaternary ammonium salt modified starch dispersion is added to obtain a chitoxin composite solution containing quaternary ammonium salt modified starch. Next, repeated freeze-thaw cycles are performed to obtain a viscous composite. A crosslinking agent is added dropwise to the composite to obtain a crosslinking gel precursor. Finally, the crosslinking gel precursor is soaked in alcohol and washed until neutral to obtain the quaternary ammonium salt modified starch-chitoxin composite gel. The green solvent is a urea-water system of NaOH, KOH, or LiOH; the crosslinking agent is epichlorohydrin or epichlorohydrin. The application of the quaternary ammonium salt modified starch-chitoxin composite gel in the removal of micro / nanoplastics from water is also disclosed. This invention aims to solve the problems of complex synthesis processes, high production costs, and easy secondary pollution associated with existing micro / nanoplastics adsorbent materials.

The invention discloses a PBS household degradable floss pick and a preparation method thereof. The dental floss pick prepared by the invention structurally comprises a dental floss pick body, a dental floss head arranged at one end of the dental floss pick body and a toothpick head arranged at the other end of the dental floss pick, the dental floss pick body is made of a modified poly (butylene succinate) material, and the dental floss is made of a UHMWPE (Ultra High Molecular Weight Polyethylene) material. The household floss pick disclosed by the invention not only has excellent mechanical property and heat resistance, but also has biodegradability, does not increase environmental load, can be degraded under the action of microorganisms existing in nature in soil, sandy soil, compost, anaerobic digestion or aqueous culture solution, and can be used for preparing the household floss pick. And finally, completely degrading into carbon dioxide, methane, water and mineralized inorganic salts of elements contained in the carbon dioxide, the methane and the water.

This invention discloses a preservation film, preservation device, and preservation method for edible fungi. The film includes a preservation film substrate in which phosphorescent materials are dispersed. The phosphorescent materials emit light with wavelengths of 470-580 nm under ultraviolet light excitation. The ultraviolet-phosphorescent dual-effect preservation film constructed by this invention can continuously release room-temperature phosphorescence after short-term ultraviolet excitation, achieving a low-energy, intermittent, and long-lasting dual-preservation light response, avoiding tissue damage and accelerated water loss caused by prolonged direct UV irradiation. Furthermore, the composite material used is biodegradable, low-cost, and environmentally friendly.

The application discloses a special dust-settling agent under a tunnel construction environment and a preparation method thereof. The application relates to the field of dust-settling agent preparation under a tunnel construction environment, and solves the problems of high preparation cost, difficulty in large-scale production and limited dust-settling performance of the existing dust-settling agent preparation method. In the application, polyvinyl alcohol, guar gum and itaconic acid are subjected to graft copolymerization reaction under nitrogen protection at 60 DEG C-70 DEG C, N,N'-methylene bisacrylamide crosslinking agent is added to form a chemical crosslinking network, and then the chemical crosslinking network is compounded with a surfactant to obtain the dust-settling agent. The dust-settling agent does not need low-temperature freezing and thawing treatment, can significantly reduce equipment energy consumption and production cost, is convenient for industrialized production, has good film-forming property, moderate viscosity and long water-retention duration, and can efficiently inhibit diffusion of dust generated in tunnel construction.

This invention discloses a flexible triboelectric nanogenerator (TENG) based on a superhydrophobic thin film, comprising a positive friction layer and a negative friction layer. The positive and negative friction layers are made of flexible thin films as the electrode base materials, and both electrodes are based on flexible materials. A gap exists between the positive and negative friction layers, and the edges of the two friction layers are electrically connected. At the connection points, the two friction layers can contact each other to generate positive and negative static charges, and electrons flow between the two electrode layers to form alternating current. By using flexible thin films as the electrode base materials for the positive and negative friction layers, this invention achieves a high dielectric constant while maintaining the flexibility and stretchability of the polymer matrix, effectively improving the output power of the TENG and resulting in better electrical performance.

The invention relates to the field of high polymer materials, and provides degradable glycolic acid copolyester and a method for preparing the degradable glycolic acid copolyester by using a titanium catalyst aiming at the problem that a catalyst of the glycolic acid copolyester contains heavy metal or is easy to hydrolyze, and the method comprises the following steps: (1) putting a polyester raw material and the titanium glycolate catalyst into a reaction kettle for esterification reaction to obtain an ester; the polyester raw materials comprise glycollic acid and elements; and (2) carrying out condensation polymerization on the ester, a stabilizer and an antioxidant to obtain the degradable glycolic acid copolyester. The titanium glycolate catalyst used in the invention is green and eco-friendly, has high affinity to glycolic acid monomers, and can improve the utilization rate of glycolic acid, and the obtained copolyester has good biodegradability. The invention also provides the degradable glycollic acid copolyester prepared by the method, and the product has good hue, high intrinsic viscosity and good biodegradability.

The invention provides rigid polyurethane foam as well as a preparation method and application thereof. The polyurethane rigid foam is prepared from the following raw materials: bio-based polyol and an isocyanate compound, and the bio-based polyol is a reaction product of a lactic acid prepolymer and epoxidized vegetable oil. The polyurethane rigid foam provided by the invention has biodegradability, higher compression strength, lower density and good heat conductivity coefficient, and can be used in the fields of thermal insulation of thermal insulation boxes, refrigerators and freezers, freight packaging buffer spacers and the like.