462 results about "Ultrasonic emulsification" patented technology

The invention discloses a method for preparing pesticide emulsion in water by ultrasonic emulsification and a pesticide emulsion in water prepared by the method. Compared with the prior art, the pesticide emulsion in water, which is prepared by the method of the invention, has smaller particle size range, thus the pesticide emulsion in water has the advantages of favourable stability, high pesticide effect and the like; meanwhile, compared with the currently universal high-shear and homogenizing emulsification, the emulsion in water, which is prepared by ultrasonic emulsification, has the advantages of simple preparation, high production efficiency, low cost, high emulsification quality and the like.

The invention provides a silicone oil microcapsule with slow-release characteristics and a preparation method thereof, relating to the field of new chemical materials. In the invention, ethyl orthosilicate or methyl orthosilicate, non-functional linear silicone oil and silane coupling agents with long-chain alkyl are used as oil phases, silicone oil microcapsule dispersion liquid taking silicon dioxide as a shell is prepared by the following steps of: compounding anionic surface active agents with nonionic surface active agents into emulsifying agents; carrying out ultrasonic emulsification to obtain miniemulsion; stirring at room temperature for hydrolysis; and finally regulating pH value; wherein the silicone oil microcapsule dispersion liquid taking silicon dioxide has grain diameter of 140-260 nanometers and solid content of 13%-20%. The silicone oil microcapsule has high storage stability and good slow-release characteristics and can be directly used for the preparation of high-durability hydrophobic coating.

The invention provides a method for preparing a degradable dry beancurd preservation packaging film. The method comprises the following steps: adding soybean protein isolates to deionized water, adjusting the pH value and stirring the materials to obtain soybean protein solution; adding pectin to deionized water and stirring the materials to obtain pectin solution; blending the soybean protein solution with the pectin solution, adding a plasticizer and essential oil and carrying out ultrasonic emulsification to obtain film liquid; and pouring the film liquid into an organic glass tank to be formed, drying the formed product in the hot air environment and tearing off the film, thus obtaining the preservation packaging film. The method has the following advantages that 1) interaction between polysaccharides and protein molecules is fused, thus enhancing the moisture resistance and mechanical performances of the preservation packaging film; 2) time is saved by ultrasonic emulsification, the energy consumption is lower than that in the high pressure homogenization method and the emulsion is stable; 3) the loaded essential oil can endow the film material with excellent bacteriostasis performance; and 4) the total number of colonies of the dry beancurd is effectively reduced by utilizing the preservation film to package the dry beancurd.

The invention provides a polystyrene/calcium alginate composite gel microsphere in a nuclear shell structure and a preparation method thereof, relating to biopolymer materials. The polystyrene/calcium alginate composite gel microsphere in the nuclear shell structure takes a polystyrene microsphere as a core and calcium alginate gel as a shell, wherein the grain size of the core is 1-100 microns, and the thickness of the shell layer is 50-800 nm. The preparation method comprises the following steps of: mixing polystyrene microsphere with aqueous solution containing a surface active agent I, and carrying out ultrasonic emulsification to obtain mixed solution A; adding sodium alga acid solution in the mixed solution A, and stirring to obtain mixed solution B; adding organic solution containing a surface active agent II into the mixed solution B, and stirring to obtain mixed solution C; adding calcium chloride solution which has the same volume with the sodium alga acid solution into the mixed solution C under stirring to react, and carrying out vacuum filtration, washing the solution until no calcium ion residue exists on the surface and drying to obtain a product D; and dispersing the product D into water, centrifuging the mixture, pouring out supernate and taking out precipitate to obtain the product.

The invention discloses a polylactic acid-capsaicin nano-capsule and preparation method thereof. The method comprises the following steps: (1) preparing a dichloromethane solution of polylactic acid and capsaicin; (2) preparing a polyvinyl alcohol aqueous solution; (3) adding the solution in step (1) into the solution in step (2) and performing ultrasonic emulsification to obtain an emulsion; (4) heating the emulsion in step (3) to 40-50 DEG C to obtain a white emulsion and filtering the emulsion by a 100 nm microporous filter membrane to obtain a colloidal solution; (5) centrifuging the colloidal solution in step (4) to obtain a solid and vacuum drying the solid to obtain a polylactic acid nano-capsule. The polylactic acid nano-capsule of the present invention has a small particle size with a distribution of 30-90 nm; and the raw materials are biodegradable, is benefic to environment protection; the preparation process is simple, of low production cost, and easy to carry out. The prepared polylactic acid nano-capsule of capsaicin is applicable to adhesives, paints, electrical wires, cables, communication facilities, medicine, etc.

The invention relates to an intelligent ophthalmic ultrasonic emulsification apparatus, comprising a host machine of a surgical apparatus, an ultrasonic handle, an image collection system and a foot brake, wherein the host machine of the surgical apparatus comprises a signal generator, a process and affected-part state identification system, a negative-pressure flow control system, an energy control system and a touch/display device. The ultrasonic handle is provided with three keys including an optical identification key, a loading identification key and an energy control key. The intelligent ophthalmic ultrasonic emulsification apparatus can realize intelligent operation of ultrasonic emulsification apparatus and reduce the work intensity of doctors.

The invention relates to the field of preparation of a catalyst and particularly relates to a preparation method of a noble-metal-supported catalyst. The preparation method of the noble-metal-supported catalyst, disclosed by the invention, comprises the following steps: 1) dissolving a metal oxide precursor in water to prepare a water phase; dissolving a noble metal precursor in an oil-phase solvent to prepare an oil phase; 2) mixing the water phase and the oil phase in the step 1 with a surfactant in a volume ratio within a range from (1 to 10) to (1 to 3); carrying out ultrasonic emulsification to form a water-in-oil emulsion, wherein the surfactant accounts for 2.0-20% of the total volume or the total mass of the water-in-oil emulsion; 3) carrying out steps of atomizing, igniting, combusting, cooling and clustering on the water-in-oil emulsion to prepare noble-metal-supported catalyst powder. According to the preparation method disclosed by the invention, a preparation process is simple, continuous and easy to control and has theoretical and practical application values.

The invention relates to a piezoelectric ultrasonic compound transducer which can generate large displacement amplitude in the longitudinal direction and is particularly applicable to the technical field of liquid high-strength ultrasonic processing such as ultrasonic disintegration, ultrasonic emulsification and ultrasonic degradation. In order to achieve the effects, the large-amplitude sandwich-type piezoelectric ultrasonic compound transducer comprises a longitudinal vibration sandwich-type piezoelectric ultrasonic transducer body, a longitudinal vibration variable cross-section metal tube amplitude transformer and a bending vibration metal disk. By the adoption of the technical scheme, compared with a traditional piezoelectric ultrasonic transducer, the large-amplitude sandwich-type piezoelectric ultrasonic compound transducer has larger displacement amplitude and higher ultrasonic radiation intensity, impedance matching between the transducer and loaded liquid is improved, ultrasonic energy can be more effectively transmitted to a load through the ultrasonic transducer, and the ultrasonic radiation efficiency is improved.

The invention discloses a method for preparing mono-disperse polymer functional microspheres with a photochemical method. According to the invention, under the regulation of a reversible addition-fragmentation chain transfer (RAFT) reagent, polymer functional microspheres with various sizes such as nano-grade sizes and micron-grade sizes, and with uniform particle sizes are synthesized by using the photochemical method. First, mono-functional group carbon-carbon double-bond monomers, multifunctional group carbon-carbon double-bond cross-linking agents, monomers containing functional groups, a dispersing agent, a stabilizing agent, the RAFT reagent, a photoinitiator, a pore-forming agent, and the like are added into a mixed solvent; the mixture is subjected to ultrasonic emulsification, such that a uniform and stable dispersion liquid is produced; the dispersion liquid is transferred into a reaction bottle, and is stirred; vacuum pumping is carried upon the reaction bottle, and nitrogen is filled into the reaction bottle until constant pressure is achieved; the reaction bottle is irradiated by using an ultraviolet lamp under room temperature for approximately 8 hours, and the reaction is then stopped; an obtained reaction liquid is subjected to centrifugal sedimentation, washing, and drying, such that the mono-disperse polymer functional microspheres with uniform particle sizes are obtained. The preparation method provided by the invention is advantaged in high production efficiency, and is energy-saving and environment-friendly. According to different requirements, thousands of specifications of mono-disperse microspheres with particle sizes of 5 nanometers to 1000 micrometers can be prepared. The method is widely applied in fields related to paints, adhesives, biomedicines, and electronic information.

The invention relates to a castor oil-based aqueous lubricant used for medical instruments and a preparation method of the Castor oil-based aqueous lubricant, and solves the problems in the prior art that the lubricants have poor biodegradability, cause severe pollution and can not be recycled. The invention adopts a technical scheme as follows: the castor oil-based aqueous lubricant used for medical instruments is composed of the following components: 5 to 20% of industrial-grade castor oil, 5 to 30% of an emulsifier system, 0.5 to 5% of co-emulsifiers, 0.05 to 1% of antifoaming agents and the balance of water. The preparation method comprises the following steps of: heating the emulsifier system and water up to 50 DEG C to 90 DEG C under stirring conditions to obtain an emulsifier water solution; mixing industrial-grade castor oil, co-emulsifiers and antifoaming agents with the emulsifier water solution; ultrasonically emulsifying; and cooling down to room temperature to obtain the final product. The lubricant has good stability and dilution stability and no toxicity, is suitable for both manual operation and operation using an automatic cleaning machine, and can well meet the lubrication requirements of medical instruments.

The invention relates to a chitosan oligosaccharide composite powder with adjuvant hpyerglycemic function. The chitosan oligosaccharide composite powder comprises, by weight, 40 to 60 parts of oat beta-glucan, 5 to 20 parts of chitosan oligosaccharide, 5 to 20 parts of sealwort extract, 3 to 8 parts of mulberry leaf extract, 2 to 6 parts of balsam pear extract, 0.05 to 0.5 part of chromium-rich yeast and 10 to 20 parts of a filler. The invention has the following advantages: the chitosan oligosaccharide composite powder is a chitosan oligosaccharide compound prepared from chitosan oligosaccharide and oat beta-glucan, used as main effective components, and a plurality of traditional Chinese medicinal active components, used as adjuvant materials, through refining in virtue of ultrasonic emulsification and spray drying technologies; the chitosan oligosaccharide composite powder has the advantages of good dissolvability, good dispersibility and high absorption and availability; all the components of the chitosan oligosaccharide composite powder cooperate with each other to exert substantial effect on promotion of blood glucose metabolism and maintenance and adjustment of the functions of the pancreas islet; moreover, a variety of active components included in the chitosan oligosaccharide composite powder has obvious synergism in improving the sensitivity of insulin and stabilizing postprandial blood sugar.

The invention discloses a preparation method of copper-free click crosslinking polysaccharide microspheres. The preparation method comprises the following steps that chitosan and 1-hydroxyl benzotriazole are dissolved in water at room temperature, and cyclooctyne-3-glycolic acid is dissolved in a tetrahydrofuran/water mixed solvent; after the two solutions are mixed, diisopropylethylamine is added, stirring reaction is performed, and cyclooctyne chitosan is obtained through dialysis and freeze-drying; sodium alginate and carbodiimide are dissolved in water, 11-azido-3,6,9-triethyl ether-1-amine is added, stirring reaction is performed, and azido sodium alginate is obtained through dialysis and freeze-drying; water solutions of the cyclooctyne chitosan and the azido sodium alginate are respectively prepared, after mixing according to the volume ratio, emulsifier Span-80 containing paraffin oil is added, and an emulsification emulsion is obtained through ultrasonic emulsification; the emulsification emulsion volatilizes and stays overnight and is poured into isopropanol for precipitation of microspheres, and the crosslinking polysaccharide microspheres are obtained through freeze-drying after cleaning. The process is simple, makes products safe and non-toxic and is suitable for the medical fields of drug release, gene therapy, tissue engineering and the like.

The invention discloses a femtosecond laser cataract surgery treatment device which comprises an optical coherence tomography scanning imaging system, a data processing system, a laser light source system, a laser energy detection system, a laser scanning system and a press mirror. The laser light source system is provided with a femtosecond laser. The laser light source system and the laser energy detection system, the laser energy detection system and the laser scanning system, the laser scanning system and the optical coherence tomography scanning imaging system are respectively connected through a light beam transmission system. The femtosecond laser cataract surgery treatment device has the advantages that the device is precise, efficient and safe, and astigmatism and endophthalmitis after operation are avoided; envelope tearing and suspensory ligament injury are reduced, surrounding tissue injuries are small; complications produced during crystal nucleus emulsification and artificial lens implantation are decreased as far as possible; the operating difficulty is reduced; the required energy for ultrasonic emulsification is greatly decreased, and the corneal endothelium is effectively protected.

The invention provides a method for transferring nano-particles from an oil phase into an aqueous phase. The method includes the steps of mixing nano-particle solution dispersed in the non-polar oil phase with water, a stabilizer and cosurfactant solution, enabling the mixture to be subjected to ultrasonic emulsification and made into oil-in-water microemulsion, carrying out evaporation and drying on the microemulsion in a baking oven to obtain stabilizer-nano-particle composite dry jelly, adding polar solvent capable of dissolving the stabilizer into the dry jelly, slightly shaking so as to enable the dry jelly to be dissolved and dispersed into the solvent, and finally achieving the purpose of dispersion of the nano-particles transferred from the non-polar oil phase to the polar solvent. The method is simple in process, simple, convenient and quick in operation, and capable of effectively transferring the nano-particles dispersed in the oil phase to the aqueous phase.

The invention discloses the online measuring the oil concentration of the sewage and its equipment. The method adopts the ultrasonic emulsification oil-water mixture and uses the optical nephelo method to test the oil concentration. The equipment comprises the measuring section vertically put on the sewage pipeline, the ultrasonic oscillator set at the input and the output ends of the measuring section; three pairs of white gem windows transmitting beams set at the outside pipe wall, and the windows arrange in 120 Deg angle mutually; three groups of photoelectric converters are set corresponding to the windows; connect the industrial controller with a displayer through the signal receiver and the amplifier. When the sewage flows through the test section, the ultrasonic oscillator emulsificates the sewage and mixes it evenly; the testing beam is the violet beam with fixed wavelength; the photoelectric converter converses the optical signal into the electric signal and the optical nephelometer calculates the oil concentration of the sewage.

Disclosed is a method to produce low-fat peanut butter from defatted peanut flour. The production method includes the following steps: baking: baking the defatted peanut flour in a tunneling-based microwave dryer for 100-400 seconds and then cooling through strong wind until reaching room temperature; aromatizing: adding aromatizing agent water solution into the baked peanut flour based on weight ratio of 2.2:1 and mixing to be even; seasoning: adding pure peanut oil into aromatized peanut butter based on weight ration of 3-10:100 and mixing to be even; emulsifying: bathing the peanut butter in water with temperature of 60-80 EDG C to enable the interior and the exterior of the peanut butter to be heated evenly, inserting the probe of an ultrasonic cell disruptor into the peanut butter and conducting emulsification treatment for 20-30 minutes per 50kg under the conditions of harmony indicator output of 50, dutyfactor of 60, temperature of 60-80 DEG C; cooling: speedily stirring the emulsified butter and cooling to 20-50 DEG C through air to avoid the accumulation of the heat of the butter, which leads to the precipitation of the fat; store maturity: putting the cooled peanut butter into a packing container and keeping still for 48h to make the butter totally steady and fixed.

The invention relates to a preparation method of a plant-source slow-release antibacterial aerogel. The preparation method comprises following steps: an eucalyptus wood bleached sulfate pulp is takenas a raw material to prepare microfibrillated cellulose MFC, and ultrasonic emulsification technology is adopted to prepare thyme essential oil nanometer emulsion; a MFC water suspension and the thymeessential oil nanometer emulsion are combined and mixed to be uniform at a certain ratio, and freeze-drying is carried out so as to obtain the essential oil/MFC aerogel. The MFC aerogel is high in porosity, ultra low in density, and excellent in adsorption performance, so that absorption of the high-efficiency essential oil with broad-spectrum antibacterial performance by the internal part of theaerogel is realized, essential long term continuous release is realized, the concentration can be maintained at a certain range in a long time period, the plant-source slow-release antibacterial aerogel can be used in refrigerated food antibacterial package, the preparation method is simple and convenient, is economical, and is friendly to the environment, and refrigerated food service life can be prolonged effectively.