155results about How to "Aid in diffusion" patented technology

The invention relates to an immobilized enzyme membrane reactor and the preparation thereof and a method for producing bio-diesel. The method comprises filling superfine fiber complex film in a die whose inside and outside are double cylindrical shape to form a film reactor, injecting activating agent solution and lipase solution in the film reactor in turn through adopting a cross-flow filtration mode, leading lipase to be chemically fixed on superfine fiber membrane surface, getting an enzyme membrane reactor which is fixed with lipase, respectively injecting mixed solution of animal and vegetable oil and carbinol in the inner side and the outer side of the superfine fiber complex film, doing catalytic alcoholysis reaction on fiber membrane surface, and producing bio-diesel. The enzyme gathering catalysis of the method of the invention is integral with a membrane separation process, and the method of the invention simplifies manufacturing technique, and meanwhile, the method of the invention overcomes inhabitation of lower alcohol to enzymatic activity in the process of catalyzing, the immobilized enzyme membrane reactor can be repeatedly used, which can achieve continuous production, improves production efficiency, and has excellent industrial application prospect.

The invention provides a preparation method for a lithium iron phosphate cathode material. The preparation method comprises: mixing ferric phosphate, a lithium source, a carbon source, a dispersant, a binder and water, and performing stirring, grinding and spray drying processing to obtain a lithium iron phosphate precursor, roasting the lithium iron phosphate precursor in a protective gas atmosphere, and cooling to obtain the lithium iron phosphate cathode material. During preparation of the lithium iron phosphate precursor, the dispersant and the binder are also added, so that the low viscosity of the slurry is improved when the solid content of the precursor slurry is improved. The method is capable of improving the preparation efficiency of the precursor, and also guaranteeing the performances of lithium iron phosphate.

The invention relates to a preparation method of hairtail polypeptide, including the following steps: (1) putting hairtail in water which is 1 to 3 times of the weight of the hairtail and wringing the hairtail and the water evenly into fish meat pulp; (2) putting the fish meat pulp in an enzymatic vessel, raising the temperature to 45 DEG C-65 DEG C and regulating the pH value to 5.5-8.5; in the weight of the hairtail, adding endoprotease of 1.0-3.0 percent and nisin which is 0.02-0.1 percent of the weight of the fish meat pulp weight at the same time; implementing the agitation hydrolysis on the mixed fish meat pulp for 16-24h; adding the endoprotease of 1.0-5.0 percent, regulating the temperature to 45 DEG C-60 DEG C, regulating the pH value to 5.0-8.0 and keeping on the agitation hydrolysis for 3-6h; (3) killing enzyme; (4) centrifuging to fetch supernatant; (5) decompressing, concentrating, vacuuming and drying the supernatant to obtain a hairtail polypeptide product. The molecular weight range of the hairtail polypeptide obtained through the method is kept within 250Da-6000Da; the content of the polypeptide, the molecular weight of which is smaller than 1000Da, is higher than 50 percent.

The invention belongs to the field of waste recycling. The invention provides a preparation method of a phosphorous removal adsorbent. The preparation method comprises the following steps: (1) puttingred mud in an acid solution for backflow so as to obtain red mud after acid activation; (2) soaking the red mud after acid activation into a surface active agent, oxidant or sodium carbonate solution, and carrying out modified treatment to obtain modified red mud; (3) mixing the modified red mud with a rare earth solution, adjusting pH value to be 8 to 10, and loading rare earth ions to obtain red mud loaded with rare earth; and (4) carrying out mixing granulation on the red mud loaded with rare earth, a pore forming material and a binder, and carrying out calcinations to obtain the phosphorous removal adsorbent. The removal rate of the phosphorous removal adsorbent prepared in the invention is more than 95% and can reach 100% at most, the adsorption capacity can reach more than 240 mg/g,phosphorous-containing waste water with the concentration of below 30 mg/L is treated, and the concentration of phosphorous can reach the first grade emission standard of pollution discharge standardin a municipal sewage treatment plant within one hour.

A metal-organic framework compound @ mesoporous material composite, a preparing method thereof and applications of the composite are provided. According to the composite, a metal-organic framework compound is distributed in pore passages of a mesoporous material, CO2 adsorbability of the metal-organic framework compound is fully utilized, a developed network pore passage structure of the mesoporous material also facilitates CO2 gas molecular diffusion, the metal-organic framework compound distributed in the pore passages can be in full contact with CO2 gas, and the mesoporous material can effectively delay decomposition and degeneration of the metal-organic framework compound in a flue gas environment and prolongs the service life time of an adsorption material, and therefore the composite can have excellent high-temperature resistance and water tolerance. The preparing method is simple in process, and suitable for large-scale production. The composite can be adopted as a CO2 adsorbent, is particularly used for adsorbing CO2 in flue gas, and can be used stably for long time in the flue gas environment.

The invention discloses a preparation method of different morphologies of cobalt monoxide nanometers loaded with foam nickel. The preparation method comprises: placing sheet-like foam nickel in an ultrasonic washing machine, washing, placing the washed foam nickel in a drying box, and drying; dispersing cobalt chloride hexahydrate powder into a dispersion solvent added with urea, and magneticallystirring at a room temperature to form a suspension; transferring the suspension to a high-pressure hydrothermal reaction kettle, obliquely placing the dried sheet-like foam nickel into the high-pressure hydrothermal reaction kettle, sealing the high-pressure hydrothermal reaction kettle, placing the high-pressure hydrothermal reaction kettle into the drying box, carrying out thermal insulation for 15-18 h at a temperature of 160-200 DEG C, and naturally cooling to a room temperature; taking the foam nickel out of the high-pressure hydrothermal reaction kettle, placing into the ultrasonic washing machine, washing, placing into a vacuum drying box, and drying to obtain a precursor; and calcining the precursor for 3-4 h at a calcination temperature of 400-520 DEG C.

A preparation method of a large-size and fine-grain molybdenum tantalum alloy sputtering target material comprises steps of cold isostatic pressing molding through combination of a steel mold with a rubber plate, sintering, levelling and reshaping, hot isostatic pressing treatment, rolling and machining. The grain size of the produced target material is smaller than 50 microns, the change of the grain size is maintained within 20%, and grains are evenly distributed in the plane direction and the thickness direction of the target material; the relative density of the target material is higher than 97%; besides, the large-size sputtering target material with the length being about 2 m and the width being about 1.3 m can be produced.

The invention relates to a coating method capable of improving wear resistance of a polyester harness cord. The method comprises the following steps: waterborne polyurethane size is taken as coating size, the pretreated polyester harness cord is impregnated in the coating size for padding, then drying and heat setting are performed, and the coated polyester harness cord is obtained; or the waterborne polyurethane size is taken as pre-applied primer size, another size is taken as the coating size, the pretreated polyester harness cord is impregnated in the pre-applied primer size for padding, and drying is performed; then the polyester harness cord is impregnated in the coating size for padding, drying and heat setting are performed, and the coated polyester harness cord is obtained. Selected waterborne polyurethane is safe, non-toxic and good in film forming property, the solubility parameter of waterborne polyurethane is close to that of polyester, and waterborne polyurethane has excellent adhesion and can effectively improve the adhesion effect between other coatings and polyester fibers; permeability of the polyester harness cord is good, coated property is good, and a uniform coating which is smooth, soft, not prone to yellowing and is resistant to wear, heat and light can be formed on the surface of the polyester harness cord.

The invention relates to the technical field of waste water processing, and discloses a composite microalgae biosorbent microsphere and a method for adsorbing chromium in waste water. The composite microalgae biosorbent microsphere comprises microalgae cells, magnetic Fe3O4 nanoparticles, corncob activated carbon and sodium alginate. A polymer of microalgae cells and the magnetic Fe3O4 nanoparticles is absorbed by corncob activated carbon, and then is subjected to mixed embedding and fixing with sodium alginate to prepare the composite microalgae biosorbent microsphere. The composite microalgae biosorbent microsphere has the advantages of large adsorption capacity, fast adsorption rate, and simple and convenient operation, and contains the magnetic Fe3O4 nanoparticles, and rapid recovery of the adsorbent can be conveniently realized after processing wastewater. The composite microalgae biosorbent microsphere is used for the adsorption and removal of heavy metal ion chromium in the wastewater, and the good removal effect is achieved.

The invention relates to a grease catalyzing and separating biphasic enzyme-membrane reactor and a method for preparing and using hydrolyzed edible glyceride. The method comprises the steps of filling polyphosphazene superfine fiber complex film into a mould with an inner and an outer cylinders to form a roll membrane device; sequentially injecting activating agent solution and lipase solution into the membrane device, and causing the lipase to be chemically fixed on the surface of the superfine fiber film to obtain an enzyme-membrane reactor; and injecting edible glyceride and phosphate buffer respectively into the inner side and the outer side of the superfine fiber film to conduct hydrolysis reaction on the surface of the superfine fiber surface. The reactor can be used for catalyzing the hydrolysis of the glyceride, and for producing diglyceride or monoglyceride edible oil and extracting functional lipid by treating lard or fish oil. The glyceride hydrolyzate accounts for more than 85%. The grease catalyzing and separating biphasic enzyme-membrane reactor is designed by combining efficient biocatalysis and complex film separation, and has the advantages of repeatable use, realized continuous efficient production, reduced cost, saved resource and good development prospect.

The invention relates to a modified lithium vanadate material and a modification method thereof, and application of the modified lithium vanadate material in lithium ion batteries. The modified lithium vanadate material is prepared by calcining a Li3VO4 sample at 300-800 DEG C under vacuum conditions for 1-10 hours. The method is simple and easy to implement, does not perform any control or coating on the shape and size of the Li3VO4, avoids the negative effects caused by introduction of the carbon material or other substances, and can easily implement industrial production. A lithium storage electrode prepared by using Li3VO4-delta as the active substance has the advantages of high electrochemical lithium storage reversible capacity and excellent cycle performance. Under the conditions of the current density of 200 mA g<-1> and the voltage of 0.2-3.0V, the first charge/discharge specific capacity of the Li3VO4-delta is up to 416/326 mAh g<-1>, the first coulomb efficiency is 78%, and the capacity is still 286 mAh g<-1> after 200 cycles.

The invention provides a preparation method of sodium titanium phosphate. The method comprises the following of: mixing a titanium source, a sodium source and a phosphorus source in certain proportionevenly; performing drying; conducting ball milling; heating the mixture obtained by ball milling in certain atmosphere for certain period of time; and conducting crushing to obtain the sodium titanium phosphate material. The sodium titanium phosphate material is a micro-nano material, and has primary particle NTP of 30-800nm and secondary particle NTP of 1-3 micrometers. The sodium titanium phosphate prepared by the method provided by the invention has good crystal shape and excellent processing performance, also the method is simple and the cost is low.

The invention discloses application of lycium barbarum polysaccharide in preparing a feed additive for reducing a ruminant rumen gas production rate. The fact that the lycium barbarum polysaccharide can be applied in preparing the feed additive for reducing the ruminant rumen gas production rate is discovered for the first time; 0.1 to 0.5 percent of lycium barbarum polysaccharide is added in a feed for ruminants, so that the output of greenhouse gases such as methane and carbon dioxide in rumens can be remarkably reduced, and the rumens are prevented from producing flatus; meanwhile, the degradation rates of dried matters and crude protein in the feed for the ruminants can be also improved, and the utilization rate of the feed is effectively improved.

The invention discloses a transistor vertical-cavity surface-emitting laser (T-VCSEL), and belongs to the technical field of an integrated photoelectronic device. The T-VCSEL comprises a buffer layer, a lower end face distributed Bragg reflector, a collector region, a base region, an emitter region and an upper end face distributed Bragg reflector which are successively arranged according to an epitaxial growth sequence. The T-VCSEL also comprises a collector, a base electrode and an emitter electrode which are connected with the collector region, the base region and the emitter region. A quantum well active region is arranged in the base region. The collector is arranged on the back of the buffer layer. The buffer layer and the lower end face distributed Bragg reflector are equipped with doping types same as the doping type of the collector region. According to the T-VCSEL, the length of the transmission path of carriers in the collector region is reduced from the existing tens of microns to several microns, and the carriers are imported from the emitter region; therefore, the bad influence of the voltage drop of an internal resistor on the control of the working state of the device can be effectively reduced; and moreover, the transverse distribution of the potential in the collector region is improved.

The invention relates to a luminescent diode (LED) and a manufacturing method thereof. The LED at least comprises the following processes: a conductive base plate is provided with a first surface relative with a second surface; a metal joint layer is arranged on the first surface of the conductive base plate; a metal reflecting layer is jointed with the metal joint layer; an N type semiconductor layer is arranged on the metal reflecting layer; an active layer is arranged on the N type semiconductor layer; a P type semiconductor layer is arranged on the active layer; a window layer is arranged on the P type semiconductor layer, wherein the thickness of the window layer is above 50Mum and the window layer is composed of transparent conductive material; a P type electrode is arranged on the window layer.

The invention discloses a park floor lamp capable of automatically dissipating heat and expelling insects. The lamp comprises a lamp shell and a lamp tube installed in the lamp shell, an installationgroove is formed in the lamp shell, the installation groove is located above the lamp tube, a light-transmitting plate is connected to the groove opening of the installation groove in a sealed mode, an equipment groove is formed in the light-transmitting plate, and a plurality of shading plates are symmetrically and rotationally installed in the equipment groove through a rotating shaft. The decomposition characteristic of the driving agent is utilized, when the lamp tube works, the heat dissipation fan can be autonomously driven to periodically rotate forwards and backwards, so that hot air in the shell is intermittently exhausted, and external cold air is sucked in, the flowing speed of gas in the shell and outside gas is increased, the heat dissipation effect is good, energy conservation and environmental protection are achieved, meanwhile, with forward rotation of the heat dissipation fan, the atomization spray head can spray stored insect expelling liquid to the ventilation groove, insects can be prevented from being gathered in the ventilation groove, and normal use of the heat dissipation opening is guaranteed.

The invention discloses a solid acid catalyst and a preparation method and application thereof in esterification transesterification. The preparation method of the solid acid catalyst comprises the following steps of carrying out a liquid phase deposition reaction on a graphene oxide suspension dissolved with an aluminum salt to obtain aluminum oxide modified graphene oxide, and carrying out a mixed reaction on the aluminum oxide modified graphene oxide and concentrated sulfuric acid to obtain the solid acid catalyst. The preparation method is simple to operate, the method has the advantages of simple operation, mild conditions, very good catalysis effect on esterification and transesterification of the kitchen waste oil, realization of the fatty acid methyl ester yield higher than 90%, easy separation of the solid acid catalyst from the product, cyclic utilization after simple treatment, no pollution, and substantial reduction of the production cost of biodiesel prepared from the kitchen waste oil.

The invention provides a method for realizing TiAl-based alloy connection by adopting an Al foil as an intermediate layer and relates to a TiAl-based alloy connection method. The method solves the problems that the existing TiAl alloy joint obtained through soldering has low high-temperature strength, and impurity elements which do not exist in TiAl alloy base materials are led in the connection process to cause that the corrosion resistance, the oxidation resistance and other properties of the joint are deteriorative. The method comprises the following steps: firstly, machining TiAl-based alloy into the required dimension; secondly, polishing after TiAl-based alloy connection surfaces are polished by sand paper and placing into acetone for ultrasonic cleaning; thirdly, placing the Al foil among the connection surfaces, applying the pressure, placing into a vacuum heating furnace for welding, heating and heat preservation and cooling to the room temperature, namely finishing the TiAl-based alloy connection. A welded joint or a joint of the TiAl-based alloy connected by the method can be used at the high temperature of 600-800 DEG C so as to avoid the leading-in of other impurities in the welding process. The method is applied to the technical field of TiAl-based alloy connection.

The invention discloses a CoO/rGO composite and a preparation method and application thereof, the CoO/rGO composite is formed by randomly distributing CoO nanorods in the shape of sugar coated haws ona stick on the surface of graphene, the CoO nanorods are composed of CoO nanoparticles, and a gap is arranged between adjacent CoO nanoparticles. The CoO/rGO composite is a double-effect catalyst fora lithium air battery. The CoO/rGO composite has good catalytic activity for both ORR and OER, and has very high battery capacity. The CoO/rGO composite has simple process, environmental friendliness, low cost and high efficiency and other characteristics.

The invention provides a water-soluble cyclodextrin derivative clathrate of fluorouracil, and an in-situ gel film agent containing the clathrate and having biological adhesion and a preparation method thereof. According to the invention, cyclodextrin derivative-hydroxypropyl-beta-cyclodextrin is used to include fluorouracil hardly soluble in water so as to allow the solubility of fluorouracil in water to be improved and fluorouracil to have a slow release effect, so the in-situ gel film agent is prepared; the in-situ gel film agent is a novel cavity drug delivery preparation and comprises the hydroxypropyl-beta-cyclodextrin clathrate of fluorouracil, a temperature-sensitive gel skeletal material and a biologically adhesive material. The preparation is a freely flowable solution before usage, rapidly forms a gel film on the surface of a cavity, has a great drug release area, good biological compatibility and good gel strength and biological adhesion, is capable of firmly adhering on the mucous membrane of the cavity, prolongs action time, realizes uniform drug distribution, is beneficial for absorption of the drug and diffusion of the drug to peripheral tissue and improves bioavailability and treatment effects of the drug.