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 relates to a novel biological scaffold material for bone repair and a preparation method thereof. PLGA and PLA with a mass ratio of 1: 1-10: 1 are dissolved into chloroform, dimethyl sulfoxide, 1, 4-dioxane or a mixed liquid of the 1, 4-dioxane and ultrapure water, and then pearl powder which is subjected to partial or complete deproteinization treatment is added into the obtained product according to the proportion of the PLGA / a PLA mixture to the pearl powder (mass ratio) is 1: 1-10: 1 to obtain forming slurry. A three-dimensional scaffold with high porosity and connectivity rate is designed through a 3D software, and then a low-temperature rapid forming system is utilized to ensure that the three-dimensional scaffold is formed to obtain a scaffold with a microporous structure. An artificial bone biological scaffold material prepared by the method has a three-dimensional scaffold structure that a macroscopic structure has aperture channels with diameters of between 100 and 500mu m and a microstructure has micropores with diameters of between 10 and 20mu m, wherein micron pearl powder is dispersedly distributed on walls of the micropores. The porosity is between 60 and 90 percent, and a macroporous structure is perforated in three directions of X axis, Y axis and Z axis, and has 100 percent of connectivity.

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.

The invention relates to a multi-metal non-supported hydrofining catalyst and a preparation method thereof. The hydrofining catalyst is composed of at least one +3 valent metal oxide, at least one VIII group metal oxide, at least one IVB group metal oxide and two VIB group metal oxides, wherein based on metal oxide, the catalyst contains 10-50 wt% of VIII group metal, 1-30 wt% of IVB group metal,1-50 wt% of + 3 valent metal and 5-80 wt% of two VIB group metals. According to the invention, the catalyst can remove sulfur and nitrogen in model diesel oil to less than 10 ppm under the conditionsthat the temperature is 280-440 DEG C, the hydrogen pressure is 1-20 MPa, the volume ratio of hydrogen to diesel oil fraction is 50-1000 V / V, and the volume space velocity of the diesel oil fraction is 0.1-10 h<-1>.

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 belongs to the field of novel nano materials, and specifically relates to a FeS-NiS nano sheet array oxygen evolution catalyst and a preparation method thereof. The catalyst is obtainedby loading a FeS-NiS nano sheet array on the surface of a titanium mesh (TM) substrate. The preparation method comprises following steps: preparing a NiFe-LDH precursor: preparing a mixed solution from Ni(NO3)2.6H2O, Fe(NO3)3.9H2O, urea, and NH4F, putting a titanium mesh into the mixed solution, carrying out hydrothermal reactions to obtain the NiFe-LDH precursor; adding prepared NiFe-LDH precursor into a Na2S solution, and carrying out hydrothermal sulfurization reactions to obtain the catalyst. The prepared catalyst has an excellent electrocatalytic performance under an alkaline condition, is durable, and is a novel, stable and efficient oxygen evolution catalyst.

The invention discloses a MAX phase / nitride ceramic laminated gradient composite material as well as a rapid preparation method and application thereof, belonging to the technical field of preparationof ceramic matrix composite materials. The method adopts an SPS sintering technology to prepare the MAX phase / nitride ceramic laminated gradient composite material; the method introduces an electricfield on the basis of a temperature field and a pressure field, thus playing a role in plasma activation of raw materials, and further quickly preparing the dense multiphase ceramic material under theconditions of lower sintering temperature and shorter heat preservation time; furthermore, the activation of plasma also contributes to the diffusion of atoms, so that the interlayer bonding of a MAXphase and nitride is promoted, and the high-performance connection between the MAX phase and the nitride is realized; the method has the advantages of being high in heating rate, low in sintering temperature and short in heat preservation time. The method can be used for quickly preparing the MAX phase / nitrogen ceramic laminated gradient composite material with high density, low impurity contentand good interface bonding property.

The invention relates to a single-layer colloidal crystal (MCC) steam sensor with a surface wrapped by an ultrathin metal organic framework material, a preparation method and application. The sensor is an MCC with the surface wrapped by a metal organic framework compound (MOF) particle layer. The preparation steps include (1), polystyrene microsphere synthesis, (2), MCC preparation and (3), ZIF-8 particle layer building on the surface of the MCC. According to the MCC steam sensor, the advantages of an ultrathin MOF film are highlighted, and the sensing performance is improved through the effective mass transfer process and optical signal conversion. An improved in-situ growth method is adopted for building the ultrathin MOF film, a crystal boundary and pores are introduced, due to ultrathin thickness, analyte can quickly diffuse and be adsorbed into the pores, and the sensing precision and reliability are improved.

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 discloses an aluminum element doped NCM622 type high-nickel ternary material and a preparation method thereof. The preparation method includes the following steps: (1) according to the estimated doping amount of Al element, weighing Al(OH)3, an Ni0.6Co0.2Mn0.2(OH)2 precursor and Li2CO3 with a stoichiometric ratio, and mixing fully and evenly; and (2) placing the mixture into a tubular furnace, calcining for several hours in an air or oxygen atmosphere at a certain temperature, and grinding and sieving the obtained product to obtain the material. By adopting the preparation methodprovided by the invention, doping modification is carried out on a high-nickel ternary positive electrode material, so that the structural stability of the high-nickel ternary material can be effectively improved, and the rate capability and cycling performance of the material can be improved; the process flow is simple; and the prepared lithium-ion battery ternary positive electrode material also has uniform particle size distribution, clear particle boundaries, good secondary particle spherical structure and good rate capability and cycling stability.

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 a modified HZSM-5 molecular sieve catalyst. The method includes the following steps that firstly, a nano aggregate HZSM-5 molecular sieve, pseudo-boehmite, nitric acid, water, methyl cellulose, polyethylene glycol and tween are evenly mixed in the mass ratio of 1:(0.1-0.5):(0.02-0.08):(0.2-0.8):(0.005-0.05):(0.002-0.008):(0.002-0.008), extruded and formed, drying, bar breaking and calcination are conducted, and a catalyst precursor is obtained; secondly, the catalyst precursor is soaked in a mixed solution containing a proper amount of magnesium nitrate and zinc nitrate or a mixed solution containing calcium nitrate and zinc nitrate, dried and calcinated to obtain the modified HZSM-5 molecular sieve catalyst, wherein the massic volume ratio of the catalyst precursor to the mixed solution is 100:(1-5) (g / L). When a catalyst in the method is applied in a reaction for preparing gasoline with methyl alcohol as the raw material or methyl alcohol and naphtha as mixed raw materials, the methyl alcohol conversion rate and the oil product yield can be increased, the content of durene is remarkably reduced, and the octane number of the gasoline is increased. Methyl alcohol and naphtha serve as the raw materials to synthesize the gasoline, the heat exchange process is optimized, and the octane number of naphtha and the gasoline yield are increased.

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 preparation method of a heterojunction CoO / CoS porous nanorod, an obtained material and application of the heterojunction CoO / CoS porous nanorod. The method comprises steps: synthesizing cobalt-citrulline nanorods by taking a cobalt salt as a metal source and L-citrulline as a coordination agent through hydrothermal reaction; calcining and oxidizing the nanorods; and finally, vulcanizing through a vapor deposition method to obtain the loose and porous heterojunction CoO / CoS porous nanorod with a rough surface. The heterojunction CoO / CoS porous nanorod catalyst prepared by the invention shows relatively high catalytic activity and stability on electrochemical reaction (OER) of oxygen, is a high-stability anode oxygen evolution catalyst which can be well applied to water electrolysis, and has a wide application prospect in the future energy industry.

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 provides artificial tear compositions, artificial tear-gel compositions, contact lens storage compositions, contact lens treatment compositions, ophthalmological drug vehicle compositions and topical drug vehicle compositions comprising one or more nonionic surfactants with one or more non-Newtonian viscosity enhancing excipients and one or more of a polyol and or an electrolyte andmethods of their use.

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 discloses an electromagnetic assisted laser synchronous cladding device and method for remanufacturing metal parts. The electromagnetic assisted laser synchronous cladding device comprises a six-degree-of-freedom actuator, a laser, an electromagnetic induction heater, a powder spraying device and a workbench, wherein the working table is used for containing a workpiece to be machined, and the powder spraying device is used for spraying metal powder to the surface of the workpiece to be machined; the laser is installed at the tail end of the six-degree-of-freedom actuator, and thelaser is used for generating high-energy lasers for achieving cladding of the metal powder on the surface of the workpiece arranged on the workbench; the electromagnetic induction heater comprises aninduction coil and an induction power supply for supplying power to the induction coil, and the induction coil is made of a hollow metal tube; and cooling water is fed into the hollow metal tube forcooling, and the induction coil is arranged below the laser device and used for carrying out auxiliary cladding on the metal powder on the surface of the workpiece to generate an eddy current. According to the electromagnetic assisted laser synchronous cladding device, the structure is simple, the cladding speed is high, the powder utilization rate is high, and the applicable cladding material range is wide.

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.