73results about How to "Prolong the freezing time" patented technology

The invention provides a preparation method of a convenient fruit crisp. The method comprises the following steps: pre-processing fruits, smashing and pulping the pre-processed fruits, adding inulin, natural fructose syrup, white granulated sugar and natural lemon juice into the prepared fruit pulp for mixing, then, performing homogenization treatment to obtain mixed materials, finally, pouring the mixed materials into a mould pallet, and performing vacuum freeze-drying, so as to obtain the convenient fruit crisp. According to the invention, after being made into fruit pulp and added with other raw material specific components, fruits are made into the novel fruit crisp food convenient to eat through the vacuum freeze-drying method for the first time, so that the varieties of fruit products in the market are enriched; the fruit crisp prepared by the preparation method has the advantages that nutritional ingredients in fruits are prevented from losing furthest, the color and taste are not damaged, and the problem that the flavor of the fruit product is changed due to the adoption of the conventional preparation technology is solved; besides, the fruit crisp prepared by the preparation method is low in content, light in weight, easy for storage, and convenient to transport and carry.

The invention provides a carboxymethyl curdlan gum physical hydrogel and a preparation method thereof, belonging to the technical field of high polymer material; the mass percent of the carboxymethyl curdlan gum physical hydrogel is 3-20% while the balance is water. The preparation method comprises the following steps: preparing carboxymethyl curdlan gum aqueous solution; regulating pH value and performing freeze-thaw treatment; compared with the prior art, the invention adopts the freeze-thaw treatment to prepare carboxymethyl curdlan gum physical hydrogel; the preparation method is easy and convenient and the strength of the hydrogel can be enhanced through increasing freeze-thaw circling times, reducing freeze temperature, prolonging freeze time and the like; no chemical cross-linking agent or organic solvent with poison and side effect to organism is introduced in the hydrogel preparation process with freeze-thaw treatment. The carboxymethyl curdlan gum has immunity activity and anti-tumor activity, so the physical hydrogel has potential application in biomedical sciences, such as being taken as sustained and control drug carrier, and has more advantages compared with other hydrophilic gums.

The invention discloses a large ovarian tissue vitrification freezing carrier. The carrier consists of a carrier inner core and an outer sleeve, wherein the carrier inner core is in threaded connection with the outer sleeve, maintaining high airtightness and preventing cross infection of the ovarian tissue; meanwhile, the user operation is also facilitated; the carrier inner core consists of a handheld part, a cap part, a support part and a bearing part sequentially from top to bottom; the bearing part is clamped and fixed by the support part; when in use, a large ovarian tissue is put on an end part of the bearing part, away from the support part; the end part is a large ovarian tissue loading area; experiments prove that by using the carrier disclosed by the invention, the permeation efficiency of a refrigerant is improved; moreover, the operation is simple, the price is low, batch storage of large ovarian tissues is convenient, and the carrier is suitable for promotion and application.

The invention discloses a nano-composite superhydrophobic icing-proof coating material. The nano-composite superhydrophobic icing-proof coating material comprises the following components in percentage by mass: 5-50% of fluorine-containing acrylate copolymer-modified inorganic nanoparticles and 50-95% of an organic solvent. A preparation method for the nano-composite superhydrophobic icing-proof coating material comprises the following steps: uniformly mixing nano-SiO2, methylbenzene and 3-aminopropyl triethoxysilane, and performing refluxing reaction in an oil bath to obtain amino-modified SiO2-NH2 inorganic nanoparticles; uniformly mixing the SiO2-NH2, dichloromethane, triethylamine and 2-bromoisobutyryl bromide, and reacting in an ice-water bath to obtain 2-bromoisobutyryl bromide-grafted nanoparticle SiO2-NH-Br; uniformly mixing the SiO2-NH-Br, an acrylate monomer, fluorine-containing acrylate, CuX, methylbenzene and a ligand, deoxidizing, precipitating, performing centrifugal separation, and dissolving a product into the organic solvent to obtain the nano-composite superhydrophobic icing-proof coating material. The nano-composite superhydrophobic icing-proof coating material has excellent performance, lasting low surface energy and superhydrophobicity, and good icing-proof performance and has the effect of prolonging the icing time, and can be widely used for prevention and control of icing on the surfaces of communication lines, fan blades, airport facilities, airplane wings and the like.

A method and equipment for improving quality of vegetable oil through continuous crystallization, crystal growing, and dewaxing refining are disclosed. Oil and grease dewaxing is performed through eight-stage staged cooling crystallization, six-stage constant-temperature crystal growing, and two-stage low-temperature filtration. Special crystallization and crystal growing devices are adopted, interferences of transmission on crystallization and crystal growing processes are effectively solved as a whole, the heat conduction efficiency is higher, crystal damage caused by a transmission device and relative movement in an oil and grease system is less, energy consumption is lower, crystal dispersibility is significantly improved, and aggregation effects of wax, esters and high-melting-point fat are better. The method and the equipment can further improve dewaxing, winterization and dewaxing effects in crystallization and crystal growing processes of wax-containing vegetable oil, prolong oil product refrigeration time to 60 h or above, improve flavor and quality of oil and make oil palatability good. The method and the equipment are suitable for corn oil, sunflower seed oil, soybean oil, rice bran oil, and the like, and are particularly suitable for corn oil, sunflower seed oil, and the like.

The invention provides a production method of instant fruit and vegetable shortcakes. The method comprises the following steps: pre-processing vegetable and fruits, respectively crushing and pulping, mixing the above obtained fruit pulp with the above obtained vegetable pulp, adding inulin, natural fructose syrup, white granulated sugar and a natural lemon juice, blending, homogenizing to obtain a mixture, pouring the mixture into a die supporting box, and carrying out vacuum freeze drying to obtain the instant fruit and vegetable shortcakes. The fruit and vegetable pulps and other raw materials are mixed according to a specific ratio and undergo vacuum freeze drying to make the fruits and vegetables form a novel and instant fruit and vegetable shortcake food, so the kind of the fruit and vegetable products in the market is enriched. The fruit and vegetable shortcakes made through the production method maximally reserve nutritional components in the fruits and vegetables without loss of the nutritional components or destroys of the color or the taste, and solve the problem of flavor change of the fruit and vegetable fruits, induced by present production technologies; and the fruit and vegetable shortcakes produced through the method also have the advantages of low water content, light weight, easy storage, and convenient transportation and carrying.

The invention discloses a plant root freezing slice manufacturing method for synchronous radiation X-ray fluorescence microanalysis. According to the method, a sample is pretreated, an OTC (optical coherence tomography) freezing embedding agent is improved, the sample is soaked by the improved OTC freezing embedding agent, polyvinyl alcohol, polyethylene glycol and polyvinylpyrrolidone are mixed according to a certain proportion to form the improved OTC freezing embedding agent, the temperature of a slice knife edge is controlled, a user observes whether hardness and softness degrees of the sample and the improved OTC freezing embedding agent are consistent in trimming or not, and the success rate of a fresh plant root slice can reach 100% by prolonging freezing time and suitably improvingtemperature. According to the method, a fresh plant root tissue freezing slice with an integrated structure can be acquired, and a strong technical support is provided for development of synchronousradiation X-ray fluorescence microanalysis of fresh plant root tissues, research of absorption and accumulation micro-zonal distribution of heavy metals, nutrient elements and microelements in plantsand the influence of the heavy metals on physiological ecology of the plants.

The invention discloses a quick-freezing fresh-keeping method and a tunnel-type fresh-keeping quick-freezing machine. The tunnel-type fresh-keeping quick-freezing machine comprises a fixing frame, a transmission roller shaft and a storehouse body, wherein the storehouse body is provided with a transmission mesh belt; the storehouse body is arranged on the fixing frame; a fresh-locking chamber anda freezing chamber are arranged in the storehouse body; the fresh-locking chamber and the freezing chamber are mutually connected; a liquid nitrogen spraying device is arranged in the fresh-locking chamber; a plurality of atomizing spray heads are arranged on the liquid nitrogen spraying device; an air cooling device is arranged in the freezing chamber; the storehouse body is provided with a regulating and controlling system electrically connected with the liquid nitrogen spraying device and the air cooling device; and the two ends of the storehouse body are provided with a feeding port and adischarging port. According to the quick-freezing fresh-keeping method and the tunnel-type fresh-keeping quick-freezing machine, the mechanical compression refrigeration and the liquid nitrogen refrigeration are effectively combined, a frost protection layer is formed on the surface of material by spraying liquid nitrogen to protect the moisture of the material from losing so as to ensure the freshness of the material, and then a mechanical compression refrigeration is adopted to carry out deep refrigeration so as to avoid dehydration of the surface of the material due to direct air cooling soas to ensure the freshness and taste of the material; and meanwhile, the fresh-locking and fresh-keeping effect are achieved, full-automatic operation is achieved according to set parameters, and energy consumption is reduced.

The invention relates to a pseudo-ginseng vacuum freeze-drying method and application thereof, and relates to the technical field of traditional Chinese medicine processing. According to the vacuum freeze-drying method, pseudo-ginseng homogenate is subjected to pre-freezing and vacuum drying treatment, in the pre-freezing step, pre-freezing is carried out in stages at the temperature of minus 20-minus 75 DEG C, and in the vacuum drying treatment step, vacuum drying is carried out at the temperature of minus 20-30 DEG C. The vacuum freeze-drying method is applied to preparation of pseudo-ginseng processed products, and the obtained pseudo-ginseng processed products are high in cleanliness, fine and smooth in taste, stable in quality, accurate in dosage, convenient to apply and carry, high in dissolution and absorption speed, higher in product standardization, higher in production efficiency and suitable for daily life of normal people.

The invention relates to a nano-material and a method for preparing a coating, particularly a method for preparing a titanium dioxide composite coating mainly by a hydrothermal method and a sol-gel method so as to form a superhydrophobic film. The superhydrophobic film prepared has the characteristics of a large static water contact angle, a small rolling angle and a wide application matrix range,the static water contact angle on a glass substrate can reach 162 degrees, and the rolling angle is less than 1 degree. This coating has a self-cleaning effect like a lotus leaf structure, and in addition, the film can provide good anti-icing and anti-corrosion effects.

The invention belongs to the technical field of anti-ice-coating materials, and discloses a flexible flexional active-deicing super-hydrophobic anti-ice-coating composite material and a preparation method and application thereof. The anti-ice-coating composite material is prepared from a room-temperature vulcanized liquid silicone rubber matrix and a micro-nano material; the room-temperature vulcanized liquid silicone rubber matrix is prepared from room-temperature vulcanized liquid silicone rubber, an organic solvent, a curing agent and a catalyst, and the micro-nano material is composed of an inorganic micro powder, carbon nanotubes, a polar organic solvent and a water repellent agent; the anti-ice-coating composite material is in the organic solvent, the room-temperature vulcanized liquid silicone rubber is semi-cured under the effect of the catalyst and one part of the curing agent, and a semi-cured silicone rubber matrix is obtained; then the micro-nano material is mixed evenly with the remaining curing agent, and the mixture is sprayed on the surface of the semi-cured silicone rubber matrix and dried to obtain the anti-ice-coating composite material. The anti-ice-coating composite material is flexional, photothermal active deicing is combined with superhydrophobic ice coating prevention, the anti-ice-coating effect is significant, and the material is used in the anti-ice-coating field.

The invention provides a dental pulp stem cell collecting kit. The dental pulp stem cell collecting kit comprises a box body and a box cover connected with the box body via hinge joint; the box body is composed of a first box body and a second box body; the first box body is divided into a plurality of reagent bottle grooves by separating plates; reagent bottles are placed in the reagent bottle grooves; the second box body is divided into a plurality of storage tanks; and a teeth fixing device, a nerve broach, a scalpel, and a cell filter screen are stored in the storage tanks respectively. The dental pulp stem cell collecting kit can be used for processing of detached teeth conveniently; a culture liquid provided by the dental pulp stem cell collecting kit is capable of increasing amplification times of dental pulp stem cells obviously; a provided stem cell preservation liquid is capable of realizing long term preservation of dental pulp stem cells; and after recovery, the preserved stem cells are still high in activity.

The invention relates to the technical field of material surface engineering, in particular to a super-hydrophobic anti-fouling anti-icing water-based paint which comprises the following components in parts by weight: 10-15 parts of fluoride-grafted nano silicon dioxide on the surface, 40-60 parts of perfluorodecyltrimethoxysilane, 10-20 parts of carbon microspheres, 5-8 parts of modified graphene, 30-40 parts of binder and 100-150 parts of solvent. According to the super-hydrophobic anti-fouling anti-icing water-based paint, the super-hydrophobic material and the near-infrared photothermal material are added, so that the super-hydrophobic anti-fouling anti-icing water-based paint has the dual effects of super-hydrophobicity and photothermal deicing, and the near-infrared photothermal material is modified graphene which is a compound of graphene and CdS; and the super-hydrophobic material is very beneficial to formation of a rough micro-nano structure on the surface of the coating, so that the coating can obtain a larger static contact angle and a smaller rolling angle, the icing time of water drops on the surface of the coating is further prolonged, and a better anti-icing effect is achieved.

The invention discloses an adhesive self-resistance heating / super-hydrophobic integrated gradient thin film material. The thin film material is made of adhesive resin, insulating resin, thermally andelectrically conductive filler and thermally conductive and insulating filler, wherein the adhesive resin and the insulating resin separately form a bonding layer and a substrate which are bonded together; and the thermally and electrically conductive filler and the thermally conductive and insulating filler are added to a middle layer and an upper layer of the substrate correspondingly to dividethe substrate into three gradient regions from top to bottom, wherein the surface of the uppermost region is constructed with a super-hydrophobic structure. The adhesive self-resistance heating / super-hydrophobic integrated gradient thin film material has the beneficial effects that (1) only the insulating resin is used in a main part, the functionalization of different regions is realized while ensuring that the interface influence between layers of different materials does not exist in a structure, mechanical properties are significantly improved, and stratification is not prone to occurring;and (2) anti-icing and de-icing are integrated into one, the icing time can be effectively delayed, low-energy electric heating de-icing can be achieved, and the energy utilization efficiency of aircrafts can be ultimately improved.

The invention provides a preparation method for an abrasion-resistant super-hydrophobic coating. The preparation method comprises the following steps that acrylates copolymer and BYK-333 are mixed jointly and stirred uniformly, then a blended solution of ethyl acetate and butyl acetate is added, and adipic acid / neopentyl glycol / trimellitic anhydride copolymer, acetyl tributyl citrate, and epoxy resin are sequentially added after stirring is carried out for a moment, nitrocellulose is added to obtain a solution A; and an aluminum sheet is placed on a spin coater, a nano silicon dioxide particlesolution is immediately coated in a spinning mode after spin coating is completed, and then drying is carried out to obtain the abrasion-resistant super-hydrophobic coating. Hydrophobic modified silicon dioxide insets in the surface or an inner hole of PMMA, so that a white abrasion-resistant coating with a static WCA of 168 degrees + / -0.9 degrees and a rolling angle of less than 1 degree is obtained. The abrasion-resistant super-hydrophobic coating has the advantages of good self-cleaning effect, anti-icing and acid-alkali-resistant properties and capable of being applied to different substrates, and the above advantages provides a certain reference value for the industrial market requirement that super-hydrophobic materials has a certain mechanical stability and environmental adaptability.

The invention discloses an anti-icing insulator coating and a preparation method thereof, and relates to the technical field of coatings. The coating comprises, by weight, 20-32 parts of fluorosilicone modified acrylic resin, 30-46 parts of modified silicone resin, 6-14 parts of a modified polyperfluorinated ethylene propylene emulsion, 3-7 parts of modified nano-silica, 2-6 parts of hexamethyldisilazane, 1-5 parts of a modified composite filler, 10-20 parts of n-butyl acetate and 10-30 parts of propylene glycol methyl ether acetate. The coating has the advantages of obvious delayed icing effect, great reduction of the icing amount, easiness in deicing, reduction of the influence of ice and snow weather on power equipment, facilitation of improvement of the operation reliability of a powertransmission line and prolongation of the normal operation period.

The invention discloses an integrated forming method of a polymer material with a covering ice preventing function. By designing the mold surface structure and adjusting the forming hot-pressing parameters of a composite material, integrated forming of a covering ice preventing function structure and a polymer-based material is achieved. The polymer material with the covering ice preventing function and the integrated forming method thereof have the following advantages that the two functions of preparation of the polymer-based material and integration of the covering ice preventing micro-structure on the material are finished at the same time; compared with the traditional technology, operation is simple, the structure forming property is good, and the micro-structure distribution is uniform; the prepared polymer material has the surface with the super-hydrophobicity to the liquid-state water, the freezing time of supercooling liquid drops is prolonged remarkably, and thus the supercooling liquid drops have enough time to leave the surface; and the ice adhesion strength is extremely low, the covering ice can be separated from the material surface under the action of natural wind force or gravity, and the polymer material can be used for covering parts, which are exposed in the extreme environment, on the outer surface of machine equipment and has the important practical significance to the ice preventing and removing technological development of a wind power machine and an airplane.

The invention discloses a determining system for original granularity of a sintering mixture. The determining system comprises a cooling device, a detecting and sample sending device, a screening device and a microscope, wherein a discharging port of the cooling device communicates with a feeding port of the detecting and sample sending device, and the detecting and sample sending device is located between the cooling device and the screening device; the sintering mixture passes through the cooling device, the detecting and sample sending device and the screening device sequentially and is fed to the microscope for detection and observation. Compared with the prior art, the determining system has the advantages that the obtained mixture is not required to be classified during freezing of the sintering mixture, the granularity of the mixture is stable, manual stirring operation is not needed, and continuous feeding and recycling of a condensate can be realized; continuous and automatic sampling and feeding of mixture particles with different particle diameters are realized in a screening process, the stability, uniformity and reliability of sampling are improved, human unstable factors during sending are avoided, the labor intensity is reduced, the analysis and detection accuracy is improved, and the sample accuracy is effectively improved.

The invention provides an anti-icing and de-icing composite material with an electric heating / super-hydrophobic function and a preparation method of the anti-icing and de-icing composite material. The composite material comprises a super-hydrophobic layer (1), an electric heating grid layer (2) and a base layer (3) from top to bottom in sequence; the electric heating grid layer (2) is a mesh metal template with a micropore array; the electric heating grid layer (2) is coated in the base layer (3); and the base layer (3) is formed by a polymer mixture. The invention also relates to a preparation method of the composite material. Compared with traditional single active deicing or passive anti-icing, passive anti-icing and active anti-icing are combined, ice attached to the surface of the composite material can be rapidly removed, and the problem of high energy consumption caused by single electric heating deicing is solved. The anti-icing and de-icing composite material prepared by the method is higher in anti-icing and de-icing efficiency, can be used for covering parts on the outer surfaces of various machinery equipment in various service environments, and is of great significance to the development of an efficient anti-icing and de-icing technology.

The invention belongs to the technical field of surface working and coatings, and particularly relates to a hydrogel coating and a production method and application thereof. According to the hydrogelcoating, different polyelectrolytes are adopted for being coated onto a surface of a base material alternatively in a layer-by-layer assembly mode, and through chemical cross-linking, a polyelectrolyte network structure is produced, so that the purposes of reducing freezing temperature and prolonging freezing time are achieved. The produced coating has the characters that the production technologyis simple, the application range is wide, large-area construction is easy, the coating is environmentally friendly, and has excellent anti-icing and anti-frost effects, and the like.

The invention discloses an aluminum alloy surface thin ice coating layer and a preparation method thereof. The coating layer consists of the following components: nickel hydroxide, oxidized graphene and palmitic acid, wherein nickel hydroxide is of a nanosphere structure; oxidized graphene is uniformly embedded among nickel hydroxide nanospheres in a piece form to form a micro-nano composite structure; and palmitic acid covers the surface of the micro-nano composite structure. The coating layer is excellent in thin ice effect, can prominently reduce the surface shearing strength of ice, and prolongs the icing time; and the preparation method is simple and convenient, low in cost and excellent in application value.

The invention relates to the technical field of food machinery, and in particular relates to a method for automatically producing shoe-shaped gold ingot-like wontons. The method includes molding, quick freezing, tidying, coating, boxing, sealing and other steps. Shoe-shaped gold ingot-like wontons are formed by a molding die, the formed shoe-shaped gold ingot-like wontons are in order conveyed toa loading machine, a quick freezing chamber, a first material tidying device, a coating machine, a second material tidying device, a boxing machine and a sealing machine which are connected. The process from manufacturing, freezing to packaging of the shoe-shaped gold ingot-like wontons is completely automatic. The entire production line is integrated, no manual operation is required, the production efficiency of the shoe-shaped gold ingot-like wontons is greatly improved, the method is applicable to the mass production of the shoe-shaped gold ingot-like wontons, and the shoe-shaped gold ingot-like wontons which are industrially prepared in a large scale are very consistent in size and shape.

The invention provides a seafood packaging box. The seafood packaging box comprises a box body, a box cover, a separation plate, a water pipe and an edge strip, wherein the box body is a groove-shaped shell with an upper opening and the upper opening is connected with the box cover; the transverse separation plate is arranged in the box body; the distance between the separation plate and a bottom plate of the box body is smaller than the distance between the separation plate and the opening of the box body; the upper end face of the separation plate is machined into a hollow surface; the separation plate is provided with a through hole, namely a water seepage hole; the water pipe is arranged on the side surface of the box body; one end of the water pipe is arranged at the outer part of the box body; and the other end of the water pipe is correspondingly arranged in a cavity between the separation plate and the bottom plate of the box body. The seafood packaging box has the advantages of convenience for transportation, safety and sanitation, good fresh-keeping effect and the like.

The invention provides a preparation method of convenient vegetable crisps. The method comprises the following steps: pretreating vegetables, crushing the pretreated vegetables, pulping the crushed vegetables, adding inulin, table salt and white sugar to the obtained vegetable pulp, concocting the vegetable pulp, the inulin, the table salt and the white sugar, and then performing homogenizing treatment so as to obtain a mixed material; finally pouring the mixed material into a mold supporting box, and vacuum freeze drying the mixed material so as to obtain the convenient vegetable crisps. According to the method disclosed by the invention, the vegetable pulp and specific components of other raw materials are concocted and made into the novel vegetable crisp food by a vacuum freeze drying method for the first time, the vegetable crisp food is convenient to eat, and the variety of vegetable products in the market is enriched. The vegetable crisps which are prepared by the preparation method furthest prevent nutrient components in the vegetables from running off and prevent color and taste from being destroyed, and the problem that the flavor of the vegetable products is changed due to the conventional preparation technique is solved. The vegetable crisps prepared by the method are low in water content, light in weight, easy to store and convenient to transport and carry.

The invention relates to a bisphenol-A F-PEG block copolymer hydrophilic surface coating and a preparation method thereof. The preparation method comprises the steps: firstly, preparing a bisphenol-AF-PEG block copolymer by olefin metathesis polymerization; then, and constructing a hydrophilic anti-icing surface coating by using the prepared block copolymer. The prepared bisphenol-A F-PEG block copolymer is controllable in molecular weight, capable of producing a microphase separation structure on the surface and strong in hydrophobicity; and the preparation method is simple, mild in reactioncondition, short in reaction time and beneficial to industrialization. The water contact angle of a hydrophilic surface formed by the block copolymer is smaller than 20 DEG. Although the interactionforces of water molecules of a fluorine-containing chain segment and a PEG chain segment are different, the water molecule aggregation on the surface of the copolymer can be disturbed at low temperature, ice adhesion can be avoided at the temperature ranging from 7 DEG C below zero to 0 DEG C, and the icing time can be prolonged. The bisphenol-A F-PEG block copolymer hydrophilic surface coating has a wide application prospect in the anti-icing field.

The invention relates to a firefighter fire-extinguishing protective garment with the anti-icing and warm-keeping performance. The garment is composed of a jacket and trousers, and a collar material of the jacket is sequentially composed of an outer layer I, a waterproof breathable layer I, a heat insulation layer I, an outer layer woven fabric I and a warm-keeping fabric layer I from outside to inside; a lower hem material of the jacket is sequentially composed of an outer layer II, a waterproof breathable layer II, a heat insulation layer II, a comfortable layer woven fabric III and a warm-keeping fabric layer II from outside to inside; other parts of the jacket are made of an outer layer III, a waterproof breathable layer III, a heat insulation layer III and a comfortable layer woven fabric V in sequence from outside to inside; cuffs of the jacket are thickened rib cuffs; the trousers material is composed of an outer layer IV, a waterproof breathable layer IV, a heat insulation layer IV and a comfortable layer woven fabric VII in sequence from outside to inside. The comfortable layer of the firefighter fire-extinguishing protective garment is subjected to warm-keeping design, the outer layer of the firefighter fire-extinguishing protective garment is subjected to anti-icing design, the warm-keeping performance and the anti-icing performance of the protective garment are achieved, and the movement comfort and the fighting efficiency of the firefighter are guaranteed.

The invention discloses a stem cell cryopreservation method and a cell cryopreservation solution used by the stem cell cryopreservation method, and belongs to the technical field of stem cell preservation and culture. The stem cell cryopreservation method comprises the following steps: S1, preparing a solution I; S2, preparing a solution II; S3, taking human adipose tissue-derived stromal cells, washing the cells with PBS once, digesting the cells with 0.05% trypsin to change the cells from fusiform to roundness to obtain a cell suspension, and then centrifuging the cell suspension; S4, takingthe solution I to re-suspend the cells; S5, taking the solution II to resuspend the cells; and S6, putting a cryopreservation tube into a programmed cooling box; putting the cell cryopreservation tube in liquid nitrogen for long-term preservation. The cell cryopreservation solution comprises a liquid I and a liquid II, wherein the liquid I comprises human serum albumin, bFGF and EGF, and the liquid II comprises serum replacement cytochrome C, betaine, antifreeze protein, glucose, low-molecular-weight glucan, mannan, sodium chloride, sodium lactate, potassium chloride, calcium chloride and dimethyl sulfoxide. The method has the advantage of improving the cryopreservation quality and stability of the cells.

The invention relates to a production method of a super-hydrophobic film. The production method of the super-hydrophobic film comprises the following steps: adding PVDF into a DMF solution, and at a room temperature, conducting stirring until the solution is clear to obtain a PVDF solution; stirring the PVDF solution and silicon dioxide particles evenly to obtain silicon dioxide and PVDF mixed paint; producing a hydrophobicity modification solution: mixing and then stirring 1H,1H,2H,2H-perfluorooctyltriethoxysilane and absolute ethyl alcohol for use; and coating a matrix with a layer of the silicon dioxide and PVDF mixed paint by means of a Czochralski method, after drying is conducted at 60-80 DEG C, spraying the hydrophobicity modification solution by means of a spray method, and conducting treatment in an oven at 110-140 DEG C for 1-2 hours to obtain a super-hydrophobic coating. Anti-icing tests of the coating at -20 DEG C are conducted, and supercooled water is sprayed; results show that the coating has significant anti-icing performance; after being soaked under conditions of strong acids and strong alkalies for 120 hours, the coating still has very strong anti-corrosion capability; meanwhile, the coating can cope with effects of high-temperature and low-temperature weather on the coating; and therefore, the material is excellent hydrophobic paint, and has great application potential.