30results about How to "Free diffusion" patented technology

The invention relates to a graphene composite material for a cathode of a lithium ion battery and a preparation method of the graphene composite material, belonging to the technical field of preparation of the electrodes of the lithium ion batteries. The preparation method of the graphene composite material for the cathode of the lithium ion battery comprises the steps of: oxidizing and ultrasonically dispersing a graphene material in a concentrated acid environment, then mixing the obtained graphene material with a titanium source, and drying and calcining an obtained mixture to obtain the graphene composite material. The graphene composite material for the cathode of the lithium ion battery, provided by the invention, is high in electric conductivity; an obtained electrode slice is low in resistance and has structural stability in a charge/discharge process; and the prepared lithium ion secondary battery is high in capacity, good in safety, favorable in cyclic performance and long in service life.

The invention relates to a composite film electrode and a preparation method thereof. The electrode is a graded porous nano composite film which is composed of an insulating substrate, a first binding layer, a conductive gold layer, a second binding layer and a modified aluminum layer, wherein small holes with a hole diameter of 2-20 nm are uniformly distributed on the conductive gold layer according to a distribution density of 1010/cm2-1012/cm2, and the small holes with the hole diameter of 20-400 nm are uniformly distributed on the second binding layer and the modified material layer according to the distribution density of 109/cm2-1012/cm2; and the preparation method of the electrode comprises the following steps of: firstly, preparing a multi-layer composite film on the insulating substrate, then, performing anodizing and hole enlargement on the multi-layer composite film to implement that an aluminum layer becomes a porous alumina layer, a gold layer becomes a nano porous structure, the second binding layer becomes a porous oxide of tantalum, niobium or titanium, and cleaning and drying the multi-layer composite film to get a finished product of the graded porous nano alumina/gold composite film electrode. The graded porous nano alumina/gold composite film electrode has high in electroanalytical activity and the dual advantages of a nano porous gold and a porous anodizedaluminum; and the preparation method is simple and reliable, solves the defect of inconvenience in operation caused by high brittleness of an AAO, and fits for mass production.

The invention provides an inorganic ecologic wood. The inorganic ecologic wood is prepared through using, by weight, 100.0 parts of inorganic gelling powder, 6.0-42.0 parts of a dispersible vegetable fiber, 8.0-25.0 parts of amorphous SiO2 mineralization powder, 0.0-5.5 parts of a modification aid, and 23.5-26.2 parts of a complex formulation solution. The inorganic ecologic wood reserves the good plasticity and environmental protection characteristic of the inorganic material, and has the ecologic functions of formaldehyde cleaning, antibiosis, mildew resistance and negative ion generation. The invention also provides a preparation method of the inorganic ecologic wood, and applications of the inorganic ecologic wood as building materials comprising ecologic board, wood floors, interior and exterior decorative boards or decorative modeling boards and the like.

The invention relates to a method for growing an upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond substrate, which comprises the following steps: firstly, when electro-deposition is used in an electrochemical technique, using hydrogen bubbles generated on the surface of a boron-doped diamond film substrate material as a dynamic template so as to obtain an upright three-dimensional netlike nano metal plate; and secondly, in the process of performing a chemical method, using the upright three-dimensional netlike nano metal plate as a template, and through substitution reactions, using high valent noble metal to replace the upright three-dimensional netlike nano metal plate so as to obtain the upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond film. The special structure obtained by the method not only can give full play to the advantages of the boron-doped diamond, but also can greatly improve the specific surface area of the noble metal and effectively promote the diffusion of active reaction molecules in a hole pipeline by a netlike nano structure. Simultaneously, the special combination ensures that a working electrode obtains high electrochemical properties in material types and structural shapes.

The invention provides pichia kudriavzevii embedded tea polyphenol microcapsules. The microcapsules are characterized in that tea polyphenol yeast microcapsules are specifically prepared through embedding tea polyphenols into yeast cells by utilizing adsorption and assimilation functions of the pichia kudriavzevii. A method is simple in operation steps and low in cost; the embedding rate reaches 68.75 percent and is much higher than that of microcapsule products in the prior art. The tea polyphenol yeast microcapsules prepared by the method also can keep the anti-oxidization performance of theoriginal tea polyphenols; meanwhile, the pichia kudriavzevii has heat resistance and acid and alkali resistance; the tea polyphenol microcapsules can be used for effectively improving the stability of the tea polyphenols under the conditions of illumination and the like.

The invention provides a dressing containing trehalose reparable skin barriers and a making process of the dressing. The dressing comprises the following raw materials in parts by weight of 55-100 parts of trehalose, 13-25 parts of hippophae rhamnoides fruit polysaccharide, 65-95 parts of glycerine, 32-46 parts of sweet almond oil, 13-20 parts of glusulase, 25-35 parts of pentadiol, 3.0-5.0 partsof phenoxyethanol, 2.3-3.5 parts of triethanolamine and 765-852 parts of water. According to the dressing prepared by a specific technology and limited technology parameters, the repair capacity of skin is improved, skin sensibility after laser therapy can be relaxed, and the repair time of damaged skin can be shortened.

The invention discloses biomass-based hydrogel of immobilized yeast and a preparation method of the biomass-based hydrogel. The hydrogel has a three-dimensional macroporous network structure, adsorption sites are fully exposed, water-soluble small molecules can be freely diffused, and the hydrogel is a dual-network hydrogel adsorbent with very high adsorption efficiency on metal ions in an aqueoussolution. According to the invention, microorganisms with an adsorption effect are immobilized into the gel adsorbent, so that the gel adsorbent can fully diffuse water-soluble small molecular substances, has an excellent adsorption effect on heavy metal ions in water, and is environment-friendly, low in cost and convenient to popularize and use.

The invention relates to the technical field of polysaccharide extraction. Aiming at solving the problems of low polysaccharide extraction rate from codium fragile and difficult separation, the invention provides a method for extracting and separating polysaccharide from codium fragile. The method comprises the following steps: performing pretreatment comprising degreasing on codium fragile; thenperforming extracting on the codium fragile with hot water, performing alcohol precipitation, performing standing overnight, performing suction filtration, adding ethanol for washing, and carrying outdehydrating and drying to obtain a crude polysaccharide which is extracted from the codium fragile with hot water; and finally separating the crude polysaccharide which is extracted from the codium fragile with hot water by using a strong anion exchange chromatographic column: concretely performing gradient elution with an NaCl solution, collecting the polysaccharide by a fraction collector, performing pressure-reduced concentration on the eluent of the components, performing dialysis for desalination, and performing freeze drying to obtain the product polysaccharide. According to the method,cell wall rupture and polysaccharide release are greatly promoted through fatty acid ether sodium sulfate and polysorbate-80 active polypeptide in advance, so that the extraction time is reduced, thepolysaccharide extraction rate is reduced, and the polysaccharide with anti-HPV activity is prepared through proper gradient elution in the strong anion exchange chromatographic column.

The invention relates to a glass welding method. The method comprises the following steps: carrying out laminating treatment on glass; carrying out microwave treatment on the laminated glass; and carrying out welding treatment on the glass subjected to microwave treatment. Firstly, laminating is performed on the glass to enhance the surface interface activity of the glass and promote the combination between glass interfaces; microwave treatment is conducted on the attached glass, microwaves penetrate into the glass, the temperature of the glass is increased through friction generated by the interaction of the microwaves and the glass, the interior and the exterior of the glass are almost heated at the same time, a body heat source state is formed, and the interior and the exterior of the material are heated uniformly and consistently; extra pressurization is not needed, and the glass interface can be freely diffused in the microwave treatment process, so that the effects of tight attachment and no bubble between the glass are realized; and meanwhile, the high temperature generated by the microwaves can enable the interface group of the glass group to have weak connection, and after high-temperature welding, silicon-oxygen bond combination between the glass is promoted, so that the effect of tight connection of the glass plates can be realized.

The invention relates to a filter screen, a preparation method of the filter screen and a filtering device applying the filter screen. The filter screen comprises a collection base cloth and a nanofiber layer taking the collection base cloth as a substrate, and the nanofiber layer is a nanofiber structure which is prepared by an electrostatic spinning method and has positive charges. The filter screen provided by the invention adopts a nanofiber structure, has the advantages of high specific surface area and high porosity, and can obviously enhance the interception effect on tiny particles.

The invention relates to a smoke detection system and an aircraft with the same. The smoke detection system comprises a smoke detection device and a plurality of temperature measuring devices. The smoke detector is arranged in the cabin and is used for sensing the smoke concentration in the cabin and sending out smoke alarm information. The temperature measuring devices are arranged in the cabin and used for sensing the temperature in the cabin. When the temperature sensed by at least one temperature measuring device reaches or exceeds a preset temperature value, the ventilation device of the cabin is controlled to stop ventilation. According to the invention, the smoke detector is directly arranged in the cabin of the aircraft, so that the smoke detector is prevented from being installed in the ventilation pipeline to influence ventilation airflow, and the smoke detector is prevented from sucking dust in the ventilation pipeline to cause false alarm.

The invention provides a low-cost method for uniformly preparing a graphene film. The method comprises the following steps: heating inlet air, performing high-temperature annealing on a base, introducing a carbon source, performing graphene film growth, and finally cooling. The method is capable of greatly reducing the dosage of reaction gases, effectively utilizing the reaction gases to prepare graphene and lowering the graphene preparation cost; during a preparation process, a continuous pumping link is omitted, so that the loss and energy consumption of a vacuum pump are greatly reduced; graphene growth is rapid, and the method has the advantage of industrialization; the growth environment stability is high, and the problem that growth environment pressure and gas proportion fluctuate due to instable original continuous inlet gas flow and an instable pumping valve is solved; a method of introducing the gases to achieve reaction pressure and then stopping gas introduction without pumping is adopted to maintain cavity pressure, so that the gases freely diffuse on the surface of a metal catalyst and are uniformly distributed, the sheet resistance uniformity of the graphene film is obviously improved, and thus the graphene quality is improved.