31results about How to "Omit preprocessing" patented technology

The invention relates to a double colour fluorescent chemical sensor used for visually detecting explosive, in particular to a paper-based or membrane-based sensor comprising a filter paper or glass slide substrate and double colour quantum dot superstructure silicon oxide nano particles uniformly distributed on the substrate. The method for manufacturing the sensor comprises the following steps of: firstly embedding red or green quantum dots into silicon oxide nano particles, aminating the surface of silicon oxide, then carrying out covalence coupling and coating a green or red quantum dot sensitive layer to obtain the double colour quantum dot superstructure silicon oxide nano particles, and finally processing to obtain the fluorescent chemical sensor. By applying the sensor, explosive residue with the trace of 5nanogram/mm<2> can be visually and rapidly detected online in real time. The fluorescence intensity of outer quantum dots is 2-10 times that of inner quantum dots.

The invention discloses a difunctional near-infrared fluorescence molecular probe for detecting hypochlorous acid and a preparation method for the same. The difunctional near-infrared fluorescence molecular probe has the structure general formula defined in the specification, wherein R1 and R2 independently represent 2-pyridyl, 2-furyl, substituted 2-pyridyl, substituted 2-furyl, aryl or substituted aryl respectively; R3 is selected from methyl, ethyl or propyl; and X- is selected from Cl-, Br- or I-. The changes of the fluorescence intensity and the colour of the probe are caused due to the breakage of the double bonds of the fluorescence probe at the end of a chain under the oxidation of hypochlorous acid, so that the fluorescence probe can be used for visual detection for hypochlorous acid in an aqueous solution, and is suitable for detection for hypochlorous acid generated by enzymatic reaction in the condition of a physiological environment simultaneously, and a detection line can achieve 0.70mu mol/L. The method disclosed by the invention has the advantages of being capable of detecting hypochlorous acid with a fast speed and high selectivity, suitable for bioimaging, and the like.

The invention discloses a preparation method of a self-cooled and hole-closing-resistant lithium ion battery diaphragm, and belongs to the technical field of the battery diaphragm. The slurry layer is arranged at one side end surface or two side end surfaces of a basement membrane, thereby obtaining the self-cooled and hole-closing-resistant lithium ion battery diaphragm after the drying; the slurry layer is the ceramic slurry or the erythritol modified ceramic slurry, the erythritol modified ceramic slurry is at least coated at one side end surface, and the specific method for preparing the erythritol modified ceramic slurry is disclosed. The preparation method disclosed by the invention provides the stable and efficient process of the self-cooled and hole-closing-resistant lithium ion battery diaphragm; the prepared erythritol modified ceramic slurry has low shrinkage and high security at the high temperature of the ceramic slurry.

The invention discloses a metal matrix composite material, a preparation method thereof and an application of the composite material. The metal matrix composite material comprises a metal matrix bodyand MoAlB particles distributed in the metal matrix body, and transition layers continuously wraps the surfaces of the MoAlB particles. The preparation method of the metal matrix composite material includes the steps: (1) mixing MoAlB powder and metal powder to obtain MoAlB-metal mixed powder; (2) heating the MoAlB-metal mixed powder, and cooling the heated MoAlB-metal mixed powder to obtain the metal matrix composite material. The metal matrix composite material effectively solve the problem of poor binding force between a reinforcement phase and the metal matrix body in the prior art, reinforced effects are sufficiently played, the mechanical property of the metal material is improved, the method is simple and environmentally friendly, mass production is facilitated, and the composite material is applied to aeronautics, astronautics, ships, rail traffic, automobiles, nuclear industry and ordnance industry.

The invention discloses a preparation method of polyethyleneimine modified ascorbic acid carbon nanodots. The method comprises the following steps of adding polyethyleneimine to a reaction kettle containing ascorbic acid solution, wherein the molar ratio of polyethyleneimine to ascorbic acid is 0.05-1:1; heating to 180-220DEG C after sealing, reacting for 5-7h, cooling and filtering, dialyzing for6-10h, replacing with ultra-pure water at intervals of 1.5-2.5h, and freeze-drying to obtain carbon nano-point powder. And application of ascorbic acid carbon nanodots as a fluorescent probe in visual detection is also provided. The probe provided by the invention is sensitive to hypochlorous acid response having a detection limit of 14nmol/L, has high selectivity and good stability to hypochlorous acid to enable long-term preservation and use, is simple in synthesis, and researches portable hypochlorous acid detection test papers to achieve the purpose of simple, rapid and visual detection of hypochlorous acid, which is beneficial to the popularization and application of commercialization.

The invention discloses a citrus peel progressive extraction method and a citrus peel progressive extraction device, which can recover citrus peel essential oil and citrus kernels by performing pretreatment and progressive extraction on citrus peels. The high-added-value products such as citrus peel infusion syrup, hesperidin, pectin and dietary fibers can be sequentially obtained in the progressive extraction process of the citrus peel, and the method has extremely important economic value; according to the method and the device disclosed by the invention, the extraction of citrus immersion syrup, hesperidin and pectin and the purification treatment of dietary fiber raw materials can be sequentially completed under the condition of not transferring citrus peels, the traditional complicated extraction operation is converted into simple, convenient, systematized and continuous operation, the labor efficiency is greatly improved, and the material and power consumption is reduced; according to the method, a two-time or three-time leaching phase process is adopted, so that the concentration of the extract in the leaching solution is greatly improved, the product recovery rate is increased, the citrus peel is fully utilized in a real sense, and an extremely important new resource is expanded for the development of the food processing industry.

The invention relates to a TPL preheating scale prevention process in a wastewater industry. The process comprises the following steps: utilizing a TPL preheating scale prevention process on a preheating part, enabling materials to be mixed with zirconia particles before entering a shell and tube heat exchanger, enabling the materials to flow in the heat exchanger, enabling the separated calcium sulfate crystal and zirconia solid particles to be rubbed and collided with one another, and enabling the solid particles and the tube walls to be also rubbed and collided with one another, so that disturbance on a flow boundary layer is increased due to jump of the solid particles nearby the wall surfaces of heat exchange tubes, adsorption deposition of dirt components in the wall surface can be prevented or retarded, the flow boundary layer of fluid is damaged by friction and collision of the solid particles and the heat exchange tube walls, heat resistance of convective heat transfer is reduced, and the convective heat transfer coefficient is increased. According to the TPL preheating scale prevention process in the wastewater industry disclosed by the invention, the scale formation problem of a preheater is effectively solved, the energy-saving effect is obvious, the technology is mature and reliable, the heat transfer efficiency is improved, and the fire coal usage amount and environmental pollution are reduced; moreover, the cleaning period is prolonged, the actual production time is increased, and the labor intensity is reduced.

The invention provides a preliminary cleaning rainwater collection module. The preliminary cleaning rainwater collection module is prepared from, by weight, 15-20 parts of an ethylene-vinyl acetate copolymer, 8-14 parts of 2-methyl methacrylate, 15-20 parts of deionized water, 11-15 parts of water soluble acrylic resin, 14-17 parts of nanometer activated carbon, 1-3 parts of acetamide, 2-4 parts of antioxidant, 5-9 parts of calcium carbonate, 4-7 parts of carbon black, 6-12 parts of kieselguhr and 1-2 parts of a dispersing agent. The rainwater collection module can perform preliminary cleaning on rainwater in the water storage process, can remove particulate matter contained in rainwater, and saves the cost. An implementation method is simple and has the wide application prospect.

The invention relates to a dry type hydrothermal device and method, and belongs to the field of water heating. The dry type hydrothermal device comprises a pressure gauge, a thermometer, an inert gas port, a flange, a reaction kettle cover, an inner kettle body and an outer kettle body. Compared with the traditional water heating method, the reaction kettle is pressurized by using inert gas instead of water vapor pressurization of the traditional hydrothermal method, and the hydrothermal reaction is carried out at a set temperature by directly using the moisture of the material, so that the pretreatment process of the hydrothermal reaction material is omitted, a large amount of water resources are saved, and the cost is reduced; meanwhile, the water content of the hydrothermal product is low, the treatment cost of subsequent drying or secondary utilization is reduced, and the cost is further reduced.