68 results about "General chemist" patented technology

The present invention discloses a carrier type slowly-released fertilizer and its preparation method. It not only has basic composition of general chemical fertilizer, but also contains carrier material, and its preparation method includes: firstly, dissolving carrier material with a certain quantity in water, then mixing general chemical fertilizer with it according to a certain proportion, uniformly stirring them to make them implement full reaction, adding cross-linking agent, making them implement further full reaction, removing water, finally pulverizing dried material and granulating.

The invention relates to a method for preparing luminescent carbon dots from carbohydrate. The carbohydrate based carbon dots prepared by the invention can be used for biological imaging and analysis to determine the content of metal ions. The method for preparing luminescent carbon dots from carbohydrate provided by the invention is as below: mixing carbohydrates with a modifier with amino at different molar ratios; reacting for a certain time by a hydrothermal method; filtering; regulating the pH to a neutral state, conducting dialysis and purification to remove excessive salt, so as to obtain the carbohydrate based luminescent carbon dots. The method for preparing the luminescent carbon dots provided by the invention uses carbohydrates as raw materials, which are easily available and have low cost; the obtained carbon dots have high quantum yield; and the equipment for the preparation process is simple,the method can be completed in general chemistry laboratory, and is easy for popularization.

The disclosure relates to a dry reagent assay device having two or more test zones for detecting two or more analytes in a test sample. In one embodiment, the test zones may be the site of a binding reaction between members of a binding pair, or they may be the site of a general chemistry reaction. The disclosure also relates to methods for performing assays to detect analytes in test samples using such devices.

The invention provides a medium of a high-voltage ceramic capacitor with high performance and middle-low temperature sintering, which relates to the technical field of inorganic non-metal material. The invention adopts the prior method for preparing the medium of the high-voltage ceramic capacitor to prepare the medium of the high-voltage high-stability ceramic capacitor containing no lead, cadmium or other toxicities, and having high performance and middle-low temperature sintering (the sintering temperature is between 1,100 and 1,150 DEG C) by the prior chemical raw materials of capacitor ceramics. The medium is applicable to the preparation of single-chip ceramic capacitor and multi-layer tablet ceramic capacitor so as to greatly reduce the cost for the ceramic capacitor and avoid environmental pollution during preparation and application. The medium is characterized in that the medium comprises the following compositions (in weight percentage): 58 to 92 percent of BaTiO3, 2 to 19 percent of SrTiO3, 0.5 to 10 percent of CaZrO3, 0.05 to 1 percent of Nb2O5, 0.03 to 1.0 percent of Y2O3, 0.03 to 1.0 percent of Co2O3, and 6 to 30 percent of Bi2Sn2O7, wherein each of the BaTiO3, the SrTiO3 and the CaZrO3 is synthesized by a solid phase method by the prior chemical materials. The medium has high voltage resistance reaching over 10kilovolt/millimeter, specific inductive capacity of between 2,200 and 3,500 and small variance ratio of capacitance temperature, accords with the requirement on X7R property, Y5T and Y5U property, has excellent stability and high security when used, and does not pollute environment.

The invention discloses ultrahigh-molecular-weight polyethylene fiber filter cloth, which is characterized by being formed by weaving ultrahigh-molecular-weight polyethylene fiber warps and ultrahigh-molecular-weight polyethylene fiber wefts, wherein filtering holes are formed between the ultrahigh-molecular-weight polyethylene fiber warps and the ultrahigh-molecular-weight polyethylene fiber wefts. The ultrahigh-molecular-weight polyethylene fiber filter cloth has the advantages of high precision, high load, high tensile strength, service life of over 3 times that of normal chemical fiber, dry-hot shrinkage rate of less than 2 percent, improvement on the acid and alkali resistance, wear resistance and tensile strength, long service life, expansion in the using range of the filter cloth, improvement on the filtering quality and reduction in the filtering cost.

The invention relates to a method for ultrasonic removal of carbon deposition. According to the technical scheme of the invention, the method for ultrasonic removal of the carbon deposition comprises the following steps: deoiling parts, preparing a carbon deposition removing bath solution, carrying out ultrasonic removal of the carbon deposition, and carrying out hydrochloric acid corrosion. The method for ultrasonic removal of the carbon deposition utilizes the carbon deposition removing bath solution with a special formula, has the advantages of fast carbon deposition removing speed, high quality and easy implementation, and besides reduces the environmental pollution caused by using an ordinary chemical immersion method to remove the carbon deposition.

The present invention provides a fabric that can be used in various applications, that is breathable, waterproof, and resistant to common chemicals. The textile laminate includes a breathable chemical-resistant layer that is adhered to either a microporous membrane layer or a monolithic hydrophilic layer. The chemical-resistant layer is a hydrophilic polyurethane film that balances the chemical-resistant components of its formulation with the components that provide breathability, such that a textile laminate is created that resists common chemicals while maintaining a high degree of breathability.

The invention discloses a paper sensor for rapid on-site detection of fluorine ions in water and a preparation method thereof, and is characterized in that the paper sensor is a membrane based sensor with a filter membrane as a substrate, wherein the filter membrane is printed with uniformly distributed fluorescent nanoprobes; the fluorescent nanoprobes are prepared by making luminous graphene oxide and silver nanoparticles specifically combined in a manner of borate bonds through surface functionalization modification according to the effect of resonance energy transfer, so as to form the fluorescent nanoprobes; F<-> can destroy the specific combination of the borate bonds, so that silver nanoparticles are away from luminous graphene oxide, the probe system fluorescence is recovered, and thus F<-> is detected. The paper sensor aims at the deficiency of the prior art, can achieve rapid on-site visual detection of the fluorine ions in an environmental water body; the preparation method has the advantages of simple operation and low cost, can be completed in general chemistry laboratories, is easy to popularize, and has broad application prospects in environmental detection and protection and many other fields.

The invention discloses ultra-high molecular weight polyethylene filter cloth and a production method thereof. The ultra-high molecular weight polyethylene filter cloth is manufactured by ultra-high molecular weight polyethylene warp yarns and ultra-high molecular weight polyethylene weft yarns by adopting a twilled weave method. According to the ultra-high molecular weight polyethylene filter cloth and the production method thereof, the precision is high; the load is strong; the tensile property is good; the service life of the ultra-high molecular weight polyethylene filter cloth is three times longer than filter cloth made of common chemical fibers; the dry heat shrinking percentage is lower than 2 percent; the acid and alkali resistance, the abrasion resistance and the tensile property are improved; the service life is prolonged; the application range of the filter cloth is broadened; the filter quality is improved; and the filter cost is reduced.

The invention provides a preparation method of an environment-friendly enzyme detergent for down feather, comprising the following steps: (1), selecting plants, fruit peels and fresh kitchen waste functional in washing and deterging; (2), burdening according to a ratio of water, the plants, fruit peels and fresh kitchen, and brown sugar being 10:3:1; (3), placing in a container, and stirring well; (4), sealing, opening and stirring once a day every 1-30 days, and sealing and storing for longer than 60 days; (5), filtering to obtain stock solution; (6), adding plants effective in deterging into the stock solution; (7), sealing and soaking for 10-20 days; (8), removing residue, and filtering. The invention has the advantages that the detergent shows better deterging power in washing down feather, is effective in removing various bacteria and viruses and longer in antibacterial time, and rarely grows germs in long-term usage; treatment work for discharged wastewater is greatly lower than that of common chemical detergents; the detergent is made from fruit peels, plants and kitchen waste, waste is turned into wealth, and the environmental pollution due to discarded fruit peels, plants and kitchen waste is also reduced.

The invention belongs to the fields of nanometer materials and biomedical analysis chemistry, and particularly relates to a one-step method for synthesizing DNA functionalized Zn doped CdTe quantum dots. The quantum dot probe is prepared by connecting phosphorylated DNA to surface of quantum dot by coordination of sulfur and cadmium, and quantum dot surface can be connected with 1-2 DNA fragments. The preparation method is as below: in a synthesis process of quantum dots, phosphorylated DNA is added to obtain the DNA functionalized quantum dot probe through a one-step reaction. The probe can be used as a bifunctional nanometer material, has high fluorescence quantum yield, good biocompatibility and good dispersion, and can be used for detection of DNA fragment and protein, cell identification and tumor targeting. Compared with a traditional DNA marked quantum dot method, the preparation method provided by the invention is simple and low-cost, does not require expensive preparation facilities, can be accomplished in general chemistry laboratory, and can be widely used in fields of biological detection, cellular imaging, target tracing and disease diagnosis, etc.

The invention relates to a method used for preparing a binary-nano composite photo-catalyst which takes titanium dioxide as the main body, and the prepared catalyst is applied to the organic wastewater treatment. The preparation method is characterized in that the supercritical fluid drying technology or the common chemical drying technology is combined with four preparation methods of the coprecipitation method, the successive precipitation method, the surface coating method and the mechanical mixing method to prepare the nano composite photo-catalyst which takes the titanium dioxide as the main body, thereby enlarging the range of the spectral response, enabling the absorption wavelength of the catalyst to be shifted toward the visual light wavelength, and improving the quantum effect.

The invention relates to an electrocatalytic oxidation water treatment device and a method for treatment of hardly degradable organic wastewater. The device includes at least two interconnected electrolytic tanks, each electrolytic tank is internally provided with positive and negative electrode plates respectively, each positive electrode plate and negative electrode plate are respectively connected to the positive pole and negative pole of a power supply, the positive electrode plates adopt titanium based coated plates, and the negative electrode plates adopt titanium plates. The method includes: filtering to-be-treated organic wastewater, making the wastewater to a mean value, and bringing the wastewater into the electrocatalytic oxidation water treatment device; connecting a pulsed power supply in the electrocatalytic oxidation water treatment device, and carrying out electrochemical reaction on the organic wastewater fully under the action of the positive and negative electrode plates. The device provided by the invention has simple structural design, is energy-efficient in treatment of organic wastewater, can be combined with ordinary chemical oxidation water treatment technology and other water treatment technologies to perform process combined treatment or depth treatment on enterprise generated sewage, and can realize industrial application. The treated industrial sewage can be returned to the production process for use as reclaimed water or up-to-standard discharge.

The invention discloses sea-island polyamide 6 fiber whose cost is low, normal dyeing is color and luster and physical-mechanical properties is excellent and process for preparation. Sea-island polyamide 6 fiber comprises sea components which is formed by fiber grade polyamide 6 slices and island components which is formed by at least four fiber bundles, fiber bundles comprise fiber grade polyester slice, and polyamide 6 which is in sea component accounts for 40-80% of the total weight. The invention prepares sea-island polyamide 6 fiber through a pair of screw extruder and sea-island composite spinning assembly, overcomes the shortcoming that color is ashy which is caused by fracture of inner chemical bond when the traditional polyamide 6 fiber is dyeing, and polyamide 6 fiber is led to color and luster when in dyeing. The manufacturing cost is greatly reduced than single nylon through analyzing according to the price difference of polyester and polyamide 6 fiber, while physical-mechanical properties are basically unchanged, therefore the shortcoming of common chemical fibers is fundamentally overcome, and the process for preparation is simple and easy to operate.

The present invention relates to a preparing method of a natural bamboo leaf extract antimicrobial agent, belonging to the field of preparing antibacterial agents. The method uses fresh moso bamboo leaves as a raw material. After yellow and decaying bamboo leaves are removed, the moso bamboo leaves are dried, the dried moso bamboo leaves are pulverized, the moso bamboo leaf powder is dissolved in a phosphate buffer, and the mixture is subjected to magnetic stirring in an ice-water bath to obtain a bamboo leaf pulp. Then the bamboo leaf pulp is centrifuged at a high-speed to obtain a supernatant. Ammonium sulfate is used to salt out crude antimicrobial protein peptide, and finally a natural bamboo leaf extract antimicrobial agent is obtained by dialysis. The used raw materials are natural plant leaves which are renewable resources and are large in resource maintaining amount and low in production cost, and so that the antimicrobial agent is easy in preparation steps and operations. The bamboo leaves contain a variety of natural compounds. The natural bamboo leaf extract antimicrobial agent has a good antibacterial effect, produces no influence on the flavor of food to be preserved, and has an antibacterial effect significantly higher than that of ordinary chemical antibacterial agents.

The invention discloses a screening method for hemostatic and antibacterial Chinese herbal medicine and a toothpaste formula, and belongs to the technical field of Chinese herbal medicine toothpaste preparation. The screening method for the Chinese herbal medicine comprises the first step of establishing an assessment index system, the second step of determining assessment index weights and checking consistency, and the third step of conducting quantification processing through fuzzy comprehensive judgment and conducting screening to obtain hemostatic and antibacterial Chinese herbal medicine. The toothpaste formula comprises 1-3.2% of Chinese herbal medicine, 64.8-66.1% of auxiliaries, and the balance deionized water, wherein the sum of weight percents of Chinese herbal medicine, auxiliaries and deionized water is 100%. By means of the Chinese herbal medicine toothpaste, a protection film can be formed on the gingival, the gingival can be protected for a long time, and the resistance to sensibility of the gingival can be improved. Compared with ordinary chemical toothpaste, the Chinese herbal medicine toothpaste has the advantages that smell is good, and decayed teeth, gum bleeding and other oral cavity problems can be remarkably eased, relieved and prevented when used for a long time.

The invention discloses a making method of colored toner. The method comprises the steps of dissolving dye into an oil phase, then mixing the oil phase with a water phase, emulsifying by using a membrane emulsification apparatus under certain pressure, and adopting an emulsion polymerization method to obtain colored microspheres. The method solves the problems that the original 'mixed melting method' is complicated in process technology, high in requirements for raw materials, equipment and process conditions, high in energy consumption, and the like. The method also solves the problem that the common chemical method for preparing the toner is poor in process amplification stability. The colored microspheres prepared by the method are good in particle size uniformity, high in degree of sphericity, bright in color, glossy, high in resolution ratio, low in powder rejection rate, simple in technology and low in energy consumption, and do not need to be classified; after the colored microspheres are used, the colored toner with the needed particle size can be obtained at one time, and a series of performance tests such as particle size, sphericity, amount of charge and fixing temperature distribution can be carried out on the colored toner.

The invention discloses a biodegradable infrared emission passive radiation cooling structure and cooling method. The biodegradable infrared emission passive radiation cooling method comprises the steps that ethyl cellulose, ethyl alcohol and water are mixed and stirred to form a premise solution; the premise solution is put into a container, the ethyl alcohol is evaporated, the ethyl cellulose and the water are separated, micropores are formed in the ethyl cellulose, and a cooling material layer is formed; the cooling material layer is adhered to the surface of a heat transfer material layer;the cooling material layer is covered with a layer of material plate with the high light transmittance, and the material plate serves as a protection layer; a heat insulation cavity layer is formed between the cooling material layer and the protection layer; the heat transfer material layer, the cooling material layer, the heat insulation cavity layer and the protection layer form the passive radiation cooling structure, and the heat transfer material layer makes contact with a cooled body; and the protection layer is exposed outdoors. According to the biodegradable infrared emission passiveradiation cooling structure and cooling method, environmental protection is facilitated, the problem that refrigerating energy consumption is high or active refrigerating can not be adopted can be solved, and meanwhile the problems that a common chemical material can not be regenerated and greatly influences the environment are solved.

The invention provides a preparation method for garnet phase nano-powder. In a chemical coprecipitation process, the method utilizes the special reaction environment of ultrasonic cavitation effect to prepare rare earth doped garnet phase nano-powder with higher sintering activity. Compared with a common chemical coprecipitation method, the method provided by the invention can, on the one hand, promote even mixing of powder, and on the other hand can effectively avoid powder agglomeration, so that the powder obtained by calcinations at a same temperature has a higher specific surface area than powder prepared by the common coprecipitation method, and then the ceramics prepared from the powder by follow-up high-temperature sintering has higher density than ceramics prepared by the common coprecipitation method.

This invention provides a method for atomic transformations carried out under conditions akin to chemical catalysis. Liquid and solid state catalysts are used in a two-step process. We have found that the high ionic/electric activity of concentrated sodium hydroxide solution in combination with heating is sufficient to induce atomic transformation and provide a solid phase catalyst of high aluminum and silicon content. This product when heated at a temperature of 1000° C. yields numerous elements of higher atomic masses. Thus, atomic transformation (transmutation) is demonstrated by using common chemicals and simple laboratory procedures

The invention relates to a formula composition of near-zero-temperature coefficient piezoelectric ceramic for surface acoustic waves, which is prepared from common chemical raw materials by a conventional solid-phase process. The invention is characterized in that the formula of the piezoelectric ceramic is [(Pb(1-3/2x+y/2)Lnx][Ti(0.98-y)Mn0.02By]O3, wherein 0.01<=x<=0.5; Ln is Ce, Sm or Gd; 0.01<=y<=0.8; and B is In or Yb. The delay time temperature coefficient (T[CD]) of the prepared piezoelectric ceramic is approximate to zero, the surface acoustic wave propagation velocity (Upsilon[s]) is 2500 m/s or so, and the dielectric constant is 230 or so. The mechanical factor of merit (Q[m]) is 2000 or so, the surface acoustic wave electromechanical coupling factor (K[s]) is 0.18 or so, and the Curie temperature is 350 DEG C or so.