111results about How to "Well buried" patented technology

The present invention specifically adopts a simple method for preparing a molecularly imprinted polymer and directly applies the molecularly imprinted polymer to the extraction separation of trace substance in the complex sample pre-processing. The invention adopts a chemical coprecipitation method for preparing Fe3O4 magnetofluid. Then the surface of Fe3O4 magnetofluid is modified with oleic acid. The template molecules and functional monomers are realized with preassembling and are mixed with the cross linker and modified magnetofluid. Then the mixture is added into the polymer solvent containing dispersing agent. After the reaction is finished, magnetic field separation is executed. The polymer is dried after eluting the formwork molecules. A three-phase extraction system which is established on the base of magnetic molecularly imprinted polymer can be directly applied to the extraction separation of complex samples of food, environment and biological sample. The method of the invention has excellent selectivity and can eliminate the matrix interference in the sample. Furthermore as the polymer has excellent magnetism, the polymer can excellently realize the separation to the sample matrix after the extraction, and the polymer has broad application prospect in the complex sample pre-processing.

The invention provides high-flowability pregelatinized starch and a method for preparing the same by mechanical activation, which belong to the technical field of starch modification processing. The method comprises the following steps: uniformly mixing starch and a certain amount of flow aid in a high-speed mixer uniformly, pre-drying the starch by using heat generated in a high-speed mixing process, and controlling the water content in the starch to be lower than 15 percent; and placing the uniformly mixed materials in a ball mill containing a milling medium, well regulating the temperature for constant-temperature dissolution in water, performing mechanical activation for a certain time period, taking the starch out, and sieving the starch with a 80 to 100-mesh sieve. The method has the advantages of simple process and equipment, small investment, environmentally-friendly process, low production cost, easy product quality control and the like. The prepared product has the characteristics of high flowability, loose structure, uniform particles and precision control over pregelatinization degree and can be widely used in industrials and fields of foods, pharmaceuticals, chemicals and the like.

The invention relates to nanostructured lipid carrier loaded with phenylethyl resorcinol. The carrier is loaded with the active component phenylethyl resorcinol (SymWhite 377) and is characterized in that the nanostructured lipid carrier comprises the following compositions in percent by weight: 0.5%-2% of phenylethyl resorcinol, 2%-5% of a nemulsifier, 5%-10% of a composite lipid material and 83%-92.5% of deionized water. The invention also relates to a preparation method of the nanostructured lipid carrier. The invention also relates to a skin-care product or a cosmetic containing the nanostructured lipid carrier. The nonostructured lipid carrier has excellent stability and water solubility, the preparation method is simple and controllable and good in repeatability, and is applicable to preparation of cosmetic containing phenylethyl resorcinol.

In a semiconductor integrated circuit device, upon connection of an interconnection made of aluminum or aluminum alloy and another interconnection made of Cu or Cu alloy, a barrier conductor film or plug is disposed at the joint portion between these interconnections. Among the interconnection layers, the uppermost one is made of a wiring material such as aluminum or aluminum alloy, while the lower, one is made of Cu or Cu alloy. The lowest interconnection is made of a conductive material other than Cu or Cu alloy. For example, the conductive material which permits minute processing and has both low resistance and high EM resistance such as tungsten is employed.

The invention discloses a multi-stimuli responsive shell crosslinked polymeric micelle and a preparation method thereof. The polymeric micelle is prepared by: carrying out ATRP and click chemistry reaction to synthesize an amphiphilic diblock polymer with polydimethylaminoethyl methacrylate (PDMAEMA) as the hydrophilic chain and polymethacrylate ferrocenyl formyloxy ethyl ester (PMAFFEE) as the hydrophobic chain, subjecting the polymer to self-assembly in water to form core-shell micelles with uniform size, and then carrying out cross-linking reaction on the micelles and N, N'-di(bromoacetyl)cystamine. The core-shell crosslinked polymeric micelle provided by the invention is responsive to temperature, pH, light, oxidation and reduction stimuli, drugs can be released under single triggering of different stimuli in a controlled release process, and also can achieve controlled release through joint triggering of multiple stimuli. Therefore, the multi-stimuli responsive shell crosslinked polymeric micelle has broad application prospect in controlled release of anti-cancer drugs and other fields.

The invention discloses a preparation method of arabic gum hollow nanospheres. The method comprises the following steps: firstly preparing starch with short amylose by using a biological enzyme method, adding arabic gum into the short amylose to coat and form starch nanoparticles, then carrying out enzymolysis of the starch by using alpha-amylase to obtain the arabic gum hollow nanospheres. The preparation method of arabic gum hollow nanospheres is low in equipment requirement, simple in process, simple and convenient to operate, mild in reaction, short in reaction time and high in efficiency, and is suitable for large-scale production; the product performance is high; the particle size of the prepared arabic gum hollow nanospheres is 60-85nm; the ratio of diameter of core to diameter of shell can be controlled by adjusting the ratio of arabic gum to the short amylase, and the shell thickness controlling effect can be achieved; the preparation cost is low; the energy consumption is low; no hazardous waste is generated; the modern production requirements of green production, environment friendliness and energy economization can be met.

The invention discloses a lutein micro-capsule preparation, which adopts lutein as core material, adopts granulesten and sucrose ester as composite emulsifying agent and adopts gelatin and porous starch as composite wall material. The invention further discloses a preparation method id the lutein micro-capsule preparation. The lutein micro-capsule is obviously improved in water-solubility and stability, is high in bioactivity, and has more than 60% clearance rate on OH- and O2.-. Compared with free lutein the lutein micro-capsule can be directly dissolved in water, heat resistance and acid-base resistance are respectively improved by 50%, and illumination and oxygen resistance capability are respectively by 37% and 20%. Under the conditions of 100DEG C high temperature, 70% oxygen, high potential of hydrogen (PH1-PH12) and long-term illumination (reaching 30 days), retention rate of the lutein can still be maintained to more than 90%.

The invention belongs to the field of environmental science and engineering and discloses an aluminum-based MOFs/chitosan composite microsphere and a preparation method and application thereof. The problem is solved that the adsorption capacity is reduced after existing MOFs forming. An aluminum-based MOFs material MIL-68(Al) serves as a matrix, the composite microsphere coated with chitosan on the surface is obtained under the combined cross-linking action of sodium alginate and chitosan, the particle size of the microsphere is about 2 mm, and the microsphere is easy to separate and recycle from water. The preparation method is simple in operation process, relatively low in requirement on equipment conditions and easy to implement; the aluminum-based MOFs/chitosan composite microsphere can achieve the removal efficiency equivalent to that of powder MOFs, bisphenol A in a water body can be efficiently adsorbed and removed, and an adsorption material can be quickly separated and recycled from the water body.

The invention relates to a solar cell, and provides a method for preparing a polymer thin-film solar cell active layer through electrospinning, wherein by means of the method, full-spray-printing preparation of a donor material layer, a blending layer and an acceptor material layer can be completely at the same time. The method includes the first step of preparing an electrostatic spinning active layer solution, the second step of conducting lap joint on an electrospinning device and conducting preparation before entering a laboratory, the third step of preparing the donor material layer through electrostatic spraying, the fourth step of preparing a nanometer mesh-shaped porous structure of the blending layer through electrospinning, and the fifth step of preparing the blending layer and the acceptor material layer through electrostatic spraying. When the polymer thin-film solar cell active layer is prepared through the electrospinning technology, experimental equipment is simple, operation is convenient, material applicability is high, a prepared nanofiber membrane is high in specific surface area and is of a nanometer mesh-shaped porous structure, high mechanical strength is achieved, the contact area between a donor and an acceptor is greatly enlarged, and safety and circulating performance of the cell are improved.

The invention discloses a preparation method and application of a Chinese giant salamander phalanx section. A second joint of a Chinese giant salamander phalanx is used as a section material and is subjected to sampling, hardening, decalcification, section cutting, dyeing and dehydration hyalinization to prepare the Chinese giant salamander phalanx section. The second joint of the Chinese giant salamander phalanx, which is used as the section material, is longer and is more uniform in thickness compared with a first joint and a third joint, and thus the profile of the section can be easily fixed and observed; in the aspect of a dyeing method, the preparation method specifically adopts a combination of different steps according to the characteristics of steps of existing various dyeing methods, and thus the color development of the texture is clear; absolute ethyl alcohol soaking and xylene are additionally arranged, and the color development result is improved.

The invention relates to a process for preparing biodegradable spherical porous starch foam and a biodegradable spherical porous starch foam administration system for an insoluble medicament. The process adopts an emulsifying-freeze thawing combined solvent displacement method, and comprises the following steps of: performing high-speed stirring or homogenizing treatment (emulsion homogenizing machine) on starch-melted aqueous solution with certain concentration serving as a water phase, methylbenzene/chloroform mixed solution (or other emulsion oil phase) serving as an oil phase and Span80 (or other W/O emulsifying agent) serving as an emulsifying agent to form uniform W/O emulsion, standing the emulsion for certain time at the temperature of 20 DEG C below zero, demixing the emulsion by gelling, dehydrating the layers in turn by adopting balance of aqueous solution of methanol with different concentrations, separating and removing the methylbenzene/chloroform layer by adopting a separating funnel, balancing the solution by using anhydrous ethanol, filtering the solution, and drying the filtrate with vacuum to obtain the biodegradable spherical porous starch foam. The foam material suitable to be used as an insoluble medicament carrier increases the specific surface area and water solubility of the insoluble medicament, and finally improves the bioavailability of the insoluble medicament.

The invention discloses a fast preparation method of a nanometer particle gel medicine carrying system. Poly gamma-glutamic acid, Chitosan oligosaccharide, hyaluronic acid, nanometer particles, rhamnolipid and crosslinking agents EDC/NHS are used for preparing gel; under the catalytic effect of crosslinking agents, intermolecular crosslinking reaction is performed. According to the method provided by the invention, the hyaluronic acid is used as a catalyst to be matched with the rhamnolipid and the crosslinking agents EDC/NHS; the gel formation time can be effectively reduced, so that the gel has more excellent gel performance; high bioactivity performance and good biocompatibility are realized; the swelling properties are good; the raw materials are cheap; the obtaining is easy; the production process is simple.

The low concentration heavy metal removal method by sodium alginate embedding heat-activated activated sludge, which pertains to heavy metal waste water disposal method, comprises the following steppes: treating the activated sludge from municipal sewage plant with scouring, centrifugal separation and drying under pressurization to deactivate it; embedding it with sodium alginate(CaCl2) to get immobilization calcium alginate ball(CA); filling fixed reactor with CA in certain density; continuously treating low concentration waste water containing mixing heavy metal such as Cd2+, Pb2+, Cu2+ and Zn2+; and selectively washing CA ball by hydrochloric acid to get mixing heavy metal adsorbed on CA ball. Heavy metal is retained while sorbent material revived to reuse. The invention has the advantages of high efficiency and economical and practical property.

The invention relates to a double modified starch and its production process. According to the production principle a compound modification method can be adopted to make carboxymethyl and alkenyl succinic acid radical be combined on starch molecule to simultaneously add the hydrophilic carboxyl group and lipophilic alkenyl group on the starch molecular so as to produce the modified starch simultaneously having hydrophilic property and lipophilic property-carboxymethyl alkenyl succinic acid starch ester, its product solubility in cold water (said product can be dissolved in cold water with 15 deg.C) and lipophilic property can be raised, and the application range of said modified starch can be broadened.

The invention provides a microcapsule soft capsule preparation with a high alpha-linolenic acid content. The active ingredients of the preparation comprise high-content alpha-linolenic acid as the main nutritional ingredient and other nutritional ingredients such as oil-soluble nutritional ingredients and water-soluble nutritional ingredients, wherein the water-soluble nutritional ingredients are prepared into microcapsules by an encapsulating material. The alpha-linolenic acid content of the microcapsule soft capsule preparation with a high alpha-linolenic acid content provided by the invention is 50-60%. The microcapsule soft capsule preparation provided by the invention overcomes the defects of the existing preparations, effectively improves the stability of the product, reserves the contents of various nutritional ingredients, improves the bioavailability, reduces the dosage, flavors disagreeable tastes and has a better taste.

The invention provides a preparation method of an edible fresh-keeping film and an application of the film in material fresh-keeping. The edible fresh-keeping film uses collagen-chitosan as a film matrix. Camellia oil, milk powder and other health care substances are added to improve the nutritional value of the film. Glycerol, genipin, sucrose esters and the other film-forming promoters with medicinal effects are added, which effectively improves the health value and mechanical ability of the film prolongs the fresh-keeping time, and has the effects of multi-function, environmental protectionand the like. The film can be used for packaging various materials such as food, health care products, medicine and feed. Meanwhile, the film can be eaten together with packaged materials to providea health care effect.

The invention provides a prinsepia utilis royle fruit oil microsphere and a preparation method thereof. The prinsepia utilis royle fruit oil microsphere prepared by the preparation method is uniform in shape and has a smooth surface. The preparation method comprises the following steps: respectively preparing an acid-process gelatin (A type) homogeneous solution with pH being 4-5 and a hydroxy propyl distarch phosphate solution with pH being 4-5 by using an acetic acid solution (1%v/v) for later use; adding a compound emulsifier (containing monoglyceride and sucrose ester in a ratio being 1:8) into a certain volume of prinsepia utilis royle fruit oil under the stirring condition, stirring for 30 minutes and dropwise adding into the prepared gelatin solution, stirring and uniformly shearing to obtain a homogeneous emulsion; adding the prepared hydroxy propyl distarch phosphate solution into the emulsion, stirring, standing, centrifuging at the temperature of 25 DEG C and at a rotation speed of 10000rpm, drying at the room temperature and the negative pressure to obtain the prinsepia utilis royle fruit oil microsphere, wherein the coating is gelatin. The preparation method is mild in conditions, free of organic solvent and low in ionic concentration.

The invention discloses bacteriostatic paint and a production method thereof. The paint comprises the following components, in parts by weight, of 100-150 parts of phenolic resin, 100-150 parts of silicon dioxide aerogel, 50-80 parts of plant extracts, 50-60 parts of negative ion powder, 20-30 parts of nanometer titania, 30-40 parts of modified carbon nanotubes, 30-40 parts of graphene oxide, 20-30 parts of vitrified microspheres, 10-15 parts of chitosan, 3-5 parts of a surfactant, 3-5 parts of a bacteriostatic agent, 1-2 parts of a silane coupling agent and 1-2 parts of a levelling agent. Thepaint has the characters of being ageing-resistant, free from peeling and discoloration, high in weather resistance, non-toxic, odourless, good in levelling property and easy to apply, and is scrub-resistant, the original strength and quality of the paint can still be maintained after other functional components are added moderately, and the paint not only can release negative air ions for a longterm to purify air and to benefit human health, but also can restrain and sterilize bacteria.