Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

2985 results about "Electrostatic adsorption" patented technology

Graphene/carbon black thermoplastic resin master batch with high dispersibility and preparation method thereof

The invention discloses a graphene/carbon black thermoplastic resin master batch with high dispersibility and a preparation method thereof. The graphene/carbon black compound in the master batch is formed in an electrostatic self-assembly manner, and comprises 10-50% of graphene, 5-20% of carbon black, 0.5-10% of surfactant, 10-65% of carrier resin and 2-10% of assistant. The preparation method comprises the following steps: (1) compounding and dispersing graphene by adopting the surfactant to control the positive electricity of the graphene surface; (2) forming a stable graphene/carbon black compound from the modified graphene and carbon black with positive electricity through electrostatic incorporation in a self-assembly manner; (3) preparing the graphene/carbon black thermoplastic resin master batch with high dispersibility by matching with a solution blended process, a melt-blending method and an in-situ polymerization method; (4) adding the assistant to extrude and pelletize, so as to prepare the graphene/carbon black/thermoplastic resin master batch particles after processing the master batch. By adopting the obtained master batch, the problems of difficult charging of graphene powder, uneven dispersion, dust pollution, unstable product performance and the like are solved.
Owner:XIAMEN KNANO GRAPHENE TECH CORP

Variable-frequency variable-pressure electronic type efficient air purifier

The invention discloses a variable-frequency variable-pressure electronic type efficient air purifier. The variable-frequency variable-pressure electronic type efficient air purifier comprises a primarily efficient filter screen positioned at the front end, wherein an insulating framework is arranged behind the primarily efficient filter screen; a PCB pin base, an ion emission pin and a grounding stainless steel plate are arranged in the insulating framework from front to rear in sequence; the ion emission pin is connected to a variable-frequency variable-pressure type ion generator; an ion air outlet which corresponds to the ion emission pin is arranged on the grounding stainless steel plate; a honeycomb type electrostatic electret filter screen is arranged behind the insulating framework; and the polarity of charge of the honeycomb type electrostatic electret filter screen is reverse to that of charge released by the variable-frequency variable-pressure type ion generator. The variable-frequency variable-pressure electronic type efficient air purifier realizes various functions of condensation, electrostatic adsorption, sterilization and fitness on fine particles in air, and also avoids obvious defects of high noises, much peculiar smell and high energy consumption of the conventional purifying technology.
Owner:ZHEJIANG GAODING PURIFICATION TECH CO LTD

Spray booth for automatically recycling spray mist through electrostatic adsorption

The invention relates to a spray booth for automatically recycling spray mist through electrostatic adsorption, in particular to a spray booth for automatically recycling and treating spray mist generated during spraying operation. The spray booth comprises an electrostatic spray gun, a paint bucket providing paint to the spray gun, an air compressor providing high-pressure air and an enclosure which is provided with a workpiece fixing device and provides operation space for spraying. The enclosure comprises four operation chambers, including a spray chamber, an electrostatic chamber and a fan chamber which run through each other in sequence along the spraying direction, and a recycle chamber which is positioned below the electrostatic chamber and runs through the electrostatic chamber. The operators in the spray booth need to be equipped with masks and inflated protective clothing so that the operators can not breathe the toxic gases in the spray booth and can not have occupational diseases. The spray booth solves the problem that the existing machines have low spraying efficiency, even spraying but high price, low manual spraying cost, flexible operation but heavy labor intensity, poor operation conditions, etc, and has the characteristics of spray mist reduction and environmental protection, reduction of damage to the bodies of the operators and the environment, reduction of waste of paint resources, simple operation, high efficiency, etc.
Owner:杭州腾赢工业设计有限公司

Method for preparing drug carrier based on magnetic carbon quantum dot/chitosan composite microsphere

The invention relates to a method for preparing a drug carrier based on a magnetic carbon quantum dot/chitosan composite microsphere. The method specifically comprises the following steps of: (1) carrying out a coprecipitation reaction on bivalent and trivalent iron salts in an alkaline aqueous solution so as to prepare nano magnetic ferroferric oxide; (2) carrying out microwave radiation reaction on a glucose and polyethylene glycol mixed solution to prepare carbon quantum dots, and forming magnetic carbon quantum dot composite particles through electrostatic adsorption; (3) reacting the chitosan which is dissolved in a mixed solution of sodium methoxide/absolute methanol with nitric oxide in a high-pressure kettle, and forming a chitosan-nitric oxide addition product; and (4) dropwise adding the magnetic carbon quantum dots into the addition product, and forming the magnetic carbon quantum dot/chitosan composite microsphere through electrostatic adsorption. Compared with the prior art, the method is simple, rapid, low in cost, and the prepared product can be developed into the drug carrier which integrates magnetic targeting, fluorescence imaging or tracing, nitric oxide in-situ release and fluorescence detection.
Owner:SHANGHAI JIAO TONG UNIV

Preparation of hyaluronic-acid-based double-targeting nano-composite medicament and application of double-targeting nano-composite medicament

The invention relates to a hyaluronic-acid-based double-targeting nano-composite medicament and a preparation method thereof. Hydrophobic group ursodeoxycholic acid is included in a hyaluronic acid nano-polymer structure and can form an amphipathic polymer and automatically generate micelles in an aqueous solution, and polyethylene glycol can be introduced into the micelles to improve the dispersity and stability of a composite. An anti-tumor medicament can enter a nano-carrier through electrostatic adsorption or physical inclusion to generate a nano-medicament composite, wherein the nano-medicament composite is selectively concentrated in a tumor cell under an active targeting effect of hyaluronic acid and a surface CD44 receptor of a tumor cell, and promotes a tumor tissue to absorb the nano medicament-carrying composite by using a passive osmotic accumulation effect (EPR) at the same time. After an anti-tumor medicament is wrapped by a modified hyaluronic acid polymer, the anti-tumor medicament has the advantages of improving the bioavailability of the medicament, improving the targeting property, reducing the toxic and side effects, prolonging the half-life period of the medicament, being stably stored and the like, so that the tumor targeting therapy efficiency is improved in many ways.
Owner:XIAMEN UNIV

Preparation method for graphene/polyvinyl chloride composite material

ActiveCN103804553ASolving affinity issuesEvenly dispersedEmulsionIn situ polymerization
The invention discloses a preparation method for a graphene/polyvinyl chloride composite material. The preparation method comprises the following steps of (1) anchoring an azo initiator on the surface of graphene through electrostatic adsorption; (2) preparing graphene emulsion, namely cooperatively dispersing and stabilizing the graphene under mutual action caused by molecular structures of a dispersing agent and an emulsifier, so as to obtain uniformly dispersed graphene emulsion through a high-speed stirrer; (3) initiating polymerization on the surface of the graphene by adopting an in-situ polymerization method to generate polyvinyl chloride, and preparing a polyvinyl chloride-cladded graphene composite material; and (4) post-treating graphene/polyvinyl chloride resin slurry. According to the preparation method, the process is simple; under the complexing cooperation action of in-situ anchoring modification and a surfactant, the compatibility of a graphite powder body and the polyvinyl chloride is improved from multiple aspects, so that the composite material with the high performance is obtained; the preparation method can be widely applied to materials such as building materials, packaging materials and medical materials, and the graphene/polyvinyl chloride composite material can be used as a novel upgrading replacement product for a conventional composite material.
Owner:XIAMEN KNANO GRAPHENE TECH CORP +1

Detecting micro-needle with strengthened Raman and fluorescence signal and preparation method thereof

The invention discloses a detecting micro-needle with a strengthened Raman and a fluorescence signal and a preparation method of the detecting micro-needle. The detecting micro-needle is characterized in that a medical acupuncture needle is used a basis for preparation. A metal nanometer material layer and a high molecular material layer with a strengthened Raman and a fluorescence signal cover the surfaces of the needle body and the needle tip part of the micro-needle. The detecting micro-needle structure comprises a micro-needle with a mercapto and amination surface, a metal nanoparticle layer and a high molecular material layer. The metal nanoparticles with a diameter of 20-1000nm coat the surface of the acupuncture needle by a covalent bond or a static adsorption effect. The high molecular layer covers the protecting metal nanoparticles in the outmost layer. Raman and fluorescence detection of in vitro samples and sampling and minimally invasive sampling and Raman and fluorescence detection in organism can be carried out based on the features of the detecting micro-needle. A novel rapid and super-sensitive detecting method for in vivo and in vitro experiment research, clinical diagnosis and large sample screening is provided by the invention.
Owner:SOUTHEAST UNIV

Intelligent ventilation and purification window

InactiveCN103939001AImprove purification efficiencyAvoid the disadvantages of not being able to open the windowCombination devicesLighting and heating apparatusConductive coatingAir purifiers
The invention discloses an intelligent ventilation and purification window. The intelligent ventilation and purification window comprises aluminum alloy window borders, double-layer glass and widow rolling wheels, wherein the inner side of the double-layer glass is plated with a conductive coating, the double-layer glass is arranged inside the aluminum alloy window borders, an outdoor air inlet air grid towards outdoors, an indoor air outlet air grid towards indoors and an indoor air inlet air grid are arranged on the aluminum alloy window borders, the outdoor air inlet air grid and the indoor air inlet air grid are arranged oppositely, and are separated by an interlayer, and a multifunctional efficient filter screen is arranged on the inner side of the outdoor air inlet air grid. According to the intelligent ventilation and purification window, an air purifier is embedded into a traditional window, and a modularized simple installation mode is achieved on the premise that an original building window frame is not changed; by fully making use of an internal space structure of an aluminum alloy window, a fan and an air filtering device are creatively integrated in the window borders on the two sides, the natural interlay formed by the double-layer glass with the inner side plated with the conductive layer serves as a sedimentation pole of an electrostatic adsorption device to carry out secondary treatment on filtered outdoor air, and purification efficiency is greatly improved.
Owner:黄兆东

Clay-resistant polycarboxylate water reducer and preparation method thereof

ActiveCN102923989AControlling slump loss performanceImprove stabilityPolyethylene oxideSide chain
The invention discloses a clay-resistant polycarboxylate water reducer and a preparation method of the clay-resistant polycarboxylate water reducer. The water reducer comprises the following components by weight: 35-45% of unsaturated polyoxyethylene ether monomer I, 40-50% of unsaturated polyoxyethylene ether monomers II, 10-20% of unsaturated monocarboxylic acid and derivative monomer of unsaturated monocarboxylic acid, 5-15% of unsaturated alkenyl sulphonate, and the like, wherein the unsaturated polyoxyethylene ether monomers I, the unsaturated polyoxyethylene ether monomers II, the unsaturated monocarboxylic acid and the derivative monomers of the unsaturated monocarboxylic acid, the unsaturated alkenyl sulphonate and the like are mixed and copolymerized, and then neutralized by polyethylene polyamine which is 0.5-2.0% of total monomer weight. The polyethylene oxide alkenyl short side chain of the water reducer can enhance the stability of the solvation water membrane layer on the surface of mineral fine powder particles in concrete; carboxyl groups and sulfonic groups generate electrostatic adsorption to prevent the adsorption and water absorption expansion rate of internal structures between clay layers; and polyethylene polyamine chains are adsorbed on the surfaces of clay particles to have shielding and scattering functions, therefore, the problem that the polycarboxylate water reducer and overlarge mud content in a concrete material are incompatible can be solved effectively.
Owner:北京榆构有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products