153 results about "Polymer brush" patented technology

The invention relates to the technical field of lithium battery polymer solid electrolyte materials, and discloses a high-pressure-resistant in-situ polymerization quasi-solid electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out esterification reaction on bacterial cellulose and 2-bromoisobutyryl bromide to obtain bromine-modified bacterial cellulose, grafting a double-block polymer side chain on the surface of the bromine-modified bacterial cellulose to obtain a one-dimensional polymer brush, and preparing a one-dimensional polymer brush film; a one-dimensional polymer brush film is used as a supporting film, an in-situ polymerization precursor solution is dropwise added to the surface of the supporting film, and the high-pressure-resistant in-situ polymerization quasi-solid electrolyte film is obtained through in-situ ring opening polymerization. The prepared high-pressure-resistant in-situ polymerization quasi-solid-state electrolyte membrane has excellent mechanical performance, the thickness of polymer electrolyte can be reduced, and growth of lithium dendrites can be inhibited; the rich pore structure is beneficial to rapid transmission of lithium ions; and the block in the side chain is beneficial to lithium ion transmission and lithium metal uniform deposition, and improves the stability of the electrolyte membrane in a high-voltage environment.

The invention discloses an artificial SEI material and a preparation method thereof, an artificial SEI film and an artificial SEI film modified negative electrode. The artificial SEI material is an organic polymer brush (CNF-g-PSSX) prepared by grafting cellulose nanofibers with polystyrene sulfonate. The polymer brush is of a crystal structure and has a firm framework; and the side chain of polystyrene sulfonate has rich-SO3 functional groups which are matched with cations in sulfonate, so that a rapid ion transmission channel is provided, high-current-density circulation can be realized, and good interface contact is ensured. Due to a special molecular topological structure and a multi-component synergistic effect, when the organic polymer brush forms an artificial SEI film, high mechanical strength, high ionic conductivity and low interface impedance can be obtained at the same time, and through strong electrostatic repulsion between a negatively charged-SO3 group and the surface of a negatively charged lithium dendrite tip, the electrochemical performance of the artificial SEI film is improved. An obvious inhibition effect is shown on the continuous growth of dendritic crystals.

The present disclosure provides methods for forming polymer brushes on Si and C-based - particles, thus, enabling easy large-scale production of polymer brush decorated particles. In particular, the improved methods allow for easy control of the graft-density due to the formation of a multifunctional layer on the particles. The disclosure also provides a Si and C-based - particle having a multifunctional base layer as well as a Si and C-based particle having a multifunctional base layer upon which polymer brushes are formed.

The invention discloses a preparation method of Fe3O4 magnetic nanoparticles rich in carboxyl groups on the surface, which comprises the following steps: modifying Fe3O4 nanoparticles by using polyethylene glycol and silicon dioxide to enhance the dispersity and biocompatibility of the magnetic nanoparticles, modifying the surfaces of PEG-Fe3O4 coated SiO2 nanoparticles by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface, and modifying the magnetic nanoparticles rich in carboxyl groups on the surface by using a silane coupling agent containing silane groups and unsaturated double bonds to obtain the magnetic nanoparticles rich in carboxyl groups on the surface. Then octavinyl-POSS and double bonds on the surfaces of the nano particles are subjected to click modification to form an octahedral cage, 4-mercaptobenzoic acid and double bonds are further subjected to click modification, the surfaces of the nano particles are rich in carboxyl, and a polymer brush rich in carboxyl is constructed. Compared with a conventional streptavidin coupling method, a high-density polymer chain provides a large number of carboxyl active binding sites, so that the streptavidin coupling amount is increased, the antibody coupling rate is increased, and a solution is provided for applications such as high-sensitivity biological detection, efficient targeted drug delivery and stable immunoassay.

The application belongs to the technical field of membrane separation materials, and discloses an ultrahydrophilic oil-water separation membrane, a preparation method and application thereof, and comprises the following steps: 2-(2-bromoisobutyryloxy)ethyl methacrylate monomers are prepared from 2-hydroxyethyl methacrylate and 2-bromoisobutyryl bromide, and a polymer with an atom transfer radical polymerization initiator is prepared through a free radical polymerization reaction; the polymer with the atom transfer radical polymerization initiator and polyacrylonitrile are dissolved into a solvent, and a PAN / P(AN-g-BIEM) blended membrane is prepared through a non-solvent induced phase separation method; and a hydrophilic polymer brush is grafted to the surface of the PAN / P(AN-g-BIEM) blended membrane to obtain the ultrahydrophilic oil-water separation membrane; the ultrahydrophilic oil-water separation membrane prepared by the application has a high separation flux, excellent oil-water separation efficiency and separation performance for different oil-in-water emulsions.

The invention discloses a DA bond polymer with antibacterial and self-repairing functions for a wood surface as well as a preparation method and a use method of the DA bond polymer. Chitosan serves as a wall material, cinnamon essential oil serves as a core material, the cinnamon essential oil and chitosan antibacterial microcapsules are prepared through emulsification, crosslinking and spray drying, and essential oil controlled release is achieved. Then bisphenol A diglycidyl ether DGEBA and furfuryl alcohol FA are used as raw materials, furyl functional epoxy resin FER is prepared under the catalysis of triethylamine TEA, bismaleimide BMI is added, and a DA bond self-repairing polymer is prepared through a DA reaction; and adding 4, 4-diaminodiphenylmethane DDM into the system, reacting with redundant DGEBA to generate a cross-linked polymer network, and adding the microcapsules into a DA bond semi-interpenetrating self-repairing network solution to obtain the DA bond polymer. A thin film formed by brushing and curing wood has antibacterial and self-repairing functions, scratches and microcracks on the surface of the wood can be repaired, and microbial erosion is inhibited.

The invention discloses a preparation method of a grafted polymer brush copolymer, which comprises the following steps: S1, mixing a styrene monomer, N-4-vinyl phenyl-N, N-dimethylamine, toluene and AIBN, heating, and reacting to generate a first section of polymer; and S2, mixing the first-section polymer with an acrylate monomer and an imide compound, and continuously reacting under an illumination condition to obtain the polymer brush copolymer. AIBN can be decomposed at high temperature to generate free radicals, polystyrene monomers are initiated to polymerize, and a first-section polymer is formed. The imide compound and a nitrogen-containing initiation site form a charge transfer complex under an illumination condition. The charge transfer complex can be dissociated to generate free radicals formed by nitrogen-containing initiation sites, and then the free radicals formed by the nitrogen-containing initiation sites initiate polymerization of acrylate monomers to obtain a grafted polymer brush copolymer. The preparation method is simple in reaction condition, simple and convenient to operate and suitable for industrial large-scale production.

The invention relates to the technical field of blood purification materials, in particular to a zirconium-titanium bimetal MOF hollow microsphere adsorbent and a preparation method and application thereof. The adsorbent is based on a Zr / Ti bimetallic node and a phosphonic acid-carboxylic acid mixed ligand, a composite MOF hollow microsphere structure with high stability and high specific surface area is constructed through a solvothermal and polymerization synergistic reaction in a water-in-oil suspension system, a phosphonic acid group and Zr are strongly coordinated to improve the stability of a framework, and the composite MOF hollow microsphere structure has a high specific surface area. The carboxylic acid group keeps the hydrophilicity of the pore channel; meanwhile, a cross-linked network of acrylamide and N, N '-methylene bisacrylamide penetrates through crystal gaps in the balling process, so that the material has excellent mechanical strength and fluid stability; and a sulphobetaine amphoteric polymer brush layer is constructed on the surface of the MOF through endogenous initiation point modification and surface in-situ controllable free radical polymerization technologies, so that protein adsorption and platelet adhesion are effectively inhibited, the blood compatibility is remarkably improved, and meanwhile, the channel accessibility is maintained to promote rapid diffusion and adsorption of bilirubin.

The invention provides a hydrophilic modified polytetrafluoroethylene oil removal film and a preparation method thereof. A modified layer of the hydrophilic modified polytetrafluoroethylene oil removal film is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of a hydrophilic vinyl monomer, 0.3-0.6 wt% of a cross-linking agent, 0.2-0.5 wt% of an initiator and the balance of a deionized water solvent. A new chemical grafting modification strategy is adopted, the surface of the PTFE membrane is activated through low-temperature plasma, co-grafting and cross-linking polymerization of a hydrophilic monomer and a cross-linking agent on the surface of the PTFE membrane are initiated, and a layer of firm hydrophilic polymer brush with a three-dimensional network structure is constructed on the surface of the membrane; a stable hydration layer is formed on a membrane-water interface, the PTFE membrane is endowed with excellent underwater super-oleophobic property, the oil-water separation efficiency, flux and anti-pollution capacity of the PTFE membrane are remarkably improved, the technological process is simple, and the product performance is stable.

The invention discloses organic-inorganic hybrid fluoride-free antifouling self-cleaning resin as well as preparation and application thereof, and belongs to the technical field of functional coating materials. According to the preparation method, MxGyPOSS is adopted as a molecular main body, a high-molecular flexible polymer brush is grafted through epoxy ring opening, then POSS-based fluoride-free antifouling self-cleaning resin is prepared through a'thiol-ene 'Michael addition reaction, and the obtained resin can be cured on different base materials after being mixed with a proper amount of a diamine curing agent. The obtained coating realizes the composition of hardness and flexibility, has excellent adhesion to various substrates, integrates the characteristics of antifouling and high transparency, and has certain reference significance for the development of materials in the field in the future.

The invention belongs to the technical field of lithium battery negative electrode interface modification, and discloses a multifunctional two-dimensional hybrid polymer artificial SEI membrane and a preparation method and application thereof. Comprising a compound as shown in a formula I, a polymer brush is grafted on the surface of brominated graphene oxide through atom transfer radical polymerization (ATRP), monomers of the polymer brush are carboxyl-containing monomers and fluorine-containing monomers, and the artificial SEI membrane is constructed through spin coating and membrane forming. The multifunctional artificial SEI film provided by the invention has the structural and functional characteristics of two-dimensional graphene oxide and in-situ reaction type macromolecules, the mechanical property of the film can be remarkably improved by an accumulated two-dimensional skeleton, the Young modulus can reach 3.7 GPa, the growth of lithium dendrites is inhibited, and the performance of the film is improved. Functional groups (carboxyl and fluoro) in the hybrid polymer brush and lithium metal are subjected to in-situ chemical reaction, so that the electrode interface stability and the lithium deposition uniformity are improved, and the hybrid polymer brush has wide application prospects in the field of lithium batteries.

The invention provides a thermo-sensitive triblock copolymer with a lateral group containing polyethylene glycol and a preparation method of the thermo-sensitive triblock copolymer, and relates to the field of polymer synthesis. The preparation method comprises the following steps: carrying out a reaction on hydroxyl-terminated polyether PAGE and single carboxyl-terminated polyethylene glycol monomethyl ether (mPEG-COOH) under the action of N-bromosuccinimide to prepare a polymer brush PAGE-g-mPEG; and reacting the polymer brush PAGE-g-mPEG with poly (N-isopropylacrylamide) to generate a thermo-sensitive triblock copolymer of which the side group contains polyethylene glycol. The thermo-sensitive triblock copolymer disclosed by the invention is endowed with good biocompatibility, hydrophilicity and low-temperature performance, has a good thermo-sensitive characteristic, and can be widely applied to the fields of drug-loaded controlled release, sewage treatment and nanoparticles; the invention also provides a preparation method of the thermo-sensitive triblock copolymer, which overcomes the defects of harsh reaction conditions and easy chain extension reaction, and realizes accurate control of the molecular weight of the prepared copolymer.

The invention relates to the field of polymer composite materials and functional films, and provides a cast film for a lithium ion battery, which is characterized in that the cast film is of a laminated composite structure, and the laminated composite structure comprises a support layer and an interface functional layer; the supporting layer comprises polymer fibers and boron nitride nanosheets which are dispersed in a three-dimensional network of the polymer fibers in a highly oriented manner; wherein the included angle between the plane normal direction of the boron nitride nanosheet and the thickness direction of the cast film is less than 30 degrees; the interface functional layer comprises a hyperbranched polymer matrix and LLZO nanowires which are distributed in the hyperbranched polymer matrix in a gradient manner; the surface, deviating from the supporting layer, of the interface functional layer is grafted with a zwitterionic polymer brush through chemical bonding; wherein the surface density of the LLZO nanowire is gradually reduced from the surface, grafted with the zwitterionic polymer brush, of the interface functional layer to the direction of an interface combined with the supporting layer; the cast film has good electrochemical performance, interface stability and safety performance.

The application relates to the technical field of shoe sole materials, in particular to a foamed composite material and application of the foamed composite material in shoe materials, which comprises EVA resin, ethylene-propylene-diene rubber, wear-resistant particles, a filler, a foaming agent, a crosslinking agent, a lubricant and an activator; wherein the wear-resistant particles are modified porous corundum, which is obtained by in-situ ring-opening polymerization of flexible PCL chains in and outside the pores of the porous corundum after surface activation; and the flexible PCL chains further have polyethylene glycol-stearic acid polymer brushes. Compared with the prior art, the application has the beneficial effects that: the EVA provides good processability and elasticity, the ethylene-propylene-diene rubber endows the material with excellent low-temperature performance and aging resistance; the corundum core of the modified porous corundum provides a high-hardness wear-resistant framework, significantly reduces the abrasion amount in a unit volume, the polycaprolactone main chain and the polyethylene glycol-stearic acid side chain compensate the rigidity of the corundum, and guarantee the high resilience, especially the low-temperature resilience, of the EVA material.

The invention discloses a medicinal glass bottle and a forming process thereof, and belongs to the technical field of medical materials, the medicinal glass bottle comprises a glass bottle body and a composite coating on the inner wall of the glass bottle; the forming process comprises the following steps: 1) pretreating the glass substrate; 2) constructing a composite layer; 3) constructing a barrier layer; and 4) cross-linking inerting and post-processing. According to the inner wall coating designed by the invention, a sandwich structure is adopted, and strong adhesive force of a bottom layer is realized through amino silane; the silver nanoparticles are anchored in situ by using a branched polyethyleneimine network, so that stable antibiosis is realized; a compact zwitterionic polymer brush is constructed on the outermost layer through surface-initiated polymerization, and a super-hydrophilic and biologically inert surface is provided; and finally, through cross-linking inerting treatment, the stability and safety of the coating are greatly improved. The problems of medicine adsorption, microorganism breeding, coating instability and the like of a traditional packaging material are solved, and a safe and reliable novel solution is provided for medicine packaging.

This application discloses a nanovesicle, its preparation method, and its application. The nanovesicle includes a core layer containing hemostatic active ingredients; first, second, third, and fourth intermediate layers (collectively forming a shell); and an outer layer (corona). The first intermediate layer is composed of a pH-sensitive polymer material, sensitive to the absolute value of transmembrane pH difference; the second intermediate layer is composed of a hypoxia-sensitive lipid complex; the third intermediate layer is composed of an osmotic pressure-sensitive phospholipid bilayer, sensitive to the absolute value of transmembrane osmotic pressure difference; the fourth intermediate layer is composed of an inflammatory factor / reactive oxygen species-sensitive hydrogel; and the outer layer is composed of a bifunctional polymer brush possessing both temperature difference response and mechanical difference sensing capabilities. This nanovesicle can respond to multidimensional microenvironmental differences between the intravascular and extravascular sides at the bleeding point, orderly disintegrating and releasing hemostatic active ingredients, providing a feasible technical approach for developing precise hemostasis strategies that do not rely on activation of the systemic coagulation system.

Disclosed herein are microfluidic assay devices that have improved versatility and reliability. An example microfluidic assay device includes a cassette having a body formed by a plurality of layers. The body includes a reaction chamber having an inlet, an outlet downstream from the inlet, and a non-fouling polymer brush with a plurality of assay reagents. The reaction chamber is configured to house a fluid sample. The body also includes a seal disposed adjacent the outlet of the reaction chamber for preventing fluid flow through the outlet, and an actuator configured to break the seal upon actuation to create a fluid flow path for the fluid sample to exit from the outlet of the reaction chamber.

The utility model relates to the technical field of cosmetic brush production, in particular to a polymer bristle cleaning device for cosmetic brush production, which comprises a support leg, a cleaning mechanism is arranged on one side of the support leg, the cleaning mechanism comprises a mounting plate, a hollow plate and a mounting box are arranged on one side of the mounting plate, and a nozzle and a connector are arranged on two sides of the hollow plate. According to the polymer bristle cleaning device for cosmetic brush production, the effect of washing a brush is achieved through cooperative use of a hollow plate and a spray head, the effect of controlling the air temperature is achieved by adding a compressor, the effect of controlling the air direction is achieved through cooperative use of a first motor and fan blades, and the effect of conveniently cleaning and collecting impurities is achieved by adding an electrostatic rod; by means of the structure, the brush can be used for cleaning more thoroughly.

The invention relates to the technical field of blood purification, and particularly discloses resin for adsorbing cell factors and a preparation method of the resin. The invention relates to a resin for adsorbing cytokines, which is a composite microsphere with a core-shell structure, a core layer is a porous polystyrene-divinyl phenyl body, and a phenylboronic acid functional group is covalently bonded on the core layer; the shell layer is a zwitterionic polymer brush grafted outside the core layer through surface-initiated atom transfer radical polymerization; the preparation method comprises the following steps: synthesizing porous polystyrene-divinyl benzene microspheres, and fixing chloromethyl on the skeleton of the microspheres to obtain a macromolecular initiator; reacting the macromolecular initiator with a compound containing phenylboronic acid groups, and covalently immobilizing the phenylboronic acid groups on the microsphere matrix; the microsphere matrix and the zwitterionic monomer are subjected to surface-initiated atom transfer radical polymerization reaction, and the zwitterionic polymer brush is formed on the surface of the microsphere. The resin provided by the invention has the advantages of high selectivity, high adsorption capacity and excellent blood compatibility.

The invention relates to a high-solid-content preparation method of a cyclic polymer brush. According to the preparation method disclosed by the invention, electrostatic mediation is utilized to realize intramolecular closed loop of the linear polymer brush, so that the preparation of the annular polymer brush under high solid content is realized; the method can be applied to various monomer systems, is high in universality, simple to operate, high in solid content, high in reaction efficiency and extremely low in by-product content, can realize preparation of the cyclic polymer brush without a complicated separation process, and has extremely high industrial application prospects.

A polymer of structure (A) with two end group R3p, and R4p, and a polymer chain (R) which has either repeat units of structures (Ip) or (IIp). R3p, is either a C-1 to C-8 alkyl, a moiety of structure (IIIp), or a moiety of structure (IIIpI). R3p is a C-1 to C-8 alkyl if the repeat unit is (IIp). R3p is structure (IIIp) or structure (IIIp1) if the repeat unit has (Ip). R4p is either a terminating moiety such as H, a moiety of structure (IVp), a moiety of structure (IVp1), or a moiety of structure (IVp2). R3p and R4p cannot respectively, both simultaneously, be moieties of structure (IIIp) and (IVp), simultaneously be moieties of structure (IIIp) and (IVp1), or simultaneously be moieties of structure (IIIp) and (IVp2). The polymer of structure (A) must contain, one grafting end group moiety selected from structures (IIIp), (IVp), (IVp1) or (IVp2). Composition of this with a solvent are used in DSA processing.

A random terpolymer of N-(2-hydroxypropyl) methacrylamide, carboxybetaine methacrylamide and sulfobetaine methacrylamide, and a polymer brush and to a functionalized polymer brush containing this terpolymer are disclosed. The random terpolymer increases the resistance of the substrate surface to non-specific adsorption of substances from biological media and / or to non-specific interaction with biological media components, and is suitable for use in the form of a polymer brush, for example in sensors or membranes.

The present application relates to the preparation field of organic polymer monolithic column, in particular to a kind of double-continuous supermacroporous cellulose / polystyrene composite monolithic column and its preparation method and application.Firstly, O / W Pickering emulsion is prepared using modified cellulose nanocrystal (CNC), and Janus CNC-PS with single side grafted polystyrene (PS) polymer brush is prepared by electron activation regeneration-atom transfer radical polymerization (AGET-ATRP) reaction system, and double-continuous phase emulsion gel (Bijel) is prepared by one-step stirring method using Janus CNC-PS with different HLB values as stabilizer.Then, double-continuous supermacroporous cellulose / polystyrene composite monolithic column is obtained by in-situ active polymerization through AGET-ATRP reaction using Janus CNC-PS as macromolecular initiator and Bijel as emulsion template.The obtained monolithic column has uniform skeleton structure, double-continuous skeleton and pore, high mechanical strength, and the unmodified side of CNC covers the outer surface of skeleton, so that the pore surface has hydrophilicity and is easy to modify.The monolithic column effectively overcomes the defects of current polymer monolithic column, such as poor biocompatibility, low mechanical strength and low specific surface area, and has great application potential in the field of enzyme and cell immobilization and biomacromolecule separation and analysis.

The invention belongs to the technical field of biomedicine, and particularly relates to a preparation method of a potassium K < + > recognition response quartz crystal microbalance chip and a blood potassium concentration quantitative detection method. A 3-aminopropyltriethoxysilane (APTES) solution is used for carrying out functionalization treatment on the surface of a silicon dioxide sheet, so that a large number of amino functional groups are obtained on the surface of the silicon dioxide sheet. The preparation method comprises the following steps: taking 4-acrylamide benzene-15-crown-5 as a template, then anchoring an ATRP (Atom Transfer Radical Polymerization) initiator-bromoisobutyryl bromide on the surface of the template through a covalent bond, and carrying out grafting construction of a benzene-15-crown-5 functional polymer brush by adopting Cu0-mediated surface-initiated atom transfer radical polymerization (Cu0-SI-ATRP) by taking 4-acrylamide benzene-15-crown-5 as a polymeric monomer. The potassium selective quartz crystal microbalance based on the crown ether functionalized polymer brush is obtained.

The invention discloses a polymer brush with a nanoscale microphase separation structure, a polymer film and a preparation method of the polymer film, the polymer brush comprises a liquid crystal unit, and the preparation method comprises the following steps: reacting the liquid crystal unit with halogenated alcohol to prepare a liquid crystal side chain; reacting the liquid crystal side chain with norbornene dianhydride to prepare a liquid crystal monomer containing carboxyl at the tail end; reacting the liquid crystal monomer containing carboxyl at the tail end with fatty alcohol or difatty glyceride to obtain a block type liquid crystal monomer; and carrying out ring-opening metathesis reaction on the block type liquid crystal monomer under the action of a Grubbs catalyst to prepare the polymer brush. The introduction of the liquid crystal unit provides stronger driving force for microphase separation of the brush polymer, so that the nanoscale microphase separation structure can be directly obtained through an annealing process under the condition of not adding any guide layer.

The invention discloses a preparation method of high-dispersity pigment carbon black, which comprises the following steps: S1, carrying out heat treatment on original carbon black under the protection of inert gas to obtain surface-activated carbon black; s2, carrying out heating reaction on the carbon black and grafting molecules to obtain functional carbon black of which the surface is grafted with specific active groups after the reaction; s3, dispersing the carbon black in an organic solvent, firstly adding an olefin pyridine monomer to carry out substitution reaction, then adding a functional monomer containing a dynamic covalent bond to carry out polymerization reaction, and forming a polymer brush on the surface of the carbon black; and S4, carrying out post-treatment to obtain the high-dispersity pigment carbon black. According to the preparation method, high steric hindrance and solvation rejection are given to the carbon black through a covalent anchoring-polymer brush structure, the sedimentation rate of an alcohol ester system is smaller than 5%, and long-term thermal aging stability is maintained by virtue of a stress relaxation mechanism of a dynamic disulfide bond; the harsh requirements of high-end printing ink, high-solid-content coatings and polymer master batches on high blackness, low sedimentation and durability can be met.

The application discloses an oily structural color pigment ink and application thereof, and belongs to the technical field of photonic crystal material preparation. Components of the oily structural color pigment ink include at least one block polymer brush, at least one resin or at least one precursor of the resin, and at least one organic solvent. The oily structural color pigment ink provided by the application is a layered structural color material obtained by self-assembly based on the microphase separation principle of the block polymer brush. The provided oily structural color pigment ink can be compatible with most common pigment coloring methods, including but not limited to screen printing, spraying, inkjet printing and intaglio printing. The structural color of the oily structural color pigment ink is not limited to the visible light band, and covers ultraviolet spectrum, visible spectrum and infrared spectrum, and the wavelength range of the covered electromagnetic spectrum is 200 nm to 2000 nm.

The invention relates to the technical field of membrane separation, and discloses a high-protein milk concentration process based on a membrane filtration technology, the process adopts an electric response membrane grafted with an electric response polymer brush on the surface, and an electric control zymogen modified by genetic engineering is added into milk feed liquid to be treated. The zymogen is modified with an electric field responsive anchoring group and an electric signal activated ferrocene protecting group. In the filtering stage, a first electric field is applied to stretch the polymer brush, so that anti-pollution filtering is realized; and in the cleaning stage, switching to a second electric field to enable the polymer brush to shrink and drive the zymogen to be anchored on the surface of the membrane, and applying an activation pulse to trigger the activity of the zymogen so as to degrade pollutants in situ. On the premise of not interrupting production, not adding chemical cleaning agents and not damaging target product protein, milk concentration is efficiently and continuously carried out, and long-term stable high permeation flux is maintained.

The invention relates to the field of cable insulating materials, in particular to a double-layer network heat-conducting composite insulating material for cables and a preparation method thereof.The material comprises an inner heat-conducting layer, a transition layer and an outer insulating layer, and in the inner layer, a three-dimensional heat-conducting network is built through a vertically-oriented boron nitride nanotube and reduced graphene oxide-boron nitride nanosheet heterostructure; flexible polymer brush grafted nanoparticles are introduced into the transition layer, so that thermal mismatch is relieved; and the outer layer is cooperated with GO-QDs by coating Al2O3 with a temperature response polymer, so that high-temperature interface self-enhancement and electron trap effects are realized, and the breakdown strength is greater than or equal to 45kV / mm. The material disclosed by the invention has the performance retention rate gt after being aged at 180 DEG C and 35 kV for 1000 hours; and meanwhile, the thermal resistance is reduced by more than or equal to 75%, the tensile strength is improved by more than or equal to 50%, the service life is remarkably prolonged, and the insulating material can be widely applied to insulation of electric automobiles and ultrahigh-voltage cables.

The present invention relates to a capillary core, an evaporator, a loop heat pipe, a cooling device, an electronic device, and a capillary core manufacturing method. The present invention aims to provide a capillary core, an evaporator, a loop heat pipe, a cooling device, an electronic device, and a capillary core manufacturing method that can improve the long-term stability of the hydrophilicity of the capillary core. The capillary core of the present invention is a capillary core of a porous elastomer that is permeated by a working fluid in a liquid phase, which is provided inside an evaporator that changes the working fluid in the liquid phase to a gas phase. The porous elastomer includes composite voids having communication holes at portions where a plurality of spherical voids partially overlap each other. The surface of the voids of the porous elastomer is coated with a hydrophilic polymer having a betaine group and a molecular weight of 10,000 or more of a polymer brush structure.