36 results about "Polyglycidyl methacrylate" patented technology

The invention relates to the technical field of degradable plastics, and provides biodegradable plastic particles as well as a preparation method and application thereof. The biodegradable plastic particles comprise the following components in parts by weight: 50-80 parts of PLA, 20-50 parts of PBAT, 5-20 parts of a filler, 1-8 parts of a flexibilizer, 1-5 parts of a lubricant and 5-10 parts of a modifier. The modifier comprises a polylactic acid-polyethylene glycol block copolymer and a polycaprolactone-polyglycidyl methacrylate block copolymer in a mass ratio of (1: 19)-(19: 1). According to the technical scheme, the problems of poor flexibility and strength of plastic particles in related technologies are solved.

The invention discloses an interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material and a method. The interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material comprises a maleic anhydride grafted polypropylene matrix and a core-shell structure filler dispersed in the maleic anhydride grafted polypropylene matrix, the core-shell structure filler comprises hydroxylated boron nitride nanoparticles covalently grafted on a polymer shell layer on the surface of the core-shell structure filler; the polymer shell layer is polyglycidyl methacrylate; the epoxy group of the polymer shell layer reacts with the anhydride group of the maleic anhydride grafted polypropylene matrix to form a covalent bond. The invention has the characteristics of strong interface bonding force, uniform filler dispersion, and excellent comprehensive electrical properties and processability.

The invention relates to the technical field of biological nano materials, in particular to a superparamagnetic strong anion exchange magnetic bead for virus enrichment and a preparation method and application thereof. The invention discloses a superparamagnetic strong anion exchange magnetic bead for virus enrichment and a preparation method of the superparamagnetic strong anion exchange magnetic bead. According to the superparamagnetic strong anion exchange magnetic bead, polyglycidyl methacrylate magnetic microspheres serve as raw materials, firstly, a large number of amino groups are introduced through reaction of active epoxy groups and a multi-amino compound, and then abundant quaternary ammonium salt groups are introduced through reaction of amino groups and epoxy quaternary ammonium salt under the alkaline condition. Through two times of epoxy ring-opening reactions, while enough quaternary ammonium salt groups are introduced, a large number of hydrophilic hydroxyl groups are introduced to the surfaces of the magnetic microspheres, so that the hydrophilicity of the anion exchange magnetic beads is improved, and the anion exchange magnetic beads are high in enrichment efficiency and elution efficiency and good in application prospect when being applied to enrichment of viruses.

The invention relates to a strong cation exchange chromatographic filler as well as a preparation method and application thereof. The strong cation exchange chromatographic filler comprises sulfonated poly (glycidyl methacrylate)-divinyl benzene microspheres. The strong cation exchange chromatographic filler provided by the invention can simultaneously show excellent separation selectivity on rare earth elements, and also has long-term stability and excellent cycle performance, so that the economic cost is reduced, and the strong cation exchange chromatographic filler has relatively high economic benefits and is green and environment-friendly.

The invention relates to the technical field of preparation methods of biomimetic enzyme reactors, and particularly discloses a preparation method and application of a biomimetic enzyme aerogel reactor, and the preparation method specifically comprises the following steps: step S1, firstly preparing titanium dioxide nanofibers (TiNFs) through solvent heat treatment; step S2, carrying out freeze casting and vacuum drying on an aqueous dispersion containing titanium dioxide nanofibers (TiNFs), chitosan methacrylate (CSMA) and a cross-linking agent to obtain a bionic C / TiNFs aerogel reactor with vertically arranged channels; step S3, carrying out polymerization and modification on glycidyl methacrylate (GMA), methacryloylethyl sulfobetaine (SBMA) and an N, N '-methylene bisacrylamide (MBA) cross-linking agent on a skeleton of the simulated gas gel reactor; and step S4, covalently immobilizing tannase in the bionic gas gel reactor under a mild condition, so as to obtain the bionic tannase-pGSC / TiNFs enzyme reactor. The bionic tannase-pGSC / TiNFs enzyme reactor disclosed by the invention is composed of TiNFs, CSMA (Carboxymethyl Methacrylate), polyglycidyl methacrylate (PGMA), polymethylacryloyl ethyl sulphobetaine (PSBMA) and immobilized tannase, has vertically arranged channels, and can be used as a tissue cell reactor.

The invention discloses a degradable high-strength plastic bag and a preparation method thereof, and relates to the technical field of plastic bag preparation. The degradable high-strength plastic bag at least comprises the following raw materials in parts by mass: 40-60 parts of polylactic acid, 20-35 parts of poly (adipic acid) / butylene terephthalate, 5-15 parts of modified nano calcium carbonate, 3-8 parts of modified wood fibers, 6-8 parts of chitosan grafted polyglycidyl methacrylate nanoparticles, 0.5-2 parts of a lubricant, 0.3-1 part of an antioxidant and 2-5 parts of a degradation accelerator. And 0.5 to 1.5 parts of an ultraviolet stabilizer. According to the degradable high-strength plastic bag prepared by the preparation method disclosed by the invention, the polylactic acid and the poly (butylene adipate-co-terephthalate) are used as base materials, the modified nano calcium carbonate and the modified fibers are used as fillers, and the chitosan grafted polyglycidyl methacrylate nanoparticles are used as a compatilizer, so that the balance of high strength and degradability is realized; the prepared degradable high-strength plastic bag can be used as a high-performance flexible packaging material.

The invention relates to the field of all-solid-state battery material preparation, and particularly discloses a composite positive electrode binder and a preparation method thereof, a positive plate and a preparation method thereof, and an all-solid-state battery, the composite positive electrode binder comprises a first high polymer material and a second high polymer material, and the molecular weight of the high polymer materials is 104-106; the first high polymer material comprises at least one of poly (ethylene-methacrylate-glycidyl methacrylate), poly (ethylene-glycidyl methacrylate) and polyglycidyl methacrylate; the second high polymer material comprises at least one of hydrogenated nitrile butadiene rubber (HNBR), nitrile butadiene rubber (NBR), ethyl cellulose (EC), styrene butadiene rubber (SBR) and polyvinylidene fluoride (PVDF); the binder is rich in polar groups, can be easily dissolved in a non-polar solvent, and does not damage sulfide electrolyte. The prepared positive pole piece has the ion / electron conductivity higher than that of a traditional binder, a lithium ion transmission channel can be widened, and the cycle performance of the battery is improved.

The invention is applicable to the technical field of coatings, and provides a radiation-proof coating additive containing zeolite powder and a preparation method thereof, the additive comprises: a mineralized core: a heterostructure formed by thermal bridging of zeolite powder and tourmaline powder through zinc ion; the bioactive layer is a spirulina extract and sulfhydrylated zein compound loaded in pores of the inner core; the functional shell layer comprises a hydrogenated polyethyleneimine / boron carbide hydrogel layer and a tantalum disulfide / bismuth oxide gradient gamma shielding layer which are sequentially coated; an interface coupling agent is a polyglycidyl methacrylate-block-polydimethylsiloxane block polymer, a zeolite / tourmaline mineralized inner core is designed, tourmaline is spontaneously polarized to disperse charged particles, zeolite channels anchor gadolinium / boron to improve the absorption cross section and improve the seed shielding rate, and a spirulina extract is added to improve the free radical scavenging performance; sulfhydrylated zein is added, sulfydryl simulates the function of glutathione, and electron repairing of base damage and biocompatibility are provided.

The invention belongs to the technical field of biological separation and purification, and particularly relates to a strong anion exchange chromatography filler as well as a preparation method and application thereof. The surface of the porous polyglycidyl methacrylate-divinylbenzene microsphere is modified with a layer of branched polyethyleneimine, so that the hydrophilic property of the material is greatly improved, and the porous polyglycidyl methacrylate-divinylbenzene microsphere has good biocompatibility; the high-density branched polyethyleneimine is added into the filler, non-specific adsorption caused by hydrophobic interaction in the protein separation and purification process is avoided, and meanwhile, the high-density branched polyethyleneimine is convenient for modifying a high-density quaternary ammonium group, so that the surface charge density of the filler is greatly improved, and the protein adsorption capacity of the filler is improved.

The invention discloses a strong cation exchange chromatography medium as well as a preparation method and application thereof, and belongs to the technical field of biological separation and purification. The structural formula of the strong cation exchange chromatography medium is shown in the specification, the preparation method comprises the following steps: (1) synthesizing epoxy porous polymer microspheres; (2) carrying out an epoxy-sulfydryl click reaction with sulfydryl sulfonate; and (3) hydrolyzing the residual epoxy group to obtain the epoxy resin. The strong cation exchange chromatography medium has the advantages of high protein loading capacity, low non-specific adsorption, good mechanical property and the like, the preparation process is simple, special hydrophilic modification is not needed, and the process is simplified, the industrial production period is shortened and the production cost is reduced under the condition of meeting the conventional protein elution condition. And meanwhile, the high efficiency of the click reaction can meet the characteristics of high loading capacity, good biocompatibility and the like of the chromatography medium.

This invention relates to the field of functional fabric technology, specifically to a hybrid fiber with phase change temperature control fiber and its preparation method. The raw materials for preparing the hybrid fiber, by weight, consist of 70-80 parts polymer matrix, 13-21 parts phase change material, 3-5 parts polyethylene glycol-b-polyglycidyl methacrylate (PEG-b-GMA), 0.6-1.5 parts KH-580, 0.3-1 parts thermally conductive reinforcing phase, and 0.5-1.2 parts functional auxiliaries; the thermally conductive reinforcing phase is micron-sized boron nitride modified with a silane coupling agent using a wet process. This invention, through the synergistic effect of PEG-b-GMA and the anchoring agent KH-580, can simultaneously solve the problems of poor dispersion, easy leakage of phase change material, and poor mechanical properties in existing blended spinning phase change temperature control fibers. The improved fiber properties can meet the requirements of industrial weaving. This invention uses conventional blended spinning processes, requires no additional specialized equipment, has controllable auxiliary agent costs, is simple to operate, and is easy to implement on existing production lines.

The invention discloses a method for synchronously separating ovalbumin, ovotransferrin and lysozyme from egg white, which comprises the following steps: firstly, adsorbing ovalbumin from egg white loading liquid by taking chitosan-polybutyl methacrylate nanocrystal gel with an anion exchange function as a primary separation medium, and carrying out gradient elution to obtain ovalbumin; taking a primary separation loading effluent as a secondary separation loading solution; hydroxyethyl methylacrylate-polyglycidyl methacrylate nanocrystal gel with a cation exchange function is taken as a secondary separation medium to adsorb ovotransferrin and lysozyme from a secondary separation loading solution, gradient elution is performed by gradually increasing salt concentration, and separation of ovotransferrin and lysozyme is realized. The method provided by the invention can realize synchronous separation of ovalbumin, ovotransferrin and lysozyme, has the advantages of high separation efficiency, simplicity and convenience in operation, low energy consumption and the like, and is suitable for industrial large-scale production, and the separation medium can be repeatedly used.

The present invention relates to the technical field of degradable plastics, and proposes a biodegradable plastic particle and a preparation method and application thereof. The biodegradable plastic particles include the following components in parts by weight: 50-80 parts of PLA, 20-50 parts of PBAT, 5-20 parts of filler, 1-8 parts of toughening agent, 1-5 parts of lubricant, and 5-10 parts of modifier; the modifier includes a polylactic acid-polyethylene glycol block copolymer and a polycaprolactone-polymethacrylate glycidyl block copolymer in a mass ratio of 1:19-19:1. Through the above technical solution, the problem of poor flexibility and strength of plastic particles in the related art is solved.

A multi-layered film includes (A) an oxygen barrier layer; (B) a moisture barrier layer disposed on and in direct contact with (A) the oxygen barrier layer; and (C) an adhesive layer disposed on and in direct contact with (B) the moisture barrier layer. (A) The oxygen barrier layer includes (a) modified polyethylene resin and (e) ethylene-vinyl alcohol copolymer. (B) The moisture barrier layer includes (b1) first poly(ethylene-co-1-octene) having a melting index of 20 g / 10 min to 40 g / 10 min at 190° C. and (b2) second poly(ethylene-co-1-octene) having a melting index of 1 g / 10 min to 10 g / 10 min at 190° C. (C) The adhesive layer includes poly(ethylene-co-methacrylate-co-glycidyl methacrylate) having a melting index of 1 g / 10 min to 10 g / 10 min at 190° C.

The invention discloses modified magnetic powder and a preparation method thereof, magnetic slurry and a cured resin, and relates to the technical field of magnetic materials. The modified magnetic powder provided by the embodiment of the invention comprises magnetic powder and a coating layer, wherein the coating layer is a polyglycidyl methacrylate layer; the average thickness of the coating layer is 10 nm to 1 [mu] m. According to the modified magnetic powder disclosed by the embodiment of the invention, the magnetic powder body is coated with the polyglycidyl methacrylate layer, and the thickness of the coating layer is 10 nm to 1 mu m, so that the prepared modified magnetic powder has relatively good interface bonding force and insulativity; therefore, the magnetic slurry with the modified magnetic powder provided by the invention has better mechanical properties and magnetic properties after being cured. Meanwhile, an active functional group (such as an epoxy functional group) in PGMA can participate in a curing reaction of a resin matrix, so that the mechanical property of the cured material can be further improved.

The present invention relates to a laminate having a structure in which a fluororesin layer and a vinyl chloride resin layer are laminated with an adhesive layer in between, and provides a new laminate in which the composition of the adhesive layer can be improved to increase the delamination strength between the fluororesin layer and the vinyl chloride resin layer. [Solution] The laminate comprises a fluororesin layer with fluororesin as the main component resin, an adhesive layer, and a vinyl chloride resin layer with vinyl chloride resin as the main component resin, wherein the adhesive layer contains polyglycidyl methacrylate (PGMA), and the PGMA content is 20 to 60% by mass relative to 100% by mass of the resin constituting the adhesive layer.

The invention relates to preparation of carboxyl-functionalized superparamagnetic composite microspheres and application of the carboxyl-functionalized superparamagnetic composite microspheres in chemiluminescence immunodetection, the surfaces of the carboxyl-functionalized superparamagnetic composite microspheres are chemically modified with carboxyl functional groups, the carboxyl-functionalized superparamagnetic composite microspheres are coupled with an antibody to obtain immunomagnetic spheres, and the average particle size of the immunomagnetic spheres is 1.3-1.4 microns. The preparation method comprises the following steps: by taking glycidyl methacrylate as a monomer, preparing polyglycidyl methacrylate microspheres by adopting a dispersion polymerization method; after sulfonic acid groups are introduced to the surfaces of the microspheres, magnetic Fe3O4 nanoparticles are loaded through an in-situ precipitation method; coating the magnetic microspheres with silica gel; finally, a carboxyl functional group is introduced through surface polymerization. The microspheres are uniform in particle size, high in magnetic responsiveness, good in dispersion effect and high in stability. The microsphere can be used as a solid phase carrier in chemiluminescence immunoassay, realizes high-sensitivity and high-specificity chemiluminescence detection of a target object through EDC / NHS activation and antibody covalent coupling, can meet clinical use requirements, and has a wide application prospect in the field of biomedical detection.

A multi-layered film includes (A) an oxygen barrier layer; (B) a moisture barrier layer disposed on and in direct contact with (A) the oxygen barrier layer; and (C) an adhesive layer disposed on and in direct contact with (B) the moisture barrier layer. (A) The oxygen barrier layer includes (a) modified polyethylene resin and (e) ethylene-vinyl alcohol copolymer. (B) The moisture barrier layer includes (bi) first poly(ethylene-co-1-octene) having a melting index of 20 g / 10 min to 40 g / 10 min at 190° C. and (b2) second poly(ethylene-co-1-octene) having a melting index of 1 g / 10 min to 10 g / 10 min at 190° C. (C) The adhesive layer includes poly(ethylene-co-methacrylate-co-glycidyl methacrylate) having a melting index of 1 g / 10 min to 10 g / 10 min at 190° C.

The application discloses a degradable high-strength plastic bag and a preparation method thereof, and relates to the technical field of plastic bag preparation.The degradable high-strength plastic bag comprises the following raw materials in parts by mass: 40-60 parts of polylactic acid, 20-35 parts of polybutylene adipate terephthalate, 5-15 parts of modified nano calcium carbonate, 3-8 parts of modified wood fiber, 6-8 parts of chitosan grafted polymethyl methacrylate glycidyl ester nanoparticles, 0.5-2 parts of lubricant, 0.3-1 part of antioxidant, 2-5 parts of degradation accelerator and 0.5-1.5 parts of ultraviolet stabilizer.The prepared degradable high-strength plastic bag adopts polylactic acid and polybutylene adipate terephthalate as base materials, adopts modified nano calcium carbonate and modified fiber as fillers, and adopts chitosan grafted polymethyl methacrylate glycidyl ester nanoparticles as a compatibilizer, so that the balance between high strength and degradability is achieved, and the prepared degradable high-strength plastic bag can be used as a high-performance flexible packaging material.

The invention relates to the technical field of polymer solid-state electrolytes, and discloses a wide-temperature-range quasi-solid-state polymer electrolyte, a lithium metal battery and a preparation method and application of the lithium metal battery. The preparation method comprises the following steps: by taking bacterial cellulose containing Br active grafting sites on the surface as a substrate, grafting polyglycidyl methacrylate on the surface of the bacterial cellulose; grafting a crown ether group to a polyglycidyl methacrylate side chain to obtain a hybrid polymer brush filler; and compounding and assembling the hybrid polymer brush filler, polyvinylidene fluoride and lithium salt to obtain the wide-temperature-range quasi-solid polymer electrolyte. The hybrid polymer brush filler can reduce the thickness of an electrolyte membrane, remarkably increase the mechanical strength, inhibit the growth of lithium dendrites and improve the energy density of the battery; a crown ether group in a side chain can promote dissociation of lithium salt, rapid and uniform transmission of lithium ions is facilitated, and meanwhile, an inorganic SEI / CEI interface layer rich in LiF can be constructed in situ. The lithium ion transmission is accelerated without residual DMF (Dimethyl Formamide), and the long-term cycle performance and the consistency of the battery are excellent.

The invention discloses a magnetic carbon fiber material as well as a preparation method and application thereof. The magnetic carbon fiber material is Fe3O4 (at) MWCNTs (at) poly (GMA-co-TRIM) with a core-shell structure, wherein the Fe3O4 is located at the core, the outer layer of the Fe3O4 is wrapped with a core-shell layer MWCNTs formed by carboxylated multi-walled carbon nanotubes, and the outer part of the core-shell layer of the MWCNTs is wrapped with a load layer of polyglycidyl methacrylate crosslinked trimethylolpropane trimethacrylate (GMA-co-TRIM). The magnetic carbon fiber material Fe3O4 (at) MWCNTs (at) poly (GMA-TRIM) has the advantages of being easy and convenient to operate, environmentally friendly and capable of being combined with on-site rapid detection or large instrument detection and analysis, and high-flux automatic detection of synthetic cannabinoid in sewage can be achieved.

The invention discloses a continuous preparation method of high-dispersity polyglycidyl methacrylate (PGMA) microspheres based on a microfluidic technology, and aims to solve the core difficulties that the system is unstable, the flow velocity range is limited, the particle size and morphology uniformity of the microspheres are difficult to accurately control and the like in the existing preparation process. According to the method, a dispersed phase system with dichloromethane as a core is constructed, micro-fluidic operation parameters are optimized, a staged ultraviolet light polymerization curing process is adopted, the method has the advantages of energy conservation, high efficiency and batch synthesis, and the prepared PGMA microspheres have the advantages of uniform particle size, regular morphology, controllable pore structure and abundant epoxy functional groups on the surface, so that the performance of the PGMA microspheres is greatly improved. The method has wide application prospects in the fields of protein separation, sewage treatment, drug delivery, biosensor construction and the like.

The invention discloses an insulating material for an ultrahigh-voltage direct-current cable based on a gradient interface structure nano-composite and a preparation method of the insulating material. The insulating material is prepared from the following components in parts by weight: 80 to 100 parts of high-density polyethylene, 0 to 20 parts of low-density polyethylene, 1 to 3 parts of functionalized nano filler, 1.5 to 2.5 parts of dicumyl peroxide, 0.1 to 0.3 part of antioxidant and 0.1 to 0.3 part of lubricant. The core innovation lies in that the functionalized nano filler is nano magnesium oxide with a gradient interface structure constructed on the surface, the structure forms a poly (glycidyl methacrylate)-poly (1-octylene) block polymer chain through two-step graft polymerization, and continuous transition of modulus and polarity from the filler to a polyethylene matrix is realized. According to the insulating material, the maximum space charge density can be reduced to 1.2 * 10 < 3 > C / m < 3 >, the direct-current breakdown strength is larger than or equal to 550 kV / mm, the direct-current / alternating-current breakdown strength ratio reaches 0.74, the strength retention rate after 1000-hour aging is larger than or equal to 94%, and the insulating material has excellent mechanical performance and processing adaptability, is suitable for an ultrahigh-voltage direct-current cable with the voltage grade larger than or equal to 320 kV, can meet the requirement for long-distance high-capacity power transmission, and has a wide application prospect. And long-term safe and stable operation of the cable is ensured.

The application relates to the field of all-solid-state battery material preparation, in particular to a composite positive electrode binder and a preparation method thereof, a positive electrode sheet and a preparation method thereof, and an all-solid-state battery. 4 ~10 6 ; the first high molecular material comprises at least one of poly(ethylene-methacrylate-glycidyl methacrylate), poly(ethylene-glycidyl methacrylate) and polyglycidyl methacrylate; the second high molecular material comprises at least one of hydrogenated nitrile rubber (HNBR), nitrile rubber (NBR), ethyl cellulose (EC), styrene butadiene rubber (SBR) and polyvinylidene fluoride (PVDF); the binder is rich in polar groups and is easy to dissolve in a non-polar solvent, and cannot damage sulfide electrolyte. The prepared positive electrode sheet has higher ion / electron conductivity than that using a conventional binder, can widen a lithium ion transmission channel and improve battery cycle performance.

The invention provides a boron-lithium adsorption material as well as a preparation method and application thereof. The preparation method of the boron-lithium adsorption material comprises the following steps: providing layered double-metal hydroxide; grafting polyglycidyl methacrylate on the surface of the layered double-metal hydroxide to obtain an intermediate material; and carrying out epoxy ring-opening reaction on the amino-containing polyol and the polyglycidyl methacrylate on the surface of the intermediate material to prepare the boron-lithium adsorption material. According to the invention, the polyhydric alcohol is grafted on the surface of the layered double-metal hydroxide, so that the adsorption capacity of the layered double-metal hydroxide to borate radicals and lithium ions is improved, and a multi-stage adsorption mechanism among layers, laminates and surfaces is realized; the introduction of the polyhydric alcohol can enhance the selective adsorption of the polyhydric alcohol to borate radicals and improve the separation efficiency and selectivity; the boron-lithium adsorption material is excellent in structural stability, and solution loss and structural damage in the adsorption-desorption cycle process can be reduced.

The invention discloses a high-performance polylactic acid / poly (4-hydroxybutyrate) composite material based on interfacial reaction compatibilization as well as a preparation method and application thereof, and belongs to the technical field of preparation of high-performance biodegradable high polymer materials. The material is prepared from the following raw materials in parts by weight: 60 to 80 parts of polylactic acid, 10 to 40 parts of poly (4-hydroxybutyrate), 0.5 to 8 parts of polyglycidyl methacrylate and 0.1 to 0.5 part of antioxidant. According to the present invention, the compatibility between the polylactic acid and the poly (4-hydroxybutyrate) is improved by the glycidyl polymethacrylate through the chemical reaction at the interface, the glycidyl polymethacrylate can be well dispersed in the matrix, the interfacial tension of the composite material is reduced, and the adhesion between the polylactic acid and the poly (4-hydroxybutyrate) can be improved; further, the tensile strength, the elongation at break and the shape memory performance of the polylactic acid / poly (4-hydroxybutyrate) composite material are improved.

The invention relates to a carboxyl-functionalized hydrophilic polyglycidyl methacrylate-based microsphere and a preparation method and application thereof, the microsphere is of a core-shell structure, carboxyl-containing poly (methyl) acrylate or poly (methyl) acrylic acid is used as a shell layer, and a cross-linked polyglycidyl methacrylate-based polymer is used as a core layer. The preparation method comprises the following steps: firstly, preparing a poly (methyl) acrylate macroinitiator by adopting atom transfer radical polymerization, then initiating homopolymerization of a glycidyl methacrylate monomer or copolymerization of a glycidyl methacrylate and (methyl) acrylate monomer mixture by the initiator, and carrying out atom transfer radical polymerization-mediated polymerization-induced self-assembly reaction to obtain the polymer. And after the polymerization is finished, adding a crosslinking agent to crosslink the glycidyl methacrylate unit to obtain the stable polymer microspheres. And finally, hydrolyzing the poly (methyl) acrylate chain segment of the shell layer to prepare the hydrophilic microspheres. The preparation method disclosed by the invention has the advantages of simplicity and convenience in operation and high solid content of a product, and the hydrophilicity, the particle size and the like of the microspheres can be accurately regulated and controlled by changing monomer types and polymerization modes.

The invention provides a multi-hollow polymer microsphere and a preparation method thereof, and belongs to the technical field of colloidal microspheres, the multi-hollow polymer microsphere comprises polystyrene and polyglycidyl methacrylate, and the interior of the multi-hollow polymer microsphere is also provided with a plurality of hollow areas which can be identified by a transmission electron microscope. The preparation method comprises the following steps: step 1, preparing polystyrene (PS) microspheres through a dispersion polymerization method; and step 2, preparing the multi-hollow polystyrene-polyglycidyl methacrylate (PS-PGMA) composite microspheres by a seed emulsion polymerization method comprising a swelling step. According to the method, large-scale preparation can be realized, and the PS seed microspheres are endowed with hydrophilicity without adopting a specific polymerization formula, sulfonation, copolymerization by using hydrophilic monomers and the like, so that the method is very simple and convenient.

An electrolytic paper for aluminum electrolytic capacitors includes an upper surface layer, an intermediate support layer, and a lower surface layer. Both the upper and lower surface layers comprise cotton pulp fibers and / or hemp pulp fibers, while the intermediate support layer comprises aramid fibers. An interpenetrating polymer network is formed between the upper and lower surface layers and the intermediate support layer using active functional groups of polyacrylic acid or polyglycidyl methacrylate and its derivatives. In this invention, the intermediate support layer exhibits extremely high insulation strength and thermal stability, resulting in a 30%-50% or higher breakdown voltage of the composite electrolytic paper compared to pure natural fiber electrolytic paper of the same basis weight, demonstrating superior voltage withstand performance. Furthermore, the interpenetrating polymer network formed between the upper and lower surface layers and the intermediate support layer using polyacrylic acid or polyglycidyl methacrylate and its derivatives ensures rapid and thorough wetting of the electrolyte and long-term electrolyte retention, thereby ensuring capacitor capacity and reducing ESR.

The invention discloses a preparation process of a perfume slow-release agent under the action of a photocatalyst, and belongs to the technical field of environment optimization. Comprising the following steps: S1, preparing raw materials; s2, mixing the raw materials; s3, solidification forming and water washing; s4, soaking the formed ball body with spice; and S5, recycling and reusing the unadsorbed spices. According to the perfume sustained-release agent, the adsorption of perfume can be effectively improved through one or a combination of more of the activated carbon, the silica gel, the polystyrene and the polyglycidyl methacrylate contained in the porous adsorption core; meanwhile, the coating layer comprises one or a combination of more of water solutions of agar, gelatin, pectin, Arabic gum, hemicellulose, glucomannan gum and the like, one or a combination of more of xylene, dichloroethane, petroleum ether and heptane, one or a combination of more of Span80, Span85 and Twen20 and a photocatalyst; the release time of the perfumes adsorbed in the porous core can be effectively prolonged, and formaldehyde in air can be decomposed and removed.