153 results about "Polyglycidyl methacrylate" patented technology

The invention discloses a polymer microsphere and preparation method thereof. The microsphere comprises a core and surface graft; wherein the core is monodispersed polystyrene-divinyl benzene microsphere with crosslinking degree of 60-90% and grain diameter of 2-20 microns, and the surface graft is polyglycidyl methacrylate or derivate thereof. Friedel-Crafts acylation is utilized, alpha-halogenacyllhalide is taken as acylation agent, initiator molecule is bonded on the surface of the microsphere; conventional atom transfer radical polymerization method is utilized to initiate monomers glycidyl methacrylate to condense; then different nucleopilic reagent is utilized for opening ring, and amino, hydroxyl, hydrazine, carboxyl and sulfydryl groups are introduced onto the surface of the microsphere. The polymer microsphere can be used as separation material for different chromatographs for high efficiency ion exchange, chelation and high efficiency affiliation, also can be used as carrier for fixing enzyme and catalyst and is an excellent functional microsphere.

The invention discloses a preparing method and application of a transparent conducting thin film. The method comprises the steps that thin film base materials are placed in mixed liquid of ethyl alcohol and acetone for ultrasonic processing for 90 min-150 min, deionized water is used for washing, and drying is carried out for standby application; then argon oxygen plasma is used for surface processing, and a hydrophilic thin film A is obtained; glycidyl polymethacrylate is dissolved in a solvent and then is arranged on the hydrophilic thin film A in a spraying-coating mode, the solvent is removed, a thin film B is obtained, then an ethanol solution of a silver nanowire is arranged on the thin film B in a spraying-coating or blade-coating mode, vacuum drying is carried out, and a thin film C is obtained; and the argon oxygen plasma is used for carrying out surface processing on the thin film C, a thin film D is obtained, then a graphene water solution is used for being sprayed on the thin film C in a coating mode by a plurality of times, finally vacuum drying is carried out, and the transparent conducting thin film is obtained. The transparent conducting thin film can be stretched, great electrical conductivity and great light transmittance are achieved, and a conducting coating layer and a substrate of the thin film have great adhesive force.

The invention discloses a preparation method and application of a poly-glycidyl methacrylate interosculated porous material. The preparation method is characterized in that the poly-glycidyl methacrylate interosculated porous material (PolyGMA) with an epoxy functional group is obtained through high internal phase emulsion polymerization of glycidyl methacrylate (GMA), and the material can adsorb a harmful substance namely phenol in smoke gases. The material can selectively reduce over 25 percent of the released amount of the phenol in cigarette mainstream smoke gas by adding 10 to 30 mg of the material into each cigarette filter stick, but the released amount of tar is basically not changed or is reduced slightly; and simultaneously, the material does not generate negative effect on the smoking quality of cigarettes, thereby fulfilling the aim of selectively reducing the released amount of the phenol in the cigarette smoke gas.

The invention discloses a preparation method for a porous monolithic column immobilized enzyme micro-reactor. The porous monolithic column immobilized enzyme micro-reactor is prepared according to the preparation method as follows: firstly, a poly (GMA-co-EDMA) monolithic column is prepared; and then the poly (GMA-co-EDMA) monolithic column is modified by cysteamine and gold nanoparticles so as to obtain a porous polymer monolithic column, wherein, the gold nanoparticles are immobilized on the surface of the porous polymer monolithic column. Enzyme is immobilized to the hole surfaces of the porous monolithic column modified by the gold nanoparticles by utilizing the action of Au-NH2 bond, and then the porous monolithic column immobilized enzyme micro-reactor can be obtained. The preparation method has the advantages as follows: the preparation method is simple; enzyme immobilization reaction conditions are moderate; the permeability of the enzyme micro-reactor is good; large immobilized enzyme quantity can be achieved; the activity, the service life and the stability of enzyme are high in comparison with free solution enzymolysis, and enzyme can be used repeatedly.

The invention discloses an epoxy resin thermal conductive composite material, preparation thereof and an application. According to the epoxy resin thermal conductive composite material, boron nitride with the surface coated with polymer is dispersed in epoxy resin, and the volume ratio of the boron nitride accounts for 3%-15% of the composite material. Preferably, the average particle size of the boron nitride is 10 micrometers to 40 micrometers. The polymer is polyglycidyl methacrylate, and the thickness of a polymer layer coating the surface of the boron nitride ranges from 3 nanometers to 10 nanometers. By improving a key thermal conductive filler structure in the epoxy resin thermal conductive composite material, additive amount and the like, the corresponding preparation method is adopted, and the problems of poor thermal conductive performance and high viscosity of epoxy resin composite materials can be effectively solved as compared with the prior art.

The invention relates to a separation and purification technique, in particular to an affinity chromatography stationary phase of immobilized metal and a preparation method thereof. The structure of the stationary phase is shown in the drawing; wherein, the particle size of GMAPolymer micro-sphere is 10nm-50um; the GMAPolymer micro-sphere is poly-methacrylic acid glycidyl esters micro-sphere. By carrying out amination and phosphoric esterification, a synthesis method of the high-performance poly-methacrylic acid glycidyl ester-group novel affinity chromatography stationary phase is gained and used for the research in phosphorylation proteomics and highly-selective separation, enrichment and purification of phosphopeptide by the chelation with zirconium ions and iron ions; meanwhile, compared with the traditional stationary phase, the affinity chromatography stationary phase reduces the nonspecific adsorption on the non-phosphopeptide.

The invention discloses a quantum dot with high transparency and high fluorescence efficiency / epoxy resin nano composite material, preparation and applications thereof, and belongs to the technical field of nano composite material. Poly(n-butyl methacrylate-glycidyl methacrylate) P(BMA-GMA) amphiphilic two-section copolymer compatibilizer is introduced, the PBMA section of the P(BMA-GMA) copolymer is utilized to soak the oleic acid ligand on the quantum dot surface, the PGMA section of the P(BMA-GMA) is utilized to soak the epoxy substrate, and thus a good interface compatibilizing effect is achieved. The amphiphilic compatibilizing effect of the two-section copolymer is utilized to increase the interface compatibility of quantum dots in epoxy resin substrate, thus the quantum dots are evenly dispersed in the substrate, and the prepared quantum dot / epoxy resin nano composite material has excellent transparency and fluorescence performance, and has a wide application prospect in the field of white light packaging.

The invention relates to a method for preparing superparamagnetic microspheres with a surfactant-based nuclear shell, which comprises the following steps of: preparing monodispersed polyglycidyl methacrylate microspheres by a free radical polymerization of monomeric polyglycidyl methacrylate in the presence of an initiator and an emulsifying agent or a dispersing agent; preparing monodispersed porous polyglycidyl methacrylate microspheres with larger size by a one-step seed swelling polymerization; adding divalent and trivalent iron to stir, raising the temperature of the system, adding excessive concentrated ammonia water, and preparing monodispersed superparamagnetic microspheres in situ by an iron salt deposition and an alkaline coprecipitation method; the magnetic microspheres are subjected to surface carboxylic acid modification by distillation precipitation polymerization. The superparamagnetic microspheres with the surfactant-based nuclear shell have the advantages of good mono-dispersity, controllable magnetic content and the like, the microspheres have abundant carboxylic acid groups on the surface, and after a subsequent binding to biological ligands, and can be widely applied to the fields of biomedical analysis and detection, such as immobilized enzyme and cell separation, protein purification, immunoassay, and the like.

The invention provides application of high-content epoxy group polyethylene glycidyl methacrylate interconnected porous materials in cigarettes. The application is characterized in that high internal phase emulsion polymerization of the glycidyl methacrylate (GMA) is triggered through radiation to obtain the polyethylene glycidyl methacrylate porous materials (Poly GMA) with high content of epoxy group. Compared with reported Poly GMA materials, the polyethylene glycidyl methacrylate interconnected porous materials (Poly GMA) has higher content of epoxy group, and can more effectively absorb harmful substance phenol in smoke gas. 5-20mg of the Poly GMA materials are added in each cigarette filter rod so that the releasing amount of phenol in main stream smoke gas in the cigarettes can be selectively reduced by above 35%, and negative effects on the smoking quality of the cigarettes are not caused. Therefore, the purpose that the releasing amount of the phenol in the smoke gas in the cigarettes is selectively reduced is achieved.

The invention discloses a series of low-toxicity and efficient cationic gene vectors with PGMA (polyglycidyl methacrylate) serving as a framework constructed by an ATRP (atom transfer radical polymerization) method, which belong to the technical field of nonviral gene vectors. The ATRP method is stable in polymerization reaction and easy in regulation and control, and can prepare various high-performance cationic gene vectors different in molecular weight and narrow molecular weight distribution according to needs. The prepared cationic gene vectors are high in storage stability, higher than gold mark PEI (polyethyleneimine) in transfection efficiency in cells such as Hepg2, C6, Cos7, HEK293 and the like and simple in use method, and have commercial potential.

The invention belongs to the field of nitroxide free radical catalysts, aims at solving the problem that the existing homogeneous catalyst TEMPO (tetramethyl-piperidyl-nitroxide free radical) is difficult to separate and recover after reaction and can not be reused to seriously restrict development of a catalytic system, and provides an epoxy polymer microsphere immobilized (tetramethyl-piperidyl-nitroxide free radical) TEMPO catalyst, as well as a preparation method and an application method thereof. According to the preparation method, 4-OH-TEMPO (4-hydroxy-2,3,6,6-tetramethyl-piperidyl-nitroxide free radical) is bonded on a (crosslinked poly glycidyl methacrylate microsphere) CPGMA to prepare the solid catalyst TEMPO / CPGMA shown in the general formula I immobilized by TEMPO. According to the preparation method, the TEMPO is subjected to chemical bonding on a solid carrier, immobilization of TEMPO is realized, homogeneous catalysis oxidation is changed to heterogeneous catalysis oxidation, and therefore, the heat stability of the catalyst is improved, separation of the catalyst from a reaction medium is convenient, the catalyst is reused, and high activity can be generated.

The invention relates to a preparation method of a free nitroxide radical polymer brush polymerization inhibitor, and application of the free nitroxide radical polymer brush polymerization inhibitor in synthesis of epoxy soybean oil acrylic ester. The preparation method comprises the following steps: firstly, grafting a polyglycidyl methacrylate polymer brush on the surfaces of cross-linked polystyrene microspheres by using an electron transfer regenerated catalyst atom transfer free radical polymerization technique, and secondly, bonding tetramethyl piperidine free nitroxide radical onto the polyglycidyl methacrylate polymer brush, thereby obtaining the free nitroxide radical polymer brush. The application comprises: taking the free nitroxide radical polymer brush as a main polymerization inhibitor and a small molecule polymerization inhibitor as a polymerization inhibitor aid, thereby forming a composite polymerization inhibition system for preparing epoxy soybean oil acrylic ester. The composite polymerization inhibition system not only has a high-efficiency polymerization inhibition function in the epoxy soybean oil acrylic ester preparation, but also is easy in recycling the main polymerization inhibitor, namely the free nitroxide radical polymer brush, so that the free nitroxide radical polymer brush can be recycled, and a product can be prevented from self-polymerization when being preserved when a small amount of the polymerization inhibitor is retained in the system.

The invention discloses a polyethylene glycol-aminated poly(glycidyl methacrylate)-poly(diisopropylaminoethanol methacrylate) triblock polycation and a synthetic method thereof, and a dual acid-sensitivity multilayer cation micelle prepared from the triblock polycation and a preparation method thereof. The cation micelle comprises a neutral polyethylene glycol PEG external layer, an aminated poly(glycidyl methacrylate) PAG intermediate layer and a poly(diisopropylaminoethanol methacrylate) PDPA inner layer, wherein the PEG external layer can shield a part of positive charges and improve stability of the micelle, the PAG intermediate layer has positive electricity and can absorb electronegative nucleic acid drugs, and the PDPA inner layer has hydrophobicity and can entrap hydrophobic drugs. Furthermore, the invention also discloses application of the dual acid-sensitivity multilayer cation micelle in synchronous co-delivery of nucleic acid and hydrophobic anticancer drugs, and the dual acid-sensitivity multilayer cation micelle is mainly used for reversion of multidrug resistance of cancer cells or inhibition of cancer cell metastasis.

The invention relates to restricted access poly (styrene-co-divinyl benzene)-coated silica gel chromatographic packing and a preparation method thereof. The preparation method comprises the following steps of: introducing an atom transfer radical polymerization (ATRP) initiator into the surface of porous silica gel microspheres and coating poly (styrene-co-divinyl benzene) on the surface of silica gel through the grafting from method; then grafting polyglycidyl methacrylate on the surface of the coated layer; and further performing hydrolysis to get the hydrophilic surface so as to get the restricted access poly (glycidyl methacrylate-g-(styrene-co-divinyl benzene))-coated silica gel chromatographic packing. The polymer-coated silica gel chromatographic packing has the functions of combining with hydrophobic micromolecules and excluding biological macromolecules, and can perform effective separation on hydrophobic compounds in biological complex samples under the situation of eliminating the protein precipitation pretreatment process, be used as a chromatographic stationary phase or a solid-phase extraction agent, perform direct sample introduction, separation, extraction and determination on micromolecular compounds in biological or environmental samples and further realize the high-efficiency analysis and determination of micromolecular substances in a biological system.

The invention relates to a method for preparing high-capacity protein ion-exchange chromatographic medium through atom transfer radical polymerization. The method comprises a bromination procedure of coupling a glycidyl methacrylate microsphere with the microsphere of an initiator 2-bromoisobutyryl bromide and a synthesis procedure of initiating polymerization of monomeric compounds on the surface of the microspheres through free radical transfer so as to obtain the ion-exchange polymer grafted chromatographic medium. The method prepares the polymer grafted ion-exchange chromatographic medium through atom transfer radical polymerization technology; the synthesized polymer grafted ion-exchange chromatographic medium has controllable density and chain length of graft polymer; reaction conditions are mild; the selection range of the monomeric compounds used as monomer is wide; gamma globulin saturated adsorption capacity of the synthesized polymer grafted ion-exchange chromatographic medium can reach above 800 mg / g of a wet medium, so the chromatographic medium has excellent adsorptivity; and adsorption equilibrium can be realized within 5 min in a protein solution with a concentration of 1 mg / mL, so the chromatographic medium has wide application prospects.

The invention discloses a poly-glyceryl methacrylate grafted hydrophobic charge-induced chromatography medium and a preparation method thereof. The preparation method comprises the following steps: taking hydrophilic porous microspheres as a chromatography medium, activating the chromatography medium by virtue of an activating reaction, carrying out a poly-glyceryl methacrylate polymerization reaction on the surface of the activated chromatography medium, thereby obtaining a polymer grafted chromatography medium; and finally, coupling a hydrophobic charge-induced ligand, thereby obtaining the polymer grafting type hydrophobic charge-induced chromatography medium. The chromatography medium disclosed by the invention has the poly-glyceryl methacrylate grafting chain and hydrophobic charge-induced functional ligand, the ligand density is high, the dynamic loading capacity of target proteins such as antibodies is obviously improved at high flow velocity, the chromatography medium has salt-independent adsorption characteristics, and desorption and recovery can be realized by changing the pH value of the solution to be weakly acidic. The preparation process of the novel medium is simple and convenient, strict oxygen removal in the grafting reaction process is not needed, and the amount of catalysts and ligand is small.

The invention discloses a preparation method of a nanopolyaniline-containing compound anti-corrosion coating auxiliary agent, and relates to a polymer nano composite material. Monodisperse micron-graded poly(methyl methacrylate)glycidyl ester microspheres are obtained through dispersion polymerization; under an acid doped environment, aniline monomers are polymerized on the microsphere surface, polyaniline nanowires are loaded on the microspheres, and thus the micron-graded spherical anti-corrosion auxiliary agent is obtained; the auxiliary agent is mixed with epoxy matrix resin and all kinds of solvents for adjusting a coating, the microspheres are dissolved by a solvent, and at the same time, the polyaniline nanowires are dispersed in the coating; phenylamine has less use amount, can be highly dispersed, also has crosslinking functions, has large practical meaning, and has excellent industrialization prospect.

The invention discloses a preparation method of a theophylline molecular surface printing material, and relates to a molecular printing polymer. The preparation method comprises the following steps of: activating silica gel microparticles; connecting surface chemical bonds of silica gel microparticles with sulfydryl containing silane coupling agents; chemically grafting polyglycidyl methacrylate on surfaces of silica gel microparticles; modifying by 5-aminosalicylic acid; and preparing the surface molecular printing polymer of silica gel microparticles. According to the invention, high performance molecular printing polymer is prepared through a method of graft polymerization and crosslinking printing sequentially. The molecular surface printing material has special identifying selection and excellent combining affinity to theophylline.

The present invention discloses a hydrophobic porous composite membrane, a preparation method, and an application thereof. According to the present invention, the substrate of the hydrophobic porous composite membrane is a hydrophobic porous membrane; a layer of a copolymer is compounded on the surface of the hydrophobic porous membrane; the copolymer is a random copolymer or a block copolymer, the hydrophobic end of the copolymer is polymethacrylic acid-2-ethyl cinnamate or polyacrylic acid-2-ethyl cinnamate, the hydrophilic end of the copolymer is one selected from polymethyl methacrylate, polymethyl acrylate, polyacrylamide, polyvinylpyrrolidone, polyacrylonitrile or polyglyceryl methacrylate. According to the present invention, with the method for the hydrophilic modification of the hydrophobic porous membrane, the hydrophilicity of the hydrophobic membrane is effectively improved; the hydrophobic porous membrane and the copolymer are subjected to cross-linking coupling, such that the prepared composite membrane has characteristics of good use stability and long aging; with the hydrophobic porous composite membrane of the present invention, defects of insufficient wettability of the hydrophobic membrane and low liquid absorption rate of the membrane in the existing lithium battery are overcome.

The invention relates to a phase-change material microcapsule with photo-thermal conversion and energy storage properties and a preparation method. A microcapsule core is a phase-change material withheat storage capacity; the wall material is of a multi-wall structure, and a polydivinylbenzene high polymer shell layer is arranged in the wall material and is mainly used for packaging the phase-change material; an MXene shell layer is arranged outside and can be used for improving the encapsulation efficiency and the heat storage capacity of the microcapsule and endowing the microcapsule with aphotothermal conversion effect. According to the preparation method, a one-pot method is adopted to prepare the novel phase-change material microcapsule in a system in which amphiphilic macromolecule1, 1-stilbene-terminated polyglycidyl methacrylate and MXene coexist synergistically and stably. The microcapsule with the multi-wall structure is stable in shape and high in encapsulation rate, hasrelatively high latent heat storage density and excellent photothermal conversion performance, and greatly enriches the application of the phase-change material microcapsule in the fields of solar energy utilization and the like.

The invention relates to a preparation method of hydrophilic latex-agglomerated anion chromatographic packing. Produced resin is used for filling a chromatographic column. The preparation method comprises: agglomerating a quaternizated polyglycidyl methacrylate-dimethyl acrylate glycol ether hydrophilic nano spherical latex agglomeration agent and surface-sulfonated copolymer skeleton microspheres to obtain the hydrophilic latex-agglomerated anion chromatographic packing resin, wherein the agglomeration agent is uniformly adsorbed onto a sulfonation layer on the surface of the skeleton microspheres, and the sulfonation layer is completely coated. Fluorine ions and water negative peaks of a sample detected by a packing filled chromatographic column are completely separated, the peak of seven ions is sharp and symmetric, the spread is moderate, and the accuracy of a detection result is high.

The invention relates to a preparation method for a polymer microcapsule. The preparation method comprises the steps of using polyglycidyl methacrylate with surface activity and monomer polymerization function as a macromolecule emulgator and an initiator, triggering the polymerization of hydrophobe monomer under the condition of heating to obtain the polymer microcapsule. Compared with the current preparation method for the polymer microcapsule, the micromolecule emulgator and the initiator do not need to be added additionally, the system and the preparation process are simple, the post-treatment is simple and convenient, the universality is strong, and the cost is lower. The preparation method is suitable for the industrial large-scale production.

The invention relates to a graphene oxide (GO)-coated PGMA (poly-glycidyl mathacrylate) microsphere composite anti-corrosive coating additive and a preparation method thereof. The GO-coated PGMA microsphere composite anti-corrosive coating additive is characterized in that PGMA microspheres with uniform particle size distribution and micrometer size are prepared by a single dispersing method; a surfactant CTAB (cetyltrimethyl ammonium bromide) is adsorbed to the surface of each microsphere, the ammonia ions in the CTAB are positively charged, and the long alkyl chain has lipophilicity, so thatthe surface of each microsphere is positively charged after the CTAB is adsorbed to the surface of each PGMA microsphere; the GO has huge specific surface area, and contains a large amount of electronegative oxygen-containing function groups, such as epoxy groups, hydroxyl groups and carboxyl groups, the positive ions can be effectively adsorbed by electrostatic adsorption, and the GO irregularlycoats the surface of the polymer microsphere, so as to obtain the GO-coated PGMA microsphere composite anti-corrosive coating additive.

The invention belongs to the technical field of heavy metal environmental governance, and discloses a method for preparing a porous polymer microsphere with a heavy metal chelating function, porous poly glycidyl methacrylate polymer microspheres are prepared by free radical emulsion polymerization, and heavy metal chelating functional groups are used for modification of the surface of the microspheres and the surface of holes for establishment of heavy metal chelating adsorption channels to prepare the porous polymer microsphere with the heavy metal chelating function. The porous polymer microsphere with the heavy metal chelating function has the advantages of large specific surface area, many heavy metal chelating sites, and high efficiency, stability and durability of adsorption and removal of heavy metals, and can be conveniently bonded to the surface of a substrate.

The invention relates to an aminated poly-glycidyl methacrylate crosslinked composite microsphere, being of a porous structure prepared from a matrix polymer and aminated poly-glycidyl methacrylatewherein the matrix polymer is a web template, the aminated poly-glycidyl methacrylate are crosslinked into a web of the matrix polymer, and the mass ratio of the matrix polymer to the aminated poly-glycidyl methacrylate is (1 to 3) : 1. The porosity of the composite microsphere is 75-90 percent, and the specific surface area is 7-20m<2> / g. The invention relates to a preparation method of the aminated poly-glycidyl methacrylate crosslinked composite microsphere, comprising the following steps: (1) polymerization reaction; (2) preparation of the poly-glycidyl methacrylate crosslinked composite microsphere; (3) modification of the poly-glycidyl methacrylate crosslinked composite microsphere. A high polymer adsorbent greater in porosity and specific surface area, controllable in size, stable in nature, and used for clearing bilirubin during blood perfusion can be obtained.

The invention provides a core-shell structure type composite flame retardant and a preparation method thereof. The core-shell structure type composite flame retardant uses ammonium polyphosphate particles as a core and polyglycidyl methacrylate as a coated shell layer. The invention also provides a preparation method of the core-shell structure composite flame retardant. Because a surface layer of the flame retardant provided by the invention is made of waterproof polyglycidyl methacrylate, ammonium polyphosphate can be effectively protected from being dissolved and eroded by water, the water resistance of the ammonium polyphosphate is remarkably improved, a composite material in which the flame retardant is added can be applied to severe working environments such as damp and hot environments; because the polyglycidyl methacrylate has an epoxy group with extremely high reaction activity and can generate a good interface bonding function with an added polymer matrix through chemical reactivity, the mechanical properties of a flame-retardant polymer material can be remarkably improved, and the filling enhancement is realized. The preparation method provided by the invention is simple in process and strong in operability; the larger-scale production is easily realized.

The invention belongs to the technical field of immobilized metal phthalocyanines heterogeneous catalysts, and particularly relates to an immobilized metal phthalocyanines catalyst prepared by the aid of synchronous synthesis and immobilization processes. The immobilized metal phthalocyanines catalyst is a polymethylacrylic acid glycidyl ester / silica gel immobilized metal phthalocyanines catalyst. A method for preparing the immobilized metal phthalocyanines catalyst includes bonding 4-(4-carboxyl phenoxy) phthalonitrile on polymethylacrylic acid glycidyl ester / silica gel carriers to obtain modified micro-particles bonded with phthalonitrile; carrying out ring formation reaction on the modified micro-particles and substituted phthalonitrile and metal salt in solution; synchronously synthesizing and immobilizing metal phthalocyanines. The immobilized metal phthalocyanines catalyst and the method have the advantages that technologies for preparing the immobilized metal phthalocyanines catalyst are simple, the immobilized metal phthalocyanines catalyst is low in cost, selected raw materials for the immobilized metal phthalocyanines catalyst can come from wide sources, post-treatment is simple, the immobilized metal phthalocyanines catalyst and the method are applicable to industrial production, the heat stability of the immobilized metal phthalocyanines catalyst can be improved, the immobilized metal phthalocyanines catalyst is convenient to separate from reaction media and can be reused, and the efficiency of catalysis procedures can be greatly enhanced; methylene blue in wastewater can be effectively degraded by the prepared immobilized metal phthalocyanines by the aid of visible light, and oxygen can be catalyzed by the immobilized metal phthalocyanines catalyst to efficiently oxidize styrene in an environment-friendly manner.

The invention discloses a preparation method of a surface polymer brush modified hydrogel material. Beta-hydroxyethyl methacrylate (HEMA) is used as a main monomer to prepare cross-linked hydrogel, and the physical and chemical properties of the hydrogel are changed by adding a third component. Then, hydroxyl on the surface of the hydrogel is activated into amino, the amino is coupled to carboxyl at the tail end of polyglycidyl methacrylate (PGMA) prepared through reversible addition-fragmentation chain transfer (RAFT) free radical polymerization, and a polymer chain is grafted to the surface of the hydrogel. Further, the surface of the hydrogel is modified with functional molecules through the reaction of small molecules with amino groups and epoxy groups in the PGMA. Through a post-modification method, the surface of the hydrogel is modified with a layer of functional polymer brush, and the length of the polymer brush can be adjusted through the RAFT polymerization reaction feeding ratio. On the basis of keeping the water content and mechanical properties of the hydrogel, the surface properties of the hydrogel are changed, and the protein adsorption resistance is improved.

The invention discloses a preparation method of a high-efficiency hydrophobic medium and an application of the high-efficiency hydrophobic medium in purification of defibrase. The preparation method comprises the following steps of: 1) preparing polyglycidyl methacrylate (PGMA) microspheres by virtue of a dispersion polymerization method; and 2) preparing the high-efficiency hydrophobic medium by taking the polyglycidyl methacrylate (PGMA) microspheres as a matrix, wherein the high-efficiency hydrophobic medium is filled in a stainless steel chromatographic column with a pressure of 20 MPa, and then the column is connected with a liquid chromatography system and used for purifying defibrase. The preparation method disclosed by the invention has the advantages that product purity is high, yield is high, operation is simple and convenient, industrialization requirements can be achieved, and popularization is facilitated.

The invention discloses an HIPS composite material with excellent chemical resistance. The HIPS composite material comprises the following components in parts by weight: 85-95 parts of an HIPS raw material; 5-15 parts of PBT; 0.5-3 parts of a compatilizer; 2-4 parts of a toughening agent; 0.1-1 part of an antioxidant; 0.1-1 part of a lubricant; the compatilizer is one or more of a styrene monomercopolymerization glycidyl methacrylate polymer, a polystyrene grafted glycidyl methacrylate copolymer and a high-impact polystyrene grafted glycidyl methacrylate copolymer, wherein the weight combination ratio of the glycidyl methacrylate is 0.5-10 weight percent. In addition, the invention also discloses a preparation method of the HIPS composite material with excellent chemical resistance. The HIPS composite material is excellent in mechanical property, good in chemical resistance and relatively low in cost, and the preparation method is simple in process and convenient for large-scale production and application.