807 results about "Ethylene glycol dimethacrylate" patented technology

The invention relates to the technical field of preparation of environment functional materials, in particular to a magnetic composite material surface imprinting thermosensitive adsorbent, and a preparation method and the application thereof. The method comprises the following steps that: firstly, a ferroferric oxide / nerchinskite nanotube magnetic composite material is prepared by a solvent thermal synthesis method; secondly, the magnetic composite material is modified on ethenyl by using 3-(methacrylo) propyltrimethoxyl silane; and finally, the nerchinskite nanotube magnetic composite material is prepared by using the ethenyl-modified magnetic composite material as a substrate material, 2, 4, 5-trichlorophenol as a template molecule, methacrylate as a functional monomer, N-isopropylacrylamide as a thermosensitive functional monomer, ethylene glycol dimethacrylate as a cross-linking agent, and 2,2'-azodiisobutyronitrile as an initiator. The prepared thermosensitive imprinting adsorbent is obvious in thermal stability and magnetic stability, sensitive in magnetic effect and thermosensitive effect, relatively high in adsorption capacity, obvious in reversible absorption / release function along with temperature and obvious in tertiary calcium phosphate (TCP) molecule recognition performance.

A preparation method and application of a molecular imprinted polymer on the silica surface for specifically adsorbing patulin belong to the technical field of bioassay. The method comprises the following steps: firstly pretreating the silica surface; siliconizing the silica surface to prepare APTS-silica and introducing amino groups; preparing ACPA-silica by dewatering and esterifying or an acyl chloride intermediate method and grafting an azo initiator on the silica surface; and finally taking the patulin analog 2-hydroxynicotinic acid as a template to replace molecules, taking acrylamide, methylacrylic acid, 4-vinyl pyridine and trifluoromethyl acrylic acid as the functional monomers and taking ethylene glycol dimethacrylate (EDMA) as a cross-linking agent to obtain the molecular imprinted polymer on the silica surface in acetonitrile and pyridine solvents by thermal initiation. The invention has the following advantages: as the pretreatment method for liquid chromatography of trace patulin in apple juice and related products, the polymer prepared by the invention can specifically adsorb the enriched patulin, the sample is simply and quickly treated and can be reused multiple times, and the polymer is resistant to acid and alkali treatment and is preserved under normal temperature, at the same time, the invention avoids the recovery loss caused by the traditional steps of removing impurities by alkaline washing by liquid-liquid extraction and removing organic solvents by rotary evaporation and reduces the usage amount of the organic solvents.

The invention relates to a preparation method of a bionic artemisinin molecular imprinting composite membrane, belonging to the technical field of environmental material preparation. The preparation method comprises the following specific steps: by taking a regenerated cellulose membrane as a substrate, artemisinin as a template molecule, acrylamide (AM) as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent, inlaying silicon dioxide nanoparticles with functional monomer modified surfaces to the surface of a membrane material by combination with a dopamine bionic principle, and performing two-step temperature polymerization to prepare the bionic artemisinin molecular imprinting composite membrane. The static adsorption experiment is used for making a research on the adsorption balance, dynamics and selective recognition performance of the prepared imprinting membrane. A result shows that the artemisinin imprinting membrane prepared by adopting the method is relatively high in adsorption capacity and superior in artemisinin molecular recognition penetration performance.

The present invention is preparation process of micron level monodispersed copolymer microsphere. Polystyrene seed is first prepared through a dispersed polymerization process; and then secondarily swelled and polymerized together with the composite monomer of styrene (St), divinyl benzene (DVB and ethylene glycol dimethyl acrylate (EGDMA) to prepare micron level St / DVB / EGDMA copolymer microsphere. The microsphere is regular, solid, homogeneous in grain size, monodispersed and heat resistant, and has strength and toughness meeting the requirement for making ACF.

The invention provides a manufacturing method and application of a Cr(VI) anion imprinted material. The material can be used for selectively adsorbing Cr(VI) anions. The material is prepared with SBA-15 modified by methacryloxypropyltrimethoxysilane as a substrate, potassium dichromate as template molecules, methacrylic acid and 4-vinylpyridine as bi-functional monomers, ethylene glycol dimethacrylate as a cross-linking agent and azodiisobutyronitrile as an initiator. The material is used for selectively adsorbing the Cr(VI) anions and has a very good adsorption effect. An imprinted polymer is grafted on the surface of mesoporous silica (SBA-15), and the problem that template ions are embedded too deep and are difficult to elute is avoided. The prepared Cr(VI) anion imprinted polymer is applied to dynamic adsorption experiments, and excellent regenerability is also presented.

The invention relates to a preparation method of a magnetic cadmium ion surface imprinted polymer, which comprises the following steps: synthesizing magnetic Fe3O4@SiO2 microspheres through a coprecipitation method and a sol-gel method, and treating with acid to increase the surface hydroxyl content; introducing polymerizable double bonds onto the surfaces of the Fe3O4@SiO2 microspheres through a two-step method, namely grafting amino groups onto the surfaces of the microspheres by using aminosilane coupling agent, and generating the double bonds through reaction between acid anhydride and the amino groups; and finally, performing polymerization reaction by taking the Fe3O4@SiO2 microspheres as carriers, taking Cd(II) as a template, taking ethylene glycol dimethacrylate as crosslinking agent and taking methacrylic acid and salicylaldoxime as monomers, and washing off the template Cd(II) after the reaction, thus obtaining a polymer layer with a large number of Cd(II) imprinted holes distributed on the surfaces of the Fe3O4@SiO2 microspheres. The magnetic cadmium ion surface imprinted polymer provided by the invention can be used for separation and removal of cadmium ions.

The invention relates to a method for preparing magnetic molecularly imprinted polymers (MIPs) through suspension polymerization, belonging to the technical field of preparation of environmental functional materials. In particular, in the method for preparing the magnetic MIPs through suspension polymerization, Fe3O4 magnetic particles are synthesized through a hydrothermal synthesis method, methacrylic acid is taken as a functional monomer, 2,4,6-trichlorophenol (2,4,6-TCP) is taken as template molecules, azodiisobutyronitrile is taken as an initiator, methylbenzene is taken as a pore-foaming agent, ethylene glycol dimethacrylate is taken as a crosslinking agent, and polyvinyl alcohol is taken as a stabilizing agent. The obtained MIPs are regular spheres, holes of specific shapes and sizes left by a plurality of template molecules are formed in the surfaces of the polymers, and specifically-arranged binding sites are arranged in the holes. By adopting the MIPs, highly-selective adsorption of a target pollutant, namely, 2,4,6-trichlorophenol can be realized.

The invention discloses an electrochemical paracetamol molecular imprinting transducer and a manufacturing method thereof. According to the transducer, a molecular imprinting technology and an electric analysis and chemical detection technology are combined. Paracetamol is taked as a template molecule, acrylamide is taken as a functional monomer, special resource rosin of Guangx is combined with paracetamol and acrylamide, and maleated rosin ethylene glycol dimethacrylate compounded by the rosin serving as a raw material is used as a cross-linking agent. The electrochemical paracetamol molecular imprinting transducer can be used for measuring the content of paracetamol, and has favorable selecting recognition performance. The electrochemical analysis method for detecting the paracetamol, which is provided by the invention, is simple and practical, and meanwhile, can be used for overcoming the defect of the complexity of the traditional method.

The invention relates to a self-reinforced hybrid hydrogel used for artificial muscles and a preparation method thereof. According to the invention, sodium alginate is used as a high-molecular skeleton, acrylamide and derivative thereof are used as polymerizable monomers, divinyl benzene, N,N'-methylene bis acrylamide or ethylene glycol dimethacrylate is used as a chemical cross-linking agent, an aqueous metal salt solution is used as an ion cross-linking agent, and then the hydrogel with high elasticity and high toughness is prepared. During a process of preparing the hydrogel, an organic matter emulsion containing metal ion aqueous solution is added. When the prepared hydrogel is stretched by external forces to a certain extent, the gel deforms to extrude the organic matter emulsion, and metal ions are released and then crosslinked with the sodium alginate in the hybrid gel, thereby substantially improving gel intensity and preventing gel fracture. The preparation method has advantages of good controllability, simple technology and low cost, the obtained hydrogel material can be self-reinforced, and is expected to be applied in fields of artificial cartilage, artificial muscle, flexible robot manufacture, etc.

The present invention belongs to the technical field of bioengineering, and relates to a method for purifying sulfanilamide by using a molecularly imprinted polymer of a sulfanilamide drug. The method comprises the following steps: (1) mixing and dissolving template molecules of a sulfanilamide drug mixture, a functional monomer of methacrylic acid and a cross-linking agent of ethylene glycol dimethacrylate in a pore forming agent (a ratio of methanol to acetonitrile is 2:3); adding an initiator, and sealing; (2) crushing the synthesized polymer, removing fine particles, removing the template molecules through extraction; (3) drying the template molecule-removed polymer overnight at a temperature of 60 DEG C to obtain the molecularly imprinted polymer of the sulfanilamide; (4) filling the molecularly imprinted polymer into a solid phase extraction column tube; (5) activating the solid phase extraction column, adding an animal tissue extraction solution or a water sample, wherein the animal tissue extraction solution is dissolved in 40% methanol; then leaching the solid phase extraction column to elute and purify the sulfanilamide. The method provided by the present invention has advantages of high selectivity, high specificity and adverse environment resistance, and has broad application potential.

A non-aqueous photopolymerizable inkjet ink, including as a photopolymerizable monomer: (a) ethylene glycol dimethacrylate; and (b) caprolactone-modified dipentaerythritol hexaacrylate or ethylene oxide-modified trimethylolpropane tri-methacrylate, or both thereof, wherein the ink includes the (a) component by 10% by mass to 95% by mass with respect to the entire photopolymerizable monomer, and the ink includes the (b) component by 5% by mass to 90% by mass with respect to the entire photopolymerizable monomer, and wherein the ink does not include a diluting solvent.

The invention discloses a lead ion imprinting integral column and a preparation method thereof. An imprinting polymer is the lead ion imprinting integral column which is prepared by an in-situ polymer molecular imprinting technique and comprises the following raw materials: lead ions serving as templates, methanol serving as a solvent, 4-vinylpyridine serving as a monomer, ethylene glycol dimethacrylate serving as a cross-linking agent, azobisisobutyronitrile serving as an initiator and dodecanol serving as a porogenic agent, wherein the mole ratio of the template to the monomer is 1:3, the volume fraction of the cross-linking agent is 25.0-30.0%, the concentration of the initiator is 0.9-1.1 mg / mL, and the volume fraction of the porogenic agent is 15.0-20.0%. Even though other competitive ions exist, the lead ion imprinting integral column has high absorption capability and selective recognition on free ions, the lead ions can be enriched from a solution containing trace lead ions, thereby achieving the purpose of concentrating the free ions. The lead ion imprinting integral column is suitable for high performance liquid chromatography and is in favor of further rapidly analyzing the lead ions.

The invention discloses a cross-linked polymer gel electrolyte membrane supported by a hydrophilic polytetrafluoroethylene microporous membrane. When the cross-linked polymer gel electrolyte membrane is prepared, firstly, methoxypolythylene glycol with double bonds and methyl acrylic glycidyl ester segmented copolymer are combined, ethylene glycol dimethacrylate, a thermal initiator and organic electrolyte containing lithium salt are added, stirring is conducted to form an even polymeric precursor solution; the hydrophilic polytetrafluoroethylene microporous membrane is immersed in the polymeric precursor solution and fully absorbs the polymeric precursor solution and is taken out, and the cross-linked polymer gel electrolyte membrane is obtained after cross-linked gelatinization is conducted. According to the cross-linked polymer gel electrolyte membrane, the preparation technology is simple, the electrolyte membrane is suitable for industrial production, a prepared cross-linked polymer gel electrolyte membrane system not only has a good mechanical property, but also has a good electrochemical property, an ionic conductivity at room temperature reaches up to 1.30*10-3 S cm-1, and an electrochemical stability window value can reach 4.5V. Lithium iron phosphate / lithium metal batteries assembled by the cross-linked polymer gel electrolyte membrane have good cycle performance under 25 DEG C and 70 DGE C.

The invention discloses a betaine type zwitterionic polymer antifogging coating and a preparation method thereof. The coating is prepared from components as follows: 77%-100% of a random copolymer p (BMAm-co-FMAn-co-AMAr) and 0-23% of polyethylene glycol dimethacrylate; the coating is prepared from a betaine type zwitterionic polymer with a crosslinking point and polyethylene glycol dimethacrylate as a cross-linking agent through ultraviolet curing and film-forming, and is a random copolymer formed by betaine type acrylate monomers, fluorinated acrylate and allyl methacrylate through free radical polymerization. Hydrophilic betaine type zwitterionic components are subjected to hydration with water to realize the antifogging effect; with introduction of an appropriate quantity of hydrophobic components, water vapor can be effectively isolated, and interaction of a hydrophobic part and water is not influenced; the crosslinking point is provided by allyl methacrylate, so that stability of the coating is improved; the coating has good transparency and antifogging performance, and light transmittance of the coating in a visible light wavelength range reaches 80% or higher.

The invention relates to a preparation method of a magnetic zinc ion surface-imprinted polymer, which comprises the following steps: synthesizing magnetic Fe3O4@SiO2 microspheres by a coprecipitation process and a sol-gel process, and treating with acid to enhance the surface hydroxy content; introducing a polymerizable double bond onto the surface of the Fe3O4@SiO2 microspheres by a two-step process, i.e. grafting amino group onto the microsphere surface by using an aminosilane coupling agent, and reacting acid anhydride with the amino group to generate the double bond; and finally, carrying out polymerization reaction by using the Fe3O4@SiO2 microspheres as a carrier, Zn (II) as a template, ethylene glycol dimethacrylate as a crosslinking agent and methacrylic acid and salicylaldoxime as monomers, and after the reaction finishes, washing out the template Zn (II) to obtain the polymer layer in which abundant Zn (II) imprinted holes are distributed on the Fe3O4@SiO2 microsphere surface. The magnetic zinc ion surface-imprinted polymer can be used for separating and removing zinc ions.

The invention provides a preparation method and application of a lithium-ion-imprinted polyethersulfone composite membrane, belonging to the technical field of preparation of functional materials. The lithium-ion-imprinted polyethersulfone composite membrane is prepared with a polyethersulfone membrane as a substrate membrane material, lithium ions as a template, 12-crown-4-ether as a binding site, methacrylic acid as a functional monomer, ethylene glycol dimethacrylate as a cross-linking agent and azodiisobutyronitrile as an initiator by using a combination of dopamine surface modification technology, silica nanometer compounding technology and imprinted polymerization technology. Static adsorption experiments are conducted to research the adsorption equilibrium, kinetic performance and selective recognition performance of the prepared lithium-ion-imprinted polyethersulfone composite membrane; and selective permeation experiments are carried out to research the permeation action of the prepared lithium-ion-imprinted polyethersulfone composite membrane on target ions (lithium ions) and non-target ions (sodium ions and potassium ions). The lithium-ion-imprinted polyethersulfone composite membrane prepared in the invention has high specific lithium ion adsorption capability and lithium ion recognition and separation capability.

The invention is concerned with the prepare method of capillary for solid phase microextraction. The methacrylic acid glycidyl is function monomer, the ethyleneglycol dimethacrylate is vulcanizing agent, toluene and dodecyl are mixed pore-causing agent, and 2,2'-azobisisobutyronitrile is initiator. Mix and mill the stuff and pour into quartz capillary disposed with ethylene, close and heat to polymerization. After the reaction, use solvent to clean capillary and remove the rudimental monomer, vulcanizing agent and pore-causing agent to get whole capillary with the polymer of methacrylic acid glycidyl and ethyleneglycol dimethacrylate. Use vitriol to clear the whole capillary to get hydroxylation, or clear the capillary with diethylamine and close to heat at 65 to 75 degree to get the capillary with the polymer of methacrylic acid glycidyl and ethyleneglycol dimethacrylate derived from diethylamine. The method is easy and low cost and the extraction agency stuff is fit to set up a credible and high sensitive analysis method.

The invention relates to a preparation method and application of a fluorescence ion imprinting probe and in particular relates to a method for preparing a fluorescence ion imprinting probe for detecting Cu<2+> as well as application of the fluorescence ion imprinting probe to detecting trace Cu<2+> in water, belonging to the technical fields of material preparation and detection. The invention particularly discloses a method for preparing an imprinting fluorescence probe by taking a metal europium ion complex as a luminous group, a bivalent Cu ion as a template molecule, methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent and azodiisobutyronitrile (AIBN) as an initiator. The trace analysis detection experiment and selective experiment are used for researching the selective analysis performance of the prepared fluorescence probe. The result proves that the obtained fluorescence imprinting probe has excellent Cu ion identification performance.

Flavone magnetic molecularly imprinted polymer, preparation of the flavone magnetic molecularly imprinted polymer, and application of the flavone magnetic molecularly imprinted polymer to bamboo-leafflavone separation belong to the technical field of drug separation. Preparation of flavone magnetic molecularly imprinted polymer microspheres include subjecting nano Fe3O4 subjected to surface modification by oleic oil, template molecule luteolin, functional monomer 4-ethylpyridine and cross linking agent ethylene glycol dimethacrylate to suspension polymerization according to a template molecule, functional monomer and crosslinking agent ratio of 1:5-8:80. The flavone magnetic molecularly imprinted polymer microspheres are applicable to selective enrichment and purification of bamboo-leaf flavones in bamboo-leaf extract, and the preparation is simple, quick, high in recovery rate and the like and is widely applicable to the field of separation of natural flavone compounds.

The invention discloses a method for synthesizing hydrogel, one out of N, N-(dimethylamino) ethyl methacrylate or methylacrylic acid polyethylene glycol single methyl ether ester is taken as a monomer, the monomer, an initiator, a cross-linking agent, a catalyst, a complexing agent and a reductant are added according to the molar ratio that monomer: initiator: cross-linking agent: catalyst: complexing agent and reductant is equal to 100-1000: 1: 1-50: 0.05-3: 0.15-9: 1-10, so as to carry out the AGET ATRP reaction and synthesize the hydrogel; wherein the initiator is selected from one out of polyethylene glycol bis (alpha-bromoisobutyrate) ester or 2,6-dibromo dimethyl heptanedioate; the cross-linking agent is one out of ethylene glycol dimethacrylate or poly(ethylene glycol) dimethacrylate; and the catalyst is selected from one out of hexahydrated high ferric chloride or ferric bromide. The method can control the crosslinking degree by regulating the using amount of the cross-linking agent, so that the method can control the mesh size of the hydrogel, control the liquid absorption performance of the hydrogel and obtain the hydrogel with good biocompatibility.

The invention discloses an anti-algae anti-aging fishing net prepared from the following components: polystyrene, polyethylene fibers, nylon fibers, MBS resin, an epoxy resin adhesive film, ethylene glycol dimethacrylate, a calcium carbonate powder, an attapulgite powder, dibutyl phthalate and calcium stearate. The prepared fishing net has simple processing technology; ultraviolet intermittent irradiation treatment is carried out in a process of polyethylene fiber treatment, and the prepared fishing net can be allowed to have extremely strong performance of preventing algae attachment; the nylon fibers have the defects that the nylon fibers have poor optical rotation resistance, are prone to yellowing and have the strength decreased when illuminated for a long time by the sun outdoor, so a hexamethylene diamine and maleic anhydride mixture is adopted for treating the nylon fibers, the problems are solved, and the anti-aging ability of the prepared fishing net is greatly improved; and through addition of the treated attapulgite powder, mechanical properties of the fishing net are improved, and the toughness is enhanced.

The invention discloses a method for determining vanillin by virtue of photonic-crystal molecular imprinting hydrogel. The method comprises the steps of firstly, preparing a silicon dioxide photonic crystal on a common glass sheet, and dissolving vanillin, methylpropenoic acid, ethylene glycol dimethacrylate and azodiisobutyronitrile in methyl alcohol to form a molecular imprinting precursor; permeating the precursor between organic glass and the photonic crystal, and performing ultraviolet polymerization; removing silicon dioxide by hydrofluoric acid, and soaking with methyl alcohol to remove vanillin; and forming the photonic-crystal molecular imprinting hydrogel on the organic glass. The photonic-crystal molecular imprinting hydrogel disclosed by the invention has the advantages of high response speed, high selectivity, high sensitivity, high anti-interference capacity and the like when being used for determining trace vanillin. The preparation method is simple, is low in cost and good in reproducibility, can be used for detecting vanillin in foods, and provides a technical support for detecting a food additive.

The invention discloses a polymer cement waterproof coating acrylic emulsion comprising the components in percentage by weight in the formula: 10-20 percent of styrene, 1-10 percent of methyl methacrylate, 30-45 percent of butyl acrylate, 0.1-0.5 percent of methacrylic acid, 1-3 percent of ethylene glycol dimethacrylate, 1-3 percent of emulsifier, 0.3-0.8 percent of persulfate and the balanced of water. Compared with the prior art, the invention has more excellent chemical stability and crack resistance property, good retarding property when being mixed with cement and convenient site construction.

The invention provides a preparing method of Tetracycline molecular imprinting column. The invention includes the following steps: dissolving template molecular Tetracycline (TC) with ultrasound in methanol, adding functional monomer and pore-forming agent (cyclohexanol and lauryl alcohol), oscillating for 6 hours, adding crosslinking agent (ethylene glycol dimethacrylate) and initiator (azobisisobutyronitrile), after ultrasonic degassing, adding nitrogen for 20 minutes, deoxidizing, pouring the solution into 10cm stainless column with bottom sealed, sealing the top end, putting the column into 60 DEG C water for water bath, after 12 hours, obtaining the molecular imprinting column by heat initiation reaction. Connecting the column to the high-pressure pump for washing away the pore-forming agent and template molecular, in the end the molecular imprinting column with good separation effect is obtained. Compared with traditional bulk polymerization method, the invention has the characteristics of simple preparation for avoiding process of lapping, good molecular recognition ability and so on. The molecular imprinting column provided by the invention is used as a liquid chromatogram filling, and can realize separation, enrichment and purification of Tetracycline antibiotics.

The invention provides a dibutyl phthalate molecularly imprinted polymer (DBP-MIP) solid phase extraction column and a preparation method and application method thereof, belonging to the technical field of analytical chemistry. The DBP-MIP is prepared by dissolving a template molecule DBP, a functional monomer methacrylic acid and a crosslinking agent ethylene glycol dimethacrylate into a porogen chloroform or acetonitrile, adding an initiator azobisisobutyronitrile, filling nitrogen to remove oxygen, carrying out initiated polymerization at 55-75 DEG C, and grinding, sieving and washing a polymer after completing reaction. The preparation method is characterized by weighing a certain amount of polymer and filling the polymer into a polypropylene column to prepare the solid phase extraction column. The prepared MIP solid phase extraction column can highly selectively separate and enrich DBP in samples such as environment, food, chemical products and the like and effectively remove matrix interference, and has great application values and market prospects.

The invention provides a cross-linked quaternary phosphonium ionic liquid. The preparation method comprises the following steps: mixing 4-ethenyl benzyl chloride with triphenyl phosphonium at mol ratio of 1:1-1:1.5, heating to the room temperature to 60 DEG C, and reacting for 20-48h to obtain the quaternary phosphonium ionic liquid; mixing ethylene glycol dimethacrylate with the quaternary phosphonium ionic liquid at mol ratio of 1:1-5:1, adding azo diisobutyronitrile which is 1-5% of the total molar weight of the ethylene glycol dimethacrylate and the quaternary phosphonium ionic liquid, heating to the temperature of 60-90 DEG C, and reacting for 20-48h; and washing reaction products by acetone and tetrahydrofuran in turn to obtain the cross-linked quaternary phosphonium ionic liquid. Experiment proves that the cross-linked quaternary phosphonium ionic liquid catalyst provides high catalytic activity to a reaction of CO2 epoxy compound for generating five-membered cycle compound, and has very high selectivity and high conversion rate. Reaction conditions are optimized, yield is up to 99.2%, and the selectivity is 100%.

The invention relates to a bisphenol A dummy template molecularly imprinted stir bar and a preparation method thereof. The stir bar is a glass bar containing an iron core, wherein the glass bar is coated by a polymer coating; the polymer coating is a bisphenol A dummy template molecularly imprinted polymer; modified silica microspheres with grain size being 400nm are taken as the carriers for synthesizing the imprinted polymer; and biphenyl diphenol is taken as a dummy template molecule. The bisphenol A dummy template molecularly imprinted polymer is prepared by carrying out surface grafting on the surfaces of silica microspheres with grain size being 400nm with vinyltrimethoxysilane to obtain the modified silica microspheres, then subjecting the modified silica microspheres to react withbiphenyl diphenol, 4-vinyl pyridine, ethylene glycol dimethacrylate and azodiisobutyronitrile and using a methanol-glacial acetic acid mixed solution to wash off the template molecule. The stir bar and the preparation method have the following beneficial effect that: SiO2 is taken as the carrier for synthesizing the imprinted polymer, thus greatly adding the number of the effective binding sites and improving the sensitivity.

The invention relates to a preparation method of a chloramphenicol molecular imprinted adsorbing material on the surface of a magnetic carbon microsphere. The magnetic carbon microsphere is prepared from shaddock peel by adopting a solvent thermal synthesis method, the surface of the magnetic carbon microsphere is subjected to ethylene functional modification by KH570, the treated magnetic carbon microsphere is used as a matrix material, chloramphenicol is used as a template, hydroxyethyl methylacrylate and 4-vinylpyridine are used as functional monomers, N-isopropyl acrylamide is used as a thermosensitive monomer, ethylene glycol dimethacrylate and N,N-methylene bisacrylamide are used as cross-linking agents, 2,2'-azobis[2-methylpropionamidine] dihydrochloride is used as an initiator, and the magnetic carbon microsphere surface imprinted thermosensitive adsorbing material is prepared in a methanol / water mixed system, and the adsorbing material is used for selective recognition and selective separation of chloramphenicol in a water environment. The prepared molecular imprinted adsorbing material on the surface of the magnetic carbon microsphere is low in cost, can be prepared easily, has the high recognition and selectivity properties, high separation and enrichment ability and high adsorption rate of target molecules, and is high in adsorption speed.