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35results about How to "Achieve specific adsorption" patented technology
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Method for preparation of amidoxime functionalized hollow porous polymer microspheres with CO2 as emulsion template
ActiveCN110961085AAvoid binding instabilitySimple preparation processOther chemical processesSeawater treatmentEmulsionSilica nanoparticles
Belonging to the technical field of adsorption separation functional materials, the invention relates to a method for preparation of an amidoxime functionalized hollow porous adsorbent with CO2 as anemulsion template. The method includes: firstly, preparing silicon dioxide nanoparticles and MF-HP; adding MF-HP and PEA into ethanol, carrying out ultrasonic treatment and water bath reaction, and conducting washing, ethanol cleaning and drying to obtain MF-NH2-HP, adding the MF-NH2-HP into a glutaraldehyde aqueous solution, performing water bath, washing, alcohol washing and drying to obtain MF-CHO-HP, then adding the MF-CHO-HP and DAMN into an ethanol solution, performing water bath, washing, alcohol washing and drying to obtain MF-CN-HP, adding the MF-CN-HP and hydroxylamine hydrochlorideinto a mixed solution of water and ethanol, carrying out reaction, and then conducting washing, alcohol washing and drying to obtain MF-AO-HPS. By grafting PEA, the method provided by the invention provides possibility for subsequent modification of a large number of action sites, and combination with a hollow porous structure not only improves the adsorption capacity of adsorption U(VI), but alsoaccelerates the mass transfer kinetics.
Owner:HANGZHOU ENJOY ENVIRONMENTAL PROTECTION TECH
Magnetic polyimide composite material, and preparation method and application thereof
ActiveCN109201019AStrong magnetismAvoid inconvenienceOther chemical processesWater contaminantsRefluxSynthesis methods
The invention discloses a magnetic polyimide composite material, and a preparation method and application thereof. The preparation method comprises the following steps: subjecting amino-modified Fe3O4, melamine and benzenetetracarboxylic dianhydride to a polymerization reaction in a DMSO solvent under a high-temperature reflux condition; and then carrying out washing and drying to obtain the magnetic polyimide composite material. The magnetic polyimide composite material synthesized by using the method has the advantages of good dispersibility, large specific surface area, stable core-shell structure, simple synthesis method, low cost, recyclability and the like. A covalent polyimide material bonded to ferroferric oxide can provide various forces such as pi-pi action, hydrophobic action, hydrogen bond action and weak cation exchange action, so the composite material has strong adsorption effect on compounds containing an aromatic conjugated system and alkaline compounds.
Owner:HENAN UNIV OF CHINESE MEDICINE
Preparation method for mixed three templates molecularly imprinted solid phase extraction column and application thereof
ActiveCN105032376AGood stabilityHigh strengthIon-exchange process apparatusComponent separationSpecific adsorptionMolecularly imprinted polymer
The invention discloses a preparation method for a mixed three templates molecularly imprinted solid phase extraction column and application thereof, and the preparation method comprises the steps of performing dissolving, prepolymerization, and polymerization in sequence for the adopted three template substances, and eluting template substances, drying and filling a column to obtain the mixed three templates molecularly imprinted solid phase extraction column. The preparation process is simple, easy to control; a prepared mixed three templates molecularly imprinted polymer has good stability, high strength, good uniformity, acid and alkali resistance, high specific adsorption efficiency for substances such as triazole, pyrethroid and triazine, no need to grind, and can be directly filled to form the column. The invention also provides the application of the extraction column absorbing the substances such as the triazole, the pyrethroid and the triazine. The method provided by the invention is suitable for preparing the mixed three templates molecularly imprinted solid phase extraction column; a prepared product can be further used for purification and enrichment of samples when pesticide multi-residues of the triazole, the pyrethroid and the triazine in food, feed and other samples are being analyzed.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Basic orange II molecular imprinting solid-phase extraction filler, solid-phase extraction column and preparation methods and application thereof
InactiveCN102755881AEasy to achieve specificityStrong specificityOther chemical processesCross-linkFunctional monomer
The invention discloses a basic orange II molecular imprinting solid-phase extraction filler, which is molecular imprinting polymer micro-particles which are prepared by taking basic orange II as template molecules, acrylamide as functional monomer, maleated rosin ethylene glycol acrylate as a cross-linking agent and azo-bis-iso-butyrynitrile as an initiator. The solid-phase extraction filler has a memory function to the stereo structure of basic orange II molecules, can realize the specificity, selective separation and enrichment of the basic orange II, is packed into the solid extraction column, can be used for detecting the selective separation, purification and enrichment of the basic orange II in sample extraction solution containing the basic orange II in foods, realizes high-sensitivity and high-selectivity detection for food samples containing the basic orange II, has stable recovery rate and small relative standard deviation and has the characteristics of simpler, quicker and more efficient operation and the like.
Owner:GUANGXI UNIV FOR NATITIES
Microfluidic chip with microstructure array and nucleic acid solid phase purification and extraction method
PendingCN108102881AIncrease contact areaExtraction efficiency maintainedBioreactor/fermenter combinationsBiological substance pretreatmentsMicrofluidic chipSolid phases
The invention discloses a microfluidic chip with a microstructure array and a nucleic acid solid phase purification and extraction method. The microfluidic chip includes a microfluidic channel and a microstructure array distributed in the microfluidic channel. The microstructure array comprises a plurality of micropillars arranged in an array. The surfaces of the micropillars are connected to an adsorbent. The adsorbent is used for adsorbing nucleic acid. Compared with the prior art, the method utilizes the microfluidic chip with a microstructure array as a base, realizes adsorption and elution of nucleic acid through modification of the microfluidic channel interior with an agent for physical absorption of nucleic acid and has simple, fast and efficient operation processes. The microfluidic chip is easily integrated with a downstream nucleic acid amplification microfluidic chip so that a chip lab is constructed and is especially for on-site rapid detection.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Method for enriching vitamin K2 in natto bacillus fermentation liquid
PendingCN109706193AImprove adsorption efficiencyImprove featuresMicroorganism based processesFermentationVitamin K2Microsphere
The invention relates to a method for enriching vitamin K2 in natto bacillus fermentation liquid. The method comprises the following steps of step 1, performing centrifugation on the natto bacillus fermentation liquid, and collecting supernatant; step 2, adding a flocculant and a filter aid to the supernatant obtained in the step 1, then performing stirring, performing centrifugation, and collecting supernatant; step 3, adding Fe3O4@SiO2-G nanometer microspheres which are reduced to the supernatant obtained in the step 2, regulating the pH to 6.0-8.0, then performing stirring treatment under the condition of 20-35 DEG C for 10-30min, and then collecting magnetic materials after adsorption; and step 4, adding hexane to the magnetic materials after adsorption, performing ultrasonic parsing for 5-20min, then externally applying a magnet, collecting magnetic nanometer materials, pouring out organic phase, and performing filtering, wherein filtrate is a hexane solution rich in vitamin K2. According to the method for enriching vitamin K2 in natto bacillus fermentation liquid, the VK2 in the natto bacillus fermentation liquid can be quickly and efficiently enriched. The method has the advantages that the specific steps are simple, the materials are low in price, and can be reused, and the enrichment effect is efficient.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Organic electrochemical transistor sensor based on molecularly imprinted membrane
ActiveCN106770515AHigh sensitivityAchieve specific adsorptionMaterial electrochemical variablesFunctional monomerPower flow
The invention discloses an organic electrochemical transistor sensor based on a molecular imprinted membrane, characterized in that a gate electrode of the organic electrochemical transistor sensor adopts a gold electrode modified with the molecular imprinted membrane, and the gate electrode is obtained by that an object to be detected is used as a template molecule, the template molecule is polymerized with a corresponding functional monomer by cyclic voltammetry to form a polymer membrane on the surface of the gold electrode firstly, and then the template molecule in the polymer template is eluted; and the gate electrode regulates and controls the channel current between a source electrode and a drain electrode through the solution of the object to be tested to constitute the organic electrochemical transistor sensor for selectively recognizing the object to be detected. The invention combines the molecular imprinting technique with the organic electrochemical transistor device, uses the specificity selection of the molecular imprinting technique and the signal amplification function of the organic electrochemical transistor sensor to recognize the specificity of the object to be detected, can selectively absorb the micro and even trace object to be detected, and has good selectivity, high sensitivity and low detection limit.
Owner:HEFEI UNIV OF TECH
Preparation method of TNT magnetic molecularly imprinted polymer microspheres
ActiveCN108586660AAchieve specific adsorptionEasy to detectOther chemical processesCross-linkFunctional monomer
The invention discloses a preparation method of TNT magnetic molecularly imprinted polymer microspheres. The method comprises the steps of: firstly adopting 3-aminopropyltriethoxysilane to perform amination modification on surfaces of Fe3O4 nanoparticles, then dispersing the aminated Fe3O4 nanoparticles in acetonitrile, adding a template molecule TNT and functional monomer acrylamide, performing prepolymerization, adding a cross-linking agent ethylene glycol dimethacrylate and an initiator azobisisobutyronitrile so as to prepare magnetically imprinted polymer microspheres, and finally performing elution treatment on the microspheres to obtain the TNT magnetic molecularly imprinted polymer microspheres. By combining technologies of molecular imprinting with magnetic separation, the preparedpolymer particles have a uniform shape and uniform size, the specific surface area of the TNT molecularly imprinted polymer microspheres is increased, and good adsorption and separation performance are achieved, wherein the adsorption amount is about 2.6 times that of a traditional embedding method, the separation time is about 1 / 5 of that of the embedding method, and specific adsorption of TNT is achieved.
Owner:NANJING UNIV OF SCI & TECH
Copper ion test paper and method for testing copper ions in water
ActiveCN105067602AAchieve specific adsorptionRich in mesoporesMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationSpecific adsorptionDioxide titanium
Owner:CHONGQING UNIV
Application of H-Beta type molecular sieve in NPs detection or adsorption and method for simultaneously detecting eight NPs
ActiveCN114113413ARealize accurate detectionLow detection limitComponent separationMolecular sieveSpecific adsorption
The invention provides application of an H-Beta type molecular sieve in NPs detection or adsorption and a method for simultaneously detecting eight NPs, and relates to the technical field of analysis and detection. According to the method, the H-Beta type molecular sieve is adopted as an adsorbent of the neonicotinoid pesticide (NPs) in the sample pretreatment process, and specific adsorption of the NPs in a sample can be achieved, so that the accuracy, precision and sensitivity of detection of the NPs in water and honey are improved; the repeated utilization rate of the H-Beta type molecular sieve is high, and the requirements of rapidness, accuracy, saving and good repeatability in pretreatment and detection of eight NPs samples in a sample to be detected can be met. The detection is carried out through high performance liquid chromatography-tandem mass spectrometry detection. The method provided by the invention can realize accurate detection of eight trace NPs, the detection limit of NPs in water is less than 0.1 ng / mL, and the detection limit of NPs in honey is less than 2.0 ng / g.
Owner:SHANGHAI ACAD OF AGRI SCI
Magnetic triptycene-triazine covalent framework solid-phase extracting agent and preparation method and application thereof
ActiveCN109351335AAvoid inconvenienceReduce difficultyIon-exchange process apparatusOther chemical processesSynthesis methodsSolid phase extraction
The invention discloses a magnetic triptycene-triazine covalent framework solid-phase extracting agent and a preparation method and application thereof. The preparation method comprises the followingsteps: in the presence of AlCl3, carrying out Friedel-Crafts polymerization reaction on amino modified Fe3O4, triazine and triptycene under the condition of reluxing, and washing and drying to obtainthe magnetic triptycene-triazine covalent framework solid-phase extracting agent. The magnetic triazine-based composite material synthesized by the method has the advantages of good dispersibility, large specific area, stable core-shell structure, simplicity and convenience in synthetic method, low cost, repeatability and recyclability and the like. By a covalent organic framework which is bondedto ferroferric oxide, various acting forces such as pi-pi effect, hydrophobic effect, hydrogen-bond interaction and electron transfer effect can be provided, and thus, the magnetic triptycene-triazinecovalent framework solid-phase extracting agent has high adsorption effect on compounds containing aromatic conjugated systems.
Owner:HENAN UNIV OF CHINESE MEDICINE
MAF-stu-13 material having ultra-microporous dia-a network topology as well as synthesis and application of MAF-stu-13 material
ActiveCN112090403ASimple processMild conditionsIon-exchange process apparatusOther chemical processesCrystal systemBenzoic acid
The present invention relates to a MAF-stu-13 material having an ultra-microporous dia-a network topology, the chemical formula is {[Zn (MIBA) 2]} n, n is a non-zero natural number, and MIBA is 4-(2-methylimidazole) benzoxy; the material belongs to a tetragonal crystal system and a P4nc space group, has a one-dimensional pore channel in the c-axis direction, and has excellent thermal stability andchemical stability. The MAF-stu-13 can be rapidly synthesized in a large scale, a solution that a general MOFs material is difficult to synthesize in a large scale is provided, and the material synthesis process comprises the steps that metal zinc salt, ligand HMIBA and a DMF solvent are placed in a pressure-resistant bottle in a certain proportion and sealed, and heating and stirring are conducted for 1 h at the temperature of 120 DEG C through a solvothermal reaction. The MAF-stu-13 material with the ultra-micropore dia-a network topological structure can specifically adsorb Bz in a Bz andCH mixed solution, the Bz is eluted from a frame, the purity of the Bz is up to 99.4%, and therefore liquid-phase adsorption separation of Bz / CH is achieved. While the MAF-stu-13 is able to extract anamount of Bz from commercially pure CH. The MAFstu13 is capable of specifically adsorbing Bz and is based on a synergistic effect of size exclusion and supramolecular binding.
Owner:SHANTOU UNIV
Sudan red I molecularly-imprinted solid phase extraction padding, solid phase extraction column as well as preparation method and application of padding
InactiveCN103055829AEasy to achieve specificityAchieve specific adsorptionComponent separationOther chemical processesCross-linkRelative standard deviation
The invention discloses Sudan red I molecularly-imprinted solid phase extraction padding. The Sudan red I molecularly-imprinted solid phase extraction padding refers to molecularly-imprinted polymer particles which is prepared in a way that Sudan red I is taken as a template molecule, acrylamide is taken as a function monomer, maleated rosin glycol acrylate is taken as a cross-linking agent, and azoisobutyronitrile is taken as an initiating agent. The solid phase extraction padding has a memory function on a three-dimensional structure of a molecule of the sudan red I, the specificity, the selective separation and the enrichment of the sudan red I are realized, the padding is filled so as to form a solid phase extraction column, and the solid phase extraction column is used for detecting the selective separation, purification and the enrichment of the Sudan red I in an extraction solution containing a sudan red I food sample; and the high sensitivity and high selectivity detection on the food sample containing the sudan red I is realized, and the method provided by the invention has the characteristics of being high in recovery ratio, small in relative standard deviation, simple and rapid to operate, high in efficiency and the like.
Owner:GUANGXI UNIV FOR NATITIES
Adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and preparation method thereof
PendingCN111359597AGuaranteed feasibilityImprove adsorption capacityWater treatment parameter controlOther chemical processesCrystallographyAdsorptive membrane
The invention discloses an adsorption film for selectively immobilizing trivalent arsenic, trivalent antimony and tetravalent selenium and a preparation method of the adsorption film, and belongs to the technical field of gradient diffusion films. The adsorption film is a polyacrylamide hydrogel film, a sulfydryl-amino double-modified SBA-15 type mesoporous silicon material is distributed in the polyacrylamide hydrogel film, and the mole number ratio of sulfydryl to amino is (4-6): 1. The adsorption film disclosed by the invention is simple in preparation process and good in distribution uniformity, and has good selectivity and synchronous fixing capability on trivalent arsenic (As III), trivalent antimony (Sb III) and tetravalent selenium (Se IV).
Owner:NANJING UNIV
Preparation method of patulin magnetic molecularly imprinted polymer
ActiveCN110156941ATo achieve specific identificationAchieve specific adsorptionOther chemical processesSpecific adsorptionMolecular imprinting
The invention discloses a patulin magnetic molecularly imprinted polymer. According to the invention, applications of specific recognition, efficient separation and enrichment of patulin in agricultural products can be realized through a magnetic separation technology and a molecular imprinting identification technology, adsorption and separation performance is good, and specific adsorption of patulin can be realized.
Owner:BEIJING PURKINJE GENERAL INSTR
Method for preparing high-density crown ether site porous adsorbent by surface photoinitiation
ActiveCN110404514AAvoid binding instabilitySimple preparation processOther chemical processesProcess efficiency improvementChemistryNitrogen gas
The invention belongs to the technical field of adsorption separation functional material preparation, and particularly relate to a method for preparing a high-density crown ether site porous adsorbent by surface photo initiation. The method includes the following steps that first, 2AM12C4 and PVBC are prepared and obtained; the PVBC is added into a mixed liquor of water and DMF, water-free Na2S2O3 after ultrasonic dissolution is added, and water bath, ethanol cleaning, and air drying are conducted to obtain PVBC-S2O3 which is added into a quartz bottle with the 2AM12C4, after being sealed, nitrogen is introduced under ultraviolet irradiation, the grafting polymerization of the monomer 2AM12C4 is initiated on the surface of the PVBC-S2O3 and at last, ethanol cleaning, and air drying are conducted to obtain PVBC-g-PCE; and a substrate material contains a large amount of chloromethyl group through participation of 4-VBC in polymerization, the unstable combination caused by subsequent modification is avoided, preparation processes are simplified, and the dynamic performance and adsorption capacity of the adsorbent are improved.
Owner:JIANGSU UNIV
Blood purification adsorbent and preparation method and application thereof
ActiveCN111686704AHigh mechanical strengthImprove adsorption capacityOther chemical processesOther blood circulation devicesPorous tantalumPolyvinyl alcohol
The invention belongs to the technical field of biological materials, and particularly relates to a blood purification adsorbent and a preparation method and application thereof. The blood purification adsorbent comprises an inner core with mesopores and macropores, a first outer modification layer distributed in the mesopores of the inner core, and a second outer modification layer distributed inthe macropores of the inner core, wherein the inner core comprises a porous carbon-based material and a porous titanium-based material, the first outer modification layer comprises polyvinyl alcohol,porous zinc oxide and porous tantalum oxide, the second outer modification layer comprises polyethylene glycol and medical macromolecules containing hydroxyl groups, and the ratio of the number of the hydroxyl groups to the number of carbon atoms in the medical macromolecules is not less than 1: 5. The blood purification adsorbent has good mechanical strength, adsorption performance and biocompatibility, and can adsorb pathogenic factors in blood or plasma.
Owner:苏州仝康医疗科技有限公司
A method for surface photoinitiated preparation of porous adsorbent with high density crown ether sites
ActiveCN110404514BAchieve specific adsorptionShorten the diffusion pathOther chemical processesProcess efficiency improvementUltraviolet lightsMethyl group
The invention belongs to the technical field of preparation of adsorption and separation functional materials, and specifically relates to a method for preparing a porous adsorbent with high-density crown ether sites by surface photoinitiation; the steps are as follows: firstly, 2AM12C4 and PVBC are prepared; PVBC is added to the mixed solution of water and DMF, Add anhydrous Na after ultrasonic dissolution 2 S 2 o 3 , after washing in water bath, ethanol, and vacuum drying, PVBC‑S 2 o 3 , and then add 2AM12C4 into the quartz bottle, seal it, pass nitrogen gas and put it under the condition of ultraviolet light irradiation, in PVBC‑S 2 o 3 The graft polymerization of the monomer 2AM12C4 is initiated on the surface of the surface, and finally, PVBC-g-PCE is obtained by ethanol cleaning and vacuum drying; the present invention makes the base material itself have a large amount of chloromethyl groups by participating in the polymerization of 4-VBC, avoiding subsequent modification The phenomena such as unstable combination are caused, the preparation process is simplified, and the kinetic performance and adsorption capacity of the adsorbent are improved.
Owner:合肥九州龙腾科技成果转化有限公司
Preparation method of molecularly imprinted polymer based on curcumin, electrochemical sensor and application thereof
PendingCN114874484AHigh sensitivityImprove anti-interference abilityMaterial electrochemical variablesSpecific adsorptionOrganic solvent
The invention provides a curcumin-based molecularly imprinted polymer preparation method, which comprises: mixing curcumin, an organic solvent and water to obtain a mixed solution; mixing magnetic Fe3O4 nanoparticles, zein and the mixed solution, and carrying out auto-polymerization to obtain an initial polymer; and cleaning the initial polymer to remove curcumin so as to obtain the curcumin-based molecularly imprinted polymer. The invention further provides an electrochemical sensor based on the molecularly imprinted polymer of curcumin and application based on the electrochemical sensor. The electrochemical sensor provided by the invention is based on specific adsorption of the molecularly imprinted polymer, so that the electrochemical sensor has high efficiency, rapidness and accuracy when being used for detecting curcumin.
Owner:CHONGQING MIDECO PHARMA CO LTD
A kind of solid-phase extraction agent of magnetic triacene-triazine covalent framework and its preparation method and application
ActiveCN109351335BAvoid inconvenienceReduce difficultyIon-exchange process apparatusOther chemical processesPolymer scienceTriazine
The invention discloses a solid-phase extractant of a magnetic triacene-triazine covalent framework and its preparation method and application. The preparation method is prepared in AlCl 3 In the presence of the amino-modified Fe 3 o 4 , Cyanuric chloride and triacene undergo Friedel-Crafts polymerization under the condition of reflux, and after washing and drying, a magnetic triacene-triazine covalent skeleton solid-phase extraction agent can be prepared. The magnetic triazine-based composite material synthesized by the method has the advantages of good dispersibility, large specific surface area, stable core-shell structure, simple and convenient synthesis method, low cost, repeatable recycling and the like. The covalent organic framework bonded to ferroferric oxide can provide various forces such as π-π interaction, hydrophobic interaction, hydrogen bond interaction, electron transfer effect, etc., so it has a strong effect on some compounds containing aromatic conjugated systems. Adsorption.
Owner:HENAN UNIV OF CHINESE MEDICINE
Basic orange II molecular imprinting solid-phase extraction filler, solid-phase extraction column and preparation methods and application thereof
InactiveCN102755881BEasy to achieve specificityStrong specificityOther chemical processesFunctional monomerCross linker
The invention discloses a basic orange II molecular imprinting solid-phase extraction filler, which is molecular imprinting polymer micro-particles which are prepared by taking basic orange II as template molecules, acrylamide as functional monomer, maleated rosin ethylene glycol acrylate as a cross-linking agent and azo-bis-iso-butyrynitrile as an initiator. The solid-phase extraction filler has a memory function to the stereo structure of basic orange II molecules, can realize the specificity, selective separation and enrichment of the basic orange II, is packed into the solid extraction column, can be used for detecting the selective separation, purification and enrichment of the basic orange II in sample extraction solution containing the basic orange II in foods, realizes high-sensitivity and high-selectivity detection for food samples containing the basic orange II, has stable recovery rate and small relative standard deviation and has the characteristics of simpler, quicker and more efficient operation and the like.
Owner:GUANGXI UNIV FOR NATITIES
A kind of magnetic polyimide composite material and its preparation method and application
ActiveCN109201019BStrong magnetismEasy to separateOther chemical processesWater contaminantsPolymer sciencePyromellitic dianhydride
The invention discloses a magnetic polyimide composite material and its preparation method and application. The preparation method is to prepare amino-modified Fe in DMSO solvent 3 o 4 , Melamine and pyromellitic dianhydride are polymerized under high-temperature reflux, and the magnetic polyimide composite material can be obtained after washing and drying. The magnetic polyimide composite material synthesized by the method has the advantages of good dispersibility, large specific surface area, stable core-shell structure, simple and convenient synthesis method, low cost, repeatable recycling and the like. The covalent polyimide material bonded to ferric oxide can provide various forces such as π-π interaction, hydrophobic interaction, hydrogen bond interaction, weak cation exchange interaction, etc., so the material is suitable for some aromatic conjugated systems , Basic compounds have a strong adsorption.
Owner:HENAN UNIV OF CHINESE MEDICINE
Method for preparing functional porous hydrogel based on liquid-gas-liquid drop reactor
ActiveCN114653348AAchieve specific adsorptionSimple preparation processOther chemical processesAlkali metal oxides/hydroxidesMeth-Sorbent
The invention belongs to the technical field of adsorption separation functional materials, and discloses a method for preparing functional porous hydrogel based on a liquid-gas-liquid drop reactor. The preparation method comprises the following steps: firstly, preparing functional units of polyamidoxime and methacryloyl gelatin, then adding the polyamidoxime and methacryloyl gelatin into a NaOH solution, adding a photoinitiator 2-hydroxy-2-methyl propiophenone after the polyamidoxime and methacryloyl gelatin are completely dissolved, carrying out uniform vortex dispersion, then carrying out high-speed stirring to prepare a gas-in-water type liquid-gas-liquid drop reactor, and carrying out high-speed stirring to obtain the polyamidoxime / methacryloyl gelatin composite photoinitiator. Carrying out polymerization initiated by ultraviolet light to prepare an amidoxime functional porous hydrogel-based adsorbent GMPAO; the preparation process of the adsorbent is simplified through direct use of the polyamidoxime functional unit, and a large number of binding sites are provided for selective extraction of hexavalent uranium in an aqueous solution; the use of the liquid-gas-liquid drop reactor provides an effective method for the controllable preparation of the porous structure, and the mass transfer kinetics of the adsorbent is accelerated by combining the water absorption of the hydrogel with the porous structure.
Owner:JIANGSU UNIV
A kind of copper ion detection test paper and the method for detecting copper ion in water
ActiveCN105067602BAchieve specific adsorptionRich in mesoporesMaterial analysis by observing effect on chemical indicatorPreparing sample for investigationSpecific adsorptionPre enrichment
The invention relates to a copper ion detection test paper and a method for detecting copper ions in water. The detection test paper attaches nano-titanium dioxide and hydrazine functionally modified diamino groups to the adsorption base layer to achieve specific adsorption of copper ions and further achieve pre-treatment. purpose of enrichment. The present invention also provides a method for detecting copper ions in water by using the copper ion detection test paper. The detection method does not require the participation of pretreatment process and large-scale instruments, and has fast detection speed, low cost, strong anti-interference ability, and low detection limit. The lower detection limit of the invention for copper ions can reach 30nM, and its saturated adsorption capacity can reach 4.964μg / cm2.
Owner:CHONGQING UNIV
Preparation method and application of mixed three-template molecularly imprinted solid-phase extraction column
ActiveCN105032376BImprove stabilityHigh strengthIon-exchange process apparatusOther chemical processesSpecific adsorptionTriazine
The invention discloses a preparation method of a mixed three-template molecularly imprinted solid-phase extraction column, which is prepared by using three template substances through the steps of dissolving, prepolymerizing, polymerizing, eluting the template substance, drying, and column packing in sequence. The preparation process is simple and easy to control. The prepared mixed three-template molecularly imprinted polymer has good stability, high strength, good uniformity, acid and alkali resistance, and specific adsorption efficiency for triazoles, pyrethroids and triazines. High, without grinding, can be directly packed into columns. The present invention also provides the application of the above-mentioned extraction column in the aspect of adsorbing triazoles, pyrethroids and triazines. The invention is suitable for preparing a mixed three-template molecularly imprinted solid-phase extraction column, and the prepared product can be further used for the purification and enrichment of samples in the multi-residue analysis of triazoles, pyrethroids, and triazines in food, feed, and other samples. set.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Sandwich structure molecularly imprinted sers substrate and preparation method and application thereof
ActiveCN111662410BNot easily oxidizedImprove stabilityOther chemical processesFluorescence/phosphorescenceMethacrylateFunctional monomer
The invention provides a sandwich structure molecularly imprinted SERS substrate, and a preparation method and application thereof. The preparation method comprises the following steps: polymerizing gold nanoparticles on the surface of graphene oxide by using p-aminothiophenol as an intermediate agent; and polymerizing an upper molecular imprinting layer on the compound by taking a biguanide hypoglycemic agent as a template molecule, methacrylic acid as a functional monomer and ethylene glycol dimethacrylate as a cross-linking agent. The graphene oxide provides a good binding site for the molecularly imprinted polymer, the molecularly imprinted polymer has selective adsorption capacity, and the gold nanoparticles play a role in SERS enhancement. Compared with an existing detection technology, the preparation method has the following advantages: the sandwich structure molecularly imprinted SERS substrate MIP@Au-GO is obtained by adopting a mode of synthesizing polymers step by step, thesynthesis method is simple, the size, the number and the distance between the gold nanoparticles and target molecules are controllable, the adsorption efficiency is high, the detection effect is stable, and the application prospect is wide.
Owner:SOUTH CHINA AGRI UNIV
a use of co 2 Method for preparing amidoxime-functionalized hollow porous polymer microspheres as emulsion templates
ActiveCN110961085BAchieve specific adsorptionImprove adsorption capacityOther chemical processesSeawater treatmentHydroxylamineMicrosphere
A use of CO 2 A method for the preparation of amidoxime-functionalized hollow porous polymer microspheres for emulsion templates. The invention belongs to the technical field of adsorption and separation functional materials, and relates to a CO 2 The method for preparing the amidoxime functionalized hollow porous adsorbent as an emulsion template; the steps are: first prepare silicon dioxide nanoparticles and MF-HP; add MF-HP and PEA to ethanol, react through ultrasound, water bath, wash with water, Washed with ethanol and dried to obtain MF‑NH 2 ‑HP, added to glutaraldehyde aqueous solution, after water bath, water washing, alcohol washing, and drying to obtain MF‑CHO‑HP, then add DAMN to ethanol solution, after water bath, water washing, alcohol washing, and drying to obtain MF‑CN‑HP , add hydroxylamine hydrochloride to a mixed solution of water and ethanol, after the reaction, wash with water, wash with alcohol, and dry to obtain MF-AO-HPS; the present invention provides the possibility for subsequent modification of a large number of action sites by grafting PEA, and hollow porous The combination of the structure not only improves the adsorption capacity of adsorbed U(VI), but also accelerates the mass transfer kinetics.
Owner:HANGZHOU ENJOY ENVIRONMENTAL PROTECTION TECH
A kind of preparation method and application of citric acid grafted chitosan pellets
ActiveCN112871142BEasy to prepareNo heating requiredOther chemical processesWater contaminantsGlycanFreeze-drying
The invention discloses a preparation method and application of citric acid grafted chitosan pellets, belonging to the technical field of heavy metal adsorbents. The preparation method comprises the following steps: adding chitosan into the stirred CTAB solution, keeping the state of stirring, then adding citric acid, and mixing evenly to obtain a gel; pouring the obtained gel into a burette, and stirring it drop by drop drop into sodium hydroxide solution to collect wet gel balls; freeze-dry the obtained wet gel balls to obtain the citric acid grafted chitosan pellets. The pellets can greatly increase the adsorption capacity, have stronger selectivity to specific ions, can be applied to the removal and recovery of heavy metal elements, and can improve the stability of the pellets in water, and have good application prospects.
Owner:GUANGZHOU ENVIRONMENTAL PROTECTION TECH EQUIP
An Organic Electrochemical Transistor Sensor Based on Molecularly Imprinted Membrane
ActiveCN106770515BHigh sensitivityAchieve specific adsorptionMaterial electrochemical variablesFunctional monomerPower flow
Owner:HEFEI UNIV OF TECH
Naphthyl polyimide magnetic composite and its preparation method and application
ActiveCN110215912BUniform sizeGood dispersionOther chemical processesWater contaminantsSpecific adsorptionPolymer science
The invention discloses a naphthyl polyimide magnetic compound and its preparation method and application. The naphthyl polyimide magnetic compound includes magnetic Fe 3 o 4 The inner core and the SiO wrapped in turn outside the core 2 layer and a naphthyl polyimide layer, the naphthyl polyimide layer contains benzene rings, C=O, C-N, C-C and C=C bonds. In the present invention, the magnetic naphthyl polyimide polymer is bonded to the surface of magnetic nanoparticles through a covalent bond, and a composite material with multiple acting forces is prepared, and the naphthyl polyimide bonded to ferric oxide The amine material can not only provide the necessary specific surface area and pore structure as an extraction material, but also has a large number of conjugated benzene rings, which can have π‑π stacking and hydrophobic interactions with Sudan red molecules; the residual carboxyl groups can Hydrogen bonding occurs with the hydroxyl group in Sudan Red. The compound of the invention has large specific surface area, uniform pore size distribution, and can realize specific adsorption for some polar substances and substances with aromatic conjugated systems.
Owner:HENAN UNIV OF CHINESE MEDICINE
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