262 results about "Ion imprinted" patented technology

The invention provides an active/controllable graphene oxide surface ion imprinted polymer, and a preparation method and application thereof, belonging to the technical field of preparation and separation of materials, wherein the graphene oxide surface ion imprinted polymer is prepared from a coupling agent, a functional monomer, a cross-linking agent and an initiator by using graphene oxide as a substrate and metal ions as a template in a reversible addition-fragmentation chain transfer polymerization manner. The problems to be solved in the invention are as follows: the thickness of a surface polymer layer is uncontrollable; template molecules cannot be thoroughly eluted because of being embedded deeply; and the adsorption rate is low, etc; the graphene oxide surface ion imprinted polymer is mainly used for adsorbing corresponding metal ions in aqueous solution and has good absorption effect at room temperature and obvious selective separation effect; and the graphene oxide surface ion imprinted polymer can be reused frequently.

The invention discloses a preparation method of ion imprinted hydroxamic acid chelate resin. According to the invention, propenyl hydroxamic acid is subjected to coordination with imprinting metal ions such as manganese, copper, cobalt, nickel, lanthanum, cerium, yttrium, praseodymium, neodymium, and the like; under the effects of a crosslinking agent and an initiating agent, a propenyl hydroxamic acid-metal ion chelate is polymerized; and the imprinting metal ion is eluted, such that the ion imprinted hydroxamic acid chelate resin is obtained. The method provided by the invention has the advantages of mild reaction condition and high reaction efficiency. The prepared resin has the advantages such as high absorption capacity, high absorption selectivity, and the like.

The invention provides a preparation method and application a SiO2/GO surface metal ion imprinted polymer and belongs to the technical field of material preparation and separation. Particularly, silica/graphene oxide is used as a base, metal ions serve as a template, coupling agents, functional nonomers, cross-linking agents and initiators are used, reversible addition-fragmentation chain transfer polymerization serves as a polymerization mode, and the SiO2/GO surface metal ion imprinted polymer is prepared; the problems that the thickness of the surface polymer cannot be controlled, adsorption sites are not uniformly distributed, template molecules cannot be thoroughly eluted because they are wrapped too deep, the adsorption speed is low, the synthesis steps of chain transfer agents are complex, and time is consumed are solved; the SiO2/GO surface metal ion imprinted polymer is mainly used for selectively separating corresponding metal ions in a water solution, the selective separation effect is remarkable, and the polymer can be reused many times.

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 relates to a preparation method of a heavy metal ion imprinting polymer porous small ball and a film based on sulphonic acid resin. The molecular imprinting polymer small ball and film are prepared from a casting solution by a phase inversion method, wherein the casting solution comprises a linear polymer, the sulphonic acid resin, template heavy metal ions, a pore-forming agent and a solvent. The casting solution dropwise or linearly enters a coagulating bath by oscillation of a pinhead, and forms the polymer small ball or film after coagulating and shaping. The size dimension of the ion imprinting polymer porous small ball can be controlled by controlling the extrusion pressure and oscillation frequency. The ion imprinting polymer porous small ball or film has the porous characteristic, simultaneously forms metal ion imprinting sites in the polymer and on the surface of the polymer, can be used for removing heavy metal ions or enriching and recovering noble metal in water, and can be regenerated and cyclically used after acid washing.

The invention relates to a preparation method of a bionic dopamine-modified lithium-ion imprinted polyvinylidene fluoride (PVDF) membrane and application of the bionic dopamine-modified lithium-ion imprinted PVDF membrane, belonging to the technical field of environmental function materials. Polyvinylidene fluoride (PVDF) is taken as a base membrane material, surface hydrophilic modification is carried out through dopamine, and a dopamine membrane is formed on the surface to improve the adhesivity and the hydrophilcity of the membrane material; the surface modification is carried out by using a silane coupling agent to further improve the performance of the membrane; and finally the bionic dopamine-modified lithium-ion imprinted PVDF membrane with high selectivity and good adsorption property is prepared through an imprinting polymerization process. The preparation method has a relatively good application prospect.

The invention discloses a copper-ion-imprinted composite adsorbing material and a preparation method thereof. The preparation process comprises the following steps: respectively preparing chitosan acetic acid solution and sodium carboxymethyl cellulose/sodium hydroxide composite solidifying liquid, dripping the chitosan acetic acid solution into the sodium carboxymethyl cellulose/sodium hydroxidecomposite solidifying liquid to form spheres, placing into Cu<2+> for imprinting after washing, then using glutaraldehyde for crosslinking, then carrying out elution by using acid to remove Cu<2+>, washing and drying to obtain the copper-ion-imprinted composite adsorbing material. The copper-ion-imprinted composite adsorbing material prepared by the invention is millimeter-scale gel microspheres with uniform size, has good selective adsorption capacity for Cu<2+>, and can be recycled repeatedly; the raw materials are from natural polymers, so that no secondary pollution is caused; the preparation process is simple, the energy consumption is low, and the environment-friendly effect is achieved, so that the copper-ion-imprinted composite adsorbing material can be widely applied to treatmentof waste water and waste liquor containing copper ions.

The invention discloses a preparation method of surface-modified ion-imprinted polymer microspheres. The method comprises the following step: carrying out grafting reaction on a hydrophilic monomer, a first initiator, a first chain-transfer agent and ion-imprinted polymer microspheres in a first organic solvent to obtain surface-modified ion-imprinted polymer microspheres, wherein the grafting reaction temperature is 60-90 DEG C, and the grafting reaction time is 8-48 hours. The hydrophilic monomer is grafted to the surface of the ion-imprinted polymer microspheres, thereby enhancing the hydrophilicity of the surface-modified ion-imprinted polymer microspheres. The experimental result of the embodiment of the invention indicates that the contact angle of the surface-modified ion-imprinted polymer microspheres is 98.44 degrees, so the surface-modified ion-imprinted polymer microspheres are hydrophilic. Besides, the obtained surface-modified ion-imprinted polymer microspheres have excellent antijamming ability and stability.

The invention belongs to the field of analysis and detection of metal ions in water environment, and discloses a copper ion imprinted polymer, which comprises a polymer carrier and a functional monomer 1,4 - dihydroxy anthraquinone embedded in the polymer carrier, wherein the polymer carrier uses ethylene glycol dimethacrylate as a monomer. The preparation method comprises the following steps of: (1) mixing the 1,4 - dihydroxy anthraquinone with an organic solvent and a soluble copper salt, adding a crosslinking agent and an initiator agent, and reacting for 18 to 20hr at a temperature of 50 to 65 DEG C in the absence of oxygen; and (2) after washing, adding nitric acid to remove the copper ions. By a way that the functional monomer is embedded in a polymer network and a precipitation polymerization method, the imprinted polymer with selective adsorption for the copper ions is synthesized. The ion imprinted polymer has a specific recognition capability for the copper ions, and has better selectivity. Without connecting a double bond capable of being reacted with the crosslinking agent with the 1,4-dihydroxy anthraquinone in advance, the selection type and scope of the functional monomer is expanded, and the reaction steps are simplified.

The invention relates to a lithium-ion imprinted polymer and a preparation method thereof, and particularly provides a method for preparing an imprinted polymer which has high selective adsorption performance on lithium ions and prepared by performing grafting modification on orange peel cellulose serving as a substrate. The preparation method comprises the following steps: performing pre-treatment on the orange peel cellulose to obtain alkalified and alcoholized orange peel cellulose; performing alkylation and grafting reaction to obtain modified orange peel cellulose with a high-activity adsorption site; then, adding the modified orange peel cellulose into the aqueous solution of lithium ions; after adsorption equilibrium, adding a cross-linking agent for cross-linking and enclosing the adsorption site and the lithium ions to form a semi-closed space; finally, eluting the lithium ions by using a reclaiming agent to obtain the lithium-ion imprinted polymer with the high selective adsorption performance. The lithium-ion imprinted polymer has the advantages of low cost, stable performance, high selective adsorption performance on the lithium ions and the like, and is expected to be widely applied to the field of salt lake chemical industry, new energy and environmental protection to realize high-efficiency enrichment and extraction of the lithium ions.

The invention relates to imprinted polymers, and specifically relates to a preparation method of a copper ion imprinted chitosan composite material. The preparation method provided by the invention comprises the following steps: (1) depositing a surface activity SiO2 layer on Al2O3; (2) silylanizing Al2O3 on which the surface activity SiO2 layer is deposited; (3) preparing a Cu<2+>-chitosan complex; (4) preparing a copper ion imprinted chitosan composite material template; and (5) eluting, washing and drying. The preparation method provided by the invention is simple and feasible to operate, and the prepared composite material can effectively remove Cu<2+> in wastewater, and is low in energy consumption and free from secondary pollution.

The invention belongs to the field of high polymer material and environmental protection technology, and particularly relates to a preparation method of a lead ion imprinting crosslinking chitosan nanofiber adsorbing material applied to the wastewater containing lead. The method comprises the following steps of: preparing spinning solution by mixing the solution of chitosan and lead chloride and the solution of trifluoroacetic acid and dichloromethane according to a certain proportion; preparing the chitosan nanofiber adsorbing material by using an electrospinning process;and removing chelate ions by crosslinking agent crosslinking and solution washing treatments to obtain the lead ion imprinting crosslinking chitosan nanofiber adsorbing material. Lead ion adsorption experiments show that the adsorption amount of the adsorbing material for lead ions in the wastewater containing lead can reach 500-700mg/g, and the adsorption amount is far better than that of the traditional adsorbing material; and the preparation method of the absorbing material is simple and practical and has good promotional value.

Ion imprinted polymer materials are synthesized containing metal ion recognition sites. These particles are synthesized by copolymerizing with functional and cross linking monomers in presence of at least one imprint metal ion in the form of ternary complex. The polymerization was carried out by □-irradiation (in the absence of initiator) or photochemical and thermal polymerization (in presence of initiator, AIBN). These materials were ground and sieved after drying to obtain erbium ion imprinted polymer particles. The erbium ion was removed from the polymer particles by leaching with mineral acid which leaves cavities/binding sites in the polymer particles. The resultant polymer particles can be used as solid phase extractants for selective enrichment of erbium ions from dilute aqueous solutions.

The invention provides a comprehensive utilization method for orange peels, citrus junos peels and citrus maxima peels and belongs to the technical field of source comprehensive utilization. The orange peels, the citrus junos peels and the citrus maxima peels which are low in price are utilized, the orange peels, the citrus junos peels and the citrus maxima peels are digested for separating out flaudio-videoonoids, then graft modification is performed so that functional single bodies having site adsorption functions are grafted to the surface of cellulose, template ionic imprinting reaction is performed, and then closed adsorption is performed on empty sites by a cross-linking agent, so that ionic imprinting polymers having recognition and adsorption functions on specific ions are formed. The method can be widely applied to recognition and adsorption of various cations and can be used for achieving the comprehensive utilization of the orange peels, the citrus junos peels and the citrus maxima peels.

The invention discloses a preparation method of a copper ion-imprinted crosslinking chitosan microsphere, and belongs to the field of material science. The preparation method comprises the following steps of using copper ions as template ions, using chitosan as a functional monomer, using epichlorohydrin as a crosslinking agent, and eluting the copper ions by hydrochloric acid, so as to prepare the copper ion-imprinted crosslinking chitosan microsphere. The prepared copper ion-imprinted crosslinking chitosan microsphere has higher adsorption ability and selective adsorption property on the copper ions, and has the advantages that the adsorption and eluting speeds are quick, the operation is simple and is easy to implement, and the regeneration and recycling effects are realized.

The invention relates to a method for remediating uranium contaminated water with an imprinted fungal material having high affinity and high recognition capability to uranyl ions. An uranium ion imprinted material is prepared by means of the sol-gel technique from a typical facultative marine mangrove endophytic fungus Fusarium sp.#ZZF51 as a matrix, phytic acid as a functional monomer, UO2<2+> as a template ion, and tetraethoxysilane (TEOS) as a cross-linking agent; then, the obtained material is thrown in uranium contaminated water to remediate the uranium contaminated water; and after a period of time, the material is retrieved and subjected to centralized treatment. The material proposed provided by the invention has high affinity and high recognition capability to uranyl ions, and may lead to a removal rate of uranyl ions of 90% or above 50-70 min later after being thrown in water. The imprinted fungal material is in the form of spherical granules, and is low in cost, high in remediation efficiency, environmentally friendly without secondary pollution, and relatively simple and convenient in retrieval and centralized treatment.

The invention provides a gridless AlGaN/GaN field effect transistor sensor. According to the gridless AlGaN/GaN field effect transistor sensor, electrodes are arranged on an AlGaN/GaN heterojunction substrate via vapor deposition; the gridless AlGaN/GaN field effect transistor sensor also comprises a passivation layer; a whole source end electrode, a source end electrode PAD, a leakage end electrode, and a leakage end electrode PAD are covered by the passivation layer; the passivation layer used for covering the source end electrode PAD and the leakage end electrode PAD is provided with windows via etching until the PADs are exposed; the gridless AlGaN/GaN field effect transistor sensor also comprises an ion imprinted polymer layer, the ion imprinted polymer layer is arranged on an AlGaN layer, and possesses imprinting holes. The invention also discloses a preparation method of the gridless AlGaN/GaN field effect transistor sensor. The conductive polymer nano composite material possesses single ion identification performance, is capable of improving selective adsorption and anti-interference performance of devices, is capable of realizing quick response and high accuracy quantitative determination, can be reused conveniently and quickly after washing with NaCl solution, is convenient to use, is low in cost, and can be used for water quality on-line monitoring.