47 results about "Polymer functionalization" patented technology

The invention relates to a preparation method of two fluorescence mesoporous silica nano-particles, and belongs to the field of fluorescence nano-materials. According to the invention, an in-situ formation method is firstly adopted; 8-hydroxyquinoline is directly coordinated with zinc ions complexed in mesoporous silica, and conjugated polymer polyphenyleneethynylene precursor disulphonium salts are directly introduced into mesoporous silica nano-particles through an ion exchange process; and thus a fluorescence mesoporous silica nano-material is obtained with stable chemical and thermodynamic properties, which is a mesoporous silica nano-particle functionalized by 8-hydroxyquinoline and fluorescence conjugated polymer. Based on the high specific surface area, stable fluorescence performance, good dispersibility and biocompatibility of the fluorescence mesoporous nano-material, the prepared fluorescence mesoporous nano-material is applicable to biological aspects such as drug slow release, cell marking, gene vector, and the like.

The present invention discloses polymer functionalized molecular sieve/polymer mixed matrix membranes (MMMs) with either no macrovoids or voids of less than several Angstroms at the interface of the polymer matrix and the molecular sieves by incorporating polyethersulfone (PES) or cellulose triacetate (CTA) functionalized molecular sieves into a continuous polyimide or cellulose acetate (CA) polymer matrix. The MMMs, in the form of symmetric dense film, asymmetric flat sheet membrane, or asymmetric hollow fiber have good flexibility and high mechanical strength, and exhibit significantly enhanced selectivity and/or permeability over the polymer membranes made from the corresponding continuous polymer matrices for carbon dioxide/methane (CO₂/CH₄) and hydrogen/methane (H₂/CH₄) separations. The MMMs are suitable for a variety of liquid, gas, and vapor separations such as deep desulfurization of gasoline and diesel fuels, ethanol/water separations, pervaporation dehydration of aqueous/organic mixtures, CO₂/CH₄, CO₂/N₂, H₂/CH₄, O₂/N₂, olefin/paraffin, iso/normal paraffins separations, and other light gas mixture separations.

An ultraviolet light sensor includes an elongated metal oxide nanostructure, a layer of an ultraviolet light-absorbing polymer, a current source and a current detector. The elongated metal oxide nanostructure has a first end and an opposite second end. The layer of an ultraviolet light-absorbing polymer is disposed about at least a portion of the metal oxide nanostructure. The current source is configured to provide electrons to the first end of the metal oxide nanostructure. The current detector is configured to detect an amount of current flowing through the metal oxide nanostructure. The amount of current flowing through the metal oxide nanostructure corresponds to an amount of ultraviolet light impinging on the metal oxide nanostructure.

The present invention discloses polymer functionalized molecular sieve/polymer mixed matrix membranes (MMMs) with either no macrovoids or voids of less than several Angstroms at the interface of the polymer matrix and the molecular sieves by incorporating polymer functionalized molecular sieves into a continuous polymer matrix. The MMMs exhibit significantly enhanced selectivity and/or permeability over the polymer membranes made from the corresponding continuous polymer matrices for separations. The MMMs are suitable for a variety of liquid, gas, and vapor separations such as deep desulfurization of gasoline and diesel fuels, ethanol/water separations, pervaporation dehydration of aqueous/organic mixtures, CO₂/CH₄, CO₂/N₂, H₂/CH₄, O₂/N₂, olefin/paraffin, iso/normal paraffins separations, and other light gas mixture separations.

The invention discloses the use of polymer functionalized molecular sieve/polymer mixed matrix membranes (MMMs) with either no macrovoids or voids of less than several Angstroms at the interface of the polymer matrix and the molecular sieves by incorporating polyethersulfone (PES) or cellulose triacetate (CTA) functionalized molecular sieves into a continuous polyimide or cellulose acetate (CA) polymer matrix. The MMMs, particularly PES functionalized AlPO-14/polyimide MMMs and CTA functionalized AlPO-14/CA MMMs, in the form of symmetric dense film, asymmetric flat sheet membrane, or asymmetric hollow fiber have good flexibility and high mechanical strength, and exhibit significantly enhanced selectivity and/or permeability over the polymer membranes made from the corresponding continuous polymer matrices for carbon dioxide/methane (CO₂/CH₄), hydrogen/methane (H₂/CH₄), propylene/propane separations and a variety of liquid, gas, and vapor separations.

The invention relates to a method for preparing benzoxazole functionalized graphene hybrid materials, which comprises the steps of: preparation of graphene oxide, synthesis of a polybenzoxazole polymer with a two-step method, preparation of a polybenzoxazole polymer functionalized graphene and the like. The preparation method disclosed by the invention has the positive effects of successfully preparing the benzoxazole functionalized graphene hybrid materials which are interlinked by amido bonds by means of condensation and thermal reduction of acyl chloride and amino, solving the problem on the uniform scattering of graphene in acid media with pH of smaller than 7, and laying the foundation for further preparation of graphene benzoxazole composite materials with stable homogeneous phase and excellent performance.

The invention provides a method used for high efficiency adsorbing of heavy metals with a functionalized magnetic material rich in thio amino groups, relates to preparation of a thio amino functional group modified hyperbranched polymer magnetic material, belongs to the field of functional material and heavy metal adsorption, and more specifically relates to removing of Pb2+, Cu2+, Cd2+, and Hg2+ in aqueous solutions with a hyperbranched polymer functionalized magnetic compound material with terminal amino groups modified with sulfur-containing chelation groups via static adsorption. The terminal amino group hyperbranched polymer contains a high molecular weight polymer with a network ball similar three-dimensional structure which is capable of increasing the density of surface functional groups. Compared with linear polymers, the polymer with the hyperbranched structures possesses following advantages: molecular chain entanglement is not easily caused, solubility is high, viscosity is low, the molecular structure is spherical, the interior of the polymer is provided with a large amounts of cavities, and the molecular surfaces possess a large number of reaction active sites, so that it is benefit for introduction of certain chelation groups, and the polymer is capable of increasing adsorbing efficiency in application in adsorption field. The polymer is capable of removing heavy metal ions such as Pb2+, Cu2+, Cd2+, and Hg2+ in aqueous solutions completely; the adsorbing materials are widely available; cost is low; operation is simple; removing effect is achieved quickly; and efficiency, selectivity, and adsorption capacity are high.

The invention discloses polymer functional graphene and a preparation method and application thereof. Graphene is connected with a polymer through the combination of at least one of imide, amide, ester groups and amidogen, wherein the polymer is a polymer at least containing one benzene ring and with the molecular weight of 200-500,000 and interacts with the graphene through covalent bonds, hydrogen bonds and/or pi-pi conjugation. The polymer functional graphene is excellent in dispersion property in non-polar solvents and excellent in dispersion stability, and cannot precipitate after long-time storage for multiple months; according to the adopted preparation method, the polymer with amidogen, hydroxyl and carboxyl reacts with epoxy, hydroxyl and the like on the graphene and then is subjected to covalent grafting on the surface of the graphene, and the grafting rate of the polymer reaches 30% or above. In addition, the obtained polymer functional graphene can be widely applied to lubricating oil, plastic, rubber, paints, adhesives, fibers and other fields, and has potential application value.

The invention provides hydrophilic polymer functional magnetic nanospheres as well as a preparation method and an application thereof to solve the problems that few magnetic hydrophilic matrix types exist, the preparation condition is harsh and operation is tedious. According to the technical scheme, the magnetic nanospheres take Fe3O4 as the core, after surface double bond functionalization, a hydrophilic polymer is formed on the surface of Fe3O4 through a precipitation polymerization reaction. The preparation method of the magnetic nanospheres comprises steps as follows: (1) preparation of Fe3O4 magnetic nanospheres with a solvothermal method; (2) surface double bond modification of the magnetic nanospheres; (3) preparation of hydrophilic functional magnetic nanospheres: the magnetic nanospheres are used as an adsorbent used for separation and enrichment of glycopeptide or glycoprotein. The magnetic nanospheres are prepared from simple components, are easy to produce, adopt mild reaction conditions, can be used for efficient and high-selectivity separation and enrichment, can be applied to enrichment of glycopeptide or glycoprotein in complex biological samples and have remarkable economic and social benefit.

The invention relates to a mixture applied to reactivity coagulating bath. The mixture comprises a prepolymer, a first organic solvent and water, wherein the prepolymer is obtained through polymerization of a functional monomer and a silane coupling agent under the action of an initiator. The invention further provides a preparation method of a polymer microporous membrane by utilizing the mixtureapplied to reactivity coagulating bath. In specific, a primary membrane is placed in the reactivity coagulating bath for curing to obtain the polymer microporous membrane; during the separating process, the prepolymer in the reactivity coagulating bath is transferred to between polymer molecular chains of the primary membrane and has self-crosslinking to realize functionalization modification ofthe polymer.

The present disclosure relates, according to some embodiments, to a method of slowing the growth of at least one microorganism on a surface, the method may comprise: applying a plurality of pellets to the surface, wherein each pellet of the plurality of pellets may comprise a polymer matrix and an antimicrobial agent, wherein the antimicrobial agent is dispersed throughout the volume of the polymer matrix, wherein natural weathering of the plurality of pellets releases the antimicrobial agent at a substantially uniform rate over a period of about or more than 20 years, and wherein the release of the antimicrobial agent slows the growth of microorganisms on a surface.

Disclosed are conjugated polymers bearing chemical probes and the use thereof for the preparation of chemical sensors based on carbon nanotubes allowing the selective detection of analytes in water.

The invention discloses a vinyl sulfone-substituted cysteine-N-carboxyanhydride, a polymer thereof and application of the polymer. Preparation comprises the following steps: preparing a vinyl sulfone-substituted cysteine-N-carboxyanhydride monomer; preparing a vinyl sulfone-modified polymer from the monomer; and finally, performing side chain modification on the polymer to prepare a functional polymer, a functional polymer film and injectable hydrogel. According to the invention, vinyl sulfone functional groups are not influenced by the preparation of the -N-carboxyanhydride monomer and the polymer, so that steps of protection and deprotection are not needed in the whole preparation process of the polymer; the prepared vinyl sulfone-modified polymer can be easily prepared into the functional polymer, the functional polymer film and the injectable hydrogel through Michael addition reaction at room temperature without the presence of a catalyst; and these materials can be used for preparation of tissue engineering scaffolds and medicinal slow release carriers.

The invention relates to the preparation and application of a Sn electrode for electrochemical reduction of carbon dioxide, comprising a base layer and a Sn catalyst layer containing a sulfonate polymer material attached to the base layer. The preparation steps are: treating carbon felt or carbon paper , and then carry out degreasing treatment and cleaning in ethanol and acetone; electrochemical tin plating on the surface of the above-mentioned base layer by means of potential to obtain a Sn catalyst layer; under the protection of an inert atmosphere, the electrolyte solution is subjected to different constant current densities. Electrodeposit Sn on the bottom layer, and wash and dry the electrodeposited Sn catalyst layer with ethanol and water; perform a reduction reaction on the base layer on which the Sn catalyst layer is deposited in a post-treatment electrolyte; After drying in a vacuum oven, an electrode with a sulfonate-containing polymer-functionalized Sn catalyst was prepared. The invention can make the macromolecular material evenly grafted on the Sn surface, improve the stability of the electrode, and increase the proton concentration on the electrode surface.

The invention discloses an osmium-containing conjugated polymer as well as a preparation method and application thereof. The osmium-containing conjugated polymer has a structural formula as shown in the specification. The osmium-containing conjugated polymer prepared by the preparation method disclosed by the invention is high in solubility, good in stability, relatively high in molar absorption coefficient and relatively good in electrochemical performance, and linking groups with different function orientations can be introduced, so that the osmium-containing conjugated polymer is functionalized. The preparation method provided by the invention has the advantages of simple and efficient polymerization route, mild reaction conditions, good functional group tolerance and good universality. The osmium-containing conjugated polymer can be widely applied to the fields of solar cells, light-emitting diodes, field effect transistors, chemical sensors, chemical switches and the like.

The invention provides a comb-type polyether sulphone material containing a long side group structure and a preparation method thereof. The preparation method comprises the following steps: under the nitrogen protection, respectively adding a certain amount of three monomers into a reaction bottle, such as active bisphenol containing the long side group structure, biphenol and 4,4apostrophe-difluorodiphenyl sulfone, and adding a proper amount of solvent and dewatering agent; under the function of an alkaline catalyst, performing aromatic nucleophilic substitution condensation polymerization reaction, so as to obtain the comb-type polyether sulphone material containing the 3,5apostrophe-dimethylphenoxy benzene long side group structure. The comb-type polyether sulphone material containing the long side group structure has the advantages that the dissolving film forming property is good, and a prepared thin film has important application value in the gas separating film field; by performing the polymer functionalizing reaction, the high-property anion exchange membrane material is prepared.

The invention relates to the field of new materials, in particular to a preparation method of a chiral ZIF-8 (at) MXene/CA composite porous material, which comprises the following steps: preparing chiral ZIF-8 by using D-histidine as a chiral ligand, adding etched and peeled Ti3C2-MXene to prepare a chiral ZIF-8 (at) MXene material, then adding sodium carboxymethyl cellulose and polyethylene glycol diglycidyl ether to functionalize a polymer, and preparing the chiral ZIF-8 (at) MXene/CA composite porous material. And finally, carrying out freeze drying to obtain the chiral ZIF-8 (at) MXene/CA material. The method is mild in reaction condition and simple in process, and the prepared composite porous material is large in specific surface area, high in selectivity and stable in mechanical property and can be used as a solid-phase extraction monolithic column of a chiral compound.