49 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.

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 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.

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 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.