50 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.

A composition of a surface-treated-carbon-black and a functionalized polymer with functionalization along the polymer chain is disclosed, wherein the polymer represents a solution SBR including, but not limited to blends of the SBR (PBR4003) with BR, NR and EPDM, and the SBR polymer functionalization comprises polar, oxygen-containing functional groups, such that the compound exhibits reduced hysteresis and rolling resistance, improved wet traction with excellent abrasion resistance as would be used in passenger, truck and racing tires.

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 provides two methods for synthesizing novel titania-polyurethane (nTiO2-PU) nanocomposites for self-cleaning coatings, one a polymer functionalization method (“grafting to”) and the other, a monomer functionalization method (“grafting from”). Here, 2,2 bis(hydroxymethyl) propionic acid (HMPA) was used as the coordination agent, which was reacted with n-TiO2 (50:50 anatase / rutile) to form nTiO2-HMPA, then polymerized in the monomer functionalization method. In the polymer functionalization method, HMPA was reacted with a pre-polymer to form the PU, and then subsequently reacted with n-TiO2 to form the polymer nanocomposite. The photocatalytic cleanability of the nanocomposites was investigated when exposed to ultraviolet radiation using additional unreacted HMPA or stearic acid as the model “dirt” compounds. Nanocomposites prepared using both strategies showed similar self-cleaning behavior, although the monomer technique gave less substrate degradation.

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 discloses a hyperbranched polymer functionalized mesoporous material and application thereof. The preparation method comprises the following steps: carboxylating cyano-modified mesoporous silicon synthesized by copolycondensation, thereby obtaining carboxyl functionalized mesoporous silicon; and grafting an amino-terminated hyperbranched polymer on the carboxyl functionalized mesoporous silicon by adopting a 'grafting to' strategy, thereby obtaining a carboxylated mesoporous silicon / amino-terminated hyperbranched polymer hybrid material. The macroscopical shape of functionalized mesoporous material provided by the invention is low-density powder, the microstructure is regular and ordered, the functionalized mesoporous material is generally a two-dimensional hexagonal p6mm porous structure and is large in specific surface area, the pore surface is coated with hyperbranched organic functional components, and the functionalized mesoporous material is enriched in active adsorption sites, has good capacity of adsorbing heavy metal ions and organic dye pollutants and can be applied to the field of wastewater treatment or functional carriers.

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 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 brush-type hydrazine-polymer functionalized magnetic nano-material, preparation and application thereof to enriching of glycopeptide or glycoprotein. After a reversible addition-fragmentation chain transfer (RAFT) reagent is introduced into the surface of a nano-material, an organic polymerization reaction functional monomer and an organic polymerization reaction initiator are added, the organic functional monomer is subjected to controllable free-radical polymerization under the regulation and control of the reversible addition-fragmentation chain transfer reagent, so that the brush-type polymer organic-inorganic hybrid nano-material is prepared. The organic-inorganic hybrid nano-material is simple in preparation process and mild in reaction conditions, and is applicable to enriching of glycopeptide or glycoprotein in a complex biological sample.

The present invention is directed to a novel poly (diol citrates)-based coating for implantable devices. More specifically, the specification describes methods and compositions for making and using implantable devices coated with citric acid copolymers or citric acid copolymers impregnated with therapeutic compositions and / or cells.

The invention belongs to the technical field of medicines, relates to polymer functionalized modified mesoporous carbon nanoparticles and preparation and application thereof, particularly relates to polymer functionalized modified mesoporous carbon nanoparticles capable of overcoming multiple gastrointestinal absorption barriers and a drug delivery system prepared from the nanoparticles, and alsorelates to application of the nanoparticles as insoluble drug carriers in promoting oral drug absorption. According to the invention, firstly, chitosan is covalently modified on the surfaces of the mesoporous carbon nanoparticles for improving intestinal uptake of carriers; and a hydrophilic and negatively charged N-(2-hydroxypropyl) methacrylamide copolymer (pHPMA) is adsorbed to the surfaces ofthe nano carriers through electrostatic force, so that the mucus permeability of the carriers is improved. According to an administration system constructed by the invention, drug is highly dispersedin mesoporous pore channels of the carriers in a nanometer size, so that the drug exists in an amorphous state, and oral absorption of the insoluble drug is promoted.

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.

Ice-resistant paint comprising an ice-resistant base component that in turn comprises a main component entailing a high solid paint with a synthetic polyurethane-based binding component dissolved in a main organic solvent, and a hydrophobe component consisting of hydrophobic ice-resistant functional nanoparticles selected from among nanoparticles functionalized with a polymer and nanoparticles functionalized in sol-gel, where the ice-resistant paint comprises a mixture of the main component with a dispersion of functional nanoparticles dispersed in a dispersing composition constituting the main solvent and a dispersant, and forms a base matrix, where the dispersing composition and functional nanoparticles form a dispersion of nanoparticles in which the functional nanoparticles are in the base matrix, and the dispersion of dispersing nanoparticles mixed with the main component to form an ice-resistant base component of the ice-resistant paint.

Disclosed herein is a sequential functionalization methodology for the covalent modification of nanotubes with between one and four repeat units of a polymer. Covalent attachment of oligomer units to the surface of nanotubes results in oligomer units forming an organic sheath around the nanotubes, polymer-functionalized-nanotubes (P-NTs). P-NTs possess chemical functionality identical to that of the functionalizing polymer, and thus provide nanoscale scaffolds which may be readily dispersed within a monomer solution and participate in the polymerization reaction to form a polymer-nanotube / polymer composite. Formation of polymer in the presence of P-NTs leads to a uniform dispersion of nanotubes within the polymer matrix, in contrast to aggregated masses of nanotubes in the case of pristine-NTs. The covalent attachment of oligomeric units to the surface of nanotubes represents the formation of a functional nanoscale building block which can be readily dispersed and integrated within the polymer to form a novel composite material.

Ice-resistant paint comprising an ice-resistant base component that in turn comprises a main component entailing a high solid paint with a synthetic polyurethane-based binding component dissolved in a main organic solvent, and a hydrophobe component consisting of hydrophobic ice-resistant functional nanoparticles selected from among nanoparticles functionalized with a polymer and nanoparticles functionalized in sol-gel, where the ice-resistant paint comprises a mixture of the main component with a dispersion of functional nanoparticles dispersed in a dispersing composition constituting the main solvent and a dispersant, and forms a base matrix, where the dispersing composition and functional nanoparticles form a dispersion of nanoparticles in which the functional nanoparticles are in the base matrix, and the dispersion of dispersing nanoparticles mixed with the main component to form an ice-resistant base component of the ice-resistant paint.

A method is provided for fabricating a metalloporphyrin polymer on a substrate. The method creates a functionalized substrate by attaching an anchor group of a linker, including a terminal alkyne group, to a substrate surface. The functionalized substrate is then exposed to metalloporphyrin monomers, where each metalloporphyrin monomer includes at least two terminal alkyne groups. A plurality of metalloporphyrin monomers (e.g., zinc porphyrin monomers) are thus linked via the metalloporphyrin monomer terminal alkyne groups, forming a metalloporphyrin polymer attached to the substrate. In one aspect, linking the plurality of metalloporphyrin monomers via the metalloporphyrin monomer terminal alkyne groups includes forming butadiyne groups between adjacent metalloporphyrins. Then, forming the metalloporphyrin polymer attached to the substrate includes attaching the metalloporphyrin polymer, via a metalloporphyrin monomer terminal alkyne group, to the terminal alkyne group of an associated linker. Alternatively stated, the metalloporphyrin polymer is attached to the substrate via a polyalkyne group.

The subject matter described herein relates to methods for polymer xanthylation and the xanthylated polymers produced by such methods. Subsequent replacement of the xanthylate moiety allows facile entry into functionalized polymers.

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.

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 invention discloses an osmium-containing conjugated polymer, a preparation method and application thereof. The structural formula of the osmium-containing conjugated polymer is its reaction formula: the prepared osmium-containing conjugated polymer has high solubility, good stability, high molar absorptivity and good electrochemical performance, and can be introduced into Different functionally oriented linkers to functionalize osmium-containing conjugated polymers. 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 used in the fields of solar cells, light emitting diodes, field effect transistors, chemical sensors, chemical switches and the like.

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 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.