228 results about "Sulfonated polymer" patented technology

In accordance with various aspects of the invention, implantable and insertable medical devices are provided, which contain one or more polymeric regions. In one aspect, the polymeric regions comprise (a) a block copolymer that comprises a polyaromatic block and a polyalkene block admixed with (b) a sulfonated high Tg polymer. In another aspect, the polymeric regions comprise a block copolymer that comprises (a) a sulfonated polymer block and (b) fluorinated polymer block.

The present invention pertains to products and processes relating to compatible polymer blends comprising at least one sulfonated polymer and at least one non-sulfonated polymer. The sulfonated polymers may be produced using a number of sulfonating agents including a coordination complex of sulfur trioxide. The polymeric blended materials described herein are useful in a variety of applications, including as coatings for medical devices, protective clothing and fabric, laboratory equipment, vascular stents and shunts, absorbent materials and separation membranes, three-dimensional constructs, devices, and other uses.

A composition comprising particulate carbonaceous material and a sulfonated conducting polymer containing hetero atoms. The composition can further comprise a metal. Devices comprising the composition can be constructed including supported electrocatalysts, membrane electrode assemblies, and fuel cells. A method for preparing the composition comprises oxidatively polymerizing with ozone a monomer of a conducting polymer containing hetero atoms in the presence of a carbonaceous material and sulfonating the polymer or the monomer. The method grafts the sulfonated conducting polymer to the carbonaceous material. The method can further comprise metallizing the polymer-grafted carbonaceous material.

The invention discloses a method for preparing sulfonated polymer films, which comprises the following steps: preparing a casting solution and film-forming on the basis of phase-inversion. The sulfonation reaction is carried out between one or two of polyether-ether-ketone (PEEK), phenolphthalein polyaryl ether sulfone (PES-C) or polystyrene (PS) and concentrated sulfuric acid, fuming sulfuric acid or chlorosulfonic acid to obtain a sulfonated polymer solution in the preparation of the casting solution; and then, the film is directly formed on the basis of the phase-inversion method. The sulfonated polymer film prepared by the invention has higher pure water flux and protein retention rate, furthermore, the method has the advantages of good anti-pollution performance, higher mechanical strength and simple preparation process.

A membrane electrode assembly for a fuel cell is described. The materials for the membrane electrode assembly are formed from sulfonated polymers. A polymer dispersion ink containing the sulfonated polymer and a mixture of solvents is used to form the electrodes on the exchange membrane. The dispersion ink allows for the electrodes to be formed directly on the exchange membrane without significantly dissolving the exchange membrane.

Provided is a surface-stabilized anode active material particulate (for use in a lithium battery), comprising: (a) one or a plurality of prelithiated or un-prelithiated anode active material particles (with or without a coating of carbon, graphene, or ion-conducting polymer); (b) a protecting polymer layer that wraps around, embraces or encapsulates the one or plurality of anode active material particles, wherein the protecting polymer layer has a thickness from 0.5 nm to 5 μm, and a lithium ion conductivity from 10⁻⁸ S/cm to 5×10⁻² S/cm at room temperature and the protecting polymer layer contains a polymer selected from poly(ethylene oxide) (PEO), polypropylene oxide (PPO), poly(acrylonitrile) (PAN), poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride) (PVdF), poly bis-methoxy ethoxyethoxide-phosphazene, polyvinyl chloride, poly(vinylidene chloride), polydimethylsiloxane, poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP), polyethylene glycol (PEG), a PEG derivative, polyethylene glycol methyl ether, polyethylene glycol dimethyl ether, a sulfonated polymer, or a combination thereof.

The invention relates to a porous membrane for a flow battery and with a hierarchical pore structure, and preparation and application thereof. According to the invention, one or more selected from a group consisting of organic polymer resin or sulfonated polymer resin are used as raw materials; a porous membrane prepared with micromolecular particles as a hard template is used as a matrix; an immerged phase inversion process is employed for curing and film formation; and a template agent is removed so as to prepare the porous membrane with the hierarchical pore structure. The porous membrane with the hierarchical pore structure is simple and environment-friendly to prepare, and has controllable pore size and porosity, and batch production of the porous membrane with the hierarchical pore structure can be easily realized. Compared with the original porous membrane, the porous membrane with the hierarchical pore structure has the advantage that the pore structure can be controlled by controlling the content of the template agent; and a battery prepared from the porous membrane with the hierarchical pore structure has good capacity retention ratio and battery efficiency.

The invention relates to a mixed matrix type cation exchange membrane and a preparation method thereof. The cation exchange membrane takes a sulfonated modified polymer material as a substrate and isdoped with Schiff base type covalent organic framework materials loaded with different functional groups. The preparation method comprises the following steps of: sequentially performing monomer preparation and polymerization of a covalent organic framework material, sulfonation modification of a polymer, uniform mixing of the covalent organic framework material and a sulfonated polymer, and flow-spreading film formation; and finally, performing acid treatment to obtain the cation exchange membrane. The covalent organic framework material can effectively improve the vanadium resistance of themembrane based on the rigid porous structure; the organic porous structure of the covalent organic framework and the different functional modifications can partially compensate the loss of membrane proton conductivity caused by the introduction of particles; the rigid framework can obviously inhibit the swelling in the membrane and can improve the tensile strength of the membrane; COFs is composedof organic structures and can promote compatibility between sulfonated polymers and covalent organic framework materials; and moreover, the polymer as the substrate can improve the film forming performance of the covalent organic framework material, so that the covalent organic framework material has the better mechanical strength.

The invention discloses a nanocellulose/sulfonated polyaryletherketone composite film as well as a preparation method and application of the nanocellulose/sulfonated polyaryletherketone composite film, belonging to the technical field of proton conduction films of fuel cells. The mass ratio of nanocellulose to sulfonated polyaryletherketone in the composite film is (0.01-0.05): (0.45-0.49), and the nanocellulose is preferably nanocellulose containing a sulfonic group and hydroxyl. The preparation method comprises the steps of firstly, polymerizing a monomer with the sulfonic group or directly sulfonating a polymer to obtain sulfonated polyaryletherketone; and then, carrying out solution blending on sulfonated polyaryletherketone and the nanocellulose subjected to refining treatment and surface modification to prepare the nanocellulose/sulfonated polyaryletherketone composite film. The composite film disclosed by the invention can be used as a proton conduction film of a fuel cell; the film is 10-300mu m thick and has the proton conductivity of more than 10<-2>S/cm at the temperature of 20-150 DEG C, meanwhile, the permeability coefficient of methanol is reduced, and the size stability and the water absorptivity are improved.

The invention belongs to the field of a high molecular material, which in particular relates to a polymer with lateral chains containing benzoglioxaline groups in the seires of sulfonated poly aryl ether ketone used for proton-exchange membranes of high-temperature fuel cells, and a preparation method thereof. Firstly, bisphenol monomers with lateral chains linked with carboxyls, fluorine-terminated monomers and sulfonated fluorine-terminated monomers react to prepare a sulfonated polyaryletherketone polymer with skeleton connected with carboxy groups; the degree of sulphonation of the polymer can be adjusted between 0 to 2 by adjusting the ratio of fluorine-terminated monomers and the sulfonated fluorine-terminated monomers. Subsequently, benzoglioxaline groups are introduced onto the lateral chain of the sulfonated polymer by adding ortho-phenylene diamine. Polyaryletherketone of different degrees of sulphonation with lateral chains containing benzoglioxaline groups can be prepared by adjusting the ratio of the sulfonated monomers and unsulfonated monomers. A series of membranes prepared are promising in application in the field of fuel cell membranes, in particular at high temperature.

Disclosed is a composite electrolyte membrane comprising a microporous polymer substrate and a sulfonated polymer electrolyte. The composite electrolyte membrane comprises: a first polymer electrolyte layer formed of a first non-fluorinated or partially-fluorinated sulfonated polymer electrolyte; a non-fluorinated or partially-fluorinated microporous polymer substrate stacked on the first polymer electrolyte layer, wherein pores of the microporous polymer substrate are impregnated with a second non-fluorinated or partially-fluorinated sulfonated polymer electrolyte, and the first polymer electrolyte and the second polymer electrolyte are entangled with each other on an interface thereof; and a third polymer electrolyte layer formed on the microporous polymer substrate impregnated with the second polymer electrolyte by a third non-fluorinated or partially-fluorinated sulfonated polymer electrolyte, wherein the second polymer electrolyte and the third polymer electrolyte are entangled with each other on an interface thereof. A method for manufacturing the composite electrolyte membrane, and a membrane-electrode assembly (MEA) and a fuel cell comprising the composite electrolyte membrane are also disclosed.

The invention discloses a method for preparing a polybenzimidazole/sulfonated polymer composite proton exchange membrane material, and belongs to the technical field of preparation of functional polymer materials. The method comprises the following steps of: transforming a sulfonated polymer into a sulfonate polymer by alkali treatment, dissolving the sulfonate polymer in an organic solvent, and adding a catalyst, and tetramine monomers and dialdehyde monomers in an equimolar ratio; and stirring the mixture to obtain membrane making liquid; making a membrane and transforming the membrane to obtain the polybenzimidazole/sulfonated polymer composite proton exchange membrane material, wherein the tetramine monomers are one or any combination of compounds which have the molecular structures shown in the specifications; and each component has the advantages of uniform dispersion and simple operation. The prepared polybenzimidazole/sulfonated polymer composite proton exchange membrane material has the advantages of high mechanical strength, high electric conductivity, great improvement on dimensional stability, methanol permeability and temperature tolerance, and suitability for the fields of direct methanol fuel cells (DMFCs), the proton exchange membranes of proton exchange membrane fuel cells (PEMFCs), ion exchange resin, membrane separation, sensors and the like.

The invention discloses polybenzimidazole containing an ether ketone/ether sulfone structure and a sulphonated polymer and a preparation method thereof. The chain structure of a polybenzimidazole polymer containing the ether ketone/ether sulfone structure also has the structure of ether ketone or ether ether ketone or ether sulfone and imidazole; besides the structure of ether ketone or ether ether ketone, the chain structure of the sulphonated polymer of the polybenzimidazole containing ether ketone/ether sulfone structure also has the structure of sulfonic group and imidazole. The preparation method adopts the steps that a bisphenol-bisbenzimidazole monomer and a difluoro monomer or a fluoride bearing monomer are used as the raw material, anhydrous sodium carbonate or anhydrous potassium carbonate is used as the catalyst, nucleophilic condensation polymerization reaction is performed in an aprotic polar solvent, and after the reaction liquid is post-treated, the polybenzimidazole polymer of the sulphonated polymer containing ether ketone/ether sulfone structure is obtained. The polymer obtained through the invention has good oxidation resistance, thermostability, acidproof and alkali proof stability, and alcohol inhibition performance, and the synthetic method is simple, thereby the polybenzimidazole has broad application prospect.

A method of cementing a wellbore comprising preparing a cement composition comprising a water-soluble aromatic sulfonated polymer, and placing the cement composition into the wellbore, wherein the cement composition develops a compressive strength of greater than about zero in less time than a similar cement composition having a comparable thickening time and lacking a water-soluble aromatic sulfonated polymer. A cement composition comprising a water-soluble aromatic sulfonated polymer, wherein the cement composition develops a compressive strength of greater than about zero in less time than a similar cement composition having comparable thickening time and lacking a water-soluble aromatic sulfonated polymer.

The invention relates to a sulfonated polymer applied to a lithium battery electrode as a binder as well as a method for preparing the lithium battery electrode. The sulfonated polymer is used as the binder in electrode slurry of the lithium battery electrode, the obtained lithium battery electrode is used for assembling a lithium battery, and the lithium battery is relatively long in charging-discharge cycle life and stable in work under a relatively high current density. The sulfonated polymer with a sulfonic acid group has excellent capacity of transferring lithium ions, so that the lithium ions can be rapidly transmitted back and forth between an electrode active material and an electrolyte, and the lithium battery which is stable to run under the rapid charging-discharging condition can be obtained. The sulfonated polymer which is used as the binder is sufficient in cohesion force and binding strength, and the electrode active material and a conductive medium are stuck onto a current collector by the sulfonated polymer and are unlikely to fracture and dust, so that the lithium battery has sufficient capacity and cycle performance as well as excellent rate capacity.

The invention belongs to the technical field of fuel cells, and in particular discloses a preparation method of an organic-inorganic composite proton exchange membrane for a fuel cell. The preparation method comprises the following steps of: oxidating a carbon nano tube first, then preparing the carbon nano tube coated by silicon dioxide by using a sol-gel method, and mixing dispersion liquid of the carbon nano tube coated by silicon dioxide with dispersion liquid of sulfonated polymers to prepare a solution casting membrane. The prepared composite proton exchange membrane has high water-absorbing performance and high alcohol resistant performance.

The present invention is directed to positively charged nanofiltration (NF) membranes comprising a substrate layer (S) based on a sulfonated polymer and a positively charged film layer (F) on top of said substrate, and to a method for their preparation. Furthermore, the present invention is directed to nanofiltration processes making use of said composite membrane.

The invention provides a conducting film which can be easily manufactured in high production efficiency and is formed by low-resistivity carbon nano tubes and a manufacturing method thereof. Carbon nano tubes are dispersed in solution with perfluoro sulfonated polymer as dispersant dissolved inside. A film with a structure that perfluoro sulfonated polymer is remained among the carbon nano tubes is formed by utilizing the solution with dispersed carbon nano tubes and vacuum filtration; and the conducting film formed by the carbon nano tubes is manufactured through dying the film. Water, ethanol or solvent containing water and ethanol can be used as the solvent.