23 results about "Sulfonated polymer" patented technology

The invention discloses a grafted sulfonated polymer membrane containing a spiro structure, a preparation method of the grafted sulfonated polymer membrane and application of the grafted sulfonated polymer membrane in an electrochemical energy storage device, and belongs to the technical field of polymer separation membranes. The membrane material comprises a polymer prepared by a polymerization reaction, and monomers for the polymerization reaction comprise an aromatic monomer with a spiro indane structure and a monomer containing an imidazole group; the polymer is characterized in that in a repetitive unit of the polymer, a side chain containing a sulfonic group is grafted on a nitrogen atom of an imidazole group. The preparation method comprises the following steps: carrying out polymerization reaction on the two monomers to obtain a precursor polymer; then, reacting the precursor polymer with a sulfonating agent to realize grafting of a sulfonic group side chain on an imidazole group nitrogen atom; and finally, preparing the membrane through a solution tape casting method. According to the preparation method, a sulfonic side chain is introduced into a spiro polymer skeleton with high chemical stability in a grafting manner, so that an efficient ion conduction channel is constructed, meanwhile, the structural stability of the membrane material is kept, and the prepared membrane material shows excellent comprehensive performance in application of alkaline aqueous organic flow batteries and the like.

The invention relates to a preparation method of a hollow fiber nanofiltration membrane based on integral forming, and belongs to the technical field of nanofiltration membrane preparation. According to the method, a first membrane casting solution and a second membrane casting solution are prepared, the first membrane casting solution comprises a polymer, a pore-foaming agent, a hydrophilic additive, a solvent and an interlayer binding force additive DTES, and the second membrane casting solution comprises a sulfonated polymer, a hydrophilic additive, a pore-foaming agent and a solvent; carrying out composite spinning on the two membrane casting solutions by adopting a three-hole spinning nozzle, so that a separation layer and a supporting layer of the nanofiltration membrane are synchronously formed; an annular heating module is arranged between a spinning nozzle and a coagulating bath interface, and the film surface solvent content is controlled through heat radiation. Hydrophilic nano channels are formed through hydrolysis and self-polycondensation of DTES on an interlayer interface, meanwhile, the interlayer binding force is enhanced, the layering problem in the easy-to-integrate nanofiltration membrane preparation process is solved, the method is suitable for the fields of direct drinking water purification, biological separation, salt lake lithium extraction and the like, and the method is suitable for large-scale production.

The invention relates to the technical field of ionic membranes, and mainly provides an ionic conduction membrane and a preparation method thereof, and a flow battery. The ion conducting membrane comprises the following components in parts by mass: 5-15 parts of cyclodextrin, 70-90 parts of sulfonated polymer and 4-15 parts of fluorine-containing polymer. The flow battery formed by the ion conduction membrane provided by the technical scheme of the invention has relatively high ion conductivity, so that high-power-density operation is realized and maintained.

This invention belongs to the field of membrane separation technology and lithium extraction technology. Specifically, it relates to a two-dimensional clay mineral lithium extraction membrane for enhanced lithium-magnesium separation. The membrane is obtained by cross-linking and modifying a two-dimensional clay mineral nanosheet suspension with a strongly positively charged functional organic compound to form a strongly positively modified two-dimensional clay nanosheet functional layer. A sulfonated polymer is then introduced for cross-linking. The strongly positively charged functional organic compound contains two or more positively charged groups, which are modified and connected to the nanosheet end faces and surfaces through hydrogen bonding, focusing on strengthening the positively charged environment at the nanosheet end faces. This invention can enhance the lithium-magnesium ion separation effect and the structural strength of the membrane, thereby improving the stability of the membrane in brine environments and showing great application potential.

The disclosure relates to laminate structures to cover or protect substrates or surfaces. The laminate structure comprises a support layer and a self-sterilizing / antimicrobial layer comprising a sulfonated polymer, capable of killing microbes within minutes and for an extended period of time. The sulfonated polymer has a sufficient degree of sulfonation to kill in less than 120 minutes at least 90% of microbes in contact with the surfaces, and for extended protection of the surfaces for at least one month. The laminate structure is particularly suitable for protecting high-touch surfaces such as door knobs, touch-screens, tables, as well as for use with facemasks, face shields, or as self-sterilizing wraps for surgical instruments and supplies. The laminates can also be used as garments or to cover / protect personnel having contagious diseases, etc., to decrease the transmission of microbes.

The invention relates to the field of fuel cells and technologies, in particular to an electrospun composite proton exchange membrane based on polysulfonated dopamine modification and a preparation method thereof. The composite proton exchange membrane comprises a porous electrospinning fiber substrate which is coated and modified by self-polymerization of a sulfonated dopamine monomer, wherein the sulfonated dopamine monomer is any one of aromatic ring sulfonated dopamine, terminal sulfonated dopamine and amino sulfonylated dopamine; the porous electrospinning fiber substrate is filled with the trivalent cerium salt and the sulfonated polymer. By introducing the poly-sulfonated dopamine coating, the wettability and binding force of the sulfonated polymer can be remarkably improved, and uniform dispersion and fixation of Ce < 3 + > are promoted, so that the proton conductivity and chemical stability of the membrane are improved. The preparation method of the composite proton exchange membrane is simple and convenient, the composite proton exchange membrane has good interface compatibility, free radical degradation resistance and long-term operation stability, and the composite proton exchange membrane has good application prospects in proton exchange membrane fuel cells and water electrolysis devices.

The invention provides a high-temperature-resistant non-sulfonated composite filtrate reducer for drilling fluid and a preparation method of the non-sulfonated composite filtrate reducer, and particularly relates to the field of C08F. The non-sulfonated composite filtrate reducer comprises a modified natural polymer and a synthetic non-sulfonated polymer, the modified natural polymer is etherified-crosslinked double modified konjac glucomannan; the synthetic non-sulfonated polymer is an acrylic acid-itaconic acid-acrylamide terpolymer. A traditional sulfonation treatment agent is abandoned, a full-non-sulfonation system is constructed by adopting environment-friendly components such as a modified natural polymer, a synthetic non-sulfonation polymer and a bio-based modified material, and the biodegradation rate of the system is larger than or equal to 90%, EC50gt; the drilling fluid has no biotoxicity, and completely meets the drilling environmental protection standard. The drilling fluid waste does not need to be treated complexly and can be discharged after reaching the standard only through simple solid-liquid separation, compared with traditional polysulfonate drilling fluid waste treatment, the cost is reduced by 40% or above, and the method is suitable for construction in severe environment-friendly areas.

The invention provides a composition comprising (a) water, (b) a sulfonated polymer, a sulfonated alkyl amine compound, or a combination thereof, (c) a chelating agent, and (d) an organic compound comprising a quaternary amine, wherein the composition has a pH of less than about 7. The invention also provides a method for removing residue from a surface of a microelectronic device substrate comprising contacting the surface of the microelectronic device substrate with the compositions described herein.

This invention discloses a polyaromatic hydrocarbon for preparing proton exchange membranes, its preparation method, and its application, belonging to the field of proton exchange membrane material preparation technology. This invention solves problems such as low molecular weight, uneven sulfonation, chain breakage in sulfonated polymers, poor dimensional stability, and poor mechanical properties in proton exchange membrane materials. Using aromatic monomers and 3,5-difluorotrifluoroacetophenone as raw materials, this invention employs a superacid-catalyzed Friedel-Crafts hydroxyalkylation reaction to prepare fluorinated aromatic polymers. Then, sulfonic acid groups are introduced onto the fluorinated aromatic polymers via nucleophilic substitution followed by sulfonation, preparing monosulfonated and disulfonated fluorinated sulfonic acid polymers. Proton exchange membranes are then prepared using these polymers as raw materials. The significant polarity difference between the hydrophobic fluorinated benzene ring side groups and the hydrophilic disulfonic acid groups in this invention is more conducive to forming a microphase separation structure and constructing continuous proton transport channels. Simultaneously, the hydrophobic fluorinated segments effectively suppress membrane swelling and improve its dimensional stability.

The preparation method comprises the following steps: S1, mixing a photocuring material, a photoinitiator, an organic solvent and a corrosion inhibitor to serve as an oil phase, taking an aqueous dispersion of an emulsifier as a water phase, and mixing and emulsifying the oil phase and the water phase to obtain an oil-in-water emulsion; s2, sodium p-styrenesulfonate is added into the oil-in-water emulsion, ultraviolet curing and washing are conducted, wet sulfonated polymer multi-core microcapsules are obtained, then ultrasonic treatment is conducted in deionized water, and sulfonated polymer multi-core microcapsule aqueous dispersion is prepared; and S3, dropwise adding aniline into the aqueous dispersion of the sulfonated polymer multi-core microcapsule, stirring, and dropwise adding an initiator aqueous solution containing protonic acid to initiate aniline polymerization, thereby obtaining the polyaniline multi-core microcapsule. When the multi-core microcapsule is used for an anticorrosive coating, even if local damage exists, the remaining core material can be protected by the wall material composite condensate, a time difference of'sequential release 'is formed, and the core material is slowly released.

The application provides a zinc-bromine flow battery negative electrode material and a preparation method and application thereof, and belongs to the field of zinc-bromine flow batteries. The preparation method comprises the following steps: firstly, a molybdenum source solution is added dropwise into a mixed aqueous solution containing a zinc source and a copper source; then, a fluorine source and a pH buffer are added, and the pH is adjusted to 6.5-7.5 to prepare a hydrothermal precursor solution; the carbon felt is immersed in the hydrothermal precursor solution for hydrothermal reaction, and then washed and dried to obtain an intermediate carbon felt; and finally, the intermediate carbon felt is immersed in a modification solution containing a sulfonated polymer and an organic zirconium crosslinking agent, and dried to obtain the zinc-bromine flow battery negative electrode material. According to the preparation method, the synthesis process is optimized, element doping and chemical coupling interfaces are introduced, the zinc-bromine flow battery negative electrode material prepared by the method can effectively inhibit the hydrogen evolution side reaction and enhance the electrode interface stability while inhibiting the growth of zinc dendrites; and the energy efficiency and the cycle stability of the zinc-bromine flow battery can be significantly improved.

This invention belongs to the field of membrane technology, and specifically discloses a zwitterionic functionalized COF and SiO2. 2 The polymer hybrid proton exchange membrane with spherical co-modification includes the following steps: (1) preparing a covalent organic framework SNW-1; (2) reacting SNW-1 with 1,3-propanesulfonic acid lactone to obtain zwitterionic functionalized covalent organic framework ZSNW-1; (3) preparing SiO2. 2 Nanospheres; (4) ZSNW-1 and SiO 2 Nanospheres were added to a sulfonated polymer solution at a mass ratio of 2:1 to ultimately prepare zwitterionic functionalized covalent organic frameworks COF and SiO2. 2 A polymer hybrid proton exchange membrane with spherical synergistic modification. This invention improves the structure and composition of key functional components in the proton exchange membrane by introducing zwitterionic-functionalized covalent organic frameworks ZSNW-1 and SiO2 into the proton exchange membrane. 2 Nanospheres, with their mass ratio controlled at 2:1, can effectively improve proton conductivity by utilizing their synergistic modification effect.

The invention belongs to the field of cation exchange membranes, and discloses a preparation method of a monovalent selective cation exchange membrane with Gemini electrolyte monomers grafted in ion channels. The preparation method comprises the following steps: firstly synthesizing a halomethylated sulfonated polymer as a base membrane raw material, then adopting an electrostatic auxiliary electrolyte monomer internal modification strategy, and utilizing directional migration of charged molecules under the action of electric field force and a reaction of amino of a Gemini electrolyte monomer and chloromethyl in a polymer membrane to prepare the Gemini polymer membrane. A Gemini electrolyte monomer with double amino groups, double quaternary ammonium and inner ring twisted conformations is grafted into an ion channel, and an M-GEM-X membrane system is constructed. The membrane realizes efficient selective separation of monovalent cations (K, Na and Li) and divalent cations (Mg) through a synergistic effect of size exclusion and electrostatic interaction, and is suitable for the fields of seawater salt extraction, salt lake lithium extraction and the like in an electrodialysis process.

The invention relates to the technical field of ion exchange membranes, and discloses a bipolar membrane and a preparation method and application thereof.The bipolar membrane comprises a positive membrane layer, a catalyst layer and a negative membrane layer which are sequentially stacked, the positive membrane layer comprises a first positive membrane layer and a second positive membrane layer, the first positive membrane layer is located on the surface of one side of the catalyst layer, and the second positive membrane layer is located on the surface of the other side of the catalyst layer; the second positive membrane layer is positioned on the surface of one side, deviating from the catalyst layer, of the first positive membrane layer; the material of the first positive membrane layer is formed by polymerizing monomers comprising double bonds and sulfonic acid groups; and the material of the second positive membrane layer comprises a sulfonated polymer. The positive membrane layer comprises the first positive membrane layer and the second positive membrane layer, the first positive membrane layer mainly plays a role in ion transmission to ensure that hydrogen ions generated by water dissociation can be quickly and efficiently migrated to the acid chamber, and the second positive membrane layer mainly plays a role in blocking common ions to prevent a large number of common ions in the acid chamber from being migrated to the alkali chamber, so that the acid chamber is protected from being polluted. And the positive film layer can effectively block the same ions.

The invention provides a composition comprising (a) water, (b) a sulfonated polymer, a sulfonated alkyl amine compound, or a combination thereof, (c) a chelating agent, and (d) an organic compound comprising a quaternary amine, wherein the composition has a pH of less than about 7. The invention also provides a method for removing residue from a surface of a microelectronic device substrate comprising contacting the surface of the microelectronic device substrate with the compositions described herein.

A sulfonated polymer fiber screen and a method for fabricating the same is disclosed. For example, a composition may include a plurality of sulfonated polymer fibers. The sulfonated polymer fibers may include polyether ether ketone (PEEK) fibers or polyaryl ether ketone (PAEK) fibers that are contacted with an acid bath that includes a sulfur containing group.

A water dispersible sulfopolymer for use as a material in the layer-wise additive manufacture of a 3D part made of a non water dispersible polymer wherein the water dispersible polymer is a reaction product of a metal sulfo monomer, the water dispersible sulfo-polymer being dispersible in water resulting in separation of the water dispersible polymer from the 3D part made of the non water dispersible polymer.

This invention provides a freeze-resistant and moisture-retaining conductive hydrogel sensor and its preparation method. The hydrogel sensor is prepared by room-temperature free radical polymerization of acrylic monomer, ferric salt, sulfonated polymer microspheres, lithium salt, glycerol, a redox initiation system, and deionized water. The polymer microspheres are polystyrene microspheres or styrene copolymer microspheres. The ferric salt is preferably ferric chloride hexahydrate, the lithium salt is preferably lithium chloride, and the redox initiation system is preferably an ammonium persulfate / sodium sulfite system. This invention significantly improves the conductivity, mechanical properties, and low-temperature freeze-resistant properties of the hydrogel by introducing sulfonated polymer microspheres, ferric salt, and lithium salt into the polyacrylic acid hydrogel system and combining them with a glycerol antifreeze system to construct a composite structure with ion conduction channels and a dynamic ion crosslinking network.

This invention discloses a silicon-carbon anode binder and its preparation method, as well as a silicon-carbon anode, belonging to the field of lithium-ion battery technology. The silicon-carbon anode binder and its preparation method include: adding a polyarylene ether resin to a polar aprotic solvent and sulfonating it to obtain a sulfonated polymer; selecting route A or route B according to the type of thermal crosslinking modifier to obtain the binder; when the thermal crosslinking modifier is an amine compound containing benzocyclobutene or a phenolic derivative substituted with maleimide, route A is selected; when the thermal crosslinking modifier is an epoxysilane coupling agent, route B is selected. This invention abandons traditional processes and uses sulfolane as the reaction medium. This solvent has good solubility and stability, can inhibit the degradation of the polymer backbone, and makes the reaction mild and controllable; at the same time, two differentiated grafting paths are designed for different crosslinking groups to ensure the activity of functional groups. During baking, a three-dimensional network structure is formed, buffering the volume expansion of silicon-carbon particles and maintaining the integrity of the electrode structure.

This invention concerns a method for manufacturing a non-porous membrane related to composite membrane technology based on organic polymers and silane-modified inorganic fillers. This method includes preparing a polymer matrix containing polyeugenol sulfonate and / or sulfonated polymers, modifying the inorganic filler using one or more silane compounds, mixing the materials in a solvent, gradually adding the filler in at least two stages while stirring until homogeneous, forming the mixture into a film layer, and drying at one or more temperature levels until a non-porous membrane is obtained (dense membrane). The inorganic filler may be titanium dioxide, silicon dioxide, graphene oxide, zinc oxide, alumina, zeolite, bentonite, nanoclay, or a combination thereof. This invention provides advantages in the form of more even distribution of the filler, reduced particle agglomeration, increased mechanical strength, thermal stability, and barrier properties against gas and / or water vapor.The resulting membrane can be used as a fuel cell electrolyte membrane, edible film, bioplastic, separator, packaging film, and other membrane technology applications.

This invention provides a zinc-bromine flow battery anode material, its preparation method, and its application, belonging to the field of zinc-bromine flow batteries. The preparation method involves first adding a molybdenum source solution dropwise to a mixed aqueous solution containing zinc and copper sources, then adding a fluorine source and a pH buffer to adjust the pH to 6.5-7.5 to obtain a hydrothermal precursor solution. A carbon felt is then immersed in the hydrothermal precursor solution for a hydrothermal reaction, followed by washing and drying to obtain an intermediate carbon felt. This intermediate carbon felt is then impregnated in a modification solution containing a sulfonated polymer and an organozirconium crosslinking agent, and dried to obtain the zinc-bromine flow battery anode material. The preparation method of this invention, through optimized synthesis processes and the introduction of elemental doping and chemical coupling interfaces, produces a zinc-bromine flow battery anode material that can effectively suppress hydrogen evolution side reactions and enhance electrode interface stability while inhibiting zinc dendrite growth; simultaneously, it can significantly improve the energy efficiency and cycle stability of zinc-bromine flow batteries.

The present application relates to a kind of separating halogen ion cation exchange membrane and its preparation method and application.The separating halogen ion cation exchange membrane includes sulfonated polymer-based composite material, and sulfonated polymer-based composite material includes sulfonated polymer and covalent organic framework material;The sulfonated polymer includes sulfonated polystyrene and sulfonated polysulfone.The sulfonated polymer-based composite material is high to the interception of halogen ion, and ion flux is high, and mechanical property is good, and can be used as halogen ion exchange membrane.

A composition is disclosed comprising a sulfonated styrenic block copolymer (SSBC) having an ion exchange capacity (IEC) of at least 0.5 meq / g; and at least one compound which reacts with the SSBC forming a cross-linked SSBC. The compound is selected from: (i) a cross-linking agent, (ii) a metal cation, and (iii) a non-sulfonated polymer. A film prepared from the composition containing the cross-linked SSBC has a toughness in wet state measured after 1 week of 1.2 to 8 MJ / m3; and a tensile stress in wet state measured after 1 week of 3.2 to 8 MPa, according to ASTM D412. The film can be used as a water purification membrane or an antimicrobial protection layer.