11 results about "Polystyrenesulfonic acid" patented technology

A method for manufacturing a work function-tunable ionic liquid-functionalized poly-3,4-ethylenedioxythiophene:poly-styrenesulfonate (PEDOT:PSS) film. The method comprises: a pretreatment step, a film formation step, a film treatment step, and an ionic liquid treatment step. In the pretreatment step, a pretreatment solution is prepared by mixing PEDOT:PSS solution with methanol. In the film formation step, the pretreatment solution is blade-coated onto a substrate and subsequently annealing to form a first-stage film. In the film treatment step, dimethyl sulfoxide(DMSO) is blade-coated onto the first-stage film, followed by annealing. The DMSO-treated first-stage film washed with methanol to remove residual DMSO, forming a second-stage film. In the ionic liquid treatment step, an ionic liquid is ultrasonically agitated in deionized water to prepare an ionic liquid solution. This solution is blade-coated onto the second-stage film. The film is annealed washed with deionized water to remove the ionic liquid, thereby obtaining the ionic liquid-functionalized PEDOT:PSS film.

This invention discloses a rare-earth element-containing cationic catalyst, its preparation method, and its application, belonging to the field of catalyst technology. Using 732 polystyrene sulfonic acid resin as a support, the target catalyst is prepared in four steps: pretreatment, zirconium coordination modification, aminobisphosphonic acid ligand grafting, and rare-earth ion chelation loading. This invention constructs a Brønsted-Lewis dual-acid synergistic catalytic system through directional structural design, achieving both ultra-stable rare-earth loading and retention of strong acidic sites, significantly improving the catalyst's water resistance, catalytic activity, and cycle stability. This catalyst can efficiently catalyze the synthesis of polyoxymethylene dimethyl ether from industrial formaldehyde aqueous solution and methyl acetal, exhibiting excellent formaldehyde conversion and target product selectivity. It is suitable for both batch and continuous production processes and has good prospects for industrial application.

The application discloses a flexible lithium manganate positive pole piece and a preparation method, and belongs to the technical field of lithium ion batteries. The carbon nanofiber membrane with polystyrene sulfonate grafted on the surface and the lithium manganate particles with polystyrene sulfonate adsorbed on the surface are assembled into a filter cake layer in close contact through vacuum filtration, then aniline solution slowly permeates through the filter cake layer and is adsorbed under the condition of no oxidant, so that the aniline monomers are uniformly adsorbed on the polystyrene sulfonate template to form a monomer reaction layer with uniform thickness, and in-situ limited polymerization is carried out, after polymerization and drying, the obtained composite membrane is subjected to gradient heating and hot pressing treatment, rearrangement of polyaniline molecular chains and further compaction at the interface between the carbon fiber and the lithium manganate are realized, and the flexible self-supporting positive pole piece with a positive active film layer free of metal current collectors, a three-dimensional conductive network and a relatively stable conductive state is obtained. The application is suitable for the fields of flexible lithium ion batteries, wearable electronic devices and solid-state lithium batteries.

The invention relates to a process for the preparation of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) particles comprising at least the following steps: a) providing a mixture comprising poly(3,4-ethylenedioxythiophene) and polystyrene sulfonate in at least an aqueous solvent; b) forming one or more PEDOT:PSS droplets by introducing the mixture from process step a) into an organic solvent A, wherein the aqueous PEDOT:PSS mixture forms the inside of the droplet and the organic solvent A forms the outside of the droplet; c) contacting the PEDOT:PSS droplets obtained from process step b) with a coagulation solution comprising a coagulation agent and at least one further solvent B, said coagulation solution having a density greater than the density of said organic solvent A and less than the density of the aqueous mixture of poly(3,4-ethylenedioxythiophene) and polystylene sulfonate; and d) coagulating the PEDOT:PSS droplets to PEDOT:PSS particles. Furthermore, the invention discloses spherical PEDOT:PSS particles which do not require further mechanical coagulation of the substance and the use of such particles, for example as cell culture microcarriers or as a suspended electrode.

The present invention relates to an improved wound dressing comprising a specific polymeric framework having a coating of a polymer network comprising a polyionic component, in particular a poly-(4-styrenesulfonic acid-co-maleic acid) (PSS-MA) or poly(acrylic acid-co-4- (acrylamidomethyl)benzenesulfonate) (PAA-ABS) component, covalently bonded to at least one of an uncharged polymer component and a non-polymeric crosslinker component thereby forming the polymer network, wherein the polyionic component, in particular the PSS-MA or PAA-ABS component, comprises sulfonate and / or sulfate groups, and a method to prepare it.

This invention discloses an integrated evaporation material and its preparation method for high-concentration brine treatment and power generation based on ion regulation, as well as a water treatment and energy harvesting system, belonging to the technical fields of solar interface evaporation. The material uses polyurethane sponge as a porous framework, constructs a photothermal and conductive network by impregnating conductive graphite with a sodium alginate suspension, and then crosslinks it twice with sodium alginate and calcium chloride, with polystyrene sulfonic acid impregnation introduced in between to form an ion-regulated gel layer containing sulfonate groups, constituting a three-layer composite structure. The material has a simple preparation process and low cost, and under one day of sunlight, the evaporation rate in a 20wt% sodium chloride solution is ≥3.6 kg·m³. ‑2 ·h ‑1 Furthermore, it is salt-free and can generate an open-circuit voltage of ≥800 mV and a short-circuit current of ≥600μA. It has a salt ion rejection rate of >99.9%, enabling efficient desalination and stable power generation of high-concentration brine, making it suitable for large-scale production applications.

This invention discloses a PVDF nanofiber membrane with an in-situ grown strong acid cation exchange layer, its preparation method, and its applications. The preparation method includes: electrospinning to prepare the PVDF nanofiber membrane; after surface activation, in-situ polymerization of a polymer containing sulfonic acid groups (such as polystyrene sulfonic acid) onto the fiber surface. This invention fixes the ion exchange layer to the fiber surface through chemical bonding, ensuring complete exposure of all sulfonic acid groups and eliminating the risk of detachment. The lipophilic segments in the grafted polymer chains significantly improve the wettability of the membrane to organic solvents (such as PGMEA and cyclohexanone), promoting rapid diffusion of metal ions to the exchange sites. When used in semiconductor photoresists or electronic-grade organic solvents, this membrane can deeply remove trace metal ions such as sodium, iron, copper, aluminum, and zinc to below 1 ppb, exhibiting advantages such as fast adsorption rate, high removal rate, and good cycle stability. It has broad application prospects in the field of ultrapure semiconductor wet electronic chemicals.

This invention provides a composition for preparing a hole buffer structure for flexible organic optoelectronic devices and its application. The composition comprises the following components by mass percentage: 0.1wt%~0.4wt% single-walled carbon nanotubes, 0.3wt%~0.5wt% polystyrene sulfonate, 0.1wt%~5wt% p-type dopant, 0.1wt%~0.3wt% anionic surfactant, 0.1wt%~0.3wt% stabilizer, and the balance being a solvent, including water. The single-walled carbon nanotubes have hydrophilic groups on their surface, and the polystyrene sulfonate is adsorbed onto the surface of the single-walled carbon nanotubes through π-π conjugation and electrostatic adsorption, forming polystyrene sulfonate-modified single-walled carbon nanotubes. The hole buffer structure formed based on this composition has a tunable work function, thereby achieving efficient hole injection and electron blocking, significantly reducing device driving voltage, improving luminous efficiency and lifespan, while maintaining excellent mechanical flexibility and low resistance characteristics.

This invention provides an environmentally friendly copper surface antioxidant, its preparation method, and its application. The copper surface antioxidant comprises the following components in parts by weight: 10-25 parts polystyrene sulfonic acid, 2-8 parts corrosion inhibitor, 1-10 parts small molecule organic acid, 0.1-3 parts inducing agent, and 60-80 parts deionized water. The copper surface antioxidant prepared by this invention exhibits good antioxidant properties and acid corrosion resistance, with a mild film-forming process, low copper surface roughness change rate, and good thermal stability, making it suitable for the antioxidant requirements of copper surfaces in semiconductor chips, integrated circuits, or printed circuit boards.

The present application relates to a kind of methods for recycling nylon from waste nylon and cotton blended textiles, comprising: waste nylon and cotton blended textiles are sheared and broken, impurity is removed, washing and drying, and sample fragments are obtained;Hydrogen ion of part of sulfonic acid group in polystyrene sulfonic acid is replaced by metal ion to obtain catalyst;Wherein, metal ion is the metal ion capable of coordinating with amide bond;Sample fragments are mixed with catalyst and then depolymerization is carried out, and the depolymerization product obtained is purified to obtain caprolactam.The present application can realize the directional catalytic depolymerization effect of nylon, while separating cotton component;Using the synergistic effect of polystyrene sulfonic acid and polystyrene sulfonic acid metal salt coexisting in the structure of catalyst, the newly exposed amide bond is continuously activated by proton, and the metal ion synchronously stabilizes the intermediate, so that the molecular chain is uniformly broken from the end to the inside, rather than locally broken, to avoid the generation of oligomer, directly generate caprolactam monomer, and improve the yield of caprolactam.

Provided is a multilayer body, and a polarizing plate, a heat-bent molded body, and a lens using the same. The multilayer body has a polycarbonate film having a thickness of 150 to 3000 μm, and a transparent conductive layer containing polyethylene dioxythiophene and polystyrene sulfonic acid.