5 results about "Polysulfone membrane" patented technology

The application relates to the technical field of composite materials, and discloses a mixed-fiber fabric reinforced thermoplastic composite material laminated plate and a preparation method and application thereof. The laminated plate is obtained by die molding a preformed body, wherein the preformed body comprises a plurality of mixed-fiber fabrics and thermoplastic resin films which are sequentially stacked in layers, and the thermoplastic resin film is selected from one or more of a polyamide film, a polyphenylene sulfide film, a polyether ether ketone film, a poly (aryl ether ketone) film, a polycarbonate film and a polysulfone film. The prepared thermoplastic laminated plate is uniform in resin distribution and excellent in comprehensive mechanical properties.

The application discloses a dopamine in-situ growth ZIF-8 dye / salt separation loose nanofiltration membrane and a preparation method thereof, and comprises the following steps: preparing a Tris buffer solution by taking a Tris buffer solution as a solvent and an alcohol-water mixed solution; preparing a precursor solution by adding dopamine, polyethyleneimine and a metal ion compound into the buffer solution; depositing the precursor solution on a polysulfone membrane surface; dissolving 2-methylimidazole in the alcohol-water mixed solution and then depositing the 2-methylimidazole on the polysulfone membrane surface; pouring off the excess solution, drying the membrane and then storing the membrane in deionized water to obtain a filter membrane. The nanofiltration membrane prepared by the application can intercept dyes and almost completely pass bivalent inorganic salts, and can fully separate a mixed solution of Congo red, methyl blue and sodium sulfate. Meanwhile, the application is simple in operation, can be popularized to various material substrates, and has great application value and development prospect.

A filtration membrane includes a polysulfone (PFS) membrane support, and a crosslinked polyamide layer disposed on the PFS membrane support. The crosslinked polyamide layer includes a network formed by polycondensation between diethylenetriamine and trimesoyl chloride, and graphene oxide (GO) nanosheets covalently bonded to the network via a linking spacer. The linking spacer includes a backbone chain having at least 8 backbone atoms. The backbone chain has a plurality of amine groups including —NH— and —NH2, and the linking spacer is bonded to the graphene oxide nanosheets via a —Si—O— bond and bonded to the network via reactions between trimesoyl chloride and the plurality of amine groups. A filtration method includes filtering a mixture including water and an organic molecule through the filtration membrane to generate a water permeate.

This invention relates to a highly selective acid-resistant nanofiltration membrane, its preparation method, and its application, belonging to the field of membrane separation technology. The preparation method of the highly selective acid-resistant nanofiltration membrane includes the following steps: (1) immersing a polysulfone membrane in an aqueous solution containing a strong oxidant and metal chloride; (2) immersing the membrane treated in step (1) in a hexane solution containing pyrrole molecules and allowing it to stand; (3) spraying a mixed ethanol solution of phenol and formaldehyde onto the membrane treated in step (2); (4) placing the membrane treated in step (3) in a hot sodium hydroxide solution containing a surfactant for post-treatment to obtain the highly selective acid-resistant nanofiltration membrane. This invention features a simple process, readily available raw materials, and is suitable for industrial production; simultaneously, the highly selective acid-resistant nanofiltration membrane, while possessing strong acid resistance, exhibits high selectivity for both divalent and monovalent ions, making it suitable for the desalination treatment of acidic industrial wastewater.