• 专利标题:   Preparation of polymer ultrafiltration membrane for sewage treatment, involves mixing e.g. polyvinylidene fluoride to obtain membrane casting solution, cooling, placing on glass plate, scraping out uniform flat membrane, soaking in deionized water and modification solution, washing, and drying.
  • 专利号:   CN115155328-A
  • 发明人:   MA G, WANG M, YU H, HUANG A, LI X, GAO B
  • 专利权人:   ANQING XINXIANGRUI ENVIRONMENTAL TECHNOL
  • 国际专利分类:   B01D067/00, B01D069/02, B01D071/02, C02F001/44
  • 专利详细信息:   CN115155328-A 11 Oct 2022 B01D-069/02 202201 Chinese
  • 申请详细信息:   CN115155328-A CN10806652 08 Jul 2022
  • 优先权号:   CN10806652

▎ 摘  要

NOVELTY - Preparation of polymer ultrafiltration membrane involves mixing polyvinylidene fluoride, graphene dispersion liquid, pore-forming agent and N-methyl pyrrolidone, stirring for 5-7 hours at 60°C, leaving still for 6 hours, removing bubbles to obtain a membrane casting solution, cooling the casting solution to 20-25°C, placing on a glass plate, scraping out a uniform flat membrane, soaking the flat membrane in deionized water, changing water every 12 hours at room temperature, leaving still for 24 hours to obtain a base membrane, soaking the obtained base membrane in the modification solution at 60°C for 24 hours, taking out, washing with deionized water, and drying. USE - Preparation of polymer ultrafiltration membrane (claimed) for sewage treatment of separating, concentrating, purifying of biological products, pharmaceutical products, and used in food industries, end-treatment devices for blood treatment, wastewater treatment and ultrapure water production. ADVANTAGE - The modified graphene oxide is introduced into the ultrafiltration membrane after being treated, so the compatibility of the modified graphene oxide in the ultrafiltration membrane is improved, and the hydrophilicity of the ultrafiltration membrane is improved. The method provides polymer ultrafiltration membrane with anti-organic pollution performance and reduced agglomeration phenomenon.