T/CIPR 068-2022 Active Group standards

T/CIPR 068-2022 High-flux enhanced ultrafiltration membrane

Publish Date: 2022-06-13 Implement Date: 2022-07-13 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CIPR 068-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Films and sheets

Publish Date: 2022-06-13

Implement Date: 2022-07-13

Scope

Main technical content: This technology uses hydrophilic agents, auxiliary agents, and dopamine-modified polyvinyl chloride to blend and modify under polar solvents, reducing the surface tension of the membrane surface and the inner wall of the membrane pores, improving the hydrophilicity of polyvinyl chloride. At the same time, dopamine in dopamine-modified polyvinyl chloride contains catechol groups and amino groups, which are prone to self-polymerization under the oxidation of dissolved oxygen to form a firmly adhered dopamine composite layer on the surface of polyvinyl chloride. The interaction force between the dopamine composite layer and the polyvinyl chloride surface is between covalent bonds and non-covalent bonds, with strong stability and durability. Then, the hydrophilic agent includes triethanolamine. Triethanolamine not only contains rich hydrophilic groups, but also has a very strong electronegativity of nitrogen atoms, with a strong lone pair of electrons. It can form hydrogen bonds with the polar bonds in the auxiliary agent and the dopamine composite layer, attracting each other. This can overcome the problem of decreased hydrophilicity of hydrophilic additives in ultrafiltration membranes after use, thus maintaining long-term hydrophilicity, improving the anti-pollution of ultrafiltration membranes, and maintaining a high operating flux for a long time. At a pressure of 0.1MPa and a temperature of 25℃, the pure water flux is 400-600L/M2·H, and the filtration accuracy reaches 0.01 micron. In addition, triethanolamine can coordinate with ions such as calcium, magnesium, and iron, and has a good removal effect on metal ions in wastewater. Moreover, the small-molecule pore-forming agent is not easy to clog the pores, has good film-forming performance, good pure water flux, low entanglement with the main material, and easy to detach from the surface of the membrane. The auxiliary agent effectively improves the melt processability, greatly enhances the