English
简体中文
Русский
إنجليزي
Preparation of hydrophilic modified ZIF-8 and its application in the preparation of nanocomposite matrix reverse osmosis membrane with improved permea
2024-08-28 08:43
Researchers found that the hydrophilic modification of ZIF-8 using tannic acid significantly improves water flux and salt rejection in nanocomposite reverse osmosis membranes.
Metal–organic frameworks (MOFs) are widely employed in designing nanocomposite membranes owing to their excellent performance and diversity. However, their inherent hydrophobicity limits their application in nanocomposite membranes. In order to improve the hydrophilicity of zeolitic imidazolate framework-8 (ZIF-8), tannic acid (TA) was utilized to etch-modify it, resulting in a TA-ZIF-8 nanostructure with a hydrophilic shell. TA-ZIF-8 was subsequently introduced into the aqueous phase and used to prepare a nanocomposite matrix reverse osmosis membrane through interfacial polymerization (IP).
The prepared nanocomposite reverse osmosis membrane had a surface with good hydrophilicity and a pure water flux increased to 55.28 L m-2 h-1 (approximately 1.74 times). Additionally, the introduction of TA-ZIF-8 significantly enhanced the electronegativity of the membrane surface, and the nanoparticles were compatible with the polyamide layer, leading to a salt rejection rate of up to 99.5% for a NaCl solution with a concentration of 32000 ppm. These results indicate great potential for applying hydrophilically modified ZIF-8 to reverse osmosis membranes.
source：european-coatings
Journal of Coatings Technology and Research, Volume 21, pages 683–692, (2024)
MORE HZinfo
- Brief Report on the Economic Operation of China's Coatings Industry in 2025
- In 2025, despite the Chinese coatings industry making solid strides on the path of high-quality development, the output of coatings saw a slight decline due to the dual pressures of weak downstream de
-
2026-06-04
- Market Report of the Raw Materials for Coatings and Waterproofing in 2025
- In 2025, China's coatings procurement costs will exhibit a moderate downward trend with structural differentiation, while the paint and raw material market will display a distinct "cost-price" diverge
-
2026-06-04
- Jinbaoli Deeply Cultivates the SpecialCoating & Resin Track
- Whether it is employees, suppliers or customers, only when the three parties are united and sincerely solve problems for each other can a positive cycle be formed to survive the industry cycle.
-
2026-06-04