Wear-resistant super-hydrophilic/underwater super-oleophobic leather collagen fiber membrane as well as preparation and application thereof

• Main Authors: YE XIAOXIA, CHI RUIYANG, LIU YIFAN, LYU YUANCAI, LIN CHUNXIANG, JUNG JI-HONG
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention belongs to the technical field of leather collagen fiber membranes, and particularly relates to a wear-resistant super-hydrophilic/underwater super-oleophobic leather collagen fiber membrane material with charge demulsification performance and a preparation method and application thereof. Macromolecules with strong positive charges are grafted to leather collagen fiber membrane molecules with side chains containing rich functional groups such as carboxyl-COOH, amino-NH2, amide-CO-NH-and hydroxyl-OH through a Schiff base reaction, then after amination treatment is conducted on the leather collagen fiber membrane, butyl titanate is added, and the super-hydrophilic performance of the membrane is enhanced in a mode of in-situ growth of TiO2. The membrane separation flux is improved. The prepared wear-resistant super-hydrophilic/underwater super-oleophobic leather collagen fiber membrane with the charge demulsification performance is used for efficient separation of anionic O/W emulsion, has the adva