2results about How to "Increase Separation Throughput" patented technology

The present application relates to a kind of calcium alginate composite film with antibiofilm performance and its preparation method and application, the composite film is obtained by the surface of microfiltration membrane is coated with micro-nano coating, with superhydrophilic / underwater superoleophobicity, the micro-nano coating is the composite material of chitosan, silver nanoparticles and calcium alginate, micro-nano coating has fibrous three-dimensional porous structure, and silver nanoparticles are densely distributed on the surface and inside of coating.The calcium alginate composite film with antibiofilm performance provided by the present application provides micron pore structure by microfiltration membrane, and chitosan-coated silver nanoparticles provide nanostructure, so that the prepared composite film has superhydrophilic / underwater superoleophobicity, good antibacterial performance, good antibiofilm ability, can effectively separate oil-water mixture even oil-in-water emulsion stable to surfactant, and separation flux is high, can be applied to oil-water separation in complex water environment.

The application belongs to the field of membrane separation materials, and discloses a visible light catalytic self-cleaning oil-water separation membrane and a preparation method and application thereof, and comprises the following steps: 4-cyanopentanoic acid dithiobenzoate is used to prepare an alkyne functionalized RAFT reagent; the alkyne functionalized RAFT reagent is grafted on the polymerization chain of azidation polyether sulfone through a click chemistry reaction to obtain a RAFT reagent functionalized polyether sulfone polymer; based on the RAFT reagent functionalized polyether sulfone polymer, a PES / PES-CPPA membrane is prepared through a non-solvent induced phase separation method; a hydrophilic zwitterion PSBMA is modified on the surface of the PES / PES-CPPA membrane through a RAFT polymerization method to obtain a super-hydrophilic / underwater super-oleophobic membrane; Fe 3+ The super-hydrophilic / underwater super-oleophobic membrane is subjected to complex treatment to obtain the visible light catalytic self-cleaning oil-water separation membrane; and the application significantly improves the stability and effect of the membrane material in long-term use.