5results 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.

The invention provides a super-hydrophobic polymer film and a preparation method and application thereof. The super-hydrophobic polymer film comprises a porous polymer matrix film layer and silicon particles with long-chain alkyl on the porous polymer matrix film layer. The preparation method comprises the following steps: (1) mixing a pore-forming agent, an oxygen-containing polymer and a first organic solvent to obtain a spinning solution, and spinning the spinning solution to obtain a porous precursor membrane; (2) mixing silicate ester, polyalkyl ethoxysilane, a second organic solvent and the porous precursor film, and performing ultrasonic treatment to obtain an ultrasonic treated material; and (3) mixing a precipitant and the ultrasonic-treated material, carrying out a precipitation reaction, and sequentially cleaning and freeze-drying an obtained second precursor film to obtain the super-hydrophobic polymer film. According to the invention, high membrane separation flux and high separation efficiency gt can be obtained; and the super-hydrophobic polymer film with acid and alkali resistance has a wide application prospect.

The invention relates to a polymer, a super-hydrophobic coating and a preparation method thereof. The main chain of the polymer contains a DHPMT derivative structure, and the side chain contains a long-chain alkyl group, so that a coating can be endowed with excellent bonding firmness with a substrate, solvent tolerance and durability. The preparation method of the polymer has the advantages of cheap and easily available raw materials, simple reaction conditions, fast reaction speed and high efficiency.

The present invention belongs to the technical field of preparation of environmental functional materials, and discloses a preparation method and application of a PAT / FS-50 heterogeneous composite membrane material. A PAT coating is modified on the surface of a porous membrane by a simple surface assembly method, and FS-50 is further introduced to reduce the surface energy of the membrane, thereby constructing a super-hydrophilic-underwater super-oleophobic PAT / FS-50 heterogeneous membrane material for oil-water separation experiments. The results show that the PAT / FS-50 heterogeneous membrane material exhibits excellent oil-water separation performance and self-cleaning performance, and is expected to be applied to the treatment of oily wastewater.