Super-hydrophilic oil water separation net film with antifouling and antibacterial functions and preparation as well as application thereof

Abstract

The invention discloses a super-hydrophilic oil water separation net film with antifouling and antibacterial functions and preparation as well as application thereof. The net film is provided with a special three-layer structure, and is formed by a water-sensitive agent bottom layer, a crosslinking agent interlayer and a super-hydrophilic ternary polymer surface layer; a super-hydrophilic ternary polymer at the outermost layer is obtained by polymerizing three monomers of HEA, SPP and DMHB through a water solution, and adopted raw materials and a reaction system (water) are environment-friendly, cannot cause secondary pollution, and also cannot infect the health of an operator. In the super-hydrophilic ternary polymer, long carbon chain quaternary ammonium salt groups of the DMHB exist and can effectively kill bacteria, and meanwhile SPP glycine betaine groups simultaneously having positive and negative charges also exist and can effectively prevent molecular adsorption of protein and the like. The net film is stable in film layer structure, can better keep super hydrophilicity and antifouling and antibacterial properties, and can be applied to treatment of oily wastewater.

Description

Technical field [0001] The invention belongs to the technical field of membranes, and relates to a super-hydrophilic oil-water separation omentum with anti-fouling and antibacterial functions and a preparation method and application thereof. More specifically, it relates to a super-hydrophilic terpolymer structure Separation net membrane, preparation method thereof and application in separation of oily wastewater. Background technique [0002] With the intensification of environmental pollution and the depletion of water resources, how to recycle as much of the existing water resources as possible has become the focus of attention, and the viewpoint of wastewater as a resource is gradually accepted by the public. To this end, the State Council promulgated the "Water Pollution Prevention and Control Action Plan" on April 2nd, 2015, which is the "Water Ten Measures", and water treatment is gradually put on the agenda. [0003] At present, membrane treatment technology has gradually ...

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Problems solved by technology

Preparation of oil-water separation membranes with both anti-protein adsorption (anti-fouling) and bactericidal properties, so that the surface layer of the membrane has a certain degree of hydrophilicity or oleophobicity, has become a research direction to solve the problem of preventing biomacromolecules from fouling the membrane. Currently, this type of research still not much

[0004] The patent CN102728241B proposes to prepare methyl methacrylate, methacryloyloxyethyltrimethylammonium chloride and acrylamidomethylpropanesulfonic acid copolymer (PMMA-PDMC-PAMPS) and add it to the PVDF solution through phase The conversion method can produce a separation membrane with anti-microbial pollution. However, organic solvents such as DMF are required in the polymer synthesis and phase inversion preparation process, and waste liquid containing organic solvents will be generated, which will cause certain damage to the environment. pressure

[0005] In patent CN201410627449, the hydroxyl groups on the surface of silica or titanium dioxide are modified into mercapto groups and nano-Ag ions are deposited, and then added to the casting solution to obtain spinning hollow fiber membranes by phase inversion method. DMF and DMSO are also used in the casting solution , DMAc and other organic solvents, spinning waste liquid may also pollute the environment

At the same time, the hydrophilic properties of the nano-silver particles loaded on the surface of the film will gradually weaken or even disappear in the natural environment, resulting in a decline in antifouling performance.

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