Antibacterial composite nanofiltration membrane with high salt rejection rate and preparation method of antibacterial composite nanofiltration membrane

A composite nanofiltration membrane, high-cut technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as troublesome use, inability to remove bacteria and viruses, and achieve simple experimental process and enhanced antibacterial performance , The effect of increasing the salt interception rate
CN104548951AInactive Publication Date: 2015-04-29CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2015-04-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an antibacterial composite nanofiltration membrane with high salt rejection rate and a preparation method of the antibacterial composite nanofiltration membrane. The composite nanofiltration membrane contains attapulgite modified by a chitosan quaternary ammonium salt. The preparation method comprises the following steps: (1) enabling a porous support layer to be in contact with a water phase solution of a compound containing two or more reactive amino groups; (2) removing the excess water phase solution on the porous support layer after water phase infiltration; (3) enabling the porous support layer after the treatment in step (2) to be in contact with an organic phase solution of an acyl chloride compound containing two or more acyl chloride groups; (4) volatilizing the organic phase solution and further enabling the porous support layer to be in contact with the water phase solution of the compound containing two or more reactive amino groups and the attapulgite modified by the chitosan quaternary ammonium salt; (5) performing heat treatment and washing with water to obtain the antibacterial composite nanofiltration membrane. The antibacterial composite nanofiltration membrane disclosed by the invention can improve antibacterial performance and salt rejection rate on the basis of keeping considerable water flux.
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Description

technical field

[0001] The invention relates to the field of membrane technology, and more specifically relates to a high salt cut-off antibacterial composite nanofiltration membrane and a preparation method thereof. Background technique

[0002] As a new type of separation technology, membrane separation has the advantages of low energy consumption, high separation efficiency, and environmental protection compared with traditional separation technologies such as distillation and rectification. Nanofiltration membrane separation technology is a new pressure-driven membrane separation technology between reverse osmosis and ultrafiltration. Its rejection rate for divalent or multivalent ions and organic molecules with a molecular weight greater than 200 is generally greater than 90%, which can achieve selective separation of different substances. Therefore, relying on its unique separation characteristics, nanofiltration membranes have been widely used in water softening, sol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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