Composite polyamide film with salt concentration responsiveness, preparation method and use of composite polyamide film

A composite polyamide membrane and polyamide membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve high separation efficiency and high efficiency separation effect
CN110339724AActive Publication Date: 2019-10-18SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2019-10-18

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Abstract

The invention provides a composite polyamide film with salt concentration responsiveness, a preparation method and use of the composite polyamide film, and belongs to the technical filed of compositefilm preparation. The preparation method of the composite film comprises the following steps that (1), a support layer is fixed in a glass plate and a Teflon frame, aqueous phase monomer solution is poured into the Teflon frame, the support layer is soaked for 1-10 minutes; (2), the aqueous phase monomer solution is outwelled, surface moisture of the support layer is removed, then oil phase monomer solution is poured into the surface of the support layer, interface polymerization reaction is conducted for 30-600s; and (3), the oil phase monomer solution is outwelled, the prepared composite polyamide film is placed in distilled water at 4 DEG C to be saved. According to the composite polyamide film, the peculiar salt concentration response characteristics is provided, water flux of the composite polyamide film can increase with increase of salt concentration in raw material solution. Small organic molecules such as salt and dye in the raw material solution can be effectively separated,and very high separation efficiency is provided.
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Description

Technical field

[0001] The invention belongs to the technical field of membrane material preparation, and specifically relates to a composite polyamide membrane with salt concentration responsiveness and a preparation method and use thereof. This type of composite polyamide membrane has peculiar salt concentration response characteristics, and its water flux is With the change of the salt concentration in the raw material liquid, there is a significant change. Background technique

[0002] The technology of interfacial polymerization to prepare polyamide selective membranes started in 1972 and was invented by Caddote, and the polyamide membrane prepared by this method was named polyamide thin-film composite membrane. It consists of a non-woven fabric backing layer, a polymer porous support layer (such as a polysulfone porous support layer prepared by a phase separation method) and a polyamide selective layer. The implementation method of the interfacial polymerization method is ...

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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