Modifying method for polyamide film composite film, polyamide film composite film and application thereof

A polyamide film and composite membrane technology, applied in the field of membrane separation, can solve the problems of low water flux, high membrane fouling tendency, and low reverse salt flux of polyamide thin film composite membranes, and achieve antibacterial and membrane fouling tendency. Low contamination tendency and low reverse salt flux effect

Inactive Publication Date: 2019-02-05
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above defects or improvement needs of the prior art, the invention provides a modification method of polyamide thin film composite membrane, a modified high-performance polyamide thin film composite membrane for water treatment and its application, the purpose of which is to pass The surface modification of the polyamide layer of the po

Method used

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  • Modifying method for polyamide film composite film, polyamide film composite film and application thereof
  • Modifying method for polyamide film composite film, polyamide film composite film and application thereof
  • Modifying method for polyamide film composite film, polyamide film composite film and application thereof

Examples

Experimental program
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Example Embodiment

[0059] Example 1

[0060] The polymer support layer of the composite membrane of Example 1 is a polysulfone microfiltration membrane. The preparation process of the composite membrane includes the following steps

[0061] (1) Prepare an aqueous phase solution, the aqueous phase solution contains m-phenylenediamine polyamine with a mass fraction of 3.4%. A solution of the organic phase of polybasic acid chloride is prepared, and the solution uses n-hexane as a solvent and a mass / volume fraction of 0.15% trimesoyl chloride as a solute. The polysulfone base membrane was completely immersed in the aqueous solution for 2 minutes and then taken out.

[0062] (2) After removing the excess water phase solution from the surface, pour the organic phase solution onto the upper surface of the wetted polysulfone membrane, and after 1 minute of contact time, pour out the excess organic phase solution. The amine monomer and the acid chloride monomer undergo an interfacial polymerization reactio...

Example Embodiment

[0064] Example 2

[0065] The polymer support layer of the composite membrane of Example 2 is a polysulfone microfiltration membrane. The preparation process of the composite membrane includes the following steps

[0066] (1) Prepare an aqueous phase solution, the aqueous phase solution contains m-phenylenediamine polyamine with a mass fraction of 3.4%. A solution of the organic phase of polybasic acid chloride is prepared, and the solution uses n-hexane as a solvent and a mass / volume fraction of 0.15% trimesoyl chloride as a solute. The polysulfone base membrane was completely immersed in the aqueous solution for 2 minutes and then taken out.

[0067] (2) After removing the excess water phase solution from the surface, pour the organic phase solution onto the upper surface of the wetted polysulfone membrane, and after 1 minute of contact time, pour out the excess organic phase solution. The amine monomer and the acid chloride monomer undergo an interfacial polymerization reactio...

Example Embodiment

[0070] Example 3

[0071] The polymer support layer of the composite membrane of Example 3 is a polysulfone microfiltration membrane. The preparation process of the composite membrane includes the following steps

[0072] (1) Prepare an aqueous phase solution, the aqueous phase solution contains m-phenylenediamine polyamine with a mass fraction of 3.4%. A solution of the organic phase of polybasic acid chloride is prepared, and the solution uses n-hexane as a solvent and a mass / volume fraction of 0.15% trimesoyl chloride as a solute. The polysulfone base membrane was completely immersed in the aqueous solution for 2 minutes and then taken out.

[0073] (2) After removing the excess water phase solution from the surface, pour the organic phase solution onto the upper surface of the wetted polysulfone membrane, and after 1 minute of contact time, pour out the excess organic phase solution. The amine monomer and the acid chloride monomer undergo an interfacial polymerization reactio...

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Abstract

The invention discloses a modifying method for a polyamide film composite film, a modified polyamide film composite film and application thereof. The composite film comprises a polymer supporting layer and an initial polyamide layer, wherein the initial polyamide layer is prepared from polyamine and polyacyl chloride through interface polymerization reaction; the initial polyamide layer is subjected to surface modification to obtain a modified polyamide layer; surface modification comprises performing surface grafted polyamine compound treatment, surface grafted organic acid treatment, surfacemineralization treatment and surface atomization treatment on the initial polyamide layer in sequence; and the polyamide film composite film obtained by the modifying method has good hydrophilcity and contains antibacterial metal atoms on the surface, so that when being applied to membrane separation, the polyamide film composite film has obviously improved water flux and antibacterial and anti-pollution performance.

Description

technical field [0001] The invention belongs to the field of membrane separation, and more specifically relates to a modification method of a polyamide thin film composite membrane, a polyamide thin film composite membrane and applications thereof. Background technique [0002] Thin film composite membrane (TFC membrane) is a kind of polymer membrane commonly used in membrane separation process. Polyamide thin film composite membrane is prepared by the reaction of water phase polyamine or alcohol (phenol) and oil phase polyacyl chloride or isocyanate through interfacial polymerization. As a result, an ultra-thin active layer with a thickness of hundreds of nanometers and a rough peak-valley morphology is formed on the surface of the porous support layer. [0003] The traditional polyamide film composite membrane is a highly cross-linked aromatic polyamide structure obtained by the reaction of m-phenylenediamine in the water phase and trimesoyl chloride in the oil phase. This...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/56B01D69/12B01D69/02C02F1/44
CPCB01D67/0093B01D69/02B01D69/125B01D71/56B01D2325/36B01D2325/48C02F1/44
Inventor 王艳申亮王芳倩
Owner HUAZHONG UNIV OF SCI & TECH
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