A polyphenol functionalized composite membrane with a "sandwich" sandwich structure separation layer and its preparation method

A sandwich structure, polyphenolic compound technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane, etc., can solve the problems of high operating pressure, achieve the effects of increased stability, improved antifouling performance, and excellent retention performance

Active Publication Date: 2021-07-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of high operating pressure during the operation of the existing filter membrane used for dye wastewater treatment, the present invention proposes a polyphenol functionalized composite membrane with a "sandwich" sandwich structure separation layer and its preparation method

Method used

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  • A polyphenol functionalized composite membrane with a "sandwich" sandwich structure separation layer and its preparation method
  • A polyphenol functionalized composite membrane with a "sandwich" sandwich structure separation layer and its preparation method
  • A polyphenol functionalized composite membrane with a "sandwich" sandwich structure separation layer and its preparation method

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specific Embodiment approach 1

[0034] DETAILED DESCRIPTION OF THE INVENTION: The present embodiment has a polyphenol functionalized composite film having a "sandwich" sandwich structure separation layer consists of a base film and a separation layer; the separation layer is deposited on the surface of the base film; the separation layer is from two polyphenols / The oxidant composite layer and a polyphenol / polyculture composite layer are constituted; the polyphenol / polyculture composite layer is disposed between the two polyphenol / oxidant composite layers, the substrate film as a ceramic-based porous film material or high Molecular-based porous film material, the pore diameter of the base film is 0.2 to 0.45 μm, the thickness is 100 to 150 μm, and the porosity is 60 to 80%.

[0035] The principles and beneficial effects of this embodiment are:

[0036] 1, the present embodiment has a "sandwich" sandwich structure separation layer of the velochemical function group in the separation layer of the separation...

specific Embodiment approach 2

[0041] DETAILED DESCRIPTION OF THE INVENTION Different: The present embodiment differs from the specific embodiment that the polyphenol / oxidant composite layer is complicated by a polyphenol compound and an oxidant; a polyphenol compound is a dopamine, a historine, a table, and a table. The table, the table did not eat the tea ulirate, the paraceins did not eat acid ester, did not eat acid, parasite, phyllol or tanninic acid; the oxidant was sodium uretic or ammonium sulfate.

specific Embodiment approach 3

[0042] BEST MODE FOR CARRYING OUT THE INVENTION The present embodiment is different from that of the particular embodiment: the polyphenol / polymented electrolyte composite layer is composed of polyphenol compounds and polymented electrolytes; polyphenol compounds are dopamine, historia, The table did not eat the tea, the table did not eat the tea catechin did not eat acid ester, the paraceins did not eat acid ester, no food acid, parasite, edeniphenol or tanning acid; polycore electrolyte is a polyino compound; polyino compound Polyethyleneimine or chitosan.

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Abstract

A polyphenol functionalized composite membrane with a "sandwich" sandwich structure separation layer and a preparation method thereof relate to a polyphenol functionalized composite membrane and a preparation method thereof. The purpose is to solve the problem of high operating pressure during the operation of the filter membrane for dye wastewater treatment. The composite membrane is composed of a base membrane and a separation layer; the separation layer is composed of two polyphenol / oxidant composite layers and one polyphenol / polycation electrolyte composite layer. Method: The basement membrane is wetted and activated, then placed in acetic acid buffer solution containing oxidant for one time modification, then placed in Tris buffer solution containing polyphenol compound and polycation electrolyte for secondary modification, and finally placed in tris buffer solution containing oxidant. The oxidizing agent was modified in an acetate buffer solution. The composite membrane system of the invention exhibits excellent interception performance for both positively charged and negatively charged dye molecules, and has low driving pressure, high antifouling property and stability, and prolonged life. The invention is suitable for the treatment of dye wastewater.

Description

Technical field [0001] The present invention relates to a polyphenol functionalized composite film and a preparation method thereof. Background technique [0002] Due to the rapid development of industrial and economic, scarce and water pollution have evolved into major environmental issues. As a textile printing and dyeing capital, my country has a large amount of wastewater, high concentration, and printing and dyeing wastewater are one of the industrial pollution sources of water environmental pollution constitute a serious threat. A large amount of organic pollutants are contained from the textile wastewater emitted from the printing and dyeing. The water will dissolve oxygen, and the high toxicity will adversely affect the ecosystem and human health. In this case, new materials and techniques for use in wastewater reuse are needed. [0003] Pressure-driven film filtration techniques, especially nanofiltration, as a sustainable technique, has advantages due to its removal of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/82B01D69/12B01D69/02B01D67/00C02F1/44C02F101/38
CPCB01D67/0006B01D69/02B01D69/12B01D71/82B01D2325/26B01D2325/36C02F1/44C02F2101/308C02F2101/38
Inventor 吕东伟马军徐舒齐晶瑶王盼盼
Owner HARBIN INST OF TECH
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