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A kind of plant polyphenol modified polymer film and its preparation method and application

A technology for polymer membranes and plant polyphenols, applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems of easy fouling of polymer membranes, uncontrollable hydrophilization modification, etc., so as to maintain the permeate flux. , good advancement and practicability, the effect of hydrophilic improvement

Active Publication Date: 2021-03-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of polymer membranes being easily polluted and uncontrollable hydrophilic modification, the purpose of the present invention is to design a hydrophilic substance with a special structure, functionalize the membrane surface, and construct a hydrophilic anti-pollution surface. Based on the characteristics of non-specific deposition of plant polyphenols, the controllable hydrophilic modification of the polymer film can be realized by changing the concentration of the prepared plant polyphenol mixed solution, dipping time, pH, temperature and other conditions

Method used

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  • A kind of plant polyphenol modified polymer film and its preparation method and application
  • A kind of plant polyphenol modified polymer film and its preparation method and application
  • A kind of plant polyphenol modified polymer film and its preparation method and application

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Embodiment 1

[0047] The preparation of embodiment 1 Phyto Dove modified polymer film

[0048] 1) Polymer film pretreatment: immerse the polymer film in a beaker containing absolute ethanol for 0.5 h, then soak in deionized water for 0.5 h, and repeat this process 3 times. After treatment, the membrane was placed in deionized water for later use. Wherein, the polymer film is a polyvinylidene fluoride film.

[0049] 2) Prepare a plant polyphenol mixed solution: prepare a Tris buffer solution with a concentration of 1 g / L and a pH of 8.5. Add 1 g of plant polyphenols and 35.06 g of sodium chloride into 1 L of Tris buffer solution, stir for 5 minutes to fully dissolve, and obtain a uniform mixed solution of plant polyphenols; wherein, the plant polyphenols are tannic acid.

[0050] 3) Preparation of plant polyphenol-modified polymer film: immerse the pretreated polymer film in a beaker containing plant polyphenol mixed solution, place it in a constant temperature water bath oscillator at 25°...

Embodiment 2

[0052] The preparation of embodiment 2 Phytopolyphyll modified polymer film

[0053] (1) Polymer membrane pretreatment: immerse the polymer membrane in a beaker containing absolute ethanol for 0.6h, then soak it in deionized water for 0.6h, and repeat this 3 times; The film was placed in deionized water for use. Wherein, the polymer film is a polytetrafluoroethylene film.

[0054] (2) Configure plant polyphenol mixed solution: add plant polyphenol and metal salt to tris (Tris) buffer solution, stir for 3 minutes, get plant polyphenol mixed solution, make the plants of plant polyphenol mixed solution more The final concentration of phenol is 2.5g / L, and the final concentration of metal salt is 20g / L; wherein the Tris buffer solution solution concentration is 2g / L, and the HCl or NaOH aqueous solution with a concentration of 0.1mol / L is used to adjust the pH to 8.0; wherein the plant polyphenol It is a mixture of caffeic acid and cinnamic acid; the metal salt is a mixture of m...

Embodiment 3

[0057] The preparation of embodiment 3 Phyto Dove modified polymer film

[0058] (1) Polymer membrane pretreatment: immerse the polymer membrane in a beaker containing absolute ethanol for 0.5h, then soak it in deionized water for 0.5h, and repeat this twice; The film was placed in deionized water for use. Wherein, the polymer membrane is a polysulfone membrane.

[0059] (2) Configure plant polyphenol mixed solution: add plant polyphenol and metal salt to Tris (Tris) buffer solution, stir for 1min, get plant polyphenol mixed solution, make the plants of plant polyphenol mixed solution more The final concentration of phenol is 0.5g / L, and the final concentration of metal salt is 5g / L; the concentration of Tris buffer solution is 0.5g / L, and the pH is adjusted to 7.0 with HCl or NaOH aqueous solution with a concentration of 0.1mol / L; Phenol is a mixture of rosein, anthocyanin and catechin; the metal salt is a mixture of ferric chloride and aluminum chloride.

[0060] (3) Prep...

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Abstract

The present invention discloses a plant polyphenol modified polymer membrane as well as a preparation method and application thereof, in particular relates to the field of modified polymer membranes with anti-fouling properties. In the prior art, due to low surface energy of the polymer membrane, the polymer membrane is susceptible to contamination with proteins, oils and the like and causes a series of temporary or permanent pollution problems. The polymer membrane provided by the invention utilizes the super-strong adhesive ability of plant polyphenols and the coordination of polyphenols andmetal ions to build a hydrophilic coating on the surface of a hydrophobic polymer membrane. The polymer membrane provided by the invention has the advantages of simplicity, high efficiency, mild reaction condition and strong practicability. The controllable hydrophilic modification of a hydrophobic polymer can be realized by changing the conditions of the dip-coating time, the concentration of aplant polyphenol mixed solution, the pH, the temperature and the like, and a high permeation flux can be maintained in the course of cross-flow continuous work, so that the polymer membrane has a verygood application prospect in the field of water treatment. The invention also opens up an effective way, which is simple and easy to operate and has strong universality, for modification of polymer membranes under mild conditions.

Description

technical field [0001] The invention relates to the field of modified polymer films with antifouling properties, in particular to a plant polyphenol modified polymer film and its preparation method and application. Background technique [0002] The shortage of water resources and energy consumption are regarded as two major problems that restrict global prosperity and affect human health. Improving environmental awareness and balancing the relationship between nature and humans have received more and more attention worldwide. The development of water treatment Technology becomes the key to solving this problem. At present, different water treatment technologies have been widely studied, among which polymer membrane separation technology is one of them, because of its high separation efficiency, simple operation, energy saving, and environmental friendliness, it occupies a dominant position. Polymer membranes often have excellent properties such as high mechanical strength, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00C02F1/44
CPCB01D67/0006B01D69/02B01D71/34B01D2323/46B01D2325/36C02F1/44
Inventor 陈莉徐李昊陈琦何洋赵义平
Owner TIANJIN POLYTECHNIC UNIV
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