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Polyethyleneimine/GO multilayer film with high swelling resistance and preparation method of polyethyleneimine/GO multilayer film

A polyethylenimine, anti-solubility technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. Efficiency improvement and other issues, to achieve the effect of increasing hydrophilicity, increasing anti-solubility, and strong antibacterial effect

Pending Publication Date: 2022-04-29
邢超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above modification methods are to graft linear polymer modifiers such as diionic polymers and polyethylene glycol polymers on the surface of PVDF membrane materials, affected by the linear molecular chain structure (steric hindrance effect), hydrophilic The number of group modifications is small, resulting in low coverage of the modifier film and limited improvement in anti-pollution efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The dibasamine solution is a mixture of dibasic amines and sodium carbonate buffer solution, the ethanol solution is added with epichlorohydrin, the epoxy compound is epichlorohydrin, waterborne bisphenol A epoxy resin and glycidol glycidol glycidin epoxy resin in any one, the guanidine substance is cyanamide or guanidine salt, by chemical bonding of the grafting of the guanidine substance and polymer polyethyleneimide combined together, so that the product has a long-lasting antibacterial performance.

Embodiment 2

[0028] The catalyst is an oxygen-enriched composite photocatalyst (WO3-x / NC), the oxygen-enriched composite photocatalyst (WO3-x / NC) by tungsten oxide (WO3-x, 1>x>0) and 3D nitrogen-air-doped carbon matrix composition, improve the stability of material mixing, increase the solubility of the product.

Embodiment 3

[0030] Preparation method of polyethyleneimide multilayer film with strong solubility, comprising the following steps:

[0031] Step 1, add dibasamines to the sodium carbonate buffer solution;

[0032] Step 2 The PVDF separation membrane is soaked in the solution obtained in step 1, and the reaction is 8~12h under conditions of 180~320rpm, 23~35 °C, and the amino-sene addition reaction is used to form an ammonia salt compound layer on its surface, and the activated PVDF separation membrane is obtained, which is washed and set aside;

[0033]Step 3, step 2 of the PVDF separation membrane obtained soaked in ethanol solution, under the protection of nitrogen, added catalyst, at 120 ~ 220rpm, 60 ~ 68 °C reaction 4.5 ~ 7h, and then add sodium hydroxide solution drop by drop, and continue to react at 120 ~ 220 rpm, 45 ~ 60 °C for 2 ~ 6h, through phase transfer catalysis method, form an epoxy compound layer on the surface of the PVDF separation membrane, wash it with ethanol and deioniz...

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Abstract

The invention relates to the technical field of polyethyleneimine membranes, in particular to a high-swelling-resistance polyethyleneimine / GO multilayer membrane and a preparation method thereof.The high-swelling-resistance polyethyleneimine / GO multilayer membrane comprises a diamine solution, a PVDF separation membrane, a catalyst, an ethanol solution, a sodium hydroxide solution, a macromolecular polyethyleneimine solution, a methanol solution, an epoxy compound and guanidine substances; the guanidine salt and the polyethyleneimine are combined together in a chemical bonding grafting mode, so that the product has lasting antibacterial performance, the polyethyleneimine polymer with the antibacterial function is synthesized by stirring and heating, the method has the remarkable advantages of high synthesis efficiency and strong antibacterial effect of the product, and the catalyst has a wide application prospect through an oxygen-enriched composite photocatalyst (WO3-x / NC). The preparation method comprises the following steps: preparing a PVDF separation membrane, improving the mixing stability of the material, increasing the anti-dissolution property of the product, increasing the hydrophilicity by forming an ammonia salt compound layer on the surface of the PVDF separation membrane in the step 2, and further improving the hydrophilicity of the polyethyleneimine composite membrane by increasing the anti-dissolution property.

Description

Technical field [0001] The present invention relates to the field of polyethyleneimine membrane technology, specifically a polyethyleneimide / GO multilayer film with strong swelling resistance and preparation method thereof. Background [0002] Membrane separation technology with its precise separation, efficient purification, green environmental protection and other advantages, is widely used in the field of membrane sewage sewage treatment, polyvinylidene fluoride (PVDF) is a membrane material with excellent performance, it has high strength, high temperature resistance, chemical corrosion resistance and other characteristics, but in the application of PVDF membrane separation technology, PVDF membrane surface energy is low, there is a strong hydrophobicity leading to its low flux, easy to pollute, seriously limiting its application in the field of membrane sewage treatment, therefore, Hydrophilic modification of PVDF separation membrane to improve the anti-pollution performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00
CPCB01D69/12B01D69/125B01D67/0002B01D67/0006B01D2323/02B01D2325/48B01D2325/36
Inventor 邢超
Owner 邢超
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