Preparation method of demulsifier functionalized oil-water separation membrane

A technology of oil-water separation membrane and functionalization, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of non-recyclable, high consumption, high pollution, etc., and achieve good reusability and excellent separation performance Effect

Inactive Publication Date: 2020-02-25
淮安晶彩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current chemical demulsification method still has problems such as high consumption, high pollution, and inability to recycle.

Method used

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  • Preparation method of demulsifier functionalized oil-water separation membrane
  • Preparation method of demulsifier functionalized oil-water separation membrane
  • Preparation method of demulsifier functionalized oil-water separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An oil-water separation membrane with membrane demulsification function, its preparation method is as follows:

[0024] (1) Put styrene / maleic anhydride (SMA) and (polyethyleneimine polyoxypropylene polyoxyethylene polyether) PEIPPOPEO into a three-necked flask with a thermometer, add tetrahydrofuran and p-toluenesulfonic acid to make it uniform Mix, heat to reflux temperature and stir at constant temperature for 6 hours, pass nitrogen to protect it; wait for it to cool, neutralize the solution with sodium hydroxide ethanol solution to make the pH equal to 7, filter and dry until the quality does not change, that is The product SMA-g-PEIPPOPEO was obtained.

[0025] (2) Dissolve solid polytetrafluoroethylene (PTFE) powder and SMA-g-PEIPPOPEO powder in dimethylacetamide (DMAc), add lithium chloride as a porogen, and prepare a casting solution with a concentration of 20wt% , heated and stirred at 70°C for 8h, dissolved into a transparent homogeneous solution, and left at...

Embodiment 2

[0026] Embodiment 2 The influence of the blending ratio of the present invention on the wettability of oil-water separation membrane

[0027] Prepare superhydrophilic polytetrafluoroethylene oil-water separation membrane with the method described in embodiment 1, wherein SMA-g-PEIPPOPEO and PTFE blending ratio are respectively 0:1,0.2:1,0.4:1,0.6:1,0.8 :1 and 1:1, respectively recorded as M-0, M-1, M-2, M-3, M-4 and M-5. The surface contact angle of the prepared superhydrophilic polytetrafluoroethylene oil-water separation membrane was measured by an optical contact angle measuring instrument. The contact angle of pure water on the surface of the ungrafted PTFE / styrene maleic anhydride blend film is only 105.5°, showing strong hydrophobicity. With the increase of SMA-g-PEIPPOPEO, the hydrophilic group increases and the contact angle gradually decreases. When the blending ratio is 0.4:1, it is reduced to 16.5°, realizing superhydrophilic properties. However, when SMA-g-PEIPP...

Embodiment 3

[0028] Embodiment 3 Performance determination of superhydrophilic polytetrafluoroethylene oil-water separation membrane of the present invention

[0029] Taking the superhydrophilic polytetrafluoroethylene oil-water separation membrane M-2 prepared in Example 2 as the experimental object, at room temperature, the separation performance of different oil-water emulsions was measured using a filter device. The oil-water emulsion was obtained by stirring 0.5g sodium lauryl sulfate, 10mL kerosene and 1L water at room temperature for 3h. The separation results are shown in the table below.

[0030] Table 1

[0031]

[0032]

[0033] *Separation efficiency = (TOC of raw solution before membrane separation-TOC in permeate of membrane separation) / TOC of raw solution before membrane separation

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Abstract

The invention discloses a preparation method of a demulsifier functionalized oil-water separation membrane. The preparation method comprises the following steps: (1) putting styrene/maleic anhydride (SMA) and polyethyleneimine polyoxypropylene polyoxyethylene polyether (PEIPPOPEO) into a flask according to a certain ratio. Amphiphilic SMA-g-PEIPPOPEO is prepared, polytetrafluoroethylene is selected as a base material, and polytetrafluoroethylene is blended with the SMA-g-PEIPPOPEO to prepare a membrane so as to obtain the superhydrophilic polymer membrane with a demulsification effect. demulsifier functionalized oil-water separation membrane is of an asymmetric structure, comprises a compact skin layer, a finger-shaped middle layer and a spongy bottom layer structure, has an excellent separation performance on an oil-water emulsion with a stable emulsifier, has a good reuse performance in the use process, and can be applied to the fields of oil-water separation, offshore oil leakage and the like.

Description

technical field [0001] The invention belongs to the technical field of functional polymer membrane separation, and in particular relates to a preparation method of a demulsifier-functionalized oil-water separation membrane. Background technique [0002] Oil-water mixture is a common environmental pollutant, which has a wide range of sources, from petroleum industry, manufacturing industry, transportation industry and other fields to food and catering, medicine and household life. With the continuous development of social economy, the discharge of oily wastewater is increasing, and the sources are becoming more and more extensive, causing serious environmental pollution and serious waste of water resources. Considering environmental management, recovery of various oils, and water reuse, it is imperative to separate oil and water from oil-water mixtures. [0003] The interfacial film formed by oil and water hinders the polymerization between water droplets, resulting in diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/78B01D71/36B01D69/06B01D69/02B01D61/02B01D17/022
CPCB01D17/02B01D61/027B01D69/02B01D69/06B01D71/36B01D71/78B01D2325/36
Inventor 严峰汪武卫陈洁徐灿闫浩
Owner 淮安晶彩新材料科技有限公司
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