A continuous oil-water separation membrane and its preparation method

A technology of oil-water separation membrane and ionized water, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., which can solve the problems of stimulation, complex operation process of multi-phase oil-water separation, cumbersome preparation process and other problems

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the context of the prior art discussed, the purpose of the present invention is to disclose a continuous oil-water separation membrane and its preparation method, which solves the problems of relatively cumbersome research and preparation processes and complex multi-phase oil-water separation operations. Questions that require external stimuli

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  • A continuous oil-water separation membrane and its preparation method
  • A continuous oil-water separation membrane and its preparation method
  • A continuous oil-water separation membrane and its preparation method

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Embodiment 1

[0029] Star heteroarm triblock copolymer (PDMS) used in the following embodiment 2 64 (PDMAEMA) 148 (PIPSMA) 25 The preparation process includes the following steps (refer to Figure 4 ):

[0030] First, monoglycidyl ether-terminated polydimethylsiloxane (15.5284 g, 3.1 mmol), isopropanol (75 mL), sodium azide (NaN 3 ) in water (1.0093 g, 15.5 mmol). Add appropriate amount of glacial acetic acid to adjust the pH of the system to about 6. Finally, the 250mL round-bottomed flask was heated and stirred in a 50°C oil bath. After the reaction is complete, add n-hexane to the system to dilute, and wash with saturated sodium bicarbonate solution, deionized water and saturated sodium chloride solution successively, and the upper layer liquid obtained by extraction is stirred and dried with anhydrous magnesium sulfate for 5 hours and then filtered, and the filtrate is in After removing the solvent by rotary evaporation at room temperature, place it in a vacuum oven and dry it at ...

Embodiment 2

[0039] A kind of preparation of continuous oil-water separation membrane, comprises the following steps:

[0040] S1, the 4*4cm 2 The 250-mesh cotton cloth was soaked successively for 3 times with deionized water, acetone, and ethanol, and placed in a vacuum drying chamber to dry at room temperature for subsequent use;

[0041] S2, 0.15g polymer (PDMS) 64 (PDMAEMA) 148 (PIPSMA) 25 (Refer to Example 1 for the preparation method) into 7.5mL isopropanol, under the action of magnetic stirring, to obtain polymer isopropanol solution;

[0042] S3. Immerse the cotton cloth treated in step S1 into the solution obtained in step S2 for 20 minutes, take it out, put it in a vacuum drying oven, heat and cross-link at 160° C. for 4 hours;

[0043] S4. Immerse the cotton cloth treated in step S3 into 80 mL of isopropanol, heat it at 400 rpm to 55° C. for washing under the condition of magnetic stirring, and repeat this step 4 times;

[0044] S5. Put the cotton cloth treated in step S4 i...

Embodiment 3

[0047] A kind of preparation of continuous oil-water separation membrane, comprises the following steps:

[0048] S1, the 4*4cm 2 The 270-mesh cotton cloth was soaked twice with deionized water, acetone, and ethanol successively, and placed in a vacuum drying chamber to dry at room temperature for subsequent use;

[0049] S2, 0.15g polymer (PDMS) 64 (PDMAEMA) 121 (PIPSMA) 24 (Refer to Example 1 for the preparation method) into 5mL of isopropanol, under the action of magnetic stirring, to obtain polymer isopropanol solution;

[0050] S3. Immerse the cotton cloth treated in step S1 into the solution obtained in step S2 for 30 minutes, take it out, put it in a vacuum drying oven, heat and cross-link at 170° C. for 5 hours;

[0051] S4. Immerse the cotton cloth treated in step S3 into 100 mL of isopropanol, heat it at 500 rpm to 60° C. and wash it under the condition of magnetic stirring, and repeat this step 3 times;

[0052] S5. Put the cotton cloth treated in step S4 into ...

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Abstract

The invention discloses a continuous oil-water separation membrane and a preparation method thereof. The preparation method comprises: S1, soaking cotton cloth with deionized water, acetone and ethanol in sequence, and vacuum drying at room temperature; The copolymer is added to isopropanol, and mixed evenly to obtain a polymer solution; S3, soaking the cotton cloth treated in step S1 in the polymer solution obtained in step S2, and then heating and crosslinking; S4, soaking the cotton cloth treated in step S3 into isopropanol, heated and washed under stirring; S5, drying the cotton cloth treated in step S4 to obtain the continuous oil-water separation membrane. Through a simple soak-thermal crosslinking method, the ABC star-shaped hetero-arm triblock copolymer is grafted onto the surface of the cotton cloth, so that the surface of the cotton cloth has adjustable wettability, and can separate heavy oil / water / light oil ternary oil-water mixture. The method is simple in operation, mild in preparation conditions, low in equipment requirements, and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation, and in particular relates to a continuous oil-water separation membrane and a preparation method thereof. Background technique [0002] In recent years, oil spill accidents have occurred frequently, and oily wastewater generated in chemical and metal processing processes has increased. The efficient separation of oil-water mixtures has become a worldwide problem that needs to be solved urgently. At present, a variety of oil-water separation technologies have been developed, such as: gravity separation, centrifugal separation, electrical separation, adsorption separation, air flotation separation and membrane separation. Among them, the membrane filtration method has a remarkable effect, but when the density of the non-permeable phase is greater than that of the permeable phase, the membrane separation process will be blocked by the non-permeable phase and cannot proceed. For example...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/02B01D61/38B01D17/022
CPCB01D17/02B01D61/38B01D67/0002B01D67/0006B01D69/02B01D2325/36
Inventor 洪良智肖美娜
Owner SOUTH CHINA UNIV OF TECH
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