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Oil water separation nanofiber membrane with CO2 stimulus response as well as preparation method and application thereof

A nanofiber membrane, oil-water separation technology, applied in separation methods, liquid separation, semi-permeable membrane separation and other directions, can solve the problems affecting the reversibility of the system circulation, diluted solution, salt accumulation, etc., to achieve low price, efficient preparation process, good stability

Active Publication Date: 2015-08-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the material shows a good oil-water separation effect, in actual operation, adjusting the pH of the system by adding acid and alkali will not only cause the accumulation of salt, but also dilute the solution, affecting the cycle reversibility of the system

Method used

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  • Oil water separation nanofiber membrane with CO2 stimulus response as well as preparation method and application thereof
  • Oil water separation nanofiber membrane with CO2 stimulus response as well as preparation method and application thereof
  • Oil water separation nanofiber membrane with CO2 stimulus response as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1, the preparation of oil-water separation nanofibrous membrane

[0053] (1) Synthesis of random copolymer PMMA-co-PDEAEMA

[0054] as per figure 1 Synthetic steps shown in (a) are synthesized: in a 100mL round bottom flask, monomer methyl methacrylate (abbreviated as MMA, 4.0g, 40mmol), DEAEMA (11g, 60mmol) and initiator azobisisobutyl Nitrile (abbreviated as AIBN, 33 mg, 0.2 mmol) was dissolved in 50 mL of dioxane, and magnetically stirred for half an hour. Subsequently, the reaction solution was subjected to liquid nitrogen freezing-gas pumping-nitrogen gas filling, each pumping for 15 minutes, and the cycle was repeated three times. After the oxygen in the reaction system was completely removed, it was under the protection of nitrogen. The reaction bottle was placed in a 75°C oil bath, stirred by a magnet, and reacted for 24 hours. After the reaction, the reaction bottle was quickly placed in liquid nitrogen, and the gas was vented to communicate with...

Embodiment 2

[0067] Embodiment 2, the preparation of oil-water separation nanofibrous membrane

[0068] (1) Synthesis of random copolymer PMMA-co-PDEAEMA

[0069] as per figure 1 (a) Synthetic steps shown in: In a 100mL round bottom flask, monomer MMA (2.0g, 20mmol) and DEAEMA (11g, 60mmol), initiator AIBN (11mg, 0.07mmol) were dissolved in 40mL of dioxygen In six rings, stir magnetically for half an hour. Subsequently, the reaction solution was subjected to liquid nitrogen freezing-gas pumping-nitrogen gas filling, each pumping for 15 minutes, and the cycle was repeated three times. After the oxygen in the reaction system was completely removed, it was under the protection of nitrogen. The reaction bottle was placed in a 75°C oil bath, stirred by a magnet, and reacted for 20 hours. After the reaction, the reaction bottle was quickly placed in liquid nitrogen, and the gas was vented to communicate with the atmosphere to terminate the reaction. After the system was cooled to room tempe...

Embodiment 3

[0080] Embodiment 3, the preparation of oil-water separation nanofibrous membrane

[0081] (1) Synthesis of random copolymer PMMA-co-PDEAEMA

[0082] The preparation method is the same as in Example 1.

[0083] (2) Preparation of PMMA-co-PDEAEMA spinning solution

[0084] The preparation method is the same as in Example 2.

[0085] (3) Preparation of PMMA-co-PDEAEMA nanofibrous membrane

[0086] Such as figure 1 As shown in (b), the spinning solution obtained in step (2) was placed in a 2mL syringe containing a metal nozzle (16 gauge), the distance between the nozzle and the cylindrical receiver was 20cm, and the injection speed was set to 1mL h -1 , the voltage is set to 20kV. When the nanofibers are interwoven and arranged, the ambient temperature is 35° C., the humidity is 54%, and the time is 12 hours. The obtained nanofiber membrane is dried in a vacuum oven at 50° C. for 24 hours to obtain an oil-water separation nanofiber membrane with a thickness of 110 μm.

[0...

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Abstract

The invention discloses an oil water separation nanofiber membrane with CO2 stimulus response as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a random copolymer and a solvent to obtain spinning solution, wherein the random copolymer is polymethyl methacrylate-2-Diethylaminoethyl Methacrylate; (2) performing electrostatic spinning on the spinning solution to obtain nanofibers, and interweaving and arranging the nanofibers to obtain the nanofiber membrane. The oil water separation nanofiber membrane is applied to oil water separation. The nanofiber membrane prepared by utilizing an electrostatic spinning technology has a CO2 stimulus response function, can selectively perform oil water separation, is low in cost, simple and convenient to operate, clean and environment-friendly, and has better separation effects for various oil-water mixed systems.

Description

technical field [0001] The present invention relates to a CO 2 A stimuli-responsive oil-water separation nanofiber membrane and a preparation method and application thereof belong to the technical field of oil-water separation. Background technique [0002] In recent years, with the increasing number of oily sewage and oil field leakage accidents, oil-water separation has become a common challenge faced by the whole world. The development of interface materials with special wettability will help the treatment and recycling of oily sewage and promote the sustainable development of industrial society. With the development of nanotechnology, interface chemistry and polymer science, "smart" interface materials with special wettability to oil and water have been continuously developed, and then used for two-way oil-water separation, that is, to selectively separate oil and water from separated from the oil-water mixture. [0003] So far, polymers that respond to stimuli such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D69/02B01D67/00B01D17/022
Inventor 袁金颖车海龙霍猛彭了方立城刘娜冯琳危岩
Owner TSINGHUA UNIV
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