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Preparation method of photo-thermal response nanofiber oil and water separation membrane

A technology of oil-water separation membrane and nanofiber membrane, which is applied in the field of preparation of nanofiber oil-water separation membrane with photothermal response, can solve problems such as poor strength, complicated preparation process, and limited application, and achieve high separation flow rate and high separation efficiency. Effect

Inactive Publication Date: 2018-04-06
NANJING FORESTRY UNIV
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Problems solved by technology

However, these preparation processes have the disadvantages of complex preparation process, environmental pollution, poor strength and high cost.
severely limit their practical application

Method used

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  • Preparation method of photo-thermal response nanofiber oil and water separation membrane

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Embodiment Construction

[0019] A method for preparing a photothermally responsive nanofiber oil-water separation membrane, comprising the following process steps:

[0020] (1) synthesis of polymethyl methacrylate-b-poly N-isopropylacrylamide (PMMA-b-PNIPAM); (a) synthesis of macromolecular initiator PMMA-Br, MMA (5mL, 47mmol), DMF ( 5mL), Cu(0) (15.04mg, 0.235mmol), N2H4·H2O (11.2μL, 0.235mmol), and Me 6 TREN (61.1μL, 0.235mmol) was added to a 25mL three-neck flask and stirred for 15min. Then, ethyl 2-bromoisobutyrate Eib-Br (34.4μL, 0.235mmol) was added as an initiator. The reaction was started at 90°C. Then chloroform The reacted mixture was diluted and passed through Al 2 o 3 The catalyst in the reaction is removed from the column. Finally, the macromolecular initiator PMMA-Br is obtained by methanol precipitation, and dried in a vacuum oven at 40°C. (b) Synthetic PMMA-b-PNIPAAm copolymer. Macromolecular initiator PMMA-Br (300mg, 0.025mmol), DMF / isopropanol mixed solvent (v / v%=2 / 1, 3mL), Cu(0) ...

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Abstract

The invention provides a preparation method of a photo-thermal response nanofiber oil and water separation membrane. The preparation method of the photo-thermal response nanofiber oil and water separation membrane includes the following steps that polymethyl methacrylate-b-poly-N- isopropylmethacrylamide (PMMA-b-PNIPAM) is synthesized; electrospinning is conducted on a polyurethane (PU) nanofibermembrane; a PMMA-b-PNIPAM membrane into which 1 wt% of carbon nanotubes and silver nanoparticles are added separately is subjected to electrospinning; a PU / PMMA-b-PNIPAM nanofiber membrane is subjected to coaxial electrospinning, wherein the carbon nanotubes and the silver nanoparticles are added into PMMA-b-PNIPAM separately; a contact angle experiment is adopted to represent the photo-thermal response performance of the PU / PMMA-b-PNIPAM nanofiber membrane; oil-water nano-emulsion separating experiments are conducted. The preparation method of the photo-thermal response nanofiber oil and water separation membrane has the advantages that by conducting surface modification on the fiber membrane, the PU / PMMA-b-PNIPAM nanofiber membrane which has biodegradability and photo-thermal response performance and is low in cost and free of toxicity is obtained; the high-performance PU / PMMA-b-PNIPAM nanofiber membrane has broad application prospects in oil and water separation, sewage treatment and deep-sea oil spill.

Description

technical field [0001] The invention relates to a preparation method of a nanofiber oil-water separation membrane with photothermal response, in particular a preparation method of a nanofiber oil-water separation membrane with photothermal response in a vacuum filtration system. Background technique [0002] Many stimuli-responsive nanofibrous membranes have been reported recently. Some external stimuli such as changes in pH, temperature, and light can change the wettability of the nanofibrous membrane surface. Therefore, a material that can allow oil to pass or water to pass according to changes in external conditions can provide great flexibility in the oil-water separation process. This stimuli-responsive feature allows remote operation or automatic emergency oil-water separation process. However, most of the reported stimuli-responsive aqueous superoleophilic or superoleophobic surfaces are obtained on the one hand through relatively expensive materials such as gold an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D01F8/16D01F1/10B01D69/02B01D17/022C02F1/44
CPCB01D17/02B01D69/02B01D2325/38C02F1/44D01D5/0015D01F1/10D01F8/16D04H1/728
Inventor 黄超伯马文静吴书天赵俊涛
Owner NANJING FORESTRY UNIV
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