Hydrophilic oleophobic polymer and preparation method thereof, and application thereof in humidity response oil and water separating membrane
An oil-water separation membrane, hydrophilic and oleophobic technology, used in semi-permeable membrane separation, chemical instruments and methods, osmotic/dialysis water/sewage treatment, etc. Inexpensive, easy to clean and reuse effects
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[0038] Example 1: FPVA / SiO 2 / GA composite stainless steel wire mesh oil-water separation omentum
[0039] (1) Put a piece of 15×15mm 2 The 300 mesh stainless steel wire mesh was immersed in distilled water, ethanol or acetone, and distilled water in order, respectively, and ultrasonically cleaned at 150W, 40KHz for 8 minutes, and hung it to dry at room temperature;
[0040] (2) Dissolve polyvinyl alcohol (Sinopec AH26) in hot water above 95℃, prepare a 5% solution, cool, and combine trifluoroacetic acid (Wuhan Defu Economic Development Co., Ltd.) with polyvinyl alcohol The functional group molar ratio is 1:1, the esterification reaction is carried out, and the fluorine-containing segment is grafted to obtain the first type of hydrophilic and oleophobic polymer.
[0041] The Perkin-Elmerspectrum-2000 Fourier Transform Infrared Spectrometer was used to determine the structural changes during the synthesis of the new hydrophilic and oleophobic polymer. The infrared spectrogram is shown...
Example Embodiment
[0048] Example 2: FPVA / SiO 2 / EA copper wire mesh oil-water separation membrane preparation
[0049] (1) Put a piece of 15×15mm 2 The 100 mesh copper wire mesh was immersed in distilled water, ethanol, and distilled water in order, and washed at 100W, 20KHz for 10 minutes, and hung up to dry at room temperature;
[0050] (2) Polyvinyl alcohol (Sinopec 1799) is dissolved in hot water above 95℃ to prepare a 5% solution, cooled, and the polyvinyl alcohol is first carboxyethylated with monochloroacetic acid to convert all hydroxyl groups. As carboxyethyl, perfluorotriethylamine (Wuhan Defu Economic Development Co., Ltd.) and carboxyethylated polyvinyl alcohol are mixed according to the functional group molar ratio of 1:1, and the neutralization reaction is carried out to graft the fluorine-containing segment. The second type of hydrophilic and oleophobic polymer was obtained, and the Perkin-Elmerspectrum-2000 Fourier Transform Infrared Spectrometer was used to determine the structural ...
Example Embodiment
[0057] Example 3: FPVA / SiO 2 / GA composite stainless steel wire mesh oil-water separation omentum
[0058] (1) Put a piece of 15×15mm 2 The 200-mesh aluminum wire mesh was immersed in distilled water, ethanol or acetone, and distilled water in order, respectively, and ultrasonically cleaned at 150W, 40KHz for 10 minutes, and hung it to dry at room temperature;
[0059] (2) Dissolve polyvinyl alcohol in hot water above 95℃ to prepare a 5% solution, cool it, and firstly react polyvinyl alcohol (Sinopec 2499) with monochloroacetic acid carboxyethylation to convert all hydroxyl groups As carboxyethyl, perfluorotributylamine (Wuhan Defu Economic Development Co., Ltd.) and carboxyethylated polyvinyl alcohol are mixed according to the functional group molar ratio of 1:4, and the neutralization reaction is carried out to graft the fluorine-containing segment. The second type of hydrophilic and oleophobic polymer was obtained, and the Perkin-Elmerspectrum-2000 Fourier Transform Infrared Spe...
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