Nano-silicon dioxide/nano-fiber oil-water separation composite film and preparation method thereof
A nano-silica and nano-fiber technology, applied in the field of membrane engineering, can solve the problems of inability to be used repeatedly or continuously for a long time, not suitable for large-scale production and use, poor anti-pollution ability, etc., to increase strength, strengthen ability, the effect of improving the hydrophilicity
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[0027] Example 1
[0028] The preparation method of nano silica / nano fiber oil-water separation composite membrane includes the following steps:
[0029] 1) Preparation of nano silica solution
[0030] The hydrophilic nano silica particles are mixed with polyacrylamide and then dissolved in an ethanol solvent to obtain a nano silica solution; wherein the mass ratio of the hydrophilic nano silica particles to the polyacrylamide is 2:8.
[0031] 2) Preparation of nanofiber suspension
[0032] The polyvinyl alcohol (PVA) nanofibers processed by the high-speed shearing machine are dispersed in an ethanol solvent to obtain a nanofiber suspension; the mass percentage concentration of the PVA nanofibers in the nanofiber suspension is 0.5%.
[0033] 3) Preparation of nano silica / nano fiber oil-water separation composite membrane
[0034] The nano-silica solution and the nano-fiber suspension are uniformly mixed by a high-speed disperser to obtain a film-forming liquid. The mass ratio of the nano-...
Example Embodiment
[0036] Example 2
[0037] The preparation method of nano silica / nano fiber oil-water separation composite membrane includes the following steps:
[0038] 1) Preparation of nano silica solution
[0039] The hydrophilic nano silica particles and polyvinylpyrrolidone are mixed and dissolved in an acetic acid solvent to obtain a nano silica solution; wherein the mass ratio of the hydrophilic nano silica particles to the polyvinylpyrrolidone is 9:1.
[0040] 2) Preparation of nanofiber suspension
[0041] The polyethylene glycol (PEG) nanofibers processed by the high-speed shearing machine are dispersed in an acetic acid solvent to obtain a nanofiber suspension; the mass percentage concentration of the PEG nanofibers in the nanofiber suspension is 60%.
[0042] 3) Preparation of nano silica / nano fiber oil-water separation composite membrane
[0043] The nano-silica solution and nano-fiber suspension are uniformly mixed through an emulsifier to obtain a film-making liquid. The mass ratio of the...
Example Embodiment
[0045] Example 3
[0046] The preparation method of nano silica / nano fiber oil-water separation composite membrane includes the following steps:
[0047] 1) Preparation of nano silica solution
[0048] The hydrophilic nano silica particles are mixed with polyvinyl alcohol and then dissolved in an acetone solvent to obtain a nano silica solution; wherein the mass ratio of the hydrophilic nano silica particles to the polyvinyl alcohol is 1:3.
[0049] 2) Preparation of nanofiber suspension
[0050] The polyacrylic acid (PAA) nanofibers processed by the high-speed shearing machine are dispersed in a methanol solvent to obtain a nanofiber suspension; the mass percentage concentration of the PAA nanofibers in the nanofiber suspension is 10%.
[0051] 3) Preparation of nano silica / nano fiber oil-water separation composite membrane
[0052] The nano-silica solution and nano-fiber suspension are uniformly mixed by a high-speed disperser to obtain a film-making liquid. The mass ratio of the nano-s...
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