A kind of superhydrophobic polymer microporous membrane and its manufacturing method
A polymer and microporous membrane technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as damage and achieve stable surface properties
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[0028] The invention provides a kind of preparation method of superhydrophobic polymer microporous film, and it comprises the following steps:
[0029] S1, dissolving polyalkoxysilanes terminated with hydrophobic groups in an organic solvent to obtain a mixture;
[0030] S2, adding inorganic nanoparticles to the mixture to hydrophobically modify the inorganic nanoparticles to obtain an emulsion containing hydrophobically modified inorganic nanoparticles; and
[0031] S3, coating the emulsion containing hydrophobically modified inorganic nanoparticles on the surface of the polymer microporous membrane to form a hydrophobic coating to obtain the superhydrophobic polymer microporous membrane.
[0032] In step S1, the function of the polyalkoxysilane terminated with a hydrophobic group is to modify the inorganic nanoparticles hydrophobically. The polyalkoxysilanes in the polyalkoxysilanes terminated with hydrophobic groups are methyltrimethoxysilane, ethyltriethoxysilane, propylt...
Embodiment 1
[0046] (1) 5 g of methyltrimethoxysilane was dissolved in absolute ethanol, and ultrasonically treated for 10 minutes to obtain a mixture.
[0047] (2) Add 5 g of nanometer zinc oxide particles to the mixture, and ultrasonically treat it for 20 minutes to obtain an emulsion containing hydrophobically modified nanometer zinc oxide particles.
[0048] (3) The emulsion containing the hydrophobically modified nano-zinc oxide particles is evenly coated on the surface of the polyvinylidene fluoride microporous membrane formed by peeling off the non-woven fabric to form a multi-scale micro-nano structure surface by scraping, and dried , to obtain a superhydrophobic polyvinylidene fluoride microporous membrane.
[0049] A performance test was performed on the superhydrophobic polyvinylidene fluoride microporous membrane. The result is: the surface water droplet contact angle of the superhydrophobic polyvinylidene fluoride microporous membrane is 152°. The prepared superhydrophobic p...
Embodiment 2
[0051] (1) 1 g of perfluorooctyltriethoxysilane was dissolved in absolute ethanol, and ultrasonically treated for 20 minutes to obtain a mixture.
[0052] (2) Add 6 g of nanometer titanium dioxide particles to the mixture, and ultrasonically treat it for 40 minutes to obtain an emulsion containing hydrophobically modified nanometer titanium dioxide particles.
[0053] (3) The emulsion containing the hydrophobically modified nano-titanium dioxide particles is evenly coated on the surface of the polyvinylidene fluoride microporous membrane formed by peeling off the non-woven fabric to form a multi-scale micro-nano structure surface by spin coating (see figure 1 ), and dried to obtain a superhydrophobic polyvinylidene fluoride microporous membrane.
[0054] The superhydrophobic polyvinylidene fluoride microporous membrane is subjected to a morphology test, and the results are shown in figure 2 and image 3 . Depend on figure 2 It can be seen that the surface of the polyviny...
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Abstract
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