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An ultra-hydrophobic polymer microporous membrane and a preparing method thereof

A polymer and microporous membrane technology, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve problems such as damage, and achieve the effect of simple process, stable surface performance and mild conditions

Active Publication Date: 2017-11-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of polymer material itself is relatively flexible, so it is easily damaged by external physical or chemical effects.

Method used

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  • An ultra-hydrophobic polymer microporous membrane and a preparing method thereof
  • An ultra-hydrophobic polymer microporous membrane and a preparing method thereof
  • An ultra-hydrophobic polymer microporous membrane and a preparing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[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

The invention relates to an ultra-hydrophobic polymer microporous membrane. The ultra-hydrophobic polymer microporous membrane includes a polymer microporous membrane and a hydrophobic coating attached to the surface of the polymer microporous membrane. The hydrophobic coating is a crosslinked layer comprising hydrophobic modified inorganic nanometer particles. The hydrophobic modified inorganic nanometer particles are prepared by subjecting inorganic nanometer particles to hydrophobic modification by utilizing multi-alkoxy silane end-capped with hydrophobic groups. The invention also relates to a preparing method of the ultra-hydrophobic polymer microporous membrane.

Description

technical field [0001] The invention relates to the field of membrane surface modification, in particular to a superhydrophobic polymer microporous membrane and a preparation method thereof. Background technique [0002] At present, oil / water separation technology has important application value in scientific research, environmental protection, social life and so on. This is because on the one hand, oily wastewater such as industrial cold-rolled or hot-rolled steel, aluminum preparation, food, textile, leather, petrochemical and metal surface treatment has become a common source of domestic water pollution; on the other hand, the increasingly frequent crude oil spills Seriously damaged the marine ecological environment. However, traditional oil / water separation methods such as gravity, centrifugation, ultrasound, and air flotation have disadvantages such as low separation efficiency, high energy consumption, and secondary pollution, and they cannot separate emulsified oil-w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/34B01D71/48B01D71/68B01D71/42B01D71/16B01D71/26
CPCB01D67/0079B01D69/02B01D69/12B01D71/16B01D71/26B01D71/34B01D71/42B01D71/48B01D71/68B01D2323/04B01D2325/38
Inventor 刘富林海波
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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