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An ultra-hydrophilic 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 multi-level micro-nano structure damage, and achieve the effects of simple process, stable surface performance and mild conditions

Active Publication Date: 2017-11-17
NINGBO SHUIYI FILM TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the softness of this type of polymer material, it is easy to cause the multi-level micro-nano structure built on the surface of the membrane material to be damaged by external physical or chemical effects.

Method used

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

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preparation example Construction

[0027] The invention provides a kind of preparation method of superhydrophilic polymer microporous membrane, it comprises the following steps:

[0028] S1, carrying out a copolymerization reaction of polyalkoxysilane and hydrophilic monomer in an organic solvent under the action of a catalyst to obtain a hydrophilic modified siloxane prepolymer solution;

[0029] S2, adding inorganic nanoparticles to the hydrophilic modified siloxane prepolymerization liquid to modify the inorganic nanoparticles to obtain an emulsion containing hydrophilic modified inorganic nanoparticles; and

[0030] S3, coating the emulsion containing the hydrophilic modified inorganic nanoparticles on the surface of the polymer microporous membrane to form a hydrophilic coating to obtain the superhydrophilic polymer microporous membrane.

[0031] In step S1, the temperature of the copolymerization reaction is 40°C to 100°C, preferably 50°C to 70°C. The time for the copolymerization reaction is 2 hours to ...

Embodiment 1

[0045] (1) Add 3g of hydroxyethyl methacrylate, 2g of vinyltrimethoxysilane and 0.06g of benzoyl peroxide to 100mL of dehydrated ethanol in turn, pass through industrial nitrogen, and 200r at room temperature / min Mechanical stirring for 20min. Then heat and gradually increase the temperature to 65° C., and react with mechanical stirring at 200 r / min for 36 hours in an industrial nitrogen atmosphere. Turn off the heating, and obtain a hydrophilic hydroxyethyl methacrylate / vinyltrimethoxysilane copolymer prepolymer liquid after fully cooling down.

[0046] (2) Add 5g of nano-zinc oxide particles to the hydrophilic hydroxyethyl methacrylate / vinyl trimethoxysilane copolymer pre-polymerization solution, and ultrasonically treat it for 20 minutes to obtain a nano-zinc oxide particle containing hydrophilic modification lotion.

[0047] (3) The emulsion containing the hydrophilic modified nano-zinc oxide particles is evenly coated on the surface of the polyvinylidene fluoride micro...

Embodiment 2

[0050] (1) Add 4g of N-vinylpyrrolidone, 3g of vinyltriethoxysilane and 0.1g of azobisisoheptylcyanide to 100mL of absolute ethanol in sequence, feed high-purity nitrogen, and Under 250r / min mechanical stirring for 30min. Then heat and gradually increase the temperature to 80° C., and react with mechanical stirring at 250 r / min for 24 hours in an industrial nitrogen atmosphere. Turn off the heating, and obtain a hydrophilic N-vinylpyrrolidone / vinyltriethoxysilane copolymer prepolymer liquid after cooling down sufficiently.

[0051] (2) Add 6 g of nano-titanium dioxide particles to the hydrophilic N-vinylpyrrolidone / vinyltriethoxysilane copolymer prepolymerization solution, and perform ultrasonic treatment for 40 minutes to obtain an emulsion containing hydrophilic modified nano-titanium dioxide particles.

[0052] (3) The emulsion containing the hydrophilic modified nano-titanium dioxide particles is evenly coated on the surface of the polyvinylidene fluoride microporous memb...

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Abstract

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

Description

technical field [0001] The invention relates to the field of membrane surface modification, in particular to a superhydrophilic 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. Membrane materials are used in the separation of various oil-water mixtures and their stable emulsions due to their advantages of high efficiency, high flux, continuous separation operation and low cost. Among them, in the application of more water and less oil or the separation of trace oil in water, membrane materials with super-hydrophilic characteristics are generally selected. [0003] In the research on the preparation of superhydrophilic membrane materials, superhydrophilic omentum materials first appeared. For example, in literature (Langmuir, 2014, 30(39), 11761), a superhydrophilic hydrophobic Oil s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D71/34B01D71/48B01D71/68B01D71/42B01D71/16B01D71/26
CPCB01D67/0079B01D69/02B01D71/16B01D71/26B01D71/34B01D71/42B01D71/48B01D71/68B01D2323/02B01D2325/36
Inventor 叶建荣刘富计根良林海波沈立强
Owner NINGBO SHUIYI FILM TECH DEV CO LTD
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