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Oleophobic coating material, oil-water separation functional material, preparation method thereof and use thereof

A coating material and oil-water separation technology, applied in separation methods, coatings, liquid separation, etc., can solve the problems of loss of wetting properties on the membrane surface, high cost, and difficulty in large-scale preparation, and achieve excellent underwater oleophobic properties, Suitable for industrial production, good anti-pollution performance

Inactive Publication Date: 2019-02-26
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of super-wetting separation membrane material based on surface micro-nano structure is very easy to be polluted by colloids, microorganisms, etc. during use, resulting in the loss of the wettability of the membrane surface.
In addition, the construction of micro-nano structures on the surface of the separation membrane often requires a complex preparation process, the process is complicated, the cost is high, and it is difficult to achieve large-scale preparation.

Method used

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  • Oleophobic coating material, oil-water separation functional material, preparation method thereof and use thereof
  • Oleophobic coating material, oil-water separation functional material, preparation method thereof and use thereof
  • Oleophobic coating material, oil-water separation functional material, preparation method thereof and use thereof

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preparation example Construction

[0041] Specifically, the preparation method of the present invention comprises:

[0042] A solution containing more than one first ionic compound and a solution containing more than one second ionic compound are alternately coated on the substrate, so that more than one first ionic compound and more than one second ionic compound A cross-linked network structure is formed through intermolecular interactions, wherein at least one first ionic compound and at least one second ionic compound have opposite charges.

[0043] Preferably, any one of the first ionic compound and the second ionic compound is an anionic compound, and the other is a cationic compound.

[0044] If the cationic compound (also referred to as a class A compound) is polyethyleneimine, chitosan and / or chitosan derivatives, polyvinylamine hydrochloride, polyimidazole ionic liquid, polyquaternium One or more in cationic compounds such as type ionic liquid, polydimethyldiallylammonium chloride, polydimethylaminoeth...

Embodiment 1

[0079] Step 1: Dissolve polydimethyldiallylammonium chloride with a molecular weight of 10,000 in pure water to form an aqueous solution with a concentration of 1 wt%, and then use 0.1M dilute hydrochloric acid solution to adjust the pH of the aqueous solution to 4 , the prepared solution is marked as component A solution;

[0080] Step 2: Dissolve commercially available ethylenediaminetetraacetic acid in pure water to prepare an aqueous solution with a concentration of 1 wt%, and then use 0.1M dilute hydrochloric acid solution to adjust the pH of the aqueous solution to 4, and the prepared solution is labeled For component B solution;

[0081] Step 3: Wash the polyvinylidene fluoride microfiltration membrane with a pore size of 0.45 μm with ethanol and pure water for 10 minutes, and then dry it for later use;

[0082] Step 4: Immerse the cleaned polyvinylidene fluoride microfiltration membrane into the component A solution, let it stand for 30 minutes, then take it out to dr...

Embodiment 2

[0087] Step 1: Dissolve polydimethyldiallylammonium chloride with a molecular weight of 100,000 in pure water to form an aqueous solution with a concentration of 5 wt%, and then adjust the pH of the aqueous solution to 4 with 0.1M dilute hydrochloric acid solution , the prepared solution is marked as component A solution;

[0088] Step 2: Dissolve commercially available ethylenediaminetetraacetic acid in pure water to prepare an aqueous solution with a concentration of 3wt%, and then use 0.1M dilute hydrochloric acid solution to adjust the pH of the aqueous solution to 4. The prepared solution is labeled For component B solution;

[0089] Step 3: ultrasonically clean the porous ceramic membrane with a pore size of 10 μm with ethanol and pure water for 10 minutes, and then dry it for later use;

[0090] Step 4: Immerse the dried porous ceramic membrane into the component A solution, let it stand for 30 minutes, then take it out to dry; then immerse the porous ceramic membrane ...

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Abstract

The invention discloses an oleophobic coating material, an oil-water separation functional material, a preparation method thereof and use thereof. The oleophobic coating material includes a crosslinked network structure formed by intermolecular interaction of two or more ionic compounds, and wherein at least two ionic compounds carry opposite charges. The oil-water separation functional material comprises a porous substrate and the oleophobic coating material, and the oleophobic coating material is distributed at least on a surface of the substrate and a through-hole wall. The oleophobic coating material and the oil-water separation functional material of the invention have the characteristics of super hydrophilicity, underwater super oleophobicity and low oil adhesion, and have stable performance in acid and alkali and various salt solution environments, and can be applied to the fields of the anti-oil contaminated surface, the self-cleaning surface, oil / water separation, oil-water emulsion demulsification and the like.

Description

technical field [0001] The invention belongs to the fields of chemical engineering, functional materials and nanotechnology, and particularly relates to an ionic oleophobic coating material with properties of superhydrophilicity, underwater superoleophobicity, and ultralow oil adhesion, and based on this oleophobic coating material. The oil-water separation functional material of the coating material and its preparation method and application. Background technique [0002] Oil-water mixing systems are widely used in many fields of industrial production and residential life, especially in petroleum exploration, petrochemical, textile, metal processing, transportation, energy and other industries. In addition, accidents such as oil spills also produce large amounts of oil-water mixtures. Direct discharge of these oily wastewater will cause serious damage to the ecological environment, and also cause a great waste of resources. Recycling and utilizing useful phases in oily wa...

Claims

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Application Information

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IPC IPC(8): C09D139/00C09D105/04C08J7/04C02F1/40C02F1/44C08L27/16C08L33/20C08L77/00C08J7/056
CPCC09D105/04C09D139/00C02F1/40C02F1/44C02F1/441C02F1/442C02F1/444C08J7/042C08J2339/00C08J2433/20C08J2427/16C08J2477/00B01D17/02C08L27/16C08L33/20C08L77/00C08J7/056
Inventor 靳健朱玉长
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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