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Super-hydrophilic oleophobic material, preparation method and applications thereof

A super-hydrophilic and oleophobic technology, applied in separation methods, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problem of poor chemical and thermal stability of organic polymer materials, high-viscosity oil anti-sticking Solve problems such as poor adhesion and separation limitations, and achieve fast and efficient separation performance, strong resistance to oil adhesion and pollution, and easy cleaning

Active 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

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Problems solved by technology

For example, the literature Adv.Mater., 2015, 27, 4162; Adv.Mater., 2016, 28, 5307; J.Membr.Sci., 2016, 513, 67 and patent (CN102029079A) have reported the use of Superhydrophilic and underwater superoleophobic oil-water separation materials and coatings have been prepared by coating superhydrophilic hydrogels. However, organic polymer materials have poor chemical and thermal stability, and their separation in harsh environments is limited. Therefore, it has become a new research direction in the industry to realize the separation of superhydrophilic and superoleophobic surfaces with excellent chemical stability by constructing inorganic nanomaterials and structures with high chemical stability.
In addition, traditional nanostructured superhydrophilic-superoleophobic separation materials have poor anti-adhesion properties for high-viscosity oils. These problems limit the use of such superhydrophilic-superoleophobic separation materials in the field of oily sewage separation.

Method used

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  • Super-hydrophilic oleophobic material, preparation method and applications thereof
  • Super-hydrophilic oleophobic material, preparation method and applications thereof
  • Super-hydrophilic oleophobic material, preparation method and applications thereof

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preparation example Construction

[0036] In some more specific embodiments, the preparation method of the superhydrophilic and oleophobic material comprises:

[0037] Provide metal substrate;

[0038] immersing the metal substrate in a phosphate solution containing 0.1-10 mol / L phosphate and 0.01-1 mol / L oxidizing agent for 0.5-6 hours, and the reaction temperature is 20-60°C to obtain the Said superhydrophilic and oleophobic materials,

[0039] Alternatively, the metal substrate and the cathode as the anode are placed in a phosphate solution with a concentration of 0.1 to 10 mol / L, and the potential difference between the cathode and the anode is 0.1 to 10V, and the reaction is performed for 10 minutes to 2 hours to prepare Obtain the superhydrophilic and oleophobic material.

[0040] More preferably, the oxidizing agent may be hydrogen peroxide, potassium persulfate, sodium persulfate, ammonium persulfate, etc., but not limited thereto.

[0041] More preferably, the phosphate includes any one or a combina...

Embodiment 1

[0110] (1) The 400-mesh copper mesh was respectively immersed in deionized water, ethanol and 0.1M hydrochloric acid solution for ultrasonic cleaning, then washed with deionized water and dried naturally.

[0111] (2) At room temperature, add 500 mL of water, 7.05 g of disodium hydrogen phosphate and 1.35 g of potassium persulfate into a beaker, stir and mix evenly to prepare a uniform reaction solution.

[0112] (3) soak the pre-cleaned copper mesh in step (1) in the solution to react, and the reaction time is 1 hour, so that the copper phosphate nanosheets are evenly coated on the surface of the copper mesh, and the omentum is taken out after the reaction is completed. Wash it repeatedly with deionized water, and dry it naturally in the air to obtain an oil-water separation omentum with super-hydrophilic and super-oleophobic properties in the air environment and underwater. The pore size of the omentum is about 20-25mm. microns, for surface topography see figure 1 .

[011...

Embodiment 2

[0117] (1) Dip the 20-mesh stainless steel mesh into deionized water and ethanol for ultrasonic cleaning, then wash it with deionized water and dry it naturally.

[0118] (2) At room temperature, add 500 mL of water, 23.4 grams of sodium dihydrogen phosphate, 88.6 grams of disodium hydrogen phosphate dodecahydrate, and 9.32 grams of ammonium persulfate, stir and mix evenly to prepare a uniform aqueous solution.

[0119] (3) Soak the pre-cleaned stainless steel net in step (1) in the solution to react, and the reaction time is 0.5 hour, thereby forming copper phosphate nanosheets covering the metal net on the surface of the metal net, and the length height of the nanosheet is about Take out the omentum after the reaction is completed, wash it repeatedly with deionized water, and dry it naturally in the air to obtain oil-water with super-hydrophilic and super-oleophobic properties in the air environment and underwater. Separate the omentum, the pore size of the omentum is about ...

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Abstract

The present invention discloses a super-hydrophilic oleophobic material, which comprises a metal substrate and a micro-nano structure, wherein the micro-nano structure grows on the metal substrate, and comprises a metal phosphate and / or a metal polyphosphate compound. According to the present invention, the super-hydrophilic oleophobic material has advantages of Super-hydrophilicity, underwater ultra-low oil adhesion, good chemical stability and good thermal stability, can resist oil, organic matters, biomass, bacteria, microorganisms and other pollutions, and can be used in the fields of anti-adhesion coatings, oil transportation, oil-water separation, oil spill interception and the like. The invention further discloses a preparation method and applications of the super-hydrophilic oleophobic material.

Description

technical field [0001] The invention belongs to the fields of chemical engineering, functional materials and nanotechnology, and particularly relates to a superhydrophilic and oleophobic material with properties of superhydrophilicity and underwater ultra-low oil adhesion, and a preparation method and application thereof. Background technique [0002] In the global industrial process, many oil-related industries and daily life produce a large amount of oily wastewater every year, and seriously endanger the environment and human health in many ways. Traditional oil-water separation technologies include centrifugal separation, settling tank and flotation technology, etc., but these separation technologies are time-consuming, energy-consuming and complicated to operate. In order to achieve high-efficiency oil-water separation, people have innovatively proposed membrane separation technology. In actual production and life, oily sewage mainly contains a large amount of water and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022B82Y40/00B82Y30/00C02F1/00
CPCB01D17/0202B82Y30/00B82Y40/00C02F1/00C02F2305/04C02F2305/08
Inventor 靳健张慎祥张丰
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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