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Preparation method of self-extinguishing, super-hydrophilic and underwater super-oleophobic coating

An underwater super-oleophobic and super-hydrophilic technology, used in coatings, devices for coating liquids on surfaces, special surfaces, etc., can solve the problems of poor mechanical durability, unstable performance, slow response, etc., and achieve a wide range of applications. Prospect, simple operation, low cost effect

Inactive Publication Date: 2019-10-11
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-extinguishing, super-hydrophilic, underwater super-oleophobic coating preparation method to solve the existing super-hydrophobic coating single performance, easy to be polluted by organic matter, poor mechanical durability, slow response, poor performance Instability and other issues

Method used

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  • Preparation method of self-extinguishing, super-hydrophilic and underwater super-oleophobic coating
  • Preparation method of self-extinguishing, super-hydrophilic and underwater super-oleophobic coating
  • Preparation method of self-extinguishing, super-hydrophilic and underwater super-oleophobic coating

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Embodiment 1

[0029] (1) Prepare a cationic polyelectrolyte (polyethyleneimine PEI) aqueous solution with a concentration of 4 mg / mL, an anionic polyelectrolyte (ammonium polyphosphate APP) with a concentration of 10 mg / mL, and an anion with a mass concentration of 8%. Polyelectrolyte (phytic acid PA) aqueous solution. The PET fabric was washed several times with water and ethanol, and then immersed in a 5 wt% NaOH aqueous solution for 10 minutes to make it negatively charged.

[0030] (2) The PET fabric treated with the NaOH aqueous solution was immersed in the PEI aqueous solution (4 mg / mL) for 10 minutes to load the PEI layer. The PEI coated fabric was then washed with deionized water and squeezed to remove excess water. Then it was soaked in PA aqueous solution (8 wt%) for 10 minutes and washed with water. Then the PEI / PA coated fabric is dried in an oven at 50°C to completely remove the excess water, and finally PEI / PA@PET fabric is obtained.

[0031] (3) Immerse the PEI / PA@PET fabric in...

Embodiment 2

[0038] (1) Prepare a cationic polyelectrolyte (polyethyleneimine PEI) aqueous solution with a concentration of 4 mg / mL, an anionic polyelectrolyte (ammonium polyphosphate APP) with a concentration of 10 mg / mL, and an anion with a mass concentration of 8%. Polyelectrolyte (phytic acid PA) aqueous solution. The iron net (4 cm*4 cm) was washed several times with water and ethanol, and then immersed in a 5 wt% NaOH aqueous solution for 10 minutes to make it negatively charged.

[0039] (2) Immerse the iron mesh in the PEI aqueous solution (4 mg / mL) for 10 minutes to load the PEI layer. Then wash with deionized water. Then it was soaked in PA aqueous solution (8 wt%) for 10 minutes and washed with water. Then the PEI / PA coated iron mesh was dried in an oven at 50°C to completely remove excess water, and finally PEI / PA @ SS mesh was obtained.

[0040] (3) Immerse the PEI / PA @ SS mesh in the PEI solution again for 10 minutes, then wash with deionized water. Then soak it in the aqueous...

Embodiment 3

[0053] (1) Prepare a cationic polyelectrolyte (polyethyleneimine PEI) aqueous solution with a concentration of 6 mg / mL, an anionic polyelectrolyte (ammonium polyphosphate APP) with a concentration of 15 mg / mL, and an anion with a mass concentration of 6%. Polyelectrolyte (phytic acid PA) aqueous solution. The sponge (4 cm*4 cm) was washed several times with water and ethanol, and then immersed in a 5 wt% NaOH aqueous solution for 10 minutes to make it negatively charged.

[0054] (2) Immerse the sponge in a PEI aqueous solution (6 mg / mL) for 10 minutes to load the PEI layer. Then wash with deionized water. Then it was soaked in PA aqueous solution (6 wt%) for 10 minutes and washed with water. Then the PEI / PA coated sponge was dried in an oven at 50°C to completely remove excess water, and finally PEI / PA@sponge was obtained.

[0055] (3) Immerse the PEI / PA@ sponge in the PEI solution again for 10 minutes, and then wash with deionized water. Then soak it in the aqueous APP (15mg / ...

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Abstract

The invention provides a preparation method of a self-extinguishing, super-hydrophilic and underwater super-oleophobic coating. The preparation method comprises the following steps that a, a cleaned matrix is soaked and treated by using a NaOH aqueous solution so as to obtain a matrix with a negative charge; b, the matrix with the negative charge is sequentially soaked and treated by using a polyethyleneimine aqueous solution and an phytic acid aqueous solution to obtain a matrix with a PEI / PA coating; c, the matrix with the PEI / PA coating is sequentially soaked and treated by using the polyethyleneimine aqueous solution and an ammonium polyphosphate aqueous solution to obtain a matrix with the PEI / PA / PEI / APP coating; and d, the matrix with the PEI / PA / PEI / APP coating just needs to be sequentially soaked and treated by using the polyethyleneimine aqueous solution and the phytic acid aqueous solution again. The preparation method has the advantages of being simple in operation, low in cost, environment-friendly and high in efficiency, and the prepared coating does not contain any fluorine-containing modifier, is suitable for any base material, and has a wide application prospect in the fields of fire resistance, liquid separation and water purification.

Description

Technical field [0001] The invention relates to the technical field of coating preparation, in particular to a preparation method of a self-extinguishing, super-hydrophilic, and underwater super-oleophobic coating. Background technique [0002] Nowadays, the rapid development of industry and technology is usually accompanied by serious environmental problems. Environmental issues have become a serious challenge to global sustainable development. Oil spills from industrial production or water polluted by oily / organic solvents pose a serious threat to the marine environment and marine life. Due to the urgent need to deal with such serious environmental problems, there is an increasing demand for functional materials with efficient oil absorption or oil-water separation capabilities. Therefore, in recent years, researchers have developed many super-wetting materials with selective wettability, which provide effective solutions for wastewater treatment or oil-water separation. Amon...

Claims

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Application Information

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IPC IPC(8): B05D5/00B05D3/10D06N3/00D06N3/12
CPCB05D3/10B05D5/00B05D7/58B05D2518/00D06N3/0036D06N3/12D06N2209/067D06N2213/03B05D2420/01B05D2420/02B05D2420/03
Inventor 彭珊王迎春
Owner HEBEI UNIVERSITY
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