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Preparation method for bionic super-hydrophobic film taking copper foam as substrate and application thereof

A copper foam, super-hydrophobic technology, applied in the field of composite materials, can solve the problems of difficulty in obtaining super-hydrophobicity and super-lipophilicity, secondary pollution of fluorine-containing materials, poor mechanical properties of polymers, etc., and achieve oil-water separation efficiency and oil-water separation efficiency. Improve and improve the effect of surface properties

Active Publication Date: 2017-12-22
JIANGSU SAFELY ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with the publication number CN104906828A reports that a hydrophobic material such as perfluorodecanethiol is embedded in a metal foam method to prepare a surface-hydrophobic foam separation membrane. Achieve super-hydrophobic super-oleophilic, and high oil-water separation efficiency, and fluorine-containing materials may cause secondary pollution to the environment
The patent with the publication number CN102698471A reports that polylactic acid is used to prepare a porous membrane first and then surface-modify the surface to obtain a degradable oil-water separation membrane. Although this material has a strong hydrophobic property, it is due to the relatively poor mechanical properties of the polymer itself. Poor reasons, resulting in the deformation of the material with the increase of pressure reduces the oil-water separation efficiency, limiting its practical application

Method used

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  • Preparation method for bionic super-hydrophobic film taking copper foam as substrate and application thereof
  • Preparation method for bionic super-hydrophobic film taking copper foam as substrate and application thereof
  • Preparation method for bionic super-hydrophobic film taking copper foam as substrate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a biomimetic superhydrophobic membrane based on copper foam, comprising the steps of:

[0031] a) Pretreatment of copper foam: Cut the copper foam with a thickness of 1.6 mm into blocks with a length and width of 40 mm and 20 mm respectively, ultrasonically clean it with 1 mol / L HCl solution for 10 min, and then wash it with deionized water and ethanol Wash for 3 minutes each to remove oxides and impurities on the copper foam surface.

[0032] b) Surface structure design: At room temperature, the copper foam obtained in a) was soaked in 2.5 ml of (NH 4 ) 2 S 2 o 8 (0.1 mol / L) and 2.5 ml of NaH 2 PO 4 (0.5 mol / L) aqueous solution for 6 h, removed, rinsed with deionized water three times, and vacuum dried at 40 °C for 3 h to obtain copper foams with hierarchical structure on the surface.

[0033]c) Surface chemical modification: Add 1 mL of γ-glycidyloxypropyltrimethoxysilane solution (KH-560) and 0.25 mL of deionized water to the bottom of ...

Embodiment 2

[0036] A preparation method of a biomimetic superhydrophobic membrane based on copper foam, comprising the steps of:

[0037] a) Pretreatment of copper foam: Cut the copper foam with a thickness of 1.6 mm into blocks with a length and width of 40 mm and 20 mm respectively, ultrasonically clean it with 2 mol / L HCl solution for 10 min, and then wash it with deionized water and ethanol Wash for 3 minutes each to remove oxides and impurities on the copper foam surface.

[0038] b) Surface structure design: At room temperature, the copper foam obtained in a) was soaked in 3 ml of (NH 4 ) 2 S 2 o 8 (0.2 mol / L) and 3 ml of K 2 HPO 4 (0.6 mol / L) aqueous solution for 10 h, taken out, rinsed with deionized water three times, and dried in vacuum at 40 °C for 3 h to obtain copper foams with hierarchical structure on the surface.

[0039] c) Surface chemical modification: Add 3 mL of γ-aminopropyltriethoxysilane solution (KH-550) and 0.75 mL of deionized water to the bottom of the r...

Embodiment 3

[0042] A preparation method of a biomimetic superhydrophobic membrane based on copper foam, comprising the steps of:

[0043] a) Pretreatment of copper foam: cut the copper foam with a thickness of 1.6 mm into blocks with a length and width of 40 mm and 20 mm respectively, ultrasonically clean it with 3 mol / L HCl solution for 10 min, and then wash it with deionized water and ethanol Wash for 3 minutes each to remove oxides and impurities on the copper foam surface.

[0044] b) Surface structure design: at room temperature, soak the copper foam obtained in a) in 5 ml of (NH 4 ) 2 S 2 o 8 (0.3 mol / L) and 5 ml of Na 2 HPO 4 (0.8 mol / L) aqueous solution for 12 h, taken out, rinsed with deionized water three times, and dried in vacuum at 40 °C for 3 h to obtain copper foams with hierarchical structure on the surface.

[0045] c) Surface chemical modification: 2 mL of γ-propyltrimethoxysilane solution (KH-570) and 0.5 mL of deionized water were added to the bottom of the reac...

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Abstract

The invention belongs to the field of a composite material, relates to a copper foam film material and especially relates to a preparation method for a bionic super-hydrophobic film taking copper foam as a substrate and an application thereof. The method comprises the following steps: firstly, pre-treating the copper foam and removing surface impurities; soaking in an aqueous solution containing ammonium persulfate and phosphate, thereby forming a hierarchy structure on the surface thereof; modifying the surface with the hot steam of silane coupling agent aqueous solution, thereby acquiring the bionic super-hydrophobic film taking the copper foam as the substrate. The prepared hydrophobic film is subjected to bionic in-situ growth and chemical steam modification on the copper foam surface; the papillary micro-nano scale dual roughness is formed by the nanosheet on the surface; the prepared hydrophobic film can be used for separating oil from water; the acquired super-hydrophobic film inherits the advantages of developed pore structure, excellent mechanical properties, stable surface rough structure and hydrophobic property, high reusability and high operability of the copper foam; the soil-water separation efficiency is obviously increased; the continuous efficient soil-water separation is realized; the bionic super-hydrophobic film is an oil-water separating material with prospects.

Description

technical field [0001] The invention belongs to the field of composite materials and relates to a copper foam film material, in particular to a preparation method and application of a bionic superhydrophobic film based on copper foam. Background technique [0002] In recent years, oil spill accidents have occurred frequently around the world. Oil spills caused by oil pipeline bursts, oil well ruptures, and oil tankers sinking and overturning have caused serious damage to water ecosystems. The mass death of aquatic organisms and the destruction of the biological chain have brought huge damage to the coastal environment and caused huge economic losses. Therefore, the development of an efficient oil-water separation technology has attracted widespread attention at home and abroad. Traditional oil-water separation technologies include chemical dispersion, oil skimmer treatment, combustion, and heating oil-water separation. Secondary pollution limits the popularization and appl...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D69/10B01D67/00B01D17/02C02F1/40
CPCB01D17/085B01D67/0093B01D69/02B01D69/105B01D2325/24B01D2325/30B01D2325/38C02F1/40
Inventor 邱凤仙荣坚张涛郭卿朱瑶杨冬亚徐吉成
Owner JIANGSU SAFELY ENVIRONMENT ENG
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