Method for preparing corrosion-resistant super-hydrophobic copper mesh by virtue of spraying method

A technology of corrosion resistance and spraying method, applied in the direction of separation method, coating, anti-corrosion coating, etc., can solve the problems of poor corrosion resistance, acid and alkali resistance, etc., and achieve the effect of simple operation and good mechanical stability

Active Publication Date: 2017-06-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most separation materials have poor corrosion resistance, mainly due to the fact that the raw materials used are not resistant to acid and alkali, such as ZnO nanorods, nano-TiO 2 Materials such as PVDF and PVDF are easy to degrade in acidic environment, while nano-SiO 2 Easily soluble in alkaline environment

Method used

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  • Method for preparing corrosion-resistant super-hydrophobic copper mesh by virtue of spraying method
  • Method for preparing corrosion-resistant super-hydrophobic copper mesh by virtue of spraying method
  • Method for preparing corrosion-resistant super-hydrophobic copper mesh by virtue of spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Step 1: Preparation of Hydrophobic Waterborne Polyurethane

[0081] Under the protection of nitrogen, add 50 g of polymer polyol and 15 g of polyisocyanate into the reactor, stir evenly, add 0.3 g of dibutyltin dilaurate, and react at 85 ° C for 1 h; add 3 g of hydrophilic extender Chain agent, react at 85°C for 1.5 h; cool down to 40°C, add 10 g of acetone to reduce viscosity, then add 2.5 g of neutralizer, react at room temperature for 0.5 h; continue to add 4 g of amino silicone oil, 10 ℃ for 1 h to obtain a prepolymer containing hydrophobic side chains, and then disperse the prepolymer in deionized water under high-speed stirring to obtain a modified water-based polyurethane emulsion containing hydrophobic side groups; further reduce the acetone in the emulsion Remove by distillation.

[0082] Polymer polyol is polyethylene adipate diol; polyisocyanate is 4,4-dicyclohexylmethane diisocyanate; hydrophilic chain extender is dihydroxy half ester; neutralizing agent is...

Embodiment 2

[0096] Step 1: Preparation of Hydrophobic Waterborne Polyurethane

[0097] Under the protection of nitrogen, 60 g of polymer polyol and 20 g of polyisocyanate were added into the reactor, after stirring evenly, 0.2 g of dibutyltin dilaurate was added, and reacted at 80 °C for 1.5 h; Chain agent, react at 90 °C for 2 h; cool down to 50 °C, add 15 g of acetone to reduce viscosity, then add 4 g of neutralizer, react for 1 h at room temperature; continue to add 6 g of amino silicone oil, 20 ℃ for 0.7 h to obtain a prepolymer containing hydrophobic side chains, and then disperse the prepolymer in deionized water under high-speed stirring to obtain a modified water-based polyurethane emulsion containing hydrophobic side groups; further reduce the acetone in the emulsion Remove by distillation.

[0098] Polymer polyol is polyethylene adipate diol; polyisocyanate is 4,4-dicyclohexylmethane diisocyanate; hydrophilic chain extender is dihydroxy half ester; neutralizing agent is trietha...

Embodiment 3

[0112] Step 1: Preparation of Hydrophobic Waterborne Polyurethane

[0113] Under the protection of nitrogen, add 70 g of polymer polyol and 25 g of polyisocyanate into the reactor, stir well, add 0.3 g of dibutyltin dilaurate, and react at 85 ° C for 1.5 h; add 5 g of hydrophilic extender Chain agent, react at 90°C for 1.5 h; cool down to 60°C, add 15 g of acetone to reduce viscosity, then add 4.5 g of neutralizer, react at room temperature for 1 h; continue to add 8 g of amino silicone oil, 30 ℃ for 1 h to obtain a prepolymer containing hydrophobic side chains, and then disperse the prepolymer in deionized water under high-speed stirring to obtain a modified water-based polyurethane emulsion containing hydrophobic side groups; further reduce the acetone in the emulsion Remove by distillation.

[0114] Polymer polyol is polyethylene adipate diol; polyisocyanate is 4,4-dicyclohexylmethane diisocyanate; hydrophilic chain extender is dihydroxy half ester; neutralizing agent is t...

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Abstract

The invention relates to a method for preparing a corrosion-resistant super-hydrophobic copper mesh by virtue of a spraying method. An existing super-hydrophobic oil-water separation material has poor resistance to acid and alkali and loses oil-water separating capacity in various corrosive environments. The method comprises the following steps: taking polymer polyol and polyisocyanate, mixing, reacting, adding a hydrophilic chain-extending agent and dibutyltin dilaurate, reacting, then adding a neutralizing agent for neutralization, adding amino silicon oil to obtain a prepolymer containing a hydrophobic side chain, and dispersing into deionized water to obtain waterborne polyurethane emulsion containing a hydrophobic side group; and ultrasonically dispersing octadecylamine modified multiwall carbon nanotubes in acetone, adding the waterborne polyurethane emulsion containing the hydrophobic side group, so as to obtain a coating agent, spraying on the surface of a copper mesh, and drying, so that the corrosion-resistant super-hydrophobic copper mesh is obtained. The method provided by the invention has the advantages that the corrosion-resistant super-hydrophobic copper mesh can be resistant to acid, alkali and salt and can be respectively used in various corrosive environments; compared with the traditional two-step method synthesis process, the method provided by the invention is simple in operation; and silicon-containing waterborne polyurethane is taken as adhesive, so that the corrosion-resistant super-hydrophobic copper mesh has good mechanical stability.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a method for preparing corrosion-resistant superhydrophobic copper mesh by spraying. Background technique [0002] In recent years, with the increasing frequency of maritime shipping, global ecological disasters caused by leakage of crude oil and organic solvents have attracted widespread attention. Therefore, the development of materials that can recycle these organic pollutants can avoid economic loss and environmental tragedy. With the development of interface theory and bionics, separation materials based on superhydrophobic / superoleophilic have attracted great interest of researchers due to their advantages of high separation efficiency and thorough separation. The so-called superhydrophobic surface refers to the surface with water (pH=7 or so, 24°C) contact angle greater than 150° and rolling angle less than 10°. This new type of separation materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/08C09D7/12C08G18/66C08G18/65C08G18/42C08G18/61C08G18/10C02F1/40
CPCC02F1/40C02F2103/007C08G18/10C08G18/4238C08K7/24C08K9/02C08K9/04C08K2201/011C09D5/08C09D7/70C09D175/06C08G18/6511
Inventor 罗晓民曹敏冯见艳魏梦媛
Owner SHAANXI UNIV OF SCI & TECH
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