Preparation method for composite material high-adhesiveness super-hydrophobic film

A composite material and high-adhesion technology, applied in the direction of coating, etc., to achieve the effect of easy industrialization, good repeatability, and improved interface bonding strength

Inactive Publication Date: 2013-04-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the use of multi-walled carbon nanotubes for the preparation of highly adhesive superhydrophobic films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of nano-silica

[0032] Add 10g of ammonia water to 200g of absolute ethanol, stir for 20 minutes to mix evenly, slowly add 6g of tetraethyl orthosilicate dropwise with a constant pressure separating funnel, stir and react at 60°C for 6 hours, wash with alcohol and centrifuge three times, and finally 50 ℃ drying for 12 hours, grinding to obtain nano silicon dioxide.

[0033] 2. Preparation of amino-modified nano-silica

[0034] Weigh 1g of the above-prepared nano-silica and place it in 50g of toluene, ultrasonically disperse for 20 minutes, quickly add 2g of 3-aminopropyltriethoxysilane, react at 40°C for 5 hours, wash and centrifuge three times with alcohol, and finally Dry at 50°C for 12 hours and grind to obtain amino-modified nano-silica.

[0035] 3. Preparation of Acyl Chloride Multi-walled Carbon Nanotubes

[0036] Put 0.2g of multi-walled carbon nanotubes, 50g of thionyl chloride, and 0.15g of N,N-dimethylformamide into a single-necked flask, ul...

Embodiment 2

[0042] 1. Preparation of nano-silica

[0043] Add 7.5g of ammonia water to 150g of absolute ethanol, stir for 20 minutes to mix evenly, slowly add 4.5g of tetraethyl orthosilicate dropwise with a constant pressure separatory funnel, stir and react at 60°C for 6 hours, wash with alcohol and centrifuge three times, Finally, dry at 50° C. for 12 hours, and grind to obtain nano silicon dioxide.

[0044] 2. Preparation of amino-modified nano-silica

[0045] Weigh 0.05g of the above-prepared nano-silica and place it in 25g of toluene, ultrasonically disperse for 20 minutes, quickly add 1g of 3-aminopropyltriethoxysilane, react at 50°C for 4 hours, wash and centrifuge three times with alcohol, Dry at 50°C for 12 hours and grind to obtain amino-modified nano-silica.

[0046] 3. Preparation of Acyl Chloride Multi-walled Carbon Nanotubes

[0047] Put 0.025g of multi-walled carbon nanotubes, 7.5g of thionyl chloride, and 0.0125g of N,N-dimethylformamide into a single-necked flask, and...

Embodiment 3

[0053] 1. Preparation of nano-silica

[0054] Add 5g of ammonia water to 100g of absolute ethanol, stir for 20 minutes to make it evenly mixed. Slowly add 3 g of ethyl orthosilicate dropwise with a constant pressure separatory funnel, stir and react at 60°C for 8 hours, wash with alcohol and centrifuge three times, finally dry at 50°C for 12 hours, and grind to obtain nano-silica.

[0055] 2. Preparation of amino-modified nano-silica

[0056] Weigh 0.5g of the above-prepared nano-silica and place it in 30g of toluene, ultrasonically disperse for 20 minutes, quickly add 1g of 3-aminopropyltriethoxysilane, react at 40°C for 12 hours, wash and centrifuge three times with alcohol, Finally, dry at 50° C. for 12 hours, and grind to obtain amino-modified nano-silica.

[0057] 3. Preparation of Acyl Chloride Multi-walled Carbon Nanotubes

[0058] Put 0.1g of multi-walled carbon nanotubes, 25g of thionyl chloride, and 0.075g of N,N-dimethylformamide into a single-necked flask, and r...

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PUM

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Abstract

The invention discloses a preparation method for a composite material high-adhesiveness super-hydrophobic film. Firstly, tetraethoxysilane is added in mixed liquid of catalyst and alcohol solvent for reacting to obtain nanosilicon dioxide; then, the nanosilicon dioxide is added in benzene solvent, and is added with silane coupling agent containing amino to prepare amino-modified nanosilicon dioide; multiwalled carbon nanotube, thionyl chloride and N, N-dimethylformamide are put in a single-opening flask for countercurrent reacting to prepare multiwalled carbon nanotube after acylating chlorination; and finally, the amino-modified nanosilicon dioide, the multiwalled carbon nanotube after the acylating chlorination and the stearic acid are added in the benzene solvent for countercurrent reacting to prepare a stearic acid-grafted multiwalled carbon nanotube/nanosilicon dioxide composite material; after the composite material is ultrasonically dispersed, an inorganic or organic material is adopted as substrate to prepare the composite material high-adhesiveness super-hydrophobic film through the coating method. The method has the advantages of simple preparation process, good repeatability, low cost and convenience for promotion and application.

Description

technical field [0001] The invention relates to the technical field of application of organic-inorganic composite materials, in particular to a method for preparing an organic-inorganic nanocomposite high-adhesive superhydrophobic film, which belongs to the technical field of surface chemistry. Background technique [0002] Global biological systems can be divided into two categories according to surface properties and interactions: The first category is low-adhesion systems, which possess minimal adhesion and wettability. The self-cleaning lotus leaf is a typical example. Based on this discovery, the researchers prepared a biomimetic superhydrophobic surface. The second category is highly adhesive systems, where the surface has high adhesion and friction. Due to the existence of surface adhesion, when the contact angle between a water droplet and a highly adhesive superhydrophobic surface is greater than 150°, even if the surface is tilted by 90° or even 180°, the water dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00
Inventor 刘伟良刘金秋柏冲姚金水
Owner QILU UNIV OF TECH
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