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Gradient function coating with surface tension changed in gradient way and preparation method thereof

A gradient function and surface tension technology, applied in the direction of coating, etc., can solve the problems of complex preparation process and process of gradient copolymer, application performance not particularly meeting the requirements, loss of gradient function, etc., to reduce synthesis cost, low cost and environmental protection friendly effect

Inactive Publication Date: 2013-07-17
ZHONGSHAN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process and process of the gradient copolymer are complicated and difficult to control, not only the cost is relatively high, but also the relevant application performance is not particularly satisfactory, especially the coating made of this copolymer as a resin basically loses the gradient function

Method used

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  • Gradient function coating with surface tension changed in gradient way and preparation method thereof
  • Gradient function coating with surface tension changed in gradient way and preparation method thereof
  • Gradient function coating with surface tension changed in gradient way and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A gradient functional coating with gradient surface tension changes, obtained according to the following steps:

[0040] (1) Synthesis of gradient copolymers by batch feeding ATRP method

[0041] (I) Synthetic formula:

[0042] Styrene: 16.6g

[0043] Methyl methacrylate (MMA): 19.0g

[0044] tert-butyl α-bromoisobutyrate (t-BBiB, initiator): 0.71 g

[0045] CuCl / N,N,N′,N″,N″-pentamethyldivinyltriamine (CuCl / PMDETA, catalyst): 0.32g+1.66g

[0046] Tetrahydrofuran (THF): 600g

[0047] NaOH (35wt%): 60g

[0048] Concentrated hydrochloric acid: 100mL

[0049] Butanone: 20g

[0050] (Ⅱ) Synthesis process:

[0051] Add styrene, MMA, t-BBiB and CuCl / PMDETA into a completely dry round-bottomed flask, vacuumize and fill with nitrogen for 3 times, then turn on the magnetic stirring, keep the water bath at 80°C for 5h, then cool to room temperature, add 1 / 2THF dissolves the copolymer. Add NaOH solution, reflux at 85°C for 36h, drop methanol to completely precipitate th...

Embodiment 2

[0094] (1) Gradient copolymers were synthesized by semi-batch feeding ATRP method

[0095] Add 0.16mol styrene, 3.2mmolt-BBiB and 9.6mmol CuCl / PMDETA (molar ratio 1:3) into a completely dry round bottom flask, vacuumize and fill with nitrogen for 3 times, then turn on the magnetic stirring, and keep the temperature in the water bath to 80 ℃. Then slowly drop into 0.19molMMA, dropwise time is 1h, then keep warm for 5h, then cool to room temperature, add 300gTHF to dissolve the copolymer. Add 60g of 35wt% NaOH solution, reflux at 85°C for 36h, add methanol dropwise to completely precipitate the copolymer, filter and dry at 60°C, dissolve the product in 300gTHF, add 100mL of concentrated hydrochloric acid, let stand at room temperature for 4h, then pour into 3L of deionized water , fully stirred to completely precipitate the copolymer. The precipitate was washed with water several times until neutral, and dried at 60°C to obtain an amphiphilic block gradient copolymer (see Tabl...

Embodiment 3

[0121] (1) Gradient copolymer was synthesized by semi-batch feeding ATRP method (synthetic formula and process parameters are the same as in Example 2)

[0122] (2) Preparation of hydrophilic resin and hydrophobic resin by free radical polymerization (synthetic formula and process parameters are the same as in Example 1).

[0123] (3) Preparation and coating of gradient functional coatings

[0124] (I) Gradient functional coating formula:

[0125] Gradient copolymer solution: 12.2g

[0126] Hydrophilic resin solution: 43.5g

[0127] Hydrophobic resin solution: 22.5g

[0128] Titanium dioxide: 6g

[0129] Cyclohexanone: 4g

[0130] Butanol: 4g

[0131] Ethylene glycol monoethyl ether: 6g

[0132] Silicone wetting and dispersing agent: 2g

[0133] Polyether defoamer DF104: 0.5g

[0134] (Ⅱ) Preparation process:

[0135] Mix the raw materials of the above formula in turn, stir vigorously at high speed for about 2 hours, then grind for 2 hours with a sand mill, and then ...

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Abstract

The invention discloses a gradient function coating with surface tension changed in a gradient way, and the gradient function coating comprises the following components in percentage by weight: 5%-20% of polystyrene-b-polymethacrylic acid amphiphilic block polymers, 5%-35% of hydrophobic resin, 5%-40% of hydrophilic resin, 30%-80% of solvents, 0%-8% of pigment fillers and 0%-5% of auxiliary agents. The invention also discloses a preparation method of the gradient function coating. The gradient function coating with the surface tension changed in the gradient way, which is disclosed by the invention, is prepared under the condition that a synthetic process is simplified and the synthetic cost is reduced as far as possible by synthesizing a gradient copolymer, the hydrophilic resin and the hydrophobic resin and reasonably proportioning various coating components.

Description

technical field [0001] The invention relates to the field of gradient functional materials, in particular to a gradient functional coating with a gradient change in surface tension and a preparation method thereof. Finned heat exchangers and other industries. Background technique [0002] Gradient surface functional materials refer to special functional materials that can make some physical or chemical properties of the surface of the substrate to be treated change gradiently with the change of the surface position of the substrate, and the gradient functional coatings with gradient surface tension changes are It refers to the special functional coating that can make the surface tension of the surface of the substrate to be coated change gradiently with the change of the position of the substrate surface. For the surface of a certain solid material, the wettability of a certain liquid to it is characterized by the size of the surface tension (generally measured by the conta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/10C09D185/00C09D133/12C09D5/00C08F220/14C08F212/08C08F8/00C08F220/06C08F220/24C08G77/442C08G79/00
Inventor 冷小冰周勤玲潘澍之
Owner ZHONGSHAN POLYTECHNIC
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