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A wear-resistant superhydrophobic self-cleaning composite coating and preparation method thereof

A composite coating and super-hydrophobic technology, which is applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor wear resistance and difficult to last super-hydrophobic function, and achieve improved wear resistance, super-hydrophobic performance, and applicable wide range of effects

Active Publication Date: 2021-12-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a wear-resistant super-hydrophobic self-cleaning composite coating and its preparation method, which solves the problem that the super-hydrophobic function is difficult to last due to the poor wear resistance of the current self-cleaning super-hydrophobic coating The problem

Method used

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  • A wear-resistant superhydrophobic self-cleaning composite coating and preparation method thereof
  • A wear-resistant superhydrophobic self-cleaning composite coating and preparation method thereof

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preparation example Construction

[0029] Such as figure 1 As shown, the invention discloses a method for preparing a wear-resistant superhydrophobic self-cleaning composite coating, which specifically includes the following steps:

[0030] 1)MPS-NH 2 Preparation of @PDMS composite particles

[0031] Weigh 0.1-1 part of silane coupling agent, 0.1-2 parts of deionized water and 1-20 parts of absolute ethanol, mix and stir, hydrolyze for 10-30 minutes and set aside. Then, weigh 5-60 parts of n-butanol and 1-5 parts of macroporous silicon (MPS), mix and stir, and after the MPS is completely infiltrated, sonicate for 15-30 minutes to prepare the MPS dispersion. Add the MPS dispersion into a round-bottomed flask, heat and stir at 90-100°C, and slowly add the prepared coupling agent hydrolyzate dropwise after the temperature stabilizes to react for 3-6 hours. Then, centrifuge and wash with absolute ethanol, and then vacuum-dry to obtain aminated macroporous silicon (MPS-NH 2 ). Aminated macroporous silicon (MPS-...

Embodiment 1

[0047] 1)MPS-NH 2 Preparation of @PDMS composite particles

[0048] Weigh 0.1 part of KH-550 silane coupling agent, 0.1 part of deionized water and 1 part of absolute ethanol, mix and stir, hydrolyze for 10-30 minutes and set aside. Then, weigh 5 parts of n-butanol and 1 part of macroporous silicon (MPS), mix and stir, and after the MPS is completely infiltrated, sonicate for 15 minutes to prepare the MPS dispersion. Add the MPS dispersion into a round-bottomed flask, heat and stir at 90°C, and slowly add the prepared coupling agent hydrolyzate dropwise after the temperature stabilizes to react for 3 hours. Then, centrifuge and wash with absolute ethanol, and then vacuum-dry to obtain aminated macroporous silicon (MPS-NH 2 ). 1 part of aminated macroporous silicon (MPS-NH 2 ) was mixed with 40 parts of polydimethylsiloxane (PDMS), and vacuumized at 60°C for 6 hours to make PDMS completely enter MPS-NH 2 In the channel, MPS-NH 2 @PDMS composite particles.

[0049] 2)WPU / ...

Embodiment 2

[0055] 1)MPS-NH 2 Preparation of @PDMS composite particles

[0056] Weigh 1 part of KH-560 silane coupling agent, 2 parts of deionized water and 20 parts of absolute ethanol, mix and stir, hydrolyze for 30 minutes and set aside. Then, 60 parts of n-butanol and 5 parts of macroporous silicon (MPS) were weighed, mixed and stirred, and MPS dispersion liquid was prepared by ultrasonication for 30 minutes after the MPS was completely infiltrated. Add the MPS dispersion into a round-bottomed flask, heat and stir at 100°C, and slowly add the prepared coupling agent hydrolyzate dropwise after the temperature stabilizes to react for 6 hours. Then, centrifuge and wash with absolute ethanol, and then vacuum-dry to obtain aminated macroporous silicon (MPS-NH 2 ). 10 parts of aminated macroporous silicon (MPS-NH 2 ) was mixed with 300 parts of polydimethylsiloxane (PDMS), and vacuumized at 100°C for 12 hours, so that PDMS completely entered into MPS-NH 2 In the channel, MPS-NH 2 @PDM...

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Abstract

The invention discloses a wear-resistant superhydrophobic self-cleaning composite coating and a preparation method thereof, comprising the following steps: aminated macroporous silicon MPS‑NH 2 Mixed with polydimethylsiloxane PDMS and vacuumized to obtain MPS‑NH 2 @PDMS Composite Particles; After mixing diol and PDMS, add diisocyanate and dibutyltin dilaurate to react, add chain extender, react at 60-80°C for 1-3 hours, add MPS‑NH 2 @PDMS composite particles, then add triethylamine and react at 40-60°C for 1-3 hours, then perform phase transfer emulsification with stirring to obtain WPU / MPS‑NH 2 @PDMS composite emulsion; combine WPU / MPS‑NH 2 @PDMS composite emulsion is sprayed on the surface of the base layer and then dried to obtain WPU / MPS‑NH 2 @PDMS composite coating. The preparation method of the present invention is simple, and the prepared wear-resistant superhydrophobic self-cleaning composite coating has the characteristics of excellent mechanical properties, high wear resistance, and high superhydrophobic self-cleaning efficiency, and can be applied to various wear-resistant superhydrophobic self-cleaning coatings coating.

Description

technical field [0001] The invention belongs to the technical field of coating preparation, in particular to a wear-resistant superhydrophobic self-cleaning composite coating and a preparation method thereof. Background technique [0002] Superhydrophobic coating refers to a new type of coating whose surface static water contact angle is greater than 150° and rolling contact angle is less than 10°. It can be widely used in environmental protection, chemical industry, energy and other fields. It is one of the research hotspots in the field of material surface. Currently, superhydrophobic surfaces can be prepared by two methods. The first is to construct a rough surface. However, the polymer coating with a rough surface prepared with inorganic nanoparticles as rough structural units usually has the problem of poor compatibility between the nanoparticles and the resin matrix, resulting in weak interfacial interaction between the two. , which in turn affects its wear resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D175/06C09D7/62C09D7/65
CPCC09D175/08C09D175/06C09D7/62C09D7/65C08K2201/011C08L83/04C08K9/06C08K7/26
Inventor 刘超刘建宁李茜殷青鲍艳马建中赵舜华吕斌
Owner SHAANXI UNIV OF SCI & TECH
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