Method for preparing coating on surface of hydrophobic insulating layer

A technology of hydrophobic insulating layer and coating film, which is applied to the device for coating liquid on the surface, special surface, pre-treated surface, etc., which can solve the problems that the coating is difficult to form a coating film, difficult to hydrophobic, low hydrophobic insulating layer, etc. , to achieve the effects of strong promotion, low cost and strong applicability

Inactive Publication Date: 2015-09-16
SOUTH CHINA NORMAL UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But precisely because of the hydrophobic properties of the surface of the hydrophobic insulating layer, when we need to carry out processes such as coating on its surface, due to the low surface energy of the hydrophobic insulating layer, it is difficult for coatings with higher surface energy to form a coating on its surface
[0003] The traditional method is to modify the surface of the hydrophobic insulating layer, such as oxygen plasma or ultraviolet ozone, etc. to treat the surface of the hydrophobic insulating layer to make it hydrophilic and coatable, and finally restore it to hydrophobic by high-temperature thermal reflux. , but these methods have modified the surface, which has a certain impact on the surface of the material, and it is difficult to ensure that the hydrophobic properties of the surface can be completely restored, thus affecting the superior hydrophobic properties of the material itself, which limits its application.

Method used

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  • Method for preparing coating on surface of hydrophobic insulating layer
  • Method for preparing coating on surface of hydrophobic insulating layer
  • Method for preparing coating on surface of hydrophobic insulating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Prepare the hydrophobic insulating layer 3.

[0053] First, ultrasonically clean the ITO glass substrate, then drop hydrophobic coating on it, adjust the rotation speed to 1500 r / min, and spin coat to obtain the hydrophobic insulating layer 3, and then put the sample on a hot plate for baking at 95 °C. The time is 5 minutes, and then the sample is placed in an oven from room temperature to 180° C. for 30 minutes. The thickness of the obtained hydrophobic insulating layer 3 is about 800 nm, and the contact angle is about 110°.

[0054] 2) Add film paint 4 on the hydrophobic insulating layer 3 .

[0055] Configure film coating 4, the photoresist SU-8 2000.5 itself is conductive, so it can be directly coated, and its conductivity is measured to be 4.7 μS / cm at a temperature of 22±1°C; then use a pipette to pipette Take 5 μL and drop it on the surface of the hydrophobic insulating layer 3 obtained in step 1.

[0056] 3) Perform electrowetting treatment

[0057] In thi...

Embodiment 2

[0062] 1) Prepare the hydrophobic insulating layer 3.

[0063] First, ultrasonically clean the ITO glass substrate, then drop hydrophobic coating on it, adjust the rotation speed to 1500 r / min, and spin coat to obtain the hydrophobic insulating layer 3, and then put the sample on a hot plate for baking at 95 °C. The time is 5 minutes, and then the sample is placed in an oven from room temperature to 180° C. for 30 minutes. The thickness of the obtained hydrophobic insulating layer 3 is about 800 nm, and the contact angle is about 110°.

[0064] 2) Add film paint 4 on the hydrophobic insulating layer 3 .

[0065] Configure two-component coating film 4 with different conductivity, photoresist SU-8 3005 and ionic liquid [BMIM] BF 4 Mix according to different mass ratios of 20:1, 10:1, and 5:1 to obtain two different coating film coatings 4, and measure the corresponding electrical conductivity under the environment of 22±1°C. 32.3 μS / cm, 56.4 μS / cm, 113.8 μS / cm; then use a pipe...

Embodiment 3

[0074] 1) Prepare the hydrophobic insulating layer 3.

[0075] First, ultrasonically clean the ITO glass substrate, then drop hydrophobic paint on it, adjust the rotation speed to 1500r / min, spin coat to obtain a hydrophobic insulating layer 3, and then put the sample on a hot plate for baking at a temperature of 95°C for a period of time After 5 minutes, the sample was placed in an oven from room temperature to 180°C for 30 minutes. The resulting hydrophobic insulating layer 3 had a thickness of about 800 nm and a contact angle of about 110°.

[0076] 2) Add film paint 4 on the hydrophobic insulating layer 3 .

[0077] Configure the film coating 4 with three components mixed, the photoresist SU-8 3050 and the ionic liquid [BMIM] BF 4 、[BMIM] PF 6 Mix according to the mass ratio of 10:1:1 to obtain three-component film paint 4, and measure its conductivity at 22±1°C to obtain a conductivity of 97.4 μS / cm; then use a pipette to pipette 5 μL was dropped onto the surface of th...

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Abstract

The invention discloses a method for preparing a coating on the surface of a hydrophobic insulating layer. The method includes the following steps that the hydrophobic insulating layer is prepared on a base material; coating paint is added to the hydrophobic insulating layer; electrowetting processing is conducted, that is, proper voltage is applied on the position between the base material and the coating paint, the electrowetting effect is utilized, and the surface of the hydrophobic insulating layer becomes wettable; coating is conducted. The method can be used for preparing coatings on the surface of various hydrophobic insulating layers, such as, electrowetting display, micro-fluidic chips, electrowetting sensing, electrowetting micro lens and electrowetting micro electro mechanical system and the application range of hydrophobic insulating materials can be greatly expanded.

Description

technical field [0001] The invention relates to a method for preparing a coating film on the surface of a hydrophobic insulating layer. Background technique [0002] Hydrophobic insulating materials are widely used in the field of optoelectronic devices, such as electrowetting display devices, microfluidic chips, etc. The hydrophobic insulating material itself has good hydrophobic and insulating properties, so the hydrophobic insulating layer prepared from the hydrophobic insulating material can exert the inherent characteristics of its surface. But precisely because of the hydrophobic properties of the surface of the hydrophobic insulating layer, when we need to carry out processes such as coating on its surface, due to the low surface energy of the hydrophobic insulating layer, it is difficult for coatings with higher surface energy to form a coating on its surface . [0003] The traditional method is to modify the surface of the hydrophobic insulating layer, such as oxy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/14B05D5/00C09D5/24
Inventor 水玲玲韦必明窦盈莹金名亮周国富
Owner SOUTH CHINA NORMAL UNIVERSITY
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