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Titanium dioxide/polymer composite dielectric hydrophobic material and preparation method

A technology of titanium dioxide and hydrophobic materials, applied in the direction of coating, etc., can solve the problems of limited application and low dielectric constant, and achieve the effects of low glass transition temperature, increased dielectric constant, and excellent surface hydrophobicity

Active Publication Date: 2019-08-23
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dielectric constant of pure PDMS material is low (less than 3), which limits its application in dielectric wetted devices, microfluidic chips and other fields.

Method used

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  • Titanium dioxide/polymer composite dielectric hydrophobic material and preparation method
  • Titanium dioxide/polymer composite dielectric hydrophobic material and preparation method
  • Titanium dioxide/polymer composite dielectric hydrophobic material and preparation method

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Experimental program
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Effect test

Embodiment 1-6

[0022] (1) 2.5 grams of titanium dioxide, 12.5 milliliters of absolute ethanol, 12.5 milliliters of absolute ethylene glycol, and 100 milliliters of concentration of 10 mol / liter sodium hydroxide are placed in a 200 milliliter hydrothermal reaction kettle, stirred for 10 minutes, and ultrasonically treated for 10 minutes minutes, and stir for another 10 minutes. Then the reaction kettle was put into a blast drying oven to react at a constant temperature of 180°C for 48 hours;

[0023] (2) After the reaction is over, take out the precipitate, soak it with 37wt% concentrated hydrochloric acid for 6 hours, wash the soaked precipitate with deionized water several times, and move it to a 60°C oven for drying to obtain the precursor H 2 Ti 3 o 7 ;

[0024] (3) The precursor H 2 Ti 3 o 7 Burning in the air for 2 hours, the burning temperature is 600°C, and the heating rate is 5°C / min, to obtain white relatively fluffy titanium dioxide powder (its microstructure is linear, such ...

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Abstract

The invention relates to a nanometer composite material technology and aims to provide a titanium dioxide / polymer composite dielectric hydrophobic material and a preparation method thereof. The dielectric hydrophobic material is prepared by taking polydimethylsiloxane as a polymer matrix and taking titanium dioxide nanowire as a filling material through a blending and spin-coating process, whereinthe filling material accounts for 5 to 30 percent of the total mass of the dielectric hydrophobic material. In the titanium dioxide nanowire prepared by a hydrothermal method, the diameter is about 100 nanometers and the length is about 8 microns. A composite film with uniformly dispersed titanium dioxide can be prepared by applying the titanium dioxide nanowire to a solution blending and spin-coating process. The titanium dioxide nanowire with high length-to-diameter ratio can increase the interaction area of the inorganic filler / polymer interface, the interfacial polarization effect is enhanced, the dielectric constant of the composite material is increased, and low dielectric loss and excellent surface hydrophobic performance are maintained. The preparation process is simple and the method is high in operability and high in repeatability.

Description

technical field [0001] The invention relates to a titanium dioxide / polymer composite dielectric hydrophobic material and a preparation method thereof, belonging to the technical field of nanocomposite materials. Background technique [0002] As a new actuation technology that uses voltage to regulate conductive droplets, electrowetting has a wide range of regulation, sensitive response and reusability. widely used. Dielectric wetting devices generally consist of four parts—substrate, electrodes, dielectric layer, and conductive droplets. Among them, the dielectric layer has a great influence on the required driving voltage and manufacturing process. It can greatly eliminate the occurrence of electrolysis, and at the same time increase the control range of voltage on conductive droplets, which greatly promotes electrowetting in various fields. field applications. Generally, the electrowetting device driving voltage is inversely proportional to the dielectric constant of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D7/61C03C17/42
Inventor 张启龙陈佳云朱志才杨辉
Owner ZHEJIANG UNIV
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