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

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...

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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.

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