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High-dielectric-constant full-organic composite hydrophobic material and preparation method thereof

A high dielectric constant, hydrophobic material technology, applied in the field of nanocomposites, can solve the problem of low hydrophobic characteristics, achieve the effect of increasing the dielectric constant, high operability, and enhancing the interface polarization effect

Inactive Publication Date: 2019-05-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrophobicity is lower than other organic materials, generally around 100°

Method used

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  • High-dielectric-constant full-organic composite hydrophobic material and preparation method thereof
  • High-dielectric-constant full-organic composite hydrophobic material and preparation method thereof
  • High-dielectric-constant full-organic composite hydrophobic material and preparation method thereof

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Embodiment 1-8

[0025] (1) Add 1.5 g of polyvinylpyrrolidone (PVP) and 100 mL of deionized water into a three-necked flask for mechanical stirring. Secondly, under the condition of continuously injecting nitrogen, 10 g of styrene (C 8 h 8 ) into a three-necked flask placed in a water bath at 70°C. Then, 0.25 g of 2,2-azobis(2-methylpropylimidium) dihydrochloride (AIBA) was added to the reaction apparatus and kept stirring for 24 hours. Finally, polystyrene microspheres (PS microspheres, with a particle size of about 251 nm, such as figure 1 shown).

[0026] (2) Dissolve poly(vinylidene fluoride-trifluoroethylene) powder (P(VDF-TrFE)) and PS microspheres in DMF (N,N-dimethylformamide) at a solute-solvent mass ratio of 1:10 And stir evenly to obtain solution A. Dissolve PDMS (polydimethylsiloxane) in isopropanol at a mass ratio of solute to solvent of 1:5 and stir evenly to obtain solution B.

[0027] (3) Take solution A and solution B according to the mass ratio of poly(vinylidene fluori...

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Abstract

The invention relates to the technical field of nano-compositing, and aims to provide a high-dielectric-constant full-organic composite hydrophobic material and a preparation method thereof. The high-dielectric-constant full-organic composite hydrophobic material is prepared in the mode that polydimethylsiloxane and poly (vinylidene fluoride-trifluoroethylene) which serve as a matrix and polystyrene microspheres serving as a filling material are blended and spin-coated; and in the matrix, the mass ratio of the polydimethylsiloxane to the poly (vinylidene fluoride-trifluoroethylene) is 2 to 3,and the filling material accounts for 5-30 wt% of the total mass of the full-organic composite hydrophobic material. The interfacial polarization effect can be enhanced by adding the nano polystyrenemicrospheres into the polymer matrix, the micro-rough surface is constructed, the dielectric constant of a composite is increased, and the excellent hydrophobic performance is kept. The preparation technology is simple, and operability and repeatability of the method are high. By adjusting the adding content of PS, dielectric performance, hydrophobic performance and the like of the composite can be adjusted and controlled, and meanwhile, the flexibility performance is good due to pure organic matter compounding.

Description

technical field [0001] The invention relates to a high dielectric constant all-organic composite hydrophobic material and a preparation method thereof, belonging to the technical field of nanocomposite. Background technique [0002] As a new actuation technology that uses voltage to control conductive droplets, electrowetting has the characteristics of wide control range, sensitive response and reusability. It is widely used in various microfluidic chips, display components and variable focus liquid lenses. has wide application. Dielectric wetting devices usually consist of four parts: substrate, electrodes, dielectric layer, and conductive droplets. Among them, the dielectric layer has a great influence on the driving voltage of the electrowetting device and the manufacturing process. It can greatly eliminate the occurrence of electrolysis, and at the same time increase the control range of the voltage on the conductive droplet, which greatly promotes the electrowetting in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L83/04C08L25/06C08J5/18
Inventor 张启龙朱志才杨辉王浩
Owner ZHEJIANG UNIV
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