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Preparation method of magnesium oxide/polystyrene composite dielectric material

A technology of polystyrene and dielectric materials, applied in the direction of magnesium oxide, etc., can solve the problems of low dielectric constant and limited application, and achieve the effects of improved dielectric properties, low filling volume, and improved comprehensive dielectric properties

Active Publication Date: 2017-10-13
ZHEJIANG UNIV
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  • Description
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  • Application Information

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Problems solved by technology

However, the low dielectric constant of polystyrene greatly limits its application in dielectric fields such as capacitance, energy storage, and electrowetting.

Method used

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  • Preparation method of magnesium oxide/polystyrene composite dielectric material
  • Preparation method of magnesium oxide/polystyrene composite dielectric material
  • Preparation method of magnesium oxide/polystyrene composite dielectric material

Examples

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Embodiment 1-8

[0032] (1) In the three-necked flask filled with ethylene glycol, add magnesium acetate tetrahydrate and polyvinylpyrrolidone, the mass ratio of magnesium acetate tetrahydrate and polyvinylpyrrolidone is 1: 100; the three-necked flask is moved to the heater, and Connect the condensing reflux device, feed condensed water; control the reaction temperature at 180-185°C, react for two hours, and cool to room temperature naturally.

[0033] When adding reactants, control the mass ratio of magnesium acetate tetrahydrate and ethylene glycol to be 1: 29 to prepare flaky magnesium oxide (number M150, in flake shape); or, control the quality of magnesium acetate tetrahydrate and ethylene glycol The ratio is 1:39 to prepare granular magnesium oxide (code M200, in granular form).

[0034] (2) The turbid liquid obtained from the reaction was centrifuged, and the white precipitate was washed alternately with deionized water and ethanol for 2 rounds, then moved to an oven, and dried at a tem...

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Abstract

The invention relates to the technical field of nano-composite materials, and aims at providing a preparation method of a magnesium oxide / polystyrene composite dielectric material. The method comprises the following steps: adding polystyrene to N,N-dimethylformamide, and stirring the polystyrene and N,N-dimethylformamide to obtain a transparent and clarified solution; dispersing magnesium oxide in a transparent and clarified solution to obtain a uniform suspension; and carrying out tape casting on the suspension, and drying the suspension at a temperature of 60 DEG C to obtain the film-like magnesium oxide / polystyrene composite dielectric material. The uniform distribution characteristic of the electric field in the magnesium oxide and polystyrene is used to improve the comprehensive dielectric properties of the composite material at a low filling volume. The preparation method has the advantages of simplicity, high operability, easiness in obtaining of raw materials, and suitableness for industrial production. The dielectric properties of the polymer-based composites can be adjusted by adjusting the volume fraction of a filled inorganic filler. The filled volume of the inorganic filler is small, and when the filling fraction is only 8%, the dielectric properties are improved, and the good toughness of the polymer can be kept.

Description

technical field [0001] The invention relates to a preparation method of a magnesium oxide polymer film composite material, belonging to the technical field of nanocomposite materials. Background technique [0002] Polymer composite dielectric materials are widely used in integrated circuits, device miniaturization, energy storage equipment, electrowetting, and microfluidics due to their advantages of easy processing, good stability, and light weight. For example, polymer composite materials can be prepared into embedded capacitors, which is beneficial to the preparation of integrated circuits in the field of electronics and electrical engineering; the preparation of high-dielectric breakdown-resistant polymer composite materials can improve the electrical energy storage density of materials, which is conducive to the preparation of energy storage devices; The high dielectric hydrophobic insulating polymer composite material can be used as a hydrophobic insulating layer for t...

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Application Information

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IPC IPC(8): C08J5/18C08K3/22C08L25/06C01F5/02
Inventor 张启龙夏宇婷陈涛蒋永昶杨辉
Owner ZHEJIANG UNIV
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