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A transparent high electroactive polyvinylidene fluoride-based composite material and its preparation method

A polyvinylidene fluoride and composite material technology, which is applied in the field of transparent high electroactive polyvinylidene fluoride vinyl composite material and its preparation, can solve the problems of high electrical conductivity, high dielectric loss, etc. Active, effect of excellent mechanical properties

Active Publication Date: 2021-07-30
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high conductivity of the doped ionic liquid, it is easy to generate high dielectric loss during electric field polarization, which is unfavorable for piezoelectric materials as energy storage and other applications.

Method used

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  • A transparent high electroactive polyvinylidene fluoride-based composite material and its preparation method
  • A transparent high electroactive polyvinylidene fluoride-based composite material and its preparation method
  • A transparent high electroactive polyvinylidene fluoride-based composite material and its preparation method

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preparation example Construction

[0031] The present invention also provides a method for preparing a transparent and highly electroactive polyvinylidene fluoride-based composite material, the method comprising:

[0032] Put polyvinylidene fluoride, ionic liquid and clay in a mass ratio of 100:0.05-10:0.01-3, add them to the melt blending equipment and knead at 175-200°C, and then cold press the blend , to obtain polyvinylidene fluoride-based composites.

[0033] According to the present invention, prior to the mixing, the polyvinylidene fluoride, the ionic liquid and the clay are preferably vacuum-dried at 60-80° C. for 24-48 hours.

[0034] According to the present invention, the melt blending equipment is internal mixer, screw extruder or film blowing machine. When using internal mixer for blending, the rotor speed of internal mixer is preferably 40-60rpm, and the blending time is preferably 4-10min; when using screw extruder for blending, the screw speed is preferably 40-60rpm; when using When blending i...

Embodiment 1

[0049] 1) Dry polyvinylidene fluoride, 1-hexadecyl-3-methylimidazolium chloride and montmorillonite in vacuum at 70°C for 24 hours;

[0050] (2) Add 60g of dried polyvinylidene fluoride, 0.06g of 1-hexadecyl-3-methylimidazolium chloride salt and 0.06g of montmorillonite into the internal mixer, melt and knead at 190°C for 5min, and the rotor Speed ​​is 60rpm, obtains mixture;

[0051] (3) The mixture obtained in the step (2) is cold-pressed and molded under a tablet machine to obtain a polyvinylidene fluoride composite material.

Embodiment 2

[0053] 1) Dry polyvinylidene fluoride, 1-hexadecyl-3-methylimidazolium chloride and montmorillonite in vacuum at 70°C for 24 hours;

[0054] (2) Add 60g of dried polyvinylidene fluoride, 0.3g of 1-hexadecyl-3-methylimidazolium chloride salt and 0.06g of montmorillonite into the internal mixer, melt and knead at 190°C for 5min, and the rotor Speed ​​is 60rpm, obtains mixture;

[0055] (3) The mixture obtained in the step (2) is cold-pressed and molded under a tablet machine to obtain a polyvinylidene fluoride composite material.

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Abstract

The invention provides a transparent and highly electrically active polyvinylidene fluoride-based composite material and a preparation method thereof, which belong to the field of polymer materials and advanced nanometer composite materials. The composite material is obtained by blending polyvinylidene fluoride, ionic liquid and clay at a mass ratio of 100:0.05-10:0.01-3. The invention also provides a preparation method of a transparent and highly electrically active polyvinylidene fluoride-based composite material. The composite material of the present invention has high permeability and 100% polar crystals; in addition, the clay can inhibit the migration of the ionic liquid under the electric field and reduce the dielectric loss of the composite material, which broadens its potential as a piezoelectric application of materials.

Description

technical field [0001] The invention belongs to the field of macromolecular materials and advanced nanocomposite materials, and in particular relates to a transparent and highly electrically active polyvinylidene fluoride-based composite material and a preparation method thereof. Background technique [0002] Polyvinylidene fluoride (PVDF) is an important semi-crystalline polymer material with excellent heat resistance, chemical corrosion resistance, mechanical properties, piezoelectric and ferroelectric properties, and due to its good processing properties, it can be The multifunctional thin film products made of various shapes have received extensive attention in academia and industry. PVDF membranes are widely used, mainly involving biomedicine, energy harvesting and storage, monitoring and control systems, separators and filter membranes, and smart stents. According to the different molecular chain conformations, PVDF exhibits a variety of different crystal structures (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K3/34C08K5/3445
CPCC08K3/346C08K5/3445C08L2201/10C08L27/16
Inventor 孙树林宋士新夏珊刘岩吕雪
Owner CHANGCHUN UNIV OF TECH
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