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Nylon 1111/ polyvinylidene fluoride ferroelectric composite film and preparation method thereof

A technology of polyvinylidene fluoride iron and polyvinylidene fluoride, which is applied in the field of preparation of polymer blended composite materials, can solve the problems of ferroelectric materials that have not been reported in literature, and achieve low overall cost, simple preparation method, and low cost Effect

Active Publication Date: 2015-05-20
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there has been no literature report on the preparation of ferroelectric materials by combining odd-odd nylon and polyvinylidene fluoride.

Method used

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  • Nylon 1111/ polyvinylidene fluoride ferroelectric composite film and preparation method thereof
  • Nylon 1111/ polyvinylidene fluoride ferroelectric composite film and preparation method thereof
  • Nylon 1111/ polyvinylidene fluoride ferroelectric composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Nylon 1111 and polyvinylidene fluoride particles were vacuum-dried at 100°C for 24 hours, and 30 parts of nylon 1111 particles and 70 parts of polyvinylidene fluoride were added to the Haake rheometer according to parts by weight for blending, blending temperature 210°C, screw speed 60r / min, blending time 5min. The blended material is sandwiched between two aluminum foils, and hot-pressed on a hot press to form a film with a thickness of about 50 μm. Hot-pressing temperature is 210 ℃, hot-pressing pressure 6MPa, hot-pressing time 8min. Then quickly transfer the film in the molten state to an ice-water mixture for quenching, and dissolve the aluminum foil on both sides of the quenched film with a strong alkali solution of 5% sodium hydroxide at a temperature of 20°C to obtain an initial film and dry it naturally. Stretching at room temperature to obtain a stretched film sample with a thickness of 30 microns, the stretch ratio n =3.

Embodiment 2

[0034] Nylon 1111 and polyvinylidene fluoride particles were vacuum-dried at 80°C for 24 hours, and 50 parts of nylon 1111 particles and 50 parts of polyvinylidene fluoride were added to the Haake rheometer according to parts by weight for blending. The blending temperature was 210°C. The rotating speed is 60r / min, and the blending time is 5min. Take the blended material and sandwich it between two pieces of aluminum foil, and press it on a hot press to form a film with a thickness of about 50 μm. Hot-pressing temperature is 210 ℃, hot-pressing pressure 6MPa, hot-pressing time 8min. Then quickly transfer the film in the molten state to an ice-water mixture for quenching, and dissolve the aluminum foil on both sides of the quenched film with a strong alkali solution of potassium hydroxide with a mass concentration of 30% at a temperature of 10°C to obtain an initial film and dry it naturally. Stretch ratio at room temperature n =3, the ferroelectric composite thin film sample...

Embodiment 3

[0036] Nylon 1111 and polyvinylidene fluoride particles were vacuum-dried at 100°C for 24 hours, and 70 parts of nylon 1111 particles and 30 parts of polyvinylidene fluoride were added to the Haake rheometer according to parts by weight for blending, the blending temperature was 240°C, and the screw speed was 60r / min, blending time 5min. The blended material is sandwiched between two aluminum foils, and hot-pressed on a hot press to form a film with a thickness of about 50 μm. Hot-pressing temperature is 220 ℃, hot-pressing pressure 6MPa, hot-pressing time 8min. Then quickly transfer the film in the molten state to a mixture of ice and water for quenching. At 0°C, dissolve the aluminum foils on both sides of the quenched film with a strong alkali solution of 20% mass concentration of sodium hydroxide to obtain an initial film and dry it naturally. Stretched on a tensile machine at a temperature of 50°C, the stretch ratio n =3, the ferroelectric composite thin film sample wit...

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Abstract

The invention belongs to the field of high-polymer blending composite material preparation and discloses a nylon 1111 / polyvinylidene fluoride ferroelectric composite film and a preparation method thereof. The ferroelectric composite film disclosed by the invention is prepared by 20-80 parts of nylon 1111 and 80-20 parts of polyvinylidene fluoride. The preparation method comprises the following steps: firstly blending the nylon 1111 and polyvinylidene fluoride in melt mixing equipment, then hot-pressing the mixture by hot pressing equipment into a film, quenching the molten film and finally stretching by uniaxial tension of a stretching device to obtain the nylon 1111 / polyvinylidene fluoride ferroelectric composite film. The composite film prepared according to the invention exceeds a pure polyvinylidene fluoride film in remanent polarization strength. The preparation method disclosed by the invention has simple preparation process, industrially common equipment and easy operation. The ferroelectric composite film is low in cost, and is expected to be used for apparatus preparations in the fields of piezoelectric, pyroelectric and ferroelectric materials.

Description

technical field [0001] The invention belongs to the field of polymer blend composite material preparation, and in particular relates to a nylon and polyvinylidene fluoride composite ferroelectric film and a preparation method thereof. Background technique [0002] Ferroelectric materials refer to materials that have spontaneous polarization and whose polarization direction can be reversed with the reversal of the applied electric field. Ferroelectric materials have piezoelectric, pyroelectric, acousto-optic, electro-optic, nonlinear optics and photorefractive effects at the same time, so they have been widely used in the fields of optoelectronics, microelectronics and integrated optics. Compared with ferroelectric ceramics, polymer ferroelectric materials have lower density, higher flexibility, easy large-area molding, tailorability, and high dielectric breakdown strength. They occupy a very unique position in the application of transducers and sensors. Polymer ferroelectri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L27/16
CPCC08J5/18C08J2327/16C08J2377/06C08J2427/16C08J2477/06C08L27/16C08L77/06C08L2203/16
Inventor 赵清香刘少兵刘民英付鹏崔喆张玲丽李会亚
Owner ZHENGZHOU UNIV
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