Polyvinylidene fluoride composite material, preparation method and applications thereof

A technology of polyvinylidene fluoride and composite materials, which is applied in the field of composite materials, can solve the problems of low polar phase content of polyvinylidene fluoride, achieve the goal of increasing the content of polar phases, making the preparation method simple and easy, and facilitating large-scale production Effect

Inactive Publication Date: 2016-03-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem of low polar phase content of polyvinylidene f

Method used

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  • Polyvinylidene fluoride composite material, preparation method and applications thereof
  • Polyvinylidene fluoride composite material, preparation method and applications thereof
  • Polyvinylidene fluoride composite material, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The polyvinylidene fluoride composite material is composed of polyvinylidene fluoride and TPPB, and the TPPB content is respectively 0.5wt%, 1wt%, 2wt%, 4wt%.

[0026] The preparation method of the above-mentioned polyvinylidene fluoride composite material: add polyvinylidene fluoride and TPPB into the internal mixer according to the composition, at a temperature of 190°C and a rotation speed of 100r / min, banbury for 10 minutes to obtain polyvinylidene fluoride base composite material.

Embodiment 2

[0028] Polyvinylidene fluoride composite material, composed of polyvinylidene fluoride, organically modified montmorillonite (KSF, specific surface area 20-40m 2 / g) and TPPB composition, the content of organically modified montmorillonite is 0.5wt%, and the TPPB content is respectively 0.5wt%, 1wt%, 2wt%, 4wt%.

[0029] The preparation method of the above-mentioned polyvinylidene fluoride composite material: add polyvinylidene fluoride, KSF and TPPB into the internal mixer according to the composition, and banbury for 10 minutes at a temperature of 190 ° C and a rotation speed of 100 r / min to obtain polyvinylidene fluoride Fluorovinyl composite.

Embodiment 3

[0031] The polyvinylidene fluoride composite material is composed of polyvinylidene fluoride, carbon nanotubes and tetraphenylphosphine bromide, the content of carbon nanotubes is 5 wt%, and the content of tetraphenylphosphine bromide is 5 wt%.

[0032] The preparation method of the above polyvinylidene fluoride composite material: add polyvinylidene fluoride, carbon nanotubes and TPPB into the internal mixer according to the composition, and banbury for 15 minutes at a temperature of 185 ° C and a rotation speed of 80 r / min to obtain Polyvinylidene fluoride based composites.

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Abstract

The invention relates to a polyvinylidene fluoride composite material, a preparation method and applications thereof, and belongs to the technical field of composite materials. A purpose of the present invention is to solve the problem of low content of the polyvinylidene fluoride polar phase in the prior art. The composite material comprises, by weight, 85-95 parts of polyvinylidene fluoride, 0-5 parts of an inorganic additive, and 0.5-10 parts of an organic additive, wherein the organic additive is one or a mixture comprising a plurality of materials selected from tetraphenyl phosphonium bromide, tetraphenyl phosphonium chloride, tetraphenyl phosphonium iodide and tetraphenylphosphine imide according to any ratios. According to the present invention, the alpha phase-to-beta phase conversion of the polyvinylidene fluoride crystal is induced through the inorganic additive and the organic additive, such that the polar phase content in the polyvinylidene fluoride is substantially improved so as to substantially improve the piezoelectric property; and the polyvinylidene fluoride-based film prepared by using the composite material has the high piezoelectric constant, wherein the piezoelectric constant can achieve 25-35 pC/N.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a polyvinylidene fluoride composite material and a preparation method and application thereof. Background technique [0002] Polyvinylidene fluoride (PVDF) is a semi-crystalline high polymer under normal conditions, with a crystallinity of about 50%. At present, PVDF has five crystal forms of α, β, γ, δ and ε, which are formed under different conditions. Under certain conditions (the action of heat, electric field, machinery and radiation energy), they can be transformed into each other. The piezoelectric properties of PVDF consist of the β-phase (TTT) in which the intramolecular dipole moments point in the same direction and the γ-phase (TTT) showing certain piezoelectric properties. 3 G + T 3 G - ), so if you want to improve the piezoelectric performance of PVDF, you need to increase the β phase and γ phase in PVDF. Due to the high molecular potenti...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K5/50C08K9/04C08K3/34C08K7/24C08K3/04
CPCC08K5/50C08K3/04C08K3/346C08K7/24C08K9/04C08K2201/011C08L2203/16C08L27/16
Inventor 王雪梅葛锋付超冉祥海
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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