A kind of graphene oxide-fluorine-containing piezoelectric plastic composite film and preparation method thereof

A technology of fluorine-containing piezoelectric and composite thin films, which is applied in the field of modification of fluorine-containing piezoelectric plastics, and can solve the problems that cannot be prepared on a large scale and require specific spin-coating equipment.

Inactive Publication Date: 2020-09-11
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the Chinese patent application number 201510392607.3 discloses "a preparation method of polyvinylidene fluoride nano-film with β crystal phase". , epoxy group) graphene oxide and use the spin coating process to increase the β crystal phase content, which requires specific spin coating equipment and cannot be prepared on a large scale

Method used

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  • A kind of graphene oxide-fluorine-containing piezoelectric plastic composite film and preparation method thereof
  • A kind of graphene oxide-fluorine-containing piezoelectric plastic composite film and preparation method thereof
  • A kind of graphene oxide-fluorine-containing piezoelectric plastic composite film and preparation method thereof

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preparation example Construction

[0024] The invention provides a method for preparing a graphene oxide-fluorine-containing piezoelectric plastic composite film, which includes the following steps:

[0025] Mixing graphene oxide, water, coupling agent and amino polyethylene glycol monomethyl ether to modify the graphene oxide to obtain polyethylene glycol modified graphene oxide;

[0026] The polyethylene glycol modified graphene oxide is mixed with an organic solvent and a fluorine-containing piezoelectric plastic to obtain a mixed solution, and the mixed solution is dried to obtain a polyethylene glycol modified graphene oxide and a fluorine-containing piezoelectric plastic Mixed materials of plastics;

[0027] Under the condition of 200-220°C, the mixed material is pressed into a film to obtain a graphene oxide-fluorine-containing piezoelectric plastic composite film.

[0028] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those sk...

Embodiment 1

[0050] The preparation route of polyethylene glycol modified graphene oxide is as follows figure 1 Shown.

[0051] Pour 2 g of graphene oxide into 400 mL of distilled water, and ultrasonically disperse to obtain a graphene oxide dispersion;

[0052] Pour 6g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and 3g N-hydroxysuccinimide (NHS) into the graphene oxide dispersion and stir until After it is fully dissolved, pour 8g of amino polyethylene glycol monomethyl ether into it. After ultrasonic dispersion, stir at a stirring rate of 200 rpm and a temperature of 30°C for 72 hours. After the stirring is completed, use distilled water as a detergent at 10000 rpm. At the centrifugal speed, carry out centrifugal washing, centrifugal washing 8 times, each centrifugal washing time is 10min, suction filter, and dry the filtered material at 60℃ for 72 hours to obtain polyethylene glycol modified graphene oxide ;

[0053] The obtained polyethylene glycol modified graphene ox...

Embodiment 2

[0061] The preparation of polyethylene glycol modified graphene oxide is as in Example 1.

[0062] Add 0.1g polyethylene glycol modified graphene oxide to 10g DMAc (dimethylacetamide) solvent, ultrasonically disperse, then add 0.9g polyvinylidene fluoride-hexafluoroisopropylene, and stir for 1.5 hours at 75℃ to form Homogeneous solution, and pour the homogeneous solution into a clean petri dish, put it in a blast oven at 75℃, dry for 72 hours, obtain polyethylene glycol modified graphene oxide and polyvinylidene fluoride-hexafluoroiso Mixed materials of propylene;

[0063] The obtained mixed material was put into two iron plates of a tablet press, and the two iron plates were clamped and put into the tablet press to be pressed into a film under the conditions of 210°C and 9 MPa to obtain a graphene oxide-fluorine-containing press Electric plastic composite film.

[0064] The graphene oxide-fluorine-containing piezoelectric plastic composite film obtained is subjected to FTIR test, ...

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Abstract

The invention discloses a preparation method of a graphene oxide-fluorine-containing piezoelectric plastic composite membrane. The preparation method comprises the following steps of mixing graphene oxide, water, a coupling agent and methoxypolyethylene glycol amine, and performing modification treatment on the graphene oxide to obtain polyethylene glycol modified graphene oxide; mixing the polyethylene glycol modified graphene oxide, an organic solvent and fluorine-containing piezoelectric plastics to obtain a mixed solution, and drying the mixed solution to obtain a mixed material of the polyethylene glycol modified graphene oxide and the fluorine-containing piezoelectric plastics; and pressing the mixed material to form a membrane under the condition with the temperature of 200-220 DEGC to obtain the graphene oxide-fluorine-containing piezoelectric plastic composite membrane. According to a recordation of the embodiment of the invention, the polar crystal content of the graphene oxide-fluorine-containing piezoelectric plastic composite membrane prepared by utilizing the preparation method is 68 percent or above.

Description

Technical field [0001] The invention relates to the technical field of modification of fluorine-containing piezoelectric plastics, in particular to a graphene oxide-fluorine-containing piezoelectric plastic composite film and a preparation method thereof. Background technique [0002] Piezoelectric polymer is a polymer material that deforms under the action of external force and can convert mechanical energy into electrical energy. Because of its flexibility, low density, low processing temperature, it can be processed into large-size or complex-shaped films Such advantages have been widely used in the fields of acoustics, electronics, surveying, military, transportation, information engineering, and geological prospecting. The most commonly used piezoelectric polymers are certain fluoroplastics, including polyvinylidene fluoride homopolymer, polyvinylidene fluoride-chlorotrifluoroethylene copolymer, polyvinylidene fluoride-hexafluoroisopropylene copolymer, etc. The electrical p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K9/04C08K3/04C08J5/18
CPCC08J5/18C08J2327/16C08K3/042C08K9/08
Inventor 何富安郑旭民林悦凤林博黄军左张世杰
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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