Bacterial cellulose flexible composite piezoelectric film and preparation method thereof

A technology of bacterial cellulose, piezoelectric thin film, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, materials for piezoelectric devices or electrostrictive devices Selecting other directions can solve problems such as toxicity and increase the cost of material production.

Active Publication Date: 2017-05-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of auxiliary dispersants will increase the production cost of materials and may cause toxicity, so it is particularly important to choose materials and processes that are cheaper and environmentally friendly

Method used

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  • Bacterial cellulose flexible composite piezoelectric film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of bacterial cellulose flexible composite piezoelectric film, said method comprising the following steps:

[0031] (1) Prepare a mixed aqueous solution containing zinc acetate and vanadium pentoxide, wherein the concentration of zinc acetate is 50 mM, and the concentration of vanadium pentoxide is 15 mM, and soak the bacterial cellulose wet film in it for 12 hours.

[0032] (2) Prepare an aqueous solution containing zinc acetate and vanadium pentoxide, then mix the aqueous solution containing zinc acetate and vanadium pentoxide with diethylene glycol at a volume ratio of 1:4 to obtain zinc acetate, vanadium pentoxide and diethylene glycol A mixed solution of glycol; in the mixed solution containing zinc acetate, vanadium pentoxide and diethylene glycol, the concentration of zinc acetate is controlled to be 10 mM, and the concentration of vanadium pentoxide is 1mM;

[0033] Immerse the bacterial cellulose soaked in step (1) into a mixed solution cont...

Embodiment 2

[0039] A preparation method of bacterial cellulose flexible composite piezoelectric film, said method comprising the following steps:

[0040](1) Prepare a mixed aqueous solution containing zinc acetate and vanadium pentoxide, wherein the concentration of zinc acetate is 40 mM, and the concentration of vanadium pentoxide is 10 mM, and soak the bacterial cellulose wet film in it for 24 hours.

[0041] (2) Prepare an aqueous solution containing zinc acetate and vanadium pentoxide, then mix the aqueous solution containing zinc acetate and vanadium pentoxide with diethylene glycol at a volume ratio of 1:3 to obtain zinc acetate, vanadium pentoxide and diethylene glycol A mixed solution of glycol; in the mixed solution containing zinc acetate, vanadium pentoxide and diethylene glycol, the concentration of zinc acetate is controlled to be 20mM, and the concentration of vanadium pentoxide is 2mM;

[0042] Immerse the bacterial cellulose soaked in step (1) into a mixed solution contai...

Embodiment 3

[0048] A preparation method of bacterial cellulose flexible composite piezoelectric film, said method comprising the following steps:

[0049] (1) Prepare a mixed aqueous solution containing zinc acetate and vanadium pentoxide, wherein the concentration of zinc acetate is 50 mM, and the concentration of vanadium pentoxide is 5 mM, and soak the bacterial cellulose wet film in it for 48 hours.

[0050] (2) Prepare an aqueous solution containing zinc acetate and vanadium pentoxide, then mix the aqueous solution containing zinc acetate and vanadium pentoxide with diethylene glycol at a volume ratio of 1:4 to obtain zinc acetate, vanadium pentoxide and diethylene glycol A mixed solution of glycol; in the mixed solution containing zinc acetate, vanadium pentoxide and diethylene glycol, the concentration of zinc acetate is controlled to be 10 mM, and the concentration of vanadium pentoxide is 1mM;

[0051] Immerse the bacterial cellulose soaked in step (1) into a mixed solution conta...

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Abstract

The invention mainly belongs to the technical field of composite piezoelectric material preparation and particularly relates to a bacterial cellulose flexible composite piezoelectric film and a preparation method thereof. The method comprises the steps of adopting bacterial cellulose as a matrix material of the composite piezoelectric film; and synthesizing vanadium-doped zinc oxide microflowers in situ in the bacterial cellulose through a solution reaction method, thereby obtaining the composite piezoelectric film with flexibility and piezoelectric property, wherein the vanadium-doped zinc oxide microflowers are formed by vanadium-doped zinc oxide nanosheets and are spherical in form and shape; the thicknesses of the vanadium-doped zinc oxide nanosheets are 10-100nm; and the sizes of the vanadium-doped zinc oxide microflowers are 1-10 microns. A piezoelectric nanostructure is uniformly filled into the composite piezoelectric film under the condition of not destroying the natural structure of the bacterial cellulose, and the filled vanadium-doped zinc oxide has a higher piezoelectric coefficient than pure zinc oxide and has the ferroelectric properties which the pure zinc oxide does not have.

Description

technical field [0001] The invention mainly belongs to the technical field of composite piezoelectric material preparation, and in particular relates to a bacterial cellulose flexible composite piezoelectric film and a preparation method thereof. The prepared flexible composite piezoelectric film has broad application prospects in the fields of energy, sensing, and medicine. Background technique [0002] Piezoelectric materials are materials that can generate electrical signals when subjected to mechanical stress, and have important applications in mechanical energy harvesting, stress-strain sensing, and micro-electromechanical systems. Traditional piezoelectric materials are mainly divided into piezoelectric ceramics and piezoelectric polymers. Among them, piezoelectric ceramics have a high piezoelectric coefficient, but their hard and brittle characteristics limit their applications in many aspects; piezoelectric polymers mainly include polypolarization Vinyl fluoride (PV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/18H01L41/37
CPCH10N30/852H10N30/092
Inventor 张跃张光杰廖庆亮马明园丁一刘硕
Owner UNIV OF SCI & TECH BEIJING
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