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Bacterial cellulose modified Bucky paper as well as preparation method and application thereof

A technology of bacterial cellulose and bucky paper, applied in the field of bacterial cellulose modified bucky paper and its preparation, can solve problems such as poor flexibility and limitations, achieve improved mechanical properties, easy large-scale manufacturing, and simple preparation methods Effect

Pending Publication Date: 2021-12-14
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength and elongation at break of the currently prepared bucky paper are about 6MPa and 2%, respectively, and the poor flexibility limits its further application.

Method used

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  • Bacterial cellulose modified Bucky paper as well as preparation method and application thereof
  • Bacterial cellulose modified Bucky paper as well as preparation method and application thereof
  • Bacterial cellulose modified Bucky paper as well as preparation method and application thereof

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preparation example Construction

[0031] The invention provides a kind of preparation method of bacterial cellulose modified bucky paper, comprising the following steps:

[0032] The bacterial cellulose aqueous dispersion and the carbon nanotube aqueous dispersion are mixed for modification to obtain bacterial cellulose modified bucky paper.

[0033] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0034] In the present invention, the diameter of the bacterial cellulose (BC) in the bacterial cellulose aqueous dispersion is preferably 50-100 nm, and the length is preferably 20-200 μm; the present invention has no special limitation on the source of the bacterial cellulose, Commercially available products well known in the art can be used. In the embodiment of the present invention, the solid content of the bacterial cellulose is 0.65 wt%.

[0035] In the present invention, the concentration of ...

Embodiment 1

[0048] 5 mL bacterial cellulose aqueous dispersion (0.6 mg / mL) and 45 mL carbon nanotube aqueous dispersion (0.6 mg / mL) were stirred for 30 min, and the resulting blended solution was vacuum filtered through a mixed filter membrane with a pore size of 0.45 μm. The density is 0.1MPa. After washing the obtained bacterial cellulose modified bucky paper sheet with excess deionized water, soak it in an acetone bath for several times to remove the mixed filter membrane. After drying, the bacterial cellulose modified bucky paper B- BP, with a thickness of 35 μm, is recorded as 10% BC.

Embodiment 2

[0050] The difference between this embodiment and embodiment 1 is only: 10mL bacterial cellulose aqueous dispersion (0.6mg / mL) and 40mL carbon nanotube aqueous dispersion (0.6mg / mL), others are the same as embodiment 1, thickness is 35 μ m, Recorded as 20% BC.

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Abstract

The invention provides bacterial cellulose modified Bucky paper as well as a preparation method and application thereof, and belongs to the technical field of flexible electronic materials. According to the invention, carbon nanotubes and bacterial cellulose are blended, so that the carbon nanotubes and the bacterial cellulose form an interpenetrating network structure through mutual entanglement, the addition of the bacterial cellulose with good mechanical properties can improve the flexibility of the carbon nanotube Bucky paper, and excellent conductivity, Joule heating performance, heat conduction performance, electromagnetic shielding performance and humidity sensing performance are maintained while the flexibility of the material is improved . The maximum tensile strength of the prepared B-BP is 55.78 MPa, the elongation at break is 11.67%, and the conductivity exceeds 16.67 S / cm; 6 V voltage is loaded, and the balance temperature exceeds 124 DEG C; the heat conductivity exceeds 7.393 W / mK; when the thickness is 35 microns, the electromagnetic shielding effectiveness reaches 24.01 dB; and when used as a humidity sensor, the humidity sensitivity exceeds 5.

Description

technical field [0001] The invention relates to the technical field of flexible electronic materials, in particular to a bacterial cellulose modified bucky paper and its preparation method and application. Background technique [0002] With the vigorous development of 5G communication technology, the extensive use of wearable electronic devices has also produced electromagnetic radiation while improving people's living standards. Electromagnetic pollution not only affects the normal operation of equipment, but also threatens human health. In order to reduce electromagnetic pollution and meet wearable requirements, ultra-thin, highly flexible, and high-performance electromagnetic shielding materials have become a research trend. [0003] Compared with traditional metal-based materials, conductive polymer-based composites have attracted extensive attention due to their flexibility, light weight, and corrosion resistance. However, since the conductive filler is easy to agglom...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L1/02C08K3/04
CPCC08J5/18C08J2301/02C08K3/041C08K2201/011
Inventor 宾月珍樊明帅言爱明
Owner DALIAN UNIV OF TECH
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