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Preparation method and application of functionalized graphene oxide/bacterial cellulose/carbon nano tube composite membrane

A carbon nanotube composite and bacterial cellulose technology, applied in the field of graphene, can solve the problems of restricted application range and low flux of separation membrane

Active Publication Date: 2017-07-04
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, vacuum filtration will make the graphene oxide sheets densely stacked, the flux of the separation membrane with a thickness of micron is extremely low, and the separation membrane with a thickness of nanometer cannot be separated from the support of the base membrane, which hinders its application range.

Method used

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  • Preparation method and application of functionalized graphene oxide/bacterial cellulose/carbon nano tube composite membrane
  • Preparation method and application of functionalized graphene oxide/bacterial cellulose/carbon nano tube composite membrane

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preparation example Construction

[0035] The invention provides a kind of preparation method of functionalized graphene oxide / bacterial cellulose / carbon nanotube composite film, comprising the following steps:

[0036] A) mixing the surface-functionalized bacterial cellulose solution with carbon nanotubes to obtain a first mixed solution;

[0037] B) The first mixed solution is mixed with the functionalized graphene oxide solution and then vacuum filtered to obtain a graphene / bacterial cellulose / carbon nanotube composite membrane.

[0038] In the invention, firstly, the bacterial cellulose solution with surface functionalization is mixed with carbon nanotubes to obtain the first mixed solution.

[0039] Wherein, the surface functionalized bacterial cellulose is prepared according to the following method:

[0040] adding the solution of the surface functionalization reagent to the bacterial cellulose solution, and stirring thoroughly to obtain a surface functionalized bacterial cellulose solution;

[0041] Th...

Embodiment 1

[0076] Disperse 0.5g of carbon nanotubes into 300mL, 30% (70mLH 2 (0+30mLNaClO) sodium hypochlorite solution, stirring continuously to make it fully dispersed in the NaClO solution, and reacting at 25°C for 12h. After the reaction is finished, it is filtered and washed repeatedly with water to obtain acidified carbon nanotubes.

[0077] First, according to the mass ratio of polydiallyldimethylammonium chloride (PDDA) to bacterial cellulose of 1:10, polydiallyldimethylammonium chloride (PDDA) was added to 1 mg / mL of bacteria In the cellulose solution, the surface of bacterial cellulose is functionalized to make the surface positively charged; then according to the mass ratio of bacterial cellulose to acidified carbon nanotubes of 20:1, the acidified carbon nanotubes are added to the above functional In the acidified bacterial cellulose solution, the acidified carbon nanotubes are negatively charged, and the negatively charged carbon nanotubes are combined with the positively c...

Embodiment 2

[0103] First, take a certain amount of cetyltrimethylammonium bromide (CTAB) and dissolve it in deionized water to form a 0.5 mg / mL CTAB solution; then add the CTAB solution to the bacterial cellulose solution with a concentration of 1 mg / mL . Wherein, the mass ratio of CTAB to the bacterial cellulose solution is 1:10; then the acidified carbon nanotubes are added to the bacterial cellulose solution, wherein the mass of the acidified carbon nanotubes prepared by the bacterial cellulose and Example 1 The ratio is 30:1, and fully stirred to obtain the first mixed solution.

[0104] Then, trishydroxymethylaminomethane was dissolved in deionized water to form a 1mol / L solution (Tris solution); then dilute hydrochloric acid with pH=6 was added to the solution to adjust the pH of the solution to 8.5 to obtain Tris-HCl Buffer solution; adding dopamine into the above buffer solution and stirring thoroughly, wherein the concentration of dopamine is 10 mg / mL. The above-mentioned Tris-...

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Abstract

The invention provides a preparation method of a functionalized graphene oxide / bacterial cellulose / carbon nano tube composite membrane. The preparation method comprises the following steps of A) mixing a surface functionalized bacterial cellulose solution with a carbon nano tube to obtain a first mixed solution; and B) mixing the first mixed solution with a functionalized graphene oxide solution, performing ultrasonic treatment and then performing vacuum suction filtration to obtain the functionalized graphene oxide / bacterial cellulose / carbon nano tube composite membrane. When the obtained composite membrane serves as a separation membrane, the composite membrane has high throughput, high stability and high separation efficiency. In addition, when the composite membrane is treated by hydroiodic acid or hydrazine hydrate, the composite membrane can serve as an electrode material of a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a functionalized graphene oxide / bacterial cellulose / carbon nanotube composite membrane, a preparation method and an application thereof. Background technique [0002] Graphene is made of carbon atoms with sp 2 Planar thin films composed of hybrid orbitals in a two-dimensional periodic honeycomb lattice structure are considered to be an ideal film-forming unit body because of their single-atom thickness and almost friction-free surface. The delocalized electron cloud on the π orbital on the surface of the sheet can block all molecules from passing through the hole in the center of the aromatic ring, and can be used as a medium to block gas or liquid during separation. By creating holes in graphene sheets, molecules of different sizes can be separated. [0003] A graphene oxide separation membrane constructed from a graphene oxide solution by vacuum filtration is a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/36H01G11/26H01G11/86
CPCY02E60/13H01G11/32H01G11/26H01G11/36H01G11/86
Inventor 郑直周旭峰刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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