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Preparation method of graphene-based composite membrane

A graphene composite and graphene technology, applied in the field of continuous preparation of composite membranes, can solve the problems of difficulty in large-scale preparation and application of graphene composite membranes, complex preparation methods, poor controllability of membrane structures, etc., and achieve low cost , Wide range of raw material sources and many types of effects

Active Publication Date: 2014-12-17
ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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  • Application Information

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Problems solved by technology

[0004] However, the existing reported preparation methods are complicated in process, poor in controllability of film structure, time-consuming and energy-consuming, and it is difficult to realize large-scale preparation and application of graphene composite films with regular structures.
Continuous preparation of structured and size-controllable graphene composite films remains a challenge

Method used

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  • Preparation method of graphene-based composite membrane
  • Preparation method of graphene-based composite membrane
  • Preparation method of graphene-based composite membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) 1 part by weight of graphene oxide, 1 part by weight of sodium alginate, and 20 parts by weight of deionized water were ultrasonically treated at 75° C. for 6 hours at 30 KHz to obtain a graphene oxide / sodium alginate mixture.

[0033] (2) Extrude the graphene oxide / sodium alginate mixture at an extrusion speed of 10 mL / h in a preparation device with a straight die, and put it in an aqueous solution of potassium chloride and sodium chloride at 20°C ( The mass fractions of sodium chloride and potassium chloride are both 2.5%) and stay for 20s to solidify to form a film, and a graphene oxide / sodium alginate composite film is obtained.

[0034] (2) The graphene oxide / sodium alginate membrane obtained in step (1) was placed in hydrazine hydrate with a mass fraction of 20% for reduction for 2 hours, washed and dried to obtain a graphene / sodium alginate composite membrane.

[0035] Through the above steps, a graphene / sodium alginate composite film with a width of 150 mm a...

Embodiment 2

[0038] (1) 1 part by weight of graphene, 0.1 part by weight of polyethersulfone, and 20 parts by weight of N-methylpyrrolidone were ultrasonically treated at 100° C. for 3 hours at 50 KHz to obtain a graphene / polyethersulfone mixture.

[0039] (2) Extrude the graphene / polyethersulfone mixture at a speed of 100 mL / h in a preparation device with a straight die, and put it in a methanol solution of sodium hydroxide (10% by mass fraction) at 20°C ) for 20s to solidify into a film, and a graphene / polyethersulfone composite film was obtained after drying.

[0040] Through the above steps, a graphene / polyethersulfone composite membrane with a width of 200 mm and a thickness of 200 microns was prepared. The prepared composite film not only has the conductivity of graphene (10000S / m), but also has the elasticity of polyethersulfone polymer, and the elongation at break reaches 10%, which can be used as an antistatic film. At the same time, this composite film bubble has no obvious defo...

Embodiment 3

[0042] (1) 1 part by weight of graphene oxide, 0.01 part by weight of polystyrene, and 50 parts by weight of tetrahydrofuran were ultrasonically treated at 30° C. for 1 hour at 20 KHz to obtain a graphene oxide / polystyrene mixture.

[0043] (2) Extrude the graphene oxide / polystyrene mixture at an extrusion speed of 30 mL / h in a preparation device with a straight die, and put it in an aqueous solution of calcium chloride and sodium chloride (chloride) at 20 °C. The mass fractions of calcium chloride and sodium chloride are both 5%) to solidify into a film for 10 seconds, and a graphene oxide / polystyrene composite film is obtained after drying.

[0044] (3) Put the graphene oxide / polystyrene composite film in 20% sodium thiosulfate aqueous solution for reduction for 2 hours, wash and dry to obtain the graphene / polystyrene composite film.

[0045] After the above steps, a graphene / polystyrene composite film with a width of 300 mm and a thickness of 50 microns is prepared. The str...

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Abstract

The invention discloses a preparation method of a graphene-based composite membrane. The method comprises the following steps: extruding a mixed liquid of graphene or graphene oxide compounds in a preparation device of a linear die orifice by adopting a solution wet spinning process, solidifying in a solidification liquid with a graphene or graphene oxide liquid crystal as a template to form a graphene or graphene oxide-based composite gel membrane with a lamellar structure, and drying to obtain the continuous macroscopical graphene or graphene oxide-based composite membrane. The method is simple and convenient, simple in process and wide in compoundable material range; the obtained graphene-based composite membrane is adjustable in size and is applied in various different industrial fields according to different composite materials.

Description

technical field [0001] The invention relates to a continuous preparation method of a composite film, in particular to a preparation method based on graphene composite film. Background technique [0002] Since Andre Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom won the Nobel Prize in Physics for the first successful separation of stable graphene in 2010, graphene is known for its unique two-dimensional structure and excellent performance (Science, 2008, 321 , 385-388) set off an upsurge of research all over the world. Macroscopically assembled graphene film is the main application form of nano-scale graphene. By compounding with different polymers, graphene composite films with different functions can be obtained. Graphene composite films have the following advantages: (1) Graphene has excellent performance, chemical It has good stability and can be prepared in large quantities; (2) the structure and performance of the composite membrane...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/04C08K3/04C08L81/06C08L25/06C08L29/04C08L33/20C08L33/12C08L5/08C08L33/26C08L63/00
Inventor 高超刘峥胡晓珍李拯夏芝香
Owner ZHEJIANG TANGUSHANGXI MATERIAL SCI & TECH
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