An amino-enhanced graphene membrane, a nitrogen-doped graphene membrane and preparing methods thereof

A graphene film and graphene hydrogel technology, applied in the field of amine-based reinforced graphene film, can solve the problems of high temperature and low mechanical strength of graphene film, and achieve low cost, uniform appearance and internal structure, and electrical conductivity. and strength-enhancing effect

Active Publication Date: 2016-10-19
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an amine-based reinforced graphene film, nitrogen Doped graphene film and preparation method thereof

Method used

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  • An amino-enhanced graphene membrane, a nitrogen-doped graphene membrane and preparing methods thereof

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Experimental program
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Embodiment 1

[0034] A kind of amine-based reinforced graphene film, its preparation method is as follows:

[0035] (1) 1. the preparation of graphene oxide solution:

[0036]Add 10g of flake graphite with a diameter of 500 microns, 150ml of 98% sulfuric acid, and 30ml of nitric acid into a 500ml Erlenmeyer flask and stir at room temperature for 24 hours, slowly pour it into 1L of water to collect the solid, wash 3 times, and dry at 80°C for 4 hours. Repeat the pre-oxidation process twice. The dried pre-oxidized graphite was put into a box furnace and thermally expanded at 900°C for 20s to obtain thermally expanded graphite oxide. In a 500ml wide-mouth Erlenmeyer flask, mix 5g of heat-expandable graphite oxide with 300ml of sulfuric acid, 5g of K 2 S 2 o 8 , 7g of phosphorus pentoxide mixed and heated at 80°C for 4 hours, diluted with 2L of water, filtered and washed, dried in air for 3 days to obtain pre-oxidized thermally expandable graphite. Mix dry pre-oxidized heat-expandable grap...

Embodiment 2

[0042] A kind of amine-based reinforced graphene film, its preparation method is as follows:

[0043] Carry out according to the preparation method of embodiment 1, except that there are following differences, other conditions are all the same: the composite reducing agent that pure graphene oxide solution, butylenediamine and hydroiodic acid and hydrobromic acid are formed mixes (wherein graphite oxide The mass ratio of ethylene, butylenediamine, hydroiodic acid and hydrobromic acid is 1:50:50:50) and the graphene oxide mixed solution of 2mg / ml prepared is injected square flat polypropylene (PP) plastic reactor ( Inner height 8mm, length 10cm, width 10cm), seal the port; heat the sealed plastic tube at 90°C for 3h; Dry for 72 hours.

[0044] The conductivity of the obtained amine-based reinforced graphene film is greater than 8 S / cm, and its film thickness, area and tensile strength are shown in Table 1.

Embodiment 3

[0046] A kind of amine-based reinforced graphene film, its preparation method is as follows:

[0047] According to the preparation method of Example 1, except for the following differences, other conditions are the same: the composite cross-linking agent composed of pure graphene oxide solution, propylenediamine and triethylenetetramine and NaHSO 3 Mixed (wherein graphene oxide, propylenediamine, triethylenetetramine and NaHSO 3 The mass ratio is 1:0.1:0.5:100) The prepared 30mg / ml graphene oxide mixed solution is injected into a square flat polypropylene (PP) plastic reactor (inner height 1mm, length 10cm, width 10cm), sealed The port is sealed; the sealed plastic tube is heated at 80° C. for 4 hours; and the obtained amine-reinforced graphene hydrogel is dried at 50° C. for 60 hours in a blast oven.

[0048] The electrical conductivity of the obtained amine-based reinforced graphene film is greater than 8 S / cm, and its film thickness, area and tensile strength are shown in ...

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Abstract

An amino-enhanced graphene membrane and a preparing method thereof are disclosed. The method includes (1) adding a mixture of a graphene oxide solution, a water-soluble amine type crosslinking agent and a water-soluble reductant into a flat-shape hollow reactor, with the water-soluble amine type crosslinking agent being one or more selected from a group consisting of ethylenediamine, diaminopropane, diaminobutane, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, ammonia, poly(allylamine) and para-phenylene diamine, and the water-soluble reductant being one or more selected from a group consisting of ascorbic acid, sodium ascorbate, sodium citrate, hydroiodic acid, hydrobromic acid, sodium hydrogen sulfite and sodium sulfide, (2) heating the reactor at 60-95 DEG C, and (3) drying amino-enhanced graphene hydrogel prepared in the step (2). A nitrogen-doped graphene membrane and a preparing method thereof are also disclosed. The nitrogen-doped graphene membrane is prepared by subjecting the amino-enhanced graphene membrane to heat processing. The methods are simple and mild in conditions, and the prepared graphene membranes are uniform in structure and excellent in mechanical properties.

Description

technical field [0001] The invention relates to an amine-based reinforced graphene film, a nitrogen-doped graphene film and a preparation method thereof. Background technique [0002] As the most basic structural unit of all carbon materials, graphene has a true monoatomic layer thickness and a strict two-dimensional structure, and has high mechanical strength, elasticity, thermal conductivity, electrical conductivity, and quantum Hall effect. Since British scientists Andre Geim and Konstantin Novoselov won the Nobel Prize for discovering graphene in 2010, graphene research has reached an unprecedented research climax, and more and more The research found that it has great application prospects in the special fields of energy storage, electrical devices, catalysis and biomedicine. [0003] From the perspective of practical application, it is undoubtedly a very valuable research direction to transform nanographene materials into macrostructure materials. At present, there h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 李吉豪李景烨李林繁张阔贾娜
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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