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Graphene-inorganic nanometer particle composite fiber and preparing method thereof

A technology of inorganic nanoparticles and composite fibers, which is applied in the direction of fiber chemical characteristics, artificial filaments made of inorganic raw materials, artificial silk manufacturing, etc., to achieve the effect of mild conditions, good mechanical properties, and good reduction degree

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

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Problems solved by technology

At the same time, in view of the limitations of the above-mentioned various fiber preparation methods, a simple, continuous graphene composite fiber material preparation method suitable for large-scale applications needs to be developed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) The preparation method of graphene oxide solution:

[0045] Add 10g of graphite, 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 it 3 times, and dry it 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 graphite with 200ml of sulfuric acid at a low temperature of 0-5°C, add 20g of potassium permanganate, add slowly, stir at 35°...

Embodiment 2

[0050] (1) The preparation method of graphene oxide solution:

[0051] Mix 45mL of concentrated sulfuric acid with 10g of graphite powder and stir. Then 15g K 2 S 2 o 8 , 15g P 2 o 5 Stir slowly and add to the above mixing system. Then the temperature was raised to 80° C., and after 6 hours of reaction, the mixture was cooled to room temperature, then carefully diluted with 1 L of deionized water, filtered, and washed until the pH value of the filtrate was neutral. After air drying, the resulting pre-oxidized graphite powder was placed in a vacuum oven at 45 °C overnight.

[0052] Add 5g of pre-oxidized graphite powder into 120mL of concentrated sulfuric acid and cool with ice water (not higher than 5°C), then slowly add 15g of KMnO while stirring 4 , and keep an ice-water bath to ensure that the temperature of the reaction system does not exceed 20 °C. After the solution was stirred at 35°C for 4 hours, it was cooled to room temperature. Add 250 mL of deionized water...

Embodiment 3

[0057] Except that following difference is arranged, other conditions are all identical with embodiment 1:

[0058] In step (2), pure graphene oxide solution, particle diameter is the ferric oxide particle of 50-100nm and water-soluble reductant NaHSO 3 Mix the prepared 8mg / ml graphene oxide mixed solution, and continuously inject the mixed solution into a polypropylene plastic tube with a diameter of 2.5mm, a length of 0.5m, and openings at both ends; wherein, graphene oxide and nanometer ferric oxide The mass ratio of particles is 1:1, and the mass ratio of graphene oxide to water-soluble reducing agent is 1:300; in step (3), the plastic tube is heated at 70° C. for 3 hours.

[0059] The electrical conductivity of the obtained graphene-ferric oxide composite fiber is greater than 8 S / cm, the average diameter of the fiber is 150-160 μm, and the tensile strength is 130-140 MPa.

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Abstract

A graphene-inorganic nanometer particle composite fiber and a preparing method thereof are disclosed. The method includes (1) continuously injecting a mixture of a graphene oxide solution, inorganic nanometer particles and a soluble reductant into a tubular reactor, (2) heating the tubular reactor in the step (1) at the same time of continuous injecting in the step (1) to obtain water-containing graphene-inorganic nanometer particle composite gel, and (3) continuously pulling the water-containing graphene-inorganic nanometer particle composite gel prepared in the step (2) out, and drying. Through continuous injecting into the tubular reactor and continuous pulling out, a procedure of continuously preparing a large amount of the composite fiber is achieved. The procedure is simple in process and mild in conditions. The prepared composite fiber combines application characteristics of a graphene fiber material and an inorganic nanometer material, is uniform in structure and excellent in mechanical performance and has potential application value in the fields of energy, catalysis, and the like.

Description

technical field [0001] The invention relates to a graphene-inorganic nano particle composite fiber 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 the discovery of graphene by British scientists Andre Gem and Costiano Voseno in 2010 and won the Nobel Prize, graphene research has reached an unprecedented research climax, and more and more studies have found that its role in energy storage , electrical devices, catalysis and biomedical special fields have great application prospects. [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 have been a lot of r...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F1/10B22F1/00
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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