Graphene/lysine nano composite material and preparation method thereof

A nanocomposite material and graphene technology, which is applied in the field of graphene/lysine nanocomposite preparation, can solve the problems such as the difficulty of uniform dispersion and agglomeration of graphene, and achieve excellent biocompatibility, water solubility, and production efficiency. The effect of high and low production cost

Inactive Publication Date: 2012-05-02
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a graphene / lysine nanocomposite material for the problem that graphene is difficult to uniformly disperse in aqueous solution, and even serious agglomeration phenomenon can occur in the prior art

Method used

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  • Graphene/lysine nano composite material and preparation method thereof
  • Graphene/lysine nano composite material and preparation method thereof
  • Graphene/lysine nano composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] ①Preparation of graphite oxide: Slowly add 1g of 200 mesh natural graphite powder into a 500ml beaker containing 23ml of concentrated sulfuric acid under stirring, keep the temperature at 0°C, then slowly add 0.5g of sodium nitrate and 3g of potassium permanganate The mixture was stirred and reacted at 0°C for 2 hours, and then kept in a constant temperature water bath at 35°C for 30 minutes under stirring, slowly adding 46ml of water to raise the temperature to 98°C, and maintained at this temperature for 15 minutes; dilute to 140ml with warm water, pour Inject a certain amount of H 2 o 2 , at this time the color of the solution turns bright yellow, filter it while it is hot, and wash the filter cake fully with 5% HCl until there is no SO in the filtrate 4 2- (with BaCl 2 solution detection), anhydrous CaCl at 50°C 2 In the presence of vacuum drying for 24h, graphite oxide powder was obtained.

[0034] ② Preparation of copper lysine: Add 1.8g lysine into a round b...

Embodiment 2

[0037] 1. the preparation of graphite oxide: with embodiment 1

[0038] 2. the preparation of copper lysine: with embodiment 1

[0039] ③Preparation of graphene / copper lysine nanocomposites: Disperse 0.1 g of graphite oxide in a round-bottomed flask filled with 150 mL of secondary water and sonicate for 1.5 h to obtain a uniformly dispersed graphite oxide suspension. After adding 0.2 g of copper lysine and stirring for 15 min, the pH was adjusted to 9-10 with concentrated NaOH solution, and the reaction was stirred and refluxed at 70° C. for 22 h. Add 0.8g NaBH 4 As a reducing agent, stir and reflux at 70°C for 1.5h, filter the product, wash repeatedly with distilled water, and dry to obtain a nanocomposite of Gs / Lys-Cu-Lys self-assembled layer by layer; Gs / Lys-Cu-Lys Disperse in 150mL of secondary water, add 0.6g disodium ethylenediaminetetraacetate at room temperature, and react for 10 hours to remove copper ions; produce filtrate, wash repeatedly, and dry to obtain Gs / Lys...

Embodiment 3

[0041] 1. the preparation of graphite oxide: with embodiment 1

[0042] 2. the preparation of copper lysine: with embodiment 1

[0043] ③Preparation of graphene / copper lysine nanocomposites: Disperse 0.1 g of graphite oxide in a round-bottomed flask filled with 150 mL of secondary water and sonicate for 1.5 h to obtain a uniformly dispersed graphite oxide suspension. After adding 0.4 g of copper lysine and stirring for 15 min, the pH was adjusted to 9-10 with concentrated NaOH solution, and the reaction was stirred and refluxed at 90° C. for 26 h. Add 1.2g NaBH 4 As a reducing agent, stir and reflux at 90°C for 2.5 hours, filter the product, wash repeatedly with distilled water, and dry to obtain a nanocomposite of Gs / Lys-Cu-Lys self-assembled layer by layer; Gs / Lys-Cu-Lys Disperse in 150mL secondary water, add 1.2g disodium edetate at room temperature, and react for 14 hours to remove copper ions; produce filtrate, after repeated washing, dry to obtain Gs / Lys nanocomposite ...

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Abstract

The invention provides a graphene / lysine nano composite material and a preparation method thereof, belonging to the technical field of composite materials. The preparation method comprises the following steps: first reacting with epoxide group of graphite oxide by using small steric hindrance of amino group of copper lysine, then reducing the graphite oxide to obtain a layer upon layer self-assembled Gs / Lys-Cu-Lys nano composite material, and then removing copper ions to obtain a functional Gs / Lys nano composite material. The prepared nano composite material has good water-solubility and biocompatibility, solves the problems of difficult uniform dispersing and even severe agglomeration of graphene materials in an aqueous solution in the prior art, greatly extends the application filed of graphene. The nano composite material belongs to an environment friendly material, can be applied in sensors, cell marking, super capacitors, and bio-medicines, and can be used for further synthesizing functional nano composite materials.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a lysine nanocomposite material, in particular to a preparation method of a graphene / lysine nanocomposite material. Background technique [0002] Since the discovery of graphene, it has caused an upsurge of research all over the world. So far, graphene has been found to have many peculiar properties in terms of light, electricity, and magnetism. it is made by sp 2 A two-dimensional hexagonal crystal composed of hybridized carbon, which is the thinnest, hardest, and best conductive material known so far, can be used to prepare electrodes, composite materials, batteries, supercapacitors, Hydrogen storage materials, field emission materials and ultra-sensitive sensing materials, etc. Due to its outstanding performance and low cost, it is also suitable for the preparation of high-performance functional composite materials. However, graphene is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00B82Y40/00
Inventor 莫尊理缑浩何静娴冯超郭瑞斌
Owner NORTHWEST NORMAL UNIVERSITY
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