Graphene nano composite material with dual intelligent responsivities

A nanocomposite material and graphene technology, which is applied in the field of graphene nanocomposite materials and its preparation, can solve problems such as easy agglomeration and graphene application limitations, and achieve the effect of good dispersion and intelligent responsiveness

Inactive Publication Date: 2016-08-17
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are strong van der Waals forces and π-π interactions between the graphene sheet structures, and the reduction process is extremely prone to agglomeration, which limits the application of graphene in many aspects.

Method used

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  • Graphene nano composite material with dual intelligent responsivities
  • Graphene nano composite material with dual intelligent responsivities
  • Graphene nano composite material with dual intelligent responsivities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 (purification of N-isopropylacrylamide)

[0037] Weigh 5.0013g of NIPAM (N-isopropylacrylamide) monomer into a 100ml two-necked round-bottomed flask, heat and drop acetone until NIPAM is completely dissolved, cool to reflux, add dropwise n-hexane, the added acetone and n-hexane The amount of its volume ratio is about 1:6, stop heating. After the product is cooled to room temperature, transfer it to the refrigerator, cool and precipitate crystals, place it in the upper layer of the refrigerator at 5°C for 10 hours, and transfer it to the lower layer of the refrigerator at -15°C for 20 hours. After the crystals were precipitated, they were taken out for suction filtration and washed with n-hexane. Store in a desiccator after vacuum drying at room temperature.

Embodiment 2

[0038] Embodiment 2 (ionic liquid 1-vinyl-3-ethylimidazolium bromide (ViEtIm + Br - )Synthesis)

[0039]Measure 6.0mL of 1-vinylimidazole and 8.5mL of ethyl bromide respectively, add them to a 100mL round bottom flask in turn, heat to reflux for reaction, and set the reaction temperature of the oil bath to 70°C. After 1 hour of reaction, white turbidity appeared, and the reaction was continued until the turbidity disappeared, and the reactant became solid. Continue the reflux reaction for 10h, and stop heating when the reflux is not obvious. The reactant was poured into a beaker, recrystallized three times with acetonitrile-ethyl acetate, and dried in vacuo to obtain a yellow-white solid powder.

[0040]

Embodiment 3

[0041] Embodiment 3 (preparation and characterization of graphene oxide GO)

[0042] Add 67.5mL of concentrated sulfuric acid to the three-necked round-bottomed flask, place it in an ice-water bath, then add 2.0005g of high-purity graphite and 1.5878g of NaNO to the round-bottomed flask 3 , after stirring well, slowly add 9.0037g of solid KMnO 4 , During the process of adding medicines, keep the temperature in the round bottom flask always controlled below 5°C, and then react at 32-38°C for 30 minutes. When the reaction was nearing the end, the black suspension turned into a taupe viscous substance, which was left at room temperature for 7 days. Finally, dilute with 560.0mL of hot water and add 3% H 2 o 2 Restore the remaining high-valent manganese ions until the solution turns bright yellow. Wash GO by centrifugation (10000rpm, 10min), first wash the GO solution with 0.01M NaOH until neutral, then wash with water to wash off excess SO4 2- , tested with saturated barium a...

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Abstract

The invention discloses a graphene nano composite material with dual intelligent responsivities. The graphene nano composite material is the polymer poly-RGO (reduced graphene oxide). The preparation method comprises the following steps: under the action of an azodiisobutyronitrile thermal initiator, carrying out polymerization on an ion monomer 1-vinyl-3-ethyl imidazole bromide and an N-isopropyl acrylamide monomer by using methanol as a reflux solvent to generate the polymer poly; and preparing the end polymerisate poly-RGO under the pi-pi non-covalent modification action between the graphene and ionic liquid. The graphene nano composite material prepared by the method has favorable dispersity, and is endowed with the dual intelligent responsivities of temperature sensitiveness and ionicity when the graphene reaches higher reduced state; and thus, the graphene composite material has certain environment responsivity on the basis of enhancing the original basic properties, thereby widening the applicability of the graphene nano composite material in the fields of biological transduction, electronic devices, separation purification and the like.

Description

technical field [0001] The invention relates to the field of nanocomposite materials, in particular to a graphene nanocomposite material with dual intelligent responsiveness and its preparation. Background technique [0002] Graphene is a new carbonaceous material in which carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. It is the thinnest two-dimensional material discovered so far. As we all know, graphene has excellent properties such as strong electrical conductivity, good biocompatibility and good chemical stability, and is widely used in the fields of electrochemistry and material science. [0003] However, there are strong van der Waals forces and π-π interactions between graphene sheet structures, and agglomeration easily occurs during the reduction process, which limits the application of graphene in many aspects. Combining graphene with other materials with good water solubility to prepare nanocomposites can well solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/24C08K9/02C08K3/04C08F220/54C08F226/06
CPCC08K9/02C08F220/54C08K3/04C08K2201/011
Inventor 张谦张俊慧夏立新魏志超
Owner LIAONING UNIVERSITY
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