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Monofunctional polyether amine modified oxidized graphene/epoxy resin nanometer composite material with high strength and high tenacity

A technology of epoxy resin and composite material, applied in the field of epoxy resin composite material, which can solve problems such as incompatibility

Active Publication Date: 2019-03-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the large number of hydrophilic groups on the surface of graphene oxide, it is incompatible with most water-insoluble polymers.

Method used

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  • Monofunctional polyether amine modified oxidized graphene/epoxy resin nanometer composite material with high strength and high tenacity
  • Monofunctional polyether amine modified oxidized graphene/epoxy resin nanometer composite material with high strength and high tenacity
  • Monofunctional polyether amine modified oxidized graphene/epoxy resin nanometer composite material with high strength and high tenacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 Preparation of Monofunctional Polyetheramine Modified Graphene Oxide M1-GO

[0047]

[0048] (1) Preparation of GO solution

[0049] At 15-35°C, add 0.3g graphene oxide (GO) into a 500mL round bottom flask, add 300mL dimethylformamide (DMF), that is, the dispersion concentration of GO is 1mg / mL, and use a cell disruptor to sonicate for 30min. A homogeneous solution was obtained.

[0050] (2) Preparation of M1-GO

[0051] Slowly add monofunctional polyetheramine (M1), dimethylaminopyridine (DMAP), and dicyclohexylcarboimide (DCC) to the GO solution in sequence to ensure m(GO):n(M1):n(DMAP) :n(DCC)=0.3g:9mmol:3mmol:3mmol. The mixture was reacted at 90°C for 24 hours. After the reaction, it was filtered under reduced pressure using a 0.2 μm tetrafluoroethylene microporous membrane, and the unreacted monofunctional polyetheramine, catalyst, and DMF solvent were washed away with ethanol to obtain The wet solid was frozen and stored, and the solid content was...

Embodiment 2

[0052] Example 2 Preparation of Monofunctional Polyetheramine Modified Graphene Oxide M2-GO

[0053] (1) Preparation of GO solution

[0054] At 15-35°C, add 0.3g of graphene oxide (GO) into a 500mL round bottom flask, add 300mL of dimethylformamide (DMF), that is, the dispersion concentration of GO is 1mg / mL, and use a cell disruptor to sonicate for 30min , to obtain a homogeneous solution.

[0055] (2) Preparation of M2-GO

[0056] Slowly add monofunctional polyetheramine (M2), dimethylaminopyridine (DMAP), and dicyclohexylcarboimide (DCC) to the GO solution in sequence to ensure m(GO):n(M2):n(DMAP) :n(DCC)=0.3g:9mmol:3mmol:3mmol. The mixed solution was reacted at 90°C for 24 hours. After the reaction, it was filtered under reduced pressure using a 0.2 μm tetrafluoroethylene microporous filter membrane, and the unreacted monofunctional polyetheramine, catalyst, and DMF solvent were washed away with ethanol to obtain wet solid state, and freeze it for calculation of solid ...

Embodiment 3

[0057] Preparation of Example 3 Nanocomposite M1-GO / EP

[0058] The preparation process of the nanocomposite material of the present invention is as follows figure 1 shown.

[0059] Weighing in proportion, 0.025 parts / 0.05 parts / 0.1 parts / 0.2 parts correspond to 12.5 / 25 / 50 / 100 mg of functionalized graphene oxide M1-GO respectively, dispersed in acetone solution at a ratio of 1 mg / mL, 15 to 35 At ℃, use a cell smasher to sonicate for 30 minutes, then add 50g of epoxy resin to the acetone solution of functionalized graphene oxide, adjust the temperature of the oil bath to 65℃, continue electric stirring for 5h, remove the solvent, and then put it in a vacuum at 70℃ Oven for 5h to remove residual solvent to obtain 50g of M1-GO / EP mixture.

[0060] At 90-120°C, add 50 g of the M1-GO / EP mixture prepared above into a beaker containing 12.5 g of curing agent DDM (4,4-diaminodiphenylmethane), continue stirring for 15 minutes and stop, and take out the beaker.

[0061] Then place th...

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Abstract

The invention discloses a monofunctional polyether amine modified oxidized graphene / epoxy resin nanometer composite material with high strength and high tenacity. The monofunctional polyether amine modified oxidized graphene / epoxy resin nanometer composite material is prepared from the following raw materials: monofunctional polyether amine modified oxidized graphene and epoxy resin, wherein the mass ratio of monofunctional polyether amine modified oxidized graphene to epoxy resin is (0.01 to 3):100; the monofunctional polyether amine modified oxidized graphene is prepared from the following raw materials: oxidized graphene, monofunctional polyether amine, dimethylaminopyridine and dicyclohexylcarbodiimide, wherein the proportion of oxidized graphene to monofunctional polyether amine to dimethylaminopyridine to dicyclohexylcarbodiimide is 1:(25 to 35):(5 to 15):(5 to 15) g / mmol / momol / momol. According to the monofunctional polyether amine modified oxidized graphene / epoxy resin nanometercomposite material, the tensile strength is improved by 29%, the elongation at break is improved by 77.9%, and the bending strength is improved by 28.5%.

Description

technical field [0001] The invention relates to a monofunctional polyetheramine modified graphene oxide, an epoxy resin composite material containing the monofunctional polyetheramine modified graphene oxide, and a preparation method thereof. Background technique [0002] Graphene is an ideal inorganic filler for the preparation of polymer nanocomposites due to its excellent mechanical, electrical and thermal properties. However, the surface of graphene is inert and does not contain any active groups, so the force between it and the polymer matrix is ​​very small, which also causes certain difficulties in processing. Since the surface of graphene oxide is rich in carboxyl groups, hydroxyl groups, and epoxy groups, graphene can be modified by various chemical reactions using these active groups as reaction points. Therefore, using graphene oxide as a precursor to prepare covalent Modified graphene is currently the most commonly used method. [0003] However, due to the larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/04C08K3/04
CPCC08K9/08C08K2201/011C08K3/042C08L63/00
Inventor 邹华维陈洋周娅闫丽伟梁梅
Owner SICHUAN UNIV