Polyetheramine-modified graphene oxide and epoxy composite nano-material thereof

Abstract

The present invention provides a polyaminopolyetheramine-modified graphene oxide. The polyaminopolyetheramine-modified graphene oxide is obtained by substituting -OH groups in carboxyl groups on the surface of graphene oxide with A groups. A polyaminopolyetheramine-modified graphene oxide / TDE-85 epoxy composite nano-material system is further prepared. The polyaminopolyetheramine-modified grapheneoxide can effectively improve the mechanical properties of epoxy resin; and the composite material has optimum mechanical properties with a graft amount especially at a ratio of m(GO):n(T5000) of 1:7, and has a good application prospect.

Description

technical field

[0001] The invention belongs to the field of polymer composite materials, in particular to a polyetheramine modified graphene oxide and epoxy nanocomposite materials thereof. Background technique

[0002] Epoxy resin (EP) is an excellent high-strength thermosetting resin and is a widely used matrix material. However, pure epoxy resin is difficult to meet the use requirements in practical applications, so its application is limited to a certain extent.

[0003] Resin-based nanocomposites refer to the composite of small-sized nanoscale dispersed phases and resin bases. Due to the unique mechanical properties, large specific surface area and strong surface activity of doped phase nanoparticles, such nanoparticles are dispersed After being in the resin matrix, it can have a strong interaction with the matrix on a microscopic scale, thereby improving the strength, heat resistance and other properties of the composite material with a small amount of addition. [...

Examples

Embodiment 1

[0034] Embodiment 1, the preparation of polyetheramine modified graphene oxide of the present invention

[0035] according to figure 1 The synthetic route shown is to synthesize the polyetheramine-modified graphene oxide (GO-T5000) of the present invention.

[0036] Weigh 0.5g GO (C / O molar ratio is (6.9-7.1): 3, purchased from Beijing Carbon Century Technology Co., Ltd.) and ultrasonically disperse the cells in 500mL dimethylacetamide (DMAC). The suspension was added to a 1000mL three-necked flask, and dimethylaminopyridine (DMAP) and N, N-dicyclohexylcarbodiimide (DCC) were added in sequence, and m(GO):n(DMAP):n( DCC) is 0.5g:5mmol:5mmol. Add polyetheramine T5000 in different proportions (m(GO):n(T5000)=(1:3-1:11) (T5000 was purchased from Shanghai Jingchun Biochemical Technology Co., Ltd.), and stir at a constant speed for 24 hours at 90°C , After the reaction is completed and cooled to room temperature, use a 0.45 μm polytetrafluoroethylene filter membrane to filter und...

Embodiment 2

[0037] Example 2, Preparation of Polyetheramine Modified Graphene Oxide / Epoxy Nanocomposite Material (GO-T5000 / EP) of the present invention

[0038] According to the formula shown in Table 1, weigh the modified graphene oxide GO-T5000, ultrasonically disperse it in the acetone solution at a ratio of 1:1 mg / mL, and add 70 g of TDE-85 epoxy resin to the solution uniformly dispersed after ultrasonic (purchased from Tianjin Jingdong Chemical Composite Material Co., Ltd.), mechanically stirred at 65°C for 14h to remove the solvent. The obtained modified graphene oxide / TDE-85 epoxy resin mixed solution was put into a vacuum oven and dried in vacuum at 65°C until no bubbles were produced in the mixed solution to remove residual solvent. Weigh 4'diaminodiphenylmethane (DDM) and 3,5-diethyl-2,4 toluenediamine (DETDA) mixed curing agent to melt, add modified graphene oxide / TDE-85 epoxy resin mixture In the middle, electric constant speed stirring, so that the curing agent and resin are...

technical field

[0001] The invention belongs to the field of polymer composite materials, in particular to a polyetheramine modified graphene oxide and epoxy nanocomposite materials thereof. Background technique

[0002] Epoxy resin (EP) is an excellent high-strength thermosetting resin and is a widely used matrix material. However, pure epoxy resin is difficult to meet the use requirements in practical applications, so its application is limited to a certain extent.

[0003] Resin-based nanocomposites refer to the composite of small-sized nanoscale dispersed phases and resin bases. Due to the unique mechanical properties, large specific surface area and strong surface activity of doped phase nanoparticles, such nanoparticles are dispersed After being in the resin matrix, it can have a strong interaction with the matrix on a microscopic scale, thereby improving the strength, heat resistance and other properties of the composite material with a small amount of addition. [...

Examples

Embodiment 1

[0034] Embodiment 1, the preparation of polyetheramine modified graphene oxide of the present invention

[0035] according to figure 1 The synthetic route shown is to synthesize the polyetheramine-modified graphene oxide (GO-T5000) of the present invention.

[0036] Weigh 0.5g GO (C / O molar ratio is (6.9-7.1): 3, purchased from Beijing Carbon Century Technology Co., Ltd.) and ultrasonically disperse the cells in 500mL dimethylacetamide (DMAC). The suspension was added to a 1000mL three-necked flask, and dimethylaminopyridine (DMAP) and N, N-dicyclohexylcarbodiimide (DCC) were added in sequence, and m(GO):n(DMAP):n( DCC) is 0.5g:5mmol:5mmol. Add polyetheramine T5000 in different proportions (m(GO):n(T5000)=(1:3-1:11) (T5000 was purchased from Shanghai Jingchun Biochemical Technology Co., Ltd.), and stir at a constant speed for 24 hours at 90°C , After the reaction is completed and cooled to room temperature, use a 0.45 μm polytetrafluoroethylene filter membrane to filter und...

Embodiment 2

[0037] Example 2, Preparation of Polyetheramine Modified Graphene Oxide / Epoxy Nanocomposite Material (GO-T5000 / EP) of the present invention

[0038] According to the formula shown in Table 1, weigh the modified graphene oxide GO-T5000, ultrasonically disperse it in the acetone solution at a ratio of 1:1 mg / mL, and add 70 g of TDE-85 epoxy resin to the solution uniformly dispersed after ultrasonic (purchased from Tianjin Jingdong Chemical Composite Material Co., Ltd.), mechanically stirred at 65°C for 14h to remove the solvent. The obtained modified graphene oxide / TDE-85 epoxy resin mixed solution was put into a vacuum oven and dried in vacuum at 65°C until no bubbles were produced in the mixed solution to remove residual solvent. Weigh 4'diaminodiphenylmethane (DDM) and 3,5-diethyl-2,4 toluenediamine (DETDA) mixed curing agent to melt, add modified graphene oxide / TDE-85 epoxy resin mixture In the middle, electric constant speed stirring, so that the curing agent and resin are...

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