A kind of amino-terminated modified graphene oxide and its epoxy nanocomposite material

A technology on the surface of oxidized stone and graphene, which is applied in the direction of carbon compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of high heat distortion temperature, difficult synthesis of TLCP, difficult processing, etc.

CN111303486BActive Publication Date: 2021-06-25SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-06-25

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Abstract

The invention relates to an amino-terminated modified graphene oxide and an epoxy nanocomposite material thereof. Specifically discloses a modified graphene oxide, which is obtained by replacing the -OH group on the carboxyl group on the surface of graphene oxide with an A group. The structure of the A group is as follows; Graphene oxide is used as a raw material to prepare epoxy nanocomposites. The amino-terminated modified graphene oxide prepared by the present invention can greatly improve the storage modulus and glass transition temperature of the epoxy nanocomposite material under low addition, and improve the rigidity and heat resistance of the composite material , and at the same time can significantly improve the mechanical properties, especially the tensile properties, with excellent comprehensive properties and excellent application prospects.
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Description

technical field

[0001] The invention belongs to the field of polymer composite materials, and in particular relates to an amino-terminated modified graphene oxide and an epoxy nanocomposite material thereof. Background technique

[0002] As an important thermosetting resin, epoxy resin has excellent physical and mechanical properties, electrical insulation, chemical corrosion resistance, heat resistance and adhesive properties and excellent molding process, and is widely used in chemical industry, automobile, electronics, Mechanical and aerospace fields. With the rapid development of modern material science and technology, higher and higher requirements are put forward for epoxy resin, and its development trend is developing in the direction of multi-functionality, refinement and high performance. Among them, epoxy resin, as one of the most important high-performance composite material matrix resins, has extremely important application value in the aerospace field, and its ...

Examples

Embodiment 1

[0041] Embodiment 1, the preparation of modified graphene oxide of the present invention

[0042] (1) Preparation of intermediate product 1 (C-GO)

[0043] Weigh 1 g of graphene oxide (GO, C / O molar ratio (6.9-7.1): 3, purchased from Beijing Carbon Century Technology Co., Ltd.), and ultrasonically disperse the cells in 300 mL of dry dimethylformamide (DMF). , the dispersed GO suspension was added to a 1000mL three-necked flask, and 4,4'-diaminodicyclohexylmethane (PACM), dimethylepoxypyridine (DMAP) and N,N-bicyclohexyl Hexylcarbodiimide (DCC), and ensure that m(GO):n(PACM):n(DMAP):n(DCC) is 1g:30mmol:10mmol:10mmol. The mixture was reacted at 90°C for 24 hours. After the reaction was completed, it was cooled to room temperature, filtered under reduced pressure using a 0.45 μm polytetrafluoroethylene filter, and washed 5 times with DMF to remove unreacted 4,4'-di Aminodicyclohexylmethane, catalyst, to obtain intermediate product 1 (C-GO).

[0044] (2) Preparation of intermed...

Embodiment 2

[0048] Embodiment 2, the preparation of modified graphene oxide / epoxy nanocomposite material (C-P-M-GO / EP) of the present invention

[0049] According to the formula shown in Table 1, weigh the modified graphene oxide C-P-M-GO, 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.), and the solvent was removed by mechanical stirring at 65°C. Weigh 4,4' diaminodiphenylmethane (DDM) and 3,5-diethyl-2,4 toluenediamine (DETDA) mixed curing agent, add modified graphene oxide / TDE-85 epoxy resin In the mixed solution, electric stirring at a constant speed for 15 minutes, so that the curing agent and the resin are fully mixed. The obtained mixture was placed in a vacuum drying oven and dried in vacuum for 30 min to remove the air bubbles introduced during the stirring process. Finally, pour the vacuum-dri...