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A flexible long-chain polyamine-based polyetheramine modified carboxylated graphene oxide and its epoxy nanocomposite

A chain polyamine-based polyetheramine and composite material technology, which is applied in the field of polymer composite materials, can solve the problems that the mechanical properties of composite materials need to be further improved, the compatibility and interface bonding strength are insufficient, and the advantages of graphene cannot be fully utilized. , to achieve the effect of improving the mechanical properties, improving significantly, and having excellent application prospects

Active Publication Date: 2021-04-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the graphene oxide / resin-based composite materials currently prepared, due to the lack of compatibility and interfacial bonding strength between graphene oxide and resin base, the advantages of graphene cannot be fully utilized, and the mechanical properties of the composite materials need to be further improved.

Method used

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  • A flexible long-chain polyamine-based polyetheramine modified carboxylated graphene oxide and its epoxy nanocomposite
  • A flexible long-chain polyamine-based polyetheramine modified carboxylated graphene oxide and its epoxy nanocomposite
  • A flexible long-chain polyamine-based polyetheramine modified carboxylated graphene oxide and its epoxy nanocomposite

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Embodiment 1

[0040] Example 1. Preparation of flexible long-chain polyamine-based polyetheramine modified carboxylated graphene oxide of the present invention

[0041] according to figure 1 The synthetic route shown is to synthesize the flexible long-chain polyamine polyetheramine modified carboxylated graphene oxide (GO-COOH-T5000) of the present invention.

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

[0043] Weigh 0.6g GO (C / O molar ratio (6.9-7.1): 3, purchased from Beijing Carbon Century Technology Co., Ltd.) and ultrasonically disperse it in 120mL of dimethylacetamide, add it to a 150mL three-necked flask, and heat at 75°C Constant temperature reaction 72h. After the reaction, cool to room temperature, use a 0.45 μm polytetrafluoroethylene filter membrane to filter under reduced pressure, wash repeatedly with dimethylacetamide to remove impurities, store in a frozen wet state and calculate the solid content, and name the obtained carboxylated GO for GO-COOH.

[0044]W...

Embodiment 2

[0047] Embodiment 2, flexible chain polyaminopolyetheramine modified carboxylated graphene oxide / epoxy nanocomposite material of the present invention

[0048] Preparation of (GO-COOH-T5000 / EP)

[0049] According to the formula shown in Table 1, weigh the modified graphene oxide GO-COOH-T5000, ultrasonically disperse it in the acetone solution at a ratio of 1:1 mg / mL, and add 70 g of TDE-85 ring Oxygen resin (purchased from Hubei Xinrunde Chemical Co., Ltd.), mechanically stirred at 65°C for 14h to remove the solvent. Put the obtained modified graphene oxide / TDE-85 epoxy resin mixture into a vacuum oven, and dry it under vacuum at 65°C until no bubbles are generated in the mixture, so as to remove the residual solvent. Weigh 4,4'-diaminodiphenylmethane (DDM) and 3,5-diethyl-2,4 toluenediamine (DETDA) mixed curing agent to melt, add modified graphene oxide / TDE-80 epoxy In the resin mixture, stir at a constant speed to fully mix the curing agent and resin. The resulting mixtu...

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Abstract

The invention provides flexible long-chain polyamine polyetheramine modified carboxylated graphene oxide. Through further preparation, an epoxy nanocomposite material system thereof is obtained. Withlow dosage of the polyetheramine modified carboxylated graphene oxide rich in flexible-chain amino group on the surface, mechanical property of the epoxy nanocomposite material can be greatly improved, especially toughness (elongation at break) and compression performance are remarkably improved. The product of the invention has an important application prospect.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a flexible long-chain polyamine-based polyetheramine modified carboxylated 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 compounding of small-sized nanoscale dispersed phases and resin bases. Due to the unique thermodynamic 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 properti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K3/04C08L63/00
Inventor 邹华维张雪琴梁梅陈洋
Owner SICHUAN UNIV
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