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Modified carbon nanotube reinforced shape memory epoxy resin composite material and preparation method thereof

An epoxy resin and composite material technology, applied in the field of composite materials, can solve the problems of insufficient stability of the combination of nano materials and epoxy resin matrix, and achieve the effects of excellent mechanical properties, improved mechanical properties, and enhanced interface bonding.

Active Publication Date: 2020-05-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the brittleness of the current shape-memory epoxy resin system itself and the problem that the combination of nanomaterials and epoxy resin matrix is ​​not stable enough, the present invention proposes a modified carbon nanotube-reinforced shape-memory epoxy resin composite material and its preparation method

Method used

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  • Modified carbon nanotube reinforced shape memory epoxy resin composite material and preparation method thereof
  • Modified carbon nanotube reinforced shape memory epoxy resin composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: Preparation of modified carbon nanotubes

[0047] (1) Grafting carboxyl groups on the surface of carbon nanotubes

[0048] 3 g of carbon nanotubes were added to a single-necked flask containing a mixed acid solution of 20 mL of concentrated nitric acid and 60 mL of concentrated sulfuric acid, and then the single-necked flask was placed in an ultrasonic separator and kept at 80 ° C for 6 h for acidification. After the reaction is completed, the mixed solution is centrifuged several times until the solution is neutral, and the obtained solution is dried to obtain a carbon nanotube solid powder with carboxyl groups on the surface.

[0049] (2) Epoxy groups grafted on the surface of carbon nanotubes

[0050] Add 10g of epoxy resin E-51 into a three-necked flask containing 50mL of N-N dimethylacetamide and stir until the solution is uniform, then add 3g of carboxy-modified carbon nanotube powder and 0.05g of triphenyl Base phosphine, keep the epoxidation reac...

Embodiment 2

[0053] After mixing 3.65g of epoxy resin E-51 quality, 1.72g of tetrakis(3-mercaptopropionate) pentaerythritol ester, 0.0054g of epoxy-modified carbon nanotubes, and 0.075g of catalyst 2-methylimidazole . Place the above-mentioned polymerized monomers and catalysts under -0.08MPa vacuum condition, and stir for 30min. Pour the well-stirred mixture into a polytetrafluoroethylene mold, and place it under vacuum conditions, react at 80°C for 3h, at 120°C for 2h, and at 150°C for 1h, after 24 hours of subsequent natural cooling treatment, the modified carbon was prepared. Nanotube-reinforced shape-memory epoxy resin composite PM-0.1.

Embodiment 3

[0055] After mixing 3.65g of epoxy resin E-51 quality, 1.72g of tetrakis (3-mercaptopropionic acid) pentaerythritol ester, 0.0108g of epoxy-modified carbon nanotubes, and 0.075g of catalyst 2-methylimidazole . Place the above-mentioned polymerized monomers and catalysts under -0.08MPa vacuum condition, and stir for 30min. Pour the well-stirred mixture into a polytetrafluoroethylene mold, and place it under vacuum conditions, react at 80°C for 3h, at 120°C for 2h, and at 150°C for 1h, after 24 hours of subsequent natural cooling treatment, the modified carbon was prepared. Nanotube-reinforced shape-memory epoxy resin composite PM-0.2.

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Abstract

The invention relates to a modified carbon nanotube reinforced shape memory epoxy resin composite material and a preparation method thereof. The composite material is prepared from the following raw materials: epoxy resin, a curing agent, a catalyst and modified carbon nanotubes, and the modified carbon nanotubes are carbon nanotube powder of which the surface is modified with epoxy groups. The invention also provides a preparation method of the modified carbon nanotube reinforced shape memory epoxy resin composite material. The method comprises the following steps: grafting carboxyl on the surface of the carbon nanotube, and then grafting an epoxy group; and uniformly mixing the modified carbon nanotubes, epoxy resin, a curing agent and a catalyst, and pouring the mixture into a mold forcuring. The modified carbon nanotube reinforced shape memory epoxy resin composite material provided by the invention shows good application performance in the aspects of mechanical strength, toughness, the shape memory performance and the like.

Description

technical field [0001] The invention relates to a modified carbon nanotube reinforced shape memory epoxy resin composite material and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] As a new generation of intelligent materials, shape memory polymers have gradually exerted their unique shape memory functions in various fields, such as safety seats, foldable sun panels, and automatic sutures. As one of the raw materials for the production of shape memory materials, epoxy resin stands out among many raw materials for its low price, good chemical resistance, and various processability, and has become the main research focus of manufacturers and researchers. Despite the many advantages of epoxy resin, the thermosetting shape memory polymer prepared from epoxy resin as a matrix has limited its applicable range due to its brittle characteristics. [0003] The commonly used method currently used to improve the bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/04C08K9/02C08K3/04C08J5/00
CPCC08J5/005C08J2363/00
Inventor 王彦玲汤龙皓梁雷刘斌巩锦程
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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