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Preparation method of carbon nanotube-montmorillonite self-assembled nanopowder grafted glass fiber reinforced resin composite material

A technology of carbon nanotubes and glass fibers, which is applied in the field of fiber-reinforced polymer composite materials, can solve the problems of uneven dispersion of nanofillers, uneven distribution of CNTs at the injection port and the exit port, etc., so as to increase the layer spacing and avoid easy winding , Improve the effect of interface adhesion

Active Publication Date: 2020-02-18
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not been reported that the CNTs-MMT nanocomposites are pre-dispersed in the resin to prepare fiber composites.
[0004] In addition, when using resin transfer molding, vacuum-assisted resin infusion and other resin transfer molding processes to prepare fiber composites, nanofillers often appear to be blocked or filtered by fiber fabrics and unevenly dispersed.
For example, Elisabete et al[Elisabete F.,Reiada Costa.RTM processing and electrical performance of carbon nanotube modified epoxy / fibre composites[J].Composites Part A,2012,43(4):593-602.] found that vacuum-assisted resin transfer In the process of preparing composite materials by molding process, there is a phenomenon of uneven distribution of CNTs at the injection port and the exit port
The mixed fillers of MMT and CNTs cannot avoid the above problems in the resin

Method used

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  • Preparation method of carbon nanotube-montmorillonite self-assembled nanopowder grafted glass fiber reinforced resin composite material
  • Preparation method of carbon nanotube-montmorillonite self-assembled nanopowder grafted glass fiber reinforced resin composite material
  • Preparation method of carbon nanotube-montmorillonite self-assembled nanopowder grafted glass fiber reinforced resin composite material

Examples

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Effect test

Embodiment 1

[0032] A preparation method of carbon nanotube-montmorillonite self-assembled nano-powder grafted glass fiber reinforced composite material, the specific steps are as follows:

[0033] (1) Aminated carbon nanotubes: Weigh 0.2g of carboxyl multi-walled carbon nanotubes and add 0.02L of N,N'-dimethylformamide solvent, and then add 0.005g of N,N'-diisopropyl Carbodiimide and 1-hydroxybenzotriazole were stirred for 5 min and ultrasonic for 30 min to obtain a 10g / L carbon nanotube dispersion, which was stirred magnetically at a speed of 200r / min; weighed 0.01g diethylene Triamine was added to the carbon nanotube dispersion liquid, reacted at room temperature for 24 hours, washed with deionized water and washed with alcohol twice, and then filtered to obtain diethylenetriamine modified carbon nanotubes;

[0034] (2) Preparation of carbon nanotube ammonium salt: the carbon nanotubes modified by diethylenetriamine in step (1) are stirred in 0.02L of deionized water for 5 minutes and ultras...

Embodiment 2

[0040] A carbon nanotube-montmorillonite self-assembled nanopowder and a preparation method thereof. The difference from Example 1 is that the carboxyl carbon nanotubes in step (1) are changed to 1g, and the N, N' -Diisopropylcarbodiimide and 1-hydroxybenzotriazole were changed to 0.02g, and the organic amine was changed to 0.2g triethylenetetramine; the pH of the solution in step (2) was adjusted to 4; In step (3), add 10g of montmorillonite to 100mL of deionized water, stir at 1000r / min for 3h, and ultrasonic for 1h; the stirring speed of carbon nanotube ammonium salt in the montmorillonite suspension is 800r / min, and Continue stirring for 5 hours; the silane coupling agent described in step (4) becomes 0.03g of 3-(2,3-glycidoxy)propyltriethoxysilane, and the pH of the silane coupling agent solution is adjusted with acetic acid To 4.0; the mass of nano powder is changed to 3g; in step (5), the composite material molding process is changed to a vacuum assisted resin transfer m...

Embodiment 3

[0043] A carbon nanotube-montmorillonite self-assembled nanopowder and a preparation method thereof. The difference from Example 1 is that the carboxyl carbon nanotubes in step (1) are changed to 1 g, and the aprotic organic solvent It becomes carbon tetrachloride, and the dehydrating condensing agent becomes ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS), The organic amine becomes 0.05g tetraethylenepentamine; the pH value of the solution in step (2) is adjusted to 3.5 with hydrochloric acid, and the rotation speed is adjusted to 600r / min; the quality of montmorillonite in step (3) is changed The cation exchange capacity of the montmorillonite becomes 100 mmol / 100g, and the stirring speed of the ammonium salt of carbon nanotubes in the montmorillonite suspension is 600 r / min. The silane coupling agent described in step (4) becomes N-(2-aminoethyl)-3-aminopropyltriethoxysilane; the glass fiber material has an areal density of 400g / ...

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Abstract

The invention discloses a preparation method of a carbon nanotube-montmorillonoid self-assembled nano powder grafting glass fiber reinforced resin composite material. The preparation method comprises the following steps: dispersing a carbon nanotube in aprotic solvent, modifying by virtue of organic amine, performing hydrochloric acid salt forming reaction, and obtaining carbon nanotube ammonium salt; ultrasonically dispersing the montmorillonoid and carbon nanotube ammonium salt in the water, filtering, repeatedly washing, spraying and drying to obtain carbon naontube-montmorillonoid self-assembled nano powder; ultrasonically dispersing the nano powder in a silane coupling agent solution, uniformly spraying on the surface of glass fibers, an vacuum drying to obtain nano powder grafting glass fiber prefabricated body; and compounding the prefabricated body with resin by virtue of a composite material forming process, thus obtaining the carbon nanotube-montmorillonoid self-assembled nano powder grafting glass fiber reinforced resin composite material. By adopting the preparation method, the dispersity of the carbon nanotube can be effectively improved, and the interlayer distance of the montmorillonoid can be increased; and the nano powder is grafted to the glass fibers, so that the dispersity in the composite material can be further improved, the interface adhesion between the resin and the fibers can be improved, and the mechanical performance and heat resistance of the fiber composite material can be improved.

Description

Technical field [0001] The invention belongs to the technical field of fiber-reinforced polymer composite materials, and specifically relates to a method for preparing a carbon nanotube-montmorillonite self-assembled nano-powder grafted glass fiber-reinforced resin composite material. Background technique [0002] Glass fiber reinforced composite materials are widely used in aviation, transportation, new energy and many other fields with their own high strength, high modulus, good formability and fatigue resistance. The performance of fiber-reinforced composite materials not only depends on the performance of the fiber and the resin matrix, but also largely depends on the strength of the interface bond. In order to improve the interfacial adhesion of traditional glass fiber reinforced composite materials, it is usually necessary to modify the surface of the glass fiber. However, traditional organic modification, surface etching and other surface modification can only improve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L75/04C08L67/06C08L63/10C08L79/08C08K9/06C08K9/02C08K7/14C08K7/00
CPCC08K7/00C08K7/14C08K9/02C08K9/06C08K2201/011C08L63/00C08L75/04C08L67/06C08L63/10C08L79/085
Inventor 申明霞曾少华薛逸娇李佳骐陆凤玲陈尚能朱泽元
Owner HOHAI UNIV
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