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Preparation method of carbon nanotube-montmorillonoid self-assembled nano powder grafting 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 , The effect of simple preparation process

Active Publication Date: 2017-12-29
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-montmorillonoid self-assembled nano powder grafting glass fiber reinforced resin composite material
  • Preparation method of carbon nanotube-montmorillonoid self-assembled nano powder grafting glass fiber reinforced resin composite material
  • Preparation method of carbon nanotube-montmorillonoid self-assembled nano powder grafting glass fiber reinforced resin composite material

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Embodiment 1

[0032] A method for preparing a 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 them to 0.02L of N,N'-dimethylformamide solvent, then add 0.005g of N,N'-diisopropyl Carbodiimide and 1-hydroxybenzotriazole were stirred for 5 minutes and ultrasonicated for 30 minutes to obtain a 10 g / L carbon nanotube dispersion, which was magnetically stirred at a speed of 200 r / min; weighed 0.01 g of diethylene Triamine was added to the carbon nanotube dispersion, and after reacting at room temperature for 24 hours, it was washed twice with deionized water and washed with alcohol, and then filtered to obtain diethylenetriamine-modified carbon nanotubes;

[0034] (2) Preparation of carbon nanotube ammonium salt: the carbon nanotube modified by diethylenetriamine in step (1) was stirred in 0.02L deion...

Embodiment 2

[0040] A kind of carbon nanotube-montmorillonite self-assembled nanopowder and preparation method thereof, its place differs from embodiment 1 in that the carboxyl carbon nanotube described in step (1) becomes 1g, and described N, N' -Diisopropylcarbodiimide and 1-hydroxybenzotriazole become 0.02g respectively, and described organic amine becomes 0.2g triethylenetetramine; The solution pH value described in step (2) is adjusted to 4; in step (3), 10g montmorillonite is added to 100mL deionized water, stirred at 1000r / min for 3h, ultrasonic 1h; carbon nanotube ammonium salt is stirred at 800r / min in the montmorillonite suspension, and Continue to stir for 5h; the silane coupling agent described in step (4) becomes 0.03g of 3-(2,3-epoxypropoxy)propyltriethoxysilane, and adjust the pH of the silane coupling agent solution with acetic acid to 4.0; the quality of the nano-powder is changed to 3g; the composite material molding process in step (5) is changed to a vacuum-assisted res...

Embodiment 3

[0043]A carbon nanotube-montmorillonite self-assembled nanopowder and a preparation method thereof, which differ from Example 1 in that the carboxyl carbon nanotubes described in step (1) become 1g, and the aprotic organic solvent Become carbon tetrachloride, described dehydration condensation agent becomes ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxyl succinimide (NHS), Described organic amine becomes 0.05g tetraethylene pentamine; Solution pH value is adjusted to 3.5 with hydrochloric acid in step (2), and described rotating speed is adjusted to 600r / min; Montmorillonite quality described in step (3) changes 5g, the cation exchange capacity of montmorillonite becomes 100mmol / 100g, and the stirring speed of the carbon nanotube ammonium salt in the montmorillonite suspension is 600r / min. The silane coupling agent described in the step (4) becomes N-(2-aminoethyl)-3-aminopropyltriethoxysilane; the described glass fiber material is that the surfac...

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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 in particular relates to a preparation method of carbon nanotube-montmorillonite self-assembled nanopowder 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 due to their excellent properties such as high strength, high modulus, good formability and fatigue damage resistance. The properties of fiber-reinforced composites not only depend on the properties of fibers and resin matrix, but also largely depend on the strength of interfacial bonding. In order to improve the interfacial adhesion of conventional glass fiber reinforced composites, surface modification of glass fibers is usually required. However, surface modifications such as traditional organic modification and surface etching can only improv...

Claims

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Application Information

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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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