Preparation method for carbon nano-tube/epoxy resin high-performance composite material
A technology of epoxy resin and carbon nanotubes, applied in the field of materials, can solve the problems of reduction and the improvement of the mechanical properties of composite materials is not large, and achieve the effects of improving dispersibility, reducing agglomeration and improving mechanical properties.
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Embodiment 1
[0027] Step 1: Preparation of Aminated Carbon Nanotubes
[0028] Mix 0.2 g of purified carbon nanotubes with an average diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 30 g of ethylenediamine, and 5 g of N, N'-dicyclohexylcarbodiimide, and place them in an oil bath at 120 ° C. Heated to reflux for 36h. After the reaction is completed, wash off excess amine, N, N'-dicyclohexylcarbodiimide and other by-products under ultrasonic vibration with absolute ethanol, filter with a microporous membrane (0.45 μm in diameter), and repeat Wash 3 times. The filtered carbon tubes were dissolved in dichloromethane, the insoluble residue was filtered out, and the filtrate was collected and evaporated to dryness to obtain aminated multi-walled carbon nanotubes modified with ethylenediamine.
[0029] Step 2: Preparation of Aminated Carbon Nanotubes / Epoxy Resin Composite
[0030] Take 30g of epoxy resin and preheat at 60°C; weigh 0.3g of aminated multi-walled carbon nanotubes modified wit...
Embodiment 2
[0032] Step 1: Preparation of Aminated Carbon Nanotubes
[0033] Mix 0.2 g of purified carbon nanotubes with an average diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 30 g of hexamethylenediamine, and 5 g of N, N'-dicyclohexylcarbodiimide, and place them in an oil bath at 120 ° C. Heated to reflux for 36h. After the reaction was completed, excess amine, N, N'-dicyclohexylcarbodiimide and other by-products were ultrasonically washed with absolute ethanol, filtered with a microporous membrane (0.45 μm in diameter), and washed three times. The filtered carbon tubes were dissolved in dichloromethane, the insoluble residue was filtered out, and the filtrate was collected and evaporated to dryness to obtain aminated multi-walled carbon nanotubes modified with hexamethylenediamine.
[0034] Step 2: Preparation of Aminated Carbon Nanotubes / Epoxy Resin Composite
[0035] Take 30g of epoxy resin and preheat at 60°C; weigh 0.3g of aminated multi-walled carbon nanotubes modified w...
Embodiment 3
[0037] Step 1: Preparation of Aminated Carbon Nanotubes
[0038] Mix 0.2 g of purified carbon nanotubes with an average diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 30 g of triethylenetetramine, and 5 g of N, N'-dicyclohexylcarbodiimide, and place them in an oil bath at 120 ° C. Heated to reflux for 36h. After the reaction is completed, use absolute ethanol to ultrasonically wash off excess amines, N, N'-dicyclohexylcarbodiimide and other by-products, filter with a microporous membrane (0.22 μm in diameter), and repeat the cleaning several times . The filtered carbon tubes were dissolved in dichloromethane, the insoluble residue was filtered out, and the filtrate was collected and evaporated to dryness to obtain triethylenetetramine-modified aminated multi-walled carbon nanotubes.
[0039] Step 2: Preparation of Aminated Carbon Nanotubes / Epoxy Resin Composite
[0040] Take 30g of epoxy resin and preheat at 60°C; weigh 0.3g of aminated multi-walled carbon nanotubes m...
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