Photocuring material for 3D printing
A light-curing material and 3D printing technology, applied in the field of 3D printing materials, can solve problems such as poor anti-aging performance, inability to apply end products, and poor fatigue resistance, and achieve good damping, high hardness, and improved mechanical strength.
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[0024] In the light-curing material for 3D printing according to the present invention, the preparation method of the modified carbon nanotube / calcium phosphosilicate composite powder may include the following steps: 1) adding calcium nitrate with a molar concentration of 0.1-1mol Sodium silicate solution per L, diamine hydrogen phosphate solution with a molar concentration of 0.1-1mol / L, and modified carbon nanotubes are put into the reactor in sequence, with a weight ratio of 1:10:10:0.1; 2) Start the reactor With a stirring device, the meter drips ammonia water at a rate of 0.5L / min, keeps the pH of the solution at 8-9, and continues to stir for 16-17 hours, then removes the filtrate by filtration, and thoroughly washes it with deionized water and absolute ethanol in turn. Wash the residual solid, filter it dry, and then dry it under vacuum at 100°C to obtain the billet; 3) Put the billet into a vacuum furnace with a vacuum degree of 1Mpa, calcining at 600-700°C for 2-2.5 ho...
Embodiment 1
[0038] 1) Immerse the carbon nanotubes in concentrated nitric acid and heat for 10h at a temperature of 150°C, filter,
[0039] Wash with deionized water until the pH is 6, dry in vacuum at 100°C for 3 hours, cool naturally, and grind to obtain carbon oxide nanotubes; Ethoxysilane, stirred at 80°C for 2h, filtered through a Φ0.45μm polytetrafluoroethylene membrane, washed with absolute ethanol, and vacuum-dried at 120°C to obtain modified carbon nanotubes.
[0040] 2) Put calcium nitrate, sodium silicate solution with a molar concentration of 0.1mol / L, diamine hydrogen phosphate solution with a molar concentration of 0.1mol / L, and modified carbon nanotubes into the reactor in sequence, with a weight ratio of 1:10 :10:0.1; start the stirring device of the reactor, the meter drips ammoniacal liquor at a speed of 0.5L / min, keeps the pH of the solution at 8, and continues to stir for 16 hours, then filters and removes the filtrate, and uses deionized water and Fully wash the resi...
Embodiment 2
[0045] 1) Immerse the carbon nanotubes in concentrated nitric acid and heat for 10 hours at a temperature of 150°C, filter, wash with deionized water until the pH is 7, vacuum dry at 100°C for 3 hours, cool naturally, and grind to obtain oxidized carbon nanotubes; 2) the Add oxidized carbon nanotubes to the ethanol solution, then add 3-aminopropyltriethoxysilane dropwise, stir at 80°C for 5h, filter through a Φ0.45μm polytetrafluoroethylene membrane, wash with absolute ethanol, and vacuum dry at 120°C , to obtain modified carbon nanotubes.
[0046] 2) Put calcium nitrate, sodium silicate solution with a molar concentration of 1mol / L, diamine hydrogen phosphate solution with a molar concentration of 1mol / L, and modified carbon nanotubes into the reaction kettle in sequence, with a weight ratio of 1:10:10 : 0.1; start the stirring device of the reactor, the meter drips ammoniacal liquor with the speed of 0.5L / min, keeps the pH of the solution to be 9, and continues to stir for 1...
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