3D composite having CNTs (carbon nanotubes) growing on Ti3C2 in situ and preparation method of 3D composite
A technology of in-situ growth and composite materials, which is applied in the field of titanium carbide in-situ growth of CNTs three-dimensional composite materials and its preparation, can solve the problem of high price, and achieve the effects of low equipment requirements, low cost and easy operation.
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[0032] The preparation method of the present invention comprises the following steps:
[0033] (1) Ternary layered Ti 3 AlC 2 Preparation of ceramic powder;
[0034] Synthesize ternary layered Ti according to the method of patent ZL201310497696.9 3 AlC 2 The preparation steps of the ceramic powder specifically include: firstly, mixing the experimental raw materials TiC, Ti, and Al powder according to the molar ratio of TiC:Ti:Al=2.0:1.0:1.2; secondly, mixing the mixture, alumina balls Alumina and absolute ethanol are ball milled in a corundum ball milling tank according to the mass ratio of 1:3:1, in which absolute ethanol is used as a ball milling aid, alumina balls are used as a grinding medium, the speed of the ball mill is 300r / min, and the wet ball milling is 4h Finally, dry in a constant temperature drying oven at 40°C for 24 hours; then, put the dried mixture into a corundum crucible, and carry out vacuum pressureless sintering in a vacuum hot-pressed carbon tube fu...
Embodiment 1
[0042] First, 300mg of Ti 3 C 2 Add nano-powder into 200mL ultrapure water, ultrasonically disperse for 30min; then, add 0.29g Co(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 4 hours to complete the liquid phase reaction; secondly, add 6.0 g of urea, and continue to stir the above mixed solution at a constant temperature of 80°C to evaporate water to obtain a gray precursor; finally, grind the precursor powder with an agate mortar After thinning, it is transferred to an Ar atmosphere tube furnace for heat treatment, heated to 800 °C at a heating rate of 4 °C / min, pyrolyzed for 1 h, cooled to room temperature under the protection of Ar, and then taken out to obtain Ti 3 C 2 @CNTs 3D composites.
[0043] 50-200mg of Ti obtained in Step 3 3 C 2 @CNTs nanopowder is mixed with conductive carbon black and binder (PTFE) at a mass ratio of 80:15:5, and ground in an agate mortar for 10-15min to form a uniform mud. Secondly, roll the above mud into a thin film, cut it into ...
Embodiment 2
[0045] First, 300mg of Ti 3 C 2 Add nano-powder into 200mL ultrapure water, ultrasonically disperse for 30min; then, add 0.29g Co(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 4 hours; secondly, 6.0 g of urea was added, and the above mixed solution was continuously stirred at a constant temperature of 80 °C to evaporate water to obtain a gray precursor; finally, the precursor powder was ground with an agate mortar, and transferred to In an Ar atmosphere tube furnace, heat up to 900°C at a heating rate of 4°C / min, pyrolyze for 1 hour, cool to room temperature under the protection of Ar and take it out to obtain Ti 3 C 2 @CNTs 3D composites. figure 1 for the resulting Ti 3 C 2 @CNTs 6.0 SEM images and XRD images of the 3D composites. It can be seen that the dense CNTs are evenly distributed on the Ti 3 C 2 On both sides of the sheet, the specific surface area of the layered material is significantly increased and the distance between the sheets is increased, mak...
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