Preparation method of MXene-CNT/carbon aerogel composite material
A technology of composite materials and carbon airgel, which is applied in shielding materials, electrical components, magnetic field/electric field shielding, etc., can solve the problems of poor electromagnetic shielding performance, high reflection ratio, high filler content of composite materials, etc., and achieve low production cost, Strong absorption, simple and feasible preparation method
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[0045] Example 1
[0046] One inventive MXene-CNT / carbon airgel composite material, according to the specific embodiment the steps of:
[0047] Step 1, by etching Ti LiF-HCl 3 ALC 2 (MAX phase) preparing a precursor powder less MXene layer, the following steps:
[0048] Step 1.1, the 2gLiF with 40ml 9mol / L HCl is thoroughly mixed, and then under an ice bath was added slowly with 2gMAX precursor powder;
[0049] Step 1.2, the mixture was stirred for 24 hours at 35 ℃, Ti obtain 3 C 2 T x The suspension was washed with deionized water repeatedly until pH 7, centrifuged at 3500r / min; and
[0050] Step 1.3, will TI 3 C 2 T x The precipitate was dispersed in 100ml of deionized water, sonicated for 15min, to facilitate MXene stratified multilayer, and continue at a rate of 3500r / min centrifugal 15min, the cycle several times, the supernatant obtained MXene dispersion;
[0051] Step 1.4, the less the dispersion liquid layer MXene obtained previously frozen at -26 ℃ after 12h, lyop...
Example Embodiment
[0059] Example 2
[0060] One inventive MXene-CNT / carbon airgel composite material, according to the specific embodiment the steps of:
[0061] Step 1, by etching Ti LiF-HCl 3 ALC 2 (MAX phase) preparing a precursor powder less MXene layer, the following steps:
[0062] Step 1.1, the 2gLiF with 40ml 9mol / L HCl is thoroughly mixed, and then under an ice bath was added slowly with 2gMAX precursor powder;
[0063] Step 1.2, the mixture was stirred for 24 hours at 35 ℃, Ti obtain 3 C 2 T x The suspension was washed with deionized water repeatedly until pH 7, centrifuged at 3500r / min; and
[0064] Step 1.3, will TI 3 C 2 T x The precipitate was dispersed in 100ml of deionized water, sonicated for 15min, to facilitate MXene stratified multilayer, and continue at a rate of 3500r / min centrifugal 15min, the cycle several times, the supernatant obtained MXene dispersion;
[0065] Step 1.4, the less the dispersion liquid layer MXene obtained previously frozen at -26 ℃ after 12h, lyop...
Example Embodiment
[0073] Example 3
[0074] One inventive MXene-CNT / carbon airgel composite material, according to the specific embodiment the steps of:
[0075] Step 1, by etching Ti LiF-HCl 3 ALC 2 (MAX phase) preparing a precursor powder less MXene layer, the following steps:
[0076] Step 1.1, the 2gLiF with 40ml 9mol / L HCl is thoroughly mixed, and then under an ice bath was added slowly with 2gMAX precursor powder;
[0077] Step 1.2, the mixture was stirred for 24 hours at 35 ℃, Ti obtain 3 C 2 T x The suspension was washed with deionized water repeatedly until pH 7, centrifuged at 3500r / min; and
[0078] Step 1.3, will TI 3 C 2 T xThe precipitate was dispersed in 100 ml of deionized water, and the ultrasonic treatment was 15 min to facilitate the layering of the multilayer MXENE, then continued to centrifuge at a rate of 3500r / min, cycling several times, taking the supernatant, obtaining a MXENE dispersion;
[0079] Step 1.4, the above-mentioned minor MXENE dispersion was prepared at ...
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