Carbon nanotube composite material, and preparation method and application thereof
A technology of carbon nanotubes and composite materials, which is applied in the preparation method of peptides, chemical instruments and methods, animal/human peptides, etc., can solve the problem that the adsorption performance of carbon nanotubes cannot be fully exerted, the content of carbon nanotubes is low, and the adsorption performance cannot be fully utilized. issues such as full play
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[0026] A method for preparing a carbon nanotube composite material provided by an embodiment of the present invention includes the following steps:
[0027] S1. Preparation of carboxylated carbon nanotubes
[0028] In order to further improve the loading capacity and dispersibility of carbon nanotubes, it is advisable to use carboxylated carbon nanotubes. Carboxylated carbon nanotubes can be commercially available raw materials or self-synthesized.
[0029] In other embodiments, general carbon nanotubes such as multi-walled carbon nanotubes, single-walled carbon nanotubes, etc. may also be used.
[0030] Preferably, the carboxylated carbon nanotubes are obtained by acidifying the carbon nanotube body through a mixed acid solution, and introducing various functional groups (such as -COOH, -OH or -C=O ), can increase the loading capacity in the polymer, and can further avoid the agglomeration phenomenon of carbon nanotubes, and improve the dispersion performance of carbon nanot...
Embodiment 1
[0051] This embodiment provides a method for preparing a carbon nanotube composite material, which includes the following steps:
[0052] (1) Weigh 110 mg of multi-walled carbon nanotubes (MWCNTs) into a 50 mL ethanol solution (50%, v / v) beaker, stir for 10 min, and clean the MWCNTs with pure water suction filtration. After filtration, collect and put into 60mL 98% H 2 SO 4 -70%HNO 3 In the mixed acid solution (3:1, v / v), reflux in a water bath at 60°C for 5h. Filter, wash with pure water until neutral, suction filter, and vacuum-dry to obtain black powder, which is carboxylated carbon nanotubes.
[0053] (2) Dissolve 47 μL of functional monomer methacrylic acid (MAA) in 1100 μL of methanol, add 500 mg of PEG6000, shake well, then add 400 μL of cross-linking agent EGDMA and 4.5 mg of initiator AIBN, shake until AIBN is completely dissolved until. The above polymerization solution was injected into a test tube, sealed with silica gel, and placed in an oven at 60° C. for 20...
Embodiment 2
[0056] This embodiment provides a method for preparing a carbon nanotube composite material, which includes the following steps:
[0057] (1) Weigh 110 mg of single-walled carbon nanotubes and put them into 52 mL of 95% H 2 SO 4 -65%HNO 3 In the mixed acid solution (2:1, v / v), reflux in a water bath at 50°C for 6h. Filter, wash with pure water until neutral, suction filter, and vacuum-dry to obtain black powder, which is carboxylated carbon nanotubes.
[0058] (2) Dissolve 47 μL of functional monomer acrylamide (AM) in 1100 μL of methanol, shake well, then add 400 μL of cross-linking agent methylenebisacrylamide and 4.5 mg of initiator AIBN, and shake until AIBN is completely dissolved. The above polymerization solution was injected into a test tube, sealed with silica gel, and placed in a 50° C. oven for 25 minutes to react for prepolymerization to form a polymerization solution containing oligomers.
[0059] (3) Add the carboxylated carbon nanotubes of step (1) into the ...
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