Carbon nanotube compound and method for producing the same
The invention provides a carbon nanotube compound and method for producing the same. The method of the invention comprises the following steps. Firstly, Aniline-trimer and DMAc(dimethyl acetamide) solution are mixed to form a first solution. Secondly, Dianhydride and DMAc solution are mixed to form a second solution. The first solution and the second are mixed to form a third solution. Additionally, carboxyl-multiwall carbon nanotubes (c-MWNT), Diaminodiphenylether and DMAc solution are mixed to form a fourth solution. The third solution and the fourth are mixed to form a polyamic acid/CNT solution. Some polyamic acid/CNT solution is spread on a substrate and processed by a thermal treatment, and a carbon nanotube compound is eventually produced.
1. A method for producing a carbon nanotube (CNT) compound, comprising the following steps:
mixing an Aniline-trimer and a first DMAc(dimethyl acetamide) solution to form a first solution;
mixing a Dianhydride and a second DMAc solution to form a second solution;
mixing the second solution and the first solution to form a third solution;
mixing carboxyl-multiwall carbon nanotubes (c-MWNTs), a Diaminodiphenylether, and a third DMAc solution to form a fourth solution;
mixing the fourth solution and the third solution to obtain a polyamic acid/CNT solution; and
spreading a part of the polyamic acid/CNT solution on a substrate and processing the part of the polyamic acid/CNT solution spread on the substrate by a thermal treatment to form the carbon nanotube compound on the substrate.
2. The method of claim 1 , wherein a molar ratio of the Aniline-trimer to the Dianhydride to the Diaminodiphenylether is about 0.47:1:1.
3. The method of claim 1 , wherein the c-MWNTs substantially occupy 0.5-3 weight percents of the fourth solution.
4. The method of claim 1 , wherein a temperature of the thermal treatment is increased from room temperature to about 300° C. stage by stage.
5. The method of claim 1 , further comprising the following step:
mixing a multiwall carbon nanotube and a sulfuric acid/nitric acid mixed solution to perform a surface functional group transformation to generate a carboxylic acid on the surface of the multiwall carbon nanotube to obtain the carboxyl-multiwall carbon nanotube.
6. The method of claim 5 , wherein a volumetric ratio of the sulfuric acid to the nitric acid of the sulfuric acid/nitric acid mixed solution is 3:1; the purity of the sulfuric acid is 90%, and the purity of the nitric acid is 70%.
7. The method of claim 5 , wherein the surface functional group transformation is performed under ultrasonic vibration conditions.
8. The method of claim 1 , further comprising the following steps:
mixing p-Phenylenediamine, chloride solution, and ethanol solution to form first mixed solution;
mixing ammonium persulfate and the first mixed solution to form second mixed solution, and stirring the second mixed solution;
mixing an aniline monomer and the second mixed solution to form a third mixed solution and stirring the third mixed solution;
filtering the third mixed solution under low pressure condition to obtain a first product;
mixing the first product and an ammonium hydroxide solution to form a fourth mixed solution and stirring the fourth mixed solution;
filtering the fourth mixed solution under low pressure condition to obtain a second product; and
purifying the second product by column chromatography to obtain the Aniline-trimer.
9. The method of claim 8 , wherein a molar ratio of the p-Phenylenediamine to the ammonium persulfate to the aniline monomer is about 1:1:2.