CN101440228A - Preparation of water-dispersion multi-wall nano-carbon tube - Google Patents
Preparation of water-dispersion multi-wall nano-carbon tube Download PDFInfo
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- CN101440228A CN101440228A CN 200710188576 CN200710188576A CN101440228A CN 101440228 A CN101440228 A CN 101440228A CN 200710188576 CN200710188576 CN 200710188576 CN 200710188576 A CN200710188576 A CN 200710188576A CN 101440228 A CN101440228 A CN 101440228A
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- carbon nano
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- walled carbon
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Abstract
The invention discloses a method for preparing a water dispersible multi-wall carbon nano tube. The multi-wall carbon nano tube is treated by concentrated nitric acid and then reacts with NaOH or KOH alkaline solution so as to be converted into a multi-wall carbon nano tube carboxylate; and the carboxylate is further treated by cetyltrimethylammonium bromide or benzyl triethyl ammonium bromide cation surface active agent to obtain the water dispersible multi-wall carbon nano tube. After treatment by the method, the multi-wall carbon nano tube can be steadily dispersed in water for a long time.
Description
Technical field
The present invention relates to a kind of preparation method of water-dispersion multi-wall nano-carbon tube
Background technology
Carbon nanotube is a kind of novel monodimension nanometer material of being found by Japanese scientist professor Iijima in 1991, because its particular structure mechanics and electromagnetic property, the ideal that is considered to matrix material is added the compound mutual supplement with each other's advantages or the reinforcement that can realize group element material of phase carbon nanotube and polymkeric substance, but can utilize the special performance carbon nanotube of carbon nanotube to have very high surface energy cost-effectively, be in the thermodynamic instability state, easily reunite, the difficult dispersion, make the application of carbon nanotube in matrix material be subjected to that certain limitation Chinese patent 02104528.3 is described will to make water-soluble carbon nanometer tube but its complicated operation with primary amine that contains polyglycol ether or secondary amine reaction after the carbon nanotube chloride of purifying, the intermediate product carbon nanotube acyl chlorides activity that generates is stronger, in washing process easily with environment in the water reaction, cause the productive rate reduction of next step reaction
Summary of the invention
The object of the present invention is to provide a kind of preparation method of simple and effective water-dispersion multi-wall nano-carbon tube, this method has raw material and easily purchases characteristics such as simple to operate
A kind of preparation method of water-dispersion multi-wall nano-carbon tube is characterized in that this method may further comprise the steps: at first the effective concentrated nitric acid of multi-wall carbon nano-tube is carried out acidification; Again the multi-walled carbon nano-tubes of acidification was refluxed 5～15 hours in 100-120 ℃ in NaOH or KOH basic solution, obtain the multi-walled carbon nano-tubes carboxylate salt through centrifugal washing; At last the multi-walled carbon nano-tubes carboxylate salt is distributed in the aqueous solution of cetyl trimethylammonium bromide or benzyl triethyl ammonium bromide tensio-active agent,, obtains the multi-walled carbon nano-tubes solution of water-dispersion through sonic oscillation
In aforesaid method, the mass ratio of the multi-walled carbon nano-tubes of acidification and NaOH or KOH basic solution is 1:100-200, and wherein basic solution concentration is the 10-60 grams per liter.
In aforesaid method, the mass ratio of multi-walled carbon nano-tubes carboxylate salt and cetyl trimethylammonium bromide or benzyl triethyl ammonium bromide tensio-active agent is 1:100-200 part, and wherein surfactant concentration is the 5-50 grams per liter.
Water-dispersion multi-wall nano-carbon tube preparation method's of the present invention characteristics are the cation group in cetyl trimethylammonium bromide or the benzyl triethyl ammonium bromide cats product and the carboxylate anion electrostatic attraction of multi-wall carbon nano-tube tube-surface, the cation group molecular chain is adsorbed onto the multi-wall carbon nano-tube tube-surface, obtaining in water carbon nanotube that dispersive multi-walled carbon nano-tubes the present invention easily obtains can stable dispersion January in containing the small cations water phase surfactant mixture and to lose sinking the present invention simple to operate, environment is less to middle product influence, and industrialization easily
Embodiment
Embodiment 1:
Get 2.0 gram multi-walled carbon nano-tubes, add in the 60ml concentrated nitric acid, be chilled to room temperature in 100 ℃ of reflux 2h, the multi-walled carbon nano-tubes that filtration drying obtains acidification joins the multi-walled carbon nano-tubes of above-mentioned 0.5 gram acidification in 50ml NaOH (20 grams per liter) solution and is cooled to room temperature in 115 ℃ of backflow 6h, filtration drying obtains the carboxylate salt of multi-walled carbon nano-tubes.Then 0.5 carboxylate salt that restrains multi-walled carbon nano-tubes being joined 50ml contains in the 0.5 gram cetyl trimethylammonium bromide aqueous solution, ultra-sonic dispersion, obtain finely dispersed multi-walled carbon nano-tubes solution with this solution left standstill after January, multi-walled carbon nano-tubes still is dispersed in the aqueous solution uniformly.
Embodiment 2:
Then the multi-walled carbon nano-tubes of 0.5 gram acidification is joined in 50ml KOH (20 grams per liter) solution and is cooled to room temperature with 115 ℃ of backflow 6h by executing example 1 described preparation acidifying multi-walled carbon nano-tubes, filtration drying obtains the carboxylate salt of multi-walled carbon nano-tubes.Then the carboxylate salt of multi-walled carbon nano-tubes being joined 50ml contains in the 0.25 gram cetyl trimethylammonium bromide aqueous solution, ultra-sonic dispersion, obtain finely dispersed multi-walled carbon nano-tubes solution with this solution left standstill after January, multi-walled carbon nano-tubes still is dispersed in the aqueous solution uniformly.
Embodiment 3:
By the carboxylate salt of executing example 1 preparation multi-walled carbon nano-tubes the multi-walled carbon nano-tubes of above-mentioned processing being added to 50ml contains in the 0.5 gram benzyl triethyl ammonium bromide aqueous solution, ultra-sonic dispersion, obtain finely dispersed multi-walled carbon nano-tubes solution with this solution left standstill after January, multi-walled carbon nano-tubes still is suspended in the aqueous solution uniformly.
Embodiment 4:
By the carboxylate salt of executing example 1 preparation multi-walled carbon nano-tubes the multi-walled carbon nano-tubes of above-mentioned processing being added to 50ml contains in the 1.0 gram benzyl triethyl ammonium bromide aqueous solution, ultra-sonic dispersion, obtain finely dispersed multi-walled carbon nano-tubes solution with this solution left standstill after January, multi-walled carbon nano-tubes still is suspended in the aqueous solution uniformly.
Claims (3)
1, a kind of preparation method of water-dispersion multi-wall nano-carbon tube is characterized in that this method may further comprise the steps: at first the effective concentrated nitric acid of multi-wall carbon nano-tube is carried out acidification; Again the multi-walled carbon nano-tubes of acidification was refluxed 5～15 hours in 100-120 ℃ in NaOH or KOH basic solution, obtain the multi-walled carbon nano-tubes carboxylate salt through centrifugal, washing; At last the multi-walled carbon nano-tubes carboxylate salt is distributed in the aqueous solution of cetyl trimethylammonium bromide or benzyl triethyl ammonium bromide tensio-active agent,, obtains the multi-walled carbon nano-tubes solution of water-dispersion through sonic oscillation.
2, the method for claim 1 is characterized in that the multi-walled carbon nano-tubes of acidification and the mass ratio of NaOH or KOH basic solution are 1:100-200, and wherein basic solution concentration is the 10-60 grams per liter.
3, the method for claim 1, the mass ratio that it is characterized in that multi-walled carbon nano-tubes carboxylate salt and cetyl trimethylammonium bromide or benzyl triethyl ammonium bromide tensio-active agent are 1:100-200 part, and wherein surfactant concentration is the 5-50 grams per liter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710188576 CN101440228A (en) | 2007-11-22 | 2007-11-22 | Preparation of water-dispersion multi-wall nano-carbon tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710188576 CN101440228A (en) | 2007-11-22 | 2007-11-22 | Preparation of water-dispersion multi-wall nano-carbon tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101440228A true CN101440228A (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200710188576 Pending CN101440228A (en) | 2007-11-22 | 2007-11-22 | Preparation of water-dispersion multi-wall nano-carbon tube |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105540567A (en) * | 2016-02-26 | 2016-05-04 | 太原理工大学 | Single multi-wall carbon nanotube dispersion liquid and preparation method thereof |
| CN111871384A (en) * | 2020-08-10 | 2020-11-03 | 南京大学 | Modified carbon nano tube and preparation method and application thereof |
| CN113764660A (en) * | 2021-09-24 | 2021-12-07 | 肇庆理士电源技术有限公司 | Trace amino modified carbon nanotube negative plate, lead paste and preparation method of trace amino modified carbon nanotube negative plate |
-
2007
- 2007-11-22 CN CN 200710188576 patent/CN101440228A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105540567A (en) * | 2016-02-26 | 2016-05-04 | 太原理工大学 | Single multi-wall carbon nanotube dispersion liquid and preparation method thereof |
| CN111871384A (en) * | 2020-08-10 | 2020-11-03 | 南京大学 | Modified carbon nano tube and preparation method and application thereof |
| CN113764660A (en) * | 2021-09-24 | 2021-12-07 | 肇庆理士电源技术有限公司 | Trace amino modified carbon nanotube negative plate, lead paste and preparation method of trace amino modified carbon nanotube negative plate |
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Open date: 20090527 |