CN115818626A - Ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes - Google Patents
Ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes Download PDFInfo
- Publication number
- CN115818626A CN115818626A CN202211435661.8A CN202211435661A CN115818626A CN 115818626 A CN115818626 A CN 115818626A CN 202211435661 A CN202211435661 A CN 202211435661A CN 115818626 A CN115818626 A CN 115818626A
- Authority
- CN
- China
- Prior art keywords
- carbon nanotubes
- dispersion
- solution
- ultrasonic
- peroxodisulfate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 101
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 100
- 239000006185 dispersion Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002048 multi walled nanotube Substances 0.000 claims abstract description 22
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 230000004048 modification Effects 0.000 claims abstract description 12
- 238000012986 modification Methods 0.000 claims abstract description 12
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 9
- 239000008213 purified water Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000005303 weighing Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims description 40
- 125000005385 peroxodisulfate group Chemical group 0.000 claims description 13
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical group [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 7
- 238000001132 ultrasonic dispersion Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 3
- 238000000527 sonication Methods 0.000 description 3
- 238000005411 Van der Waals force Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000002546 full scan Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- -1 sulfate radicals Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Abstract
The invention discloses an ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes, and belongs to the technical field of carbon nanotube dispersion. The invention is used for solving the technical problems that the time for keeping the carbon nano tube in a stable dispersion state in a dispersion system is short, the strong acid modifies the carbon nano tube, and the risk of damaging the structure of the carbon nano tube exists in the prior art, and comprises the following steps: weighing 1-3 parts of multi-walled carbon nano-tube, 600-18000 parts of peroxydisulfate and 25000-75000 parts of purified water according to parts by weight, adding the mixture into a beaker, and uniformly stirring to obtain a mixed solution. According to the invention, the carbon nano tube is modified by the mutual matching of ultrasonic assistance and peroxydisulfate, so that the damage of strong acid modification to the carbon nano tube is avoided, the surface hydrophilicity of the modified carbon nano tube is improved, the dispersion efficiency of carbon nano tube aggregates is improved under the action of surface hydrogen bonds, and the dispersion system also has a wide pH working range.
Description
Technical Field
The invention relates to the technical field of carbon nanotube dispersion, in particular to an ultrasonic-assisted and peroxodisulfate-modified high-efficiency dispersion method for carbon nanotubes.
Background
Carbon Nanotubes (CNTs) have a seamless cylindrical structure with sidewalls rolled up from one or several graphene sheets. This unique structure imparts significant properties to the carbon nanotubes, including superior electrical and thermal conductivity, as well as mechanical stability. The special characteristics of the carbon nanotubes promote the mass production and application of the carbon nanotubes in the fields of electrochemistry, biomedicine, environmental remediation and the like.
Since carbon nanotubes have various excellent properties, stable colloidal suspensions thereof are increasingly required in industry and manufacturing. Carbon nanotubes are an emerging material, and various properties of the carbon nanotubes after being stably dispersed in a device are researched. The natural characteristics of carbon nanotubes in terms of conductivity and strength are utilized to uniformly disperse carbon nanotubes or to coat carbon nanotubes into a thin film.
Typical prior art dispersion methods for carbon nanotubes are: shear mixing/sonication, the use of surfactants, polymers, polyamides and selected novel agents, sonication is the most widely used method for physically homogenizing media, and studies on sonication have confirmed that the dispersion mechanism is such that aggregates are affected by shear stress from the media once cavitation has produced localized shear stress, and although they are the most intuitive method of dispersion, the state of dispersion is temporary, and different surface modifications have been made to the dispersion of carbon nanotubes in order to improve the stability of the carbon nanotube dispersion. H used in advance in traditional pretreatment 2 SO 4 /HNO 3 When the carbon nanotubes are modified by strong acid, the operation steps are increased, and the strong oxidizing property may bring the risk of damaging the structure of the carbon nanotubes and increase the operation risk.
A solution is now proposed to address the technical drawbacks in this respect.
Disclosure of Invention
The invention aims to provide an ultrasonic-assisted and peroxodisulfate-modified high-efficiency dispersion method for carbon nanotubes, which is used for solving the technical problems that in the prior art, the time for the carbon nanotubes to keep a stable dispersion state in a dispersion system is short, and the carbon nanotubes are modified by strong acid, so that the structure of the carbon nanotubes is damaged.
The purpose of the invention can be realized by the following technical scheme:
the method for efficiently dispersing the carbon nano tube modified by the peroxodisulfate with the assistance of the ultrasonic comprises the following operation steps:
s1, weighing 1-3 parts of multi-walled carbon nanotubes, 600-18000 parts of peroxydisulfate and 25000-75000 parts of purified water according to parts by weight, adding the weighed materials into a beaker, and uniformly stirring to obtain a mixed solution;
s2, adding a pH regulating solution into the beaker, and regulating the pH =3.8-12 of the mixed solution in the beaker to obtain a solution to be dispersed;
and S3, carrying out ultrasonic modification on the solution to be dispersed for 64min by using an ultrasonic generator until the solution to be dispersed is completely dissolved to obtain a dispersion system.
Furthermore, the multi-walled carbon nano-tube has the purity of more than 99 percent, the ash content of less than 1 percent, the outer diameter of 5 to 15nm, the inner diameter of 2 to 5nm and the length of 10 to 30 mu m.
Further, the peroxodisulfate is sodium peroxodisulfate.
Further, the pH regulating solution is 0.3-0.5 mol/L sodium hydroxide solution or 0.3-0.5 mol/L potassium hydroxide solution.
Further, the ultrasonic generator is JH2000w-20 in a mode of 2s on and 2s off and in a 20khz mode, the ultrasonic titanium probe is immersed below about 2cm of the surface of the solution, and the ultrasonic amplitude is 70%.
The invention has the following beneficial effects:
1. the carbon nano tube disclosed by the invention is matched with peroxodisulphate through ultrasonic assistance, ultrasonic waves take high-temperature and high-pressure cavitation bubbles as marks, the peroxodisulphate is activated through cracking of O-O bonds, sulfate radicals generated by persulfate activation creatively realize great improvement of the oxidation degree of the surface of the carbon nano tube from 3% to 15%, pretreatment work using strong acid is avoided when the same surface oxidation degree is reached, the hydrophilicity of the surface of the carbon nano tube is greatly improved through the improvement of the oxidation degree, the dispersibility of carbon nano tube aggregates is improved through the surface hydrogen bonding effect, and the dispersion efficiency of the carbon nano tube is improved.
2. According to the invention, after the carbon nanotubes are modified for 64 minutes by the assistance of the peroxodisulfate and the ultrasound, the carbon nanotubes can be stably dispersed and can be kept in a uniformly dispersed suspension state for 20 days at room temperature, and the problems that in untreated original carbon nanotube liquid, the carbon nanotubes are difficult to disperse in the solution due to Van der Waals force on the side walls of the carbon nanotubes, and the interaction of the carbon nanotubes with the dispersed solution is poor due to the lack of effective functional groups on the side walls of the carbon nanotubes, so that the carbon nanotubes are hydrophobic and agglomerated, and the original carbon nanotubes are completely incapable of being stably dispersed after the ultrasound treatment is stopped are solved.
3. The carbon nano tube in the carbon nano tube dispersion system of the invention exists in the dispersion system in the form of micro aggregates with the particle size of less than 1200nm or even single carbon nano tube, the problems that the carbon nano tube has larger length-diameter ratio in the form of the carbon nano tube and is entangled more in the interior of the carbon nano tube aggregate to form larger-sized particles or even flocculent aggregates visible to naked eyes in the prior art are solved, the dispersion system has a wide pH range, the pH range reaches 3.8-12.0, the carbon nano tube aggregate is uniformly and stably dispersed with the particle size of less than 1200nm or 100 percent of the carbon nano tube in the pH range, and the dispersion is quicker in the alkaline range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a TEM image of a solution (a) to be dispersed and a dispersion (b) in example 2 of the present invention;
FIG. 2 is a dispersion photograph taken at different times during the dispersion of a solution to be dispersed in example 2 of the present invention;
FIG. 3 is a photograph showing the dispersion of the carbon nanotube dispersion of example 2 of the present invention after being left for 1 day, 2 days, 15 days and 20 days;
FIG. 4 is a full-scan spectrum of an X-ray photoelectron spectrometer of carbon nanotubes at different stages in the original carbon nanotube dispersion process in example 2 of the present invention;
FIG. 5 is a spectrum of C1s of carbon nanotubes in a dispersion according to example 2 of the present invention;
FIG. 6 is a line graph showing the dispersion efficiency of carbon nanotubes under different pH conditions according to examples 1 to 3 of the present invention;
fig. 7 is a graph showing the particle size monitoring distribution of carbon nanotube aggregates during the dispersion process of carbon nanotubes in example 2 of the present invention.
Detailed Description
The technical solutions of the present invention will be described below clearly and completely in conjunction with the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The ultrasonic-assisted and peroxodisulfate-modified carbon nanotube efficient dispersion method of the embodiment comprises the following operation steps:
s1, weighing 4mg of multi-walled carbon nanotubes, 2.4g of sodium peroxodisulfate and 100g of purified water according to parts by weight, adding the multi-walled carbon nanotubes, the sodium peroxodisulfate and the purified water into a beaker, and uniformly stirring to obtain a mixed solution, wherein the purity of the multi-walled carbon nanotubes is more than 99%, the ash content of the multi-walled carbon nanotubes is less than 1%, the outer diameter of the multi-walled carbon nanotubes is 5-15 nm, the inner diameter of the multi-walled carbon nanotubes is 2-5 nm, and the length of the multi-walled carbon nanotubes is 10-30 micrometers;
s2, adding no pH regulating solution into the beaker, wherein the pH =3.8 of the mixed solution in the beaker, so as to obtain a solution to be dispersed;
and S3, using an ultrasonic generator with the model number of JH2000w-20, immersing an ultrasonic titanium probe below about 2cm of the surface of the solution in a mode of 2S on/off and 20khz mode, wherein the ultrasonic amplitude is 70%, carrying out ultrasonic modification on the solution to be dispersed for 64min, and obtaining a dispersion system after the solution to be dispersed is completely dissolved.
Example 2
The ultrasonic-assisted and peroxodisulfate-modified carbon nanotube efficient dispersion method of the embodiment comprises the following operation steps:
s1, weighing 6mg of multi-walled carbon nanotubes, 3.6g of potassium peroxodisulfate and 150g of purified water according to parts by weight, adding the multi-walled carbon nanotubes, 3.6g of potassium peroxodisulfate and 150g of purified water into a beaker, and uniformly stirring to obtain a mixed solution, wherein the purity of the multi-walled carbon nanotubes is more than 99%, the ash content is less than 1%, the outer diameter is 5-15 nm, the inner diameter is 2-5 nm, and the length is 10-30 mu m;
s2, adding 0.4mol/L potassium hydroxide solution into a beaker, and adjusting the pH =7 of the mixed solution in the beaker to obtain a solution to be dispersed;
and S3, using an ultrasonic generator with the model number of JH2000w-20, immersing an ultrasonic titanium probe below about 2cm of the surface of the solution in a mode of 2S on/off and 20khz mode, wherein the ultrasonic amplitude is 70%, carrying out ultrasonic modification on the solution to be dispersed for 64min, and obtaining a dispersion system after the solution to be dispersed is completely dissolved.
Example 3
The ultrasonic-assisted and peroxodisulfate-modified carbon nanotube efficient dispersion method of the embodiment comprises the following operation steps:
s1, weighing 8mg of multi-walled carbon nanotubes, 2.4g of sodium peroxodisulfate, 2.4g of potassium peroxodisulfate and 200g of purified water in parts by weight, adding the multi-walled carbon nanotubes into a beaker, and uniformly stirring to obtain a mixed solution, wherein the purity of the multi-walled carbon nanotubes is more than 99%, the ash content of the multi-walled carbon nanotubes is less than 1%, the outer diameter of the multi-walled carbon nanotubes is 5-15 nm, the inner diameter of the multi-walled carbon nanotubes is 2-5 nm, and the length of the multi-walled carbon nanotubes is 10-30 mu m;
s2, adding 0.5mol/L sodium hydroxide solution into a beaker, and adjusting the pH =12 of the mixed solution in the beaker to obtain a solution to be dispersed;
and S3, using an ultrasonic generator with the model number of JH2000w-20, immersing an ultrasonic titanium probe below about 2cm of the surface of the solution in a mode of 2S on/off and 20khz mode, wherein the ultrasonic amplitude is 70%, carrying out ultrasonic modification on the solution to be dispersed for 64min, and obtaining a dispersion system after the solution to be dispersed is completely dissolved.
An experimental study carried out in relation to example 2 of the present invention, with reference to the accompanying drawings, was carried out as follows:
1) Referring to FIG. 1, it is apparent from transmission electron microscope images of the solution (a) to be dispersed and the dispersion (b) to be dispersed that the carbon nanotube aggregates in the solution to be dispersed are firmly held by a large number of contacts, which effectively act as physical crosslinks and the longer the tube, the more contacts. However, after the dispersion treatment, the carbon nanotubes in the resulting dispersion are singly dispersed, and there is no tendency for adhesion even near another carbon nanotube. This is because the carbon nanotubes are dispersed in the dispersion system individually after the modification treatment of the carbon nanotubes by the ultrasound-assisted peroxydisulfate, which explains the root cause that the carbon nanotube dispersion system is nearly transparent, and the adjacent carbon nanotubes have no adhesion tendency and are not easy to rebind, so that the carbon nanotube dispersion system is very stable, which explains the nearly transparent suspension.
2) Combining the pulverization photographs taken at different times during the dispersion of the solution to be dispersed in fig. 2 and the dispersion photographs taken after the dispersion of the carbon nanotubes is left standing for 1 day, 2 days, 15 days and 20 days in fig. 3, it can be seen that the carbon nanotubes are gradually "dissolved" in the dispersion along with the ultrasonic dispersion, and the dispersion is transparent before and after the dispersion time of 64min, because van der waals forces existing in the sidewalls of the carbon nanotubes make the carbon nanotubes hydrophobic, so that the carbon nanotubes have poor solubility and dispersibility in the mixed solution, the carbon nanotubes cluster together in the solution, and during the ultrasonic dispersion, the carbon nanotubes clustered together are subjected to the ultrasonic dispersion, so that the carbon nanotubes clustered together are gradually dispersed, so that the carbon nanotubes exist in the dispersion in the form of monomers, and the ultrasonic waves are marked by high-temperature high-pressure cavitation bubbles during the ultrasonic dispersion, thereby effectively activating peroxydisulfate through the cleavage of O-O bonds. Peroxodisulfate activation to generate free radical SO 4 Due to SO- 4 Has a higher standard oxidation-reduction potential in a wider pH range, the standard oxidation-reduction potential reaches 2.6-3.1V, and the peroxydisulfate is activated to generate SO 4 The outer wall of the carbon nano tube is oxidized, SO that the oxidation degree of the surface of the carbon nano tube is improved, the hydrophilicity of the surface of the carbon nano tube is greatly improved, the dispersion of carbon nano tube aggregates is accelerated under the action of surface hydrogen bonds, and the peroxodisulfate can utilize external energy such as heat, ultraviolet rays, ultrasound and the like, SO that the peroxodisulfate can continuously generate SO 4 -, make SO 4 Has better selectivity and longer half-life period, thereby realizing that the carbon nano tube keeps stable dispersion in a dispersion system and keeps a uniformly dispersed suspension state for 20 days under the condition of standing at room temperature.
3) Combining the full-scan spectrograms of the X-ray photoelectron spectrometer of the carbon nanotube at different stages in the original carbon nanotube dispersing process in fig. 4 and the spectrograms of the C1s of the carbon nanotube in the dispersing system in fig. 5, it can be seen that the oxygen content on the surface of the carbon nanotube increases from 3.65% to 15.16% with the time of ultrasonic dispersion, which indicates that the ultrasonic-assisted peroxodisulfate modification treatment is a carbon nanotube, which is an effective method for increasing the oxygen content on the surface of the carbon nanotube, and the introduction of the oxygen-containing functional group helps the carbon nanotube to disperse in the dispersing system.
4) Fig. 7 is a graph showing that the particle size of the carbon nanotube aggregate in the dispersion process of the carbon nanotubes is monitored by a nanometer particle size analyzer, and the particle size of the carbon nanotube aggregate in the first 40min is found to be changed rapidly and finally stabilized at about 1200nm, which is much smaller than the original size of the carbon nanotube aggregate, thereby indicating that the carbon nanotubes are uniformly dispersed in the dispersion system.
Experimental studies conducted with respect to examples 1-3 of the present invention, the following analyses were made with reference to the accompanying drawings:
in conjunction with fig. 6, it can be seen that the larger the pH value is, the shorter the time required for the carbon nanotubes to reach the dispersion equilibrium in the dispersion system is, but the less the time difference is required as a whole, which proves that the dispersion system can be applied in a dispersion environment with a wider pH range (pH = 3.8-12) and the carbon nanotubes are dispersed more rapidly in an alkaline range.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The method for efficiently dispersing the carbon nano tube modified by the peroxodisulfate with the assistance of the ultrasonic wave is characterized by comprising the following operation steps:
s1, weighing 1-3 parts of multi-walled carbon nanotubes, 600-18000 parts of peroxydisulfate and 25000-75000 parts of purified water according to parts by weight, adding the weighed materials into a beaker, and uniformly stirring to obtain a mixed solution;
s2, adding a pH regulating solution into the beaker, and regulating the pH =3.8-12 of the mixed solution in the beaker to obtain a solution to be dispersed;
and S3, carrying out ultrasonic modification on the solution to be dispersed for 64min by using an ultrasonic generator until the solution to be dispersed is completely dissolved to obtain a dispersion system.
2. The method for the high-efficiency dispersion of carbon nanotubes modified by peroxodisulfate with ultrasound assistance according to claim 1, wherein the multi-walled carbon nanotubes have a purity of more than 99%, an ash content of less than 1%, an outer diameter of 5 to 15nm, an inner diameter of 2 to 5nm, and a length of 10 to 30 μm.
3. The method of claim 1, wherein the peroxodisulfate salt is sodium peroxodisulfate.
4. The method for efficiently dispersing carbon nanotubes by ultrasonic assistance and peroxydisulfate modification of claim 1, wherein the pH adjusting solution is 0.3-0.5 mol/L NaOH solution or 0.3-0.5 mol/L KOH solution.
5. The method for high-efficiency dispersion of carbon nanotubes modified by peroxodisulfate as claimed in claim 1, wherein the ultrasonic generator is JH2000w-20 in mode "2s ON 2s OFF" and 20khz mode, the ultrasonic titanium probe is immersed below about 2cm of the surface of the solution, and the ultrasonic amplitude is 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211435661.8A CN115818626A (en) | 2022-11-16 | 2022-11-16 | Ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211435661.8A CN115818626A (en) | 2022-11-16 | 2022-11-16 | Ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115818626A true CN115818626A (en) | 2023-03-21 |
Family
ID=85528545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211435661.8A Pending CN115818626A (en) | 2022-11-16 | 2022-11-16 | Ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115818626A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101229918A (en) * | 2008-01-18 | 2008-07-30 | 北京化工大学 | Oxidation modifying method for carbon nano-tube |
| CN106430153A (en) * | 2016-10-18 | 2017-02-22 | 江南大学 | Preparing method of ultrashort carbon nano tube with high dispersibility |
| US20200087149A1 (en) * | 2015-07-22 | 2020-03-19 | Research Institute Of Petroleum Industry | Method for the synthesis of nanofluids |
| CN114057182A (en) * | 2021-12-22 | 2022-02-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Method for dispersing nano material |
-
2022
- 2022-11-16 CN CN202211435661.8A patent/CN115818626A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101229918A (en) * | 2008-01-18 | 2008-07-30 | 北京化工大学 | Oxidation modifying method for carbon nano-tube |
| US20200087149A1 (en) * | 2015-07-22 | 2020-03-19 | Research Institute Of Petroleum Industry | Method for the synthesis of nanofluids |
| CN106430153A (en) * | 2016-10-18 | 2017-02-22 | 江南大学 | Preparing method of ultrashort carbon nano tube with high dispersibility |
| CN114057182A (en) * | 2021-12-22 | 2022-02-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Method for dispersing nano material |
Non-Patent Citations (2)
| Title |
|---|
| PENG LIU等: "Ultrasonic-assisted chemical oxidative cutting of multiwalled carbon nanotubes with ammonium persulfate in neutral media", 《APPLIED PHYSICS A-MATERIALS SCIENCE&PROCESSING》, vol. 97, no. 4, pages 772 * |
| SHENGYI HUANG等: "Persulfate Chemical Functionalization of Carbon Nanotubes and Associated Adsorption Behavior in Aqueous Phase", 《INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH》, vol. 55, no. 21, pages 6061 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kumar et al. | MWCNT/TiO2 hybrid nano filler toward high-performance epoxy composite | |
| CN108609611B (en) | High-stability environment-friendly water dispersion of carbon nano tube and preparation method thereof | |
| Bhanvase et al. | Ultrasound assisted in situ emulsion polymerization for polymer nanocomposite: A review | |
| WO2019196386A1 (en) | Method for efficiently dispersing carbon nanotube | |
| CN101575096B (en) | Method for preparing carbon nanotube grafted with vinyl macromolecular chain on the surface | |
| Liu et al. | Influence of nanomaterial morphology of guar-gum fracturing fluid, physical and mechanical properties | |
| CA2924489C (en) | High carbon nanotube content fluids | |
| JP7134862B2 (en) | Redispersible composition containing cellulose fibers and non-cellulose granules | |
| CN110092369A (en) | A kind of method and application of nano silver modification carbon nano tube surface | |
| He et al. | Significantly enhanced actuation performance of IPMC by surfactant-assisted processable MWCNT/Nafion composite | |
| CN110697688A (en) | Preparation method of carbon nano tube water dispersion | |
| US20200087149A1 (en) | Method for the synthesis of nanofluids | |
| Ding et al. | Efficient exfoliation of layered materials by waste liquor | |
| JPWO2008152680A1 (en) | Method for producing carbon nanosheet | |
| CN115818626A (en) | Ultrasonic-assisted and peroxodisulfate-modified efficient dispersion method for carbon nanotubes | |
| CN109608555A (en) | A kind of method that ultrasonic wave assist acid hydrolysis microcrystalline cellulose prepares nanofiber crystalline substance | |
| Im et al. | Wet spinning of multi-walled carbon nanotube fibers | |
| CN110371964B (en) | Preparation method of graphene oxide material with nanoscale sheet diameter size | |
| Park et al. | Multiwalled carbon nanotubes functionalized with PS via emulsion polymerization | |
| Zhang et al. | Using Cellulose Nanocrystal as Adjuvant to Improve the Dispersion Ability of Multilayer Graphene in Aqueous Suspension | |
| Mallakpour et al. | Ultrasound-assisted surface treatment of ZrO2 with BSA and incorporating in PVC to improve the properties of the obtained nanocomposites: Fabrication and characterization | |
| Badgujar et al. | Ultrasound assisted organic pigment dispersion: Advantages of ultrasound method over conventional method | |
| CN110846925A (en) | Graphene-nanocellulose conductive paper and preparation method thereof | |
| KR100759754B1 (en) | Surface-modified carbon nanotube using dispersants and comonomers, carbon nanotube/polymer complex and preparations thereof | |
| JP5614681B2 (en) | Method for producing composite adhesive, composite adhesive and adhesive sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230321 |