CN104923095A - Physical dispersing method for carbon nano-tube - Google Patents
Physical dispersing method for carbon nano-tube Download PDFInfo
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- CN104923095A CN104923095A CN201510316349.0A CN201510316349A CN104923095A CN 104923095 A CN104923095 A CN 104923095A CN 201510316349 A CN201510316349 A CN 201510316349A CN 104923095 A CN104923095 A CN 104923095A
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Abstract
The invention discloses a physical dispersing method for a carbon nano-tube. The physical dispersing method is characterized in that deionized water and glycerin are mixed according to a certain ratio; a certain amount of an OP emulsifier is added into the mixed solution; heating and stirring are conducted in a water-bath kettle to ensure that the OP emulsifier is completely dissolved in the mixed solution of deionized water and glycerin; the carbon nano-tube is added into the mixed solution according to a certain mass volume ratio; ultrasonic concussion is conducted to obtain a dispersed carbon nano-tube solution. The physical dispersing method has the advantages that the dispersed carbon nano-tube solution can be stored for several months without precipitation; the experiment process is simple to operate, and pollution is avoided.
Description
Technical field
The invention belongs to the field of inorganic material and organic material, be specifically related to a kind of method of CNT being carried out physical dispersion.
Background technology
CNT (Carbon Nanotube is called for short CNT) is a kind of One-dimensional Quantum material with special construction, has the feature of high-specific surface area, high-ratio surface energy and high reaction activity.It has special physical and chemical performance, as: heat-resisting, corrosion-resistant, heat transfer and good conductivity, possess unique electronics, vestibule structure and absorption property.Its application is made to enumerate the various aspects such as numerous areas such as biology, information, electricity, optics, environmental science.As: for electronic material, hydrogen storage material, catalysis material, sorbing material, as electrode material for super capacitor, composite (conduction or anti-static plastic, EMI shield and stealth material), information storage, nanodevice (nanometer robot), material is set off in super large-scale integration heat radiation, computer chip heat-conducting plate, nano coaxial cable, molecular transistors, electronic switch, beauty treatment material, earthquake-resistant structure, pipeline synthesis is carried out in CNT, clean and the isotopic separation of radioactivity etc.
CNT has plurality of advantages and extensive use, but CNT is nano material manages again, belongs to monodimension nanometer material, is easy to reunite.The reason that CNT is reunited has two: the high apparent activation energy that winding and bigger serface cause.In actual application, its reunion form often destroys mechanics, the electrology characteristic of the excellence that single-root carbon nano-tube shows, thus limits the application of CNT.How simply to obtain the focus that homodisperse CNT is current research.Mainly efficiently the method for carbon nanotube dispersed can be mainly contained two classes: chemical modification and physical dispersion.The experiment condition of chemical method is harsh, can again reunite again in general 12 hours.Physical dispersion is generally disperseed it by surfactant, and in the system taking water as medium, the method is dispersed with good effect to CNT.
Summary of the invention
The object of the invention is to adopt OP emulsifying agent as dispersant, utilize ultrasonic vibration to disperse the CNT in glycerin solution.
The OP emulsifying agent that the present invention adopts is a kind of nonionic surface active agent, by being add the surface tension that OP reduces CNT in the aqueous solution of solvent in deionized water and glycerine, changing the interface state of system and reaches the object of dispersion; The absorption of OP emulsifying agent on the carbon nanotubes, can prevent or reduce the aggtegation of CNT and mutual wrapping phenomena.And ultrasonic vibration does medicine and has the effect (1) of two aspects in ultrasonic field, hyperacoustic cavitation can produce the high temperature and high pressure environment of local and have the microjet of strong impacts.Utilize localized hyperthermia, high pressure or strong shock wave and microjet etc., the effect energy between nano particle can be weakened significantly, thus effectively prevent nanoparticle agglomerates and make it abundant dispersion.(2) under ul-trasonic irradiation, the resonance of various component (as molecule, aggregate, particle, liquid pearl, bubble etc.) in system and the resonance effects caused. use circulating chilled water to prevent intensification from causing in ultrasonic procedure and again reunite.And generally have 2 kinds of modes to the sign of carbon nanotube dispersed performance: leave standstill dispersion liquid until precipitation (record sedimentation time) and CENTRIFUGAL ACCELERATING sedimentation (record centrifugation time).Due to gained of the present invention dispersion liquid extremely difficulty be centrifuged and be precipitated out, observe its sedimentation time so select to staticly settle.
OP emulsifying agent first joins in solvent by the present invention, be put into heating water bath in water-bath, and stirring, making OP emulsifying agent be dissolved in solvent completely, then adding a certain amount of CNT, in ultrasonic wave, carrying out ultrasonic vibration obtain homodisperse carbon nano-tube solution.Finally leave standstill the carbon nano-tube solution of dispersion and record its sedimentation time.
Wherein solvent is the mixed liquor of deionized water and glycerine, and its proportioning is 10:1 ~ 0.5:1; The type of OP emulsifying agent is: one or more in OP8, OP9, OP10, OP12, and its consumption accounts for 0. 5 ~ 5% of whole liquor capacity, and the amount of CNT is 0.1 ~ 16(mg/mL by mass volume ratio) add.The temperature of water-bath is located at 25 ~ 75 DEG C, and the time controling of stirring is between 10min ~ 60min, and the time controling of ultrasonic vibration is at 10min ~ 180min.
Compared with prior art, the present invention adopts OP emulsifying agent dispersing Nano carbon tubes, obtains good effect, and the carbon nano-tube solution of dispersion can be kept some months and can not precipitate, and its experiment process operation is simple, pollution-free.
Detailed description of the invention
Below by way of two embodiments, the present invention is further illustrated.
The method of embodiment 1 dispersing Nano carbon tubes is.
OP emulsifying agent, deionized water, glycerine are mixed with the ratio of 1:10:10, heat in the water-bath of 50 DEG C, stir 30min, OP emulsifying agent is made to be dissolved in the mixed liquor of deionized water and glycerine completely, CNT is added above-mentioned mixed liquor by the mass volume ratio of 10mg/mL, ultrasonic vibration 60min, namely obtains the dispersion liquid of CNT.
The method of embodiment 2 dispersing Nano carbon tubes is.
OP emulsifying agent, deionized water, glycerine are mixed with the ratio of 1:15:5, heat in the water-bath of 60 DEG C, stir 30min, OP emulsifying agent is made to be dissolved in the mixed liquor of deionized water and glycerine completely, CNT is added above-mentioned mixed liquor by the mass volume ratio of 8mg/mL, ultrasonic vibration 60min, namely obtains the dispersion liquid of CNT.
Be more than illustrating for possible embodiments of the present invention, but this embodiment be not used to limit the scope of the claims of the present invention, allly do not depart from equivalence of the present invention and implement or change, all should be contained in the scope of the claims of the present invention.
Claims (3)
1. a physical dispersion method for CNT, is specially: by OP emulsifying agent, is dissolved in by a certain percentage in solvent, CNT is added above-mentioned mixed liquor by certain mass volume ratio, ultrasonic vibration, namely obtain the dispersion liquid of CNT.
2. according to the OP emulsifying agent described in claim 1, it is characterized in that, the type of described OP emulsifying agent is: one or more in OP8, OP9, OP10, OP12, and its consumption accounts for 0. 5 ~ 5% of whole liquor capacity.
3. CNT physical dispersion method according to claim 1, is characterized in that, the mass volume ratio of described CNT and described mixed liquor is 0.1 ~ 16(mg/mL).
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| CN201510316349.0A CN104923095A (en) | 2015-06-11 | 2015-06-11 | Physical dispersing method for carbon nano-tube |
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Cited By (1)
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| CN106000144A (en) * | 2016-06-20 | 2016-10-12 | 青岛科技大学 | Gaseous phase dispersion method for multi-element micro-nano materials |
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Application publication date: 20150923 |