CN1927436A - Dispersion method for diamond nano powder - Google Patents
Dispersion method for diamond nano powder Download PDFInfo
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- CN1927436A CN1927436A CN 200510098707 CN200510098707A CN1927436A CN 1927436 A CN1927436 A CN 1927436A CN 200510098707 CN200510098707 CN 200510098707 CN 200510098707 A CN200510098707 A CN 200510098707A CN 1927436 A CN1927436 A CN 1927436A
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Abstract
The invention relates to a method for dispersing diamond nanometer powder. Wherein, it comprises: (1) dissolving disperse agent as sodium pyrophosphate in deionized water, while the mass percentage density of solution is 0.01-5%; (2), adding diamond nanometer powder at 0.01-5mass% of water; (3) dispersing with ultrasonic wave for 1-20mins; (4) adding disperse stabilizer carbowax (or Acacia Senegal powder, carboxymethyl cellulose) at 0.0001-1% of water; (5) treating with ultrasonic wave for 1-20mins, to obtain the diamond hydrosol whose average diameter is nanometer. The invention can be used to grind and furnish medium.
Description
Technical field
The present invention relates to a kind of diamond nano powder process for dispersing of (or claiming diamond superfine powder, diamond oversubscription loose powder), belong to the nano-powder manufacture field, its application relates to the production preparation of grinding, polishing, plated film or anti-corrosion medium.
Background technology
The detonation method is a kind of process of artificially synthesizing diamond nano powder commonly used.The TRANSIENT HIGH TEMPERATURE high pressure that it utilizes explosive charge to produce is converted into diamond with graphite powder.Except that containing diamond, also have the metal of graphite, agraphitic carbon and trace in the powder that obtains after the blast, these impurity need to remove with chemical method.As adopt strong oxidizers such as perchloric acid, sulfuric acid at a certain temperature with graphite, agraphitic carbon and burning, with impurity such as the molten shakeout soil of hydrofluoric acid, through washing, precipitation, oven dry, just obtained comparatively pure diamond nano powder again.
The synthetic bortz powder of detonation method has very little grain fineness, and first particle diameter only has several nanometer sizes.Because the Nano diamond particle surface energy is very high, and exists the interaction between the surface functional group, this superfine powder is in tens aggregating states to hundreds of nanometer size usually.Since detonation method diamond synthesis powder comes out, produced a large amount of dispersion technologies one after another, so that this dispersion of materials is in liquid at this ultra-fine grain.
Chinese invention patent 200410022936.0 and 02139764.3 discloses a kind of Nano diamond respectively and has separated reunion and a kind of method of preparing diamond grinding fluid.The common process for dispersing of two patents is: add wetting agent in decentralized medium (water) earlier, the pH value is adjusted between the 2-5, add bortz powder and surfactant and dispersion stabilizer, again the pH value is adjusted to the scope of 3-11, adopt ultrasonic dispersion and dispersed with stirring bortz powder at last.
Chinese invention patent 92101780.4 adopts multiple additives such as coupling agent, binding agent, dispersant, surfactant, grinding aid to disperse bortz powder, and wherein dispersant adopts ethylene glycol, sodium phosphate trimer, silicate.
The method that Japan Patent JP8257898 proposes is: make the diamond particles surface lotus that becomes positively charged by adding iron chloride earlier, adding a kind of anion surfactant then becomes electroneutral individual particle, adds another kind of anion surfactant again and makes it abundant dispersion.
Japan Patent JP62043482 adopts water soluble dispersing agents such as pyrrolidones, polyethylene glycol simultaneously, surfactants such as sulfo-amber acid ester salt, alkylbenzenesulfonate, and water soluble polymer disperses bortz powder as viscosity-controlling agent.
This shows, existingly in aqueous medium, disperse adamantine method, all adopt the compound mode of multiple additives, operating procedure comparatively loaded down with trivial details basically, complex process.
The object of the invention is to provide a kind of prescription and the simple diamond nano powder process for dispersing of technology, is used for the production processes such as preparation of lapping liquid or polishing fluid.
Summary of the invention
According to the present invention, in deionized water or distilled water, the sodium pyrophosphate that adds entry weight 0.01～5%, the diamond nano powder that adds entry weight 0.01～5% again, ultrasonic dispersion 1～20 minute, add the polyethylene glycol (or gum arabic powder or carboxymethyl cellulose) of entry weight 0.0001～1% again, ultrasonic again dispersion 1～20 minute promptly obtains the finely disseminated Nano diamond hydrosol.
The present invention only adopts two kinds of dispersants of sodium pyrophosphate and polyethylene glycol (or gum arabic powder or carboxymethyl cellulose) to cooperate, and prescription and technology is simple, disperse fully, and can stablize for a long time.
The specific embodiment
Embodiment 1: in the 50ml deionized water, add the 0.02g sodium pyrophosphate, add the diamond superfine powder of 0.05g again, ultrasonic dispersion 5 minutes adds the polyethylene glycol of 0.01g again, and ultrasonic again dispersion 15 minutes promptly obtains nanodiamond liquid dispersion.Obtaining average grain diameter through dynamic light scattering laser particle size analyzer mensuration is 57.4nm, maximum particle size 144.61nm.
Embodiment 2: in the 50ml deionized water, add the 0.03g sodium pyrophosphate, add the diamond superfine powder of 0.05g again, ultrasonic dispersion 5 minutes adds the gum arabic powder of 0.007g again, and ultrasonic again dispersion 20 minutes promptly obtains nanodiamond liquid dispersion.Obtaining average grain diameter through dynamic light scattering laser particle size analyzer mensuration is 60.5nm, maximum particle size 156.72nm.
Embodiment 3: in the 500ml deionized water, add the 0.35g sodium pyrophosphate, add the diamond superfine powder of 1g again, ultrasonic dispersion 2 minutes adds the carboxymethyl cellulose of 0.01g again, and ultrasonic again dispersion 20 minutes promptly obtains nanodiamond liquid dispersion.Obtaining average grain diameter through dynamic light scattering laser particle size analyzer mensuration is 63.0nm, maximum particle size 175.37nm.
Claims (2)
1. the process for dispersing of a diamond nano powder is characterized in that, adopts sodium pyrophosphate as main dispersant, is aided with dispersion stabilizer again, and diamond nano powder is disperseed in water, and dispersion steps is as follows:
1) the dispersant sodium pyrophosphate is dissolved in the deionized water, the weight percent concentration of solution is between 0.01～5%;
2) add the diamond nano powder of entry weight 0.01～5%;
3) ultrasonic dispersion is 1～20 minute;
4) add the dispersion stabilizer of entry weight 0.0001～1%, dispersion stabilizer is polyethylene glycol, gum arabic powder, carboxymethyl cellulose thrin;
5) ultrasonic again 1～20 minute, obtain the diamond hydrosol of average grain diameter at nanoscale.
2. the process for dispersing of diamond nano powder according to claim 1 is characterized in that, dispersed diamond nano powder prepares by the detonation method is synthetic, and has passed through purification processes before disperseing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510098707 CN1927436A (en) | 2005-09-07 | 2005-09-07 | Dispersion method for diamond nano powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510098707 CN1927436A (en) | 2005-09-07 | 2005-09-07 | Dispersion method for diamond nano powder |
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| CN1927436A true CN1927436A (en) | 2007-03-14 |
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| CN 200510098707 Pending CN1927436A (en) | 2005-09-07 | 2005-09-07 | Dispersion method for diamond nano powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235091B (en) * | 2007-12-26 | 2010-06-16 | 广州大学 | Methylcellulose-nano diamond derivatives, preparation method and use thereof |
| CN101280452B (en) * | 2007-12-26 | 2011-02-23 | 浣石 | Nickel-nanodiamond composite plating solution and preparation thereof |
| CN110283502A (en) * | 2019-03-25 | 2019-09-27 | 复旦大学 | A kind of scratch resistance water varnish composition and its preparation method and application |
| CN110357090A (en) * | 2019-07-19 | 2019-10-22 | 广东工业大学 | A kind of preparation method of the Nano diamond hydrosol |
-
2005
- 2005-09-07 CN CN 200510098707 patent/CN1927436A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235091B (en) * | 2007-12-26 | 2010-06-16 | 广州大学 | Methylcellulose-nano diamond derivatives, preparation method and use thereof |
| CN101280452B (en) * | 2007-12-26 | 2011-02-23 | 浣石 | Nickel-nanodiamond composite plating solution and preparation thereof |
| CN110283502A (en) * | 2019-03-25 | 2019-09-27 | 复旦大学 | A kind of scratch resistance water varnish composition and its preparation method and application |
| CN110357090A (en) * | 2019-07-19 | 2019-10-22 | 广东工业大学 | A kind of preparation method of the Nano diamond hydrosol |
| CN110357090B (en) * | 2019-07-19 | 2020-12-29 | 广东工业大学 | Preparation method of nano-diamond hydrosol |
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