CN108101092A - A kind of preparation method of calcium carbonate rod-like nano particle package assembly - Google Patents
A kind of preparation method of calcium carbonate rod-like nano particle package assembly Download PDFInfo
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- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/50—Agglomerated particles
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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Abstract
A kind of preparation method of calcium carbonate rod-like nano particle package assembly, includes the following steps：Calcium oxide particle is scattered in deionized water, complexed surfactant is added in, stirs evenly, feed liquid is handled under microwave, and feed liquid introduces the liquid feeding end of atomizer, and carbon dioxide is introduced to the inlet end of atomizer, it under ultrasound condition, sprays, centrifuges to feed liquid, take clear liquid, high speed centrifugation, deionized water washing, again disperse in deionized water, strength combination of ultrasound centrifuge washing, is repeated 3 times, and obtains calcium carbonate rod-like nano particle package assembly.
Description
Technical field
The invention belongs to calcium carbonate material preparation fields, and in particular to a kind of to prepare calcium carbonate rod-like nano particle assembling knot
The method of structure.
Background technology
Calcium carbonate is widely used in the industries such as rubber, plastics, coating, papermaking, ink, crafty dose of glue, fluid sealant, can also apply
In industries such as toothpaste, food, medicine, word material, building materials, chemical fibres.The crystal form of calcium carbonate includes calcite, aragonite, three kinds of vaterite
Type, wherein calcite structure is most stable, and aragonite and vaterite belong to unstable state.
Calcium carbonate all will as a kind of important plastic filler, grain size, particle homogeneity, specific surface area and surface state
The property of its compatibility high molecular with matrix and the mechanical property of filling-modified material is influenced, how easily to be disperseed, grain
It is still the target pursued in industry to spend homogeneous, high surface activity nano-calcium carbonate and its package assembly.
The content of the invention
The technical scheme is that in order to overcome the shortcoming of prior art, propose a kind of to prepare that calcium carbonate is rodlike to be received
The method of rice grain package assembly.
The present invention proposes a kind of preparation method of calcium carbonate rod-like nano particle package assembly, includes the following steps：
1) calcium oxide particle that grain size is 1-1.5 μm is scattered in deionized water, adds in complexed surfactant, stirring
Uniformly；
2) feed liquid that step 1) obtains is handled into 40-50min under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary, obtain calcium carbonate rod-like nano particle；
5) disperse in deionized water again, strength combination of ultrasound centrifuge washing is repeated 3 times, obtains calcium carbonate rod-like nano
Particle package assembly.
Wherein, the complexed surfactant is by dodecyl benzyl dimethyl ammonium chloride and dodecyl polyoxyethylene groups
Amion acetic acid into.
Wherein, the power of microwave is 500-600W.
Wherein, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl polyoxyethylene groups amion acetic acid rub
You are than being 1: 0.3-0.5: 0.2-0.5.
Wherein, in step 1), the mass ratio of calcium oxide and deionized water is 1: 250-400.
Wherein, in step 3), the charge ratio of feed liquid and carbon dioxide is 1g: 200-400mL.
Wherein, in step 4), it is 3000-5000rpm to control centrifuge RPMs.
Wherein, in step 3), ultrasonic power 150-200W.
Wherein, in step 4), high speed centrifugation revolution is 6000-8000rpm.
Wherein, in step 5), strength ultrasonic power is 450-650W.
The present invention makes calcium oxide surface layer constantly form calcium hydroxide simultaneously using the aquation of microwave condition control calcium oxide particle
It is dissolved into aqueous solution, complexed surfactant is had an effect with calcium ion, and it is rodlike that it is induced to be formed in carburizing reagent
Nano particle.By regulating and controlling microwave power and time, the speed of calcium oxide particle aquation in solution can be adjusted, and then is adjusted molten
The concentration of calcium ion in liquid.Calcium hydroxide in solution is with carbon dioxide reaction under conditions of ullrasonic spraying, and feed liquid is in turbulent flow
Under the conditions of by great amount of carbon dioxide gas impact, sweep along, minimum drop is separated by carbon dioxide under ultrasonication, ultrasound
The moment that gas-liquid phase materials are promoted in contact reacts, and is conducive to avoid the reunion of particle during the reaction.Using
Complexed surfactant is incorporated into particle surface, stable particle, avoid reunite while, induction calcium carbonate formed it is rodlike.
Under the action of strength ultrasound, the energy that acoustic energy generates becomes minute bubbles intensive one by one by liquid medium, these are stingy
Bubble is burst rapidly, and part surface activating agent is caused to come off from particle surface, particle surface energy is caused to rise, and then is assembled into porous
Micron sphere.Due to primary granule size uniform, the two level package assembly size of formation is also more uniform.
Beneficial effects of the present invention：This method uses the gas that is atomized as feed liquid of carbon dioxide, compared to after atomization again
It is contacted with carbon dioxide, obtained product particle size is more homogeneous.Microwave method activation combines instantaneous under ullrasonic spraying
Reaction so that granule surface activity point is more, and reaction is fast, causes particle surface rough and uneven in surface, more identical size, the particle ratio of pattern
Surface area significantly increases.The rodlike calcium carbonate that length is about 300-600nm is obtained, after assembled, forms about 6-11 microns more
Hole chondritic.
Specific embodiment
With reference to embodiment, further illustrate the present invention.
Embodiment 1
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary, calcium carbonate rod-like nano particle is obtained, length is about 510nm, and particle is more homogeneous；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times, it is rodlike to obtain calcium carbonate
The package assembly of nano particle.
Embodiment 2
1) calcium oxide particle that grain size is 1.5 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 400, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.5: 0.5；
2) feed liquid that step 1) obtains is handled into 50min, microwave power 600W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 400mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary, calcium carbonate rod-like nano particle is obtained, length is about 450nm, and particle is more homogeneous；
5) again in scattered and deionized water, 650W strength combination of ultrasound centrifuge washings are repeated 3 times, it is rodlike to obtain calcium carbonate
The package assembly of nano particle.
Embodiment 3
1) calcium oxide particle that grain size is 2 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary, obtain calcium oxide/calcium carbonate core shell nanoparticles；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 4
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 150, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 5
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 500, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 6
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 400W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 7
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 700W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 8
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 30min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 9
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 100mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 10
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 500mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 11
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.1: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 12
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.7: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 13
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.1；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 14
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.7；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary；
5) again in scattered and deionized water, 450W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 15
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary, calcium carbonate rod-like nano particle is obtained, length is about 510nm, and particle is more homogeneous；
5) again in scattered and deionized water, 300W strength combination of ultrasound centrifuge washings are repeated 3 times.
Embodiment 16
1) calcium oxide particle that grain size is 1 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；Calcium oxide and the mass ratio of deionized water are 1: 250, calcium oxide and dodecyl benzyl dimethyl ammonium chloride, dodecyl
The molar ratio of polyoxyethylene groups amion acetic acid is 1: 0.3: 0.2；
2) feed liquid that step 1) obtains is handled into 40min, microwave power 500W under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced atomizer
Inlet end under ultrasound condition, sprays to feed liquid；The charge ratio of feed liquid and carbon dioxide is 1g: 200mL；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water washing 2-3
It is secondary, calcium carbonate rod-like nano particle is obtained, length is about 510nm, and particle is more homogeneous；
5) again in scattered and deionized water, 750W strength combination of ultrasound centrifuge washings.
The pattern for the product that embodiment 1-16 is obtained is shown in Table 1.
Table 1
Embodiment 17
Using the technique of embodiment 1, parameter, the carrier gas of ultrasonic atomizatio in embodiment 1 is only replaced with into nitrogen, after making atomization
Liquid and carbon dioxide counter current contacting.Product is obtained as the inhomogenous particle of size, it is assembled, only randomly reunited
Body.
Claims (10)
1. a kind of preparation method of calcium carbonate rod-like nano particle package assembly, which is characterized in that include the following steps：
1) calcium oxide particle that grain size is 1-1.5 μm is scattered in deionized water, adds in complexed surfactant, stirring is equal
It is even；
2) feed liquid that step 1) obtains is handled into 40-50min under microwave；
3) feed liquid for obtaining step 2) introduces the liquid feeding end of atomizer, and carbon dioxide is introduced to the air inlet of atomizer
End, under ultrasound condition, sprays to feed liquid；
4) feed liquid after spraying is collected, controls the revolution of centrifugation, takes clear liquid, high speed centrifugation, deionized water is washed 2-3 times；
5) disperse in deionized water again, strength combination of ultrasound centrifuge washing is repeated 3 times, and obtains calcium carbonate rod-like nano particle
Package assembly.
2. according to the method described in claim 1, it is characterized in that：The complexed surfactant is by dodecyl dimethyl benzyl
Ammonium chloride and dodecyl polyoxyethylene groups amion acetic acid composition.
3. according to the method described in claim 1, it is characterized in that：The power of microwave is 500-600W.
4. according to the method described in claim 2, it is characterized in that：Calcium oxide and dodecyl benzyl dimethyl ammonium chloride, ten
The molar ratio of dialkyl group polyoxyethylene groups amion acetic acid is 1: 0.3-0.5: 0.2-0.5.
5. according to the method described in claim 1, it is characterized in that：In step 1), the mass ratio of calcium oxide and deionized water is 1
∶250-400。
6. according to the method described in claim 1, it is characterized in that：In step 3), the charge ratio of feed liquid and carbon dioxide is 1g:
200-400mL。
7. according to the method described in claim 1, it is characterized in that：In step 4), it is 3000-5000rpm to control centrifuge RPMs.
8. according to the method described in claim 1, it is characterized in that：In step 3), ultrasonic power 150-200W.
9. according to the method described in claim 1, it is characterized in that：In step 4), high speed centrifugation revolution is 6000-8000rpm.
10. according to the method described in claim 1, it is characterized in that：In step 5), strength ultrasonic power is 450-650W.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130164206A1 (en) * | 2011-12-27 | 2013-06-27 | Hankuk Paper Mfg, Co, Ltd. | Calcium carbonate having a surface charge, the preparing process thereof and filler for producing a paper using the same |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130164206A1 (en) * | 2011-12-27 | 2013-06-27 | Hankuk Paper Mfg, Co, Ltd. | Calcium carbonate having a surface charge, the preparing process thereof and filler for producing a paper using the same |
Non-Patent Citations (2)
| Title |
|---|
| 聂颖等: ""纳米碳酸钙的生产工艺及改性技术进展"", 《化工文摘》 * |
| 蒋惠亮等: ""表面活性剂对纳米碳酸钙结晶过程的影响"", 《日用化学工业》 * |
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