CN1687250A - Surface modifying of ultramicro powder of cerium oxide and dispersing method - Google Patents
Surface modifying of ultramicro powder of cerium oxide and dispersing method Download PDFInfo
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- CN1687250A CN1687250A CN 200510038751 CN200510038751A CN1687250A CN 1687250 A CN1687250 A CN 1687250A CN 200510038751 CN200510038751 CN 200510038751 CN 200510038751 A CN200510038751 A CN 200510038751A CN 1687250 A CN1687250 A CN 1687250A
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- cerium oxide
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- dispersing method
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Abstract
The present invention relates to a surface modification of supermicro cerium oxide powder body and its dispersion method. Said invention includes the following steps: adopting surfactant stearic acid to cover the surface of nano cerium oxide, using absolute ethyl alcohol to pre-dissolve stearic acid to colorless transparent state, pre-moistening nano cerium oxide powder body, mixing them and controlling reaction temperature in boiling state, slowly stirring in the course of reaction, retaining reflux state, controlling reaction time for 6-12 hr, adopting vacuum filtration or centrifugal separation, vacuum drying temperature is cotnrolled at 50-80 deg.C, extruding and granulating by utilizing twin screw extruder, and its machine head temperature is controlled at 190-200 deg.C.
Description
One technical field
The present invention relates to the surface modification and the dispersing method thereof of a kind of surface treatment method of oxide nano rare earth, particularly a kind of ultramicro powder of cerium oxide.
One, background technology
Nano material is meant to have at least one dimension to be in nanoscale (1～100nm) scope or the material that is made of as elementary cell them in three-dimensional space.Because surface effects, quantum effect, small-size effect and macro quanta tunnel effect produce the many special propertys different with the conventional solid material thus, become the research focus in the Materials science in recent years.Consequent nanometer science and technology be one involve a wide range of knowledge, the emerging research field of multidisciplinary intersection, obtained develop rapidly and be subjected to the extensive concern of society in worldwide in recent years.
Oxide nano rare earth is owing to the electron structure of the active 4f of rare earth element shows excellent application performance.Such as extinction characteristic, fluorescent characteristic, photoluminescence, electroluminescent etc.Nano-cerium oxide has excellent using value in all many-sides such as glass, pottery, luminescent material and purifying vehicle exhausts.But the performance of nano-cerium oxide performance depends on its dispersion situation.Nano-cerium oxide is the same as its extremely high surface energy is easy to reunite with other nanoparticle, simultaneously because its surface tension is big, makes its Gao Juzhong at low surface tension be difficult for disperseing, thereby has limited application.At present both at home and abroad in this respect work all there is certain research, but all rests on laboratory stage, also have certain distance from real industrialization.
Two summary of the invention
The object of the invention is to provide a kind of can pass through surface modification, reduce the surface tension of nano-cerium oxide particle, improve its dispersing property in the superpolymer polypropylene, solve the surface modification and the dispersing method thereof of the ultramicro powder of cerium oxide of the fracture of wire problem in the polypropylene spinning production.
The technical solution that realizes the object of the invention is: a kind of surface modification of ultramicro powder of cerium oxide and dispersing method thereof, it is characterized in that adopting the hard ester acid of tensio-active agent that nano-cerium oxide is carried out the surface parcel handles, with dehydrated alcohol that hard ester acid is pre-molten to the water white transparency shape, nano cerium oxide powder is soaked into processing in advance, the hybrid reaction temperature is controlled at boiling state, stir at a slow speed in the reaction, keep reflux state, reaction times is controlled at 6-12h, vacuum filtration or centrifugation, the vacuum-drying temperature is controlled at 50-80 ℃, and head temperature is controlled at 190-200 ℃ during the twin screw extruder extruding pelletization.
Principle of the present invention is: hard ester acid is a kind of excellent surfactant, using appropriate process can make it be wrapped in the surface of nano-cerium oxide particle, reduce its surface tension, according to the similar principle that mixes, capillary reduction helps the dispersion of nano-cerium oxide particle in superpolymer.Nano-cerium oxide particle of the present invention, after surface modification, it is many that contact angle experiments shows that its surface tension reduces, sedimentation experiment shows that it has good dispersion stabilization in the solubility parameter turps similar to polypropylene, SEM experiment show its again in the polypropylene dispersiveness be greatly improved, the polypropylene spinning experiment shows that it has solved the fracture of wire problem in producing substantially.
The present invention compares with present similar technology, and its remarkable advantage is:
1, technology is simple, and is easy to operate;
2, dispersion effect is good, and is with low cost;
3, good with high polymer cemented performance, be of value to the performance of nano material excellent properties.
Four description of drawings
Accompanying drawing is the surface modification and the dispersing method schematic flow sheet thereof of ultramicro powder of cerium oxide of the present invention.
Five embodiments
Below in conjunction with accompanying drawing the present invention is further described.
Specific embodiment by flow process shown in the accompanying drawing is:
Embodiment 1:
The first step: accurately the hard ester acid of weighing 1g is pre-molten to water white transparency with the dehydrated alcohol of 80ml.Accurate weighing nano cerium oxide powder 5g puts into the there-necked flask that the 420ml dehydrated alcohol is housed and soaks into 10min.
Second step: above-mentioned two kinds of solution are mixed and heated to boiling, and magnetic force stirs at a slow speed, keeps reflux state, reaction 12h.
The 3rd step: answer liquid to take out vacuum filtration.
The 4th step: it is dry that filter cake is put into 60 ℃ of vacuum drying ovens, grinds.
The 5th the step: with nano cerium oxide powder after the modification by 1% (wt) than doping in the polypropylene agglomerate, premix is even, puts into the twin screw extruder extruding pelletization.Head temperature is controlled at 195 ℃.
Embodiment 2:
The first step: accurately the hard ester acid of weighing 1g is pre-molten to water white transparency with the dehydrated alcohol of 50ml.Accurate weighing nano cerium oxide powder 5g puts into the there-necked flask that the 450ml dehydrated alcohol is housed and soaks into 20min.
Second step: above-mentioned two kinds of solution are mixed and heated to boiling, and magnetic force stirs at a slow speed, keeps reflux state, reaction 12h.
The 3rd step: answer liquid to take out vacuum filtration.
The 4th step: it is dry that filter cake is put into 60 ℃ of vacuum drying ovens, grinds.
The 5th the step: with nano cerium oxide powder after the modification by 1% (wt) than doping in the polypropylene agglomerate, premix is even, puts into the twin screw extruder extruding pelletization.Head temperature is controlled at 195 ℃.
Embodiment 3:
The first step: accurately the hard ester acid of weighing 1g is pre-molten to water white transparency with the dehydrated alcohol of 100ml.Accurate weighing nano cerium oxide powder 4g puts into the there-necked flask that the 400ml dehydrated alcohol is housed and soaks into 10min.
Second step: above-mentioned two kinds of solution are mixed and heated to boiling, and magnetic force stirs at a slow speed, keeps reflux state, reaction 12h.
The 3rd step: answer liquid to take out vacuum filtration.
The 4th step: it is dry that filter cake is put into 70 ℃ of vacuum drying ovens, grinds.
The 5th the step: with nano cerium oxide powder after the modification by 1% (wt) than doping in the polypropylene agglomerate, premix is even, puts into the twin screw extruder extruding pelletization.Head temperature is controlled at 195 ℃.
Embodiment 4:
The first step: accurately the hard ester acid of weighing 1g is pre-molten to water white transparency with the dehydrated alcohol of 80ml.Accurate weighing nano cerium oxide powder 5g puts into the there-necked flask that the 420ml dehydrated alcohol is housed and soaks into 10min.
Second step: above-mentioned two kinds of solution are mixed and heated to boiling (78 ℃), and magnetic force stirs at a slow speed, keeps reflux state, reaction 9h.
The 3rd step: answer liquid to take out vacuum filtration.
The 4th step: it is dry that filter cake is put into 60 ℃ of vacuum drying ovens, grinds.
The 5th the step: with nano cerium oxide powder after the modification by 1% (wt) than doping in the polypropylene agglomerate, premix is even, puts into the twin screw extruder extruding pelletization.Head temperature is controlled at 200 ℃.
Claims (5)
1, a kind of surface modification of ultramicro powder of cerium oxide and dispersing method thereof, it is characterized in that: adopt the hard ester acid of tensio-active agent that nano-cerium oxide is carried out the surface parcel and handle, with dehydrated alcohol that hard ester acid is pre-molten to the water white transparency shape, nano cerium oxide powder is soaked into processing in advance, the hybrid reaction temperature is controlled at boiling state, stir at a slow speed in the reaction, keep reflux state, reaction times is controlled at 6-12h, vacuum filtration or centrifugation, the vacuum-drying temperature is controlled at 50-80 ℃, and head temperature is controlled at 190-200 ℃ during the twin screw extruder extruding pelletization.
2, the surface modification of a kind of ultramicro powder of cerium oxide according to claim 1 and dispersing method thereof is characterized in that the temperature of reacting is controlled at boiling state.
3, the surface modification of a kind of ultramicro powder of cerium oxide according to claim 1 and 2 and dispersing method thereof is characterized in that the time of reacting is controlled at 6-12h.
4,, it is characterized in that vacuum drying temperature is controlled at 50-80 ℃ according to the surface modification and the dispersing method thereof of claim 1 or 2 or 3 described a kind of ultramicro powder of cerium oxide.
5,, it is characterized in that nano cerium oxide powder after the modification mixes with polypropylene that head temperature is controlled at 190-200 ℃ when extruding according to the surface modification and the dispersing method thereof of the described a kind of ultramicro powder of cerium oxide of one of claim 1～5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038751 CN1687250A (en) | 2005-04-07 | 2005-04-07 | Surface modifying of ultramicro powder of cerium oxide and dispersing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510038751 CN1687250A (en) | 2005-04-07 | 2005-04-07 | Surface modifying of ultramicro powder of cerium oxide and dispersing method |
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| CN1687250A true CN1687250A (en) | 2005-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510038751 Pending CN1687250A (en) | 2005-04-07 | 2005-04-07 | Surface modifying of ultramicro powder of cerium oxide and dispersing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107383595A (en) * | 2017-07-17 | 2017-11-24 | 厦门稀土材料研究所 | A kind of anti-ultraviolet polypropene composition and its polypropylene and polypropylene film of preparation |
| CN111471217A (en) * | 2020-05-12 | 2020-07-31 | 上海应用技术大学 | Modified nano cerium oxide and preparation method thereof, and modified nano cerium oxide flame-retardant polyformaldehyde and preparation method thereof |
-
2005
- 2005-04-07 CN CN 200510038751 patent/CN1687250A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107383595A (en) * | 2017-07-17 | 2017-11-24 | 厦门稀土材料研究所 | A kind of anti-ultraviolet polypropene composition and its polypropylene and polypropylene film of preparation |
| CN107383595B (en) * | 2017-07-17 | 2019-10-01 | 厦门稀土材料研究所 | A kind of anti-ultraviolet polypropene composition and its polypropylene and polypropylene film of preparation |
| CN111471217A (en) * | 2020-05-12 | 2020-07-31 | 上海应用技术大学 | Modified nano cerium oxide and preparation method thereof, and modified nano cerium oxide flame-retardant polyformaldehyde and preparation method thereof |
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