CN101418142A - Titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature - Google Patents
Titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature Download PDFInfo
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- CN101418142A CN101418142A CNA2008102022480A CN200810202248A CN101418142A CN 101418142 A CN101418142 A CN 101418142A CN A2008102022480 A CNA2008102022480 A CN A2008102022480A CN 200810202248 A CN200810202248 A CN 200810202248A CN 101418142 A CN101418142 A CN 101418142A
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Abstract
The invention relates to a method for performing plasma modification treatment on the surface of titania nano powder under the condition of atmospheric pressure and normal temperature. The method comprises the following steps: the titania nano powder is placed on special transmission equipment of plasma treatment equipment; plasma is directly sprayed to the surface of the titania nano powder under the condition of the atmospheric pressure and open environment; and the titania nano powder moves in the plasma atmosphere, and surface modification of the titania nano powder is performed, wherein the power of plasma treatment of the titania nano powder is between 10 watts and 5,000 watts, and the time is between 0.01 and 6,000 seconds. The method can directly improve the surface property, the structure and the shape of the titania nano powder at one step under the condition of the atmospheric pressure and normal temperature, and has strong technological controllability and simple conversion technology, and the dry-method processing technology has low environmental pollution; and the surface of titania nano particles has the effect of magnetic attraction of two like magnetic poles, so that the possibility of reducing agglomeration of the nano particles is reduced.
Description
Technical field
The invention belongs to the preparation field of nano TiO 2 powder material, particularly relate to a kind of titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature.
Background technology
Technology such as normal temperature, atmospheric plasma body chemical vapor phase growing, ion implantation, sputter, plasma spraying, chemical polymerization, anodic oxidation obtain widespread use in fields such as aerospace, electronics, machinery.This new process for treating surface is being brought into play increasing effect in the nanometer engineering technology in recent years.
Normal temperature, atmospheric plasma are meant part or all of Ionized gas, comprise electronics, ion, also comprise high energy activeconstituentss such as free radical and photon.Normal temperature, atmospheric plasma have high energy, at a high speed, highly active advantage.Equilibrium relationship in nonequilibrium state normal temperature, the atmospheric plasma between electronic temp and ion temperature is false, and normal temperature, atmospheric plasma can have both effectively to be excited molecule, atom and preserve the characteristic that the material substrate molecule is not damaged; In the material surface improved performance, substrate performance is unaffected; Form the gaseous species and the plasma chemistry condition of plasma body by suitable selection. can carry out the purpose modification to the chemical structure and the physical structure of bill of material surface layer, and can realize the irrealizable reaction of traditional chemical reaction.
Because nano material has characteristics such as dimensional effect, surface effects, quantum effect, macro quanta tunnel effect, thereby shows the notable feature that is different from general macroscopic material at aspects such as optics, mechanics, electricity, magnetics, is developed rapidly in recent years.Nano TiO 2 powder and the nano-sized membrane aspects such as pollutent in the storage of sun power and utilization, opto-electronic conversion, the photochromic and big G﹠W of photocatalytic degradation have widespread use.Nano-anatase phase TiO
2Because of have the high and anti-photoetch of photocatalytic activity, chemical property is stable, indissoluble is nontoxic and advantage such as applied range, is a kind of comparatively ideal conductor photocatalysis material.It generates electronics one hole under ultraviolet light irradiation right, produces corresponding active oxygen (as OH base, mistake oxonium ion), and its oxidation capacity is also higher than ozone, so nano-TiO
2Photocatalyst material have from clean, eliminate multiple functions such as environmental pollutant, antibiotic and deodorizing.In recent years, when the nano titanium oxide synthesis technique constantly makes further progress, the research of aftertreatment technology also has been subjected to attention.Early stage is by coating the application performance that certain compound improves nano titanium oxide on the nano titanium oxide surface: weather resisteant, photostabilization, dispersiveness, surfactivity etc.To existing many relevant report and the application of nano titanium oxide surface modification, the surface modifying method of nano titanium oxide mainly is divided into liquid phase method and vapor phase process two big classes.Inorganic coating is finished with liquid-phase coprecipitation, and organic absorption is then finished when comminution by gas stream.No matter nano-titanium dioxide powder is in preparation or the use, all may cause reuniting, and wherein drying and calcining process are the master operations that causes hard aggregation between nano-titania particle.For alleviating nano-TiO
2The reunion degree, Chinese invention patent 03152887.2 at first prepares hydration TiO with liquid phase method
2Or TiO
2Crystal sol adds tensio-active agent again, makes SURFACTANT ADSORPTION at nano-TiO
2Heat-treat on the surface again.Though the liquid phase method synthesis device is simple, technology is time-consuming loaded down with trivial details, pollutes greatly, and batch operation, high-temperature calcination process very easily make hard aggregation or sintering between nanoparticle, and the introducing of additives such as tensio-active agent can reduce the purity of product.
At home and abroad in the document, do not see the research report that the treatment process of utilizing normal atmosphere, normal-temperature plasma modification is improved the nano-titanium dioxide powder surface property as yet at present.
Summary of the invention
Technical problem to be solved by this invention provides a kind of titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature, present method is a dry method modification, can the directly modification of acquisition titanium dioxide nano powder surface of a step under normal atmosphere and room temperature, open environment.
Titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature of the present invention is shown in Fig. 2 titanium dioxide nano powder surface plasma modification device synoptic diagram, at first nano TiO 2 powder is placed on the dedicated transmissions device of apparatus for processing plasma, at normal atmosphere, under the open environment, directly plasma jet is arrived titanium dioxide nano powder surface, nano TiO 2 powder is moved in plasma atmosphere, the power of handling nano TiO 2 powder is 10W-5000W, time is 0.01s-6000s, produces the titanium dioxide nano powder surface modification.
Described nano TiO 2 powder is commercially available commodity.
Described apparatus for processing plasma (APPJ) is commercially available commodity.
Described plasma body is selected from one or more in helium, argon gas or the functional gas, and wherein helium, argon gas mol ratio are 50%-99.99%, and functional gas is 0.001～30%, the plasma body of flowing through simultaneously forms the district and forms plasma atmosphere.The purity of described helium or argon gas is 99.99%.
Described functional gas is SO
2Ammonia, oxygen, hydrogen, nitrogen, tetrafluoro-methane, carbonic acid gas, methane CH4, ethane C2H6, propane C3H8, butane C4H10, pentane C5H12, hexane C6H14, heptane C7H16, octane C8H18, nonane C9H20, decane C10H22, undecane C11H24, dodecane C12H26, tridecane C13H28, ethene (C2H4), propylene (C3H6), butylene (C4H8), amylene (C5H10), hexene (C6H12), propadiene (C3H4), divinyl (C4H6), isoprene (C5H8), hexatriene (C6H8), acetylene (C2H2), propine (C3H4), butine (C4H6), pentyne (C5H8), hexin (C6H10), heptyne (C7H12), octyne (C8H14), n-heptylacetylene (C9H16), decine (C10H18), undecyne (C11H20), tetrafluoroethylene and silane, various siloxane gas, the steam of methacrylic acid etc. or their composition gas.
Describedly under jet plasma atmosphere prerequisite, surface modification is carried out by the demand of difference requirement in the nano titanium oxide surface.
Described this method modified nano-titanium dioxide is applied to polymer modification, polymer composite modification and fiber.
Improve in the system of titanium dioxide nano powder surface performance in the treatment process of normal atmosphere, normal-temperature plasma modification, mainly comprise effect by plasma generation high energy active particle, nano titanium oxide surface are etched or activation, grafting etc. repel each other the nano titanium oxide surface generation same sex.Under jet plasma atmosphere prerequisite, form free radical and cause the surperficial nano titanium oxide surface modification that forms the free radical grafting reaction under certain condition with other materials and component and obtain of nano titanium oxide that further free radical causes thus, and because the radical polymerization that the nano titanium oxide surface free radical that plasma body causes causes is plasma body initiation atom transfer radical polymerization (ATRP).The plasma nano titanic oxide surface modification is a dry method modification, mainly adopts above-described gas and their mixed gas, and the plasma body that utilizes normal atmosphere, normal-temperature plasma equipment to produce carries out surface treatment to nano titanium oxide.A common step of plasma surface modifying method finishes, and can realize the raising to the consistency of different rerum natura materials by adjusting the gaseous fraction, the proportioning that form plasma body.
Nano titanium oxide with this method modification can be applicable in polymer modification, polymer composite modification and the fiber.
Beneficial effect
(1) the inventive method process controllability is strong, and change technology is simple, technical process short, need not aftertreatment, and the level of automation height, and low, the continuous operations of energy consumption realize large-scale industrialization production and little to the pollution of environment easily;
(2) gained titania nanoparticles of the present invention surface produces the effect that the same sex is repelled each other, and reaches the possibility that reduces nanoparticle agglomerates;
(3) gained nano TiO 2 powder internal structure of the present invention is not destroyed, and its nano crystal particles uniformity coefficient and particle size distribution range narrow down, and the dispersiveness in associated materials improves, and improves with corresponding high molecular bonding properties.
Description of drawings
The transmission electron microscope photo of Fig. 1 gained sample;
Fig. 2 titanium dioxide nano powder surface plasma modification device synoptic diagram, 1 plasma body carrier gas (helium or argon gas), 2 functional gases, 3 plasma body generation Controlling System, 4 plasma generators and shower nozzle, 5 nano-powder e Foerderanlages, 6 are equipped with not surface treating nano powder, and 7 are equipped with surface-treated nano-powder;
Fig. 3 handles sample: No. 1 is the former powder helium plasma treatment of nano titanium oxide sample, and No. 2 is the former powder oxygen plasma treatment of nano titanium oxide sample, and No. 3 is the former powder of nano titanium oxide.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
Get on the dedicated transmissions device that a certain amount of commercialization nano TiO 2 powder is placed on apparatus for processing plasma.Synoptic diagram such as Fig. 2 passage of plasma nozzle (or install additional), this container or carrier place normal pressure 2 centimetres of the spout below specific ranges of normal-temperature plasma jet apparatus with interior (design of nozzle segment passage is by particular requirement), nano-powder lay thickness is by 5 millimeters thickness laies, under the prerequisite of opening normal pressure, room-temperature plasma, container or carrier are done the motion of specific speed. realize that nano-titanium dioxide powder obtains handling under helium plasma atmosphere, 40 watts of power and 5 second time.Transmission electron microscope photo such as Fig. 1 of this sample.The water-sol (0.5/1000 nano powder/water) that is formed by this sample leaves standstill 24 hours contrast experiment's photos such as Fig. 3-No. 1 sample.
Embodiment 2
Get on the dedicated transmissions device that a certain amount of commercialization nano TiO 2 powder is placed on apparatus for processing plasma.Synoptic diagram such as Figure 12 passage of plasma nozzle (or install additional), this container or carrier place normal pressure 2 centimetres of the spout below specific ranges of normal-temperature plasma jet apparatus with interior (design of nozzle segment passage is by particular requirement), nano-powder lay thickness is by 5 millimeters thickness laies, under the prerequisite of opening normal pressure, room-temperature plasma, container or carrier are done the motion of specific speed. realize that nano-titanium dioxide powder obtains handling under oxygen gas plasma atmosphere, 40 watts of power and 5 second time.Transmission electron microscope photo such as Fig. 1 of this sample.The water-sol (0.5/1000 nano powder/water) that is formed by this sample leaves standstill 24 hours contrast experiment's photos such as Fig. 3-No. 2 sample.
Claims (6)
1. titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature comprises:
Nano TiO 2 powder is placed on the dedicated transmissions device of apparatus for processing plasma, at normal atmosphere, under the open environment, directly plasma jet is arrived titanium dioxide nano powder surface, nano TiO 2 powder is moved in plasma atmosphere, the power of handling nano TiO 2 powder is 10W-5000W, and the time is 0.01s-6000s, produces the titanium dioxide nano powder surface modification.
2. titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature according to claim 1, it is characterized in that: described plasma body is selected from one or more in helium, argon gas or the functional gas, wherein helium, argon gas mol ratio are 50%-99.99%, and functional gas is 0.001～30%, the plasma body of flowing through simultaneously forms the district and forms plasma atmosphere.
3. titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature according to claim 2 is characterized in that: the purity of described helium or argon gas is 99.99%.
4. titanium dioxide nano powder surface plasmer modification treatment method at atmosphere and normal temperature according to claim 2 is characterized in that: described functional gas is SO
2Ammonia, oxygen, hydrogen, nitrogen, tetrafluoro-methane, carbonic acid gas, methane CH4, ethane C2H6, propane C3H8, butane C4H10, pentane C5H12, hexane C6H14, heptane C7H16, octane C8H18, nonane C9H20, decane C10H22, undecane C11H24, dodecane C12H26, tridecane C13H28, ethene (C2H4), propylene (C3H6), butylene (C4H8), amylene (C5H10), hexene (C6H12), propadiene (C3H4), divinyl (C4H6), isoprene (C5H8), hexatriene (C6H8), acetylene (C2H2), propine (C3H4), butine (C4H6), pentyne (C5H8), hexin (C6H10), heptyne (C7H12), octyne (C8H14), n-heptylacetylene (C9H16), decine (C10H18), undecyne (C11H20), tetrafluoroethylene and silane, various siloxane gas, vinylformic acid, the steam of methacrylic acid or their composition gas.
5. according to the described method of arbitrary claim among the claim 1-4, it is characterized in that; Under jet plasma atmosphere prerequisite, surface modification is carried out by the demand of difference requirement in the nano titanium oxide surface.
6. according to the described method of arbitrary claim among the claim 1-4, it is characterized in that; This method modified nano-titanium dioxide is applied to polymer modification, polymer composite modification and fiber.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114649A (en) * | 2011-12-05 | 2014-10-22 | 索尔维公司 | Use of atmospheric plasma for the surface of inorganic particles and inorganic particles comprising an organic fluorine-containing surface modification |
| CN106115874A (en) * | 2016-08-08 | 2016-11-16 | 马骧彬 | A kind of ion generator |
| CN106398619A (en) * | 2016-10-12 | 2017-02-15 | 武汉鼎丰设备备件材料有限公司 | Quick nanoscale metal repairing agent |
| CN106433548A (en) * | 2016-10-12 | 2017-02-22 | 武汉鼎丰设备备件材料有限公司 | Special instantaneous self-healing seal |
| CN108373787A (en) * | 2016-11-10 | 2018-08-07 | 广西真龙彩印包装有限公司 | A kind of hydrophobic fast light UV-LED cured gloss oils of paper wrapper printed matter |
| CN108946699A (en) * | 2018-07-18 | 2018-12-07 | 安徽江淮汽车集团股份有限公司 | A kind of preparation method of modified fullerenes material |
-
2008
- 2008-11-05 CN CNA2008102022480A patent/CN101418142A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114649A (en) * | 2011-12-05 | 2014-10-22 | 索尔维公司 | Use of atmospheric plasma for the surface of inorganic particles and inorganic particles comprising an organic fluorine-containing surface modification |
| CN106115874A (en) * | 2016-08-08 | 2016-11-16 | 马骧彬 | A kind of ion generator |
| CN106398619A (en) * | 2016-10-12 | 2017-02-15 | 武汉鼎丰设备备件材料有限公司 | Quick nanoscale metal repairing agent |
| CN106433548A (en) * | 2016-10-12 | 2017-02-22 | 武汉鼎丰设备备件材料有限公司 | Special instantaneous self-healing seal |
| CN108373787A (en) * | 2016-11-10 | 2018-08-07 | 广西真龙彩印包装有限公司 | A kind of hydrophobic fast light UV-LED cured gloss oils of paper wrapper printed matter |
| CN108946699A (en) * | 2018-07-18 | 2018-12-07 | 安徽江淮汽车集团股份有限公司 | A kind of preparation method of modified fullerenes material |
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Open date: 20090429 |