CN103462219A - Cigarette filter containing ultralong TiO2 aquo-complex nanotube - Google Patents
Cigarette filter containing ultralong TiO2 aquo-complex nanotube Download PDFInfo
- Publication number
- CN103462219A CN103462219A CN2013102106909A CN201310210690A CN103462219A CN 103462219 A CN103462219 A CN 103462219A CN 2013102106909 A CN2013102106909 A CN 2013102106909A CN 201310210690 A CN201310210690 A CN 201310210690A CN 103462219 A CN103462219 A CN 103462219A
- Authority
- CN
- China
- Prior art keywords
- cigarette filter
- tio
- cigarette
- filtration layer
- acetate fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to the field of cigarette filters, in particular to a cigarette filter containing an ultralong TiO2 aquo-complex nanotube. The cigarette filter contains an adsorption filtration layer, wherein the adsorption filtration layer is formed by the TiO2 aquo-complex nanotube and cellulose acetate fiber; the content of the TiO2 aquo-complex nanotube in the adsorption filtration layer is not less than 0.01 wt% of the total mass of the cellulose acetate fiber of the cigarette filter; the length of the TiO2 aquo-complex nanotube is larger than or equal to 1 micrometer. The TiO2 aquo-complex nanotube has very strong capacity on adsorbing ammonia, and meanwhile, the ultralong TiO2 aquo-complex nanotube can be firmly interweaved and mixed with the cellulose acetate fiber, so that the defects that in the prior art, the degradation of ammonia and other components in main stream smoke of a cigarette is not obvious, and adsorbing agent is not easily interweaved and mixed with the cellulose acetate fiber are solved.
Description
Technical field
The present invention relates to the cigarette filter field, be specifically related to a kind of containing overlength TiO
2the cigarette filter of hydrate nanometer pipe and preparation thereof and purposes.
Background technology
Publication number CN1302570A discloses a kind of Dotoxicating tip filter for cigarette and production method thereof.Be characterized in that the absorption absorbed layer that adds layer of active carbon and calcium hydroxide to mix, make to adsorb absorbed layer and be close to filter course on the basis of existing filter tip filter course.
Publication number CN1383764A discloses a kind of the preparation containing the method for loess clay mineral cigarette and the cigarette product made thus.Be characterized in preparing the loess homogeneous suspension, this suspension is applied to cigarette filter, filler or encapsulation, subsequent drying.
Publication number CN101637307A discloses a kind of cigarette fiber filter tip of filtering off toxic matters and releasing microelement anions.Be characterized in that the nano-corpuscule made from chitin, tourmaline, medical stone, Organic Selenium, organic germanium, honeybee series of products mixture embeds the raw silk rings acetate fiber and makes cigarette filter.
Above-mentioned prior art has the following disadvantages: (1) is not obvious to the degraded of the compositions such as ammonia in cigarette mainstream flue gas; (2) adding material is particulate, is not easy to interweave and mix with acetate fiber, is not suitable for the large-scale production of cigarette filter.
Summary of the invention
The object of the invention is to overcome the defect of prior art, provide a kind of containing overlength TiO
2the cigarette filter of hydrate nanometer pipe, in cigarette burning and aspiration procedure, the compositions such as absorption ammonia of main stream smoke of cigarette.
Technical scheme of the present invention is: a kind of cigarette filter, contain the adsorption filtration layer, and described adsorption filtration layer is by acetate fiber and TiO
2the hydrate nanometer pipe forms.
Cigarette filter of the present invention can also comprise the conventional acetate fiber section consisted of acetate fiber fully.
Preferably, adsorption filtration layer of the present invention is full of whole described cigarette filter; Perhaps, described adsorption filtration layer is positioned at front end, middle part or the rear end of described cigarette filter; Jointly form described cigarette filter with the acetate fiber section formed by acetate fiber fully.Be that cigarette filter of the present invention is comprised of the acetate fiber section and the adsorption filtration layer that consist of acetate fiber fully, or formed by the adsorption filtration layer fully.
Preferably, TiO in described adsorption filtration layer
2the content of hydrate nanometer pipe is no less than the 0.01wt% of the total acetate fiber quality of cigarette filter.
More excellent, described TiO
20.01wt%～10wt% that the content of hydrate nanometer pipe is the total acetate fiber content of cigarette filter.
Because harm reduction cigarette filter of the present invention both can consist of the adsorption filtration layer fully, also can be spliced by acetate fiber section and adsorption filtration layer; Therefore, when the harm reduction cigarette filter consists of the adsorption filtration layer fully, the total acetate fiber content of cigarette filter of the present invention is the acetate fiber content in the adsorption filtration layer; When the harm reduction cigarette filter is spliced to form by acetate fiber section and adsorption filtration layer, the total acetate fiber content of cigarette filter of the present invention comprises the acetate fiber of acetate fiber section and acetate fiber two parts of adsorption filtration layer.
Preferably, described TiO
2the length of hydrate nanometer pipe is more than or equal to 1 micron, and diameter is 5～100nm.
More excellent, described TiO
2the length of hydrate nanometer pipe is 5～25 microns.
TiO of the present invention
2the preparation method of hydrate nanometer pipe is hydrothermal reaction at low temperature, take titanium dioxide and alkali as raw material, with low temperature, stirs hydro-thermal method, has prepared the overlength TiO of high dispersive
2the hydrate nanometer pipe.
TiO of the present invention
2the concrete preparation method of hydrate nanometer pipe is as follows:
1) by TiO
2be dissolved in aqueous slkali and obtain mixture, mixture is placed under 100～200 ℃ of autoclaves, with the rotating speed of 5～20r/min, carry out hydro-thermal reaction 18～96h;
2) reaction is collected the white precipitate product after finishing, and distilled water washs to neutrality, precipitated product is soaked in acid solution to 18～24h, and after reaction finishes, suction filtration washing precipitation, to neutral, are dried precipitation, obtain TiO
2the hydrate nanometer pipe.
In preparation method of the present invention as the TiO of raw material
2for business level TiO
2.Preferably, described TiO
2for P25 type nano titanium oxide.The described TiO that the present invention obtains
2hydrate is H
2ti
3o
7nH
2o; Preferably, the n value 1 or 2.
Preferably, in the described mixture of step 1), TiO
2mass percent be 0.1%～10%.
More excellent, in the described mixture of step 1), TiO
2mass percent be 0.13%～6.67%.
Preferably, the described aqueous slkali of step 1) is the NaOH aqueous solution or the KOH aqueous solution.
More excellent, the concentration of the described NaOH aqueous solution or the KOH aqueous solution is 8～12M.Most preferably be 10M.
Preferably, step 2) described acid solution is hydrochloric acid or nitric acid (hydrochloric acid or nitric acid are aqueous acid).
More excellent, the concentration of described acid solution is 0.001～2M.
Preferably, described bake out temperature is 55～65 ℃.More excellent, described bake out temperature is 60 ℃.
In cigarette filter of the present invention, described TiO
2the hydrate nanometer pipe interweaves and mixes with acetate fiber, jointly forms the adsorption filtration layer of cigarette filter.And adsorption filtration layer of the present invention both can be used as whole cigarette filter, also can be used as the wherein part of cigarette filter, be positioned at front end, middle part or the rear end of cigarette filter.
TiO
2the hydrate nanometer pipe has the ability of very strong adsorb ammonia; And, overlength TiO
2the hydrate nanometer pipe firmly interweaves and mixes with acetate fiber, and not obvious and adsorbent is difficult for the defect that interweaves and mix with acetate fiber to the compositions such as ammonia of main stream smoke of cigarette degradeds to have solved existing technology.
Secondly the present invention also discloses the aforesaid roll tobacco filters for adsorbing and remove the purposes of cigarette mainstream flue gas Related Component.
In described cigarette mainstream flue gas, Related Component is ammonia.
The present invention finally also discloses a kind of cigarette, contains the aforesaid roll tobacco filters.
TiO
2the hydrate nanometer pipe be shorter in length than 1 micron the time, be difficult for mixing with acetate fiber, firmly interweave and mix with acetate fiber, its length need to be over 1 micron, optimum length is more than 5 microns; TiO
2hydrate nanometer pipe diameter is advisable in 5 to 100 nanometers, while being less than 5 nanometer, and its bad dispersibility, not easy to operate, while being greater than 100 nanometer, its specific area is little, to the adsorption capacity reduction of Related Component in main flume; TiO in the adsorption filtration layer of cigarette filter
2hydrate nanometer pipe content (weight ratio) is that 0.01% to 10% of acetate fiber is advisable, and while being less than 0.01%, its content is low, and to the adsorption capacity reduction of Related Component in main flume, while being greater than 10%, cost improves.
Beneficial effect of the present invention is: TiO
2the hydrate nanometer pipe has very strong adsorb ammonia ability, simultaneously, and overlength TiO
2nanotube can firmly interweave and mix with acetate fiber, and therefore, not obvious and adsorbent is difficult for the defect that interweaves and mix with acetate fiber to the degraded of the compositions such as ammonia of main stream smoke of cigarette to have solved prior art.
The accompanying drawing explanation
Fig. 1: TiO
2hydrate nanometer pipe scanning electron microscope (SEM) photograph
Fig. 2: TiO
2hydrate nanometer pipe scanning electron microscope (SEM) photograph
Fig. 3: the adsorption filtration layer is as whole cigarette filter
Fig. 4: the absorption filtering layer is as the part (front end) of cigarette filter
Fig. 5: the adsorption filtration layer is as the part (middle part) of cigarette filter
Fig. 6: the adsorption filtration layer is as the part (rear end) of cigarette filter
1. cigarette filter 11. adsorption filtration layer 12. acetate fiber section
The specific embodiment
Further set forth the present invention below in conjunction with embodiment.Should be understood that embodiment is only for the present invention is described, but not limit the scope of the invention.
Embodiment 1TiO
2the preparation of hydrate nanometer pipe
1. preparation method:
Method 1: by 2g business level TiO
2(P25) be dissolved in 75ml10M NaOH solution, mixture is moved into to the 100mL autoclave and puts into oil bath pan, hydro-thermal 24h under the rotating speed of the temperature ranges of 150 ℃ and 10r/min.The white precipitate that reaction obtains after finishing is washed with distilled water to neutrality, soaks subsequently 24h in acid solution, then suction filtration drip washing finally obtains TiO to neutral, 60 ℃ of oven dry
2the hydrate nanometer pipe.
Method 2: by 0.1g business level TiO
2(P25) be dissolved in 75ml8M NaOH solution, mixture is moved into to the 100mL autoclave and puts into oil bath pan, hydro-thermal 18h under the rotating speed of the temperature ranges of 200 ℃ and 5r/min.The white precipitate that reaction obtains after finishing is washed with distilled water to neutrality, soaks subsequently 20h in acid solution, then suction filtration drip washing finally obtains TiO to neutral, 55 ℃ of oven dry
2the hydrate nanometer pipe.
Method 3: by 5g business level TiO
2(P25) be dissolved in 75ml12M KOH solution, mixture is moved into to the 100mL autoclave and puts into oil bath pan, hydro-thermal 72h under the rotating speed of the temperature ranges of 100 ℃ and 20r/min.The white precipitate that reaction obtains after finishing is washed with distilled water to neutrality, soaks subsequently 18h in acid solution, then suction filtration drip washing finally obtains TiO to neutral, 65 ℃ of oven dry
2the hydrate nanometer pipe.
2. product characterizes
The TiO that preceding method is prepared
2the hydrate nanometer pipe carries out scanning electron microscope analysis, known TiO
2the hydrate nanometer length of tube is 1-25um, and diameter is the 100nm left and right, specifically sees Fig. 1-2.Accompanying drawing 1 has shown the TiO of embodiment 1 preparation
2the ESEM of hydrate nanometer pipe (SEM) photo (2000 times of multiplication factors), can find out TiO
2the hydrate nanometer pipe in tubular construction, favorable dispersibility, the about 1-25um of length; Accompanying drawing 2 has shown the TiO of embodiment 1 preparation
2the ESEM of hydrate nanometer pipe (SEM) photo (30000 times of multiplication factors).Can find out TiO
2the hydrate nanometer pipe in tubular construction, favorable dispersibility, pollution-free on tube wall, diameter is about 100nm.
The preparation of embodiment 2 cigarette filters
1. raw material
Process raw material: acetate fiber, purchased from Guizhou Zhong Yan Industrial Co., Ltd.
2. the preparation of cigarette filter
Method one:
TiO by embodiment 1 preparation
2the hydrate nanometer pipe mixes with acetate fiber, makes the adsorption filtration layer of cigarette filter.Wherein, TiO in the adsorption filtration layer
2the quality of hydrate nanometer pipe is 0.01% of the total acetate fiber quality of cigarette filter.
The adsorption filtration layer of employing previous step prepares filter stick by the industrialization forming step of filter stick, and cutting obtains cigarette filter.In the inventive method, containing TiO
2the adsorption filtration layer of hydrate nanometer pipe is full of whole cigarette filter (as shown in Figure 3).
Method two:
TiO by embodiment 1 preparation
2hydrate nanometer pipe and acetate fiber are mixed with the adsorption filtration layer of cigarette filter, wherein TiO in the adsorption filtration layer
2the quality of hydrate nanometer pipe is 1% of the total acetate fiber quality of cigarette filter.
The adsorption filtration layer of employing previous step prepares filter stick by the industrialization forming step of filter stick, and containing TiO
2as a filter tip part, (front end, as shown in Figure 4), the acetate fiber section splicing with being made by acetate fiber fully, obtain cigarette filter to the filter course of hydrate nanometer pipe.
Method three:
TiO by embodiment 1 preparation
2hydrate nanometer pipe and acetate fiber are mixed with the adsorption filtration layer of cigarette filter, wherein TiO in the adsorption filtration layer
2the quality of hydrate nanometer pipe is 5% of the total acetate fiber quality of cigarette filter.
The adsorption filtration layer of employing previous step prepares filter stick by the industrialization forming step of filter stick, and containing TiO
2as a filter tip part, (middle part, as shown in Figure 5), the acetate fiber section splicing with being made by acetate fiber fully, obtain cigarette filter to the filter course of hydrate nanometer pipe.
Method four:
TiO by embodiment 1 preparation
2hydrate nanometer pipe and acetate fiber are mixed with the adsorption filtration layer of cigarette filter, wherein TiO in the adsorption filtration layer
2the quality of hydrate nanometer pipe is 10% of the total acetate fiber quality of cigarette filter.
The adsorption filtration layer of employing previous step prepares filter stick by the industrialization forming step of filter stick, and containing TiO
2as a filter tip part, (rear end, as shown in Figure 6), the acetate fiber section splicing with being made by acetate fiber fully, obtain cigarette filter to the filter course of hydrate nanometer pipe.
The detection of embodiment 3 filter tip adsorption filtration effects
1. experimental technique
Prepare filter tip according to the method for embodiment 2, containing TiO
2the filter course of hydrate nanometer pipe is positioned at the filter stick front end, and the filter tip specification of preparation is as follows: TiO in a. adsorption filtration layer
2the quality of hydrate nanometer pipe is 1% of the total acetate fiber quality of cigarette filter; B. TiO in the adsorption filtration layer
2the quality of hydrate nanometer pipe is 5% of the total acetate fiber quality of cigarette filter; C. TiO in the adsorption filtration layer
2the quality of hydrate nanometer pipe is 10% of the total acetate fiber quality of cigarette filter.Prepare cigarette with above-mentioned filter tip, obtain the cigarette that contains the adsorption filtration layer in filter tip.
Contrast: adopt the filter tip formed by acetate fiber fully, prepare cigarette sample in contrast.
Detection method: the detection method reference of filter tip adsorption filtration effect: the mensuration of YC/T377-2010 ammonia of main stream smoke of cigarette.
2. experimental result
Cigarette containing the adsorption filtration layer in the filter tip made by preceding method sees the following form in the result of the test that reduces the ammonia of main stream smoke of cigarette burst size:
Contain the adsorption filtration effect of the cigarette of adsorption filtration layer in table 1 filter tip
Above-mentioned experimental result shows: the filter-tip cigarette had containing above-mentioned adsorption filtration layer can obviously reduce the burst size of the compositions such as ammonia of main stream smoke of cigarette.
Claims (9)
1. a cigarette filter, contain the adsorption filtration layer, it is characterized in that, described adsorption filtration layer is by acetate fiber and TiO
2the hydrate nanometer pipe forms.
2. cigarette filter as claimed in claim 1, is characterized in that, TiO in described adsorption filtration layer
2the content of hydrate nanometer pipe is no less than the 0.01wt% of the total acetate fiber content of cigarette filter.
3. cigarette filter as claimed in claim 2, is characterized in that, TiO in described adsorption filtration layer
20.01wt%～10wt% that the content of hydrate nanometer pipe is the total acetate fiber quality of cigarette filter.
4. cigarette filter as claimed in claim 1, is characterized in that, described TiO
2the length of hydrate nanometer pipe is more than or equal to 1 micron, and diameter is 5～100nm.
5. cigarette filter as claimed in claim 1, is characterized in that, described TiO
2the hydrate nanometer pipe adopts following method to prepare:
1) by TiO
2be dissolved in aqueous slkali and obtain mixture, mixture is placed under 100～200 ℃ of autoclaves, with the rotating speed of 5～20r/min, carry out hydro-thermal reaction 18～96h;
2) reaction is collected the white precipitate product after finishing, and distilled water washs to neutrality, precipitated product is soaked in acid solution to 18～24h, and after reaction finishes, suction filtration washing precipitation, to neutral, are dried precipitation, obtain TiO
2the hydrate nanometer pipe.
6. cigarette filter as claimed in claim 5, is characterized in that, in the described mixture of step 1), and TiO
2mass percent be 0.1%～10%.
7. cigarette filter as claimed in claim 1, is characterized in that, described adsorption filtration layer is full of whole described cigarette filter, or be positioned at front end, middle part or the rear end of described cigarette filter.
8. the described cigarette filter of the arbitrary claim of claim 1-7 is for adsorbing and remove the purposes of ammonia of main stream smoke of cigarette.
9. a cigarette, contain the described cigarette filter of the arbitrary claim of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102106909A CN103462219A (en) | 2013-05-30 | 2013-05-30 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102106909A CN103462219A (en) | 2013-05-30 | 2013-05-30 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103462219A true CN103462219A (en) | 2013-12-25 |
Family
ID=49787449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102106909A Pending CN103462219A (en) | 2013-05-30 | 2013-05-30 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103462219A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001097640A1 (en) * | 2000-06-19 | 2001-12-27 | Shimaya Corporation | Filter for cigarette, cigarette with filter and method for producing ceramic for cigarette filter |
| WO2004110189A2 (en) * | 2003-06-13 | 2004-12-23 | Philip Morris Products S.A. | Cigarette wrapper with catalytic filler and methods of making same |
| WO2010017989A1 (en) * | 2008-08-14 | 2010-02-18 | Rhodia Acetow Gmbh | Photodegradable plastic and its use |
| CN101692934A (en) * | 2009-10-22 | 2010-04-14 | 湖南中烟工业有限责任公司 | Additive for lowering harmful constituents in cigarette flue gas and cigarette thereof |
| CN101711603A (en) * | 2009-11-13 | 2010-05-26 | 湖南中烟工业有限责任公司 | Composite filter tip of cigarette and preparation process thereof |
| CN102178348A (en) * | 2011-04-18 | 2011-09-14 | 福州大学 | Filter tip additional material capable of reducing harmful ingredients as well as preparation method and application thereof |
| CN102946744A (en) * | 2010-05-20 | 2013-02-27 | 莱蒙造纸厂 | Paper for article to be smoked having incendiary potential-reducing properties |
-
2013
- 2013-05-30 CN CN2013102106909A patent/CN103462219A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001097640A1 (en) * | 2000-06-19 | 2001-12-27 | Shimaya Corporation | Filter for cigarette, cigarette with filter and method for producing ceramic for cigarette filter |
| WO2004110189A2 (en) * | 2003-06-13 | 2004-12-23 | Philip Morris Products S.A. | Cigarette wrapper with catalytic filler and methods of making same |
| WO2010017989A1 (en) * | 2008-08-14 | 2010-02-18 | Rhodia Acetow Gmbh | Photodegradable plastic and its use |
| CN101692934A (en) * | 2009-10-22 | 2010-04-14 | 湖南中烟工业有限责任公司 | Additive for lowering harmful constituents in cigarette flue gas and cigarette thereof |
| CN101711603A (en) * | 2009-11-13 | 2010-05-26 | 湖南中烟工业有限责任公司 | Composite filter tip of cigarette and preparation process thereof |
| CN102946744A (en) * | 2010-05-20 | 2013-02-27 | 莱蒙造纸厂 | Paper for article to be smoked having incendiary potential-reducing properties |
| CN102178348A (en) * | 2011-04-18 | 2011-09-14 | 福州大学 | Filter tip additional material capable of reducing harmful ingredients as well as preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 黄琮等: "钛酸纳米管的制备及TEM表征", 《无机材料学报》, vol. 21, no. 3, 31 May 2006 (2006-05-31) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103462221B (en) | Cigarette filter containing adsorption filtration layer and application thereof | |
| Li et al. | Preparation and characterization of high-surface-area activated carbon fibers from silkworm cocoon waste for congo red adsorption | |
| US11006664B2 (en) | Graphene adsorbing material, preparation method therefor and application thereof, and cigarette filter tip and cigarette | |
| Phan et al. | Production of fibrous activated carbons from natural cellulose (jute, coconut) fibers for water treatment applications | |
| Talukder et al. | Chitosan-functionalized sodium alginate-based electrospun nanofiber membrane for As (III) removal from aqueous solution | |
| CN107715852B (en) | Vanillin modified chitosan-SiO2Composite aerogel material and preparation method and application thereof | |
| JP5886383B2 (en) | Activated carbon with excellent adsorption performance and method for producing the same | |
| CN103693681A (en) | Method for preparing super-long titanate micro/nanotubes | |
| CN106345426A (en) | Method for preparing nanocellulose for efficiently adsorbing heavy metal ions from natural fallen leaves | |
| CN111606405A (en) | Method for degrading organic pollutants in water by activating peracetic acid through nitrogen-doped carbon material | |
| CN105597675A (en) | Graphene adsorbing material, preparation method and application thereof and cigarette filter tip | |
| CN107413295A (en) | The preparation method of the nano-fibre supported hydroxyapatite defluorination material of porous activated carbon | |
| CN105621412A (en) | Preparation method of carbon material with three-stage pores | |
| CN105621384A (en) | Synthetic method of carbon material | |
| CN109082880B (en) | Functional activated carbon fiber, preparation method and application thereof | |
| CN103611505B (en) | Preparation method, product and application of copper ion functionalized porous cellulose composite microsphere | |
| Naeini et al. | Eco-friendly inorganic-organic bionanocomposite (Copper oxide—Carboxyl methyl cellulose—Guar gum): Preparation and effective removal of dye from aqueous solution | |
| Azimi et al. | Application of cellulose-based materials as water purification filters; a state-of-the-art review | |
| CN104649361B (en) | Water purification material and preparation method thereof | |
| CN103462222B (en) | A kind of containing overlength TiO 2hydrate nanometer pipe and TiO 2the cigarette filter of nano powder | |
| CN107199015A (en) | A kind of preparation method of sepiolite base volume cigarette filter tip adsorbent | |
| CN105621383A (en) | Preparation method of macroporous carbon | |
| CN103462219A (en) | Cigarette filter containing ultralong TiO2 aquo-complex nanotube | |
| CN103462220B (en) | Cigarette filter containing ultralong TiO2 aquo-complex nanotube, TiO2 nanometer powder and activated carbon fiber | |
| CN105887228A (en) | Preparation method for producing porous diacetate cellulose tow by using ultraviolet light-aided dry spinning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131225 |