CN1204302C - High density active carbon fiber preparing method - Google Patents
High density active carbon fiber preparing method Download PDFInfo
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- CN1204302C CN1204302C CN 03137026 CN03137026A CN1204302C CN 1204302 C CN1204302 C CN 1204302C CN 03137026 CN03137026 CN 03137026 CN 03137026 A CN03137026 A CN 03137026A CN 1204302 C CN1204302 C CN 1204302C
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- carbon fiber
- activated carbon
- high density
- active carbon
- fiber
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Abstract
The present invention relates to a method for preparing an activated carbon fiber with high density. An adhesive agent is added in an activated carbon fiber according to the weight proportion of 0.08:1 to 0.6:1, the mortar type mixture is prepared and formed, and thus, the blocky activated carbon fiber is prepared. The formed activated carbon fiber is heated to 180 to 220DEG C, dried, solidified, and cooled to the room temperature, and thus, the activated carbon fiber with high density is prepared. The present invention has the advantages of simple operating technology, low cost and no pollution.
Description
Technical field:
The invention belongs to a kind of high performance active carbon fiber preparation method, relate in particular to a kind of high density active charcoal fiber preparation method.
Background technology:
Therefore activated carbon fiber has advantages such as adsorption capacity is big, adsorption desorption speed is fast because specific area is high and microcellular structure is abundant.Activated carbon fiber has many important use in micromolecular absorption and separation field, as the absorption and the recovery of organic solvent in the chemical industry, the absorption of the trace harmful gases in the atmospheric environment and purification, the absorption of underwater micro-organic matter and purification etc.In addition, also useful as catalysts or catalyst carrier and natural gas energy storage material and electrode material of activated carbon fiber.Yet, lower (the about 0.1g/cm of the density of activated carbon fiber
3), in use exist the defective of the low and water resistance difference of packed density etc., thereby limited the many Application for Field of activated carbon fiber.Therefore, how improving the packed density of activated carbon fiber and water resistance is to solve one of this material key technologies for application.
Improving one of activated carbon fiber density most effectual way is to adopt resin binder to mix with active carbon, behind the certain pressure compacted under, handles through carbonization-activation and can obtain the high density active charcoal.Announced a kind of method for preparing hard block active carbon fibre as Chinese patent (application number 00104485), it is characterized in that: (1) with liquid organic polymer or high polymeric solution with crosslinking agent is by weight: organic polymer: crosslinking agent=3-20: 1 composition mixes, and obtains the high polymeric solution mixture; (2) activated carbon fiber or the activated carbon fiber powder with the 0.5-5 millimeters long is by weight: activated carbon fiber or activated carbon fiber powder: high polymeric solution mixture=1-10: 1 ratio joins in the high polymeric solution mixture, mix, obtain mixture; (3) mixture is put into mould, be heated to 100-240 ℃, solidified 20-240 minute, obtain block; (4) chemical activating agent is made into the aqueous solution that concentration is 10-70%, made block was soaked in activator solution 20-120 minute, take out block, its weight of oven dry back weighing, making activator and block weight ratio is activator: block=0.5-10: 1; (5) block that will contain activator places retort, heating rate by 1-20 ℃/minute in the air is warmed up to 200-300 ℃, gave oxidation processes 5-240 minute, the heating rate with 2-20 ℃/minute is warmed up to 400-1000 ℃ of processing 10-240 minute under inert atmosphere then.Chinese patent (application number 00104486) has also been announced a kind of preparation method of hard block active carbon fibre, it is characterized in that: (1) with the solution of liquid organic polymer or solid superpolymer with crosslinking agent is by weight: organic polymer: crosslinking agent=3-20: 1 composition mixes, and obtains the high polymeric solution mixture; (2) activated carbon fiber or the activated carbon fiber powder with the 0.5-5 millimeters long is by weight: activated carbon fiber or activated carbon fiber powder: high polymeric solution mixture=1-10: 1 ratio joins in the high polymeric solution mixture, mix, obtain mixture; (3) mixture is put into mould, be heated to 100-240 ℃, solidified 20-240 minute, obtain block; (4) block is placed retort, heating rate by 1-30 ℃/minute in air is warmed up to 200-300 ℃, pre-oxidation 5-240 minute, feeds inert gas then and under inert gas shielding, be warmed up to 400-1000 ℃ by 2-20 ℃/minute heating rate, carried out charing 0-240 minute; (5) after charing is handled, feed activation gas and activate 1-120 minute, obtain hard block active carbon fibre after reducing to room temperature.In these two kinds of preparation methods, the former need add chemical activating agent, and the latter needs re-activation, and all there is the too loaded down with trivial details defective of preparation technology in two kinds of methods.
Summary of the invention:
The purpose of this invention is to provide the simple high density active charcoal of a kind of preparation method fiber production method.
The present invention realizes by following method:
1, activated carbon fiber is cut into the short section that length is the 0.5-5 millimeters long;
2, being 0.08～0.6: 1 ratio by weight, is that the adhesive of 40-60% adds in the activated carbon fiber with containing thing admittedly, in the ground and mixed process, adds the humidity that mixture is regulated in entry, makes clay shape mixture;
3, clay shape mixture directly is encased in the mould, at 200～400kg/cm
2Forming under the pressure, make block active carbon fibre;
4, the activated carbon fiber after the moulding is put in the muffle furnace, be heated to 180～220 ℃ with 2-20 ℃/minute heating rate and carry out drying and cured, and under this temperature, keep making in 0.5～2 hour and react completely, drop to room temperature then and obtain high density active charcoal fiber.
Aforesaid activated carbon fiber is phenolic resin based activated carbon fiber, viscose-based active carbon fiber, polyacrylonitrile radical active carbon fiber or asphalt based active carbon fiber.
Aforesaid adhesive is a kind of water-soluble modified amylum adhesive.
As above mould is a spherical crown shape mould, cylindrical die or rectangular die etc.
Feature of the present invention is that the water-soluble modified amylan of the environmentally safe of a kind of cheapness of employing is an adhesive, this product has excellent mechanical intensity and water resistance, have the absorption property close with former activated carbon fiber, have higher density, density improves 3～8 times than former activated carbon fiber.
Another feature of the present invention is not need product is carried out secondary charing and activation processing in preparation process, thus effectively suppressed among the present preparation method since secondary charing and activation processing bring energy consumption and to the pollution problem of environment.
In preparation process of the present invention, heat treatment process does not need the protection of inert atmosphere, and treatment temperature is low, thereby has simplified the preparation manipulation technology of high density active charcoal fiber.
Therefore, the present invention has reduced the preparation cost of high density active charcoal fiber, has improved the output of high density active charcoal fiber.Because this technology has advantages such as operating procedure is simple, with low cost and pollution-free, thereby has good social benefit and economic benefit.
The shape of aforesaid high density active charcoal fiber can be the block of different shape, and its density is 0.4～0.8g/cm
3
The specific embodiment:
Embodiment 1, title 1 gram modified starch adhesive and 10 gram length are the asphalt based active carbon fiber of 0.5-5mm, behind 2 ml waters dilution adhesive, join in the activated carbon fiber powder, after in mortar, fully mixing, claim 5 gram mixtures again, putting into diameter and be 29 millimeters spherical crown shape mould, is 300kg/cm at pressure
-2The condition compacted under, article shaped is put into muffle furnace and is heated to 180 ℃ with 5 ℃/minute heating rate, is incubated after 2 hours, it is fast to obtain the block high density active charcoal of spherical tank shape fiber.The density of this sample is 0.6g/cm
3, at ambient temperature, the percetage by weight of benzene absorption is 26% (40 hours), the percetage by weight of corresponding activated carbon fiber felt benzene absorption is 25%.
Embodiment 2, title 5 gram modified starch adhesives and 10 gram polyacrylonitrile radical active carbon fiber weak points are cut thing (length 0.5-1 millimeter) powder, directly adhesive is joined in the activated carbon fiber powder, after the mortar grinding fully mixes, putting into length is 10cm, width is in the rectangular die of 5cm, at 200kg/cm
2Forming under the pressure.Again this article shaped is put into muffle furnace and be heated to 200 ℃, be incubated after 1 hour, get final product to such an extent that thickness is about the thick shape high density active charcoal fiber of 0.5cm after the taking-up with 10 ℃/minute heating rate.The density of this sample is 0.5g/cm
3, at ambient temperature, the percetage by weight of the benzene of sample absorption is 30% (40 hours), the percetage by weight of the benzene absorption of corresponding activated carbon fiber is 35%.
Embodiment 3, title 2 gram modified starch adhesives and 10 gram length are the phenolic resin based activated carbon fiber end of 1-2mm, behind 1 ml water dilution adhesive, join in the activated carbon fiber powder, after fully mixing with mortar, claim 2 gram mixtures again, putting into diameter and be 13 millimeters mould, is 400kg/cm-at pressure
2The condition compacted under, article shaped is put into muffle furnace and is heated to 220 ℃, is incubated after 0.5 hour, can obtain cylindric high density active charcoal fiber.The density of this sample is 0.6g/cm
3, at ambient temperature, the percetage by weight of benzene absorption is 28% (40 hours), the percetage by weight of the benzene absorption of corresponding activated carbon fiber is 25%.
Embodiment 4, title 2 gram modified starch adhesives and 6 gram length are the viscose-based active carbon fiber end of 2-4mm, adhesive is directly joined in the activated carbon fiber powder, after abundant ground and mixed is even, again mixture is put in the mould that diameter is 20mm, behind the forming under the pressure of 250kg/cm-2, be put in the muffle furnace, be heated to 180 ℃ with 15 ℃/minute heating rates, be incubated after 1 hour, can obtain diameter is the column high density active charcoal fiber of 20 millimeter.The density of this sample is 0.6g/cm
3, under the room temperature condition, the percetage by weight of benzene absorption is 35% (40 hours), the percetage by weight of the benzene absorption of corresponding activated carbon fiber is 40%.
Embodiment 5, title 2 gram modified starch adhesives and 8 gram viscose-based active carbon fiber weak points are cut thing (length 2-4 millimeter), behind 1 ml water dilution adhesive, in mortar with the two abundant ground and mixed evenly after, claim mixture 1 gram again, putting into diameter and be 13 millimeters mould, is 400kg/cm-at pressure
2The condition compacted under, make diameter and be 13 millimeters cylindric active carbon, put into muffle furnace then and be heated to 200 ℃, be incubated after 1 hour, can obtain cylindric high density active charcoal fiber.The density of this sample is 0.8g/cm
3, at ambient temperature, the percetage by weight of benzene absorption is 38% (40 hours), the percetage by weight of the benzene absorption of corresponding activated carbon fiber is 40%.
Claims (2)
1. a high density active charcoal fiber preparation method is characterized in that comprising the steps:
(1), activated carbon fiber is cut into the short section that length is the 0.5-5 millimeters long;
(2), by weight being 0.08～0.6: 1 ratio, is that the water-soluble modified amylum adhesive of 40-60% adds in the activated carbon fiber with containing thing admittedly, in the ground and mixed process, adds the humidity that mixture is regulated in entry, makes clay shape mixture;
(3), clay shape mixture directly is encased in the mould, at 200～400kg/cm
2Forming under the pressure, make block active carbon fibre;
(4), the activated carbon fiber after the moulding is put in the muffle furnace, be heated to 180～220 ℃ with 2-20 ℃/minute heating rate and carry out drying and cured, and under this temperature, keep making in 0.5～2 hour and react completely, drop to room temperature then and obtain high density active charcoal fiber.
2. a kind of high density active charcoal fiber preparation method as claimed in claim 1 is characterized in that described activated carbon fiber is phenolic resin based activated carbon fiber, viscose-based active carbon fiber, polyacrylonitrile radical active carbon fiber or asphalt based active carbon fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03137026 CN1204302C (en) | 2003-05-29 | 2003-05-29 | High density active carbon fiber preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03137026 CN1204302C (en) | 2003-05-29 | 2003-05-29 | High density active carbon fiber preparing method |
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| CN1455036A CN1455036A (en) | 2003-11-12 |
| CN1204302C true CN1204302C (en) | 2005-06-01 |
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| CN 03137026 Expired - Fee Related CN1204302C (en) | 2003-05-29 | 2003-05-29 | High density active carbon fiber preparing method |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347357C (en) * | 2006-01-26 | 2007-11-07 | 南京大学 | Method for preparing nanometer carbon fiber with high specific surface area |
| CN101301629B (en) * | 2008-06-25 | 2010-06-02 | 华东理工大学 | Formed nano-carbon fibre carrier and preparation thereof |
| CN104878478A (en) * | 2015-06-08 | 2015-09-02 | 江苏同康特种活性炭纤维面料有限公司 | Activating method of high-strength viscose-based active carbon fiber fabric |
| CN104928803A (en) * | 2015-06-08 | 2015-09-23 | 江苏同康特种活性炭纤维面料有限公司 | Impregnation method of high-strength viscose-based activated carbon fiber fabric |
| CN104878479A (en) * | 2015-06-08 | 2015-09-02 | 江苏同康特种活性炭纤维面料有限公司 | Activating method of long-service-life high-strength viscose-based active carbon fiber fabric |
| CN104947361A (en) * | 2015-06-08 | 2015-09-30 | 江苏同康特种活性炭纤维面料有限公司 | Carbonization method for viscose-based carbonized fireproofing fabric with excellent flame resistance |
| CN105002691A (en) * | 2015-06-08 | 2015-10-28 | 江苏同康特种活性炭纤维面料有限公司 | High-strength rayon-based activated carbon fiber fabric |
| CN113083261B (en) * | 2021-05-24 | 2023-02-07 | 南昌师范学院 | Modification method of activated carbon fiber material |
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