CN108950738A - A kind of preparation method of sisal hemp activated carbon fibre - Google Patents
A kind of preparation method of sisal hemp activated carbon fibre Download PDFInfo
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/16—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate
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Abstract
The present invention provides a kind of preparation methods of sisal hemp activated carbon fibre, comprising the following steps: sisal fiber is carbonized, obtains carbonization sisal fiber；Impregnation is carried out to the carbonization sisal fiber using KOH solution, obtains dipping sisal fiber；The dipping sisal fiber is activated, sisal hemp activated carbon fibre is obtained.Sisal fiber abundance, environmental-friendly selected by the present invention, low in cost；The present invention first carries out carbonization treatment to sisal fiber, can sufficiently avoid sisal fiber structural damage, then with KOH impregnating active, the sisal hemp activated carbon fibre specific surface area being prepared can be made to be up to 2289m2·g‑1, and there is distribution of pores abundant；The sisal hemp activated carbon fibre being prepared is used in supercapacitor, in 0.5Ag‑1Under specific capacitance be up to 415F/g, the energy density under 6.0M KOH aqueous electrolyte bipolar electrode system is up to 12.6Wh/Kg.
Description
Technical field
The present invention relates to the technical fields more particularly to a kind of preparation method of sisal hemp activated carbon fiber of carbon material preparation.
Background technique
Supercapacitor causes extensive concern due to its high power density and long cycle life.Super capacitor
The quality of device performance is by various influences, and wherein electrode material is the key factor of supercapacitor development.Numerous
In electrode material for super capacitor, carbon material is because having excellent electric conductivity, physical and chemical stability, large specific surface area, valence
The advantages that lattice are cheap is always the preferred material for manufacturing supercapacitor.
In numerous porous carbon materials, activated carbon fibre has the spies such as specific surface area height, the narrow, good conductivity of pore-size distribution
Point, is more and more applied in supercapacitor.But most of the precursor fibre of activated carbon fibre is prepared as pitch
Base, phenolic resin base, polyacrylonitrile-radical, polyvinyl alcohol based etc., the application of biomass cellulose base is seldom.Biological material conduct
One huge resources bank prepares biomass-based porous carbon materials using renewable resources such as biomass resource or agricultural wastes
It has become when previous research hotspot.But the carbon fiber specific surface area of biomass preparation is small in the prior art, mesoporous few, is used for
Chemical property when electrode material is generally poor.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of sisal hemp activated carbon fiber, are obtained using the preparation method
Sisal hemp activated carbon fiber have preferable chemical property.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of preparation methods of sisal hemp activated carbon fibre, comprising the following steps:
Sisal fiber is carbonized, carbonization sisal fiber is obtained；
Impregnation is carried out to the carbonization sisal fiber using KOH solution, obtains dipping sisal fiber；
The dipping sisal fiber is activated, sisal hemp activated carbon fibre is obtained.
Preferably, the temperature of the carbonization is 400~500 DEG C, and the time of carbonization is 1~2h.
Preferably, the heating rate for being warming up to the temperature of the carbonization is 3~5 DEG C/min.
Preferably, the temperature of the activation processing is 750~900 DEG C, and the time of activation processing is 1~2h.
Preferably, the heating rate of the temperature for being warming up to the activation processing is 3~4 DEG C/min.
Preferably, the mass ratio of the sisal fiber and KOH in KOH solution are 1:(1~4).
Preferably, the time of the impregnation is 8~12h.
Preferably, the preparation method of the sisal fiber, preferably includes following steps:
Sisal hemp is extracted using sodium hydrate aqueous solution, obtains sisal fiber crude product；
The sisal fiber crude product is bleached using sodium chlorite solution and acetic acid, obtains sisal fiber.
Preferably, after the activation processing further include: the product obtained after activation processing is successively washed and dried.
Preferably, the temperature of the drying is 100~120 DEG C, and the time of the drying is 6~10h.
The present invention provides a kind of preparation methods of sisal hemp activated carbon fibre, comprising the following steps: carries out sisal fiber
Carbonization obtains carbonization sisal fiber；Impregnation is carried out to the carbonization sisal fiber using KOH solution, obtains dipping sisal hemp
Fiber；The dipping sisal fiber is activated, sisal hemp activated carbon fibre is obtained.Sisal fiber selected by the present invention
Abundance, it is environmental-friendly, it is low in cost；The present invention first carries out carbonization treatment to sisal fiber, can sufficiently avoid sisal hemp fine
Structural damage is tieed up, then with KOH impregnating active, the sisal hemp activated carbon fibre specific surface area being prepared can be made to be up to
2289m2·g-1, and there is distribution of pores abundant；The sisal hemp activated carbon fibre being prepared is used in supercapacitor,
0.5A·g-1Under specific capacitance be up to 415F/g, the energy density highest under 6.0M KOH aqueous electrolyte bipolar electrode system
For 12.6Wh/Kg.
Detailed description of the invention
Fig. 1 is the scanning electron microscope (SEM) photograph for the sisal hemp activated carbon fibre that embodiment 3 is prepared；
Fig. 2 is the transmission electron microscope picture for the sisal hemp activated carbon fibre that embodiment 3 is prepared；
It in current density is 10Ag that Fig. 3, which is the sisal hemp activated carbon fibre that is prepared of embodiment 3,-1Under the conditions of cyclicity
It can figure；
Fig. 4 is the high rate performance figure for the sisal hemp activated carbon fibre that embodiment 3~6 is prepared.
Specific embodiment
The present invention provides a kind of preparation methods of sisal hemp activated carbon fibre, comprising the following steps:
Sisal fiber is carbonized, carbonization sisal fiber is obtained；
Impregnation is carried out to the carbonization sisal fiber using KOH solution, obtains dipping sisal fiber；
The dipping sisal fiber is activated, sisal hemp activated carbon fibre is obtained.
In the present invention, if without specified otherwise, all raw material components are commercial product well known to those skilled in the art.
Sisal fiber is carbonized by the present invention, obtains carbonization sisal fiber；In the present invention, the system of the sisal fiber
Preparation Method preferably includes following steps:
Sisal hemp is extracted using sodium hydrate aqueous solution, obtains sisal fiber crude product；
The sisal fiber crude product is bleached using sodium chlorite solution and acetic acid, obtains sisal fiber.
In the present invention, to sisal hemp extract before preferably the sisal hemp is pre-processed, it is described pretreatment preferably according to
Secondary is to wash, shred and dry.The present invention is to the no any special restriction of washing, using known to those skilled in the art
Washing technical solution；The present invention does not have any special requirement to the size of the sisal hemp after described shred, using this
Sisal hemp size known to the technical staff of field.
In the present invention, the temperature of the drying is preferably 30~60 DEG C, and more preferably 35~45 DEG C；The drying when
Between preferably 1~4h, more preferably 2~3h.
In the present invention, the mass concentration of the sodium hydrate aqueous solution is preferably 3wt%~6wt%, more preferably
4wt%~5wt%.In the present invention, the quality of the pretreated sisal hemp and the volume ratio of sodium hydrate aqueous solution are preferred
For (15~25) g:(450~550) mL, more preferably (18~22) g:(480~520) mL.
In the present invention, the temperature of the extraction is preferably 40~70 DEG C, and more preferably 50~60 DEG C；The extraction when
Between preferably 3~6h, more preferably 4~5h.In the present invention, the extraction preferably carries out under stirring conditions, the present invention
To the no any special restriction of stirring, carried out using stirring well known to those skilled in the art.
After the completion of extraction, the present invention preferably obtains sisal fiber crude product by way of being filtered, washed.The present invention is to described
No any special restriction is filtered, using the technical solution of filtering well known to those skilled in the art；In the present invention,
The cleaning solution of the washing is preferably deionized water；The present invention does not have any special restriction to the process of the washing, uses
The technical solution of washing well known to those skilled in the art simultaneously makes the pH value of sisal fiber crude product reach neutrality.
In the present invention, the bleaching preferably mixes sodium chlorite solution, acetic acid and sisal fiber crude product, is floated
It is white.In the present invention, the mass concentration of the sodium chlorite solution is preferably 4wt%~6wt%, and more preferably 4.5wt%~
5.5wt%；The quality of the sisal fiber crude product and the volume ratio of sodium chlorite solution be preferably (15~25) g:(450~
550) mL, more preferably (18~22) g:(480~520) mL.The present invention does not have any special restriction to the acetic acid, uses
Commercially available analytically pure acetic acid well known to those skilled in the art.
In the present invention, the mixing of the sodium chlorite solution, acetic acid and sisal fiber is preferably first by sodium chlorite solution
After sisal fiber mixing, mixed under stirring conditions with acetic acid.The main function of the acetic acid is to adjust in the present invention
The pH value of bleaching liquid, and carry out further enhancing bleaching effect.
In the present invention, the temperature of the bleaching is preferably 30~60 DEG C, and more preferably 40~50 DEG C；The bleaching when
Between preferably 5~9h, more preferably 6~8h.In the present invention, the pH value of the bleaching is preferably 4~5, more preferably 4.2~
4.8。
In the present invention, the bleaching preferably carries out under stirring conditions, and the present invention is to the no any spy of stirring
Different restriction is carried out using stirring well known to those skilled in the art.
In the present invention, the effect of the bleaching is that the color of removing sisal fiber obtains pure white fiber.
After the completion of bleaching, the present invention is preferably filtered the sisal fiber after bleaching, by obtained solid material successively into
Row washing and drying.The present invention is to the no any special restriction of filtering, using filtering well known to those skilled in the art
Progress；The present invention is to the no any special restriction of washing, using washing process well known to those skilled in the art
It carries out and makes sisal fiber washing for neutrality.In the present invention, the temperature of the drying is preferably 50~80 DEG C, more preferably
It is 60~70 DEG C, most preferably 62~68 DEG C；The time of the drying is preferably 8~12h, more preferably 9~11h.
In the present invention, the temperature of the carbonization is preferably 400~500 DEG C, and more preferably 420~480 DEG C, most preferably
440~460 DEG C；The time of the carbonization is preferably 1~2h, more preferably 1.2~1.8h, most preferably 1.4~1.6h.At this
In invention, the heating rate of the carbonization is preferably 3~5 DEG C/min, more preferably 3.5~4.5 DEG C/min.In the present invention,
The carbonization time does not include the time of temperature-rise period.
In the present invention, the carbonization preferably carries out in an inert atmosphere, and the present invention is not any to the inert atmosphere
Special requirement, using inert atmosphere well known to those skilled in the art.
After obtaining carbonization sisal fiber, the present invention carries out impregnation to the carbonization sisal fiber using KOH solution, obtains
To dipping sisal fiber.The present invention does not have any special restriction to the concentration of the KOH solution, using those skilled in the art
Well known concentration.
In the present invention, the mass ratio of the sisal fiber and KOH in KOH solution is preferably 1:(1~4), more preferably
1:(2~3).In the present invention, the time of the impregnation is preferably 8~12h, more preferably 9~11h.
In the present invention, the purpose of the impregnation is to make it subsequent to make carbon fiber and KOH react more abundant
Activation process in, the C atomic energy of carbon fiber is more reacted with KOH, be conducive to pore-creating and increase specific surface area.
After the completion of impregnation, the solution during impregnation is preferably evaporated by the present invention, then impregnates sword to gained
Flaxen fiber is dried.The present invention does not have any special restriction to the process being evaporated, ripe using those skilled in the art
The process known.In the present invention, the temperature of the drying is preferably 50~80 DEG C, and more preferably 60~70 DEG C；It is described dry
The dry time is preferably 8~12h, more preferably 9~11h.
After obtaining dipping sisal fiber, the dipping sisal fiber is activated by the present invention, obtains sisal hemp activity
Carbon fibe.In the present invention, the temperature of the activation processing is preferably 750~900 DEG C, more preferably 800~880 DEG C, optimal
It is selected as 820~860 DEG C；The time of the activation processing is preferably 1~2h, more preferably 1.2~1.8h；The activation processing
Heating rate is preferably 3~4 DEG C/min, more preferably 3.2~3.8 DEG C/min.In the present invention, the activation time does not include
Time in temperature-rise period.
After the completion of activation processing, the present invention further preferably includes that the product obtained after activation is successively washed and dried；
In the present invention, the washing is preferably successively washed with hydrochloric acid solution and deionized water；In the present invention, the hydrochloric acid solution
Concentration be preferably 1~2M.The present invention does not have any special restriction to the detailed process of the washing, using art technology
The technical solution washed known to personnel.It in the present invention, is to remove sisal hemp activated carbon fibre with the purpose of salt acid elution
In inorganic impurity, the purpose being washed with water be neutralize sisal hemp activated carbon fibre acidity.
In the present invention, the temperature of the drying is preferably 100~120 DEG C, and more preferably 105~115 DEG C；The drying
Time be preferably 6~10h, more preferably 7~9h.
It is described in detail below with reference to preparation method of the embodiment to sisal hemp activated carbon fibre provided by the invention, but
It is that they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Sisal hemp is washed with water, is shredded, and dry 2h under the conditions of 40 DEG C.Then 500mL matter is added in dry sisal hemp
It measures in the sodium hydrate aqueous solution that concentration is 4%, stirs 4h under conditions of 50 DEG C.Filtering, is washed with deionized to neutrality,
Obtain sisal fiber crude product.
The sodium chlorite solution that sisal fiber crude product described in 20g and 500mL mass concentration are 5% mix, 40 DEG C with
Under conditions of stirring, the pH of bleaching liquid is adjusted to 4 with acetic acid, rinses 6h.The sisal fiber of bleaching is filtered and is used a large amount of
Deionized water washing is at neutrality, and dry 10h, obtains sisal fiber in 60 DEG C of baking ovens.
Under an inert atmosphere, the sisal fiber is warming up to 400 DEG C with the rate of 3 DEG C/min, be carbonized 1h, is carbonized
Sisal fiber.
It then is 1:1 by KOH and sisal fiber mass ratio, by the carbonization sisal fiber KOH solution impregnation
Moisture in solution is evaporated by 10h, and the dry 10h in 60 DEG C of baking ovens obtains dipping sisal fiber.
The dipping sisal fiber is risen into 750 DEG C of activation 1h with the rate of 3 DEG C/min.Then prepared material is used
1M HCl solution is washed to remove inorganic impurity, and is further washed to neutrality, finally by sample at 110 DEG C with deionized water
Dry 8h.
Embodiment 2
Sisal hemp is washed with water, is shredded, and dry 3h under the conditions of 50 DEG C.Then 500mL matter is added in dry sisal hemp
It measures in the sodium hydrate aqueous solution that concentration is 5%, stirs 5h under conditions of 60 DEG C.Filtering, is washed with deionized to neutrality,
Obtain sisal fiber crude product.
The sodium chlorite solution that sisal fiber crude product described in 20g and 500mL mass concentration are 6% mix, 50 DEG C with
Under conditions of stirring, the pH of bleaching liquid is adjusted to 5 with acetic acid, rinses 7h.The sisal fiber of bleaching is filtered and is used a large amount of
Deionized water washing is at neutrality, and dry 11h, obtains sisal fiber in 70 DEG C of baking ovens.
Under an inert atmosphere, the sisal fiber is warming up to 450 DEG C with the rate of 4 DEG C/min, be carbonized 2h, is carbonized
Sisal fiber.
It then is 2:1 by KOH and sisal fiber mass ratio, by the carbonization sisal fiber KOH solution impregnation
Moisture in solution is evaporated by 11h, and the dry 11h in 70 DEG C of baking ovens obtains dipping sisal fiber.
The dipping sisal fiber is risen into 750 DEG C of activation 2h with the rate of 4 DEG C/min.Then prepared material is used
2M HCl solution is washed to remove inorganic impurity, and is further washed to neutrality, finally by sample at 120 DEG C with deionized water
Dry 9h.
Embodiment 3
Sisal hemp is washed with water, is shredded, and dry 4h under the conditions of 60 DEG C.Then 500mL matter is added in dry sisal hemp
It measures in the sodium hydrate aqueous solution that concentration is 6%, stirs 6h under conditions of 70 DEG C.Filtering, is washed with deionized to neutrality,
Obtain sisal fiber crude product.
The sodium chlorite solution that sisal fiber crude product described in 20g and 500mL mass concentration are 5% mix, 60 DEG C with
Under conditions of stirring, the pH of bleaching liquid is adjusted to 5 with acetic acid, rinses 8h.The sisal fiber of bleaching is filtered and is used a large amount of
Deionized water washing is at neutrality, and dry 12h, obtains sisal fiber in 80 DEG C of baking ovens.
Under an inert atmosphere, the sisal fiber is risen to 500 DEG C with the rate of 3 DEG C/min, be carbonized 1h, obtains carbonization sword
Flaxen fiber.
It then is 3:1 by KOH and sisal fiber mass ratio, by the carbonization sisal fiber KOH solution impregnation
Moisture in solution is evaporated by 12h, and the dry 12h in 80 DEG C of baking ovens obtains dipping sisal fiber.
The dipping sisal fiber is risen into 750 DEG C of activation 1h with the rate of 3 DEG C/min.Then prepared material is used
1M HCl solution is washed to remove inorganic impurity, and is further washed to neutrality, finally by sample at 120 DEG C with deionized water
Dry 10h；
Fig. 1 is the scanning electron microscope (SEM) photograph for the sisal hemp activated carbon fibre that the preparation method is prepared；Fig. 2 is the preparation side
The transmission electron microscope picture for the sisal hemp activated carbon fibre that method is prepared；By Fig. 1 and Fig. 2 it is found that the sisal hemp activated carbon fiber has
Pore structure abundant.
It in current density is 10Ag that Fig. 3, which is the sisal hemp activated carbon fibre that is prepared of the preparation method,-1Under the conditions of
Cycle performance figure；As seen from the figure, when the sisal hemp active carbon is as electrode material, its specific capacity after charge and discharge cycles 1000 are enclosed
Conservation rate is 93%, illustrates it with good electrochemistry cycle performance.
Embodiment 4
Sisal hemp is washed with water, is shredded, and dry 2h under the conditions of 40 DEG C.Then 500mL matter is added in dry sisal hemp
It measures in the sodium hydrate aqueous solution that concentration is 4%, stirs 4h under conditions of 50 DEG C.Filtering, is washed with deionized to neutrality,
Obtain sisal fiber crude product.
The sodium chlorite solution that sisal fiber crude product described in 20g and 500mL mass concentration are 6% mix, 40 DEG C with
Under conditions of stirring, pH is adjusted to 4 with acetic acid, rinses 6h.The sisal fiber of bleaching is filtered and uses a large amount of deionized water
Neutrality is washed into, dry 10h, obtains sisal fiber in 60 DEG C of baking ovens.
Under an inert atmosphere, the sisal fiber is risen to 500 DEG C with the rate of 5 DEG C/min, be carbonized 2h, obtains carbonization sword
Flaxen fiber.
It then is 4:1 by KOH and sisal fiber mass ratio, by the carbonization sisal fiber KOH solution impregnation
Moisture in solution is evaporated by 12h, and the dry 12h in 80 DEG C of baking ovens obtains dipping sisal fiber.
The dipping sisal fiber is risen into 800 DEG C of activation 1h with the rate of 3 DEG C/min.Then prepared material is used
1M HCl solution is washed to remove inorganic impurity, and is further washed to neutrality, finally by sample at 120 DEG C with deionized water
Dry 8h.
Embodiment 5
Sisal hemp is washed with water, is shredded, and dry 3h under the conditions of 50 DEG C.Then 500mL matter is added in dry sisal hemp
It measures in the sodium hydrate aqueous solution that concentration is 5%, stirs 5h under conditions of 60 DEG C.Filtering, is washed with deionized to neutrality,
Obtain sisal fiber crude product.
The sodium chlorite solution that sisal fiber crude product described in 20g and 500mL mass concentration are 5% mix, 60 DEG C with
Under conditions of stirring, the pH of bleaching liquid is adjusted to 5 with acetic acid, rinses 7h.The sisal fiber of bleaching is filtered and is used a large amount of
Deionized water washing is at neutrality, and dry 11h, obtains sisal fiber in 70 DEG C of baking ovens.
Under an inert atmosphere, the sisal fiber is risen to 500 DEG C with the rate of 3 DEG C/min, be carbonized 1h, obtains carbonization sword
Flaxen fiber.
It then is 3:1 by KOH and sisal fiber mass ratio, by the carbonization sisal fiber KOH solution impregnation
Moisture in solution is evaporated by 12h, and the dry 12h in 80 DEG C of baking ovens obtains dipping sisal fiber.
The dipping sisal fiber is risen into 850 DEG C of activation 1h with the rate of 3 DEG C/min.Then prepared material is used
1M HCl solution is washed to remove inorganic impurity, and is further washed to neutrality, finally by sample at 120 DEG C with deionized water
Dry 8h.
Embodiment 6
Sisal hemp is washed with water, is shredded, and dry 4h under the conditions of 60 DEG C.Then 500mL matter is added in dry sisal hemp
It measures in the sodium hydrate aqueous solution that concentration is 6%, stirs 6h under conditions of 70 DEG C.Filtering, is washed with deionized to neutrality,
Obtain sisal fiber crude product.
The sodium chlorite solution that sisal fiber crude product described in 20g and 500mL mass concentration are 6% mix, 60 DEG C with
Under conditions of stirring, the pH of bleaching liquid is adjusted to 5 with acetic acid, rinses 8h.The sisal fiber of bleaching is filtered and is used a large amount of
Deionized water washing is at neutrality, and dry 12h, obtains sisal fiber in 80 DEG C of baking ovens.
Under an inert atmosphere, the sisal fiber is risen to 500 DEG C with the rate of 4 DEG C/min, be carbonized 1h, obtains carbonization sword
Flaxen fiber.
It then is 3:1 by KOH and sisal fiber mass ratio, by the carbonization sisal fiber KOH solution impregnation
Moisture in solution is evaporated by 12h, and the dry 12h in 80 DEG C of baking ovens obtains dipping sisal fiber.
The dipping sisal fiber is risen into 900 DEG C of activation 1h with the rate of 3 DEG C/min.Then prepared material is used
2M HCl solution is washed to remove inorganic impurity, and is further washed to neutrality, finally by sample at 120 DEG C with deionized water
Dry 8h.
Embodiment 7
Electrode slice is respectively prepared in the sisal hemp activated carbon fibre that embodiment 3~6 is prepared, then carry out tabletting, claim piece,
Assemble three electrodes.Reference electrode is mercuric oxide electrode, is platinum electrode to electrode, and electrolyte is 6mL KOH solution, will be assembled
Examining system is tested with blue electric battery test system.
Fig. 4 is the high rate performance figure for the sisal hemp activated carbon fibre that embodiment 3~6 is prepared；As seen from the figure, larger
Specific capacity still with higher under current density shows that the sisal hemp activated carbon fiber has preferable high rate performance.
Embodiment 8
Using specific surface tester, the specific surface area for the sisal hemp activated carbon fibre that testing example 3~6 is prepared is surveyed
Test result is as shown in table 1:
The specific surface area for the sisal hemp activated carbon fibre that 1 embodiment 3~6 of table is prepared
As shown in Table 1, the specific surface area for the sisal hemp activated carbon fibre that preparation method of the present invention obtains reaches as high as
2289m2/g。
As seen from the above embodiment, the specific surface area for the sisal hemp activated carbon fibre being prepared using the method for the invention
Up to 2289m2·g-1And distribution of pores abundant；The sisal hemp activated carbon fibre being prepared is used for supercapacitor
In, in 0.5Ag-1Under specific capacitance be up to 415F/g, the energy under 6.0M KOH aqueous electrolyte bipolar electrode system is close
Degree is up to 12.6Wh/Kg.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of sisal hemp activated carbon fibre, comprising the following steps:
Sisal fiber is carbonized, carbonization sisal fiber is obtained；
Impregnation is carried out to the carbonization sisal fiber using KOH solution, obtains dipping sisal fiber；
The dipping sisal fiber is activated, sisal hemp activated carbon fibre is obtained.
2. preparation method as described in claim 1, which is characterized in that the temperature of the carbonization is 400~500 DEG C, carbonization
Time is 1~2h.
3. preparation method as claimed in claim 2, which is characterized in that the heating rate for being warming up to the temperature of the carbonization is 3
~5 DEG C/min.
4. preparation method as described in claim 1, which is characterized in that the temperature of the activation processing is 750~900 DEG C, living
The time for changing processing is 1~2h.
5. preparation method as claimed in claim 4, which is characterized in that the heating of the temperature for being warming up to the activation processing
Rate is 3~4 DEG C/min.
6. preparation method as described in claim 1, which is characterized in that the mass ratio of KOH in the sisal fiber and KOH solution
For 1:(1~4).
7. preparation method as claimed in claim 6, which is characterized in that the time of the impregnation is 8~12h.
8. preparation method as described in claim 1, which is characterized in that the preparation method of the sisal fiber, including following step
It is rapid:
Sisal hemp is extracted using sodium hydrate aqueous solution, obtains sisal fiber crude product；
The sisal fiber crude product is bleached using sodium chlorite solution and acetic acid, obtains sisal fiber.
9. preparation method as described in claim 1, which is characterized in that after the activation processing further include: after activation processing
Obtained product is successively washed and is dried.
10. preparation method as claimed in claim 9, which is characterized in that the temperature of the drying is 100~120 DEG C, described dry
The dry time is 6~10h.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172751A (en) * | 2019-05-18 | 2019-08-27 | 孔令孝 | A kind of carbon fibre and its carbonization method |
| CN111589226A (en) * | 2020-05-14 | 2020-08-28 | 浙江理工大学 | Active carbon fabric filter core |
| CN113976078A (en) * | 2021-09-30 | 2022-01-28 | 华南理工大学 | Sisal fiber-based biomass activated carbon and preparation method and application thereof |
| CN117050716A (en) * | 2023-09-26 | 2023-11-14 | 上海东睿化学有限公司 | Copolyamide hot melt adhesive and preparation method thereof |
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| CN113976078A (en) * | 2021-09-30 | 2022-01-28 | 华南理工大学 | Sisal fiber-based biomass activated carbon and preparation method and application thereof |
| CN117050716A (en) * | 2023-09-26 | 2023-11-14 | 上海东睿化学有限公司 | Copolyamide hot melt adhesive and preparation method thereof |
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