CN102390826A - Carbon aerogel surface modification method - Google Patents
Carbon aerogel surface modification method Download PDFInfo
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- CN102390826A CN102390826A CN2011101962999A CN201110196299A CN102390826A CN 102390826 A CN102390826 A CN 102390826A CN 2011101962999 A CN2011101962999 A CN 2011101962999A CN 201110196299 A CN201110196299 A CN 201110196299A CN 102390826 A CN102390826 A CN 102390826A
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- charcoal
- aero gel
- carbon aerogel
- modification
- aero
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Abstract
The invention discloses a carbon aerogel surface modification method. The method relates to a step of performing microwave irradiation modification treatment to carbon aerogel by using an ammonia water modifier. Carbon aerogel and ammonia water are used to perform ultrasonic mixing, the mixture is reacted through microwave irradiation, the operations such as filtering, washing and drying are performed to generate modified carbon aerogel. The modified carbon aerogel prepared by the method has good hydrophilicity and conductivity and can be better applied to the fields of energy storage materials and elements.
Description
Technical field
The present invention relates to a kind of charcoal-aero gel surface modifying method, particularly under microwave action, charcoal-aero gel is carried out surface modification treatment, do not destroying under the prerequisite of itself physical structure, improve the wetting ability and the electroconductibility of charcoal-aero gel simultaneously with ammoniacal liquor.
Background technology
Charcoal-aero gel is a kind of novel porous raw material of wood-charcoal material that is formed by connecting nanocarbon particle, advantage such as charcoal-aero gel not only has the porosity height, the aperture is little and specific surface area is big, and have certain electroconductibility.Charcoal-aero gel is that organic aerogel forms through high temperature carbonization in inert atmosphere, and its oxygen level is low, the bad dispersibility in the aqueous solution; The charcoal-aero gel degree of graphitization of non-modified is low, and conductivity value is low, has limited its application in energy storage material and devices field.
Different modification processing methods can be realized different application requiring.But because strong oxidizers such as nitric acid, sulfuric acid are often adopted in modification, improving its hydrophilic while, tending to cause the loss of specific conductivity, thereby restrict its application in energy storage material and devices field.
Summary of the invention
The present invention is directed to the problems referred to above, according to ammoniacal liquor charcoal-aero gel is carried out the modification processing and can improve the quantity of charcoal-aero gel surface oxygen functional group, thereby improve its dispersiveness in the aqueous solution; The polarity ammonia soln has good response to microwave; It is moderate that intensity is handled in oxidation modification; Charcoal-aero gel surface crystallite defective increases, and its degree of graphitization increases, the know-why that electroconductibility improves; A kind of charcoal-aero gel surface modifying method is provided, and the modification charcoal-aero gel for preparing through this method can have good hydrophilicity and electroconductibility simultaneously concurrently.
A kind of charcoal-aero gel surface modifying method of the present invention comprises following following steps:
(1) according to charcoal-aero gel: NH
3H
2The O mass ratio is 1: 1～1: 9 a ratio, is that the ammoniacal liquor of 1～5mol/L joins and carries out the ultrasonic 10min of mixing～6h in the container with charcoal-aero gel and concentration, obtains uniform mixture;
(2) place the microwave oven of certain power to carry out irradiation reaction the uniform mixture in the step (1), naturally cool to room temperature then, make black suspension.Wherein the rated frequency of microwave oven is 2450 ± 10MHz, and output rating is 100W～3000KW, and microwave irradiation time is 5～20s.
(3) black suspension in the step (2) is separated the charcoal-aero gel that obtains containing liquid, contain charcoal-aero gel termination when filtrating pH value is constant of liquid again with washed with de-ionized water, the charcoal-aero gel after will cleaning then is dry, promptly obtains the charcoal-aero gel of modification.Wherein the charcoal-aero gel after the modification is mainly used in energy storage material and devices field.
Advantage of the present invention:
(1) ammoniacal liquor is as properties-correcting agent, and it is moderate that intensity is handled in the charcoal-aero gel oxidation modification, can not damage its structure;
(2) microwave modification shortens the reaction times greatly, and is energy-efficient;
(3) wetting ability and the electroconductibility of charcoal-aero gel have been improved simultaneously.
Description of drawings
Fig. 1 is the XRD figure of the modification carbon aerogel material that makes by embodiment 2 technologies.
Fig. 2 is the TEM figure of the modification carbon aerogel material that makes by embodiment 2 technologies.
Fig. 3 is the FTIR figure of the modification carbon aerogel material that makes by embodiment 2 technologies.
Embodiment
Following instance will further specify the present invention.
Embodiment 1
Take by weighing charcoal-aero gel 3.5g, measure the NH of concentration 2mol/L
3H
2O solution 50mL joins charcoal-aero gel and ammonia soln and carries out supersound process 30min in the container, and it is mixed; The gained mixture is placed microwave oven, and irradiation 5s under 750W power naturally cools to room temperature then, gets black suspension; With 5
#Sand core funnel carries out repeatedly suction filtration, cleaning to this black suspension, and is constant until pH value of filtrate; With the oven dry of solid isolate, promptly get the charcoal-aero gel of modification then.
Embodiment 2
Take by weighing charcoal-aero gel 3.5g, measure the NH of concentration 5mol/L
3H
2O solution 20mL joins charcoal-aero gel and ammonia soln and carries out supersound process 30min in the container, and it is mixed; The gained mixture is placed microwave oven, and irradiation 10s under 750W power naturally cools to room temperature then, gets black suspension; With 5
#Sand core funnel carries out repeatedly suction filtration, cleaning to this black suspension, and is constant until pH value of filtrate; With the oven dry of solid isolate, promptly get the charcoal-aero gel of modification then.
Embodiment 3
Take by weighing charcoal-aero gel 3.5g, measure the NH of concentration 5mol/L
3H
2O solution 100mL joins charcoal-aero gel and ammonia soln and carries out supersound process 30min in the container, and it is mixed; The gained mixture is placed microwave oven, and irradiation 15s under 1000W power naturally cools to room temperature then, gets black suspension; With 5
#Sand core funnel carries out repeatedly suction filtration, cleaning to this black suspension, and is constant until pH value of filtrate; With the oven dry of solid isolate, promptly get the charcoal-aero gel of modification then.
Embodiment 4
Take by weighing charcoal-aero gel 3.5g, measure the NH of concentration 5mol/L
3H
2O solution 100mL joins charcoal-aero gel and ammonia soln and carries out supersound process 1h in the container, and it is mixed; The gained mixture is placed microwave oven, and irradiation 20s under 1000W power naturally cools to room temperature then, gets black suspension; With 5
#Sand core funnel carries out repeatedly suction filtration, cleaning to this black suspension, and is constant until pH value of filtrate; With the oven dry of solid isolate, promptly get the charcoal-aero gel of modification then.
Claims (2)
1. a charcoal-aero gel surface modifying method comprises the steps:
(1) according to charcoal-aero gel: NH
3H
2The O mass ratio is 1: 1～1: 9 a ratio, is that the ammoniacal liquor of 1～5mol/L joins and carries out the ultrasonic 10min of mixing～6h in the container with charcoal-aero gel and concentration, obtains uniform mixture;
(2) uniform mixture in the step (1) being placed rated frequency is 2450 ± 10MHz, and output rating is to carry out irradiation reaction 5～20s in the microwave oven of 100W～3000KW, naturally cools to room temperature then, makes black suspension;
(3) black suspension in the step (2) is separated obtain charcoal-aero gel, stop when filtrating pH value is constant with the washed with de-ionized water charcoal-aero gel, the charcoal-aero gel after will cleaning then carries out drying, promptly obtains the charcoal-aero gel of modification.
2. according to a kind of charcoal-aero gel surface modifying method of claim 1, it is characterized in that the modification charcoal-aero gel that this method obtains is mainly used in energy storage material and devices field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101962999A CN102390826A (en) | 2011-07-14 | 2011-07-14 | Carbon aerogel surface modification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101962999A CN102390826A (en) | 2011-07-14 | 2011-07-14 | Carbon aerogel surface modification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102390826A true CN102390826A (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101962999A Pending CN102390826A (en) | 2011-07-14 | 2011-07-14 | Carbon aerogel surface modification method |
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| CN (1) | CN102390826A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357090A (en) * | 2019-07-19 | 2019-10-22 | 广东工业大学 | A kind of preparation method of the Nano diamond hydrosol |
| CN114634172A (en) * | 2022-03-07 | 2022-06-17 | 山东重山光电材料股份有限公司 | Preparation method of carbon fluoride material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395988A (en) * | 2001-07-12 | 2003-02-12 | 中国科学院山西煤炭化学研究所 | Process for preparing carbon aerogel |
| CN101704501A (en) * | 2009-10-09 | 2010-05-12 | 上海微纳科技有限公司 | Method for modifying carbon aerogel through radiation oxidation by microwave |
| US20110053765A1 (en) * | 2005-11-30 | 2011-03-03 | Energ2, Inc. | Carbon-based foam nanocomposite hydrogen storage material |
-
2011
- 2011-07-14 CN CN2011101962999A patent/CN102390826A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395988A (en) * | 2001-07-12 | 2003-02-12 | 中国科学院山西煤炭化学研究所 | Process for preparing carbon aerogel |
| US20110053765A1 (en) * | 2005-11-30 | 2011-03-03 | Energ2, Inc. | Carbon-based foam nanocomposite hydrogen storage material |
| CN101704501A (en) * | 2009-10-09 | 2010-05-12 | 上海微纳科技有限公司 | Method for modifying carbon aerogel through radiation oxidation by microwave |
Non-Patent Citations (1)
| Title |
|---|
| 刘亚菲等: "活性炭电极材料的表面改性和性能", 《物理化学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110357090A (en) * | 2019-07-19 | 2019-10-22 | 广东工业大学 | A kind of preparation method of the Nano diamond hydrosol |
| CN110357090B (en) * | 2019-07-19 | 2020-12-29 | 广东工业大学 | Preparation method of nano-diamond hydrosol |
| CN114634172A (en) * | 2022-03-07 | 2022-06-17 | 山东重山光电材料股份有限公司 | Preparation method of carbon fluoride material |
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Application publication date: 20120328 |