JP2018053375A - Carbon fiber coated with thin film containing nano-carbon material and method for producing the same - Google Patents
Carbon fiber coated with thin film containing nano-carbon material and method for producing the same Download PDFInfo
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 42
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000010409 thin film Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000003575 carbonaceous material Substances 0.000 title claims description 3
- 229910021392 nanocarbon Inorganic materials 0.000 title description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 36
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 36
- 239000007864 aqueous solution Substances 0.000 claims abstract description 28
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 14
- 239000006185 dispersion Substances 0.000 claims abstract description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 10
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 10
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 10
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 10
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 10
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 10
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 7
- 235000012501 ammonium carbonate Nutrition 0.000 claims abstract description 4
- 239000006229 carbon black Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 16
- 229910052799 carbon Inorganic materials 0.000 description 10
- 239000002994 raw material Substances 0.000 description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000011187 glycerol Nutrition 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910021387 carbon allotrope Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical class C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002048 multi walled nanotube Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
Description
本発明は、表面にナノ炭素材料を含有する薄膜を形成することで導電性が向上された炭素繊維を製造する方法に関するものである。 The present invention relates to a method for producing a carbon fiber having improved conductivity by forming a thin film containing a nanocarbon material on the surface.
炭素繊維は、ポリアクリロニトリル繊維、ピッチ繊維、レーヨンなどの有機繊維を不活性雰囲気中で加熱して炭素以外の元素を脱離させることで製造される、約９０％〜１００％が炭素成分の繊維である。
炭素繊維は、強度、弾性、軽量性、耐熱性、化学的安定性などに優れており、従来の金属材料を代替する新材料としての幅広い分野での利用が期待されている。また、主成分が炭素であり導電性を有するため、電極等の材料としても利用が可能である。
Carbon fiber is produced by heating organic fibers such as polyacrylonitrile fiber, pitch fiber, rayon, etc. in an inert atmosphere to desorb elements other than carbon, and fiber with about 90% to 100% carbon component. It is.
Carbon fiber is excellent in strength, elasticity, lightness, heat resistance, chemical stability, and the like, and is expected to be used in a wide range of fields as a new material that replaces conventional metal materials. Further, since the main component is carbon and it has conductivity, it can be used as a material for electrodes and the like.
炭素は、従来、グラファイト、ダイヤモンド、無定形炭素など、性質が大きく異なる複数の同素体が存在することが明らかとなっていた。１９８０年代以降次々と新発見されたナノメートルサイズの炭素の同素体は、従来知られていた炭素同素体とは全く異なる原子構造や物性を有することが確かめられ、その工業的利用価値の高さが注目されている。本明細書ではそれらを「ナノ炭素材料」と称し、カーボンナノチューブ、カーボンナノファイバー、ナノグラフェン、フラーレン、カーボンナノホーン、カーボンマイクロコイル、カーボンブラック、ダイヤモンドライクカーボン、カーボンナノクリスタル、活性炭などであって、数ｎｍ〜１０μｍ程度のサイズのものを含むものとする。 Conventionally, it has been clarified that carbon has a plurality of allotropes having greatly different properties such as graphite, diamond, and amorphous carbon. Nanometer-sized carbon allotropes that have been newly discovered since the 1980s have been confirmed to have completely different atomic structures and physical properties from the conventionally known carbon allotropes. Has been. In the present specification, these are referred to as “nanocarbon materials”, and are carbon nanotubes, carbon nanofibers, nanographene, fullerenes, carbon nanohorns, carbon microcoils, carbon black, diamond-like carbon, carbon nanocrystals, activated carbon, etc. The one having a size of about 10 nm to 10 μm is included.
ナノ炭素材料は炭素のみから構成されるため、極めて軽量で、高強度で、導電性を有する高分子材料である。その導電性は銅よりも優れ、強度は鋼よりも優れ、耐熱性が高く、多くの薬品に対しても反応せず、大気中で安定である。
ナノ炭素材料の中でも、カーボンナノチューブは、特に優れた電気特性、力学特性、熱特性などを示すものであり、様々な材料への応用が期待され、広く研究開発が行われている。例えば、カーボンナノチューブと樹脂とを混合した複合材とし、あるいはカーボンナノチューブ分散液をバインダーとを混合して乾燥させたものから、様々な用途の材料が得られる。
Since the nanocarbon material is composed only of carbon, it is a polymer material that is extremely lightweight, high in strength, and conductive. Its conductivity is superior to copper, strength is superior to steel, heat resistance is high, it does not react to many chemicals, and is stable in the atmosphere.
Among nanocarbon materials, carbon nanotubes exhibit particularly excellent electrical properties, mechanical properties, thermal properties, etc., and are expected to be applied to various materials, and are widely researched and developed. For example, a material for various uses can be obtained from a composite material in which carbon nanotubes and a resin are mixed, or a carbon nanotube dispersion mixed with a binder and dried.
上述したような炭素繊維及びナノ炭素材料の優れた性質に着目し、様々な炭素複合材料が提案されている。
特許文献１には、炭素繊維の表面に、単離分散したカーボンナノチューブが互いに絡み合った状態でネットワーク状の薄膜を形成することで、樹脂等の母材との密着強度が向上された炭素繊維複合素材が提案されている。
Paying attention to the excellent properties of the carbon fibers and nanocarbon materials as described above, various carbon composite materials have been proposed.
Patent Document 1 discloses a carbon fiber composite in which adhesion strength with a base material such as a resin is improved by forming a network-like thin film in a state in which isolated and dispersed carbon nanotubes are intertwined with each other on the surface of carbon fiber. Material has been proposed.
上述した特許文献１記載の発明においては、炭素繊維表面におけるカーボンナノチューブ薄膜の形成により樹脂等の母材との密着強度が向上するという効果が記載されている。しかしながら、この炭素繊維複合素材の導電性については一切言及がなされていない。炭素繊維表面の薄膜中のカーボンナノチューブの分散性が導電性に大きく影響を与えるものと考えられるが、特許文献１では薄膜中のカーボンナノチューブの分散状態についてなんらの試験も評価も行われておらず、炭素繊維表面におけるカーボンナノチューブ薄膜の形成が導電性の向上にどれほど寄与しているかも不明である。 In the invention described in Patent Document 1 described above, the effect that adhesion strength with a base material such as a resin is improved by forming a carbon nanotube thin film on the surface of the carbon fiber is described. However, no mention is made of the conductivity of the carbon fiber composite material. Although it is considered that the dispersibility of the carbon nanotubes in the thin film on the surface of the carbon fiber has a great influence on the conductivity, Patent Document 1 does not perform any test or evaluation on the dispersion state of the carbon nanotubes in the thin film. It is also unclear how much the formation of the carbon nanotube thin film on the carbon fiber surface contributes to the improvement of conductivity.
本発明は、このような実情に鑑みてなされたものであり、表面にカーボンナノチューブを良好な分散状態で含有する薄膜を形成することで導電性が向上された炭素繊維を製造する方法を提供しようとするものである。 The present invention has been made in view of such circumstances, and provides a method for producing a carbon fiber having improved conductivity by forming a thin film containing carbon nanotubes in a well dispersed state on the surface. It is what.
上記解決課題に鑑みて鋭意研究の結果、本発明者は、カーボンナノチューブ、アンモニウム塩、炭酸水素塩を含み、カーボンナノチューブが好適に分散された水溶液を薄膜材料として炭素繊維表面に塗布し乾燥させることにより、分散液での好適な分散状態が保持されたまま薄膜を形成することができることを発見し、本発明を成すに至った。
すなわち、本発明は、カーボンナノチューブと、カルボキシメチルセルロースアンモニウムと、炭酸水素アンモニウムとを添加した水溶液を調整し、前記水溶液に対してカーボンナノチューブの分散処理を行い分散水溶液とし、前記分散水溶液を炭素繊維に塗布し又は含浸させ、乾燥させて薄膜化することにより、カーボンナノチューブを含有する薄膜を被覆された炭素繊維を製造する方法を提供するものである。
As a result of diligent research in view of the above problems, the present inventors apply an aqueous solution containing carbon nanotubes, ammonium salts, and hydrogen carbonates, in which carbon nanotubes are suitably dispersed, as a thin film material and dry the carbon fiber surface Thus, it was discovered that a thin film can be formed while maintaining a preferable dispersion state in the dispersion, and the present invention has been achieved.
That is, the present invention prepares an aqueous solution in which carbon nanotubes, carboxymethyl cellulose ammonium, and ammonium hydrogen carbonate are added, disperses the carbon nanotubes in the aqueous solution to obtain a dispersed aqueous solution, and the dispersed aqueous solution is converted into carbon fiber. The present invention provides a method for producing carbon fibers coated with a thin film containing carbon nanotubes by applying or impregnating and drying to form a thin film.
上述した本発明の製造方法において、前記水溶液には、カーボンナノチューブ１重量部に対して、カルボキシメチルセルロースアンモニウム１〜５重量部、炭酸水素アンモニウム１〜５重量部が含まれていることを特徴とする。
上述した本発明の製造方法において、前記分散処理は超音波照射によって行うことを特徴とする。
上述した本発明の製造方法において、前記水溶液は、グラフェン、カーボンブラック、活性炭のうち１種類又は２種類以上の炭素材料をさらに含むことを特徴とする。
In the production method of the present invention described above, the aqueous solution contains 1 to 5 parts by weight of carboxymethyl cellulose ammonium and 1 to 5 parts by weight of ammonium hydrogen carbonate with respect to 1 part by weight of carbon nanotubes. .
In the manufacturing method of the present invention described above, the dispersion treatment is performed by ultrasonic irradiation.
In the production method of the present invention described above, the aqueous solution further includes one or more carbon materials among graphene, carbon black, and activated carbon.
以上、説明したように、本発明によれば、表面にカーボンナノチューブを良好な分散状態で含有する薄膜を形成することで導電性が向上された炭素繊維を製造する方法が提供される。 As described above, according to the present invention, a method for producing a carbon fiber with improved conductivity by forming a thin film containing carbon nanotubes in a good dispersion state on the surface is provided.
以下、本発明のナノ炭素材料を含有する薄膜を被覆された炭素繊維及びその製造方法の実施例として、カーボンナノチューブを含有する薄膜を被覆された炭素繊維を製造する方法とその製造物が示す物性の試験結果について説明する。 Hereinafter, as an example of a carbon fiber coated with a thin film containing a nanocarbon material of the present invention and a method for producing the same, a method for producing a carbon fiber coated with a thin film containing a carbon nanotube and physical properties of the product are shown. The test results will be described.
＜実施例１＞
≪原材料水溶液の調製≫
カーボンナノチューブは、多層カーボンナノチューブ（Ｎａｎｏｃｙｌ社製、ＮＣ７０００（平均直径９．５ｎｍ、平均長さ１．５μｍ、比表面積２５０〜３００ｍ２／ｇ、炭素純度９０％））を用いた。
カルボキシメチルセルロースアンモニウムは、株式会社ファインクレイ製の製品名「ＣＭＣＡ２５」（カルボキシメチルセルロースアンモニウム２５％水和物）を用いた。
炭酸水素アンモニウムは、宇部興産株式会社製品（製品コード：ＩＯ−Ｂ１４−００１６、純度９５．０％以上）を用いた。
３００ｍｌの水に、カーボンナノチューブ２ｇ、カルボキシメチルセルロースアンモニウム１０ｇ、炭酸水素アンモニウム１０ｇ、グリセリン２ｇを溶解して原材料水溶液を得た。
<Example 1>
≪Preparation of raw material aqueous solution≫
As the carbon nanotube, a multi-wall carbon nanotube (manufactured by Nanocyl, NC7000 (average diameter 9.5 nm, average length 1.5 μm, specific surface area 250 to 300 m 2 / g, carbon purity 90%)) was used.
As the carboxymethyl cellulose ammonium, a product name “CMCA25” (carboxymethyl cellulose ammonium 25% hydrate) manufactured by Fine Clay Co., Ltd. was used.
Ube Industries, Ltd. product (product code: IO-B14-0016, purity 95.0% or more) was used for ammonium hydrogen carbonate.
In 300 ml of water, 2 g of carbon nanotubes, 10 g of carboxymethylcellulose ammonium, 10 g of ammonium bicarbonate, and 2 g of glycerin were dissolved to obtain an aqueous raw material solution.
≪分散処理≫
この原材料水溶液に、超音波ホモジナイザー（三井電気精機株式会社製、型式：ＵＸ−６００、発振周波数２０±１ＫＨｚ、最大出力６００Ｗ）により２０分間超音波を照射して、カーボンナノチューブの分散水溶液を得た。
≪Distributed processing≫
This raw material aqueous solution was irradiated with ultrasonic waves for 20 minutes using an ultrasonic homogenizer (Mitsui Denki Seiki Co., Ltd., model: UX-600, oscillation frequency 20 ± 1 KHz, maximum output 600 W) to obtain a dispersed aqueous solution of carbon nanotubes. .
≪炭素繊維への塗布・含浸及び乾燥処理≫
炭素繊維は、東レ株式会社の製品を用いた。
この炭素繊維を分散水溶液に含浸した後、１４０℃で３０分間焼付け処理を行い、分散水溶液の水分及びアンモニア成分を蒸発させて炭素繊維の表面を乾燥させた。この含浸及び焼付け処理を３回繰り返した。
以上の手順により、カーボンナノチューブを含有する薄膜を被覆された炭素繊維を得た。
≪Coating, impregnation and drying treatment on carbon fiber≫
The carbon fiber used was a product of Toray Industries, Inc.
After impregnating the carbon fiber with the aqueous dispersion, baking treatment was performed at 140 ° C. for 30 minutes to evaporate the water and ammonia components of the aqueous dispersion, thereby drying the surface of the carbon fiber. This impregnation and baking process was repeated three times.
By the above procedure, carbon fibers coated with a thin film containing carbon nanotubes were obtained.
＜実施例２＞
≪原材料水溶液の調製≫
カーボンナノチューブ、カルボキシメチルセルロースアンモニウム、炭酸水素アンモニウムは、実施例１と同じ製品を用いた。
３００ｍｌの水に、カーボンナノチューブ３ｇ、カルボキシメチルセルロースアンモニウム３ｇ、炭酸水素アンモニウム３ｇを溶解して原材料水溶液を得た。
<Example 2>
≪Preparation of raw material aqueous solution≫
The same products as in Example 1 were used for carbon nanotubes, carboxymethyl cellulose ammonium, and ammonium hydrogen carbonate.
In 300 ml of water, 3 g of carbon nanotubes, 3 g of carboxymethyl cellulose ammonium and 3 g of ammonium hydrogen carbonate were dissolved to obtain an aqueous raw material solution.
≪分散処理≫
この原材料水溶液に、超音波ホモジナイザー（実施例１と同じ製品）により２０分間超音波を照射して、カーボンナノチューブの分散水溶液を得た。
≪Distributed processing≫
This raw material aqueous solution was irradiated with ultrasonic waves for 20 minutes by an ultrasonic homogenizer (the same product as in Example 1) to obtain a dispersed aqueous solution of carbon nanotubes.
≪炭素繊維への塗布・含浸及び乾燥処理≫
炭素繊維（実施例１と同じ製品）を分散水溶液に含浸した後、１４０℃で３０分間焼付け処理を行い、分散水溶液の水分及びアンモニア成分を蒸発させて炭素繊維の表面を乾燥させた。この含浸及び焼付け処理を３回繰り返した。
以上の手順により、カーボンナノチューブを含有する薄膜を被覆された炭素繊維を得た。
≪Coating, impregnation and drying treatment on carbon fiber≫
After impregnating carbon fiber (the same product as in Example 1) into the dispersion aqueous solution, baking treatment was performed at 140 ° C. for 30 minutes to evaporate water and ammonia components of the dispersion aqueous solution, thereby drying the surface of the carbon fiber. This impregnation and baking process was repeated three times.
By the above procedure, carbon fibers coated with a thin film containing carbon nanotubes were obtained.
＜実施例３＞
≪炭酸水素ナトリウムとグリセリンとを用いて原材料水溶液を調整≫
原材料水溶液の調整にあたって、実施例１の炭酸水素アンモニウムの代わりに、炭酸水素ナトリウムとグリセリンとの混合物を用いて、同様に薄膜を被覆された炭素繊維を得た。
<Example 3>
≪Preparation of raw material aqueous solution using sodium bicarbonate and glycerin≫
In preparing the raw material aqueous solution, a carbon fiber coated with a thin film was obtained in the same manner by using a mixture of sodium hydrogen carbonate and glycerin instead of ammonium hydrogen carbonate in Example 1.
[比較例]
以上の実施例１に対する比較例として、カーボンナノチューブの分散水溶液を塗布・含浸されていない炭素繊維（実施例１と同じ製品）を用いて評価実験を行った。
[Comparative example]
As a comparative example with respect to Example 1 described above, an evaluation experiment was performed using carbon fiber (the same product as Example 1) that was not coated / impregnated with a dispersed aqueous solution of carbon nanotubes.
[空気マグネシウム電池の電極として用いる]
実施例１と比較例の炭素繊維について、空気マグネシウム電池の空気極（正極）として用いて、幅２センチメートル、長さ５センチメートルのマグネシウム板を負極として用い、それと同等の大きさの炭素繊維を正極とし、塩化第二鉄を電解液として、炭素繊維に垂らす。そのときに解放電圧２ボルトで、どれだけのイニシャル電流が流れるかをテスターにより測定した。
マグネシウムは、権田金属工業株式会社の製品の「難燃性マグネシウム」を用いた。テスターは、共立電気計器社のAC/DCクランプ付デジタルマルチメーターを用いた。
比較例では、６６．４ミリアンペアのイニシャル電流を得られた。実施例１では、５３８．３ミリアンペアのイニシャル電流を得ることができた。
[Used as an electrode for air magnesium battery]
About the carbon fiber of Example 1 and a comparative example, it uses as an air electrode (positive electrode) of an air magnesium battery, uses a magnesium plate of width 2cm and length 5cm as a negative electrode, and carbon fiber of the magnitude | size equivalent to it Is used as a positive electrode, and ferric chloride is used as an electrolytic solution and hung on a carbon fiber. At that time, it was measured by a tester how much initial current flows at an open-circuit voltage of 2 volts.
As the magnesium, “Flame-resistant magnesium” manufactured by Gonda Metal Industry Co., Ltd. was used. The tester used was a digital multimeter with an AC / DC clamp manufactured by Kyoritsu Electric Instruments.
In the comparative example, an initial current of 66.4 milliamperes was obtained. In Example 1, an initial current of 538.3 milliamps could be obtained.
このように、実施例１の炭素繊維は、比較例の炭素繊維に比べて、電流値が顕著に大きく、８倍以上の電流密度を達成できたことが明らかとなった。 Thus, it became clear that the carbon fiber of Example 1 had a significantly larger current value than the carbon fiber of the comparative example, and was able to achieve a current density of 8 times or more.
以上、ナノ炭素材料を含有する薄膜を被覆された炭素繊維及びその製造方法について、具体的な実施の形態を示して説明したが、本発明はこれらに限定されるものではない。当業者であれば、本発明の要旨を逸脱しない範囲内において、原材料、試薬、処理条件、処理手順、測定条件、測定方法について様々な変更・改良を加えることが可能である。 As mentioned above, although the carbon fiber coated with the thin film containing nanocarbon material and its manufacturing method were shown and demonstrated concrete embodiment, this invention is not limited to these. A person skilled in the art can make various changes and improvements to the raw materials, reagents, processing conditions, processing procedures, measurement conditions, and measurement methods without departing from the scope of the present invention.
本発明のナノ炭素材料を含有する薄膜を被覆された炭素繊維及びその製造方法は、空気マグネシウム電池の電極をはじめとする無機化学分野、有機化学分野、金属科学分野ほか多くの産業において利用することができるものである。 The carbon fiber coated with a thin film containing the nanocarbon material of the present invention and the method for producing the same are used in inorganic chemistry, organic chemistry, metal science and many other industries including electrodes for air magnesium batteries. It is something that can be done.
Claims (5)
前記水溶液に対してカーボンナノチューブの分散処理を行い分散水溶液とし、
前記分散水溶液を炭素繊維に塗布し又は含浸させ、乾燥させて薄膜化することにより、
カーボンナノチューブを含有する薄膜を被覆された炭素繊維を製造する方法。 Prepare an aqueous solution to which carbon nanotubes, carboxymethyl cellulose ammonium, and ammonium hydrogen carbonate are added,
Dispersing the carbon nanotubes to the aqueous solution to obtain a dispersed aqueous solution,
By applying or impregnating the dispersed aqueous solution to carbon fiber, drying and thinning,
A method for producing a carbon fiber coated with a thin film containing carbon nanotubes.
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