JP2003238126A - Hydrophilic dispersion fluid of carbon nanotube and its manufacturing method - Google Patents
Hydrophilic dispersion fluid of carbon nanotube and its manufacturing methodInfo
- Publication number
- JP2003238126A JP2003238126A JP2002036353A JP2002036353A JP2003238126A JP 2003238126 A JP2003238126 A JP 2003238126A JP 2002036353 A JP2002036353 A JP 2002036353A JP 2002036353 A JP2002036353 A JP 2002036353A JP 2003238126 A JP2003238126 A JP 2003238126A
- Authority
- JP
- Japan
- Prior art keywords
- hydrophilic
- carbon nanotubes
- compound
- carbon
- hydrophobic part
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、カーボンナノチュ
ーブの親水性分散液、およびその製造方法に関する。TECHNICAL FIELD The present invention relates to a hydrophilic dispersion of carbon nanotubes and a method for producing the same.
【０００２】[0002]
【従来の技術】カーボンナノチューブは、複合材料、ナ
ノエレクトロニクス、電子源、ナノメカニクス／電子機
械、エネルギー、化学の分野への利用に大きく期待され
ている。2. Description of the Related Art Carbon nanotubes are highly expected to be used in the fields of composite materials, nanoelectronics, electron sources, nanomechanics / electromechanics, energy and chemistry.
【０００３】ところで、カーボンナノチューブを溶媒に
分散することは、ナノリアクターに用いたり、種々の素
材の表面改質をする場合に必要であるが、カーボンナノ
チューブそのままだと、親水性液体にも疎水性液体にも
分散しない。そこで、カーボンナノチューブに修飾を施
すことによって分散する技術が検討されている。例え
ば、特開２００１−４８５１１号には、電子放出素子と
表示装置に用いるカーボン薄膜の製造過程において、電
気化学的に酸化および／または還元可能な界面活性剤に
よりカーボンナノチューブ粒子をミセル化して水性媒体
中に分散または可溶化する技術、また、Science２８２
巻，Ｐ９５（１９９８）には、Chenらが、超音波法を用
いて切断されたカーボンナノチューブの端を、オクタデ
シルアミンとジクロロカルベンで修飾することにより、
ベンゼンなどの有機溶媒に可溶なカーボンナノチューブ
を合成する技術を開示している。しかしながら、これら
は、操作が煩雑であったり、効果が充分ではなかった
り、化学修飾することにより、カーボンナノチューブの
導電性が損なわれたりする問題があった。また、有機溶
媒は例えばベンゼンは発ガン性がある等、昨今の環境衛
生面から取り扱いが面倒であったりするという問題があ
った。By the way, it is necessary to disperse carbon nanotubes in a solvent for use in a nanoreactor or for surface modification of various materials. However, if carbon nanotubes are left as they are, they are hydrophobic to hydrophilic liquids. Does not disperse in liquids. Therefore, a technique for dispersing carbon nanotubes by modifying them has been studied. For example, in Japanese Patent Laid-Open No. 2001-48511, in a process of manufacturing a carbon thin film used for an electron-emitting device and a display device, a carbon nanotube particle is micelle-ized by a surfactant which can be electrochemically oxidized and / or reduced to form an aqueous medium Technology to disperse or solubilize inside, Science 282
Vol., P95 (1998), Chen et al., By modifying the ends of carbon nanotubes cut using an ultrasonic method with octadecylamine and dichlorocarbene,
A technique for synthesizing carbon nanotubes soluble in an organic solvent such as benzene is disclosed. However, these have problems that the operation is complicated, the effect is not sufficient, and that the conductivity of the carbon nanotubes is impaired by chemical modification. Further, as an organic solvent, for example, benzene has a carcinogenic property, and thus there is a problem that handling is troublesome from the viewpoint of environmental hygiene these days.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記問題点
を解決し、カーボンナノチューブを簡単に、かつ安定に
親水性液体に分散する方法を提供するものである。The present invention solves the above problems and provides a method for easily and stably dispersing carbon nanotubes in a hydrophilic liquid.
【０００５】[0005]
【課題を解決するための手段】本発明は、鋭意検討した
結果、下記骨子によって上記課題を解決するものであ
る。As a result of intensive studies, the present invention solves the above problems by the following gist.
【０００６】即ち、本発明は、次の構成要素（Ａ），
（Ｂ），（Ｃ）を含んでなることを特徴とするカーボン
ナノチューブの親水性分散液である。
（Ａ）カーボンナノチューブ
（Ｂ）分散剤
（Ｃ）疎水部−親水部−疎水部の構造を有する化合物
または、分散剤および疎水部−親水部−疎水部の構造を
有する化合物を用いてカーボンナノチューブを親水性溶
媒中に分散させることを特徴とするカーボンナノチュー
ブの親水性分散液の製造方法である。That is, the present invention has the following components (A),
A hydrophilic dispersion liquid of carbon nanotubes comprising (B) and (C). (A) Carbon nanotube (B) Dispersant (C) A compound having a hydrophobic part-hydrophilic part-hydrophobic part structure or a compound having a dispersant and a hydrophobic part-hydrophilic part-hydrophobic part structure is used to form a carbon nanotube. A method for producing a hydrophilic dispersion of carbon nanotubes, which comprises dispersing in a hydrophilic solvent.
【０００７】[0007]
【発明の実施の形態】以下、本発明をより詳細に説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below.
【０００８】本発明において構成要素（Ａ）はカーボン
ナノチューブである。ここでカーボンナノチューブと
は、グラファイトの１枚面（グラフェンあるいはグラフ
ェンシート）を筒形に巻いた形状を持っており、その直
径はおおよそ数ｎｍから１００ｎｍの値で、長さはおお
よそ数ｎｍ〜数μｍである。カーボンナノチューブに
は、ただ１枚のグラフェンシートが筒状になった単層
や、それらが重層構造になった多層があり、そのいずれ
も指すが、本発明はとりわけ、電気伝導性や熱伝導性の
効果が高く発揮される単層カーボンナノチューブを一個
一個独立して分散するのに好適に用いられる。また、物
性の良好さから、直径は、１００ｎｍ以下が好ましく、
５０ｎｍ以下がより好ましく、１０ｎｍ以下がなお好ま
しい。長さは１０ｎｍ〜１ｍｍが好ましく、１００ｎｍ
〜１ｍｍがより好ましく、５００ｎｍ〜１ｍｍがなお好
ましい。In the present invention, the constituent element (A) is a carbon nanotube. Here, the carbon nanotube has a shape in which one surface of graphite (graphene or a graphene sheet) is rolled into a cylindrical shape, and the diameter thereof is a value of about several nm to 100 nm and the length is about several nm to several nm. μm. The carbon nanotube includes a single layer in which only one graphene sheet is in a tubular shape and a multi-layer in which they are in a multilayer structure. Both of them are mentioned, but the present invention is particularly concerned with electrical conductivity and thermal conductivity. It is preferably used to independently disperse the single-walled carbon nanotubes that exhibit the above effect highly. Further, from the viewpoint of good physical properties, the diameter is preferably 100 nm or less,
50 nm or less is more preferable, and 10 nm or less is still more preferable. The length is preferably 10 nm to 1 mm, 100 nm
˜1 mm is more preferred, and 500 nm to 1 mm is still more preferred.
【０００９】通常、このような炭素から成る物質は、炭
を見ても判るように、水を弾くものであり、これを単に
水に入れただけでは分散しない。そこで、分散剤として
作用する界面活性剤を添加して分散するのが一般的であ
るが、カーボンナノチューブの場合、凝集力が著しく強
く、容易に分散剤で完全に分散できるものではなかっ
た。[0009] Usually, such a substance made of carbon repels water as can be seen from charcoal, and does not disperse when it is simply put in water. Therefore, it is general to add and disperse a surfactant acting as a dispersant, but in the case of carbon nanotubes, the cohesive force is extremely strong, and it has not been possible to easily completely disperse with the dispersant.
【００１０】そこで本発明では、鋭意検討した結果、分
散剤の他に疎水部−親水部−疎水部の構造を有する化合
物を併用すると、極めて良好にカーボンナノチューブを
分散できることが判明した。Therefore, in the present invention, as a result of diligent studies, it was found that carbon nanotubes can be dispersed very well by using a compound having a structure of a hydrophobic portion-hydrophilic portion-hydrophobic portion in addition to a dispersant.
【００１１】本発明において、構成要素（Ｂ）の分散剤
は、種類が限定されるものではなく、アニオン性、両
性、カチオン性、非イオン性のいずれのタイプも使用で
きるが、好ましくは、アニオン性の界面活性剤であり、
より好ましくはアルキルベンゼンスルホン酸塩及び／ま
たはアルキルエーテル硫酸塩から成るものであり、塩の
カウンターイオンは、特に限定されるものはないが、ア
ルカリ金属類、アルカリ土類金属類、アミン類などが挙
げられ、例えばカリウム、ナトリウム、トリエタノール
アミン等が好ましく用いられる。In the present invention, the dispersant of the constituent element (B) is not limited in kind, and any of anionic, amphoteric, cationic and nonionic types can be used, but the anion is preferable. Is a surface active agent,
More preferably, it is composed of an alkylbenzene sulfonate and / or an alkyl ether sulfate, and the counter ion of the salt is not particularly limited, but examples thereof include alkali metals, alkaline earth metals, amines and the like. For example, potassium, sodium, triethanolamine and the like are preferably used.
【００１２】本発明おける構成要素（Ｃ）である、疎水
部−親水部−疎水部の構造を有する化合物としては、特
に種類は限定されないが、疎水部が炭素数１〜２０の整
数であるアルキル基であることが好ましい。炭素数は、
アルキル基が直鎖型であるか分岐型であるか、また、親
水部とのバランスはどうか等によって決まるので一概に
は言えないが、あまり炭素数が少なすぎると化合物全体
として親水性になり過ぎ、逆に多すぎると化合物全体と
して疎水性になり過ぎるので、炭素数は２〜１６がより
好ましく、４〜１４がなお好ましい。また、親水部が水
酸基、エチレンオキサイド、炭素−炭素３重結合、カル
ボキシル基やスルホン酸基、アミノ基等のイオン性基か
ら選ばれる少なくとも一つが好ましく、組み合わされて
いても良い。例えば、スルホコハク酸ジエステルは好ま
しく用いられる一例であり、具体的には、ジオクチルス
ルホコハク酸塩（スルホコハク酸−２−ジエチルヘキシ
ルナトリウム塩）が挙げられる。また、下記式Ｉの化合
物も好ましく用いられる。The compound having a structure of a hydrophobic part-hydrophilic part-hydrophobic part, which is the constituent element (C) in the present invention, is not particularly limited, but the hydrophobic part is an alkyl having 1 to 20 carbon atoms. It is preferably a group. The carbon number is
It cannot be said unequivocally because the alkyl group is linear or branched, and the balance with the hydrophilic part is determined, but if the carbon number is too small, the compound as a whole becomes too hydrophilic. On the other hand, if the amount is too large, the compound as a whole becomes too hydrophobic, so the number of carbon atoms is more preferably 2 to 16, and still more preferably 4 to 14. Further, the hydrophilic portion is preferably at least one selected from a hydroxyl group, ethylene oxide, a carbon-carbon triple bond, an ionic group such as a carboxyl group, a sulfonic acid group, and an amino group, and may be combined. For example, sulfosuccinic acid diester is one example that is preferably used, and specific examples thereof include dioctyl sulfosuccinic acid salt (sulfosuccinic acid-2-diethylhexyl sodium salt). Further, the compound of the following formula I is also preferably used.
【００１３】[0013]
【化２】 [Chemical 2]
【００１４】ここで、ａ＋ｂ＝０〜３０であるのが好ま
しい。より好ましくはａ＋ｂ＝０〜１０、更に好ましく
はa＋ｂ＝０〜７である。これらの作用機構は、明らか
ではないが、凝集し合うカーボンナノチューブ間に、先
ず疎水部−親水部−疎水部の構造を有する化合物が割り
入り、次いでそこに分散剤が吸着し、分散に至るものと
推定される。Here, it is preferable that a + b = 0 to 30. More preferably, a + b = 0 to 10, and even more preferably a + b = 0 to 7. The mechanism of action of these is not clear, but a compound having a structure of a hydrophobic part-hydrophilic part-hydrophobic part intervenes between the carbon nanotubes that aggregate with each other, and then the dispersant is adsorbed there, leading to dispersion. It is estimated to be.
【００１５】使用濃度は、使用される分散剤や疎水部−
親水部−疎水部の構造を有する化合物の分子量や、その
能力にも依るので、一律に規定できるものではないが、
概ね、カーボンナノチューブに対し、分散剤が０．５〜
５００重量％が好ましく、１〜１００重量％がより好ま
しく、１〜５０重量％が更に好ましい。The concentration used depends on the dispersant and hydrophobic part used.
Although it depends on the molecular weight of the compound having a hydrophilic part-hydrophobic part structure and its ability, it cannot be uniformly defined.
Generally, the dispersant is 0.5 to
500 weight% is preferable, 1-100 weight% is more preferable, 1-50 weight% is still more preferable.
【００１６】疎水部−親水部−疎水部の構造を有する化
合物については、カーボンナノチューブに対し、０．１
〜１００重量％が好ましく、０．５〜５０重量％がより
好ましく、１〜２０重量％が更に好ましい。Regarding the compound having a structure of hydrophobic part-hydrophilic part-hydrophobic part, it is 0.1
-100% by weight is preferable, 0.5-50% by weight is more preferable, 1-20% by weight is further preferable.
【００１７】カーボンナノチューブの液体に対する濃度
は、特に限定されるものではないが、薄すぎると利用価
値が低くなることが多く、濃すぎると分散安定性が低下
することもあるので、０．０００１〜１重量％が好まし
く、０．００５〜０．５重量％がより好ましく、０．０
１〜０．１重量％が特に好ましい。The concentration of the carbon nanotubes in the liquid is not particularly limited, but if it is too thin, the utility value is often low, and if it is too thick, the dispersion stability may decrease, so 0.0001- 1 wt% is preferable, 0.005-0.5 wt% is more preferable, 0.0
1 to 0.1% by weight is particularly preferred.
【００１８】本発明に用いられるカーボンナノチューブ
を分散する液体は、親水性液体であれば良く、親水性液
体としては、水、メタノール、エタノール、プロパノー
ル、イソプロパノール、ブタノールなどの１価アルコー
ル、エチレングリコール、プロピレングリコール、ブタ
ンジオールなどの２価アルコール、グリセリンなどの３
価アルコール、アセトンなどのケトン類、蟻酸、酢酸、
プロピオン酸などの酸、テトラヒドロフラン等の環状エ
ーテル、Ｎ−メチルピロリドン、ジメチルスルフォキサ
イドなどが挙げられる。 これらは複数を混合して用い
ても良い。中でも取り扱い性や環境面を考慮すると水を
含む水系液体であることが好ましく、特に純水は好まし
い。The liquid for dispersing the carbon nanotubes used in the present invention may be any hydrophilic liquid, and examples of the hydrophilic liquid include water, monohydric alcohols such as methanol, ethanol, propanol, isopropanol and butanol, ethylene glycol, Dihydric alcohols such as propylene glycol and butanediol, 3 such as glycerin
Dihydric alcohol, ketones such as acetone, formic acid, acetic acid,
Examples thereof include acids such as propionic acid, cyclic ethers such as tetrahydrofuran, N-methylpyrrolidone, and dimethyl sulfoxide. A plurality of these may be mixed and used. Among them, an aqueous liquid containing water is preferable, and pure water is particularly preferable, in consideration of handleability and environment.
【００１９】また、本発明の親水性分散液中には必要に
応じて塩、ｐＨ調整剤、防腐剤、粘度調整剤、キレータ
ー等が含まれていても構わない。The hydrophilic dispersion of the present invention may contain a salt, a pH adjusting agent, a preservative, a viscosity adjusting agent, a chelator, etc., if necessary.
【００２０】カーボンナノチューブを液体中に分散させ
る方法としては、特に限定されないが超音波や各種攪拌
を用いることができる。攪拌方法としては、ホモナイザ
ーのような高速攪拌やアトライター、ボールミルなどの
機械的衝撃を加える攪拌も適用できる。The method of dispersing the carbon nanotubes in the liquid is not particularly limited, but ultrasonic waves and various kinds of stirring can be used. As the stirring method, high-speed stirring such as a homogenizer or stirring with mechanical impact such as an attritor or a ball mill can be applied.
【００２１】本発明における分散液とはカーボンナノチ
ューブが液中に散在し、あたかも外見上は一様に見える
状態を言う。本発明の分散液は１０日以上放置してもカ
ーボンナノチューブが沈降することも凝集することもな
く、外見上一様な分散状態である。更には３０日以上放
置しても外見上一様であることが好ましい。The dispersion liquid in the present invention means a state in which carbon nanotubes are scattered in the liquid and appear as if they are uniform in appearance. The dispersion of the present invention is in a uniformly dispersed state in appearance, without allowing the carbon nanotubes to settle or aggregate even when left standing for 10 days or more. Furthermore, it is preferable that the appearance is uniform even when left for 30 days or more.
【００２２】以上のようにして調製されたカーボンナノ
チューブの親水性分散液は、そのままの状態でも、例え
ば水系のナノリアクター等として高効率でカーボンナノ
チューブが利用できるので好ましく用いることができ
る。また、パディング法やスプレー法、電着法等、種々
の公知の塗布法を適用して適当な担体に付与した場合に
も、例えば非水系ナノリアクターや、担体がフィラーと
しての熱伝導性物質や電気伝導性物質である複合材料等
に用いると熱伝導性や電気伝導性が飛躍的に高まるので
好ましく用いることができる。The hydrophilic dispersion liquid of carbon nanotubes prepared as described above can be preferably used in the state as it is because the carbon nanotubes can be utilized with high efficiency as, for example, an aqueous nanoreactor. Further, when applied to a suitable carrier by applying various known coating methods such as padding method, spray method, electrodeposition method, etc., for example, non-aqueous nanoreactor, carrier is a thermally conductive substance as a filler or When it is used for a composite material or the like which is an electrically conductive substance, the thermal conductivity and the electrical conductivity are remarkably enhanced, so that it can be preferably used.
【００２３】[0023]
【実施例】以下、実施例によって、本発明を更に詳細に
説明する。なお、実施例によって本発明が制限されるこ
とはない。The present invention will be described in more detail with reference to the following examples. The present invention is not limited to the embodiments.
【００２４】なお、用いたカーボンナノチューブとし
て、Ｃａｒｂｏｎ Ｎａｎｏｔｅｃｈｎｏｌｏｇｉｅｓ
Ｉｎｃｏｒｐｏｒａｔｅｄ社製ＨｉＰｃｏ（ＴＭ）
Ｓｉｎｇｌｅ Ｗａｌｌ Ｃａｒｂｏｎ Ｎａｎｏｔｕ
ｂｅｓを用いた。
実施例１
以下の処方で単層カーボンナノチューブの分散液を調製
した。The carbon nanotubes used were Carbon Nanotechnologies.
HiPco (TM) made by Incorporated
Single Wall Carbon Nanotu
bes was used. Example 1 A dispersion of single-walled carbon nanotubes was prepared with the following formulation.
【００２５】
単層カーボンナノチューブ ０．０５重量部
ドデシルベンゼンスルホン酸ナトリウム ２．５重量部
式Ｉの化合物（ａ＋ｂ＝０） １重量部
純水 １００重量部
上記調製液を超音波洗浄機（株式会社エスエヌディ製Ｕ
ＳＫ−２、発信周波数３８ｋＨｚ、高周波電力１２０
Ｗ）にて２時間処理することにより単層カーボンナノチ
ューブの分散体を得た。この分散体は、３０日以上経っ
ても沈降は見られない非常に安定なものであった。
実施例２
実施例１において、式Ｉの化合物のａ＋ｂを３０に置き
換えた。Single-walled carbon nanotubes 0.05 part by weight Sodium dodecylbenzenesulfonate 2.5 parts by weight Compound of formula I (a + b = 0) 1 part by weight Pure water 100 parts by weight U made by SND
SK-2, oscillation frequency 38kHz, high frequency power 120
By treating with W) for 2 hours, a dispersion of single-walled carbon nanotubes was obtained. This dispersion was very stable with no sedimentation even after 30 days or more. Example 2 In Example 1, a + b of the compound of formula I was replaced with 30.
【００２６】その場合も、実施例１同様に安定な分散物
が得られた。
実施例３
以下の処方で単層カーボンナノチューブの分散を行っ
た。Also in this case, a stable dispersion was obtained as in Example 1. Example 3 Single-walled carbon nanotubes were dispersed according to the following formulation.
【００２７】
単層カーボンナノチューブ ０．０５重量部
ドデシルベンゼンスルホン酸ナトリウム ２．５重量部
アルキルエーテル硫酸ナトリウム ２．５重量部
式Ｉの化合物（ａ＋ｂ＝１．３） １重量部
純水 １００重量部
上記処方を超音波分散して、単層カーボンナノチューブ
の分散体を得た。この分散体は、３０日以上経っても沈
降は見られない非常に安定なものであった。
比較例１
以下の処方で単層カーボンナノチューブの分散を試み
た。実施例３から式Ｉの化合物を除去した処方である。Single-walled carbon nanotubes 0.05 part by weight Sodium dodecylbenzene sulfonate 2.5 parts by weight Sodium alkyl ether sulfate 2.5 parts by weight Compound of formula I (a + b = 1.3) 1 part by weight Pure water 100 parts by weight The above formulation was ultrasonically dispersed to obtain a dispersion of single-walled carbon nanotubes. This dispersion was very stable with no sedimentation even after 30 days or more. Comparative Example 1 Dispersion of single-walled carbon nanotubes was tried by the following formulation. 9 is a formulation in which the compound of formula I is removed from Example 3.
【００２８】
単層カーボンナノチューブ ０．０５重量部
ドデシルベンゼンスルホン酸ナトリウム ２．５重量部
アルキルエーテル硫酸ナトリウム ２．５重量部
純水 １００重量部
上記処方を超音波分散を試みたが、カーボンナノチュー
ブの均一な分散はできなかった。
比較例２
以下の処方で単層カーボンナノチューブの分散を試み
た。実施例３からドデシルベンゼンスルホン酸ナトリウ
ムとアルキルエーテル硫酸ナトリウムを除去した処方で
ある。Single-walled carbon nanotubes 0.05 parts by weight Sodium dodecylbenzene sulfonate 2.5 parts by weight Sodium alkyl ether sulfate 2.5 parts by weight Pure water 100 parts by weight Ultrasonic dispersion of the above formulation was tried. No uniform dispersion was possible. Comparative Example 2 Dispersion of single-walled carbon nanotubes was tried by the following formulation. This is a formulation in which sodium dodecylbenzenesulfonate and sodium alkyl ether sulfate were removed from Example 3.
【００２９】
単層カーボンナノチューブ ０．０５重量部
式Ｉの化合物（ａ＋ｂ＝１．３） １重量部
純水 １００重量部
上記処方を超音波分散を試みたが、カーボンナノチュー
ブの均一な分散はできなかった。
比較例３
比較例２において、式Ｉの化合物のａ＋ｂを３０に置き
換えた。Single-walled carbon nanotubes 0.05 parts by weight Compound of formula I (a + b = 1.3) 1 part by weight Pure water 100 parts by weight Ultrasonic dispersion was tried with the above formulation, but carbon nanotubes were not uniformly dispersed. There wasn't. Comparative Example 3 In Comparative Example 2, a + b of the compound of formula I was replaced with 30.
【００３０】その場合も、比較例２同様にカーボンナノ
チューブの均一な分散はできなかった。
比較例４
以下の処方で単層カーボンナノチューブの分散を試み
た。比較例２に式Ｉの化合物（ａ＋ｂ＝３０）を加えた
ものである。Even in that case, the carbon nanotubes could not be uniformly dispersed as in Comparative Example 2. Comparative Example 4 An attempt was made to disperse single-walled carbon nanotubes with the following formulation. A compound of Formula I (a + b = 30) is added to Comparative Example 2.
【００３１】
単層カーボンナノチューブ ０．０５重量部
式Ｉの化合物（ａ＋ｂ＝１．３） １重量部
式Ｉの化合物（ａ＋ｂ＝３０） １重量部
純水 １００重量部
上記処方を超音波分散を試みたが、カーボンナノチュー
ブの均一な分散はできなかった。Single-walled carbon nanotubes 0.05 part by weight Compound of formula I (a + b = 1.3) 1 part by weight Compound of formula I (a + b = 30) 1 part by weight Pure water 100 parts by weight Ultrasonic dispersion of the above formulation Attempts were made, but the carbon nanotubes could not be uniformly dispersed.
【００３２】[0032]
【発明の効果】本発明によれば、カーボンナノチューブ
を化学修飾することもなしに、簡単かつ安定に親水性液
体に分散することができる。According to the present invention, carbon nanotubes can be easily and stably dispersed in a hydrophilic liquid without chemically modifying the carbon nanotubes.
Claims (8)
んでなることを特徴とするカーボンナノチューブの親水
性分散液。 （Ａ）カーボンナノチューブ （Ｂ）分散剤 （Ｃ）疎水部−親水部−疎水部の構造を有する化合物1. A hydrophilic dispersion of carbon nanotubes comprising the following constituents (A), (B) and (C). (A) Carbon nanotube (B) Dispersant (C) Compound having a structure of hydrophobic part-hydrophilic part-hydrophobic part
面活性剤であることを特徴とする請求項１記載のカーボ
ンナノチューブの親水性分散液。2. The hydrophilic dispersion liquid of carbon nanotubes according to claim 1, wherein the dispersant of the constituent element (B) is an anionic surfactant.
ンスルホン酸塩及び／またはアルキルエーテル硫酸塩か
ら成ることを特徴とする請求項１または２にカーボンナ
ノチューブの親水性分散液。3. The hydrophilic dispersion liquid of carbon nanotubes according to claim 1, wherein the dispersant of the component (B) is an alkylbenzene sulfonate and / or an alkyl ether sulfate.
１〜２０の整数であるアルキル基であることを特徴とす
る請求項１記載のカーボンナノチューブの親水性分散
液。4. The hydrophilic dispersion liquid of carbon nanotubes according to claim 1, wherein the hydrophobic part of the compound of the constituent element (C) is an alkyl group having an integer of 1 to 20 carbon atoms.
基、エチレンオキサイド、炭素−炭素３重結合、イオン
性基から選ばれる少なくとも一つであることを特徴とす
る請求項１記載のカーボンナノチューブの親水性分散
液。5. The carbon according to claim 1, wherein the hydrophilic part of the compound of the constituent element (C) is at least one selected from a hydroxyl group, ethylene oxide, a carbon-carbon triple bond and an ionic group. Hydrophilic dispersion of nanotubes.
の構造を有する化合物がスルホコハク酸エステル及び／
または下記式Ｉで示される化合物であることを特徴とす
る請求項１〜５のいずれかに記載のカーボンナノチュー
ブの親水性分散液。 【化１】 6. A compound having a structure of hydrophobic part-hydrophilic part-hydrophobic part of the constituent element (C) is sulfosuccinate and / or
Alternatively, the hydrophilic dispersion liquid of carbon nanotubes according to any one of claims 1 to 5, which is a compound represented by the following formula I. [Chemical 1]
ることを特徴とする請求項１〜６のいずれかに記載のカ
ーボンナノチューブの親水性分散液。7. The hydrophilic dispersion liquid of carbon nanotubes according to claim 1, wherein the liquid of the hydrophilic dispersion liquid is mainly composed of water.
造を有する化合物を用いてカーボンナノチューブを親水
性液体中に分散させることを特徴とするカーボンナノチ
ューブの親水性分散液の製造方法。8. A method for producing a hydrophilic dispersion of carbon nanotubes, which comprises dispersing the carbon nanotubes in a hydrophilic liquid using a dispersant and a compound having a structure of a hydrophobic part-hydrophilic part-hydrophobic part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002036353A JP2003238126A (en) | 2002-02-14 | 2002-02-14 | Hydrophilic dispersion fluid of carbon nanotube and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002036353A JP2003238126A (en) | 2002-02-14 | 2002-02-14 | Hydrophilic dispersion fluid of carbon nanotube and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003238126A true JP2003238126A (en) | 2003-08-27 |
Family
ID=27778258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002036353A Pending JP2003238126A (en) | 2002-02-14 | 2002-02-14 | Hydrophilic dispersion fluid of carbon nanotube and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003238126A (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005123428A (en) * | 2003-10-17 | 2005-05-12 | Fuji Xerox Co Ltd | Capacitor and its manufacturing method |
| JP2005263608A (en) * | 2004-03-22 | 2005-09-29 | Kao Corp | Aqueous dispersant for carbon nanotube |
| JP2005320220A (en) * | 2004-05-11 | 2005-11-17 | Takashi Sawaguchi | Nanocarbon material dispersant, nanocarbon material dispersing method, and nanocarbon material dispersion |
| WO2005110594A1 (en) * | 2004-05-13 | 2005-11-24 | Hokkaido Technology Licensing Office Co., Ltd. | Fine carbon dispersion |
| JP2006292495A (en) * | 2005-04-08 | 2006-10-26 | Toray Ind Inc | Carbon nanotube composition, biosensor and manufacturing method of them |
| JP2007039623A (en) * | 2005-07-08 | 2007-02-15 | Hokkaido Univ | Carbon nanotube dispersion paste, carbon nanotube dispersion solution and method for producing the same |
| JP2007063107A (en) * | 2005-09-02 | 2007-03-15 | Hokkaido Univ | Method for producing carbon nanotube dispersion |
| JP2007161521A (en) * | 2005-12-13 | 2007-06-28 | Bussan Nanotech Research Institute Inc | Fine carbon fiber dispersion |
| JP2008200608A (en) * | 2007-02-20 | 2008-09-04 | Tokai Univ | Production method of conductive fluororesin thin film and conductive fluororesin thin film |
| WO2009102023A1 (en) * | 2008-02-14 | 2009-08-20 | The University Of Tokyo | Nanocarbon material dispersion, method for producing the same, and nanocarbon material structure |
| JP2009242144A (en) * | 2008-03-28 | 2009-10-22 | Toray Ind Inc | Production method of carbon nanotube film |
| JP2009242126A (en) * | 2008-03-28 | 2009-10-22 | Nof Corp | Carbon nanotube aqueous dispersion |
| JP2009273235A (en) * | 2008-05-07 | 2009-11-19 | Nikon Corp | Vibrating actuator and optical instrument |
| CN100562491C (en) * | 2006-08-23 | 2009-11-25 | 中国科学院金属研究所 | The method of a kind of purification of Multi-wall Carbon Nanotubes or carbon nano fiber |
| WO2010041750A1 (en) | 2008-10-10 | 2010-04-15 | 保土谷化学工業株式会社 | Aqueous dispersion of carbon microfibers, process for producing the aqueous dispersion, and article produced using same |
| US7858799B2 (en) | 2005-02-02 | 2010-12-28 | National Institute Of Advanced Industrial Science And Technology | Ionic organic compound |
| JP2011503243A (en) * | 2006-11-27 | 2011-01-27 | フジフィルム ディマティックス， インコーポレイテッド | Carbon nanotube ink |
| US7884300B2 (en) | 2004-08-02 | 2011-02-08 | University Of Tsukuba | Method of carbon nanotube separation, dispersion liquid and carbon nanotube obtained by the separation method |
| KR101121203B1 (en) * | 2005-07-27 | 2012-03-23 | 삼성전자주식회사 | Dispersant for high-concentrated carbon nanotube solution and composition comprising the same |
| JP2012148970A (en) * | 2012-03-09 | 2012-08-09 | Asahi Kasei Chemicals Corp | Dispersant composition |
| US8668952B2 (en) | 2008-05-16 | 2014-03-11 | Sumitomo Electric Industries, Ltd. | Carbon wire and nanostructure formed of carbon film and method of producing the same |
| JP2014187048A (en) * | 2009-06-09 | 2014-10-02 | Sivarajan Ramesh | Liquid base nanostructure carbon material (ncm) coating of bipolar plate for fuel cell |
| JP2015178102A (en) * | 2014-02-28 | 2015-10-08 | ミヨシ油脂株式会社 | Aqueous dispersion of nanocarbon material in which gemini surfactant is used as dispersant and production method of the same |
| KR20170084050A (en) | 2014-11-14 | 2017-07-19 | 도다 고교 가부시끼가이샤 | Carbon nanotube and method for manufacturing same, and lithium ion secondary battery using carbon nanotube |
-
2002
- 2002-02-14 JP JP2002036353A patent/JP2003238126A/en active Pending
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005123428A (en) * | 2003-10-17 | 2005-05-12 | Fuji Xerox Co Ltd | Capacitor and its manufacturing method |
| JP2005263608A (en) * | 2004-03-22 | 2005-09-29 | Kao Corp | Aqueous dispersant for carbon nanotube |
| JP2005320220A (en) * | 2004-05-11 | 2005-11-17 | Takashi Sawaguchi | Nanocarbon material dispersant, nanocarbon material dispersing method, and nanocarbon material dispersion |
| EP2113302A4 (en) * | 2004-05-13 | 2009-12-23 | Univ Hokkaido Nat Univ Corp | Fine carbon dispersion |
| WO2005110594A1 (en) * | 2004-05-13 | 2005-11-24 | Hokkaido Technology Licensing Office Co., Ltd. | Fine carbon dispersion |
| US7884300B2 (en) | 2004-08-02 | 2011-02-08 | University Of Tsukuba | Method of carbon nanotube separation, dispersion liquid and carbon nanotube obtained by the separation method |
| US7858799B2 (en) | 2005-02-02 | 2010-12-28 | National Institute Of Advanced Industrial Science And Technology | Ionic organic compound |
| JP2006292495A (en) * | 2005-04-08 | 2006-10-26 | Toray Ind Inc | Carbon nanotube composition, biosensor and manufacturing method of them |
| JP4742650B2 (en) * | 2005-04-08 | 2011-08-10 | 東レ株式会社 | Carbon nanotube composition, biosensor, and production method thereof |
| JP2007039623A (en) * | 2005-07-08 | 2007-02-15 | Hokkaido Univ | Carbon nanotube dispersion paste, carbon nanotube dispersion solution and method for producing the same |
| KR101121203B1 (en) * | 2005-07-27 | 2012-03-23 | 삼성전자주식회사 | Dispersant for high-concentrated carbon nanotube solution and composition comprising the same |
| JP2007063107A (en) * | 2005-09-02 | 2007-03-15 | Hokkaido Univ | Method for producing carbon nanotube dispersion |
| JP2007161521A (en) * | 2005-12-13 | 2007-06-28 | Bussan Nanotech Research Institute Inc | Fine carbon fiber dispersion |
| CN100562491C (en) * | 2006-08-23 | 2009-11-25 | 中国科学院金属研究所 | The method of a kind of purification of Multi-wall Carbon Nanotubes or carbon nano fiber |
| JP2011503243A (en) * | 2006-11-27 | 2011-01-27 | フジフィルム ディマティックス， インコーポレイテッド | Carbon nanotube ink |
| JP2008200608A (en) * | 2007-02-20 | 2008-09-04 | Tokai Univ | Production method of conductive fluororesin thin film and conductive fluororesin thin film |
| JP2009190940A (en) * | 2008-02-14 | 2009-08-27 | Univ Of Tokyo | Nano-carbon material dispersion, its manufacturing method and nano-carbon material structure |
| EP2246297A4 (en) * | 2008-02-14 | 2013-09-25 | Univ Tokyo | Nanocarbon material dispersion, method for producing the same, and nanocarbon material structure |
| WO2009102023A1 (en) * | 2008-02-14 | 2009-08-20 | The University Of Tokyo | Nanocarbon material dispersion, method for producing the same, and nanocarbon material structure |
| JP2009242144A (en) * | 2008-03-28 | 2009-10-22 | Toray Ind Inc | Production method of carbon nanotube film |
| JP2009242126A (en) * | 2008-03-28 | 2009-10-22 | Nof Corp | Carbon nanotube aqueous dispersion |
| JP2009273235A (en) * | 2008-05-07 | 2009-11-19 | Nikon Corp | Vibrating actuator and optical instrument |
| US8668952B2 (en) | 2008-05-16 | 2014-03-11 | Sumitomo Electric Industries, Ltd. | Carbon wire and nanostructure formed of carbon film and method of producing the same |
| WO2010041750A1 (en) | 2008-10-10 | 2010-04-15 | 保土谷化学工業株式会社 | Aqueous dispersion of carbon microfibers, process for producing the aqueous dispersion, and article produced using same |
| JP2014187048A (en) * | 2009-06-09 | 2014-10-02 | Sivarajan Ramesh | Liquid base nanostructure carbon material (ncm) coating of bipolar plate for fuel cell |
| US9966611B2 (en) | 2009-06-09 | 2018-05-08 | Ramesh Sivarajan | Solution based nanostructured carbon materials (NCM) coatings on bipolar plates in fuel cells |
| US10826078B2 (en) | 2009-06-09 | 2020-11-03 | Ramesh Sivarajan | Solution based nanostructured carbon materials (NCM) coatings on bipolar plates in fuel cells |
| JP2012148970A (en) * | 2012-03-09 | 2012-08-09 | Asahi Kasei Chemicals Corp | Dispersant composition |
| JP2015178102A (en) * | 2014-02-28 | 2015-10-08 | ミヨシ油脂株式会社 | Aqueous dispersion of nanocarbon material in which gemini surfactant is used as dispersant and production method of the same |
| KR20170084050A (en) | 2014-11-14 | 2017-07-19 | 도다 고교 가부시끼가이샤 | Carbon nanotube and method for manufacturing same, and lithium ion secondary battery using carbon nanotube |
| US10570016B2 (en) | 2014-11-14 | 2020-02-25 | Toda Kogyo Corp. | Carbon nanotube and process for producing the carbon nanotube, and lithium ion secondary battery using the carbon nanotube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2003238126A (en) | Hydrophilic dispersion fluid of carbon nanotube and its manufacturing method | |
| Borode et al. | Surfactant-aided dispersion of carbon nanomaterials in aqueous solution | |
| KR100815028B1 (en) | Dispersant for carbon nanotube and composition comprising the same | |
| CA2668489C (en) | Dispersion method | |
| JP4635103B2 (en) | Carbon nanotube dispersion and use thereof | |
| KR102111174B1 (en) | Dispersion comprising carbon nanotubes and graphene platelets | |
| CN108584918A (en) | A kind of method of high efficiency dispersion carbon nanotube | |
| JP2004216516A (en) | Carbon nanotube dispersion liquid and its manufacturing method, and polymer composite and its manufacturing method | |
| Kulkarni et al. | High concentration exfoliation of graphene in ethyl alcohol using block copolymer surfactant and its influence on properties of epoxy nanocomposites | |
| KR102151481B1 (en) | Water-Dispersible Graphene Nanosheets | |
| TW200902191A (en) | Metal particle and fabricating method thereof, and metal particle dispersion solution and fabricating method thereof | |
| TW201714987A (en) | Ink formulation | |
| US20200087149A1 (en) | Method for the synthesis of nanofluids | |
| JP2005263608A (en) | Aqueous dispersant for carbon nanotube | |
| Cui et al. | High-concentration self-cross-linkable graphene dispersion | |
| JP2009196840A (en) | Method for cutting carbon nanotube, carbon nanotube slice and dispersion liquid of carbon nanotube | |
| Huang et al. | Ball-milling exfoliation of hexagonal boron nitride in viscous hydroxyethyl cellulose for producing nanosheet films as thermal interface materials | |
| Chen et al. | Self-Assembly of Ionic Liquids-Stabilized Pt Nanoparticles into Two-Dimensional Patterned Nanostructures at the Air− Water Interface | |
| US20120289613A1 (en) | Emulsions, compositions and devices including graphene oxide, and methods for using same | |
| CN107010614A (en) | Aqueous liquid dispersion of carbon nanomaterial and preparation method thereof | |
| Kang et al. | Synthesis and characterization of polyoxometalate nanowires based on a novel microemulsion process | |
| JP4969074B2 (en) | Method for producing fullerene nanoparticle dispersion | |
| US8551916B2 (en) | Method for preparation of aqueous emulsion using interfacially active organic compound as emulsifying agent | |
| Pavithra et al. | Viscosity and thermal conductivity of ZnO–water-based nanofluids stabilized by grafted SMA-g-MPEG comb-shaped copolymer for heat transfer applications | |
| JP2008200608A (en) | Production method of conductive fluororesin thin film and conductive fluororesin thin film |