JP6714134B1 - カーボンナノチューブ配合凝集物の製造方法 - Google Patents
カーボンナノチューブ配合凝集物の製造方法 Download PDFInfo
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- JP6714134B1 JP6714134B1 JP2019149429A JP2019149429A JP6714134B1 JP 6714134 B1 JP6714134 B1 JP 6714134B1 JP 2019149429 A JP2019149429 A JP 2019149429A JP 2019149429 A JP2019149429 A JP 2019149429A JP 6714134 B1 JP6714134 B1 JP 6714134B1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/168—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F126/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/16—Powdering or granulating by coagulating dispersions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
- C08J3/212—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase and solid additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
- C08J5/241—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres
- C08J5/243—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres using carbon fibres
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/32—Specific surface area
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/36—Diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/14—Water soluble or water swellable polymers, e.g. aqueous gels
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2339/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Derivatives of such polymers
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Abstract
Description
[1](1)0.01〜3.0質量%の濃度を有する水溶性ポリマーの水溶液を準備する工程、
(2)カーボンナノチューブ100質量部に対して、前記水溶性ポリマーの水溶液を400〜1000質量部の割合で前記カーボンナノチューブに含浸させて湿潤凝集物を調製する工程、
(3)前記湿潤凝集物を剪断破砕して破砕物の凝集物を得る工程、および
(4)前記破砕物の凝集物を乾燥する工程、
を含んでなる、カーボンナノチューブ配合凝集物の製造方法。
[2] 工程(1)の湿潤凝集物調製工程が、スクリューコンベアを用いて連続的に実施される、[1]に記載の方法。
[3] 前記湿潤凝集物は、室温における含水量がカーボンナノチューブ100質量部に対して680〜980質量部である、[1]または[2]に記載の方法。
[4] 前記水溶性ポリマーがポリジアリルジメチルアンモニウムクロライドである、[1]〜[3]のいずれか一項に記載の方法。
[5] 工程(2)における剪断破砕処理が、カッターミルを用いて連続的に実施される、[1]〜[4]のいずれか一項に記載の方法。
[6] 前記カッターミルが、多段式カッターミルである、[5]に記載の方法。
[7] 前記破砕物の平均粒径が0.5〜2mmの範囲になるまで、湿潤凝集物の剪断破砕処理を行う、[1]〜[6]のいずれか一項に記載の方法。
[8] 工程(4)の乾燥工程が、熱風乾燥により実施される、[1]〜[7]のいずれか一項に記載の方法。
[9] 前記カーボンナノチューブ配合凝集物の嵩密度が、0.15〜0.30g/cm3である、[1]〜[8]のいずれか一項に記載の方法。
[10] 前記カーボンナノチューブ配合凝集物の平均粒径が、0.5〜2.0mmである、[1]〜[9]のいずれか一項に記載の方法。
[11] 前記カーボンナノチューブ配合凝集物の空隙率が、15〜30%である、[1]〜[10]のいずれか一項に記載の方法。
本発明の一実施形態において、上記工程(1)では、水溶性ポリマーの水溶液を準備する。水溶性ポリマーとしては、CNTを水中で分散安定化し得る限り特に限定されないが、好ましくは4級アンモニウム基等のカチオン性基を主鎖または側鎖に有するポリマーを使用することができる。
で表されるモノマーから選択される。
nは、0〜100の整数である)で表される非アミン系モノマーでもよい。
次いで、カーボンナノチューブ100質量部に対して、前記水溶性ポリマーの水溶液を700〜950質量部の割合で前記カーボンナノチューブに含浸させて湿潤凝集物を調製する。
次いで、上記工程(2)において得られたCNT配合湿潤凝集物を剪断破砕して破砕物の凝集物を得る。破砕物の凝集物は、剪断破砕処理中に湿潤凝集物の破砕物が互いに接触して付着して生成するものであり、飛散性が低く、安全にCNT配合凝集物を整合する上で有利に利用することができる。
本発明の一実施態様によれば、工程(3)で得られた破砕物の凝集物を乾燥してカーボンナノチューブ配合凝集物を得る。
本発明の一実施態様によれば、上記方法により得られたCNT配合凝集物が提供される。一実施態様によれば、CNT配合凝集物の嵩密度は、好ましくは0.1〜0.4g/cm3であり、より好ましくは0.15〜0.3g/cm3であり、さらに好ましくは0.2〜0.25g/cm3である。
図1に記載のCNT配合凝集物製造装置1を用いてCNT配合凝集物を製造した。先ず、CNT500gを主原料用フィーダー2に投入し、水3500gに水溶性ポリマーであるポリジアリルジメチルアンモニウムクロライド重合物(商品名:FPA1000L、センカ株式会社製)4.37gを溶解した水溶性ポリマーの水溶液を分散媒用フィーダー3に投入した。
次に、スクリューミキサー4を作動させて、フィーダー2に投入したCNTを移送しながら、分散媒用フィーダー3から送液ポンプ5により配管を介して水溶性ポリマー水溶液をスクリューミキサー4内に送液した。このようにして、スクリューミキサー4内でCNTに水溶性ポリマーの水溶液を含浸させて、湿潤凝集物(水溶性ポリマー水溶液を含侵させたCNT)を得て、カッターミル6内に連続的に供給した。
続いて、カッターミル6により湿潤凝集物を連続的に剪断破砕処理した。この際、破砕物は自己凝集し、粒状の破砕物の凝集物が生成した。得られた粒状の破砕物の凝集物を、乾燥装置7を用いて熱風乾燥することにより、CNT配合凝集物を得た。
嵩密度は、JIS K 6219に規定されるカーボンブラックの嵩密度の測定法に準拠して求めた。
炭素含有率は、JIS K 6218−2に準拠して測定された灰分(%)を100%から差し引くことにより求めた。
走査型電子顕微鏡(SEM)により、CNT配合凝集物の形態観察を実施した。観察は300倍のSEM画像を用いて、任意に100個のCNT配合凝集物の外径を計測し、その数平均値をもってCNT配合凝集物の平均粒径(mm)とした。
まず、80〜90℃に加熱した有機溶剤キシレンに、非水溶性ポリマーであるポリエチレン(ハイワックス320P、三井化学社製)を溶解し、3重量%のポリエチレンを含む樹脂バインダー溶液を作成した。
なお、キシレンは、大気放散することは禁止されているため、真空系の冷却トラップにて全量を回収した。
また、本発明によれば、CNT配合凝集物を取得する際の加工性・ハンドリング性等の作業性を著しく向上させ、大掛かりな設備を必要とせず製造工程も短縮できる。また、粒度分布も良好なCNT配合凝集物を低原価で量産できることから、工業生産上特に有利である。
2 主原料用フィーダー
3 分散媒用フィーダー
4 スクリューミキサー
5 送液ポンプ
6 カッターミル
7 乾燥装置
Claims (10)
- (1)0.005〜3.0質量%の濃度を有する水溶性ポリマーの水溶液を準備する工程、
(2)カーボンナノチューブ100質量部に対して、前記水溶性ポリマーの水溶液を400〜1000質量部の割合で前記カーボンナノチューブに含浸させて湿潤凝集物を調製する工程、
(3)前記湿潤凝集物を剪断破砕して破砕物の凝集物を得る工程、および
(4)前記破砕物の凝集物を乾燥し、前記水溶性ポリマーを含むカーボンナノチューブ配合凝集物を得る工程、
を含んでなる、カーボンナノチューブ配合凝集物の製造方法。 - 工程(1)の湿潤凝集物調製工程が、スクリューコンベアを用いて連続的に実施される、請求項1に記載の方法。
- 前記湿潤凝集物は、室温における含水量がカーボンナノチューブ100質量部に対して600〜980質量部である、請求項1または2に記載の方法。
- 前記水溶性ポリマーが、ポリジアリルジメチルアンモニウムクロライドである、請求項1〜3のいずれか一項に記載の方法。
- 工程(2)における剪断破砕処理が、カッターミルを用いて連続的に実施される、請求項1〜4のいずれか一項に記載の方法。
- 前記カッターミルが、多段式カッターミルである、請求項5に記載の方法。
- 工程(4)の乾燥工程が、熱風乾燥により実施される、請求項1〜6のいずれか一項に記載の方法。
- 前記カーボンナノチューブ配合凝集物の嵩密度が、0.15〜0.30g/cm3である、請求項1〜7のいずれか一項に記載の方法。
- 前記カーボンナノチューブ配合凝集物の平均粒径が、0.5〜2.0mmである、請求項1〜8のいずれか一項に記載の方法。
- 前記カーボンナノチューブ配合凝集物の空隙率が、15〜30%である、請求項1〜9のいずれか一項に記載の方法。
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CN202080057833.5A CN114651033B (zh) | 2019-08-16 | 2020-08-13 | 碳纳米管配合凝集物的制造方法 |
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US17/635,463 US20220315730A1 (en) | 2019-08-16 | 2020-08-13 | Method for manufacturing carbon nanotube-blended aggregate |
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