JP2021057560A5 - - Google Patents
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- JP2021057560A5 JP2021057560A5 JP2019182392A JP2019182392A JP2021057560A5 JP 2021057560 A5 JP2021057560 A5 JP 2021057560A5 JP 2019182392 A JP2019182392 A JP 2019182392A JP 2019182392 A JP2019182392 A JP 2019182392A JP 2021057560 A5 JP2021057560 A5 JP 2021057560A5
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- Prior art keywords
- shielding sheet
- carbon nanotube
- aqueous dispersion
- sheet according
- ratio
- Prior art date
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- 239000002041 carbon nanotube Substances 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 28
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 19
- 239000006185 dispersion Substances 0.000 claims description 18
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 13
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 13
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 229920003123 carboxymethyl cellulose sodium Polymers 0.000 description 6
- 229940063834 carboxymethylcellulose sodium Drugs 0.000 description 6
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Description
本発明に係る電磁波シールドシートの製造方法の一態様は、
カーボンナノチューブと、カルボキシメチルセルロースナトリウムと、水と、を含むカーボンナノチューブ水分散液を作製する工程と、
前記カーボンナノチューブ水分散液を乾燥させる工程と、
を含み、
前記カーボンナノチューブ水分散液を作製する工程では、分散剤として前記カルボキシメチルセルロースナトリウムのみを用い、
前記カーボンナノチューブ水分散液において、前記カーボンナノチューブの質量に対する前記カルボキシメチルセルロースナトリウムの質量の比は、３以下である。
One aspect of the method for producing an electromagnetic shielding sheet according to the present invention is
a step of preparing a carbon nanotube aqueous dispersion containing carbon nanotubes, sodium carboxymethylcellulose, and water;
a step of drying the carbon nanotube aqueous dispersion;
including
In the step of preparing the carbon nanotube aqueous dispersion, only the sodium carboxymethylcellulose is used as a dispersant,
In the carbon nanotube aqueous dispersion, the ratio of the mass of the sodium carboxymethylcellulose to the mass of the carbon nanotubes is 3 or less.
前記電磁波シールドシートの製造方法のいずれかの態様において、
前記カーボンナノチューブ水分散液を作製する工程は、
前記カーボンナノチューブと、前記カルボキシメチルセルロースナトリウムと、前記水と、を混合して混合液を作製する工程と、
水中対向衝突法によって、前記混合液に含まれる前記カーボンナノチューブを分散させる工程と、
を含んでもよい。
In any aspect of the method for manufacturing the electromagnetic wave shield sheet,
The step of preparing the carbon nanotube aqueous dispersion is
a step of mixing the carbon nanotubes, the sodium carboxymethylcellulose, and the water to prepare a mixture;
a step of dispersing the carbon nanotubes contained in the mixed liquid by an underwater facing collision method;
may include
本発明に係る電磁波シールドシートの一態様は、
カーボンナノチューブと、カルボキシメチルセルロースナトリウムと、から実質的に構成され、
前記カーボンナノチューブの質量に対する前記カルボキシメチルセルロースナトリウムの質量の比は、３以下である。
One aspect of the electromagnetic wave shield sheet according to the present invention is
substantially composed of carbon nanotubes and sodium carboxymethyl cellulose,
The ratio of the mass of the sodium carboxymethylcellulose to the mass of the carbon nanotubes is 3 or less.
本実施形態に係る電磁波シールドシートの製造方法は、カーボンナノチューブ（以下、「ＣＮＴ」ともいう）と、カルボキシメチルセルロースナトリウム（以下、「ＣＭＣ」ともいう）と、水と、を含むＣＮＴ水分散液を作製するＣＮＴ水分散液作製工程を含む。ＣＮＴ水分散液作製工程は、図１に示すように、ＣＮＴと、ＣＭＣと、水と、を混合して混合液を作製する混合液作製工程（ステップＳ１）と、水中対向衝突法によって、混合液に含まれるＣＮＴを分散させるＣＮＴ分散工程（ステップＳ２）と、を含む。さらに、本実施形態に係る電磁波シールドシートの製造方法は、ＣＮＴ水分散液を乾燥させる乾燥工程（ステップＳ３）を含む。以下、本実施形態に係る電磁波シールドシートの製造方法の各工程について、順に説明する。 The method for producing an electromagnetic wave shielding sheet according to the present embodiment comprises a CNT aqueous dispersion containing carbon nanotubes (hereinafter also referred to as "CNT"), carboxymethyl cellulose sodium (hereinafter also referred to as "CMC"), and water. It includes a CNT aqueous dispersion preparation step to be prepared. As shown in FIG. 1, the CNT aqueous dispersion preparation step includes a mixed solution preparation step (step S1) of mixing CNTs, CMC, and water to prepare a mixed solution, and mixing by an underwater facing collision method. and a CNT dispersing step (step S2) of dispersing the CNTs contained in the liquid. Furthermore, the method for manufacturing an electromagnetic shielding sheet according to this embodiment includes a drying step (step S3) for drying the aqueous CNT dispersion. Hereinafter, each step of the method for manufacturing the electromagnetic wave shield sheet according to this embodiment will be described in order.
１．１．２． カルボキシメチルセルロースナトリウム（ＣＭＣ）
混合液作製工程では、分散剤としてＣＭＣのみを用いる。ここで、「分散剤」とは、ＣＮＴを水に分散させて、ＣＮＴ水分散液の低粘度化、およびＣＮＴの凝集・沈降防止に寄与する添加剤のことをいう。
1.1.2. Carboxymethylcellulose sodium (CMC)
Only CMC is used as a dispersing agent in the mixed liquid preparation process. Here, the term "dispersant" refers to an additive that disperses CNTs in water and contributes to lowering the viscosity of the aqueous CNT dispersion and preventing aggregation and sedimentation of CNTs.
Claims (8)
前記カーボンナノチューブ水分散液を乾燥させる工程と、
を含み、
前記カーボンナノチューブ水分散液を作製する工程では、分散剤として前記カルボキシメチルセルロースナトリウムのみを用い、
前記カーボンナノチューブ水分散液において、前記カーボンナノチューブの質量に対する前記カルボキシメチルセルロースナトリウムの質量の比は、３以下である、電磁波シールドシートの製造方法。 a step of preparing a carbon nanotube aqueous dispersion containing carbon nanotubes, sodium carboxymethylcellulose, and water;
a step of drying the carbon nanotube aqueous dispersion;
including
In the step of preparing the carbon nanotube aqueous dispersion, only the sodium carboxymethylcellulose is used as a dispersant,
A method for producing an electromagnetic wave shielding sheet, wherein the ratio of the mass of the sodium carboxymethylcellulose to the mass of the carbon nanotubes in the carbon nanotube aqueous dispersion is 3 or less.
前記カーボンナノチューブと、前記カルボキシメチルセルロースナトリウムと、前記水と、を混合して混合液を作製する工程と、
水中対向衝突法によって、前記混合液に含まれる前記カーボンナノチューブを分散させる工程と、
を含む、請求項１ないし３のいずれか１項に記載の電磁波シールドシートの製造方法。 The step of preparing the carbon nanotube aqueous dispersion is
a step of mixing the carbon nanotubes, the sodium carboxymethylcellulose, and the water to prepare a mixture;
a step of dispersing the carbon nanotubes contained in the mixed liquid by an underwater facing collision method;
The method for producing an electromagnetic shielding sheet according to any one of claims 1 to 3, comprising
前記カーボンナノチューブの質量に対する前記カルボキシメチルセルロースナトリウムの質量の比は、３以下である、電磁波シールドシート。 substantially composed of carbon nanotubes and sodium carboxymethyl cellulose,
The electromagnetic wave shielding sheet, wherein the ratio of the mass of the sodium carboxymethylcellulose to the mass of the carbon nanotube is 3 or less.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019182392A JP7402651B2 (en) | 2019-10-02 | 2019-10-02 | Electromagnetic shield sheet |
| JP2023207461A JP7540067B2 (en) | 2019-10-02 | 2023-12-08 | Manufacturing method of electromagnetic wave shielding sheet, and electromagnetic wave shielding sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019182392A JP7402651B2 (en) | 2019-10-02 | 2019-10-02 | Electromagnetic shield sheet |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023207461A Division JP7540067B2 (en) | 2019-10-02 | 2023-12-08 | Manufacturing method of electromagnetic wave shielding sheet, and electromagnetic wave shielding sheet |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2021057560A JP2021057560A (en) | 2021-04-08 |
| JP2021057560A5 true JP2021057560A5 (en) | 2023-02-07 |
| JP7402651B2 JP7402651B2 (en) | 2023-12-21 |
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| JP2019182392A Active JP7402651B2 (en) | 2019-10-02 | 2019-10-02 | Electromagnetic shield sheet |
| JP2023207461A Active JP7540067B2 (en) | 2019-10-02 | 2023-12-08 | Manufacturing method of electromagnetic wave shielding sheet, and electromagnetic wave shielding sheet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20240055613A1 (en) * | 2020-12-23 | 2024-02-15 | Panasonic Intellectual Property Management Co., Ltd. | Electrode slurry carbon nanotube liquid dispersion, negative electrode slurry, non-aqueous electrolyte secondary battery, and method for producing electrode slurry carbon nanotube liquid dispersion |
| CN113698639A (en) * | 2021-08-30 | 2021-11-26 | 武汉纺织大学 | Carbon nano tube composite material electromagnetic shielding film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007335680A (en) | 2006-06-15 | 2007-12-27 | Sekisui Plastics Co Ltd | Radio wave absorber |
| JP6079138B2 (en) * | 2012-02-23 | 2017-02-15 | 東レ株式会社 | Carbon nanotube dispersion |
| JP2016117639A (en) * | 2014-12-22 | 2016-06-30 | Ｋｊ特殊紙株式会社 | Method for producing aqueous dispersion of graphene nanoplatelet |
| JP2016168809A (en) * | 2015-03-16 | 2016-09-23 | 東レ株式会社 | Conductive laminate |
| JP2016173930A (en) | 2015-03-17 | 2016-09-29 | 日東電工株式会社 | Method for producing conductive material |
| JP2016204203A (en) * | 2015-04-23 | 2016-12-08 | 東レ株式会社 | Dispersion of carbon nanotube-containing composition and conductive molded body |
| PL3348582T3 (en) | 2015-09-09 | 2021-10-25 | Lg Chem, Ltd. | Carbon nanotube dispersion liquid and manufacturing method thereof |
| JP2017065964A (en) * | 2015-09-30 | 2017-04-06 | 東レ株式会社 | Dispersion liquid containing carbon nanotube and conductive laminate using the same |
| JP2017174666A (en) * | 2016-03-24 | 2017-09-28 | 東レフィルム加工株式会社 | Conductive laminate |
| JP7193212B2 (en) * | 2016-05-18 | 2022-12-20 | 戸田工業株式会社 | CARBON NANOTUBES, MANUFACTURING METHOD THEREOF, AND CARBON NANOTUBE DISPERSION |
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