JP6967802B2 - 金属ナノ粒子を含む繊維の製造方法 - Google Patents
金属ナノ粒子を含む繊維の製造方法 Download PDFInfo
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- JP6967802B2 JP6967802B2 JP2020077394A JP2020077394A JP6967802B2 JP 6967802 B2 JP6967802 B2 JP 6967802B2 JP 2020077394 A JP2020077394 A JP 2020077394A JP 2020077394 A JP2020077394 A JP 2020077394A JP 6967802 B2 JP6967802 B2 JP 6967802B2
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- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
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Description
1.誘導結合プラズマ発光分析(ICP−OES):Agilent Technologies社製のAgilent 5100、および
2.走査型電子顕微鏡(SEM):日立製作所社製のS−3000N
布A〜布Iを、以下に記載される試験方法により順次分析した。特性分析の実験的有意性を保証するために、布A〜布Iをそれぞれ同じ試験方法により分析した。したがって、布A〜布Iの各々の特性の違いは、主として各布の金属ナノ粒子を含む繊維の違いに起因するものと理解することができる。
図1A〜図6Aは、実施例1〜実施例5から得られた布A〜布E、そして実施例7から得られた布Gの順番のSEM画像である。図1Aは1500倍の倍率で撮影され、図2A〜図4Aはそれぞれ5000倍の倍率で撮影され、図5Aは3000倍の倍率で撮影され、図6Aは2000倍の倍率で撮影された。図1A〜図6Aに示されるように、金属ナノ粒子は繊維表面に均一に付着していた。さらに、布A〜布Eおよび布Gに含まれる金属ナノ粒子を含む繊維上の金属ナノ粒子の粒子サイズを測定し、平均粒子サイズを表1に列記した。
布A〜布Iの各々を4cm2の面積を有する試料に切断した。次に、各試料をそこに含まれる金属ナノ粒子の種類に基づく適切な条件で溶解させた。次いで、各試料をICP−OESによる元素分析にかけることにより、金属ナノ粒子の種類の濃度が得られた。
標準法JISZ 2801に従って、布A〜布Iの各々を抗細菌性試験に供した。その試験は、主に細菌培養の実施前後の細菌数の差に基づき抗細菌率を計算する定量分析であった。この試験で使用された試験菌株は、スタフィロコッカス・アウレウスBCRC10451であった。実施例1、実施例3〜実施例9の布A、布C〜布Iの評価時点は、インキュベートの24時間後であり、さらに、実施例2の布Bの評価時点は、インキュベートの6時間後であった。実施例1〜9の抗細菌率を表3に列記した。
標準法AATCC 135の洗濯堅牢度に従って、布A〜布Iの各々を20回繰り返し洗濯した。布A〜布Iの全ての試験結果は「合格」であった。
実施例1〜実施例9の実験結果に基づいて、本開示の金属ナノ粒子を含む繊維の製造方法は、高価な装置を一切用いずに室温環境において実施することができることが裏付けられる。本開示は、費用効率が良く、エネルギー消費が少なく、熱汚染が低く、環境に優しく、安全であるという利点を有することが分かる。
Claims (14)
- 金属ナノ粒子を含む繊維の製造方法であって、
工程(A):繊維、および、第1の金属イオンを含む金属塩水溶液を準備する工程と、
工程(B):前記金属塩水溶液を前記繊維と接触させることにより、前記第1の金属イオンを含む繊維を形成させる工程と、
工程(c1−1):前記第1の金属イオンを含む繊維を前記第2の金属と接触させ、前記第1の金属イオンの還元反応を行うことで、第2の金属イオンと、未反応の第2の金属と、前記繊維上に第1の金属ナノ粒子とを有する混合物を生成させる工程と、
工程(c1−2):水で洗浄することにより、前記混合物から前記未反応の第2の金属および前記第2の金属イオンを除去することで、前記第1の金属ナノ粒子を含む第1の複合繊維を得る工程と、
工程(c2):前記第1の複合繊維を0.1時間〜72時間にわたり静置することで、金属ナノ粒子を含む繊維を得る工程と
を含み、
前記金属ナノ粒子を含む繊維は、前記第1の金属イオンが還元したことに由来する第1の金属ナノ粒子を含むものであり、
前記第1の金属イオンの標準還元電位は、前記第2の金属のイオン状態の標準還元電位より大きく、これらの標準還元電位の間の差は0.4ボルトから4.0ボルトの範囲である、金属ナノ粒子を含む繊維の製造方法。 - 前記第1の金属イオンは、金イオン、白金イオン、銀イオン、銅イオン、鉄イオン、亜鉛イオンまたはチタンイオンを含む、請求項1に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記金属塩水溶液の第1の金属イオンの濃度は、1μg/Lから90g/Lの範囲である、請求項1または2に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記第2の金属は、マグネシウム金属、アルミニウム金属、マンガン金属、チタン金属、亜鉛金属、鉄金属、ニッケル金属、スズ金属、銅金属または銀金属を含む、請求項1から3のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記金属塩水溶液を繊維と接触させる工程は、浸漬法、被覆法、吹き付け法または自動ロール引き上げ法により行われる、請求項1から4のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記繊維を、浸漬法により0.1秒間から24時間の範囲の接触時間にわたり前記金属塩水溶液と接触させる、請求項5に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記還元反応の反応時間は、0.1秒間から24時間の範囲である、請求項1から6のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。
- 工程(c2)の温度は、0℃から120℃の範囲である、
請求項1から7のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。 - 前記第1の金属ナノ粒子の平均サイズは、1nmから100nmの範囲である、請求項1から8のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記金属ナノ粒子を含む繊維の表面上での前記第1の金属ナノ粒子の含有量は、1平方センチメートル当たり10μgから100mgの範囲である、請求項1から9のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。
- 工程(c2)は、
工程(c2‐a):前記第1の複合繊維を0.1時間〜72時間にわたり静置する工程と、
工程(c2−b):第3の金属イオンを含む金属塩水溶液を前記第1の複合繊維と接触させることで、前記第1の金属イオンとは異なる前記第3の金属イオンを含む第2の複合繊維を形成する工程と、
工程(c2−c):前記第2の複合繊維を第4の金属と接触させ、前記第3の金属イオンの還元反応を行うことで、前記第1の金属ナノ粒子と前記第3の金属イオンの還元に由来する第3の金属ナノ粒子とを含む、金属ナノ粒子を含む繊維を得る工程と、
を含み、前記第3の金属イオンの標準還元電位は、前記第4の金属のイオン状態の標準還元電位より大きく、これらの標準還元電位の間の差は0.4ボルトから4.0ボルトの範囲であり、前記第1の金属イオンの標準還元電位は、前記第4の金属のイオン状態の標準還元電位より大きい、請求項1から10のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。 - 前記第1の金属イオンの標準還元電位は、前記第3の金属イオンの標準還元電位より大きい、請求項11に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記第4の金属は、前記第2の金属と同じである、請求項11または12に記載の金属ナノ粒子を含む繊維の製造方法。
- 前記第3の金属ナノ粒子の平均サイズは、1nmから100nmの範囲である、請求項11から13のいずれか一項に記載の金属ナノ粒子を含む繊維の製造方法。
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