JP2022548274A - フィブリル化繊維およびその製造方法 - Google Patents
フィブリル化繊維およびその製造方法 Download PDFInfo
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- JP2022548274A JP2022548274A JP2022516710A JP2022516710A JP2022548274A JP 2022548274 A JP2022548274 A JP 2022548274A JP 2022516710 A JP2022516710 A JP 2022516710A JP 2022516710 A JP2022516710 A JP 2022516710A JP 2022548274 A JP2022548274 A JP 2022548274A
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Abstract
Description
本出願は、2020年5月29日付の韓国特許出願第10-2020-0065204号、2020年7月13日付の韓国特許出願第10-2020-0086346号、2021年5月31日付の韓国特許出願第10-2021-0069785号、2021年5月31日付の韓国特許出願第10-2021-0069786号、および2021年5月31日付の韓国特許出願第10-2021-0069787号に基づく優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として含まれる。
本発明の一実施形態によれば、
マイクロ繊維、微細粒子前駆体および溶媒を含む混合物を準備する段階と、
前記マイクロ繊維上に前記微細粒子前駆体から微細粒子を成長させて前記マイクロ繊維をフィブリル化する段階と、
前記微細粒子の成長によってフィブリル化されたマイクロ繊維にせん断力を加えて、前記マイクロ繊維を微細化する段階と、を含む、フィブリル化繊維の製造方法が提供される。
本発明の他の実施形態によれば、
ナノフィブリルおよび微細粒子を含むマイクロセルロース繊維を含む、フィブリル化繊維が提供される。
セルロース原料として針葉樹クラフトパルプ繊維を準備した。そして、走査電子顕微鏡を用いて前記パルプ繊維の形状を観察した(図2のSEMイメージ)。
蒸留水1000gに酢酸亜鉛20gを溶解させた水溶液に前記実施例1と同様のパルプ繊維20gを添加し、500rpmで2時間攪拌して混合物を準備した。前記混合物で膨潤されたパルプ繊維上には酢酸亜鉛が水素結合またはイオン結合により付着した。
蒸留水200gおよびエタノール800gを混合した混合溶媒にテトラエチルオルトシリケート(TEOS)10gを溶解させた水溶液に実施例1と同様のパルプ繊維20gを添加し、500rpmで2時間攪拌して混合物を準備した。前記混合物で膨潤されたパルプ繊維にテトラエチルオルトシリケートが水素結合またはイオン結合により付着した。
前記実施例2でフィブリル化されたパルプ繊維に1-オクタデカンチオール(1-octadecanethiol)1gを添加してパルプ繊維を親油性に改質した後、微細化工程を行ったことを除いて、実施例2と同様の方法でフィブリル化繊維を製造した。
セルロース原料として前記実施例1と同様の針葉樹クラフトパルプ繊維を準備した。前記パルプ繊維上に微細粒子を成長させない状態で二軸押出機に投入して押出したことを除いて、実施例1と同様の方法でセルロース繊維を製造した。
セルロース原料として前記実施例1と同様の針葉樹クラフトパルプ繊維を準備した。2,2,6,6-テトラメチルピペリジニル-1-オキシラジカル(TEMPO)を触媒として用いて前記パルプ繊維の表面を酸化して、酸化パルプを得た。
実施例および比較例で製造された繊維の物性を次の方法で評価し、その結果を下記表1に記載した。
走査電子顕微鏡を用いて繊維の短軸径(繊維の断面で最も短い直径)を測定した。
走査電子顕微鏡を用いて各サンプル当たりの微細粒子20個の短軸径を測定して最大値および最小値を除いた範囲で表した。
抗菌性実験規格のKS K 0693を繊維の抗菌性評価に適合するように変形して抗菌性を評価した。具体的には、50mLコニカルチューブに細かく切断した試料0.4gに106CFU濃度の菌4mL(1XPBS 4mL、OD 600nm=1値の菌40μL)を添加した。対照試験片は、比較例1の繊維0.4gを入れて準備した。菌株はグラム陰性菌で大腸菌(Escherichia coli)を使用した。準備されたサンプルを振とうインキュベーター(shaking incubator)を用いて36±1℃で24時間懸濁培養した。菌培養の終わった試料に1XPBS 16mLを添加して5倍希釈した後、1時間ボルテックス(vortexing)した。ボルテックスが完了したら100μLずつ寒天培地(固形培地)に接種した後、スプレッダーまたはガラス玉を用いて培地に吸収されるまで塗抹した。固形培地を36±1℃で24時間静置培養した。それぞれのペトリディッシュのコロニーを数えて記録した。その後、対照試験片に対して抗菌試料のコロニー数が何パーセント減少したかを計算して静菌率を求めた。
5~10ppmの酢酸、アンモニア、アセトアルデヒドおよびホルムアルデヒドガスそれぞれを標準ガス発生器(standard gas generator)を用いて実施例1のサンプル50mgが入ったガラス管に150mL/minの速度で総10L流し、サンプルを通過した後、ガス(gas)濃度をシフトマス(shift mass)装置(SYFT Technologies、VOICE200 ultra)を用いてリアルタイムで定量分析した。そして、サンプルに供給したガスに対して実施例1のサンプルによって除去されたガスの比率を計算して表2に示す。
11:ナノフィブリル
20:微細粒子
Claims (15)
- マイクロ繊維、微細粒子前駆体および溶媒を含む混合物を準備する段階と、
前記マイクロ繊維上に前記微細粒子前駆体から微細粒子を成長させて前記マイクロ繊維をフィブリル化する段階と、
前記微細粒子の成長によってフィブリル化されたマイクロ繊維にせん断力を加えて前記マイクロ繊維を微細化する段階とを含む、フィブリル化繊維の製造方法。 - 前記マイクロ繊維は、パルプ形態のマイクロ繊維集合体である、請求項1に記載のフィブリル化繊維の製造方法。
- 前記マイクロ繊維はセルロース繊維である、請求項1又は2に記載のフィブリル化繊維の製造方法。
- 前記微細粒子前駆体は、銅、亜鉛、カルシウム、アルミニウム、鉄、白金、パラジウム、ルテニウム、イリジウム、ロジウム、オスミウム、クロム、コバルト、ニッケル、マンガン、バナジウム、モリブデンおよびガリウムからなる群から選択される1種以上の金属の酢酸塩、塩化塩もしくは硝酸塩;または酸化シリコン前駆体を含む、請求項1から3のいずれか一項に記載のフィブリル化繊維の製造方法。
- 前記溶媒は、水、アルコール、ジメチルスルホキシド、水酸化ナトリウム水溶液、アンモニア水溶液、尿素水溶液、またはこれらの混合物である、請求項1から4のいずれか一項に記載のフィブリル化繊維の製造方法。
- 前記混合物は、
100重量部の前記マイクロ繊維に対して、
10重量部~150重量部の前記微細粒子前駆体および
1000重量部~10000重量部の前記溶媒を含む、請求項1から5のいずれか一項に記載のフィブリル化繊維の製造方法。 - 前記マイクロ繊維をフィブリル化する段階では、前記混合物に還元剤、触媒、リガンドまたはこれらの混合物を添加して前記微細粒子前駆体から前記マイクロ繊維上に微細粒子を成長させる、請求項1から6のいずれか一項に記載のフィブリル化繊維の製造方法。
- 前記マイクロ繊維をフィブリル化する段階で、前記微細粒子前駆体から前記マイクロ繊維上に成長した微細粒子は0.01μm~10μmの短軸径を有する、請求項1から7のいずれか一項に記載のフィブリル化繊維の製造方法。
- 前記微細粒子の成長によってフィブリル化されたマイクロ繊維は、ナノフィブリルおよび微細粒子を含むマイクロセルロース繊維を含む、請求項1から8のいずれか一項に記載のフィブリル化繊維の製造方法。
- 前記ナノフィブリルは、前記マイクロセルロース繊維の表面に結合し、
前記微細粒子は、前記ナノフィブリルと結合するか、または前記マイクロセルロース繊維の表面または内部に結合する、請求項9に記載のフィブリル化繊維の製造方法。 - 前記マイクロセルロース繊維は1μm~30μmの短軸径を有し、
前記ナノフィブリルは10nm~400nmの短軸径を有する、請求項9又は10に記載のフィブリル化繊維の製造方法。 - 前記マイクロ繊維上に前記微細粒子を成長させた後、チオール基を有する親油性化合物を添加して前記微細粒子を改質する段階をさらに含む、請求項1から11のいずれか一項に記載のフィブリル化繊維の製造方法。
- ナノフィブリルおよび微細粒子を含むマイクロセルロース繊維を含む、フィブリル化繊維。
- 前記ナノフィブリルは、前記マイクロセルロース繊維の表面に結合し、
前記微細粒子は、前記ナノフィブリルと結合するか、または前記マイクロセルロース繊維の表面または内部に結合する、請求項13に記載のフィブリル化繊維。 - 前記マイクロセルロース繊維は1μm~30μmの短軸径を有し、
前記ナノフィブリルは10nm~400nmの短軸径を有する、請求項13又は14に記載のフィブリル化繊維。
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JP2014055323A (ja) * | 2012-09-12 | 2014-03-27 | Toppan Printing Co Ltd | 金属/セルロース複合化微細繊維、その製造方法、ならびに金属/セルロース複合化微細繊維を含む透明導電膜 |
WO2015170613A1 (ja) * | 2014-05-09 | 2015-11-12 | 凸版印刷株式会社 | 複合体、複合体の製造方法、分散液、分散液の製造方法および光学材料 |
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