JP2019210558A - 電界紡糸装置 - Google Patents
電界紡糸装置 Download PDFInfo
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- JP2019210558A JP2019210558A JP2018105380A JP2018105380A JP2019210558A JP 2019210558 A JP2019210558 A JP 2019210558A JP 2018105380 A JP2018105380 A JP 2018105380A JP 2018105380 A JP2018105380 A JP 2018105380A JP 2019210558 A JP2019210558 A JP 2019210558A
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- nozzle
- electrode
- raw material
- columnar support
- electrospinning apparatus
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Abstract
Description
前記ノズルを囲む電極、及び該電極における前記ノズルに臨む面を覆う電気絶縁性の被覆絶縁部を備える電極ユニットと、
前記ノズルと前記電極との間に電圧を発生させる電圧発生部とを有する電界紡糸装置であって、
前記柱状支持部は、その表面の一部に導電性部位を備え、
前記電極ユニットの前記被覆絶縁部と前記柱状支持部の前記導電性部位との間が、空隙を介して、該柱状支持部の全周にわたって隔絶されている、電界紡糸装置を提供するものである。
また原料液に繊維形成の可能な高分子化合物が溶媒に溶解又は分散した溶液を用いる場合は噴射孔71から噴出される気体として、常温の気体を用いることが好ましい。気体としては、利便性の観点から例えば空気を用いることができる。同様の観点から、気体の流量は1L/min以上500L/min以下であることが好ましく、10L/min以上100L/min以下であることがより好ましい。
図1及び図2に示す電界紡糸装置1を用意した。原料噴射部と筒状絶縁部とを隔絶する空隙の幅を以下の表1に示すとおりに設定した。ノズルの延びる方向が鉛直下向きになるように装置全体を配置し、帯電量測定のためのモデル実験を行った。ノズル21に5kVの直流電圧を直流高圧電源により印加した。シリンダポンプを用いて、原料噴射部に1.0g/minの流量で超純水を供給し、同じ速度で、ノズルの先端部から水を滴下させた。重力によって略鉛直下方に滴下した水滴を、ファラデーケージ(春日電機株式会社製、KQ1400)内に配置した金属容器に受けた。原料噴射部のノズルの先端部から1分間、超純水を滴下させ、金属容器内に溜まった水の電荷量(nC/g)を、クーロンメータ(春日電機株式会社製 NK−1002)により計測した。原料噴射部のノズルの先端から金属容器の縁までの距離は250mmであった。金属容器はステンレス製のものを用いた。気体噴射部からの気体の噴射は行わなかった。測定環境は22℃、30%RHであった。得られた結果を表1に示す。
2 原料噴射部
21 ノズル
20 柱状支持部
21b キャップ部
22 接続コネクタ
23 パイプ
110 電極ユニット
3 電極
4 電圧発生部
5 壁部
5a 被覆絶縁部
5b 筒状絶縁部
5c 第2被覆絶縁部
6 空隙
7 気体噴射部
Claims (8)
- 原料液を噴射する導電性のノズル及び該ノズルを支持するとともに内部に該ノズルへ原料液を供給する供給路を有する柱状支持部を備える原料噴射部と、
前記ノズルを囲む電極、及び該電極における前記ノズルに臨む面を覆う電気絶縁性の被覆絶縁部を備える電極ユニットと、
前記ノズルと前記電極との間に電圧を発生させる電圧発生部とを有する電界紡糸装置であって、
前記柱状支持部は、その表面の一部に導電性部位を備え、
前記電極ユニットの前記被覆絶縁部と前記柱状支持部の前記導電性部位との間が、空隙を介して、該柱状支持部の全周にわたって隔絶されている、電界紡糸装置。 - 前記柱状支持部は、その全長にわたって、前記電極ユニットの前記被覆絶縁部と隔絶されている請求項1に記載の電界紡糸装置。
- 前記原料噴射部と電極ユニットとがそれぞれ独立にベース部材に支持されている請求項1又は2に記載の電界紡糸装置。
- 前記柱状支持部が、パイプと、該パイプの一端を閉塞するキャップ部と、該パイプの他端を閉塞する接続コネクタとを備え、
前記キャップ部は導電性であり、且つ前記ノズルを支持し、
前記接続コネクタは導電性であり、且つ前記原料液の供給管と接続可能になっており、
前記パイプは、電気絶縁性のパイプ本体、及び該パイプ本体の内部に配された、前記ノズルと前記接続コネクタとを電気的に接続する導電部材を備え、
前記キャップ部、前記パイプ及び前記接続コネクタが連通して前記原料液の供給路を形成している請求項1ないし3のいずれか一項に記載の電界紡糸装置。 - 前記空隙はその幅が1mm以上である請求項1ないし4のいずれか一項に記載の電界紡糸装置。
- 前記電極ユニットが、前記被覆絶縁部と前記柱状支持部との間に配置され、且つ該被覆絶縁部に連設されている電気絶縁性の筒状絶縁部を更に備え、
前記筒状絶縁部と前記柱状支持部の前記導電性部位との間が、前記空隙を介して、該柱状支持部の全周にわたって隔絶されている請求項1ないし5のいずれか一項に記載の電界紡糸装置。 - 前記筒状絶縁部の先端は前記ノズルの先端よりも後方に位置しており、
前記筒状絶縁部の先端に、前記原料液の噴射方向と同方向に気体の噴射可能な噴射孔が形成されている請求項6に記載の電界紡糸装置。 - 前記電極における前記ノズルに臨む面が凹曲面状である請求項1ないし7のいずれか一項に記載の電界紡糸装置。
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