JP2013536323A - ポリイミド多孔性ウェブ、その製造方法、及びそれを含む電解質膜 - Google Patents
ポリイミド多孔性ウェブ、その製造方法、及びそれを含む電解質膜 Download PDFInfo
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- 239000004642 Polyimide Substances 0.000 title claims abstract description 78
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- 239000000463 material Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
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- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
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- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
- H01M8/1018—Polymeric electrolyte materials
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- H01M8/1081—Polymeric electrolyte materials characterised by the manufacturing processes starting from solutions, dispersions or slurries exclusively of polymers
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- B01D71/58—Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
- B01D71/62—Polycondensates having nitrogen-containing heterocyclic rings in the main chain
- B01D71/64—Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
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- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
- B29C48/142—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration using force fields, e.g. gravity or electrical fields
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
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Abstract
【選択図】図1
Description
Claims (11)
- 60〜99%の多孔度(porosity)を有し、
多孔性ウェブの全体空隙の80%以上が、前記多孔性ウェブの平均孔径との差が1.5μm以下である孔径を有することを特徴とする、ポリイミド多孔性ウェブ。 - 前記平均孔径は、0.05〜3.0μmであることを特徴とする、請求項1に記載のポリイミド多孔性ウェブ。
- 前記多孔性ウェブは、40〜5,000nmの平均直径を有する繊維を含むことを特徴とする、請求項1に記載のポリイミド多孔性ウェブ。
- 前記多孔性ウェブは、20〜200℃の温度範囲で熱的安全性があることを特徴とする、請求項1に記載のポリイミド多孔性ウェブ。
(ここで、前記熱的安全性は、示差走査熱量計(DSC、Differential Scanning Calorimetry)を使用して、温度範囲20〜200℃、昇温速度20℃/分の条件で2nd run測定の際に、特定ピークが全く現れないとき、熱的安全性があると判断する。) - 前記多孔性ウェブは、15MPa以上の引張強度を有することを特徴とする、請求項1に記載のポリイミド多孔性ウェブ。
- ポリイミド前駆体(precursor)を有機溶媒に溶かして紡糸溶液を製造する工程と、
前記紡糸溶液を750〜3,500V/cmの電場下で電気紡糸し、40〜5,000nmの平均直径を有する繊維からなるポリイミド前駆体多孔性ウェブを製造する工程と、
前記ポリイミド前駆体多孔性ウェブをイミド化させてポリイミド多孔性ウェブを製造する工程と、を含むポリイミド多孔性ウェブの製造方法。 - 前記ポリイミド多孔性ウェブは、90%以上のイミド化率を有することを特徴とする、請求項6に記載のポリイミド多孔性ウェブの製造方法。
- 前記紡糸溶液内の前記ポリイミド前駆体は、5〜20重量%の濃度を有することを特徴とする、請求項6に記載のポリイミド多孔性ウェブの製造方法。
- 前記紡糸溶液は、20,000〜100,000cPs(Brookfiel dviscometer、25℃測定時)の粘度を有することを特徴とする、請求項6に記載のポリイミド多孔性ウェブの製造方法。
- 60〜99%の多孔度(porosity)を有し、平均孔径との差が1.5μm以下である孔径を有する空隙の個数が全体空隙の個数の80%以上であるポリイミド多孔性ウェブと、
前記ポリイミド多孔性ウェブに含浸されたイオン伝導体と、を含み、
下記式1によって定義される体積変化率が15%以下であることを特徴とする、電解質膜。
式1:体積変化率(%)=[(Va−Vb)/Vb]×100
(ここで、Vaは、80℃の温度及び90%の相対湿度の条件下で、4時間高湿処理した後の前記電解質膜の体積であり、前記Vbは、前記高湿処理前の前記電解質膜の体積である。) - 60〜99%の多孔度(porosity)を有し、平均孔径との差が1.5μm以下である孔径を有する空隙の個数が全体空隙の個数の80%以上であるポリイミド多孔性ウェブと、
前記ポリイミド多孔性ウェブに含浸されたイオン伝導体と、を含み、
下記式2によって定義される厚さ変化率が8%以下であることを特徴とする、電解質膜。
式2:厚さ変化率(%)=[(Ta−Tb)/Tb]×100
(ここで、Taは、80℃の温度及び90%の相対湿度の条件下で、4時間高湿処理した後の前記電解質膜の厚さであり、前記Tbは、前記高湿処理前の前記電解質膜の厚さである。)
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