JP4252072B2 - 高分子膜とその製造方法及び燃料電池 - Google Patents
高分子膜とその製造方法及び燃料電池 Download PDFInfo
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Description
多孔性高分子マトリックスとしてスルホン化された高フッ化ポリマーであるNafion 115(Dupont社製)を使用し、下記表1の組成でアクリルポリオール(AA−916−40、愛敬化学)、溶媒(1−プロパノール)及び硬化剤(DN980S、愛敬化学)を含む含浸溶液を製造した。Nafion 115を含浸溶液に10分〜24時間含浸させて、60℃〜150℃の温度で3分〜24時間加熱して溶媒を除去し、硬化させることによって本発明に係る高分子膜を製造した。
実施例1及び実施例2に係る高分子膜を製造した後、それぞれのイオン伝導度を高分子膜と電極との接触面積が1cm2である2−ポイントプローブ装置を利用して測定した。下記表2に含浸時間によるイオン伝導度を表した。
実施例1及び実施例2の高分子膜、Nafion 115を電解質膜として使用し、評価例1のような方法で燃料電池を製造した後、メタノールのクロスオーバー程度を測定し、その結果を下記表4に表した。
Claims (16)
- 多孔性高分子マトリックスと、
前記多孔性高分子マトリックスの気孔内に含浸されたアクリル系高分子と、
を含み、
前記多孔性高分子マトリックスは、スルホン化された高フッ化ポリマー、スルホン化されたポリスルホン、スルホン化されたポリスチレン、スルホン化されたポリエーテルエーテルケトン及びポリジメチルシロキサンブロック共重合体からなる群から選択され、
前記アクリル系高分子は、アクリルポリオールと硬化剤との硬化反応によって形成されることを特徴とする、高分子膜。 - 前記アクリルポリオールは、メチルメタクリレート、ブチルアクリレート、エチルアクリレート、ブチルメタクリレート、エチルメタクリレート、メタクリル酸及びアクリル酸からなる群から選択される一つ以上のモノマーから製造されるアクリルポリオールであることを特徴とする、請求項1に記載の高分子膜。
- 前記硬化剤は、ヘキサメチレンジイソシアネート、トルエンジイソシアネート、メチレンジフェニルジイソシアネート、フェニレンジイソシアネート、ナフタレンジイソシアネート及びイソホロンジイソシアネートからなる群から選択される一つ以上の硬化剤であることを特徴とする、請求項1に記載の高分子膜。
- 前記アクリルポリオールと前記硬化剤との硬化反応において、イソシアネート基/OH基のモル比は、3〜0.1であることを特徴とする、請求項1に記載の高分子膜。
- 前記アクリル系高分子は、前記多孔性高分子マトリックス100質量部に対して0.1〜5質量部の含量で含まれることを特徴とする、請求項1に記載の高分子膜。
- 前記高分子膜は、10−4S/cm〜0.1S/cmのイオン伝導度を有することを特徴とする、請求項1に記載の高分子膜。
- 多孔性高分子マトリックスを準備する工程と、
アクリルポリオール及び硬化剤を溶媒に混合して含浸溶液を製造する工程と、
前記多孔性高分子マトリックスを前記含浸溶液に含浸させる工程と、
前記含浸結果物を加熱して溶媒を除去し、硬化させることによって高分子膜を製造する工程と、
を含み、
前記多孔性高分子マトリックスは、スルホン化された高フッ化ポリマー、スルホン化されたポリスルホン、スルホン化されたポリスチレン、スルホン化されたポリエーテルエーテルケトン及びポリジメチルシロキサンブロック共重合体からなる群から選択されることを特徴とする、高分子膜の製造方法。 - 前記溶媒は、1−プロパノール、イソプロパノール、メタノール、エタノール、メチルエチルケトン、トルエン、ジメチルホルムアミド、ジメチルアセトアミド、ジメチルスルホキシド、1−メチル−2−ピロリジノン、テトラヒドロフラン及びその混合物からなる群から選択されることを特徴とする、請求項7に記載の高分子膜の製造方法。
- 前記アクリルポリオールは、メチルメタクリレート、ブチルアクリレート、エチルアクリレート、ブチルメタクリレート、エチルメタクリレート、メタクリル酸及びアクリル酸からなる群から選択される一つ以上のモノマーから製造されるアクリルポリオールであることを特徴とする、請求項7に記載の高分子膜の製造方法。
- 前記硬化剤は、ヘキサメチレンジイソシアネート、トルエンジイソシアネート、メチレンジフェニルジイソシアネート、フェニレンジイソシアネート、ナフタレンジイソシアネート及びイソホロンジイソシアネートからなる群から選択される一つ以上の硬化剤であることを特徴とする、請求項7に記載の高分子膜の製造方法。
- 前記アクリルポリオールの含量は、前記溶媒100質量部に対して0.01〜7.5質量部であり、
前記硬化剤の含量は、前記溶媒100質量部に対して0.002〜1.5質量部であることを特徴とする、請求項7に記載の高分子膜の製造方法。 - 前記アクリルポリオール中の固形分の含量は、10質量%〜100質量%であり、
前記硬化剤中の固形分の含量は、10質量%〜100質量%であることを特徴とする、請求項7に記載の高分子膜の製造方法。 - 前記アクリルポリオール中の固形分と前記硬化剤中の固形分との質量比は、0.1〜1であることを特徴とする、請求項7に記載の高分子膜の製造方法。
- 前記多孔性高分子マトリックスを含浸させる含浸時間は、10分〜24時間であることを特徴とする、請求項7に記載の高分子膜の製造方法。
- 前記加熱は、60℃〜150℃の温度で3分〜24時間行われることを特徴とする、請求項7に記載の高分子膜の製造方法。
- カソードと、
アノードと、
前記カソードと前記アノードとの間に介在される請求項1〜請求項6のうち何れか1項に記載の高分子膜と、
を備えることを特徴とする、燃料電池。
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