JP2009120627A - ガスバリア性の炭素繊維強化プリプレグ及び炭素繊維強化プラスチック並びにそれらの製造方法 - Google Patents
ガスバリア性の炭素繊維強化プリプレグ及び炭素繊維強化プラスチック並びにそれらの製造方法 Download PDFInfo
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- JP2009120627A JP2009120627A JP2007292659A JP2007292659A JP2009120627A JP 2009120627 A JP2009120627 A JP 2009120627A JP 2007292659 A JP2007292659 A JP 2007292659A JP 2007292659 A JP2007292659 A JP 2007292659A JP 2009120627 A JP2009120627 A JP 2009120627A
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- carbon fiber
- fiber reinforced
- gas barrier
- gas
- prepreg
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Abstract
【解決手段】シート状の炭素繊維強化材とマトリックス樹脂とからなる炭素繊維強化プリプレグであって、プリプレグの内部に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア層を有するガスバリア性の炭素繊維強化プリプレグ、及びそれから得られる炭素繊維強化プラスチック。かかるプリプレグは、例えば、シート状の炭素繊維強化材とマトリックス樹脂とからなる炭素繊維強化プリプレグの積層体の少なくとも一つの層間に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア性のフィルム状物を配置し、その後、この積層体を加熱及び/又は加圧することによって得られる。
【選択図】なし
Description
粘土として、2gの天然モンモリロナイト(クニピアP、クニミネ工業株式会社製)を、60ccの蒸留水に加え、プラスチック製密封容器に、テフロン(登録商標)製回転子と共に入れ、激しく振とうし、均一な分散液を得た。次に、真空脱泡装置により、この粘土分散液の脱気を行った。この分散液を、長さ約30cm、幅20cmの真鍮製板の上に、厚さ約2mmで塗布し、これを水平に静置し、強制送風式オーブン中で60℃の温度条件下で30分乾燥し、厚さ約40μmの粘土層を得、これを真鍮製板から剥離し、粘土自立膜を得た。その後、送風定温恒温器中で、110℃で30分熱処理して粘土膜を得た(粘土膜S)。
粘土として、2.7gの天然モンモリロナイト(クニピアP、クニミネ工業株式会社製)と0.72gの合成雲母(ソマシフME−100、コープケミカル株式会社製)とを、100ccの蒸留水に加え、プラスチック製密封容器に、テフロン(登録商標)回転子と共に入れ、25℃で2時間激しく振とうし、均一な分散液を得た。この分散液に、有機添加物として、メチルビニルエーテル・無水マレイン酸共重合体(ダイセル化学工業株式会社製)を0.18g加え、激しく振とうし、天然モンモリロナイト及びイプシロンカプロラクタムを含む均一な分散液を得た。これを徐々に乾燥させ、粘土ペーストを得た。
図1に示したように、炭素繊維強化プリプレグに上記で得られた粘土膜S又はHを挟み込んで積層し、ホットプレスにより高温硬化させて成形する方法を試みた。炭素繊維強化プリプレグとしては、三菱レイヨン株式会社のPYROFIL#380(製品名)を用いた(PAN系の炭素繊維を用いた弾性率24tonのクロスに、ビスフェノールA型液状エポキシ樹脂を主成分とした樹脂を含浸させた常温タイプのプリプレグ)。
前記で得られた、成形体から半径29mmの円盤を切り取った。そして、一方向の長さが55mmになるように端部を切断して試験片を作成した。試験片の厚みは、ほぼ1.1〜1.2mmであった。かくして得られた試験片を、常温ガス透過試験装置を用いて水素ガスの透過率を測定した(試験体の面積が1521mm2、一次側圧力が93〜209kPa、二次側圧力が真空状態、温度が23.8〜24.6℃で測定)。
代表的な複合材であるガラス繊維強化プラスチック及び炭素繊維強化プラスチックの水素透過率は、凡そ0.5〜5×10−16mol・m/m2・s・Pa程度である。水素透過率は大きく、即ち、水素ガスバリア性が殆どないために、このままでは水素タンクの構造材料として使うことはできない。
2 粘土膜
3 成形型
4 ホットプレス
Claims (14)
- シート状の炭素繊維強化材とマトリックス樹脂とからなる炭素繊維強化プリプレグであって、該プリプレグの内部に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア層を有することを特徴とするガスバリア性の炭素繊維強化プリプレグ。
- ガスバリア層が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項1記載のガスバリア性の炭素繊維強化プリプレグ。
- シート状の炭素繊維強化材とマトリックス樹脂とからなる炭素繊維強化プリプレグの積層体の少なくとも一つの層間に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア性のフィルム状物を配置し、その後、該積層体を加熱及び/又は加圧することを特徴とするガスバリア性の炭素繊維強化プリプレグの製造方法。
- ガスバリア性のフィルム状物が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項3記載のガスバリア性の炭素繊維強化プリプレグの製造方法。
- シート状の炭素繊維強化材とマトリックス樹脂とからなる炭素繊維強化プリプレグの表面に、粘土鉱物の分散液を塗布又は含浸させ、該プリプレグの表面に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア層を形成させ、その後、該
ガスバリア層を形成されたプリプレグを加熱及び/又は加圧するか、あるいは更に、該ガスバリア層の表面にマトリックス樹脂層又は前記炭素繊維強化プリプレグを配置した積層体とした後、該積層体を加熱及び/又は加圧することを特徴とするガスバリア性の炭素繊維強化プリプレグの製造方法。 - 粘土鉱物の分散液が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項5記載のガスバリア性の炭素繊維強化プリプレグの製造方法。
- 炭素繊維強化材とマトリックス樹脂とからなる繊維強化プラスチックであって、その内部に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア層を有することを特徴とするガスバリア性の炭素繊維強化プラスチック。
- ガスバリア層が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項7記載のガスバリア性の炭素繊維強化プラスチック。
- 成形型に敷設された炭素繊維強化材とマトリックス樹脂とからなる炭素繊維強化プリプレグの積層体の少なくとも一つの層間に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア性のフィルム状物を配置し、その後、成形型を型締めし、加熱及び/又は加圧して成形することを特徴とするガスバリア性の炭素繊維強化プラスチックの製造方法。
- ガスバリア性のフィルム状物が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項9記載のガスバリア性の炭素繊維強化プラスチックの製造方法。
- 成形型に敷設されたシート状の炭素繊維強化材の積層体の少なくとも一つの層間に、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア性のフィルム状物を配置し、その後、樹脂トランスファー成形法又は樹脂フィルムインフュージョン成形法で成形することを特徴とするガスバリア性の炭素繊維強化プラスチックの製造方法。
- ガスバリア性のフィルム状物が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項11記載のガスバリア性の炭素繊維強化プラスチックの製造方法。
- フィラメントワインディング成形法において、マンドレルに炭素繊維強化材とマトリックス樹脂とからなる複合材を巻回・積層するに際し、板状の結晶構造を持つ粘土鉱物が、一方向に配向し且つ緻密に積層したガスバリア性のフィルム状物を、巻回途中の層中に配置し、その後、マトリックス樹脂を加熱硬化させることを特徴とするガスバリア性の炭素繊維強化プラスチックの製造方法。
- ガスバリア性のフィルム状物が、粘土鉱物に対して3〜30質量%の有機添加物を含むことを特徴とする請求項13記載のガスバリア性の炭素繊維強化プラスチックの製造方法。
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PCT/JP2008/069459 WO2009060747A1 (ja) | 2007-11-10 | 2008-10-27 | ガスバリア性の炭素繊維強化プリプレグ及び炭素繊維強化プラスチック並びにそれらの製造方法 |
US12/741,553 US7981500B2 (en) | 2007-11-10 | 2008-10-27 | Carbon fiber reinforced prepreg of gas barrier properties, carbon fiber reinforced plastic and methods of producing the same |
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US7981500B2 (en) | 2011-07-19 |
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WO2009060747A1 (ja) | 2009-05-14 |
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