JP2006061320A - 環境浄化用部材 - Google Patents
環境浄化用部材 Download PDFInfo
- Publication number
- JP2006061320A JP2006061320A JP2004245903A JP2004245903A JP2006061320A JP 2006061320 A JP2006061320 A JP 2006061320A JP 2004245903 A JP2004245903 A JP 2004245903A JP 2004245903 A JP2004245903 A JP 2004245903A JP 2006061320 A JP2006061320 A JP 2006061320A
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- Prior art keywords
- fine particles
- resin
- environmental purification
- purification member
- rare element
- Prior art date
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Images
Abstract
【解決手段】 天然放射性希有元素鉱物の微粒子が、少なくとも表面が樹脂からなる基体表面に固定されてなる環境浄化用部材であって、微粒子の表面に不飽和結合を有するシランモノマーの薄膜が形成され、基体表面の樹脂と微粒子表面に形成された薄膜との一部が化学結合して、基体表面に微粒子が化学結合されてなる環境浄化用部材無機微粒子が固定されてなる親水性を有する複合部材であって、無機微粒子の表面に不飽和結合を有するシランモノマーの薄膜が形成され、基体表面の樹脂と微粒子表面に形成された薄膜との一部が化学結合して、樹脂表面と薄膜に存在する不飽和結合とを、グラフト重合により化学結合させる。グラフト重合としては放射線グラフト重合を用いるのが好ましい。
【選択図】 図1
Description
以下に、本発明の第1実施形態の環境浄化用部材について詳述する。
(第2実施形態)
次に、本発明の第2実施形態の環境浄化用部材について詳述する。
(第3の実施形態)
次に、本発明の第3実施形態の環境浄化用部材について詳述する。
本実施形態の環境浄化用部材300として天然放射性希有元素鉱物の微粒子2とともに無機微粒子6としては、光触媒微粒子が好適に用いられる。光触媒微粒子とは、そのバンドギャップ以上のエネルギーを持つ波長の光を照射することで、光触媒機能を発現する粒子のことであり、酸化チタンや、酸化亜鉛や、酸化タングステンや、酸化鉄や、チタン酸ストロンチウムや、硫化カドミウムや、セレン化カドミウムなどの公知の金属化合物半導体を、単一または2種以上組み合わせて用いることができる。これらの光触媒微粒子のうち、透明性、耐久性に優れ、無害である酸化チタンが、特に好ましく用いられる。
(第4実施形態)
次に、本発明の第4実施形態の環境浄化用部材について詳述する。
本発明の各実施形態によれば、前述したように、フィルム状、繊維状、布状、メッシュ状、ハニカム状など、使用目的に合った様々な形態(形状、大きさ等)に適応できるので、外壁材、サッシ、ドア、ブラインドなどの建装材、壁紙、カーペット、樹脂タイルなどの内装材、衣類、インナーウェア、靴下、手袋、靴等の履物、該履物用の中敷、パジャマ、マット、シーツ、枕、枕カバー、毛布、タオルケット、蒲団および蒲団カバーなどの寝装材、帽子、ハンカチ、タオル、絨毯、カーテン、フィルターまたは防虫網などに環境浄化機能を付加できることが可能となる。従って、本発明の各実施形態の複合部材は、様々な分野に優れた各種製品を提供することができる。
天然鉱物であるトルマリンの微粒子と天然放射性稀有元素鉱物であるイルメナイトの微粒子の混合物(中里屋株式会社製)が10重量%分散したメタノール溶液をビーズミルで4時間、粉砕分散処理した。次に、不飽和結合を持つ3−メタクリロキシプロピルメチルジメトキシシラン(信越化学工業株式会社製、KBM−502)を粉砕分散したイルメナイト分散メタノール溶液、固形分に対して0.3重量%加えた後、冷却管を備えたフラスコに移し、その後フラスコをオイルバスで加熱し、3時間還流下で処理することにより、粉砕分散したトルマリンおよびイルメナイト微粒子の表面にシランカップリング剤を脱水縮合反応により結合させた。
天然放射性稀有元素鉱物であるイルメナイトの微粒子(中里屋株式会社製)が10重量%分散したメタノール溶液をビーズミルで3時間、粉砕分散処理した。次に、不飽和結合を持つ3−メタクリロキシプロピルトリメトキシシラン(信越化学工業株式会社製、KBE−503)を粉砕分散したイルメナイト分散メタノール溶液、固形分に対して0.1重量%加えた後、冷却管を備えたフラスコに移し、その後フラスコをオイルバスで加熱し、3時間還流下で処理することにより、粉砕分散したイルメナイト微粒子の表面にシランカップリング剤を脱水縮合反応により結合させ、処理液Aとした。
実施例2で用いた超微粒子酸化チタンの代わりに、可視光応答型光触媒(エコデバイス株式会社製、ブルーアクティブBA−PW25)を用いた以外は実施例2と同様の条件で光触媒微粒子を含む環境浄化用部材を得た。
125μmのポリエステルフィルム(パナック株式会社製、ルミラー)に電子線を200kVの加速電圧で5Mrad照射した。その後、電子線を照射したポリエステルフィルムを実施例2で用いた処理液に3時間浸漬して余分の処理液を流水中で洗浄除去した後、乾燥することで環境浄化用部材を得た。
天然放射性稀有元素鉱物であるバテライトの微粒子(美濃顔料化学株式会社製ZB480)が20重量%分散したメタノール溶液をビーズミルで3時間粉砕分散処理した。次に、粉砕分散処理したメタノール溶液に抗菌剤(触媒化成工業株式会社製、アトミーボール)を固形分に対して3重量%加え、さらに、不飽和結合を有するシランカップリング剤としてN−(ビニルベンジル)−2−アミノエチル−3−アミノプロピルトリメトキシシランの塩酸塩を含むメタノール溶液(信越化学工業株式会社製、KBM−573)を0.5重量%加えた後、冷却管を備えたフラスコに移し、その後フラスコをオイルバスで加熱し、4時間還流下で処理することによりバテライトと抗菌剤の微粒子表面にシランカップリング剤を脱水縮合反応により結合させ、得られた溶液を処理液Dとした。
実施例5で用いた処理液Eの代わりに、実施例2で用いた、超微粒子酸化チタンの表面にシランカップリング剤が結合して分散しているメタノール溶液を用いた以外は実施例5と同様の条件で抗菌剤と光触媒微粒子を含む環境浄化用部材を得た。
実施例1で用いた天然放射性稀有元素鉱物であるイルメナイトの微粒子をポリエステル樹脂(日本ユニペット株式会社製)に、10.0重量%、2軸混練機により充填してペレットを作製した。次に、得られたペレットを用いて延伸フィルム成形装置により、イルメナイトを充填した130μmの厚さのフィルムからなる環境浄化用部材を得た。
実施例1で用いた天然放射性稀有元素鉱物であるイルメナイトの微粒子が10重量%分散したメタノール溶液をビーズミルで3時間、粉砕分散処理し、不飽和ポリエステル樹脂水分散溶液(東洋紡績株式会社、バイロナールMD−1200)と1:1の重量比で混合した後、水を加えて固形分を5重量%に調整した。調整して得た水溶液を実施例1で用いたポリエステルフィルム表面にバーコーターで塗布し、120℃、30分乾燥することでイルメナイトを含んだ塗膜が形成された環境浄化用部材を得た。
比較例2で用いたイルメナイトの分散液の代わりに、実施例2で用いた処理液Cを用い、処理液Cと比較例2で用いた不飽和ポリエステル樹脂水分散溶液とを4:1の重量比で混合し、ポリエステルフィルム表面にバーコーターで塗布し、120℃、30分乾燥することでイルメナイトと光触媒を含んだ塗膜が形成された環境浄化用部材を得た。
得られた環境浄化用部材の浄化作用は、アルデヒドガスの分解性と大腸菌の殺菌性より評価した。
作製した環境浄化用部材をテドラーパックに入れた後、100ppm程度の濃度のアセトアルデヒドを同テドラーパック内に5L注入した。次に、テドラーパック内のアセトアルデヒド濃度が一定になるように30分間程度放置した後、光を遮断した環境に24時間放置して放置後のテドラーパック内のアセトアルデヒド濃度をアセトアルデヒドガス検知管(株式会社ガステック製)を用いて測定した。
大腸菌Escherichia coli DH5αをニュートリエント培地で37±1℃、18時間培養し、ニュートリエント培地で1〜2×108Cells/mlに菌体数を調整した後、ニュートリエント培地9.9mlに前記調整した菌体液を0.1ml加えて37±1℃、2時間振とう培養した。培養した大腸菌を遠心集菌し、生理食塩水で洗浄後、生理食塩水に懸濁して1×104Cells/mlに菌体数を調整し、前記菌懸濁液を200μl採取して作製した環境浄化用部材表面に滴下し殺菌試験に用いた。
殺菌率(%)=(試験前の生菌数−試験後の生菌数)/(試験前の生菌数)×100
2:天然放射性希有元素鉱物の微粒子
3:シランカップリング剤
5:化学結合
10:天然放射性希有元素鉱物の微粒子層
100:環境浄化用部材
Claims (7)
- 少なくとも表面が樹脂からなる基体と、
不飽和結合を有するシランモノマーの薄膜が表面に形成された天然放射性希有元素鉱物の微粒子からなり、
前記天然放射性希有元素鉱物の微粒子の表面に形成されたシランモノマーの薄膜と前記基体の表面の樹脂との一部が化学結合して、前記基体に固定されてなる、第1の微粒子層と、
を備えることを特徴とする環境浄化用部材。 - 不飽和結合を有するシランモノマーの薄膜が表面に形成された天然放射性希有元素鉱物の微粒子からなる第2の微粒子層をさらに備え、
該第2の微粒子層は、前記第1の微粒子層の天然放射性希有元素鉱物の微粒子に形成されたシランモノマーの薄膜と前記第2の微粒子層の天然放射性希有元素鉱物の微粒子に形成されたシランモノマーの薄膜とが化学結合し、前記第1の微粒子層に積層して固定される
ことを特徴とする請求項1に記載の環境浄化用部材。 - 少なくとも表面が樹脂からなる基体と、
不飽和結合を有するシランモノマーの薄膜がそれぞれの表面に形成された、天然放射性希有元素鉱物の微粒子と無機微粒子とからなり、
前記天然放射性希有元素鉱物の微粒子と前記無機微粒子とのそれぞれの表面に形成されたシランモノマーの薄膜と、前記基体の表面の樹脂との一部が化学結合して、前記基体に固定されてなる第1の微粒子層と、
を備えることを特徴とする環境浄化用部材。 - 不飽和結合を有するシランモノマーの薄膜がそれぞれの表面に形成された、天然放射性希有元素鉱物の微粒子と無機微粒子とからなる第2の微粒子層をさらに備え、
該第2の微粒子層は、前記第1の微粒子層の天然放射性希有元素鉱物の微粒子と無機微粒子とに形成されたシランモノマーの薄膜と、前記第2の微粒子層の天然放射性希有元素鉱物の微粒子と無機微粒子とに形成されたシランモノマーの薄膜とが化学結合して、前記第1の微粒子層に積層して固定される
ことを特徴とする請求項3に記載の環境浄化用部材。 - 前記無機微粒子の少なくともその一部が、光触媒機能を有する微粒子であることを特徴とする請求項3または4に記載の環境浄化用部材。
- 前記化学結合は、グラフト重合であることを特徴とする請求項1から5のいずれかに記載の環境浄化用部材。
- 前記グラフト重合は、放射線グラフト重合であることを特徴とする請求項6に記載の環境浄化用部材。
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