JP2015509916A - 合成ゼオライトに充填された金属イオンを含む抗微生物性材料 - Google Patents
合成ゼオライトに充填された金属イオンを含む抗微生物性材料 Download PDFInfo
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- JP2015509916A JP2015509916A JP2014549616A JP2014549616A JP2015509916A JP 2015509916 A JP2015509916 A JP 2015509916A JP 2014549616 A JP2014549616 A JP 2014549616A JP 2014549616 A JP2014549616 A JP 2014549616A JP 2015509916 A JP2015509916 A JP 2015509916A
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- Prior art keywords
- zeolite
- silver
- metal
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Images
Classifications
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
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- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
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Abstract
Description
本発明は、抗微生物特徴を有するプラスチック、セメント、プラスターおよび塗料などの建築用材料(construction material)の実現に関する。
生活状態の変化、食習慣、公共交通機関の利用の増加、国外旅行手段の急増、および個人がその時間の大半を自宅外で過ごすという事実など、さまざまな要因により、人々は微生物と触れ合うことが増えている。真菌や細菌などの微生物は、世界中のほとんどどこでも生きることができ、それらの一部は、ヒト、動物および植物に臨床的に重大な疾病をもたらしうる。数多くの研究により、窒素循環などのさまざまな自然現象における微生物の役割と、環境衛生およびヒトの健康という観点からみたそれらの意義が明らかになっている。さらにまた、遺伝子工学的方法のおかげで、バイオテクノロジー、遺伝学および分子生物学などの科学分野における微生物の使用も増加している。しかし、これらの有用微生物だけでなく、他の生物に影響を及ぼすことによって植物、動物およびヒトの死をもたらす原発性病原体および日和見病原体も存在する。手術室などの医療サービス区域外で観察される低濃度の微生物は、無害であると許容することができる。それでも、これらの無害微生物が多数になると、疾患リスクも増大する。
本発明の目的は、銀、銅および亜鉛金属イオンが個別に添加されたゼオライト含有抗真菌性、抗カンジダ性および抗細菌性建築用材料を提供することである。
本発明の抗微生物性材料の合成においては、まず、ゼオライト合成を行う。
さまざまなシリカ・アルミナ比を持つゼオライトタイプ(ゼオライトXおよびゼオライトA)に必要なメタケイ酸ナトリウム(Na2O:SiO2:5H2O)、アルミン酸ナトリウム(Al2O3:1.4Na2O)、水酸化ナトリウム(NaOH:0.07H2O)および水(H2O)の量は、それぞれ8.71、0.04、2.57および88.68グラムと計算された。水を2分割し、高密度ポリウレタン容器に入れた。これらの容器の一方にメタケイ酸ナトリウムだけを加え、溶解させた。他方の容器にアルミン酸ナトリウムおよび水酸化ナトリウムを加えて完全に溶解させた。次に、2つの容器内の混合物を一つに混合し、それらが均一な混合物を形成するまで撹拌した。その新しい混合物を、ゼオライト合成のために、3日間、90℃に保った。3日間の最後に、合成されたゼオライトを減圧濾過で濾過した。それを90℃で24時間乾燥した。得られたゼオライトをブレンダーまたは乳棒による粉砕で粉末にした。銀、亜鉛および銅イオン交換を行うことで、微粉ゼオライトを抗微生物性にした。
銀イオン交換のために、1リットルの0.6〜1M硝酸銀または銀イオン交換が可能な他の銀化合物から、溶液を調製した。その溶液に80gのゼオライトを加え、室温、200〜250rpmで、3日間、暗所で撹拌した。
改変ディスク拡散法
各微生物に対する製品の抗微生物活性を試験するために、標準的NCCLSディスク拡散法[30]に改良を加えて使用した。適当な濃度の銀、亜鉛および銅を充填したゼオライト製剤の抗微生物特徴を、改変ディスク拡散法の応用によって調べた。108cfu/mlの細菌、106cfu/mlの酵母および104胞子/mlの真菌を含む100μl溶液を、新しい培養物で調製し、拡散法で、栄養寒天(NA)、サブローデキストロース寒天(SDA)およびジャガイモデキストロース寒天(PDA)に、それぞれ接種した。20μlの滅菌水を空ディスクに滴下し、それを微粉金属イオン充填ゼオライト混合物に埋めた。金属充填ゼオライトでコードされた空ディスクを、接種済みのペトリ皿に置いた。20μlの滅菌水を滴下した空ディスクを陰性対照として使用した。オフロキサシン(10μg/ディスク)およびナイスタチン(30μg/ディスク)を、それぞれ細菌および真菌用の陽性対照群として使用した。接種して改変ディスク拡散法を適用したペトリ皿を、細菌については24時間、酵母については48時間にわたって、36±1℃に保ち、真菌については72時間にわたって25±1℃に保った。改変ディスク拡散法で試験した微生物について、抗微生物活性阻止帯を測定し、評価した。全ての試験を少なくとも2回は繰り返した。
ゼオライトの抗微生物特徴の試験に先立って、まず、ゼオライトを、蒸留水(20μl)で湿らせた後の空ディスクに付着させた。試験すべき微生物を適当な栄養培地(PDA、SDA、およびTSA)に接種した後、イオン交換ゼオライトでコードされたディスクをそれらの上に置き、これらの微生物を1〜7日間インキュベートした。各培地においてディスクの周りに生じるインキュベーション後の阻止帯形成(微生物が成長しない部分)を、試験した微生物に対する抗微生物効果として同定した。
この研究では、適切な栄養培地(1ml)を、銀および亜鉛−ゼオライトを含有している/含有していない塗料、プラスター、セメント、プラスチックなどの建築用材料から調製した表面に滴下し、これらの表面を細菌、酵母、真菌などの異なる微生物で汚染させた。それらが経時的にその抗微生物特徴を保つかどうかを理解するために、促進寿命試験を行った。したがって、銀および亜鉛ゼオライトを含有する/含有しない建築用材料で作った微生物汚染表面を、特別なインキュベータ中に1年間維持した(細菌および発酵体の場合は36±1℃、真菌の場合は25±1℃)。その間、微生物汚染表面での微生物の成長と発生を助長するために、栄養培地を絶えず補充した。これらの表面での微生物成長が起きたかどうかは、被験建築用材料での遡及的分離(retroactive isolation)プロセスを毎月行うことによって決定した。1年間のインキュベーション継続期間の最後における試験結果を表1および表2に要約する。
インビトロのペトリ上で行った改変ディスク拡散試験の結果は、黄色ブドウ球菌に対する、銀、銅および亜鉛イオン交換ゼオライトでコードされたディスクの抗細菌効果を示している(図1a、b、c)。ペトリの全ての部分で細菌成長が観察されたが、金属イオン交換ゼオライトでコードされたディスクの周りには細菌成長が観察されなかった。同様に、銀、銅および亜鉛イオン交換ゼオライトでコードされたディスクの抗カンジダ効果および抗真菌効果も、それぞれカンジダ・アルビカンス(図1d、e、f)およびペニシリウム・チャーレシイ(図1g、h、i)に対して観察された。酵母(カンジダ・アルビカンス)および真菌(ペニシリウム・チャーレシイ)を接種した培地では、金属イオン交換ゼオライトディスクの周りだけに、阻止帯が観察された(図1)。
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Claims (12)
- 銀、亜鉛、銅金属イオンが合成ゼオライトに充填されている抗微生物性材料。
- ゼオライトに充填される金属イオン濃度が0.3〜1M硝酸銀である、請求項1に記載の材料。
- ゼオライトに充填される金属イオン濃度が0.5〜2M塩化亜鉛である、請求項1に記載の材料。
- ゼオライトに充填される金属イオン濃度が0.3〜1M硫酸銅である、請求項1に記載の材料。
- ゼオライトに金属イオンを添加することによって、微生物汚染を、対数期の間、防止し、かつ生物学的劣化、腐食および崩壊に対して耐久性である、請求項2〜4のいずれか一項に記載の材料。
- 細菌である大腸菌、黄色ブドウ球菌、バチルス・コアギュランス、バチルス・メガテリウム、枯草菌、エンテロコッカス・フェシウム、シュードキサントモナス属、シュードモナス・プチダ、緑膿菌、シュードモナス・マクリコラ、シュードモナス・クロロラフィス、シュードモナス・フルオレッセンス、ノカルジア・ブラジリエンシス、ノカルジア・グロベルラ、アシネトバクター遺伝種、アシネトバクター・カルコアセティカス、アシネトバクター・バウマンニ、ステノトロホモナス・マルトフィリア、パントエア・スチューアルティ亜種スチューアルテイ、クリセオバクテリウム・バルスチヌム、デュガネラ・ズーグロエオイデス、クリセオバクテリウム・メニンゴセプチカム、スタフィロコッカス・ホミニス、ノカルジア・トランスバレンシス、バークホルデリア・グルメ、ペディオコッカス・アシディラクティシ/パルブルス、スフィンゴモナス・テラエ、コリネバクテリウム属、ゴルドニア・ルブリペルティンクタ、ロドコッカス・ロドニイ、ブレブンディモナス・ベシキュラリス、プロビデンシア・ヘイムバッカエ、ゴルドニア・スプティ、セルロシミクロビウム・セルランス、スフィンゴモナス・サングイニス、ハイドロゲノファーガ・シュードフラバ、アクチノマヅラ・クレメア、キサントモナス属の成長および繁殖を防止する、請求項5に記載の材料。
- 発酵体であるカンジダ・アルビカンス、カンジダ・パラプシローシス、カンジダ・トロピカリス、カンジダ・グラブラタ、クルイベロミセス・マルキシアヌス、ハイフォピチア・ブルトニイの成長および繁殖を防止する、請求項5に記載の材料。
- カビであるフサリウム・オキシスポラム、灰色かび病菌、クロコウジカビ、アルテルナリア・アルテルナータ、スクレロチニア・スクレロチオラム、ペシロミセス・リラシヌス、ペニシリウム・ビナセウム、ペニシリウム・エクスパンサム、ペニシリウム・チャーレシイ、ペニシリウム・エクスパンサムの成長および繁殖を防止する、請求項5に記載の材料。
- プラスチック材料に加えられることによって抗細菌特徴を示す、請求項5〜8のいずれか一項に記載の材料。
- セメントおよびプラスターに加えられることによって抗細菌特徴を示す、請求項5〜8のいずれか一項に記載の材料。
- あらゆる種類の塗料に加えられることによって抗細菌特徴を示す、請求項5〜8のいずれか一項に記載の材料。
- 技術的製品の原材料および表面塗料に加えることにより、とりわけあらゆる種類の金属製およびプラスチック製家庭用器具、病院および診療所において衛生を必要とする医療用具、公共区域において使用されるあらゆる塗装金属およびプラスチック表面、家屋用の塗料およびコーティング、車両の表面、空気調節装置、テレビおよびコンピュータの金属製およびプラスチック製部品に応用することができる、請求項9〜11のいずれか一項に記載の材料。
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TR2011/13331 | 2011-12-30 | ||
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PCT/IB2012/057753 WO2013098774A1 (en) | 2011-12-30 | 2012-12-27 | Antimicrobial material comprising a metal ion charged on synthesized zeolite |
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JP2017120553A Pending JP2018024633A (ja) | 2011-12-30 | 2017-06-20 | 合成ゼオライトに充填された金属イオンを含む抗微生物性材料 |
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EP (1) | EP2797412A1 (ja) |
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US9656876B1 (en) | 2015-11-03 | 2017-05-23 | Certainteed Gypsum, Inc. | Method for reducing elemental sulfur in gypsum products |
ES2571995B2 (es) * | 2016-04-21 | 2016-09-23 | Pavimentos De Tudela S.A. | Composición para preparar prefabricados de hormigón y derivados del cemento con propiedades bactericidas y fungicidas, prefabricados de hormigón que la contienen y procedimiento de obtención de los mismos |
LV15345B (lv) * | 2017-01-10 | 2018-10-20 | Alina, Sia | Metālu nesaturoša antimikrobiāla un pret UV stariem aizsargājoša piedeva |
KR102260902B1 (ko) * | 2019-11-28 | 2021-06-03 | 긴미라이 가부시키가이샤 | 은 제균성 스폰지 양치 기구, 은 제균성 칫솔 및 이의 제조방법 |
TWI799268B (zh) * | 2022-05-16 | 2023-04-11 | 國立中正大學 | 介孔二氧化矽奈米粒的製備方法 |
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JP2018024633A (ja) | 2018-02-15 |
US20150030532A1 (en) | 2015-01-29 |
EP2797412A1 (en) | 2014-11-05 |
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