JP5667562B2 - ナノ粒子の乾式分散方法、並びに階層構造およびコーティングの製造 - Google Patents
ナノ粒子の乾式分散方法、並びに階層構造およびコーティングの製造 Download PDFInfo
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- JP5667562B2 JP5667562B2 JP2011519200A JP2011519200A JP5667562B2 JP 5667562 B2 JP5667562 B2 JP 5667562B2 JP 2011519200 A JP2011519200 A JP 2011519200A JP 2011519200 A JP2011519200 A JP 2011519200A JP 5667562 B2 JP5667562 B2 JP 5667562B2
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Description
平均粒径が6μm以下のAl2 O3 粒子5gと、平均粒径が50μm未満のCo3 O4 粒子0.05gとを用いた。これら2つのセラミック粉体を密閉管状ナイロン容器に入れた。ターブラー型シェイカーミキサーの容積は60cm3 で、利用可能容積の1/4を占めた。容器を30rpmで5分間攪拌した。容器を空にし、得られた混合物には、図1に示すように、Al2 O3 支持粒子上に効果的に分散したCo3 O4 ナノ粒子が見られた。ナノ粒子の比率を0.03重量%から5重量%に変えることによって、図4の反射率曲線に基づいて効果的な分散が得られた。混合物におけるナノ粒子の重量比率をより高くすると、分散ナノ粒子とともに非分散凝集体が得られた。
平均長さが3mmで直径が10μmのガラス繊維5gと、平均長さが1.5μmで平均直径が40nmの海泡石繊維状粒子5重量%とを用いた。これら2つの材料を密閉管状ナイロン容器に入れた。ターブラー型シェイカーミキサーの容積は60cm3 であった。容器を60rpmで10分間攪拌した。容器を空にし、得られた混合物には、図10に示すように、ガラス繊維糸上における海泡石ナノ粒子の効果的な分散が見られた。
表面積が2cm2 の平面単結晶Si基板をターブラー型シェイカーミキサーで用いた密閉容器の蓋の内部に接着テープで固定した。20nmより小さいNiOナノ粒子1gを容器に導入した。混合物を42rpmで3分間攪拌した。基板を取り出し、表面に被着した過剰ナノ粒子を4バールの圧縮空気銃を用いて除去した。分散NiOナノ粒子の層の厚さは、偏光解析法で測定したところ、30nmであった。
サイズが200μm以下で形態が不規則なポリアミド粒子1000gと、平均長さが1.5μmで平均直径が40nmの海泡石30gとを用いた。両材料を実容積の1/3を占めるアイリッヒ集中ミキサーのステンレスボウルに導入した。ミキサーを30rpmで回転させ、各ブレードをそれぞれ反対方向に40rpmで回転させた。混合処理を10分間行った。得られた生成物は、ポリアミド粒子の表面に分散した海泡石繊維からなるものであった。
平均粒径が400nm以下のZnO粒子1gと、平均サイズが50nm未満のCo3 O4 ナノ粒子3gとを用いた。両セラミック粉体を密閉管状ナイロン容器に入れた。ターブラー型シェイカーミキサーの容積は60cm3 で、利用可能容積の1/3を占めた。容器を30rpmで5分間攪拌した。容器を空にし、得られた混合物0.25gと平均粒径が6μm以下のAl2 O3 粒子5gを用いた。この新たな混合物を上記の容器に導入し、利用可能容積の1/4を占めた。容器を60rpmで5分間攪拌した。容器を空にし、得られた混合物を99%のアルミナ坩堝に入れ、オーブンで加熱速度5℃/min、1000℃で2時間熱処理し、冷却した。最終生成物は、亜鉛およびコバルトアルミン酸塩に対応するスピネル型結晶構造からなるアルミナ粒子に被覆されていることを特徴とした。CIELAB座標によって測定された色の強さは、市販の色素に対して4−ΔE未満の色調差を示した。この実施例に記載された色素は、市販の色素を得るのに必要なコバルトの20重量%しか使用していない。
Claims (10)
- 乾性媒質においてナノ粒子を30rpm、40rpm、42rpmまたは60rpmから選択される速度にて攪拌する工程を含む、少なくとも1つの寸法においてサイズが100nm未満のナノ粒子を他の支持粒子上に分散させる方法であって、
上記攪拌は、シェイカーミキサーで行われ、かつ、
上記ナノ粒子は、金属酸化物、水酸化物、炭酸塩、硫酸塩、リン酸塩、ケイ酸塩、ホウ酸塩、アルミン酸塩、熱安定高分子、熱融解高分子、高分子樹脂、およびそれらの任意の組み合わせからなる群より選択される、方法。 - 上記ナノ粒子は、上記支持粒子に対して5重量%未満の割合で分散のために添加される、請求項1に記載の方法。
- 上記支持粒子は、無機材料、有機材料、金属材料からなる群より独立して選択される、請求項1または2に記載の方法。
- 上記ナノ粒子は、性質が同じでありまたは異なっており、海泡石、酸化アルミニウム、酸化コバルト、酸化銅、酸化錫、酸化ニッケル、シリコン、酸化チタン、酸化亜鉛、およびそれらの任意の組み合わせからなる群より選択される、請求項1に記載の方法。
- 上記支持粒子は、酸化アルミニウムまたは酸化亜鉛である、請求項3に記載の方法。
- 上記支持粒子は、種々の形態をとり得る、請求項1に記載の方法。
- 上記シェイカーミキサーは、ふるい振とう器、ターブラーミキサー、V型ミキサー、ドラムミキサー、自由投下型ミキサー、コンクリートミキサー、およびアイリッヒ集中ミキサーからなる群より選択される、請求項1に記載の方法。
- 分散物に熱処理を施す、請求項1〜7の何れか1項に記載の方法。
- 請求項1〜8の何れか1項に記載の方法によって取得可能な、階層構造を有するナノ構造であって、
上記ナノ構造は、支持粒子の外側に分散され、付着力を備える界面によって固定されたナノ粒子からなり、
上記ナノ粒子は、金属酸化物、水酸化物、炭酸塩、硫酸塩、リン酸塩、ケイ酸塩、ホウ酸塩、アルミン酸塩、熱安定高分子、熱融解高分子、高分子樹脂、およびそれらの任意の組み合わせからなる群より選択される、ナノ構造。 - 複合材料、セラミックス、高分子、塗料、セメント、触媒、および薬剤からなる群より選択される材料を調製するための、請求項9に記載のナノ構造の使用。
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ES200802177A ES2332079B1 (es) | 2008-07-22 | 2008-07-22 | Procedimiento para la dispersion de nanoparticulas en seco y la obtencion de estructuras jerarquicas y recubrimientos. |
PCT/ES2009/070299 WO2010010220A1 (es) | 2008-07-22 | 2009-07-21 | Procedimiento para la dispersión de nanopartículas en seco y la obtención de estructuras jerárquicas y recubrimientos |
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