Super-hydrophobic water repellant powder

Details Super-hydrophobic water repellant powder Super-hydrophobic water repellant powder

C - Chemistry, Metallurgy

09

K

C09K 3/18 (2006.01) C03C 12/00 (2006.01) C03C 15/00 (2006.01) C03C 17/30 (2006.01)

Patent

CA 2688723

A composition of matter is a plurality of solid particles of at least 100 nm to about 10 µm in size having a plurality of nanopores where at least some of the nanopores provide flow through porosity, and the surface of the particles displays a plurality of spaced apart nanostructured features with a contiguous material protruding at the surface and optionally at least one interpenetrating recessing contiguous material. The particles are superhydrophobic when the protruding material is hydrophobic or a hydrophobic coating conforms to the surface of the particle. Articles with superhydrophobic surfaces can be formed by the coating of the particles on a solid substrate.

L'invention concerne une composition de matière constituée d'une pluralité de particules solides ayant une taille d'au moins 100 nm à environ 10 µm et ayant une pluralité de nanopores, caractérisée en ce qu'au moins certains des nanopores permettent une porosité traversante et en ce que la surface des particules présente une pluralité de nanoparticularités séparées, avec une matière adjacente en saillie au niveau de la surface et facultativement au moins une matière adjacente en creux interpénétrée. Les particules sont extrêmement hydrophobes lorsque la matière en saillie est hydrophobe ou lorsqu'un revêtement hydrophobe recouvre la surface de celles-ci. On peut former des articles ayant des surfaces extrêmement hydrophobes en formant un revêtement des particules sur un substrat solide.

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