Multi-layer coated porous materials and methods of making the same
First Claim
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1. A multi-layer coated material comprising a surface activated substrate, a first layer, and a second layer, wherein the surface activated substrate comprises a sintered porous polymeric material;
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
the second layer comprises polyelectrolyte molecules bound to the first layer through covalent bonds, electrostatic interactions, or combinations thereof.
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Abstract
Multi-layer coated materials and methods of making them are disclosed. In a specific embodiment, a porous polymeric substrate is pre-activated and immersed in a polyelectrolyte solution to form a first layer having an electric charge and at least one functional group. The coated material is next immersed in a second solution of a material having an electric charge opposite of that of the first layer to provide a bi-layer coating. This process can be repeated to form multi-layer coatings on porous substrates.
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Citations
9 Claims
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1. A multi-layer coated material comprising a surface activated substrate, a first layer, and a second layer, wherein the surface activated substrate comprises a sintered porous polymeric material;
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
the second layer comprises polyelectrolyte molecules bound to the first layer through covalent bonds, electrostatic interactions, or combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
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8. A multi-layer coated material comprising a surface activated substrate, a first layer, and a second layer, wherein the surface activated substrate comprises a sintered porous polymeric material;
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
the second layer comprises poly(acrylic acid) molecules bound to the first layer through covalent bonds, electrostatic interactions, or combinations thereof.
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
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9. A multi-layer coated material comprising a surface activated substrate, a first layer, and a second layer, wherein the surface activated substrate comprises a sintered porous polymeric material;
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
the second layer comprises poly(acrylic acid) molecules bound directly to the first layer through covalent bonds and electrostatic interactions, the poly(acrylic acid) molecules comprising neutral carboxyl functional groups and charged carboxyl functional groups.
- the first layer comprises polyethylenimine molecules bound directly to a surface of the surface activated substrate through covalent bonds and electrostatic interactions, the polyethylenimine molecules comprising neutral amine functional groups and charged amine functional groups; and
Specification