| CPC C12M 25/02 (2013.01) [B01D 67/0002 (2013.01); B01D 67/009 (2013.01); B01D 69/02 (2013.01); B01D 71/28 (2013.01); B05D 3/148 (2013.01); B05D 5/00 (2013.01); B05D 7/04 (2013.01); C09D 165/04 (2013.01); B01D 2323/02 (2013.01); B01D 2323/04 (2013.01); B01D 2323/10 (2013.01); B01D 2323/35 (2013.01); B01D 2323/46 (2013.01); B01D 2325/36 (2013.01); B01D 2325/38 (2013.01)] | 15 Claims |
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1. A method for modifying a surface of a porous substrate, the method comprising:
depositing a polymer coating onto the surface at ambient temperature to a thickness of less than 0.1 μm to form a coated porous substrate, wherein the polymer coating comprises poly (p-xylylene) or a derivative thereof, and wherein the polymer penetrates into pores of the porous substrate but does not substantially alter porosity of the porous substrate, wherein the porous substrate lacks a primary or secondary aliphatic hydrogen atom; and
exposing the coated porous substrate to a plasma environment having a radio frequency (RF) power of less than or equal to 10 watts, and a monomer at a monomer flow rate of at least 40 standard cubic centimeters per minute (SCCM) to chemically bond a functional agent to the coated porous substrate.
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13. A substrate, comprising:
a porous body having first and second opposed surfaces and comprising a material lacking a primary or secondary aliphatic hydrogen atom;
a polymer coating on at least one of the first and second surfaces, the polymer coating comprising poly (p-xylylene) or a derivative thereof and having a thickness of less than 0.1 μm; and
a functional agent chemically bonded by a plasma treatment to the polymer coating, wherein the functional agent includes an atom of or a molecule containing nitrogen.
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