Treating fluidic channels
Disclosed is the treatment of the interior walls of a fluidic channel with a self-assembled monolayer of an organophosphorus acid.
1 . A method of depositing a thin coating of nanometer dimensions within a fluidic channel comprising:
(a) contacting interior walls of the fluidic channel either directly or indirectly through an intermediate organometallic coating with a an organophosphorus acid,
(b) forming a self-assembled monolayer of the organophosphorus acid adhered to the interior walls of the fluidic channel or to the intermediate organometallic layer.
2 . The method of claim 1 in which the fluidic channel is a closed fluidic circuit.
3 . The method of claim 1 in which the fluidic channel is an open fluidic channel.
4 . The method of claim 3 in which the open fluidic channel is associated with a dispensing device.
5 . The method of claim 2 in which the open fluidic channel is associated with a radiator.
6 . The method of claim 1 in which the fluidic channel is made from metal.
7 . The method of claim 6 in which the fluidic channel is made from iron.
8 . The method of claim 6 in which the metal is a metal alloy.
9 . The method of claim 6 in which the metal alloy is stainless steel.
10 . The method of claim 6 in which the self-assembled monolayer is chemically bonded to the metal.
11 . The method of claim 1 in which the organophosphorus acid is contacted with the intermediate organometallic layer.
12 . The method of claim 1 in which the organometallic layer is a polymeric metal oxide having unreacted alkoxide and/or hydroxyl groups.
13 . The method of claim 12 in which the substrate is a polymeric material.
14 . The method of claim 13 in which the self-assembled monolayer is chemically bonded to the organometallic layer.
15 . The method of claim 1 in which the organophosphorus acid is an organophosphonic acid.
16 . The method of claim 15 in which the organophosphorus acid is an organophosphonic acid or derivative thereof comprising a compound or a mixture of compounds of the structure:
wherein x is 0 to 1, y is 1, z is 1 to 2 and x+y+z=3; R and R″ are each independently a hydrocarbon or substituted hydrocarbon radical having a total of 1 to 30 carbon atoms or an oligiomeric group, R′ is H, a metal or lower alkyl.
17 . The method of claim 16 where R and R″ are each independently a fluorine-substituted hydrocarbon radical.
18 . The method of claim 16 in which R and/or R″ is a group of the structure:
where A is an oxygen radical or a chemical bond; n is 1 to 6; Y is F or C n F 2n+1 ; b is 2 to 20, m is 0 to 6 and p is 0 to 18.
19 . A fluidic channel having interior walls with a self-assembled monolayer of an organophosphorus acid adhered directly or through an intermediate organometallic coating to the interior walls.
20 . The fluidic channel of claim 19 , which is a closed fluidic circuit.
21 . The fluidic channel of claim 19 , which is an open fluidic channel.
22 . The fluidic channel of claim 21 in which the open fluidic channel is associated with a dispensing device.
23 . The fluidic channel of claim 20 , which is associated with a radiator.
24 . The fluidic channel of claim 19 , which is made from metal.
25 . The fluidic channel of claim 24 , which is made from iron.
26 . The fluidic channel of claim 24 , which is a metal alloy.
27 . The fluidic channel of claim 24 , which is stainless steel.
28 . The fluidic channel of claim 19 in which the self-assembled monolayer is chemically bonded to the metal.
29 . The fluidic channel of claim 19 in which the organophosphorus acid is adhered to the intermediate organometallic layer.
30 . The fluidic channel of claim 29 in which the organometallic layer is a polymeric metal oxide having unreacted alkoxide and/or hydroxyl groups.
31 . The fluidic channel of claim 19 , which is a polymeric material.
32 . The fluidic channel of claim 29 in which the self-assembled monolayer is chemically bonded to the organometallic layer.
33 . The fluidic channel of claim 19 in which the organophosphorus acid is an organophosphonic acid.
34 . The fluidic channel of claim 19 in which the organophosphorus acid is an organophosphonic acid or derivative thereof comprising a compound or a mixture of compounds of the structure:
wherein x is 0 to 1, y is 1, z is 1 to 2 and x+y+z=3; R and R″ are each independently a hydrocarbon or substituted hydrocarbon radical having a total of 1 to 30 carbon atoms or an oligomeric group, R′ is H, a metal or lower alkyl.
35 . The fluidic channel of claim 34 where R and R″ are each independently a fluorine-substituted hydrocarbon radical.
36 . The fluidic channel of claim 34 in which R and/or R″ is a group of the structure:
where A is an oxygen radical or a chemical bond; n is 1 to 6; Y is F or C n F 2n+1 ; b is 2 to 20, m is 0 to 6 and p is 0 to 18.