Process for hydrophilizing surfaces of fluidic components...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 5/18 (2006.01) G01N 33/487 (2006.01)

Patent

CA 2504944

The invention describes processes for producing a film of a hydrophilic polymer on the inner surfaces of a fluidic component in which firstly the inner surfaces of the fluidic component are subjected to a physicochemical treatment, in particular a plasma treatment, subsequently the inner surfaces are brought into contact with a solution of the hydrophilic polymer, afterwards the polymer solution is replaced by a gaseous medium in such a manner that firstly the inner surfaces remain wetted with part of the polymer solution and finally a film of the hydrophilic polymer remains on the inner surfaces of the fluidic component by removing the solvent. The hydrophilic polymer that is used in this case has a surface wettability for aqueous solutions which is higher than the surface wettability of the inner surfaces of the fluidic component itself. In addition the invention describes fluidic components and systems as well as analytical systems on the inner surfaces of which a film of a hydrophilic polymer is at least partly present.

L'invention concerne des procédés de production d'un film d'un polymère hydrophile sur les surfaces intérieures d'un composant fluidique dans lequel, tout d'abord, les surfaces internes du composant fluidique sont soumises à un traitement physiochimique, en particulier un traitement au plasma, puis les surfaces internes sont mises en contact avec une solution de polymère hydrophile, après quoi la solution de polymère est remplacée par un milieu gazeux de sorte qu'en premier lieu, les surfaces internes restent mouillées avec une partie de la solution de polymère et, en dernier lieu, un film du polymère hydrophile reste sur les surfaces internes du composant fluidique par élimination du solvant. Le polymère hydrophile qui est utilisé en l'occurrence présente une mouillabilité de surface pour des solutions aqueuses qui est supérieure à la surface de la mouillabilité des surfaces internes du composant fluidique lui-même. En outre, l'invention concerne des composants et des systèmes fluidiques, ainsi que des systèmes analytiques sur les surfaces internes dans lesquelles un film d'un polymère hydrophile est au moins partiellement présent.

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