Surface and its manufacture and uses

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 59/14 (2006.01) B01L 3/00 (2006.01) C12N 5/00 (2006.01) G01N 21/64 (2006.01)

Patent

CA 2367736

A method for rendering a surface covered by a polymer material (plastics) more hydrophilic by treatment in a gas plasma of a non-polymerizable gas. The method is characterized in that the intensity of the plasma is selected so that the surface becomes permanently more hydrophilic. A naked plasma treated surface of plastics having an immediate water-contact angle <= 30~, such as <= 20~, said water-contact angle being changed less than .plusmn. 20 % and/or less than .plusmn. 5~ upon washing with ethanol/water mixture (70 % w/w). A kit comprising (a) a microfabricated device comprising a surface (i) which is manufactured from a synthetic polymer material (plastics) and (ii) on which there are at least one chamber and/or at least one channel, and (b) a fluorescent substance to be detected in the device. The kit is characterized in that the plastics has a fluorescence that is non-significant with respect to the fluorescence of the substance at the wavelength at which the substance fluoresces. A microfabricated device having a liquid transportation system which is formed in/on a polymer material (plastics) that is a polymerised aliphatic monomer containing unsaturation.

Cette invention concerne un procédé qui permet de rendre une surface couverte d'un matériau polymère (plastique) plus hydrophile, et qui consiste à la traiter dans un plasma d'un gaz non polymérisable. Ce procédé se caractérise en ce que l'intensité du plasma est choisie de manière que la surface devienne plus hydrophile de manière permanente. Cette invention concerne également une surface de plastique nue et traitée au plasma qui possède un angle immédiat de contact à l'eau <= 30·, par exemple un angle <= 20·, lequel angle se modifie de moins de .plusmn. 20 % et/ou de moins de ? 5· lors d'un lavage avec un mélange éthanol/eau (70 % en poids en poids). Cette invention concerne en outre un kit comprenant (a) un dispositif microfabriqué qui comprend à son tour une surface (i) fabriquée à partir d'un matériau polymère synthétique (plastique), surface sur laquelle se trouve (ii) au moins une chambre et/ou au moins un canal. Ce kit comprend également (b) une substance fluorescente devant être détectée dans le dispositif. Ce kit se caractérise en ce que le plastique possède une fluorescence insignifiante par rapport à celle de la substance à la longueur d'onde où cette dernière émet. Cette invention concerne enfin un dispositif microfabriqué comprenant un système de transport liquide qui est formé dans/sur un matériau polymère (plastique) qui consiste en un monomère aliphatique polymérisé présentant une insaturation.

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