Heat-sensitive medium for separating species in a separator...

G - Physics – 01 – N

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G01N 27/447 (2006.01)

Patent

CA 2358092

The invention concerns a medium comprising an electrolyte wherein is dissolved at least an assembly of block copolymers characterised in that said block copolymers: are present in said electrolyte at a concentration level to provide said medium with the property of reversibly passing from a state of viscosity V1, obtained at a temperature T1, to a viscosity state V2 greater by at least 100 % than V1, obtained at a temperature T2, and comprise in their structure at least: two non-contiguous polymeric segments having in said electrolyte a lower critical solubility temperature (LCST) and having an average number of atoms along their skeleton more than 50; and a polymeric segment soluble in the electrolyte at temperatures T1 and T2. The invention also concerns the use of said medium for separating analytes.

La présente invention concerne un milieu comprenant un électrolyte dans lequel est dissout au moins un ensemble de copolymères blocs caractérisé en ce que lesdits copolymères blocs sont présents dans ledit électrolyte à une concentration suffisante pour conférer audit milieu la faculté de transiter réversiblement d'un état de viscosité V1, obtenu à une température T1, vers un état de viscosité V2 supérieure d'au moins 100% à V1, obtenu à une température T2 supérieure d'au moins 20 °C à T1 et comprennent dans leur structure au moins deux segments polymériques non-contigus présentant dans ledit électrolyte une LCST et possédant un nombre moyen d'atomes le long de leur squelette supérieur à 50 et un segment polymérique soluble dans l'électrolyte aux températures T1 et T2. Elle a également pour objet l'utilisation dudit milieu à des fins séparatives d'analytes.

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