Amphiphilic polymer capsules and related methods of...

B - Operations – Transporting – 01 – J

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B01J 13/00 (2006.01)

Patent

CA 2537721

Polymer capsules from amphiphilic graft copolymers comprising reactive, hydrophobic polyolefin backbones, and hydrophilic poly(ethylene glycol) (PEG) grafts are produced by self-assembly of the polymers at the oilwater interface, and crosslinking the assembly with bis-cyclooctene PEG derivatives in conjunction with ring-open metathesis polymerization catalysts. The use of the graft copolymer architecture in capsule synthesis provides significant opportunities to tune both the surface properties, in terms of recognition, and the membrane properties, in terms of mechanical strength, encapsulation, and release.

L'invention concerne des capsules polymères issues de copolymères greffés amphiphiles comprenant des squelettes de polyoléfines hydrophobes réactifs, et des greffes de poly(éthylène glycol) (PEG) hydrophiles, produites par auto-assemblage des polymères au niveau de l'interface huile-eau, et par réticulation de cet assemblage au moyen de dérivés PEG bis-cyclooctène associés à des catalyseurs de polymérisation par métathèse par ouverture de cycles. L'utilisation de l'architecture des copolymères greffés dans la synthèse de capsules permet de définir à la fois les propriétés de surface, pour ce qui est de la reconnaissance, et les propriétés de membrane, pour ce qui est de la résistance mécanique, l'encapsulation et la libération.

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