Functional porous multilayer fibre and its preparation

D - Textiles – Paper – 01 – D

Patent

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Details

D01D 5/247 (2006.01) D01D 5/06 (2006.01) D01D 5/24 (2006.01) D01D 5/34 (2006.01) D01F 1/10 (2006.01)

Patent

CA 2577727

The invention relates to a hollow or solid fibre having multiple porous layers concentrically arranged, and wherein at least one of the layers comprises functionalized or active particles that are well accessible and maintain their function after preparation. The layer containing high loads of particles can be either the outer or the inner layer. The main function of the other porous layer is to provide mechanical stability to the fibre. It can further act as a sieve and prevent unwanted compounds or species to come in contact with the functionalized particulate matter. Where it is the inner layer, the second layer can advantageously be a biocompatible material. With the second being the outer layer it is now possible to reach a particle content of 100 wt % in the inner layer. These fibres comprising high densities of functionalized particulate matter and of still sufficient mechanical strength can be used for (selective) adsorption, conversion, isolation or purification of compounds from a mixture of compounds, in particular from a fermentation broth, tissue broth, plant broth, cell broth or blood.

L~invention porte sur une fibre creuse ou solide comportant de multiples couches poreuses disposées de manière concentrique et où au moins une des couches comporte des particules fonctionnalisées ou actives parfaitement accessibles et conservant leur fonction après la fabrication. La couche contenant des quantités importantes de particules peut être la couche externe ou la couche interne. La fonction principale de l~autre couche poreuse est d~assurer la stabilité mécanique de la fibre. Elle peut en outre faire office de crible et empêcher les composés ou produits indésirables de venir au contact de la matière particulaire fonctionnalisée. Lorsqu~il s~agit de la couche interne, la seconde couche peut avantageusement être un matériau biocompatible. La seconde couche étant la couche externe, il est maintenant possible d~atteindre une teneur particulaire de 100 % en poids dans la couche interne. Ces fibres qui comprennent des densités élevées de matière particulaire fonctionnalisée et qui sont de résistance mécanique encore suffisante peuvent être utilisées (de manière sélective) pour l~adsorption, la conversion, l~isolation ou la purification de composés à partir d~un mélange de composés, en particulier à partir d~un bouillon de fermentation, d~un bouillon de tissus, d~un bouillon de plantes, d~un bouillon de cellules ou de sang.

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