B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 67/00 (2006.01) B01D 61/14 (2006.01) B01D 69/02 (2006.01) B01D 71/44 (2006.01) B01D 71/68 (2006.01) B01D 71/82 (2006.01) C02F 1/00 (2006.01)
Patent
CA 2514468
The invention relates to a method of producing membranes for nanofiltration, ultrafiltration or microfiltration modules which are intended, for example, for water treatment, said membranes comprising a hydrophobic polymer material having a hydrophilic polymer material incorporated therein or deposited thereon. The invention is characterised in that it comprises the following steps consisting in: (a) cold conditioning the membrane, following the incorporation or deposition of the hydrophilic polymer material, in a solution containing ammonium, sodium or potassium persulphate; and (b) hot crosslinking the hydrophobic and hydrophilic polymer materials forming the membrane, at a temperature greater than 60 ·C, by soaking said membrane in a crosslinking agent employing a radical mechanism.
Procédé de fabrication de membranes pour modules de nanofiltration, ultrafiltration ou microfiltration notamment pour le traitement des eaux, comportant un matériau polymère hydrophobe auquel on incorpore, ou sur lequel on dépose, un matériau polymère hydrophile, caractérisé en ce qu~il comporte les étapes suivantes : a) on conditionne, à froid, la membrane, après incorporation ou dépôt du matériau polymère hydrophile, dans une solution contenant du persulfate de potassium, de sodium ou d~ammonium et b) on effectue une réticulation à chaud, à une température supérieure à 60~C, des matériaux polymères hydrophiles et hydrophobes constituant la membrane, en trempant cette dernière dans un agent de réticulation agissant par mécanisme radicalaire.
Aquasource
Goudreau Gage Dubuc
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