Method of fabrication of porous macromolecular materials having an internal lining and materials obtained by means of said method
AssigneeCommissariat a l'Energie Atomique
InventorsJoseph Marchand, Jean-Rene' Puig
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Abstract
The method of fabrication of porous macromolecular materials which are primarily intended for use as ion-exchange membranes and selective semi-permeable membranes consists in subjecting a polymer to irradiation with heavy nuclear particles, in chemically fixing a monomer having at least one ethylene double bond in the zones which are modified by irradiation and localized around the locus of passage of each particle and in forming the pore structure by means of a chemical attacking agent which is specific to the starting polymer.
Claims17
A method for producing porous macromolecular material from a polymer consisting of a polyolefin, comprising
- irradiating the polyolefin with heavy nuclear particles, whereby the polyolefin is modified in the region along the path of the nuclear particles to make it more reactive to attack in the region along the path by a chemical attacking agent selected from the group consisting of strong oxidizers and strong bases, and additionally to make it more reactive towards monomers having at least one ethylene double bond;
- reacting said modified polyolefin with said chemical attacking agent, whereby a portion of the modified polyolefin is removed forming a pore structure in and through said polyolefin;
- and
- reacting the polyolefin at the modified portion, with a monomer having at least one ethylene double bond, whereby the monomer is fixed to at least a portion of the modified polyolefin.
Dependencies are inferred from the claim text.