Method of producing membranes for filtration modules which are intended, for example, for water treatment
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United States of America Patent
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Issued Date -
Oct 12, 2006
app pub date -
Jan 26, 2004
filing date -
Jan 29, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
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 DEG C, by soaking said membrane in a crosslinking agent employing a radical mechanism.
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