Patent ID: 9737859
Date: 2017-08-22
CPC Classifications: B01D,C02F,Y02A

Claim:
1. A process for improving water flux of a thin film composite (TFC) membrane, comprising: (a) providing at least one TFC membrane having at least a felt layer on a backside, a support layer, and a discrimination layer on a front side; (b) applying a backside treatment solution containing from about 0.1 wt % to about 33 wt % of a tertiary amine salt of camphorsulfonic acid as a pore structure protection agent to the backside of the TFC membrane to form a backside-treated TFC membrane; and (c) drying the backside-treated TFC membrane to yield a treated TFC membrane, the treated TFC membrane having a water flux that is greater than the water flux of a TFC membrane prepared without treating the backside with the backside treatment solution.