Modified membranes
First Claim
1. A porous polymeric membrane formed from a blend of a polymeric membrane forming material and an anhydride as a reactivity modifying agent adapted to modify at least one surface active property of the porous polymeric membrane relative to a porous polymeric membrane formed from the polymeric membrane forming material without said anhydride.
9 Assignments
0 Petitions
Accused Products
Abstract
A porous polymeric membrane formed from a blend of a polymeric membrane forming material, such as polyvinylidene fluoride or polysulfone and a polymeric reactivity modifying agent adapted to modify the surface active properties of the porous polymeric membrane. The reactivity modifying agent is preferably a linear polymeric anhydride, such as poly(alkyl vinyl ether/maleic anhydride). The surface activity modifications include modification of the hydrophilicity/hydrophobicity balance of the membrane, or hydrolysis followed by reaction with a polyamine to form a crosslinked polyamide layer. Such modified membranes have use as reverse osmosis membranes.
169 Citations
27 Claims
- 1. A porous polymeric membrane formed from a blend of a polymeric membrane forming material and an anhydride as a reactivity modifying agent adapted to modify at least one surface active property of the porous polymeric membrane relative to a porous polymeric membrane formed from the polymeric membrane forming material without said anhydride.
Specification