Gradient membranes formed from free standing structured organic films and methods thereof
AssigneeXerox Corporation
InventorsValerie M. Farrugia, Shivanthi Easwari Sriskandha, Matthew A. Heuft
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Abstract
A structured organic film (SOF) is disclosed. The structured organic film includes a plurality of segments, a plurality of linkers, and a plurality of capping segments. The structured organic film also includes a first surface of the SOF. The film also includes a parallel second surface of the SOF connected to the first surface by a thickness of the SOF, where a segment to capping segment ratio is greater at the first surface as compared to the parallel second surface. A membrane including a free-standing film comprised of a structured organic film is also disclosed.
Claims18
A structured organic film (SOF), comprising:
- a plurality of segments;
- a plurality of linkers;
- a plurality of capping segments;
- a first surface of the SOF;
- and
- a parallel second surface of the SOF connected to the first surface by a thickness of the SOF, wherein:
- a segment to capping segment ratio is greater at the first surface as compared to the parallel second surface;
- and
- at least one of the plurality of capping segments comprises:
A membrane, comprising:
- a free standing film comprising a first surface and a second surface, comprising:
- a plurality of segments;
- a plurality of linkers;
- and
- a plurality of capping segments;
- and
- wherein at least one of the plurality of capping segments comprises:
A structured organic film (SOF) membrane, comprising:
- a plurality of segments;
- a plurality of linkers;
- a plurality of capping segments comprising ionic capping segments and nonionic capping segments;
- a first surface of the SOF;
- a second surface of the SOF, wherein:
- a segment to capping segment ratio is greater at the first surface as compared to the second surface;
- and
- a concentration of ionic capping segments in the SOF is from about 0.1 to about 5.0 molar equivalents of ionic capping segments as compared to a total concentration of nonionic segments in the SOF;
- and
- at least one of the plurality of capping segments comprises:
Dependencies are inferred from the claim text.