US 11,724,234 B2
Multilayer thin film nanocomposite membranes prepared by molecular layer-by-layer assembly
Rajesh Sahadevan, Dakota Dunes, SD (US); Todd J. Menkhaus, Dakota Dunes, SD (US); and Hao Fong, Dakota Dunes, SD (US)
Assigned to SOUTH DAKOTA BOARD OF REGENTS, Pierre, SD (US)
Appl. No. 16/329,653
Filed by SOUTH DAKOTA BOARD OF REGENTS, Pierre, SD (US)
PCT Filed Aug. 31, 2016, PCT No. PCT/US2016/049727
§ 371(c)(1), (2) Date Feb. 28, 2019,
PCT Pub. No. WO2018/044298, PCT Pub. Date Mar. 8, 2018.
Prior Publication US 2019/0193033 A1, Jun. 27, 2019
Int. Cl. B01D 69/12 (2006.01); B01D 69/10 (2006.01); B01D 71/56 (2006.01); B01D 69/14 (2006.01); B01D 67/00 (2006.01)
CPC B01D 69/125 (2013.01) [B01D 67/0079 (2013.01); B01D 69/10 (2013.01); B01D 69/12 (2013.01); B01D 69/148 (2013.01); B01D 71/56 (2013.01); B01D 2323/26 (2013.01); B01D 2323/30 (2013.01); B01D 2323/39 (2013.01); B01D 2323/40 (2013.01); B01D 2325/02 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of preparing a composition comprising:
obtaining a support layer, wherein the support layer is a porous nanofibrous mat, matrix, scaffold, weave, or combination thereof;
coating a polymer and/or oligomer on the support layer to form a mid-layer on the support layer;
forming an outer layer on the mid-layer, wherein the outer layer consists of three to six trilayers, wherein each trilayer consists of a polyamide bilayer and laponite nanoparticles, wherein the trilayer is formed by exposing an acid chloride and diamine to the mid-layer to form the polyamide bilayer and reacting the bilayer with the laponite nanoparticles in a molecular layer-by-layer assembly, wherein the trilayers grow exponentially to provide an outer layer thickness of between about 200 nm and about 4000 nm.