Title: Nanostructured polyelectrolytes for ion-selective membranes

Abstract

Nanostructured polyelectrolyte bilayers deposited by Layer-by-Layer deposition on nanoporous membranes can be selectively crosslinked to modify the polyelectrolyte charge density and control ionic selectivity independent of ionic conductivity. For example, the polyelectrolyte bilayer can comprise a cationic polymer layer, such as poly(ethyleneimine), and an anionic polymer layer, such as poly(acrylic acid). Increasing the number of bilayers increases the cation selectivity when the poly(ethyleneimine) layer is crosslinked with glutaraldehyde. Crosslinking the membranes also increases the chemical and mechanical strength of the polyelectrolyte films. This controllable and inexpensive method can be used to create ion-selective and mechanically robust membranes on porous supports for a wide range of applications.

Inventors:

Small, Leo J.; Percival, Stephen J.; Spoerke, Erik David

Issue Date:

2020-09-08

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1735220

Patent Number(s):

10766005

Application Number:

16/128,081

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2323/30 - Cross-linking
B01D2325/14 - Membrane materials having negatively charged functional groups
B01D2325/16 - Membrane materials having positively charged functional groups
B01D2325/42 - Ion-exchange membranes
B01D61/445 - {with bipolar membranes
B01D61/46 - Apparatus therefor
B01D69/02 - characterised by their properties
B01D69/12 - Composite membranes
B01D69/125 - {In-situ manufacturing by polymerisation, polycondensation, cross-linking, and/or reaction}
B01D71/40 - Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
B01D71/60 - Polyamines

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J43/00 - Amphoteric ion-exchange, i.e. using ion-exchangers having cationic and anionic groups

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP

C08J2333/02 - Homopolymers or copolymers of acids
C08J2369/00 - Characterised by the use of polycarbonates
C08J2379/02 - Polyamines
C08J2433/02 - Homopolymers or copolymers of acids
C08J2479/02 - Polyamines
C08J3/245 - {Differential crosslinking of one polymer with one crosslinking type, e.g. surface crosslinking}
C08J5/2256 - {based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds, e.g. obtained by polycondensation}
C08J5/2287 - {After-treatment}
C08J7/042 - {with two or more layers, where at least one layer of a composition contains a polymer binder}

C - CHEMISTRY C09 - DYES C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS

C09D133/04 - Homopolymers or copolymers of esters {
C09D179/02 - Polyamines

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DOE Contract Number:  

NA0003525

Resource Type:

Patent

Resource Relation:

Patent File Date: 09/11/2018

Country of Publication:

United States

Language:

English

Subject:

77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE