Polyaniline membranes, uses, and methods thereto

Patent metadata

Field	Value
Publication number	US-10265662-B2
Application number	US-201314434266-A
Country	US
Kind code	B2
Filing date	Oct 11, 2013
Priority date	Oct 12, 2012
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

Disclosed herein are methods of increasing the hydrophilicity of a membrane. Membranes comprising polyaniline or co-polymer thereof and one or more gel inhibiting agents are treated with one or more hydrophilicity restoration agents, thereby increasing the hydrophilicity of a membrane. Also disclosed are membranes produced by the disclosed methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

First claim

What is claimed is:

1. A method of increasing membrane hydrophilicity comprising:
a) providing a membrane comprising polyaniline, a polyaniline derivative, or copolymer thereof and one or more gel inhibiting agents comprising a primary amine, a secondary amine, or a tertiary amine, or a combination thereof;
b) treating the membrane with one or more hydrophilicity restoration agents selected from organic sulfonic acids in an amount and for a time sufficient to increase the hydrophilicity of the membrane; and
c) treating the membrane in order to remove all of the organic sulfonic acid.

2. The method of claim 1 , wherein the one or more gel inhibiting agents comprises 4-methylpiperidine, n-Butylamine, 2,5-dimethyl-3-pyrroline, 3,3-dimethylpiperidine, heptamethyleneimine, diisopropylamine, hexamethyleneimine, N-ethylbenzylamine, piperazine, 2,6-dimethylmorpholine, piperidine, dibutylamine, N-methylpiperidine, N,N′-dimethylpiperazine, triethylamine, or diethylnicotinamide, or a combination thereof.

3. The method of claim 1 , wherein the one or more hydrophilicity restoration agents comprises (+/−) camphor-10-sulfonic acid, methane sulfonic acid, ethane sulfonic acid, propanesulfonic acid, perfluoropropanesulfonic acid, butane sulfonic acid, perfluorobutane sulfonic acid, hexane sulfonic acid, perfluorohexane sulfonic acid, perfluorooctanesulfonic acid, benzene sulfonic acid, toluene sulfonic acid, dodecyl benzene sulfonic acid, taurine, homotaurine, naphthalene sulfonic acid, 2,5-naphthalene disulfonic acid, dinonylnaphthalene sulfonic acid, dinonylnaphthalene disulfonic acid, polyvinylsulfonate, or polystyrenesulfonate, or a combination thereof.

4. The method of claim 1 , wherein the one or more hydrophilicity restoration agents comprises (+/−) camphor-10-sulfonic acid.

5. The method of claim 1 , wherein the membrane has a positive value of ΔG 131 IF of at least 5 mJ/m 2 after treatment.

6. The method of claim 1 , wherein the membrane has a positive value of ΔG 131 IF after treatment.

7. The method of claim 1 , wherein the membrane has a positive value of ΔG 132 IF as measured against silica, polyethylene glycol (PEG), human serum albumin (HSA), E. coli, S. cerevisiae , or P. putida after treatment.

8. The method of claim 1 , wherein step c) treating the membrane to remove all organic sulfonic acid is performed with NH 4 OH.

Assignees

• Univ California

Inventors

• Hoek Eric M V
• Kaner Richard B
• Guillen Gregory R
• Farrell Thomas P

Classifications

• C08L79/02

  Polyamines · CPC title

• C08K5/17

  Amines; Quaternary ammonium compounds · CPC title

• C08G73/0266

  Polyanilines or derivatives thereof · CPC title

• B01D67/0093

  Chemical modification · CPC title

• B01D61/18

  Apparatus therefor · CPC title