Patents by Inventor Kazi Sadman

Kazi Sadman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200164317
    Abstract: Methods for making porous polyelectrolyte complex (PEC) films are provided. In an embodiment, such a method comprises coating the surface of a substrate with a polyelectrolyte (PE) coacervate mixture, the PE coacervate mixture comprising a cationic polymer, an anionic polymer, water, and a salt, the PE coacervate having a salt concentration; exposing the coating to an aqueous medium having another salt concentration, for a time to induce solidification of polyelectrolyte complexes (PECs) in the form of a PEC film having pores distributed throughout, wherein a difference ??C-M #191 between the salt concentration of the PE coacervate mixture and the salt concentration of the aqueous medium is selected to achieve a predetermined porosity for the porous PEC film.
    Type: Application
    Filed: May 9, 2018
    Publication date: May 28, 2020
    Applicant: Northwestern University
    Inventors: Kenneth R. SHULL, Kazi SADMAN, Qifeng WANG
  • Patent number: 10604648
    Abstract: Methods for forming a polyelectrolyte complex (PEC) film are provided. In embodiments, the method comprises applying a potential between a working electrode and a counter electrode, the electrodes in contact with an aqueous polyelectrolyte solution characterized by a bulk pH. The aqueous polyelectrolyte solution comprises a pH sensitive PEC pair comprising an unmodified anionic polymer and a cationic species, an electrochemical pH agent other than water, and a salt. The applied potential induces an electrochemical reaction of the electrochemical pH agent to generate OH? or H+ at the working electrode without inducing water electrolysis in the aqueous polyelectrolyte solution, thereby forming a PEC film from the unmodified anionic polymer and the cationic species on a surface of the working electrode.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 31, 2020
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Kenneth R. Shull, Kazi Sadman, Qifeng Wang
  • Publication number: 20180237632
    Abstract: Methods for forming a polyelectrolyte complex (PEC) film are provided. In embodiments, the method comprises applying a potential between a working electrode and a counter electrode, the electrodes in contact with an aqueous polyelectrolyte solution characterized by a bulk pH. The aqueous polyelectrolyte solution comprises a pH sensitive PEC pair comprising an unmodified anionic polymer and a cationic species, an electrochemical pH agent other than water, and a salt. The applied potential induces an electrochemical reaction of the electrochemical pH agent to generate OH? or H+ at the working electrode without inducing water electrolysis in the aqueous polyelectrolyte solution, thereby forming a PEC film from the unmodified anionic polymer and the cationic species on a surface of the working electrode.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Inventors: Kenneth R. Shull, Kazi Sadman, Qifeng Wang