The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2015
Filed:
Mar. 13, 2013
The Uab Research Foundation, Birmingham, AL (US);
The Us Army Corp of Engineers, Champaign, IL (US);
Eugenia P. Kharlampieva, Birmingham, AL (US);
Veronika Koziovskaya, Birmingham, AL (US);
Yun Wang, Birmingham, AL (US);
Donald Cropek, Champaign, IL (US);
Imee Arcibal, Champaign, IL (US);
The UAB Research Foundation, Birmingham, AL (US);
The United States of America as Represented by the Secretary of the Army, Washington, DC (US);
Abstract
A novel type of ultrathin cationic hydrogel coatings are provided that have high, quick and reversible swelling/shrinkage transitions and surface wettability in response to pH changes. The poly(4-vinyl pyridine) (PVP) hydrogel films are produced by selective cross-linking of PVP copolymers in layer-by-layer (LbL) films assembled by spin-assisted method. These multilayer hydrogels exhibit drastic and reversible 10-fold swelling when the pH is changed from neutral to acidic. The swelling amplitude of these coatings is controlled by varying cross-link densities within the films. The pH-responsive hydrogels open new prospects for developing 'intelligent' materials with sharp stimuli-triggered responses for applications in sensing, transport regulation, and self-cleaning coatings.