title: Stimuli-Responsive Self-Immolative Polymer Nanofiber Membranes Formed by Coaxial Electrospinning.
abstract: The first self-immolative polymer (SIP) nanofiber membrane is demonstrated in this report, in which the immolation can be triggered by external stimulus. Electrospun SIP/polyacrylonitrile (PAN) fibers provide depolymerization that is ∼25 times quicker and more responsive (i.e., immolation) than that of a cast film in the triggering condition. Depolymerization of SIP in the SIP/PAN blended fiber membrane results in the transition of the surface properties from hydrophobic (∼110°) to hygroscopic (∼0°). Triggered release of encapsulated functional molecules was demonstrated using coaxially electrospun fiber membrane made of a SIP/PAN blend sheath and polyvinylpyrrolidone/dye core. Coaxial fibers with the SIP/PAN sheath provide minimal release of the encapsulated material in nontriggering solution, while it releases the encapsulated material instantly when the triggering condition is met. Its versatility has been strengthened compared to that of non-SIP coaxial fibers that provide no triggering reaction by external stimulus.
authors.affiliation: Nanoelectronics Laboratory, Department of Electrical Engineering and Computing Systems, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Daewoo
authors.initials: D
authors.lastname: Han
authors.affiliation: Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Xinjun
authors.identifier: http://orcid.org/0000-0002-4324-7332
authors.initials: X
authors.lastname: Yu
authors.affiliation: Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Qinyuan
authors.initials: Q
authors.lastname: Chai
authors.affiliation: Department of Chemistry, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Neil
authors.initials: N
authors.lastname: Ayres
authors.affiliation: Nanoelectronics Laboratory, Department of Electrical Engineering and Computing Systems, University of Cincinnati , Cincinnati, Ohio 45221, United States.
authors.forename: Andrew J
authors.identifier: http://orcid.org/0000-0002-1868-4442
authors.initials: AJ
authors.lastname: Steckl
keywords: coaxial electrospinning; nanofiber; self-immolative polymer; stimuli-responsive polymer; triggered release