Formation of Core-Sheath Polymer Fibers by Free Surface Spinning of Aqueous Two-Phase Systems

Swomitra Palit; Laurent Kreplak; John P. Frampton

doi:10.1021/acs.langmuir.1c03472

Formation of Core-Sheath Polymer Fibers by Free Surface Spinning of Aqueous Two-Phase Systems

Swomitra Palit, Laurent Kreplak, John P. Frampton

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Core-sheath fibers have numerous applications ranging from composite materials for advanced manufacturing to materials for drug delivery and regenerative medicine. Here, a simple and tunable approach for the generation of core-sheath fibers from immiscible solutions of dextran and polyethylene oxide is described. This approach exploits the entanglement of polymer molecules within the dextran and polyethylene oxide phases for free surface spinning into dry fibers. The mechanism by which these core-sheath fibers are produced after contact with a solid substrate (such as a microneedle) involves complex flows of the phase-separating polymer solutions, giving rise to a liquid-liquid core-sheath flow that is drawn into a liquid bridge. This liquid bridge then elongates into a core-sheath fiber through extensional flow as the contacting substrate is withdrawn. The core-sheath structure of the fibers produced by this approach is confirmed by attenuated total reflection Fourier-transform infrared spectroscopy and confocal microscopy. Tuning of the core diameter is also demonstrated by varying the weight percentage of dextran added to the reservoir from which the fibers are formed.

Original language	English
Pages (from-to)	4617-4624
Number of pages	8
Journal	Langmuir
Volume	38
Issue number	15
DOIs	https://doi.org/10.1021/acs.langmuir.1c03472
Publication status	Published - Apr 19 2022

Bibliographical note

Funding Information:
This work was supported by funds from the Canada Research Chairs Program (J.P.F.), Canada Foundation for Innovation (J.P.F., Project #33533), Natural Sciences and Engineering Research Council of Canada (J.P.F., RGPIN/04298-2016; L.K., RGPIN/03781-2018; J.P.F., RTI/000030-2020), and the New Frontiers in Research Fund (J.P.F and L.K., NFRFE/2018-00356). The authors acknowledge the use of the Dalhousie University Faculty of Medicine Cellular & Molecular Digital Imaging Facility. The authors also thank Professor Jan Rainey for his assistance in FTIR spectra acquisition. Finally, the authors acknowledge that Dalhousie University is located in Mi’kma’ki, the ancestral and unceded territory of the Mi’kmaq.

Publisher Copyright:
© 2022 American Chemical Society.

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

PubMed: MeSH publication types

Journal Article
Research Support, Non-U.S. Gov't

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10.1021/acs.langmuir.1c03472

Cite this

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title = "Formation of Core-Sheath Polymer Fibers by Free Surface Spinning of Aqueous Two-Phase Systems",

abstract = "Core-sheath fibers have numerous applications ranging from composite materials for advanced manufacturing to materials for drug delivery and regenerative medicine. Here, a simple and tunable approach for the generation of core-sheath fibers from immiscible solutions of dextran and polyethylene oxide is described. This approach exploits the entanglement of polymer molecules within the dextran and polyethylene oxide phases for free surface spinning into dry fibers. The mechanism by which these core-sheath fibers are produced after contact with a solid substrate (such as a microneedle) involves complex flows of the phase-separating polymer solutions, giving rise to a liquid-liquid core-sheath flow that is drawn into a liquid bridge. This liquid bridge then elongates into a core-sheath fiber through extensional flow as the contacting substrate is withdrawn. The core-sheath structure of the fibers produced by this approach is confirmed by attenuated total reflection Fourier-transform infrared spectroscopy and confocal microscopy. Tuning of the core diameter is also demonstrated by varying the weight percentage of dextran added to the reservoir from which the fibers are formed. ",

author = "Swomitra Palit and Laurent Kreplak and Frampton, {John P.}",

note = "Funding Information: This work was supported by funds from the Canada Research Chairs Program (J.P.F.), Canada Foundation for Innovation (J.P.F., Project #33533), Natural Sciences and Engineering Research Council of Canada (J.P.F., RGPIN/04298-2016; L.K., RGPIN/03781-2018; J.P.F., RTI/000030-2020), and the New Frontiers in Research Fund (J.P.F and L.K., NFRFE/2018-00356). The authors acknowledge the use of the Dalhousie University Faculty of Medicine Cellular & Molecular Digital Imaging Facility. The authors also thank Professor Jan Rainey for his assistance in FTIR spectra acquisition. Finally, the authors acknowledge that Dalhousie University is located in Mi{\textquoteright}kma{\textquoteright}ki, the ancestral and unceded territory of the Mi{\textquoteright}kmaq. Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

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Formation of Core-Sheath Polymer Fibers by Free Surface Spinning of Aqueous Two-Phase Systems

Abstract

Bibliographical note

ASJC Scopus Subject Areas

PubMed: MeSH publication types

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