Strong size-dependent stress relaxation in electrospun polymer nanofibers
- Univ. of California, San Diego, La Jolla, CA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Here, electrospun polymer nanofibers have garnered significant interest due to their strong size-dependent material properties, such as tensile moduli, strength, toughness, and glass transition temperatures. These properties are closely correlated with polymer chain dynamics. In most applications, polymers usually exhibit viscoelastic behaviors such as stress relaxation and creep, which are also determined by the motion of polymer chains. However, the size-dependent viscoelasticity has not been studied previously in polymer nanofibers. Here, we report the first experimental evidence of significant size-dependent stress relaxation in electrospun Nylon-11 nanofibers as well as size-dependent viscosity of the confined amorphous regions. In conjunction with the dramatically increasing stiffness of nano-scaled fibers, this strong relaxation enables size-tunable properties which break the traditional damping-stiffness tradeoff, qualifying electrospun nanofibers as a promising set of size-tunable materials with an unusual and highly desirable combination of simultaneously high stiffness and large mechanical energy dissipation.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1421770
- Alternate ID(s):
- OSTI ID: 1361718
- Journal Information:
- Journal of Applied Physics, Vol. 121, Issue 1; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Shell Architecture Strongly Influences the Glass Transition, Surface Mobility, and Elasticity of Polymer Core-Shell Nanoparticles
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journal | July 2019 |
Thermal transport in electrospun vinyl polymer nanofibers: effects of molecular weight and side groups
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journal | January 2018 |
High thermal conductivity and superior thermal stability of amorphous PMDA/ODA nanofiber
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journal | May 2018 |
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