This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/26540 in citations.
Please use the identifier: http://dx.doi.org/10.1002/macp.201900453 in citations.
Controlling Polymer Microfiber Structure by Micro Solution Blow Spinning
Controlling Polymer Microfiber Structure by Micro Solution Blow Spinning
Recent progress in microfluidic technology allows fabricating microfluidic devices to produce liquid microjets with unprecedented control of the jet diameter and velocity. Here it is demonstrated that microfluidic devices based on the gas dynamic virtual nozzle principle can be excellently used for...
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Personal Name(s): | Hofmann, Eddie |
---|---|
Dulle, Martin / Liao, Xiaojian / Greiner, Andreas / Förster, Stephan (Corresponding author) | |
Contributing Institute: |
Neutronenstreuung; ICS-1 Neutronenstreuung; JCNS-1 |
Published in: | Macromolecular chemistry and physics, 221 (2019) 1, S. 1900453 - |
Imprint: |
Weinheim
Wiley-VCH
2019
|
DOI: |
10.1002/macp.201900453 |
Document Type: |
Journal Article |
Research Program: |
Soft Matter, Health and Life Sciences Jülich Centre for Neutron Research (JCNS) Functional Macromolecules and Complexes |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1002/macp.201900453 in citations.
Recent progress in microfluidic technology allows fabricating microfluidic devices to produce liquid microjets with unprecedented control of the jet diameter and velocity. Here it is demonstrated that microfluidic devices based on the gas dynamic virtual nozzle principle can be excellently used for micro solution blow spinning to continuously fabricate microfibers with excellent control of the fiber diameter and the internal crystalline alignment that determines the mechanical properties. Fiber spinning experiments with small‐ and wide‐angle X‐ray scattering are combined to directly relate the macroscopic spinning conditions to the bulk and molecular structure of the resulting fibers. The elongational rate is shown as the relevant parameter that transduces the nozzle flow conditions to the local macromolecular structure and orientation, and thus the mechanical properties of the resulting fiber. It is observed that the spinning process results in very uniform microfibers with a well‐defined shish–kebab crystal structure, which evolves into an extended chain crystal structure upon plastic deformation. Thus, the presented microfluidic spinning methodology has great implications for a precisely controlled production of microfibers using miniaturized spinning devices. |