研究目的
To fabricate highly stretchable coaxial fiber conductors that can sustain large strains without change in resistance for wearable electronic systems.
研究成果
The designed highly stretchable coaxial fiber with buckled core structures can be reversibly stretched up to 680% with less than 4% change in resistance, making it suitable for applications requiring stretchability and stable electrical resistance.
研究不足
The study does not address the potential degradation of electrical and mechanical properties over long-term use or under varying environmental conditions.
1：Experimental Design and Method Selection:
The study used a combination of coaxial wet-spinning, solution stretching, and self-buckling processes to create stretchable coaxial fiber conductors.
2：Sample Selection and Data Sources:
The materials used included PEDOT/PSS aqueous dispersion, polystyrene-block-polyisoprene-block-polystyrene (TPE), and polyethylene-block-poly(ethylene glycol) (PBP).
3：List of Experimental Equipment and Materials:
Equipment included a coaxial wet-spinning assembly, SEM (Quanta 600), materials microscope (BX61), mechanical testing machine (5944), digital multimeter (1252B), and X-ray microcomputed tomography system (SkyScan 1172).
4：2). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The process involved spinning coaxial fibers, applying prestrains, drying, and releasing the strain to induce buckling.
5：Data Analysis Methods:
The electrical and mechanical properties of the fibers were analyzed using digital multimeters and mechanical testing machines, respectively.
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SEM
Quanta 600
FEI Company
Used for microstructure characterization.
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Materials microscope
BX61
Olympus Corporation
Used for optical imaging of the coaxial fibers.
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X-ray microcomputed tomography system
SkyScan 1172
Bruker
Used for 3D structure analysis of the fibers.
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PEDOT/PSS aqueous dispersion
Clevios PH1000
HC Starck, Inc.
Used as the conductive core material in the coaxial fibers.
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Polystyrene-block-polyisoprene-block-polystyrene
Sigma-Aldrich
Used as the thermoplastic elastomer sheath material.
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Polyethylene-block-poly(ethylene glycol)
Sigma-Aldrich
Added to PEDOT/PSS to increase its electrical conductivity and stretchability.
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Mechanical testing machine
5944
Instron Corporation
Used for mechanical property testing.
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Digital multimeter
1252B
Used for monitoring electrical resistance changes.
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