Mechanical performance of laminated composites incorporated with nanofibrousmembranesGraduate School of Engineering, Shinshu University
Master’s degree Osamu Ohsawa
Study on the Poly(ether ketone)(PK) nanofibrous membrane via electrospinning
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Reserch Topics
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Poly(ether ketone)
very low permaeability
CYBERLONTM
Electrospinning & Gel-spinning
Features & Applications of Nanofiber Web
3D structure of E-spun fibers
Large surface area
Small pore size
2003, 63, 2223.
Solution properties
→ Viscosity (centipoise)
→ Conductivity (μS/cm)
→ Applied voltage
→ Tip-to-collector distance
Ambient parameters
→ Temperature, Humidity
Electrospinning parameters
Experimental
Materials
Applied voltage: 10kV
Solution properties & Morphologies
Effect of concentration
Effect of mixture solvent
Time dependence of PK solution
0h
5h
10h
24h
0h
5h
10h
24h
2μm
2μm
2μm
2μm
Crystal structure
α form
β form
a ()
b ()
c ()
WAXD
DSC
Raman
1000
1200
1400
1600
1800
1350
1400
1450
Wavenumber(cm
-1
FT-IR
4000
3500
3000
2500
2000
1500
1000
500
Transmittance (%)
Conclusion
PK nanofibers have been successfully electrospun from the solution.
The optimized concentration and mixture solvent ratio of the solution for electrospinning were 12wt% and TFA/MC (40/60,w/w), respectively.
Different crystalline forms of electrospun PK fiber and solvent cast PK film were confirmed by XRD, FT-IR, and Raman spectroscopy.
Solvent cast PK film showed completely α-form, while electrospun PK
fiber showed β-form, suggesting the different crystallization kinetics and stress induced crystalline transformation during electrospinning and solvent casting process.
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Thank you for your attentions!!
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WAXD
0
10
20
30
40
50
Intensity
4000
3500
3000
2500
2000
1500
1000
5
FT-IR
Transmittance (%)
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