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20180323 electrospinning and polymer nanofibers
- 1. Electrospinning and Polymer Nanofibers Chem6564 Guest Lecture #2 Tianyu Liu Postdoctoral Associate Department of Chemistry 03/22/2018
- 2. Outline Fundamentals Background Experimental setup Electrospinning Critical Parameters Solutionproperties Injection rate Applied voltage Collectors etc. Examples of State-of- the-Art Applications
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- 4. What is electrospinning? Needle CollectorHighvoltage supply Polymer solution Liquid jet The experimental setup A technique that can manufacture nanofibers
- 5. What is electrospinning? HHS 3002
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- 7. Natural Nanofibers... silk fibroinnanofibers chitosan nanofibers collagen nanofibers hyaluronic acid nanofibers gelatin nanofibers fibrinogen nanofibers
- 8. Synthetic polymer nanofibers TUyar et al., Polymer 2009, 50, 475. polyacrylonitrile nanofibers polystyrene nanofibers Poly(vinyl alcohol) nanofibers cellulose acetate nanofibers polyacrylamide nanofibers poly(methyl methacrylate) nanofibers
- 9. Block Copolymer Nanofibers PMMA-b-PSnanofibers Mol. Syst. Des. Eng. 2018, DOI: 10.1039/C7ME00122C * * N O O m n
- 10. Ceramic Nanofibers Nanoscale, 2010,2, 1670–1673 Zirconia nanofibers TiC nanofibers Science 2004, 304, 1917
- 11. Composite Nanofibers Nanotechnology 2008,19, 195303; Adv. Mater. 2004, 14, 16. CNFs/Pd nanoparticles CNFs/CNTs CNFs/Graphene/Ni nanoparticles CNFs/PANI nanorodes anatase nanofibers/Au nanoparticles Ag nanoparticles
- 12. Polymer Nanofibers Greiner,A. etal., Angew. Chem. Int. Ed., 2007. 46, 5670-5703 Nanomaterials
- 13. History Best And GreenEnergy EFFicient technologies
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- 15. Revisit Needle CollectorHigh voltage supply Polymer solution Liquidjet The experimental setup
- 16. Talyor Cone + ++ + + + + + + + + + + + + + + + + + + + + + + + + + + +
- 17. Talyor Cone (tipregion) Analyst., 2012. 137, 4150-4161Wikipedia
- 18. Whipping Jet Model- Spinning Streaming segment 1st whipping segment 2nd whipping segment 3rd whipping segment Fong H, Reneker DH. Electrospinning and the formation of nanofibers. Hanser Publishing; 2000, 225-46
- 19. Whipping Jet Model- Spinning Stereographic pictures of polyethylene oxide nanofibers during electrospinning Fong H, Reneker DH. Electrospinning and the formation of nanofibers. Hanser Publishing, 2000, 225-46
- 20. Whipping Jet Model- Spinning Greiner,A. et al., Angew. Chem. Int. Ed., 2007. 46, 5670-5703
- 21. Question Why forming acone? circular motion ω v 𝑣 = 𝜔𝑟
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- 24. #1 Concentration RSC Adv.2015, 5, 14345-14350 Poly. Degrad. Stab.. 2014, 110, 225-231 Viscosity poly(vinylidene fluoride)
- 25. #2 Viscosity http://www.absorbables.com/technical/inherent_viscosity.html poly(lactide-co-glycolide) inhexafluoroisopropanol polycaprolactone in chloroform molecular weight
- 26. #2 Viscosity Ifviscosity is too small RSC Adv. 2015, 5, 14345-14350 Bead formation
- 27. #3 Applied Voltage poly-acrylonitrile in dimethylformamide Z. Zhou et al., J. Phys. D:Appl. Phys, 2011, 44, 435401,
- 28. #3 Applied Voltage http://www.intechopen.com/books/nanofibers/preparation-of-cellulose-based-nanofibers-using-electrospinning 10kV 15 kV 20 kV 25 kV ethylcellulose nanofibers ~260 nm ~220 nm ~150 nm~160 nm
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- 30. #5 Shape ofNeedles J.Am. Chem. Soc. 2007, 129, 764-765. coaxial nozzles
- 31. #6 Needle-less (Nozzle-free)Electrospinning point to plane plane to plane
- 32. #6 Needle-less (Nozzle-free)Electrospinning Elmarco NanospiderTM technology www.elmarco.com
- 33. #7 The Collectors J.Cell. Plastics, 2014, 51, 165-196
- 34. Exercise To reduce thefiber diameter, we need to... Concentration Viscosity AppliedVoltage Injection Rate Needle-to-Plane Distance Solution Temperature Amount Out
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- 36. Applications Electrospun Nanofibers Applications inlife science • Drug delivery carrier • Antibacterial membranes • Wound dressing Tissue engineering scaffolding • Porous membranes • Tubular shapes for blood vessels and nerve regenerations • 3D scaffolds for bone and cartilage regenerations Filter media • Liquid filtration • Gas filtration • Molecule filtration Military protective clothing • Minimal impedance to air • Efficiency in trapping aerosol particles • Anti-bio-chemical gases Nano devices • Thermal sensor • Biochemical sensor • Fluorescence optical sensor Other industrial applications • High efficient and functional catalysts •Ultrahydrophobic/philic water collectors Energy conversion and storage • Supercapacitor electrodes • Photovoltaic devices • Battery electrodes • Separators Nanocomposites • Polymer composites with nanofiber- reinforced interfaces • Lightweight nanofiber composites • Nanofiber reinforced surface coatings
- 37. Number of Publications #of publication (2007-2017) # of citation (2007-2017)
- 38. Example #1 silica-carbon nanofibers forLi-ion batteries Nano Lett., 2015, 15, 3899–3906
- 39. Example #2 needless-electrospinning MnO2/CNTnanofibers ACS Appl. Energy Mater., 2018, 1, 296-300
- 40. Example #3 patterningof fiber collectors O2 plasma mask hydrophobic hydrophilic polydopamine solution polyurethane (PU) Adv. Mater. Interfaces, 2018, 5, 1701204
- 41.