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50PEO20 – 3 wt% 20 wt% 2.2 Solution testing equipment A rotating viscometer (Brookfield, DV-II) was used for viscosity measurements of prepared solutions. Results were taken at the same shearing rates. The electric conductivity was tested with a conductivity meter (Mettler Toledo), at 22°C temperature and 35% relative humidity. The mean value of five measurements is presented as a result. 2.3 Electrospinning The photograph of conventional electrospinning setup used for production of nanofiber mats is shown in Figure 2 . The polymer solution was contained in a

/11. (2011) 865–875. https://doi.org/10.1016/j.resconrec.2011.04.009 [4] Oromiehie A., Mamizadeh A.: Recycling PET beverage bottles and improving properties . Polymer International, 53/6. (2004) 728–732. https://doi.org/10.1002/pi.1389 [5] Veleirinho B., Rei M. F., Lopes-Da-Silva J. A.: Solvent and concentration effects on the properties of electrospun poly(ethylene terephthalate) nanofiber mats. Journal of Polymer Science, Part B: Polymer Physics, 46/5. (2008) 460–471. https://doi.org/10.1002/polb.21380 [6] G. Li, Y. Zhao, M. Lv, Y. Shi, D. Cao: Super hydrophilic

-Development by Pressure 0/ Polar Electricity in Hemihedral Crystals with Inclined Faces , Acad. Sci.(Paris) C. R. Hebd. Seances, 91, 294 (in French). 5. Documentation for ANSYS, Coupled-Field Analysis Guide (2010). 6. Dunsch R., Breguet J.M. ( 2006), Unified mechanical approach to piezoelectric bender modelling, Sens. Actu. 134, 2, 436–446. 7. Fertis D.G. (1996), Advanced Mechanics of Structures , Marcel Dekker, New York. 8. Liu X., Wang X., Zhao H., Du Y. (2014), Myocardial cell pattern on piezoelectric nanofiber mats for energy harvesting, J. Phys: Conf. Ser . 557

.1007/s12649-019-00590-4. 4. Cho, M., Ko, F.K. & Renneckar, S. (2019). Impact of thermal oxidative stabilization on the performance of lignin-based carbon nanofiber mats. ACS Omega, 4(3), 5345–5355. DOI: 10.1021/acsomega.9b00278. 5. Liqing, W. & Armando, M.D. (2016). A review on grafting of biofibers for biocomposites. Materials, 9(4), 303. DOI: 10.3390/ma9040303. 6. Pishnamazi, M., Casilagan, S., Clancy, C., Shirazian, S., Iqbal, J., Egan, D. & Collins, M.N. (2018). Microcrystalline Cellulose, Lactose and Lignin Blends: Process Mapping of Dry Granulation Via Roll

Polyacrylonitrile Foam The Nature of Platinum~Support Interactions. Journal of the Electrochemical Society 144 (1997) 90-95. 20. Wang, J., Luo, C., Qi, G., Pan, K., Cao, B.: Mechanism study of selective heavy metal ion removal with polypyrrole-functionalized polyacrylonitrile nanofiber mats. Applied Surface Science 316 (2014) 245-250. 21. Bartelmess, J., Giordani, S.: Carbon nano-onions (multi-layer fullerenes): chemistry and applications. Beilstein Journal of Nanotechnology 5 (2014) 1980. 22. Yang, Y., Daniels, E.S., Klein, A.: Synthesis of polyacrylonitrile/polystyrene latex

emulsion electrospinning based on green chemical, J. Appl. Polym. Sci . 132 (2015) 41811: https://doi.org/10.1002/app.41811 62. Q. P. Pham, U. Sharma and A. G. Mikos, Electrospun poly(e-caprolactone) microfiber and multilayer nanofiber/microfiber scaffolds: characterization of scaffolds and measurement of cellular infiltration, Biomacromolecules 7 (2006) 2796–2805; https://pubs.acs.org/doi/abs/10.1021/bm060680j 63. L. Ghasemi-Mobarakeh, D. Semnani and M. Morshed, A novel method for porosity measurement of various surface layers of nanofibers mat using image

, the surface charge density of the spinning jet increases, and finally, the fiber diameter decreases due to the increase in the splitting frequency of the jet. Figure 10 SEM images of PEO nanofiber mats fabricated by the CSBS system at the DC: (a) 5 cm, (b) 10 cm, (c) 15 cm, (d) 20 cm, and (e) 25 cm Figure 11 Relationship between DC and the fiber diameter 4.3 Effect of voltage on the nanofiber diameters Scanning electron microscopy images of CSBS fiber formations obtained at voltages of 4, 6, 8, 10, and 12 kV are shown in Figure 12 (a)–(e) , respectively. The