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Document Type : Original Article


Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.


The development of electrospun nanofibers for using in different applications requires a comprehensive understanding of the mechanical properties of a single nanofiber and nanofiber layer. Here, we studied the mechanical properties of nanofiber layer and single nanofiber of polycaprolactone (PCL)/functionalized multiwall carbon nanotubes (F-MWCNTs) composite structures. Scanning electron microscopy (SEM) showed morphology and diameter of composite nanofibers with various CNT concentrations. Moreover, the tensile testing was used for measuring mechanical properties of both nanofiber layer and single nanofibers by distinct procedures. Our results clearly showed that the mechanical properties of single nanofibers had a significant difference with those of nanofiber layer. By increasing the F-MWCNT concentration up to 3 wt%, Young’s modulus and tensile strength of the nanofiber layer increased. However, Young’s modulus and tensile strength of single nanofiber increased with addition of F-MWCNTs up to 1 wt% and further increase in concentration led to a decrease in the modulus and tensile strength of single nanofiber.Moreover, the toughness and elongation-at-break of the nanofiber layer and single nanofiber showed different trends. Taken together, considering the mechanical properties of nanofibers in different scales, help us to design an appropriate structures for various applications.


[1]  K.P. Feltz, E.A.G. Kalaf, C. Chen, R.S. Martin, and S.A. Sell, “A review of electrospinning manipulation techniques to direct fiber deposition and maximize pore sizeˮ, Electrospinning, vol. 1, no. 1, pp. 46-61, 2017. [2]  H. Kriel, M. Coates, and A. Smit, “Electrospun Fibers for Advanced Wound Care: Moving from Novel Lab-Scale Curiosities to Commercial Realitiesˮ, in Electrospinning: From Basic Research to Commercialization, 2018, pp. 95-135. [3]  J. Hu, D. Kai, H. Ye, L. Tian, X. Ding, S. Ramakrishna, and X.J. Loh, “Electrospinning of poly(glycerol sebacate)-based nanofibers for nerve tissue engineeringˮ, Mat. Sci. Eng. C, vol. 70, pp. 10891094, 2017. [4]  M.R. Casanova, R.L. Reis, A. Martins, and N.M. Neves, “Nanotechnology, Scaffolding-Related Developments and Translationˮ, in The Use of Electrospinning Technique on Osteochondral Tissue Engineering, Osteochondral Tissue Engineering, 2018, pp. 247-263. [5]  V. Mouriño, “Nanoelectrospun Matrices for Localized Drug Deliveryˮ, in Applications of Nanocomposite Materials in Drug Delivery, Elsevier, 2018, pp. 491508. [6]  A. Khalf and S.V. Madihally, “Recent advances in multiaxial electrospinning for drug deliveryˮ, Eur. J. Pharm. Biopharm., vol. 112, pp. 1-17, 2017. [7]  R. Halaui, E. Zussman, R. Khalfin, R. Semiat, and Y. Cohen, “Polymeric microtubes for water filtration by co-axial electrospinning techniqueˮ, Polym. Adv. Technol., vol. 28, no. 5, pp. 570-582, 2017. [8] H. Gao, Y. Yang, O. Akampumuza, J. Hou, H. Zhang, and X. Qin, “A low filtration resistance threedimensional composite membrane fabricated via free surface electrospinning for effective PM 2.5 captureˮ, Env. Sci. Nano, vol. 4, no. 4, pp. 864-875, 2017. [9] M. Zhang, X. Zhao, G. Zhang, G. Wei, and Z. Su, “Electrospinning design of functional nanostructures for biosensor applicationsˮ, J. Mater. Chem. B, vol. 5, no. 9, pp. 1699-1711, 2017. [10] P. Ekabutr, W. Klinkajon, P. Sangsanoh, O. Chailapakul, P. Niamlang, T. Khampieng, and P. Supaphol, “Electrospinning: a carbonized gold/graphene/PAN nanofiber for high performance biosensingˮ, Anal. 
Methods-UK, vol. 10, no. 8, pp. 874-883, 2018. [11] S. Chawla, J. Cai, and M. Naraghi, “Mechanical tests on individual carbon nanofibers reveals the strong effect of graphitic alignment achieved via precursor hot-drawingˮ, Carbon, vol. 117, pp. 208-219, 2017. [12] A. Morel, S. Domaschke, V.U. Kumaran, D. Alexeev, A. Sadeghpour, S.N. Ramakrishna, S.J. Ferguson 
 et al., “Correlating diameter, mechanical and structural properties of poly(L-lactide) fibres from needleless electrospinningˮ, Acta Biomater., vol. 81, pp. 169183, 2018. [13] K. Sakakibara, Y. Moriki, H. Yano, and Y. Tsujii, “Strategy for the improvement of the mechanical properties of cellulose nanofiber-reinforced highdensity polyethylene nanocomposites using diblock copolymer dispersantsˮ, ACS Appl. Mater. Inter., vol. 9, no. 50, pp. 44079-44087, 2017. [14] S.G. King, N.J. Terrill, A.J. Goodwin, R. Stevens, V. Stolojan, and S.R.P. Silva, “Probing of polymer to carbon nanotube surface interactions within highly aligned electrospun nanofibers for advanced compositesˮ, Carbon, vol. 138, pp. 207-214, 2018. [15] X.-L. Xie, Y.-W. Mai, and X.-P. Zhou, “Dispersion and alignment of carbon nanotubes in polymer matrix: a reviewˮ, Mater. Sci. Eng. R Rep., vol. 49, no. 4, pp. 89-112, 2005. [16] G. Mittal, V. Dhand, K.Y. Rhee, S.-J. Park, and W.R. Lee, “A review on carbon nanotubes and graphene as fillers in reinforced polymer nanocompositesˮ, J. Ind. Eng. Chem., vol. 21, pp. 11-25, 2015. [17] V.D. Punetha, S. Rana, H.J. Yoo, A. Chaurasia, J.T. McLeskey Jr, M.S. Ramasamy, N.G. Sahoo et al., “Functionalization of carbon nanomaterials for advanced polymer nanocomposites: a comparison study between CNT and grapheneˮ, Prog. Polym. Sci., vol. 67, pp. 1-47, 2017. [18] R. Rafiee and R. Pourazizi, “Influence of CNT functionalization on the interphase region between CNT and polymerˮ, Comp. Mater. Sci., vol. 96, pp. 573-578, 2015. [19] L.A. Mercante, A. Pavinatto, L.E. Iwaki, V.P. Scagion, V. Zucolotto, O.N. Oliveira Jr, L.H. Mattoso 
 et al., “Electrospun polyamide 6/poly(allylamine hydrochloride) nanofibers functionalized with carbon nanotubes for electrochemical detection of dopamineˮ, ACS Appl. Mater. Inter., vol. 7, no. 8, pp. 4784-4790, 2015. [20] G. Abagnale, A. Sechi, M. Steger, Q. Zhou, C.-C. Kuo, G. Aydin, C. Schalla et al., “Surface topography guides morphology and spatial patterning of induced pluripotent stem cell coloniesˮ, Stem Cell Rep., vol. 9, no. 2, pp. 654-666, 2017. [21] F.J.H. Abadi, M.A. Tehran, F. Zamani, M. Nematollahi, L.G. Mobarakeh, and M.H. Nasr-Esfahani, “Effect of nanoporous fibers on growth and proliferation of cells on electrospun poly(ϵ-caprolactone) scaffoldsˮ, Int. J. Polym. Mater. Po., vol. 63, no. 2, pp. 57-64, 2014. [22] K.M. Kennedy, A. Bhaw-Luximon, and D. Jhurry, “Cell-matrix mechanical interaction in electrospun polymeric scaffolds for tissue engineering: implications for scaffold design and performanceˮ, Acta Biomater., vol. 50, pp. 41-55, 2017. [23] G.-Y. Liao, X.-P. Zhou, L. Chen, X.-Y. Zeng, X.-L. Xie, and Y.-W. Mai, “Electrospun aligned PLLA/ PCL/functionalised multiwalled carbon nanotube composite fibrous membranes and their bio/ mechanical propertiesˮ, Compos. Sci. Technol., vol. 72, no. 2, pp. 248-255, 2012. [24] K. Saeed, S.-Y. Park, H.-J. Lee, J.-B. Baek, and W.S. Huh, “Preparation of electrospun nanofibers of carbon nanotube/polycaprolactone nanocompositeˮ, Polymer, vol. 47, no. 23, pp. 8019-8025, 2006.
[25] Z.X. Meng, W. Zheng, L. Li, and Y.F. Zheng, “Fabrication and characterization of threedimensional nanofiber membrance of PCL–MWCNTs by electrospinningˮ, Mater. Sci. Eng. C, vol. 30, no. 7, pp. 1014-1021, 2010. [26] F. Jahanmard-Hosseinabadi, M. Amani-Tehran, and M.B. Eslaminejad, “Mathematical modeling and experimental evaluation for the predication of single nanofiber modulusˮ, J. Mech. Behav. Biomed., vol. 79, pp. 38-45, 2018. [27] M. Shtein, I. Pri-Bar, and O. Regev, “A simple solution for the determination of pristine carbon nanotube concentrationˮ, Analyst, vol. 138, no. 5, pp. 14901496, 2013. [28] Y. Liu and S. Kumar, “Polymer/carbon nanotube nano composite fibers–a reviewˮ, ACS Appl. Mater. Inter., vol. 6, no. 9, pp. 6069-6087, 2014. [29] Q. Shi, S.-C. Wong, W. Ye, J. Hou, J. Zhao, and J. Yin, “Mechanism of adhesion between polymer fibers at nanoscale contactsˮ, Langmuir, vol. 28, no. 10, pp. 4663-4671, 2012.