Investigation of Morphological and Mechanical Properties of Electrospun Nanofibers Nanocomposites Based on PLA/ZIF-8
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1Department of Life Sciences Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
2Department of Polymer, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
In this study, electrospun poly (lactic acid) (PLA) nanofibrous nanocomposites containing zeolitic imidazolate frameworks-8 nanoparticles (ZIF-8 NPs) with three different concentrations of 1, 3, and 5 wt.% were prepared to investigate their morphological and mechanical properties. In this regard, the FE-SEM images showed that the mean diameters of the nanocomposite samples were decreased from 890 to 462 nm by increasing the ZIF-8 contents from 1 to 5 wt.%. The mechanical properties such as tensile strength and strain at break exhibited the intersitng results. Related to the tensile strength values of the samples, they were increased by raising the ZIF-8 content up to 3 wt.% followed by decreasing with more nano-filler content up to 5 wt.%. In contrast to tensile strenth, the strain at break values of the nanocomposite samples showed the desceding and ascending trends by incraesing the ZIF-8 concentrations. Finally, the approperiate sample was selected for PLA nanofibrous nanocomposite containing 3 wt.% of ZIF-8 in which its tensile strength and strain at break were 4.68 MPa and 67.9%, respectively. The results revealed that this optimized sample can be a good candidate for vascular tissue engineering applications.