A stabilization of the electrospun, modified polyacrylonitril with functionalized single-walled carbon nanotubes

Fatemeh Farhadi,Marjan Abbasi,Akbar K Haghi

doi:10.1177/15589250211046243

Fatemeh Farhadi, Marjan Abbasi + Show 1 more

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https://doi.org/10.1177/15589250211046243

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Abstract

In the present study, poly (acrylonitrile-co-methyl methacrylate), P (AN-co-MMA), nanofibers and P (AN-co-MMA) nanofibers with Functionalized Single-Walled Carbon Nanotubes (F-SWCNTs) were produced by electrospinning and became stabilized. Besides, samples were evaluated using Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), a Scanning Electron Microscope (SEM), and X-ray diffraction (XRD). In the sample containing F-SWCNT, the amount of the heat released during stabilization reactions was lower than that with pure PAN copolymer nanofibers. This indicates that the F-SWCNTs prevent damage and sudden release of heat to the nanofibers during the stabilization process. Besides, the carbon nanotubes (CNTs) greatly prevent a decrease in the diameter of the nanofibers the size of the crystals, and the arrangement of the nanofibers during the stabilization process.

Highlights

Carbon nanotubes (CNTs) are hollow cylindrical structures divided into two types of single-walled nanotubes (SWCNTs) and multi-walled nanotubes (MWCNTs).[1,2,3,4] Double-walled carbon nanotubes (DWCNTs) are formed by two concentric single-walled carbon nanotubes (SWCNTs) being called “double-walled” nanotubes
The increase in the amount of CNTs in the polymeric solution resulted in the increasing of the electrical conductivity of the polymer solution (the electrical conductivity values of P (AN-coMMA) and P(AN-co-MMA)/ F-SWCNT-1 is 0.38 ± 0.02 and 2.53 ± 0.05 μS/cm respectively), which led to a larger electrical current during the electrospinning process in the fluid jet
The results of an analysis of variance (ANOVA) test and the Scheffe test show that an increase in FSWCNT caused a significant change in the nanofibers’ diameter at all levels at the confidence level of 95%

Summary

Introduction

Carbon nanotubes (CNTs) are hollow cylindrical structures divided into two types of single-walled nanotubes (SWCNTs) and multi-walled nanotubes (MWCNTs).[1,2,3,4] Double-walled carbon nanotubes (DWCNTs) are formed by two concentric SWCNTs being called “double-walled” nanotubes. The diameter of SWCNTs is 1–2 nm, whereas that of MWCNTs ranges from 2 to 25 nm.[5] The spacing between the layers of graphene in MWCNTs is 0.36 nm. In the study by McDevitt et al.,[6] SWCNTs with diameter of 1.4 nm and lengths of 0.2–1 μm were used. The high aspect ratio (the length divided by width) of CNTs presents a large surface area for modification with various functionalities

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