Preparation of electrospun nanofibers of carbon nanotube/polycaprolactone nanocomposite

• Published in: Polymer (Guilford) Vol. 47; no. 23; pp. 8019 - 8025
• Main Authors: Saeed, Khalid, Park, Soo-Young, Lee, Hwa-Jeong, Baek, Jong-Beom, Huh, Wan-Soo
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 30.10.2006; Elsevier
• Subjects: Applied sciences; Composites; Exact sciences and technology; Forms of application and semi-finished materials; In situ polymerization; MWNT; Nanofibers; Polymer industry, paints, wood; Technology of polymers; MWNT; Nanofibers; In situ polymerization; Ring opening polymerization; Dispersion degree; In situ; Synthetic fiber; Carbon nanotubes; Electrospinning; Nanofiber; Experimental study; Thermal stability; Solvent spinning; Functionalization; Multiwalled nanotube; Dynamic mechanical properties; Morphology; Preparation; Concentration effect; Nanocomposite; Polycaprolactone; Modified material
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2006.09.012

Multiwalled carbon nanotube/polycaprolactone nanocomposites (MWNT/PCL) were prepared by in situ polymerization, whereby functionalized MWNTs (F-MWNTs) and unfunctionalized MWNTs (P-MWNTs) were used as reinforcing materials. The F-MWNTs were functionalized by Friedel–Crafts acylation, which introduced the aromatic amine (COC 6H 4–NH 2) groups on the side wall. The F-MWNTs were chemically bonded with the PCL chains in the F-MWNT/PCL, as indicated by the appearance of the amide II group in the FT-IR spectrum. The TGA thermograms showed that the F-MWNT/PCL had better thermal stability than PCL and P-MWNT/PCL. The PCL and the nanocomposite nanofibers were prepared by an electrospinning technique. The nanocomposites that contain more than 2 wt% of MWNTs were not able to be electrospun. The bead of the F-MWNT/PCL nanofiber was formed less than that of the P-MWNT/PCL. The nanocomposite nanofibers showed a relatively broader diameter than the pure PCL nanofibers. The MWNTs were embedded within the nanofibers and were well oriented along the axes of the electrospun nanofibers, as confirmed by transmission electron microscopy.