Raman spectroscopy of polystyrene nanofibers—Multiwalled carbon nanotubes composites

Chipara, Dorina; Macossay, Javier; Ybarra, Ana V.R.; Chipara, Alin Cristian; Eubanks, T. M.; Chipara, Mircea

doi:10.1016/j.apsusc.2013.01.116

Cited by 46 publications

(31 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The peaks at 1745 cm −1 , 1529 cm −1 , 1452 cm −1 and 1403 cm −1 in the case of nanofibers containing MWCNTs exhibited shifts towards higher frequencies, indicating the interaction between the polymer chains and the MWCNTs. These shifts are indicative of proper dispersion and non-specific covalent interaction between the σ bond in C-N and the π electrons from MWCNTs (Chipara et al, 2013). …”

Section: Resultsmentioning

confidence: 99%

Imaging, spectroscopy, mechanical, alignment and biocompatibility studies of electrospun medical grade polyurethane (Carbothane™ 3575A) nanofibers and composite nanofibers containing multiwalled carbon nanotubes

Sheikh

Macossay²,

Cantu³

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

Self Cite

View full text Add to dashboard Cite

In the present study, we discuss the electrospinning of medical grade polyurethane (Carbothane™ 3575A) nanofibers containing multi-walled-carbon-nanotubes (MWCNTs). A simple method that does not depend on additional foreign chemicals has been employed to disperse MWCNTs through high intensity sonication. Typically, a polymer solution consisting of polymer/MWCNTs has been electrospun to form nanofibers. Physiochemical aspects of prepared nanofibers were evaluated by SEM, TEM, FT-IR and Raman spectroscopy, confirming nanofibers containing MWCNTs. The biocompatibility and cell attachment of the produced nanofiber mats were investigated while culturing them in the presence of NIH 3T3 fibroblasts. The results from these tests indicated non-toxic behavior of the prepared nanofiber mats and had a significant attachment of cells towards nanofibers. The incorporation of MWCNTs into polymeric nanofibers led to an improvement in tensile stress from 11.40 ± 0.9 to 51.25 ± 5.5 MPa. Furthermore, complete alignment of the nanofibers resulted in an enhancement on tensile stress to 72.78 ± 5.5 MPa. Displaying these attributes of high mechanical properties and non-toxic nature of nanofibers are recommended for an ideal candidate for future tendon and ligament grafts.

show abstract

Section: Resultsmentioning

confidence: 99%

Imaging, spectroscopy, mechanical, alignment and biocompatibility studies of electrospun medical grade polyurethane (Carbothane™ 3575A) nanofibers and composite nanofibers containing multiwalled carbon nanotubes

Sheikh

Macossay²,

Cantu³

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The small peak at 303 cm −1 due to the asymmetric vibration of the TiO 6 octahedra is closely linked to the tetragonal symmetry of the Ba 0.7 Sr 0.3 TiO 3 powder . The bands at ∼3,000 and 800 cm −1 in the Raman spectrum of pristine PS are due to the C–H vibrations and the C–C vibrations, respectively, while the band at 1,600 cm −1 is assigned to the C = C bonds . The spectra of the Ba 0.7 Sr 0.3 TiO 3 /PS composite films becomes increasingly complex with the overlap between the lines from the polymer matrix and Ba 0.7 Sr 0.3 TiO 3 filler.…”

Section: Resultsmentioning

confidence: 93%

Synthesis, characterization, thermal, dynamic mechanical, and dielectric studies of Ba_0.7Sr_0.3TiO₃/polystyrene composites

et al. 2018

View full text Add to dashboard Cite

Ba0.7Sr0.3TiO3/polystyrene composite films were successfully prepared through solution casting route and characterized by SEM and XRD. The particle size distribution of sol‐gel synthesized Ba0.7Sr0.3TiO3 filler was analyzed by dynamic light scattering. The Z‐average size of Ba0.7Sr0.3TiO3 particles is 314.78 nm (∼0.3 µm). At low concentrations of the filler there is no significant agglomeration between the particles whereas at higher concentrations of the filler (∼40 vol%) agglomerates were observed in the composite film as evidenced by scanning electron microscopy. The thermal and dynamic mechanical properties of the synthesized composites were studied in detail that show the 30 vol% Ba0.7Sr0.3TiO3/PS to be the most effective composite. The dielectric properties of Ba0.7Sr0.3TiO3/PS composites as a function of the filler content in the polymer matrix in the range 10 Hz to 1 MHz and at 5 GHz along with temperature dependent dielectric studies for 30 vol% and 50 vol% Ba0.7Sr0.3TiO3/PS composites at 10 kHz and 1 MHz have been reported. The dielectric constant for 50 vol% Ba0.7Sr0.3TiO3/PS composite at 5 GHz is 10.34 which is higher than reported literature values for similar polystyrene composites with other fillers. Different theoretical models were employed to predict the effective permittivity of the composites and compared with the experimental results. POLYM. COMPOS., 39:E1714–E1724, 2018. © 2018 Society of Plastics Engineers

show abstract

“…However, in the average Raman spectra of the PS fiber mats with 5% MWNT, two characteristic bands of carbon nanotubes were observed. First of which is located at 1600 cm −1 which corresponds to the G‐band caused by the in‐plane Raman active mode of graphite . Another peak can be observed at 1350 cm −1 , which signifies the D‐band due to the structural or crystalline quality of the carbon nanotubes in the system …”

Section: Resultsmentioning

confidence: 99%

“…First of which is located at 1600 cm À1 which corresponds to the G-band caused by the in-plane Raman active mode of graphite. [36] Another peak can be observed at 1350 cm À1 , which signifies the D-band due to the structural or crystalline quality of the carbon nanotubes in the system. [36] To confirm if any macromolecular interactions exist between the polymer and the MWNT, thermogravimetric analyses were performed on pure PS fibers, representative PS-MWNT fibers with 5% MWNT and pure MWNT and recorded under a nitrogen atmosphere from 25-900 C at a 10 C/min heating rate.…”

Section: Macromolecular Symposiamentioning

confidence: 99%

“…[36] Another peak can be observed at 1350 cm À1 , which signifies the D-band due to the structural or crystalline quality of the carbon nanotubes in the system. [36] To confirm if any macromolecular interactions exist between the polymer and the MWNT, thermogravimetric analyses were performed on pure PS fibers, representative PS-MWNT fibers with 5% MWNT and pure MWNT and recorded under a nitrogen atmosphere from 25-900 C at a 10 C/min heating rate. Based on the thermogram for the pure PS fibers ( Figure 5), only one significant degradation step was observed beginning at 300 C and reaching almost complete degradation at a temperature above 400 C. On the other hand, the thermogram for the pure MWNTs showed small degradation.…”

Section: Macromolecular Symposiamentioning

confidence: 99%

See 1 more Smart Citation

Electrospinning Superhydrophobic and Antibacterial PS/MWNT Nanofibers onto Multilayer Gas Barrier Films

Tiu

Nguyen

Rodrigues

et al. 2017

Macromolecular Symposia

View full text Add to dashboard Cite

In this work, we demonstrate the non‐synthetic surface modification of a co‐extruded multilayer poly(methyl methacrylate) (PMMA)/poly(ϵ‐caprolactone) (PCL) film with gas barrier properties through electrospinning of polystyrene (PS)/multi‐walled carbon nanotube (MWNT) nanofibers. As produced by forced assembly layer multiplying co‐extrusion, the heterogeneous nucleating crystallization of PCL was induced using the glassy confinement of the amorphous PMMA thus creating in‐plane lamellae crystallization, which is impermeable to most gas molecules. To complement these intrinsic gas barrier properties of the multilayer film, electrospun PS/MWNT nanofibers were deposited onto the surface of the PMMA/PCL film, which increased the surface roughness and resulted in superhydrophobic behavior (water contact angles>150°). Furthermore, the inclusion of the MWNT in the matrix caused an increasing antibacterial efficacy, which was determined to reach 97% inactivation against gram‐positive bacteria Bacillus subtilis. The fiber mats were further characterized using scanning electron microscopy (SEM), Raman spectroscopy, and thermogravimetric analysis (TGA).

show abstract

Raman spectroscopy of polystyrene nanofibers—Multiwalled carbon nanotubes composites

Cited by 46 publications

References 17 publications

Imaging, spectroscopy, mechanical, alignment and biocompatibility studies of electrospun medical grade polyurethane (Carbothane™ 3575A) nanofibers and composite nanofibers containing multiwalled carbon nanotubes

Imaging, spectroscopy, mechanical, alignment and biocompatibility studies of electrospun medical grade polyurethane (Carbothane™ 3575A) nanofibers and composite nanofibers containing multiwalled carbon nanotubes

Synthesis, characterization, thermal, dynamic mechanical, and dielectric studies of Ba_0.7Sr_0.3TiO₃/polystyrene composites

Electrospinning Superhydrophobic and Antibacterial PS/MWNT Nanofibers onto Multilayer Gas Barrier Films

Contact Info

Product

Resources

About

Raman spectroscopy of polystyrene nanofibers—Multiwalled carbon nanotubes composites

Cited by 46 publications

References 17 publications

Imaging, spectroscopy, mechanical, alignment and biocompatibility studies of electrospun medical grade polyurethane (Carbothane™ 3575A) nanofibers and composite nanofibers containing multiwalled carbon nanotubes

Imaging, spectroscopy, mechanical, alignment and biocompatibility studies of electrospun medical grade polyurethane (Carbothane™ 3575A) nanofibers and composite nanofibers containing multiwalled carbon nanotubes

Synthesis, characterization, thermal, dynamic mechanical, and dielectric studies of Ba0.7Sr0.3TiO3/polystyrene composites

Electrospinning Superhydrophobic and Antibacterial PS/MWNT Nanofibers onto Multilayer Gas Barrier Films

Contact Info

Product

Resources

About

Synthesis, characterization, thermal, dynamic mechanical, and dielectric studies of Ba_0.7Sr_0.3TiO₃/polystyrene composites