Loffredo, Fausta and Tammaro, Loredana and Di Luccio, Tiziana and Borriello, Carmela and Villani, Fulvia and De Vito, Saverio and Ramachandran, Karthik and Kornfield, Julia A. (2021) Effect of tungsten disulfide nanotubes on crystallization of polylactide under uniaxial deformation and annealing. Functional Composite Materials, 2 (1). Art. No. 3. ISSN 2522-5774. PMCID PMC8198810. doi:10.1186/s42252-021-00016-2. https://resolver.caltech.edu/CaltechAUTHORS:20210126-142455748
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Abstract
Tungsten disulfide (WS₂) nanotubes (NTs) are examined here as a filler for polylactide (PLA) for their ability to accelerate PLA crystallization and for their promising biocompatibility in relevant to biomedical applications of PLA-WS₂ nanocomposites. In this work, we have studied the structural and thermal properties of PLA-WS₂ nanocomposite films varying the concentration of WS₂ NTs from 0 (neat PLA) to 0.6 wt%. The films were uniaxially drawn at 90 °C and annealed at the same temperature for 3 and 10 min. Using wide angle x-ray scattering, Raman spectroscopy and differential scanning calorimetry, we probed the effects of WS₂ NT addition on the structure of the PLA films at various stages of processing (unstretched, stretching, annealing). We found that 0.6 wt% of WS₂ induces the same level of crystallinity in as stretched PLA-WS₂ as annealing in neat PLA for 10 min. These data provide useful insights into the role of WS₂ NTs on the structural evolution of PLA-WS₂ composites under uniaxial deformation, and extend their applicability to situations where fine tuning of PLA crystallinity is desirable.
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| Additional Information: | © 2021 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. Received 23 October 2020; Accepted 03 January 2021; Published 26 January 2021. The authors kindly acknowledge the Department of Industrial Engineering, (Prof. Giuliana Gorrasi), University of Salerno, Italy for the support in the tensile tests. Steven Weigand, beamline scientist at Beamline 5-ID-D of the APS at ANL, is especially acknowledged for his support with WAXS data collection and analysis. Dr. Alla Zak (Holon Institute of Technology) is acknowledged for providing a special purchase price of the WS_2 NTs from NanoMaterials in 2011 and useful discussions on their purification and dispersion. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 691238, the Jacobs Institute for Molecular Engineering for Medicine at the California Institute of Technology, and the National Heart, Lung, And Blood Institute of the National Institutes of Health under Award Number F31HL137308. Availability of data and materials: Not applicable. Author Contributions: Di Luccio and Kornfield designed the research, Di Luccio coordinated the activities. Tammaro manufactured the samples. Tammaro, Borriello, Villani, Loffredo, Ramachandran and Di Luccio performed experiments and analyzed the data. De Vito developed the code for Raman data analysis. All the authors reviewed and approved the manuscript. The authors declare that they have no competing interests. | |||||||||
| Group: | Jacobs Institute for Molecular Engineering for Medicine | |||||||||
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| Subject Keywords: | Poly(lactic acid) (PLA), Tungsten disulfide (WS2) nanotubes, Nanocomposites, Strain-induced crystallization, Uniaxial deformation, Raman spectroscopy | |||||||||
| Issue or Number: | 1 | |||||||||
| PubMed Central ID: | PMC8198810 | |||||||||
| DOI: | 10.1186/s42252-021-00016-2 | |||||||||
| Record Number: | CaltechAUTHORS:20210126-142455748 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20210126-142455748 | |||||||||
| Official Citation: | Loffredo, F., Tammaro, L., Di Luccio, T. et al. Effect of tungsten disulfide nanotubes on crystallization of polylactide under uniaxial deformation and annealing. Functional Composite Mater 2, 3 (2021). https://doi.org/10.1186/s42252-021-00016-2 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 107732 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 26 Jan 2021 22:42 | |||||||||
| Last Modified: | 11 Oct 2021 18:28 |
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