Fabricating fibers of a porous-polystyrene shell and particle-loaded core

Dharneedar Ravichandran, Weiheng Xu, Rahul Franklin, Namrata Kanth, Sayli Jambhulkar, Sumedh Shukla, Kenan Song

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Polystyrene (PS) polymers have broad applications in protective packaging for food shipping, containers, lids, bottles, trays, tumblers, disposable cutlery and the making of models. Currently, most PS products, such as foams, are not accepted for recycling due to a low density in the porous structure. This poses a challenge for logistics as well as creating a lack of incentive to invest in high-value products. This study, however, demonstrated the use of a dry-jet wet-spinning technique to manufacture continuous PS fibers enabled by an in-house designed and developed spinning apparatus. The manufactured fibers showed porosity in the shell and the capability to load particles in their core, a structure with high potential use in environmentally relevant applications such as water treatment or CO2 collections. A two-phase liquid-state microstructure was first achieved via a co-axial spinneret. Following coagulation procedures and heat treatment, phase-separation-based selective dissolution successfully generated the porous-shell/particle-core fibers. The pore size and density were controlled by the porogen (i.e., PEG) concentrations and examined using scanning electron microscopy (SEM). Fiber formation dynamics were studied via rheology tests and gelation measurements. The shell components were characterized by tensile tests, thermogravimetric analysis, and differential scanning calorimetry for mechanical durability and thermal stability analyses.

Original languageEnglish (US)
Article number4142
JournalMolecules
Volume24
Issue number22
DOIs
StatePublished - 2019

Keywords

  • Composites
  • Fibers
  • Polyethylene glycol
  • Polymers
  • Polystyrene
  • Porous
  • Spinning

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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  • Cite this

    Ravichandran, D., Xu, W., Franklin, R., Kanth, N., Jambhulkar, S., Shukla, S., & Song, K. (2019). Fabricating fibers of a porous-polystyrene shell and particle-loaded core. Molecules, 24(22), [4142]. https://doi.org/10.3390/molecules24224142