Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/136896
Title: Twin screw extrusion of conductive citrate-based biomaterials
Authors: Shah, Ankur Harish
Bhusari, Shardul
Djordjevic, Ivan
Steele, Terry W. J.
Keywords: Engineering::Materials
Issue Date: 2018
Source: Shah, A. H., Bhusari, S., Djordjevic, I., & Steele, T. W. J. (2019). Twin screw extrusion of conductive citrate-based biomaterials. European Polymer Journal, 110, 176-182. doi:10.1016/j.eurpolymj.2018.08.010
Journal: European Polymer Journal
Abstract: The range of processing methods for thermoset bioelastomers is limited due to the insolubility of their highly crosslinked nature. In-line extrusion of biodegradable polyester elastomers and their composites would open new possibilities for high-precision manufacturing (i.e. 3D printing), solvent-free additive dispersion, and adhesion development for future clinical needs. An effective method to extrude elastomeric, conductive composites is demonstrated for the first time with polyoctanediol citrate/sebacate (POCS) as the bioelastomer. The POCS pre-polymer in its liquid form was blended with untreated multiwall carbon nanotubes (MWCNTs) and partially cured to produce the feedstock for twin-screw hot-melt extrusion. MWCNTs were mechanically sheered within the POCS matrix at a processing temperature of 120 °C, which thermocured from a viscoelastic liquid into an extrudable crosslinked composite rubber. Furthermore, the composite was thermally and electrically conductive with swelling and hydrolytic degradation kinetic properties dependent on MWCNT concentration. Extruded composite strings are classified as conductive polymers, with lowest resistivity of 3.5 kΩ cm measured for POCS-MWCNT-5% in comparison to POCS-MWCNT-1% at 22.7 kΩ cm. Extruded strings (∼2 mm in diameter) exhibit a tensile modulus of 5–7.5 MPa with an extensibility of 40–80%. The processing method lays the framework for rapid formulation development of citrate based biomaterial composites and scale-up production.
URI: https://hdl.handle.net/10356/136896
ISSN: 0014-3057
DOI: 10.1016/j.eurpolymj.2018.08.010
Rights: © 2018 Elsevier Ltd. All rights reserved. This paper was published in European Polymer Journal and is made available with permission of Elsevier Ltd.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

Files in This Item:
File Description SizeFormat 
Twin screw extrusion of conductive citrate-based biomaterials.pdf6.8 MBAdobe PDFView/Open

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.