Poly(ethylene terephthalate) glycol/carbon black composites for 4D printing

Rahmatabadi, D, Bayati, A, Khajepour, M, Mirasadi, K, Ghasemi, I, Baniassadi, M, Abrinia, K, Bodaghi, M ORCID: https://orcid.org/0000-0002-0707-944X and Baghani, M, 2024. Poly(ethylene terephthalate) glycol/carbon black composites for 4D printing. Materials Chemistry and Physics, 325: 129737. ISSN 0254-0584

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Abstract

This research introduces PETG-CB (poly(ethylene terephthalate) glycol modified with carbon black) composites, a new class of shape memory polymers 4D printed using the Fused Deposition Modeling (FDM) method. Nanocomposites with varying concentrations of CB (0.5 %, 1 %, and 3 % by weight) are developed to enhance the functional performance of PETG in 4D printing applications. Comprehensive characterization at the micro- and macro-scale, including dynamic thermal mechanical analysis (DMTA), scanning electron microscopy (SEM), and mechanical testing, is employed to assess the viscoelastic behavior, microstructural integrity, and mechanical strength under thermal stimulation. Experimental results reveal that CB addition significantly alters the glass transition temperature and improves mechanical properties, with the 1 % CB composite demonstrating optimal tensile strength and enhanced shape memory effects. SEM analysis confirms a uniform distribution of CB particles, contributing to the improved mechanical properties and printability of the nanocomposites. The shape memory tests show excellent recovery rates above 97 %, with faster recovery observed in composites with higher CB content. These findings highlight the potential of PETG-CB composites in applications requiring rapid response and high mechanical performance, making them promising materials for future advancements in the 4D printing technology.

Item Type:	Journal article
Publication Title:	Materials Chemistry and Physics
Creators:	Rahmatabadi, D., Bayati, A., Khajepour, M., Mirasadi, K., Ghasemi, I., Baniassadi, M., Abrinia, K., Bodaghi, M. and Baghani, M.
Publisher:	Elsevier BV
Date:	1 October 2024
Volume:	325
ISSN:	0254-0584
Identifiers:	Number Type 10.1016/j.matchemphys.2024.129737 DOI S0254058424008629 Publisher Item Identifier 1917054 Other
Rights:	© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Divisions:	Schools > School of Science and Technology
Record created by:	Melissa Cornwell
Date Added:	22 Jul 2024 10:02
Last Modified:	22 Jul 2024 10:02
URI:	https://irep.ntu.ac.uk/id/eprint/51799

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