TY - JOUR
T1 - Printable ionic liquid modified cellulose acetate for sustainable chromic and resistive temperature sensing
AU - Cruz, B. D. D.
AU - Castro, A. S.
AU - Fernandes, L. C.
AU - Pereira, N.
AU - Mendes-Felipe, C.
AU - Tariq, M.
AU - Esperança, J. M. S. S.
AU - Martins, P. M.
AU - Lanceros-Méndez, S.
AU - Correia, D. M.
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04050%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0008%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT#
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F50006%2F2020/PT#
info:eu-repo/grantAgreement/FCT/Concurso de Projetos de I&D em Todos os Domínios Científicos - 2022/2022.05932.PTDC/PT#
info:eu-repo/grantAgreement/FCT/POR_NORTE/2022.13287.BD/PT#
info:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F145345%2F2019/PT#
info:eu-repo/grantAgreement/FCT/CEEC IND 3ed/2020.02802.CEECIND%2FCP1600%2FCT0017/PT#
info:eu-repo/grantAgreement/FCT/CEEC IND 3ed/2020.02915.CEECIND%2FCP1600%2FCT0029/PT#
Portuguese Foundation for Science and Technology (FCT): UID/FIS/04650/2020, UID/QUI/00686/2020.
This study forms part of the Advanced Materials program and was supported by MCIN with funding from European Union NextGenerationEU (PRTR-C17\u00B7I1) and by the Basque Government under the IKUR program and though the POSTDOC fellowship program (POS-E_2021_2_0001). Funding from the Basque Government Industry Department under the ELKARTEK program is also acknowledged. Technical and human support provided by SGIker (UPV/EHU, MICINN, GV/EJ, EGEF, and ESF) is gratefully acknowledged.
Publisher Copyright:
© 2024 The Authors
PY - 2024/9
Y1 - 2024/9
N2 - Sustainable technologies and the circular economy paradigms require a reduction of waste, and therefore, research is focusing on the development of sustainable materials and devices capable of being reused, refurbished or recycled. In the present work, printable ionic liquid (IL)-based polymer composites with thermochromic properties have been developed through a more sustainable approach to mitigate the negative impact of advanced functional materials and processes. For this purpose, composite films based on a natural polymer, cellulose acetate (CA), and different contents of the thermochromic IL, bis(1-butyl-3-methylimidazolium) tetrachloronickelate ([Bmim]2[NiCl4]), have been processed by a solvent casting method for the development of sustainable temperature sensors. The composites are transparent at room temperature, but when exposed to a temperature of 50 °C, the colour changes to blue. Incorporating the thermochromic IL led to the appearance of pores in the material's structure, which increased with increasing IL concentration. Additionally, the Young Modulus decreases with increasing IL concentration, reaching a value of 840 ± 158 MPa) for the sample with 40 % wt. Contrarily, the electrical conductivity strongly increases with the highest DC electrical conductivity, with a maximum conductivity of 1.1 × 10–5 ± 1.5 × 10–6 S.cm-1 obtained for the sample with 40 % wt. of [Bmim]2[NiCl4]. As a proof of concept, the potential applicability of the developed natural-based nanoparticle-free materials was demonstrated with a CA/40[Bmim]2[NiCl4] sample by the development of printable thermochromic temperature sensors for thermotherapy applications in the temperature range from 33 °C to 50 °C.
AB - Sustainable technologies and the circular economy paradigms require a reduction of waste, and therefore, research is focusing on the development of sustainable materials and devices capable of being reused, refurbished or recycled. In the present work, printable ionic liquid (IL)-based polymer composites with thermochromic properties have been developed through a more sustainable approach to mitigate the negative impact of advanced functional materials and processes. For this purpose, composite films based on a natural polymer, cellulose acetate (CA), and different contents of the thermochromic IL, bis(1-butyl-3-methylimidazolium) tetrachloronickelate ([Bmim]2[NiCl4]), have been processed by a solvent casting method for the development of sustainable temperature sensors. The composites are transparent at room temperature, but when exposed to a temperature of 50 °C, the colour changes to blue. Incorporating the thermochromic IL led to the appearance of pores in the material's structure, which increased with increasing IL concentration. Additionally, the Young Modulus decreases with increasing IL concentration, reaching a value of 840 ± 158 MPa) for the sample with 40 % wt. Contrarily, the electrical conductivity strongly increases with the highest DC electrical conductivity, with a maximum conductivity of 1.1 × 10–5 ± 1.5 × 10–6 S.cm-1 obtained for the sample with 40 % wt. of [Bmim]2[NiCl4]. As a proof of concept, the potential applicability of the developed natural-based nanoparticle-free materials was demonstrated with a CA/40[Bmim]2[NiCl4] sample by the development of printable thermochromic temperature sensors for thermotherapy applications in the temperature range from 33 °C to 50 °C.
KW - Cellulose acetate
KW - Composites
KW - Ionic liquids
KW - Printing systems
KW - Thermochromism
UR - http://www.scopus.com/inward/record.url?scp=85202842416&partnerID=8YFLogxK
U2 - 10.1016/j.susmat.2024.e01101
DO - 10.1016/j.susmat.2024.e01101
M3 - Article
AN - SCOPUS:85202842416
SN - 2214-9937
VL - 41
JO - Sustainable Materials and Technologies
JF - Sustainable Materials and Technologies
M1 - e01101
ER -