3D-printed PLA/PEO blend as biodegradable substrate coating with CoCl2 for colorimetric humidity detection


This study aimed to fabricate biodegradable substrate with colorimetric humidity indicator for detective moisture in food packaging. The poor properties of poly(lactic acid) (PLA) were enhanced by melt blending PLA with non-toxic poly(ethylene oxide) PEO at 180 °C. Specifically, three-dimensional (3D) substrates of PLA/PEO blends were fabricated by solvent-cast 3D printing. Furthermore, cobalt chloride (CoCl2) solution was printed onto the substrate with an inkjet printer to serve as a colorimetric humidity sensing indicator. It found that the flexibility and thermal stability of the PLA were improved and the hydrophilicity was increased with an increase in PEO content. Color changes and the sensitivity of this material were confirmed using image analysis and total color difference. The CoCl2 indicator displayed color changes that ranged from blue to pink under ambient conditions (above 60%RH), revealing suitable potential for frozen food packaging material with aim to detect amount of moisture in the packaging.

Publication DOI: https://doi.org/10.1016/j.fpsl.2022.100829
Divisions: College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
College of Engineering & Physical Sciences > Aston Institute of Urban Technology and the Environment (ASTUTE)
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Aston Polymer Research Group
Additional Information: © 2022, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: This research was financially supported by the Program Management Unit for Human Resources & Institutional Development, Research and Innovation, Office of National Higher Education Science Research and Innovation Policy Council (NXPO), Thailand [Grant Number B16F640001]; National Electronics, Computer Technology Center (NECTEC), National Science and Technology Development Agency (NSTDA), Thailand; the Center for Innovation in Chemistry (PERCH-CIC) and the Center of Excellence in Materials Science and Technology, Chiang Mai University, Thailand. This project also received funding from the European Union's Horizon 2020 Research and Innovation Programme under Marie Sklodowska-Curie grant agreement No. 871650 (MEDIPOL).
Publication ISSN: 2214-2894
Last Modified: 10 Jul 2024 07:11
Date Deposited: 16 Mar 2022 10:37
Full Text Link:
Related URLs: https://www.sci ... 0217?via%3Dihub (Publisher URL)
PURE Output Type: Article
Published Date: 2022-06
Published Online Date: 2022-02-17
Accepted Date: 2022-02-10
Authors: Chaiya, Nattanicha
Daranarong, Donraporn
Worajittiphon, Patnarin
Somsunan, Runglawan
Meepowpan, Puttinan
Tuantranont, Adisorn
Rakbamrung, Nawasit
Topham, Paul D. (ORCID Profile 0000-0003-4152-6976)
Tighe, Brian J. (ORCID Profile 0000-0001-9601-8501)
Mahomed, Anisa (ORCID Profile 0000-0002-3719-7543)
Punyodom, Winita

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