Utilising bio-based plasticiser castor oil and recycled PLA for the production of conductive additive manufacturing feedstock and detection of bisphenol A

Author(s)

Crapnell, Robert D. ; Arantes, Iana V. S. ; Whittingham, Matthew J. ; Sigley, Evelyn ; Kalinke, Cristiane ; Janegitz, Bruno C. ; Bonacin, Juliano A. ; Paixao, Thiago R. L. C. ; Banks, Craig E.

• Document type: Journal article
• Source: GREEN CHEMISTRY; v. 25, n. 14, p. 10-pg., 2023-06-22.

Abstract

The production of electrically conductive additive manufacturing feedstocks from recycled poly(lactic acid) (rPLA), carbon black (CB), and bio-based plasticiser castor oil is reported herein. The filament was used to print additively manufactured electrodes (AMEs), which were electrochemically benchmarked against geometrically identical AMEs printed from a commercially available conductive filament. The castor oil/rPLA AMEs produced an enhanced heterogeneous electrochemical rate constant of (1.71 & PLUSMN; 0.22) x 10(-3) cm s(-1) compared to (0.30 & PLUSMN; 0.03) x 10(-3) cm s(-1) for the commercial AME, highlighting the improved performance of this filament for the production of working electrodes. A bespoke electroanalytical cell was designed and utilised to detect bisphenol A (BPA). The AMEs made from the castor oil/rPLA gave an enhanced electroanalytical performance compared to the commercial filament, producing a sensitivity of 0.59 & mu;A & mu;M-1, a LOD of 0.10 & mu;M and LOQ of 0.34 & mu;M. This system was then successfully applied to detect BPA in spiked bottled and tap water samples, producing recoveries between 89-104%. This work shows how the production of conductive filaments may be done more sustainably while improving performance. (AU)

• FAPESP's process: 19/00473-2 - Development of 3-dimensional (3D) printed electrochemical biosensors with PLA polymer and graphene for the determination of biomolecules and diagnosis of diseases
• Grantee: Cristiane Kalinke
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 22/07552-8 - Development of complete and miniaturized 3D-printed flow electrochemical systems for analytical applications
• Grantee: Iana Vitória Spadini Arantes
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate (Direct)
• FAPESP's process: 17/21097-3 - Bee-agriculture interactions: perspectives to sustainable use
• Grantee: Osmar Malaspina
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 18/08782-1 - Miniaturized and integrated chemical sensors: new fabrication platforms for biological, clinical and environmental applications
• Grantee: Mauro Bertotti
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 21/07989-4 - Additive-manufactured (3D printed) electrochemical devices for the diagnosis of viral diseases
• Grantee: Cristiane Kalinke
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 19/15065-7 - Development of paper-based electrochemical systems aiming flow analysis of forensic samples
• Grantee: Iana Vitória Spadini Arantes
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 13/22127-2 - Development of novel materials strategic for integrated analytical devices
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Projects - Thematic Grants