Production of conductive microfibers based on Polybutylene adipate terephthalate and graphite using a 3D printed electrospinning system and their application as electrochemical dopamine sensor

Author(s)

Souza, Daniel C. ; Carvalho, Jefferson H. S. ; Freitas, Rafaela C. ; Bellettini, Ismael C. ; Janegitz, Bruno C.

• Document type: Journal article
• Source: Microchemical Journal; v. 206, p. 10-pg., 2024-08-30.

Abstract

The use of fibers has intensified in the application of technological and industrial devices and systems, due to their characteristics such as mechanical resistance, elasticity, and a wide range of morphological configurations. In this sense, conductive microfibers based on graphite powder (GP) and the polylactic acid/ Polybutylene adipate terephthalate polymeric blend were developed through the electrospinning technique using a new 3D printer automatized collector. The obtained microfibers were characterized and used in the manufacture of an electrochemical sensor for the determination of dopamine, which presented a linear range of 0.5 to 20 mu mol L-1 with a limit of detection of 0.008 mu mol L-1. The sensor was applied for the detection of dopamine in a human serum sample and had a recovery range of 85.5 to 101.0 %. Therefore, conductive microfibers manufactured by electrospinning have potential as a material for the development of electrochemical sensors. (AU)

• FAPESP's process: 20/11336-3 - New immunosensor platforms for detection of biomarkers of the disease Amyotrophic Lateral Sclerosis
• Grantee: Jefferson Henrique de Souza Carvalho
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 23/06793-4 - Development of applied multiplex electrochemical systems for detection of biomarkers related to cardiovascular diseases
• Grantee: Bruno Campos Janegitz
• Support Opportunities: Regular Research Grants