Tuning the Electrical Properties of Electrospun Nanofibers with Hybrid Nanomaterials for Detecting Isoborneol in Water Using an Electronic Tongue

Author(s)

Migliorini, Fernanda L. ; Teodoro, Kelcilene B. R. ; Scagion, Vanessa P. ; dos Santos, Danilo M. ; Fonseca, Fernando J. ; Mattoso, Luiz H. C. ; Correa, Daniel S.

• Document type: Journal article
• Source: SURFACES; v. 2, n. 2, p. 12-pg., 2019-06-01.

Abstract

The presence of contaminants in water is a subject of paramount importance nowadays, which can make water improper to human consumption even when these contaminants are present at very low concentrations, causing health issues and economic losses. In this work, we evaluated the performance of nanocomposites based on nylon 6,6/chitosan electrospun nanofibers modified by cellulose nanowhiskers combined with functional materials like silver nanoparticles, gold nanoparticles, and reduced graphene oxide to be used as sensing layers of an electronic tongue (e-tongue) to detect Isoborneol. This compound, found in some plants and essential oils, is used as a natural repellent and also to produce many other chemicals. Additionally, its chemical structure is related to that of 2-methylisoborneol, a critical pollutant in aqueous media. The synergism between the nanomaterials combined with electrospun nanofibers could be verified by the enhancement of the charge transference ability. Additionally, electrical capacitance data measured with the impedimetric e-tongue were treated by Principal Component Analysis (PCA), and revealed the sensing system was able to discriminate samples contaminated with Isoborneol at nanomolar concentrations. Moreover, the electronic tongue system could detect Isoborneol in real water samples under different concentrations. (AU)

• FAPESP's process: 17/12174-4 - Development of hybrid polymer nanofibers for agricultural applications
• Grantee: Daniel Souza Corrêa
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/21184-5 - Nanocomposites from cellulose nanocrystals electrospun fibers for the development of polymeric sensors
• Grantee: Kelcilene Bruna Teodoro Costa
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 17/20973-4 - Coaxial electrospun nanofibers based on chitosan for controlled release of antibiotics and periodontic lesion treatment
• Grantee: Danilo Martins dos Santos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/09414-6 - Implementation of an electronic tongue by flow detection of drinking water contaminants
• Grantee: Fernanda Lanzoni Migliorini
• Support Opportunities: Scholarships in Brazil - Post-Doctoral