Abstract
The aim of this study is to develop and characterize an activated biochar-based polymer composite for biosensors in smart food packaging. Biochar was made from corn stover and activated using the steam-activation method. The activated biochar (ABC) was synthesized with polylactic acid (PLA) by a solvent casting method. While ABC ranged from 85% to 50%, PLA content varied from 15% to 50% (w/w) in the polymer composite. The electrical conductivity of the developed ABC/PLA composite was measured through differential plus voltammetry (DPV) and cyclic voltammetry (CV) using a potentiostat. It was found that the current increased from 0.3 to 2.31 mA for CV and 0.16 to 1.02 mA for DPV when ABC contents changed from 50% to 85%. The tensile strength (TS) and Young 's modulus of the ABC/PLA composite film increased from 0.81 to 3.04 MPa and 56.31 to 102.69 MPa respectively when PLA contents increased from 15% to 50%. The biosensor was fabricated with 85% ABC/PLA-based composite using a drop-casting method. The resistance of the fabricated biosensor increased as the concentration of NH3 increased over the range of 80 to 170 ppm.
Original language | English (US) |
---|---|
Pages (from-to) | 544-560 |
Number of pages | 17 |
Journal | International Journal of Polymer Analysis and Characterization |
Volume | 26 |
Issue number | 6 |
DOIs | |
State | Published - 2021 |
Externally published | Yes |
Keywords
- Activated biochar
- biosensor
- composite
- polylactic acid
- polymer
- smart packaging
ASJC Scopus subject areas
- Analytical Chemistry
- General Chemical Engineering
- Polymers and Plastics