Chitosan/Polyaniline Conductive Blends for Developing Packaging: Electrical, Morphological, Structural and Thermal Properties
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The present study aim to evaluate the development of electrical conducting blends made from the biodegradable polymer, chitosan (Cs), and polyaniline (PANI) doped with dodecylbenzene sulfonic acid dissolved in acid solution chitosan, to enable development of conductive and smart packages that help to monitor exposure conditions of food aimed to reduce food waste. Concentration of Cs is fixed (2%), and PANI (80, 100 mg mL−1) and glutaraldehyde (Glut) (0.625 × 10−3 μL) concentrations are alter. Morphological (SEM), structural (FTIR, RAMAN), thermal (TGA) and electrical (Hall effect) properties are evaluate. Blends were predominantly negative carriers, with conductivity in order of 10−1 S cm−1. Best formulations are those make without of Glut. Analyses show an interaction between components. FTIR show bands characteristic of benzene and quinoid rings of PANI, and RAMAN exhibit a band related to PANI’s protonation. TGA show maintenance of maximum degradation temperature of PANI. This results evidence maintenance of PANI’s conducting structures even after blends synthesis.
KeywordsPolymers Raman Hall effect Charge carriers Semiconductor materials
The authors thank FAPEMIG (Research Support Foundation of the State of Minas Gerais), CNPq (National Council for Scientific and Technological Development) and CAPES (Coordination of Improvement of Higher Level Personnel) for financial support and scholarships. The authors would like to thank Laboratory of Electron Microscopy and Analysis of Ultrastructural Federal University of Lavras, (http://www.prp.ufla.br/labs/microscopiaeletronica/) and Finep, Fapemig, CNPq and Capes for supplying the equipment and technical support for experiments involving electron microscopy. The authors would like to thank the Central of Analysis and Chemical Prospecting of the Federal University of Lavras, and Finep, Fapemig, CNPq e Capes for supplying the equipment and technical support for experiments involving FTIR and TGA analyzes. Authors thank Department of Physics of the Federal University of Lavras for provision of equipment and technical support for experiments in Raman Spectroscopy, and Federal University of Juiz de Fora for provision of equipment and technical support for experiments in Hall effect.
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