Electrical and mechanical properties of self-supported hydroxypropyl methylcellulose–polyaniline conducting films

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Abstract
The purpose of this work was to develop a simple method to produce self-supported films composed of hydroxypropyl methylcellulose (HPMC) and polyaniline (PANI) by the direct mixture of aqueous dispersions of both polymers with subsequent drying. The addition of HPMC, a cellulose derivative with an excellent film-forming capacity, was fundamental to overcoming the poor processability of PANI, which impairs its use in many technological applications. All films showed conductivity in the order of 10−2 to 10−3 S cm−1, which is in the range for metals or semiconductors. The typical electroactivity of PANI was also maintained in the hybrid films. The thermal stability and the mechanical properties of the pristine PANI were also improved with the addition of HPMC. Cellulose-containing conducting polymers can be considered a material of the future, with possible applications in several areas, such as smart wallpapers, e-papers, and sensors.
Funding Information
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (310893/2021-6)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (2018/20826-4)
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (2021/08987-5)
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Finance Code 001)

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