Covalently crosslinked hydroxypropyl allyl cellulose–polyaniline aerogels with compression-dependent impedance response
Rattachement africain : cz. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Electrically responsive and mechanically compliant materials are essential for the development of pressure sensors for wearable electronics and soft robotic systems. However, many cellulose-based conductive hydrogels and aerogels rely on physically stabilized or water-rich networks, which may suffer from swelling, evaporation, ion migration, structural relaxation, and reduced long-term electromechanical reliability. In this work, we report conductive cellulose-based aerogels functioning as impedance-type pressure-sensing materials, based on covalently crosslinked hydroxypropyl allyl cellulose (HPAC) combined with polyaniline (PANI). HPAC is synthesized via etherification and radical crosslinking to form permanent, three-dimensional macroporous scaffolds that retain structural integrity under large compressive deformation. Electrical conductivity is introduced through in situ oxidative polymerization of PANI dually doped with hydrochloric acid and poly(2-acrylamido-2-methyl-1-propanesulfonic acid), yielding a homogeneous nanofibrillar conductive network. Polyethylene glycol is incorporated as a non-covalent mechanical modifier to enhance compressibility and deformation-induced interdomain contact. The resulting aerogels sustain compressive strains up to 90% and exhibit pronounced pressure-dependent impedance changes spanning more than two orders of magnitude (~10 kΩ to 0.1 kΩ), with stable electromechanical response under load. Thermal analysis indicates delayed degradation and reliable operation from −70 to 100 °C. These results demonstrate a robust, covalently crosslinked cellulose aerogel platform for flexible pressure sensors and electromechanical sensing applications.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Covalently crosslinked hydroxypropyl allyl cellulose–polyaniline aerogels with compression-dependent impedance response
- Date Crossref
- 01/11/2026
- Éditeur
- Elsevier BV
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Chemistry and Technology Department of Physical Chemistry pays non établi dans la noticeUniversité ou école supérieure
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Czech Technical University in Prague Department of Measurement pays non établi dans la noticeUniversité ou école supérieure
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University of Pardubice pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Chemical Engineering pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Chemical Technology pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Electrical Engineering and Informatics pays non établi dans la noticeUniversité ou école supérieure
Department of Physical Chemistry — University of Chemistry and Technology, Department of Measurement — Czech Technical University in Prague et University of Pardubice, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.