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Regenerated cellulose properties tailored for optimized triboelectric output and the effect of counter-tribolayers
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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15
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Cellulose, Volume 31, issue 4, pp. 2047-2061
Abstract
Cellulose has shown great potential in the development of green triboelectric nanogenerators. Particularly, regenerated cellulose (R-cellulose) has shown remarkably high output power density but the structural features and key parameters that explain such superior performance remain unexplored. In this work, wood cellulose fibers were dissolved in a LiOH(aq)-based solvent to produce a series of R-cellulose films. Regeneration in different alcohols (from methanol to n-pentanol) was performed and the films’ structural features and triboelectric performance were assessed. Nonsolvents of increased hydrophobicity led to R-cellulose films with a more pronounced (1–10) diffraction peak. An open-circuit voltage (VOC) of up to ca. 260 V and a short-circuit current (ISC) of up to ca. 150 µA were measured for R-cellulose against polytetrafluoroethylene (as negative counter-layer). However, R-cellulose showed an increased VOC of 175% (from 88.1 V) against polydimethylsiloxane when increasing the alcohol hydrocarbon chain length from methanol to n-pentanol. The corresponding ISC and output power also increased by 76% (from 89.9 µA) and by 382% (from 8.8 W m–2), respectively. The higher R-cellulose hydrophilicity, combined with soft counter-tribolayer that follow the surface structures increasing the effective contact area, are the leading reasons for a superior triboelectric performance. Graphic abstract: (Figure presented.).
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| openaire: EC/H2020/788489/EU//BioELCell
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Dahlström, C, Eivazi, A, Nejström, M, Zhang, R, Pettersson, T, Iftikhar, H, Rojas, O J, Medronho, B & Norgren, M 2024, 'Regenerated cellulose properties tailored for optimized triboelectric output and the effect of counter-tribolayers', Cellulose, vol. 31, no. 4, pp. 2047-2061. https://doi.org/10.1007/s10570-024-05745-8