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Ultrastrong Ionotronic Films Showing Electrochemical Osmotic Actuation
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Biocomposites.ORCID iD: 0000-0003-2168-4504
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. School of Materials Science and Engineering, Ocean University of China, Qingdao, Shandong, 266100, China, Shandong.ORCID iD: 0000-0003-3497-2054
A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-2489-8439
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2023 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 35, no 45, article id 2301163Article in journal (Refereed) Published
Abstract [en]

A multifunctional soft material with high ionic and electrical conductivity, combined with high mechanical properties and the ability to change shape can enable bioinspired responsive devices and systems. The incorporation of all these characteristics in a single material is very challenging, as the improvement of one property tends to reduce other properties. Here, a nanocomposite film based on charged, high-aspect-ratio 1D flexible nanocellulose fibrils, and 2D Ti3C2Tx MXene is presented. The self-assembly process results in a stratified structure with the nanoparticles aligned in-plane, providing high ionotronic conductivity and mechanical strength, as well as large water uptake. In hydrogel form with 20 wt% liquid, the electrical conductivity is over 200 S cm−1 and the in-plane tensile strength is close to 100 MPa. This multifunctional performance results from the uniquely layered composite structure at nano- and mesoscales. A new type of electrical soft actuator is assembled where voltage as low as ±1 V resulted in osmotic effects and giant reversible out-of-plane swelling, reaching 85% strain.

Place, publisher, year, edition, pages
Wiley , 2023. Vol. 35, no 45, article id 2301163
Keywords [en]
cellulose nanofibrils, hydrogel actuators, ionotronic conductivity, MXenes, nanocomposite films
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-348452DOI: 10.1002/adma.202301163ISI: 001047337200001Scopus ID: 2-s2.0-85167665653OAI: oai:DiVA.org:kth-348452DiVA, id: diva2:1876198
Note

QC 20240624

Available from: 2024-06-24 Created: 2024-06-24 Last updated: 2024-06-24Bibliographically approved

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Li, LengwanTian, WeiqianRostami, JowanChen, BinRam, FarsaPettersson, TorbjörnWågberg, LarsBenselfelt, TobiasBerglund, LarsHamedi, Mahiar

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Li, LengwanTian, WeiqianRostami, JowanChen, BinRam, FarsaPettersson, TorbjörnWågberg, LarsBenselfelt, TobiasBerglund, LarsHamedi, Mahiar
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Wallenberg Wood Science CenterBiocompositesFibre Technology
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