Projects per year
Abstract
One-dimensional (1D) nanomaterials of conductive polypyrrole (PPy) are competitive biomaterials for constructing bioelectronics to interface with biological systems. Synergistic synthesis using lignocellulose nanofibrils (LCNF) as a structural template in chemical oxidation of pyrrole with Fe(III) ions facilitates surface-confined polymerization of pyrrole on the nanofibril surface within a submicrometer- and micrometer-scale fibril length. It yields a core-shell nanocomposite of PPy@LCNF, wherein the surface of each individual fibril is coated with a thin nanoscale layer of PPy. A highly positive surface charge originating from protonated PPy gives this 1D nanomaterial a durable aqueous dispersity. The fibril-fibril entanglement in the PPy@LCNFs facilely supported versatile downstream processing, e.g., spray thin-coating on glass, flexible membranes with robust mechanics, or three-dimensional cryogels. A high electrical conductivity in the magnitude of several to 12 S·cm -1 was confirmed for the solid-form PPy@LCNFs. The PPy@LCNFs are electroactive and show potential cycling capacity, encompassing a large capacitance. Dynamic control of the doping/undoping process by applying an electric field combines electronic and ionic conductivity through the PPy@LCNFs. The low cytotoxicity of the material is confirmed in noncontact cell culture of human dermal fibroblasts. This study underpins the promises for this nanocomposite PPy@LCNF as a smart platform nanomaterial in constructing interfacing bioelectronics.
Original language | English |
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Pages (from-to) | 3819-3834 |
Number of pages | 16 |
Journal | Biomacromolecules |
Volume | 24 |
Issue number | 8 |
DOIs | |
Publication status | Published - 14 Aug 2023 |
MoE publication type | A1 Journal article-refereed |
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Åbo Akademi Functional Printing Center
Toivakka, M. (PI), Rosenholm, J. (PI), Anttu, N. (PI), Bobacka, J. (PI), Huynh, T. P. (PI), Peltonen, J. (PI), Wang, X. (PI), Wilen, C.-E. (PI), Xu, C. (PI), Zhang, H. (PI) & Österbacka, R. (PI)
Faculty of Science and EngineeringFacility/equipment: Facility
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SusCellInk: Sustainable nanocellulose-based bioinks towards diverse material functionalities and therapeutic delivery of bioactive cues
Wang, X. (Principal Investigator)
01/09/20 → 31/08/25
Project: Research Council of Finland/Other Research Councils
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3D CelluGel : 3D CelluGel - Novel Bioinks 100% Based on Finnish Trees
Xu, C. (Principal Investigator) & Wang, X. (Co-Principal Investigator)
01/09/22 → 31/08/24
Project: Industry/Business Finland
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AMBioPharma: Centre for Additive Manufacturing for Life Science and Pharmaceutical Industry
Rosenholm, J. (Principal Investigator), Xu, C. (Principal Investigator), Wang, X. (Co-Investigator) & Palo, M. (Co-Investigator)
01/09/21 → 31/08/23
Project: EU