Nanotechnology and Functional Materials
Conducting cellulose-based composites
Conductive polymers have been in the focus for the past 30 years since their discovery. They exhibit excellent conductive properties and can be used in a multitude of applications including electrochemically controlled ion-exchange membranes, supercapacitors and batteries, sensor devices, etc. By polymerizing polypyrrole on large specific surface area Cladophora cellulose, one can obtain a flexible, moldable paper material with high ion sorption capacity. In several sub projects we tailor and characterize cellulose based conducting polymer composites for use in electrochemically controlled ion-exchange membranes for separation of biologically active substances, e.g. oligonucleotides, DNA, batteries and supercapacitors.
Selected references:
- Toward Flexible Polymer and Paper-based Energy Storage Devices
L. Nyholm, G. Nyström, A. Mihranyan and M. Strømme
Adv. Mater (2011) accepted for publication - Spatial Mapping of Elemental Distributions in Polypyrrole-Cellulose Nanofibers using Energy Filtered Transmission Electron Microscopy
S. Rubino, A. Razaq, L. Nyholm, M. Strømme, K. Leifer, A. Mihranyan.
J. Phys Chem 114 (2010) 13644–13649 - The Salt and Paper Battery; Ultrafast and All-polymer Based
G. Nyström, A. Razaq, A. Mihranyan, L. Nyholm and M. Strømme
Mater. Res. Soc. Symp. Proc. 1197 (2010) 41-46A - Nanocellulose Polypyrrole Composite based on Microfibrillated Cellulose from Wood
G. Nyström, A. Mihranyan, A. Razaq, T. Lindström, L. Nyholm and M. Strømme
J. Phys.Chem. B 114 (2010) 4178-4182 - Ultrafast All-Polymer Paper-Based Batteries
G. Nyström, A. Razaq, M. Strømme, L. Nyholm, A. Mihranyan
Nano Letters 9 (2009) 3635–3639 - Influence of the type of oxidant on anion exchange properties of fibrous Cladophora cellulose/polypyrrole composites
A. Razaq, A. Mihranyan, K. Welch, L. Nyholm, M. Strømme
J. Phys. Chem B 113 (2009) 426-433 - Ionic motion in polypyrrole-cellulose composites: Trap release mechanism during potentiostatic reduction
M. Strømme, G. Frenning, A. Razaq, K. Gelin, L. Nyholm and A. Mihranyan
J. Phys. Chem B 113 (2009) 4582-4589. - Potential Controlled Anion Absorption in a novel high surface-area Composite of Cladophora Cellulose and Polypyrrole
K. Gelin, A. Mihranyan, A. Razaq, Nyholm, M. Strømme
Electrochimica Acta 54 (2009) 3394-3401 - A Novel High Specific Surface Area Conducting Paper Material Composed of Polypyrrole and Cladophora Cellulose
A. Mihranyan, L. Nyholm, A. E. Garcia Bennett and M. Strømme
J Phys Chem B 112 (2008) 12249-12255
We have previously also characterized the fundamental properties of Cladophora cellulose for use in a number of pharmaceutical applications
Selected references:
- What to do with all these algae?
Strømme, M., Mihranyan, A., and Ek., R. (2002).Materials Letters, 57(3), 569-572. - Sorption of nicotine to cellulose powders
Mihranyan, A., Andresson, S.-B., and Ek., R. (2004).European Journal of Pharmaceutical Sciences, 22 (4), 279-286. - Rheological properties of cellulose hydrogels prepared from Cladophora cellulose powder
Mihranyan, A., Edsman, K., Strømme, M. (2007).Food Hydrocolloids, 21(2), 267-272.
Cladophora algae collected at sea.
SEM picture of Cladophora fibres.
For more information, please contact Albert Mihranyan.