Authors Pötschke, P. ; Villmow, T. ; Andres, T. ; Kobashi, K. ; Rentenberger, R. ; Brünig, H. ; Fischer, D. ; Häußler, L.
Title Melt processed polymer - carbon nanotube composites as materials for liquid sensing applications
Date 04.05.2009
Number 19723
Abstract In this study the possibility to use melt prepared composites containing multiwalled carbon nanotubes (MWNT) for liquid sensing purposes was examined. As an example poly(lactic acid)-MWNT composites exhibiting good MWNT dispersion were compression molded to thin films as well as melt spun to fibers using different take-up velocities. As a second composite system, compression molded films of polymer blends of poly(propylene)and poly(caprolactone) with different MWNT contents having varied phase fractions were investigated. The electrical resistance changes caused by contact with different solvents like n-hexane, toluene, chloroform, tetrahydrofuran, dichloromethane, ethanol, and water were recorded for immersion/drying cycles. The resistance of melt pressed films reversibly changed upon the cycles with good reproducibility. The sensitivity towards resistance change during solvent contact decreased with increasing MWNT content, with increasing difference between the solubility parameters of solvent and polymer, and in the fibers with higher orientation of the MWNTs due to increased take-up velocity.
Publisher Polymer Preprints
Citation Polymer Preprints 50 (2009) 419-420

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