Effect of the electrolyte concentration and substrate on conducting polymer actuators.
Langmuir
; 30(13): 3894-904, 2014 Apr 08.
Article
in En
| MEDLINE
| ID: mdl-24605916
ABSTRACT
The effect of the electrolyte concentration (NaCl aqueous electrolyte) on the dimensional variations of films of polypyrrole doped with dodecylbenzenesulfonate PPy(DBS) on Pt and Au wires was studied. Any parallel reaction that occurs during the redox polymeric reaction that drives the mechanical actuation, as detected from the coulovoltammetric responses, was avoided by using Pt wires as substrate and controlling the potential limits, thus significantly increasing the actuator lifetime. The NaCl concentration of the electrolyte, when studied by cyclic voltammetry or chronoamperometry, has a strong effect on the performance as well. A maximum expansion was achieved in 0.3 M aqueous solution. The consumed oxidation and reduction charges control the fully reversible dimensional variations PPy(DBS) films are faradaic polymeric motors. Parallel to the faradaic exchange of the cations, osmotic, electrophoretic, and structural changes play an important role for the water exchange and volume change of PPy(DBS).
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polymers
/
Pyrroles
/
Benzenesulfonates
/
Water
/
Sodium Chloride
Language:
En
Journal:
Langmuir
Journal subject:
QUIMICA
Year:
2014
Document type:
Article
Affiliation country:
Spain
Publication country:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA