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TitlePoly(ε-caprolactone)/siloxane biohybrids with applications in "smart windows"
Author(s)Rodrigues, L. C.
Silva, Maria Manuela
Smith, Michael John
Gonçalves, A.
Fortunato, E.
KeywordsSolid polymer electrolyte
Ionic conductivity
Thermal analysis
Electrochemical stability
Electrochromic devices
Issue date2012
JournalSynthetic Metals
Abstract(s)In view of the potential technological impact of solid polymer electrolytes (SPEs) in the domain of solid-state electrochemistry, particularly in the production of advanced batteries, sensors and electrochromic and photoelectrochemical devices, the sub-class of SPE materials has attracted considerable interest during the last two decades. Li+-doped ormolyte systems obtained using the sol-gel method has been investigated in the last few years. In this study we have used conductivity measurements, cyclic voltammetry at a gold microelectrode and thermal analysis to characterize an electrolyte system based on a lithium perchlorate (LiClO4)-doped di-urethane cross-linked poly(ε-caprolactone)(PCL)/siloxane hybrid matrix. The PCL/siloxane host hybrid matrix represents an attractive alternative, as it is expected to have lower environmental impact than electrolytes currently used in commercial devices. The biocompatible, biodegradable and air-permeable properties of the PCL matrix have led to extensive application of this material in the manufacture of suture cord, artificial skin, re-sorbable prosthetic devices and as a container for drug delivery. The amorphous hybrid materials characterized in this study combine acceptable levels of ionic conductivity (9.58x10-6 and 2.53x10-4 at 25 and 90 °C, respectively) with low environmental impact. The authors of a previous publication, have concluded that organic-inorganic systems based on poly(ε-caprolactone) may be used as dual-function electrolyte/adhesive component in prototype solid-state electrochromic devices. This component provides significant advantages in optical performance, cycle lifetime and durability of the electrochromic devices relative to conventional liquid electrolytes.
AccessOpen access
Appears in Collections:CDQuim - Artigos (Papers)

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