Biomaterials, Biodegradables and Biomimetics Research Group

Papers in Scientific Journals

Starch-based polymer-IL composites formed by compression moulding and supercritical fluid foaming for self-supported conductive material

Abstract

In this work, blend of starch and poly-e-caprolactone (PCL) doped with different concentrations of 1-butyl-3-methylimidazolium acetate ([BMIM]Ac) or 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) was studied. The blends were characterized by mechanical analysis, infra-red spectroscopy (FTIR), differential scanning calorimetry (DSC) and dielectric relaxation spectroscopy (DRS), evaluating the IL doping effect. The samples were submitted to supercritical carbon dioxide foaming and the morphology of the structures was assessed. DSC shows a single glass transition and melting endotherm for foamed and unfoamed samples, undergoing no effect upon IL doping, and DRS shows increased molecular mobility for blends with higher IL concentrations, and some hindrance for lower ones. Conductivity for SPCL doped with 30% [BMIM]Cl, before and after foaming, is comparable to conductivity of the IL but exhibiting more stable conductivity values, opening doors for  applications as self-supported conductive materials.

Journal
RSC Advances
Volume
4
Issue
33
Pagination
17161-17170.
Keywords
biopolymers, conductivity, ionic liquids, supercritical fluids
Rights
Restricted Access
Peer Reviewed
Yes
Status
published
Project
ENiGMA
Year of Publication
2014
DOI
0.1039/c4ra01424c
Date Published
2014-03-19
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