authors |
Nunes, SC; Saraiva, SM; Pereira, RFP; Silva, MM; Carlos, LD; Almeida, P; Goncalves, MC; Ferreira, RAS; Bermudez, VD |
nationality |
International |
journal |
MOLECULES |
author keywords |
kappa-carrageenan; structure; biopolymer electrolyte; thermal properties; ionic conductivity; luminescence features |
keywords |
IOTA-CARRAGEENAN; POLYMER ELECTROLYTE; GEL ELECTROLYTE; SMART WINDOWS; BIOPOLYMER; CONDUCTIVITY; CHITOSAN; TRANSITION; DEVICES |
abstract |
In recent years, the synthesis of polymer electrolyte systems derived from biopolymers for the development of sustainable green electrochemical devices has attracted great attention. Here electrolytes based on the red seaweeds-derived polysaccharide kappa-carrageenan (kappa-Cg) doped with neodymium triflate (NdTrif(3)) and glycerol (Gly) were obtained by means of a simple, clean, fast, and low-cost procedure. The aim was to produce near-infrared (NIR)-emitting materials with improved thermal and mechanical properties, and enhanced ionic conductivity. Cg has a particular interest, due to the fact that it is a renewable, cost-effective natural polymer and has the ability of gelling in the presence of certain alkali- and alkaline-earth metal cations, being good candidates as host matrices for accommodating guest cations. The as-synthesised kappa-Cg-based membranes are semi-crystalline, reveal essentially a homogeneous texture, and exhibit ionic conductivity values 1-2 orders of magnitude higher than those of the kappa-Cg matrix. A maximum ionic conductivity was achieved for 50 wt.% Gly/kappa-Cg and 20 wt.% NdTrif(3)/kappa-Cg (1.03 x 10(-4), 3.03 x 10(-4), and 1.69 x 10(-4) S cm(-1) at 30, 60, and 97 degrees C, respectively). The NdTrif-based kappa-Cg membranes are multi-wavelength emitters from the ultraviolet (UV)/visible to the NIR regions, due to the kappa-Cg intrinsic emission and to Nd3+, F-4(3/2)-> I-4(11/2-9/2). |
publisher |
MDPI |
issn |
1420-3049 |
year published |
2019 |
volume |
24 |
issue |
6 |
digital object identifier (doi) |
10.3390/molecules24061020 |
web of science category |
Biochemistry & Molecular Biology; Chemistry, Multidisciplinary |
subject category |
Biochemistry & Molecular Biology; Chemistry |
unique article identifier |
WOS:000464290200007
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ciceco authors
impact metrics
journal analysis (jcr 2019):
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journal impact factor |
3.267 |
5 year journal impact factor |
3.589 |
category normalized journal impact factor percentile |
56.714 |
dimensions (citation analysis):
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altmetrics (social interaction):
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