Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/91172
Title: Proton conducting electrolytes composed of chondroitin sulfate polysaccharide and citric acid
Authors: Santos, Filipe M.
Barbosa, Paula C.
Pereira, Rui F. P. 
Silva, M. Manuela
Gonçalves, Helena M.R.
Nunes, Sílvia C.
Figueiredo, Filipe L.
Valente, Artur J. M. 
Bermudez, Verónica de Zea
Keywords: Chondroitin sulfate; Biopolymer electrolytesIonic conductivity; Citric acid
Issue Date: 5-Feb-2020
Project: info:eu-repo/grantAgreement/FCT/UID/FIS/04650/2013 
info:eu-repo/grantAgreement/FCT/UID/QUI/00686/2013 
info:eu-repo/grantAgreement/FCT/UID/QUI/50006/2019 
info:eu-repo/grantAgreement/FCT/UID/QUI/00686/2016 
info:eu-repo/grantAgreement/POCI-01-0145-FEDER-016422 
info:eu-repo/grantAgreement/SAICTPAC/0032/2015 
info:eu-repo/grantAgreement/FCT/UID/CTM/50011/2019) 
info:eu-repo/grantAgreement/FCT/UID/CTM/50025/2013 
info:eu-repo/grantAgreement/Pest-OE/QUI/UI0616/2014 
info:eu-repo/grantAgreement/PTDC/CTM/NAN/0956/20149 
info:eu-repo/grantAgreement/POCI-01-0145-FEDER-016884 
info:eu-repo/grantAgreement/FCT/SFRH/BPD/87759/2012 
info:eu-repo/grantAgreement/NORTE-01-0145-FEDER-030858 
info:eu-repo/grantAgreement/PTDC/BTM-MAT/30858/2017 
Serial title, monograph or event: European Polymer Journal
Volume: 124
Abstract: Novel electrolytes composed of chondroitin sulfate A (CSA) and citric acid (CA) have been prepared using a clean, safe, and fast route. These electrolytes exhibit different physical-chemical properties, depending on the amount of CA. For X > 82.3%, where X is the mass ratio, in %, of CA/(CA + CSA), whitish polycrystalline powders result. Lower amounts of CA leads to the production of translucent, amorphous films, sticky for X = 75.6 and 82.0, brittle for X < 43.6 and crack-free, self-standing for 43.6 < X < 75.6%. The results obtained provide evidence that, at low pH, strong hydrogen bonding interactions take place between the anionic sulfonic and carboxylic groups of CSA and CA. CA exerts a key role, acting as a cross-linker and proton source, while simultaneously influencing sample morphology. At room temperature the highest ionic conductivity is achieved at X = 60.8%. A significant enhancement of the ionic conductivity of this sample occurs with the increase of relative humidity (RH) (from 3.1 × 10−7 to 3.7 × 10−2 S cm−1 30% for RH = 30 and ~100%, respectively).
URI: http://hdl.handle.net/10316/91172
ISSN: 00143057
DOI: 10.1016/j.eurpolymj.2019.109453
Rights: embargoedAccess
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat Login
EPJ2020.pdf3.4 MBAdobe PDFEmbargo Access    Request a copy
Show full item record

Page view(s)

19
checked on Oct 22, 2020

Google ScholarTM

Check

Altmetric

Altmetric


This item is licensed under a Creative Commons License Creative Commons