Polysaccharides as Green Biodegradable Platforms for Building‐up Electroactive Composite Materials: An Overview

Simas, Fernanda Fogagnoli; Grein-Iankovski, Aline; Vidotti, Marcio; Riegel‐Vidotti, Izabel C.

doi:10.1002/9781119441632.ch97

Cited by 1 publication

(1 citation statement)

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“…Polysaccharides comprise some of the most abundant biopolymers on Earth [5,12]. Polysaccharides, such as starch, heparin, cellulose, chitosan, hyaluronic acid or agar, among others, have been blended, doped, combined or otherwise manipulated with suitable substrates to produce ion conducting materials [12][13][14][15][16][17][18][19]. A popular strategy for the production of novel SPEs based on polysaccharide host polymers is to dope them with ionic liquids (ILs).…”

Section: Introductionmentioning

confidence: 99%

Proton conducting electrolytes composed of chondroitin sulfate polysaccharide and citric acid

Santos

Barbosa

Pereira

et al. 2020

European Polymer Journal

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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).

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