Investigation of rGO and chitosan effects on optical and electrical properties of the conductive polymers for advanced applications

Özkan, Betül Çiçek; Soganci, Tugba; Turhan, Hüseyin; Ak, Metin

doi:10.1016/j.electacta.2018.11.032

Cited by 43 publications

(23 citation statements)

References 63 publications

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“…CS is a hydrophilic, semi-crystalline, linear polysaccharide produced from chitin obtained from living organisms such as shrimp, crabs, turtles and insects. 3,4 CS is recognized by the US Food and Drug Administration (FDA) as a generally safe food additive. In addition, biocompatible and biodegradable CS attracts attention with its non-toxicity, ionicity, antibacterial properties and its ability to form films.…”

Section: Introductionmentioning

confidence: 99%

Electrical, optical and mechanical properties of chitosan biocomposites

Mergen

Arda

Evingür

2019

Journal of Composite Materials

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In this work, chitosan/graphene nanoplatelets (CS/GNP) and chitosan/multi-walled carbon nanotube (CS/MWCNT) biocomposite films were prepared using a simple, eco-friendly and low-cost method. The electrical, optical and mechanical properties of these composite films were investigated. The optical, mechanical and electrical properties of the biocomposites were significantly improved, which make them promising materials for food packaging, ultraviolet protection and biomedical applications. With the increase of carbon filler content (GNP or MWCNT) in CS biocomposites, the surface conductivity ( σ), the scattered light intensity ( I sc) and the tensile modulus ( E) increased significantly. This behaviour in the electrical, optical and mechanical properties of the CS/carbon filler biocomposites was explained by percolation theory. The electrical percolation thresholds were determined as R σ = 25.0 wt.% for CS/GNP and R σ = 10.0 wt.% for CS/MWCNT biocomposites, while the optical percolation thresholds were found as R op =12.0 wt.% for CS/GNP and R op = 2.0 wt.% for CS/MWCNT biocomposites. Conversely, the mechanical percolation thresholds for both CS/GNP and CS/MWCNT biocomposites were found to be negligibly small ( R m = 0.0 wt.%). The electrical ( β σ), optical ( β op) and mechanical ( β m) critical exponents were calculated for both CS/carbon filler biocomposites and found compatible with the applied percolation theory.

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Section: Introductionmentioning

confidence: 99%

Electrical, optical and mechanical properties of chitosan biocomposites

Mergen

Arda

Evingür

2019

Journal of Composite Materials

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“…[14][15][16] The conductive network formed by conductive llers can usually improve the electrical properties of composites. Common conductive llers are metals, 17 carbon materials [18][19][20][21] (e.g., carbon black, fullerene, graphite, graphene, reduced graphene oxide (rGO), carbon nanotubes, carbon nanobers, and carbon nanowires), and conducting polymers. 22 Among them, graphene has large specic surface area, high aspect ratio, and excellent electrical properties and is currently a research hotspot for the preparation of functional polymer-based composites.…”

Section: Introductionmentioning

confidence: 99%

A reduced graphene oxide–borate compound-loaded melamine sponge/silicone rubber composite with ultra-high dielectric constant

Zhang

Dai

et al. 2019

RSC Adv.

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“…Conductive polymers are a new generation of smart materials extensively used in organic bioelectronics, mostly in the development of neural implants, biosensors, and active controlled release systems [1][2][3][4]. Poly (3,4-ethylenedioxythiophene) (PEDOT) is a conductive polymer synthetized from 3,4-ethylenedioxythiophene (EDOT), used as a coating in diverse types of sensors due to its biocompatibility, conductivity, processing versatility, and stability [5,6].…”

Section: Introductionmentioning

confidence: 99%

Polysaccharide κ-Carrageenan as Doping Agent in Conductive Coatings for Electrochemical Controlled Release of Dexamethasone at Therapeutic Doses

et al. 2020

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Smart conductive materials are developed in regenerative medicine to promote a controlled release profile of charged bioactive agents in the vicinity of implants. The incorporation and the active electrochemical release of the charged compounds into the organic conductive coating is achieved due to its intrinsic electrical properties. The anti-inflammatory drug dexamethasone was added during the polymerization, and its subsequent release at therapeutic doses was reached by electrical stimulation. In this work, a Poly (3,4-ethylenedioxythiophene): κ-carrageenan: dexamethasone film was prepared, and κ-carrageenan was incorporated to keep the electrochemical and physical stability of the electroactive matrix. The presence of κ-carrageenan and dexamethasone in the conductive film was confirmed by µ-Raman spectroscopy and their effect in the topographic was studied using profilometry. The dexamethasone release process was evaluated by cyclic voltammetry and High-Resolution mass spectrometry. In conclusion, κ-carrageenan as a doping agent improves the electrical properties of the conductive layer allowing the release of dexamethasone at therapeutic levels by electrochemical stimulation, providing a stable system to be used in organic bioelectronics systems.

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Investigation of rGO and chitosan effects on optical and electrical properties of the conductive polymers for advanced applications

Cited by 43 publications

References 63 publications

Electrical, optical and mechanical properties of chitosan biocomposites

Electrical, optical and mechanical properties of chitosan biocomposites

A reduced graphene oxide–borate compound-loaded melamine sponge/silicone rubber composite with ultra-high dielectric constant

Polysaccharide κ-Carrageenan as Doping Agent in Conductive Coatings for Electrochemical Controlled Release of Dexamethasone at Therapeutic Doses

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