Chitosan for Sensors and Electrochemical Applications

Silva, Suse Botelho da; Batista, Guilherme Lopes; Santin, Cristiane Krause

doi:10.1002/9781119450467.ch18

Cited by 17 publications

(10 citation statements)

References 70 publications

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“…The enhanced properties of polymeric materials with metal oxide nanoparticles into composite electrodes have been optimized through the long, linear backbones of chitin and chitosan for electronic devices [121]. This type of synthesis has been conducted to create a hierarchical assembly which connects nanoscopic metal oxide particles to the macro-scale structure of chitosan through electrochemical deposition [122].…”

Section: Energetic Applications Of Chitin and Chitosanmentioning

confidence: 99%

Recent Advances in Chitin and Chitosan/Graphene-Based Bio-Nanocomposites for Energetic Applications

et al. 2021

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Herein, we report recent developments in order to explore chitin and chitosan derivatives for energy-related applications. This review summarizes an introduction to common polysaccharides such as cellulose, chitin or chitosan, and their connection with carbon nanomaterials (CNMs), such as bio-nanocomposites. Furthermore, we present their structural analysis followed by the fabrication of graphene-based nanocomposites. In addition, we demonstrate the role of these chitin- and chitosan-derived nanocomposites for energetic applications, including biosensors, batteries, fuel cells, supercapacitors and solar cell systems. Finally, current limitations and future application perspectives are entailed as well. This study establishes the impact of chitin- and chitosan-generated nanomaterials for potential, unexplored industrial applications.

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Section: Energetic Applications Of Chitin and Chitosanmentioning

confidence: 99%

Recent Advances in Chitin and Chitosan/Graphene-Based Bio-Nanocomposites for Energetic Applications

et al. 2021

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“…The plethora of amino and hydroxyl groups on the CS backbone endow the polymer with biodegradability and biocompatibility, while its hydrogen donor ability is responsible for its good electrical conductivity and good interaction with different ions; besides, good antimicrobial properties have also been reported. 95 Therefore, its chemical structure, as well as the fact that it is a basic polysaccharide, have contributed to its increased commercial interest, compared to other natural polymers, such as cellulose or alginate. 97 Indeed, CS represents an extremely versatile biopolymer for chemical modifications since, in addition to dynamic boronate ester bonds, imine bonds or Schiff-base linkages, 98,99 which occur between amino groups and aldehydes, are also used to modify chitosan.…”

Section: Focus On Chitosan-based Hydrogelsmentioning

confidence: 99%

“…CS, which is a random copolymer of d -glucosamine and N -acetyl-glucosamine, is obtained by the N -deacetylation of another polysaccharide, chitin . When the degree of deacetylation exceeds 50%, the amino groups of chitosan are protonated at a pH lower than 6.2, which transforms the polymer into a water-soluble electrolyte capable of interacting with negatively charged molecules. , On the other hand, under neutral or basic pH environments, the amino groups are deprotonated and engage in the formation of intermolecular and intramolecular hydrogen bonds with the hydroxyl groups, thus, allowing the construction of poorly water-soluble hydrogel networks.…”

Section: Focus On Chitosan-based Hydrogelsmentioning

confidence: 99%

Advanced Functional Hydrogel Biomaterials Based on Dynamic B–O Bonds and Polysaccharide Building Blocks

et al. 2020

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Dynamic covalent chemistry applied to polymers has attracted significant attention over the past decade. Within this area, this review highlights the recent research on polysaccharide-based hydrogels cross-linked by boronic-acid moieties, illustrating its versatility and relevance in biomaterials science to design self-healing, multiple stimuli-responsive, and adaptive biointerfaces and advanced functional devices. strategies and synthetic routes, compatibility with biological tissues, mechanical strength, high permeability to various solutes and high ionic conductivity) but, in addition, exhibit superior performance and cutting-edge properties. In particular, properties such as self-healing, 7 multiple stimuli-responsiveness, 8 and adaptive macroscale properties (shape-memory, stretchability, and reprocessability), [9][10][11] enable their use for real-world applications. 12 As the structure of physically cross-linked hydrogels is unstable under small environmental changes and present limited robustness, while the irreversible nature of chemical cross-links prevents their use in shear-thinning and self-healing applications, hydrogels based on dynamic covalent interactions have emerged as an attractive alternative to reach such high-value features. 13 Indeed, in comparison with non-covalent bonds (i.e. hydrogen bonds, 14,15 van der Waals interactions, 16 π-π stacking, 17 metal-ligand coordination, 18,19 electrostatic interactions, 20 or host-guest interactions 21 ), dynamic covalent chemistry exhibits higher stability and affords reversibility under specific conditions or stimuli. 22 The range of dynamic covalent chemistry that has been exploited to produce healable polymers includes nucleophilic substitutions, imine chemistry, Diels-Alder reactions, disulfide exchange chemistry, thiol-Michael exchange, transthioesterifications, boronic esters and boronates, Si-O exchange in siloxanes and silyl ethers, among others. 23 Briefly, the dynamic bond is a class of bond that can selectively, reversibly break and reform, under equilibrium conditions, without irreversible side reactions. 24 Dynamic covalent networks are influenced by external factors (such as temperature, water content, concentration, or the presence of Lewis bases, among others) and their components easily assemble and disassemble according to physicochemical cues. Due to their nature, dynamic bonds permit stress relaxation, material flow and higher stability, thus combining the advantages of both physically and

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“…Chitosan (CS) is a biopolymer (a polysaccharide) obtained by the partial deacetylation of chitin [101,102], with excellent nontoxicity, biocompatibility, biodegradability, multiple functional groups, pH-dependent solubility in aqueous media, cheapness and a susceptibility to chemical modification [103][104][105][106]. One of the most innovative application of chitosan and its derivatives is the development of specific sensors and electrochemical devices due to the chemical and electrical features, the interesting mechanical and biologic properties of the chitosan-based materials [107]. Although chitosan may present useful characteristics alone, many applications explore its use through chemical modifications or in composites, leading to materials that may present mixed characteristics or, in some cases, better performance due to synergic effects.…”

Section: Bioplastics and Biodegradable Plasticsmentioning

confidence: 99%

Polymers and Plastics Modified Electrodes for Biosensors: A Review

Lanzalaco

Molina

2020

Molecules

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Polymer materials offer several advantages as supports of biosensing platforms in terms of flexibility, weight, conformability, portability, cost, disposability and scope for integration. The present study reviews the field of electrochemical biosensors fabricated on modified plastics and polymers, focusing the attention, in the first part, on modified conducting polymers to improve sensitivity, selectivity, biocompatibility and mechanical properties, whereas the second part is dedicated to modified “environmentally friendly” polymers to improve the electrical properties. These ecofriendly polymers are divided into three main classes: bioplastics made from natural sources, biodegradable plastics made from traditional petrochemicals and eco/recycled plastics, which are made from recycled plastic materials rather than from raw petrochemicals. Finally, flexible and wearable lab-on-a-chip (LOC) biosensing devices, based on plastic supports, are also discussed. This review is timely due to the significant advances achieved over the last few years in the area of electrochemical biosensors based on modified polymers and aims to direct the readers to emerging trends in this field.

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Chitosan for Sensors and Electrochemical Applications

Cited by 17 publications

References 70 publications

Recent Advances in Chitin and Chitosan/Graphene-Based Bio-Nanocomposites for Energetic Applications

Recent Advances in Chitin and Chitosan/Graphene-Based Bio-Nanocomposites for Energetic Applications

Advanced Functional Hydrogel Biomaterials Based on Dynamic B–O Bonds and Polysaccharide Building Blocks

Polymers and Plastics Modified Electrodes for Biosensors: A Review

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