Electrospinning and Photocrosslinking of Highly Modified Fungal Chitosan

Christ, Henrik‐Alexander; Menzel, Henning

doi:10.1002/mame.202200430

Cited by 4 publications

(2 citation statements)

References 61 publications

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“…Test of Electrospinnability and Fabrication of Electrospun COC fibers: For the production of electrospun COC fibers, a custom-made electrospinning machine, as has been reported before in the previous work, was applied. [33] The spinning solution was filled into a 5 mL syringe. After removing all bubbles from the solution, the syringe was equipped with a stainless-steel nozzle.…”

Section: Methodsmentioning

confidence: 99%

“…[32] The viscoelasticity of the polymer solution can counteract the bending instabilities and suppress the chaotic whipping. [20,28,33] When the occurrence of chaotic whipping is fully suppressed, the jet will travel only in a straight path to the collector, and thus highly aligned fibers can be obtained. [17,18,34] This process is then called stable jet electrospinning (SJES).…”

Section: Single-solvent Systemsmentioning

confidence: 99%

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Electrospinning of Cyclic Olefin Copolymer for the Production of Highly Aligned Dye‐Doped Optical Fibers

Li,

Menzel

2023

Macro Materials & Eng

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Cyclic olefin copolymer (COC, Topas 5013, with 75% norbornene) has special properties like high glass transition temperature, low moisture uptake, chemical inertness, and a high degree of transmission in UV range, making it competitive with other materials such as poly (methyl methacrylate) and polycarbonate for the production of optical devices. Electrospinning provides a facile way to produce fibers. In order to generate highly aligned fibers fulfilling the requirements for optical applications, stable‐jet electrospinning can be used, in which the bending instabilities are suppressed. However, electrospinning of COC fibers by is still a major challenge due to the lack of suitable solvents. The influence of various solvents on the fiber formation is investigated. The addition of salts enhances the spinnability of the COC solution. By utilizing binary‐solvent systems with the ratio of 2:8 (v/v), morphology and alignment of fibers are significantly improved, as visualized via scanning electron microscopy. The binary‐solvent systems that content nonpolar and polar solvents also provide dispersibility for both organic dyes and inorganic nanoplatelets with hydrophobic ligand shells. By adding such dyes and nanoplatelets during fiber fabrication process, dye‐doped COC fibers can be produced without compromising the optical performance of the dyes and nanoplatelets.

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Section: Methodsmentioning

confidence: 99%

Section: Single-solvent Systemsmentioning

confidence: 99%

Electrospinning of Cyclic Olefin Copolymer for the Production of Highly Aligned Dye‐Doped Optical Fibers

Li,

Menzel

2023

Macro Materials & Eng

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Application of electrospun chitosan-based nanofibers as immobilization matrix for biomolecules

Christ,

Daniel,

Solarczek

et al. 2023

Appl Microbiol Biotechnol

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Nanofiber meshes from electrospun chitosan, highly modified with biotin and arylazides, are well-suited for application as enzyme immobilization matrices. To test this, catalytically active biomolecules were immobilized onto photocrosslinked nanofibrous nonwovens consisting mainly of biotinylated fungal chitosan and a small amount (10 w%) of poly ethylene oxide. In this study, we show that over 10 μg eugenol oxidase per milligram dry polymer matrix can be loaded on UV-crosslinked chitosan nanofibers. We further demonstrate that bound enzyme activity can be fully retained for over 7 days of storage at ambient conditions in aqueous buffer. Samples loaded at maximum enzyme carrying capacity were tested in a custom-made plug-flow reactor system with online UV-VIS spectroscopy for activity determination. High wettability and durability of the hydrophilic chitosan support matrix enabled continuous oxidation of model substrate vanillyl alcohol into vanillin with constant turnover at flow rates of up to 0.24 L/h for over 6 h. This proves the above hypothesis and enables further application of the fibers as stacked microfluidic membranes, biosensors, or structural starting points for affinity crosslinked enzyme gels. Key points •Biotinylated chitosan-based nanofibers retain enzymes via mild affinity interactions •Immobilized eugenol oxidase shows high activity and resists continuous washing •Nanofiber matrix material tolerated high flow rates in a continuous-flow setup Graphical Abstract

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Developments of Core/Shell Chitosan-Based Nanofibers by Electrospinning Techniques: A Review

Taokaew,

Chuenkaek

2024

Fibers

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This review is focused on the recent development of various chitosan-based nanofibers (membranes, patches, mats, and scaffolds) that have been designed into core and shell structures using emulsion and coaxial electrospinning techniques. Chitosan, a promising polysaccharide derived from natural sources, holds potential for diverse applications, including nanofiber production, aimed at fostering sustainability. Core/shell chitosan-based nanofibers offer appealing features, including drug encapsulation and sustained release capabilities, with a higher efficiency than uniaxial fibers. The fabrication of core/shell chitosan-based nanofibers, including the co-spinning agents and various spinning parameters, such as spinning voltage, needle size, spinning flow rate, distance from needle tip to collector, temperature, and humidity, is summarized in this work. The review also explores updated applications in various fields, such as textiles, medical dressings, drug release systems, filtration membranes, and food packaging. It highlights the current advancements in core/shell chitosan-based nanofibers produced via electrospinning techniques. The innovative insights presented in the recent literature and the challenges associated with these sustainable materials are thoroughly examined, offering valuable contributions to the field.

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Electrospinning and Photocrosslinking of Highly Modified Fungal Chitosan

Cited by 4 publications

References 61 publications

Electrospinning of Cyclic Olefin Copolymer for the Production of Highly Aligned Dye‐Doped Optical Fibers

Electrospinning of Cyclic Olefin Copolymer for the Production of Highly Aligned Dye‐Doped Optical Fibers

Application of electrospun chitosan-based nanofibers as immobilization matrix for biomolecules

Developments of Core/Shell Chitosan-Based Nanofibers by Electrospinning Techniques: A Review

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