Photochromic Nanofibers

Kumbasar, E. Perrin Akçakoca; Morsunbul, Seniha; Alir, S

doi:10.5772/intechopen.74663

Cited by 6 publications

(4 citation statements)

References 58 publications

(80 reference statements)

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“…Photochromic fibers can be developed through various methods, such as electrospinning, wet-spinning, and melt-spinning [31]. Kumbasar et al reviewed the production of photochromic nanofibers using photochromic compounds and polymer matrices [32]. However, producing lightresponsive textiles is still complex, as dyestuffs are sensitive to heat, limiting the maximum temperature in the melt-spinning processes.…”

Section: Introductionmentioning

confidence: 99%

Photoresponsive Electrospun Polycaprolactone Nanofibrous Structure Embedding Dithienylethene Molecules

Aden,

Rault,

Salaün

2024

Coatings

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Photochromic polycaprolactone (PCL) nanofibers were prepared through electrospinning. Various factors, including the solvent system, the concentration of PCL, the viscosity of the solution, and the electrical conductivity, influence the morphology of PCL nanofibers. A binary solvent system can dissolve PCL, control fiber structure and morphology, and allow solvent evaporation. The photochromic properties of electrospun membranes based on PCL and diethienylethene (DTE) were assessed using the CM-3610a spectrophotometer. The study showed that incorporating DTE into the membrane enables photochromic performance, with the photochromic reaction being reversible. The analysis of the color-change kinetics showed that the mechanism of photo cycling during colorization was linked to the amplitude of the fast and slow mechanisms, which depended on the formulation tested. The study showed that the photoreversion of the membrane under visible illumination occurs according to first-order kinetics. This work presented the design and manufacturing of photochromic membranes through electrospinning, which offers rapid color change rates, adjustable color fade times, superior reversibility, and reproducibility over at least 10 cycles. The thermochromic properties are proportional to the DTE concentration used, making it possible to obtain color variations with a delta E of 13 and 38 for concentrations ranging from 0.95 to 11.4 wt.%.

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Section: Introductionmentioning

confidence: 99%

Photoresponsive Electrospun Polycaprolactone Nanofibrous Structure Embedding Dithienylethene Molecules

Aden,

Rault,

Salaün

2024

Coatings

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“…A wide range of dynamic materials is becoming of increasing interest in terms of their applications as optical sensors [32][33][34][35][36][37]. Designing light-responsive optical fibers for optoelectronic applications (photoswitchers, optical data storage, holographic recordings, 3D imagining, UV irradiation sensors, active optical fibers-all sensitive to environmental conditions) using such materials has the advantages of enhanced sensitivity and fast response time to light [2,38,39]. Such outstanding properties can be achieved with a high ratio between the fiber surface and its volume.…”

Section: Introductionmentioning

confidence: 99%

A Spiropyran-Doped Poly(methyl methacrylate) Matrix for Sensor Applications

Askirka,

Miluski,

Kochanowicz

2023

Electronics

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In this paper, the relaxation isomerization properties of a spiropyran-doped poly(methyl methacrylate) (PMMA) UV light-responsive dynamic material are presented. The polar liquid (acetonitrile) and solid (PMMA matrix) medium may contain two merocyanine isoforms of the selected spiropyran. A complex equilibrium of the colored and colorless spiropyran isoforms resulted in specific transformations of the absorption spectra during the relaxation process. Bands at 522 nm and 580 nm characterized the absorption of the fabricated dynamic material in the ground (non-activated) state in the visible range. The presence of colored and colorless isoforms of spiropyran incorporated into the PMMA matrix using Raman spectroscopy was revealed. The photosensitive polymer samples were irradiated with a UV LED (365 nm and 390 nm) under various temperatures (0–30 °C). Spectral changes within the relaxation process demonstrated their complex dynamics. Surprisingly, the photodegradation of the dynamic material was estimated at about 25% (using 390 nm) and 7% (using 365 nm) after eight photoswitch cycles for one isoform, and no fatigue after an additional one (using 390 nm) was discovered. The presented light-responsive material is of interest for UV sensors and new hybrid material design.

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“…Photochromic dyes are colorless without UV light and they become colorful by changing their molecular structure under UV irradiation. This color changing is reversible thermally (T-type) or photochemically (P-type), thus the color disappears when the UV light source is removed [2]. Photochromic dyes are divided in many different classes while the photochromic dyes, which change their color based on pericyclic reactions, are more common to use in various industries such as glasses, cosmetics, plastics, textiles etc [1,3].…”

Section: Introductionmentioning

confidence: 99%

“…Photochromic dyes are divided in many different classes while the photochromic dyes, which change their color based on pericyclic reactions, are more common to use in various industries such as glasses, cosmetics, plastics, textiles etc [1,3]. These photochcromic dyes, which are spiropyrans, spirooxazines, naphthopyrans (chromenes), diarylethenes and fulgides, show photochromism effect by ring opening/closing reactions (Figure 1) [2,4,5]. These dyes differ in terms of photochromic properties, resistance to photodegradation (fatigue resistance), etc., depending on their structures [6].…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics in Textile Application of Photochromic Dye Capsules

Morsümbül

Kumbasar

2022

Tekstil Ve Konfeksiyon

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Photochromic dyes which change their color with UV light, are water insoluble and sensitive to the environmental conditions. In order to be able to use these dyes in textile industry, the dyes are encapsulated with a polymer, and then the encapsulated photochromic dyes are applied onto the textile materials. The encapsulated photochromic dyes can show different properties according to the photochromic dye and polymer type, capsule size and the encapsulation method applied. In this study, the performance characteristics of different commercial photochromic dye capsules were investigated after the application onto cotton fabrics by pad-cure process. It was observed that the fabrics still provide UV protection at 50 + UPF level even after 10 washing cycles. The photochromic fabrics lost their color and UV protective properties at most 16% and 4%, respectively after 20 UV on-off cycles.

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Photochromic Nanofibers

Cited by 6 publications

References 58 publications

Photoresponsive Electrospun Polycaprolactone Nanofibrous Structure Embedding Dithienylethene Molecules

Photoresponsive Electrospun Polycaprolactone Nanofibrous Structure Embedding Dithienylethene Molecules

A Spiropyran-Doped Poly(methyl methacrylate) Matrix for Sensor Applications

Performance Characteristics in Textile Application of Photochromic Dye Capsules

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