The development of polyamide 6.6 nanofibres with a pH-sensitive function by electrospinning

Schueren, Lien Van der; Mollet, Tybo; Ceylan, Özgür; Clerck, Karen De

doi:10.1016/j.eurpolymj.2010.09.016

Cited by 76 publications

(46 citation statements)

References 19 publications

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“…Our specific interest in calculating p K a values arises from the development of novel sensor materials: halochromic (pH‐sensitive) dyes can be incorporated into polymeric structures to give pH‐sensitive polymers that can be used in wound bandages, protective clothing, and so on . In recent developments, these dye molecules were modified to include reactive or polymerizable groups .…”

Section: Introductionmentioning

confidence: 99%

“…Our specific interest in calculating pK a values arises from the development of novel sensor materials:h alochromic( pH-sensitive) dyes can be incorporated into polymeric structures to give pH-sensitive polymers that can be used in woundb andages, protectivec lothing, and so on. [1][2][3][4][5][6][7][8][9][10] In recent developments,t hese dye molecules were modified to include reactive or polymerizable groups. [11] This resulted in am aterial for which the dye was covalently bound to the host material, which greatly improved the leaching properties.…”

Section: Introductionmentioning

confidence: 99%

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Acidity Constant (pK_a) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

et al. 2016

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AbstractpH‐Sensitive dyes are increasingly applied on polymer substrates for the creation of novel sensor materials. Recently, these dye molecules were modified to form a covalent bond with the polymer host. This had a large influence on the pH‐sensitive properties, in particular on the acidity constant (pK a). Obtaining molecular control over the factors that influence the pK a value is mandatory for the future intelligent design of sensor materials. Herein, we show that advanced molecular dynamics (MD) methods have reached the level at which the pK a values of large solvated dye molecules can be predicted with high accuracy. Two MD methods were used in this work: steered or restrained MD and the insertion/deletion scheme. Both were first calibrated on a set of phenol derivatives and afterwards applied to the dye molecule bromothymol blue. Excellent agreement with experimental values was obtained, which opens perspectives for using these methods for designing dye molecules.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acidity Constant (pK_a) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

et al. 2016

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“…The jet is stable only at the region close to the tip of the needle, after which jet instabilities are observed. In the jet trajectory from the needle to the collector, the solvent evaporates and dry fibers are deposited on the collector plate as an interconnected network 1,11,15 . The collected fibers are typically in the form of a blanket 5,7,11 .…”

Section: Introductionmentioning

confidence: 99%

Electrospinning of Gelatin/Poly (Vinyl Pyrrolidone) Blends from Water/Acetic Acid Solutions

2015

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Electrospinning is a versatile and efficient technique for obtaining polymeric microfibers and nanofibers with great potential for applications in tissue engineering, biosensors, filtration, wound dressings, controlled drug release and enzyme immobilization. Electrospun fibers are obtained by applying an electric field in a polymer solution resulting in non-woven fibrous mats with high surface area relative to volume and high porosity. In this work, the electrospinning of gelatin/poly(vinyl pyrrolidone) (PVP) blends was investigated. The polymers were electrospun from solutions containing different concentrations of water and acetic acid. Solutions were characterized by measuring the pH, electrical conductivity, surface tension and viscosity. The influence of acetic acid concentration in solution properties and its influence in the spinnability were investigated. The resulting non-woven membranes were characterized by using scanning electron microscopy (SEM), thermogravimetric analysis (TG) and cytotoxicity.

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“…[17][18][19][20][21][22][23] One of the many applications of such textile sensors is in wound dressings. [11] These textile sensors maintain all advantages of textile materials, meaning they are flexible, applicable on large surfaces and can give a local signal, in particular local discolouration.…”

Section: Introductionmentioning

confidence: 99%

Substituent effects on absorption spectra of pH indicators: An experimental and computational study of sulfonphthaleine dyes

Meyer

Hemelsoet²,

Speybroeck³

et al. 2014

Dyes and Pigments

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Sulfonphthaleine dyes are an important class of pH indicators, finding applications in novel (textile) sensors. In this paper, we present a combined experimental and theoretical study to elucidate the halochromic behaviour of a large set of sulfonphthaleine compounds. Starting from an experimental analysis consisting of UV/Vis spectroscopy, the pH region and the absorption wavelengths related to the colour shift are obtained and pK a values are derived. The effect of the substituents on the pH region can be traced back to their electron donating/withdrawing properties. Time-Dependent Density Functional Theory (TD-DFT) is able to adequately produce the trend in experimental wavelengths. Proton affinities are used to assess the effect of substituents on the pH region. The combination of theory and experiment is able to give a better understanding of the pH sensitivity; the methodology in this work will be useful in future dye design and is applicable to other dye classes as well.

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The development of polyamide 6.6 nanofibres with a pH-sensitive function by electrospinning

Cited by 76 publications

References 19 publications

Acidity Constant (pK_a) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

Acidity Constant (pK_a) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

Electrospinning of Gelatin/Poly (Vinyl Pyrrolidone) Blends from Water/Acetic Acid Solutions

Substituent effects on absorption spectra of pH indicators: An experimental and computational study of sulfonphthaleine dyes

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The development of polyamide 6.6 nanofibres with a pH-sensitive function by electrospinning

Cited by 76 publications

References 19 publications

Acidity Constant (pKa) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

Acidity Constant (pKa) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

Electrospinning of Gelatin/Poly (Vinyl Pyrrolidone) Blends from Water/Acetic Acid Solutions

Substituent effects on absorption spectra of pH indicators: An experimental and computational study of sulfonphthaleine dyes

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Acidity Constant (pK_a) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods

Acidity Constant (pK_a) Calculation of Large Solvated Dye Molecules: Evaluation of Two Advanced Molecular Dynamics Methods