FT-IR study of dopant-wool interactions during PPy deposition

Varesano, Alessio; Aluigi, Annalisa; Tonin, Claudio; Ferrero, Franco

doi:10.1007/bf02908253

Cited by 31 publications

(24 citation statements)

References 23 publications

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“…The band at 1036 cm -1 is characteristic of the dopant, being attributable to the vibration of the aryl sulfonate salt. The band at 960 cm -1 has been assigned to a fraction of PPy free from the influence of the dopant [9]. The spectrum of the PPycoated silk yarn with 16.8 % weight increase showed a FT-IR pattern closely similar to pure PPy, with a very weak absorption in the amide I range at 1626 cm -1 attributable to silk.…”

Section: Morphological Properties Of Ppy Coated Silk Samplesmentioning

confidence: 98%

“…Comparatively less attention has been paid to other man-made fibers, such as polyamide [1] or cellulose-based regenerated fibers, like viscose, cupro, and lyocell [4,5]. As far as natural fibers are concerned, cotton [2,6,7] and, more recently, wool have attracted a great deal of attention [8][9][10].…”

Section: Introductionmentioning

confidence: 98%

“…Varesano et al [8,9] recently reported the in situ oxidative polymerization of pyrrole on wool with the aim to produce electrical conductive textiles for apparel and technical end-uses. Shrink resist treated fibers were found more suitable than untreated wool fibers as substrate for pyrrole polymerization.…”

Section: Introductionmentioning

confidence: 99%

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Properties and performance of polypyrrole (PPy)-coated silk fibers

Boschi¹,

Arosio²,

Cucchi

et al. 2008

Fibers Polym

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Different silk substrates in form of spun silk tops, nonwoven web, yarn, and fabric were coated with electrically conducting doped polypyrrole (PPy) by in situ oxidative polymerization from an aqueous solution of pyrrole (Py) at room temperature using FeCl 3 as catalyst. PPy-coated silk materials were characterized by optical (OM) and scanning electron (SEM) microscopy, FT-IR spectroscopy, and thermal analysis (DSC, TG). OM and SEM showed that PPy completely coated the surface of individual silk fibers and that the polymerization process occurred only at the fiber surface and not in the bulk. Dendrite-like aggregates of PPy adhered to the fiber surface, with the exception of the sample first polymerized in the form of tops and then spun into yarn using conventional industrial machines. FT-IR (ATR mode) showed a mixed spectral pattern with bands typical of silk and PPy overlapping over the entire wavenumbers range. DSC and TG showed that PPy-coated silk fibers attained a significantly higher thermal stability owing to the protective effect of the PPy layer against thermal degradation. The mechanical properties of silk fibers remained unchanged upon polymerization of Py. The different PPy-coated silk materials displayed excellent electrical properties. After exposition to atmospheric oxygen for two years a residual conductivity of 10-20 % was recorded. The conductivity decreased sharply under the conditions of domestic washing with water, while it remained essentially unchanged upon dry cleaning. Abrasion tests caused a limited increase of resistance. PPy-coated silk tops were successfully spun into yarn either pure or in blend with untreated silk fibers. The resulting yarns maintained good electrical properties.

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Section: Morphological Properties Of Ppy Coated Silk Samplesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

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Properties and performance of polypyrrole (PPy)-coated silk fibers

Boschi¹,

Arosio²,

Cucchi

et al. 2008

Fibers Polym

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“…The most pressing technical issue is the low adhesion of the PPy layer to the fiber surface. PPy has shown excellent affinity to cellulose‐based fibers14–16 and to treated animal fibers (e.g., Hercosett wool and Basolan wool) 2, 17. On the contrary, the adhesion to synthetic fibers is poor, and few are reported in literature.…”

Section: Introductionmentioning

confidence: 99%

Enhanced adhesion of conductive coating on plasma‐treated polyester fabric: A study on the ageing effect

Montarsolo

Varesano

Mossotti

et al. 2012

J of Applied Polymer Sci

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In recent years, there has been growing attention on intrinsically conducting polymers, such as polypyrrole (PPy) because of the wide range of possible applications. Adhesion to other materials is a pending problem that could be tackled by enhancing the chemical affinity of the surface toward PPy coating. In this work, low‐temperature plasma pretreatments were used for improving adhesion of PPy on polyester (PET) fabrics by changing the surface chemistry and generating a microscopically rough surface. Oxygen and argon plasmas were used to treat both sides of PET fabrics before PPy deposition by in situ chemical polymerization. Moreover, PPy depositions were performed 1 h, 1 week, and 1 month after the plasma treatments to study possible ageing effects. Different chemical/physical characterizations (contact angle, surface energy, atomic force microscopy, and X‐ray photoelectron spectroscopy) showed the efficacy of plasma pretreatments in inducing wettability on PET fabrics and promoting adhesion of the PPy layer. The enhanced adhesion was confirmed by abrasion tests and subsequent surface resistivity and color measurements. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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“…It has already been characterized for certain purposes such as: biomedical applications [5], pH sensing devices [6], conducting textiles [7,8] and for membranes from aqueous solutions [9].…”

Section: Introductionmentioning

confidence: 99%

Pyrrole thin films deposited on paper by pulsed RF plasma

Şahin

2007

Open Chemistry

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Attempts were made to plasma deposit an oriented π-conjugated polymer of pyrrole (Py) on paper surfaces in order to produce electrically conductive layers. The N/C atomic ratio of 0.13 − 0.24 was observed for all treatment conditions. This implies the nature of the deposition formed on the paper surface via pulsed plasma is different from that of pyrrole monomer. An increase in conductivity of all pyrrole-plasma treated papers was observed. The 50 W RF-power with 5 min plasma exposed paper sample shows 8.15 × 10 −9 S·cm −1 conductivity. The conductivity measurements indicated a plasmaenhanced ring-opening reaction mechanism of pyrrole.

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FT-IR study of dopant-wool interactions during PPy deposition

Cited by 31 publications

References 23 publications

Properties and performance of polypyrrole (PPy)-coated silk fibers

Properties and performance of polypyrrole (PPy)-coated silk fibers

Enhanced adhesion of conductive coating on plasma‐treated polyester fabric: A study on the ageing effect

Pyrrole thin films deposited on paper by pulsed RF plasma

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