Properties of partially hydrolyzed PAN fibers

Chen, Zhaowen; Xu, Wei

doi:10.1007/s11458-009-0004-0

Cited by 10 publications

(4 citation statements)

References 3 publications

(3 reference statements)

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“…The control PAN fibre represented its primary functional peak at 2240 cm −1 attributed to the C≡N (nitrile group) and the secondary peaks at 1470 cm −1 and 2930 cm −1 are credited to the bending and stretching vibration of methylene groups, correspondingly 26 . The other functional groups have been found at 1070 cm −1 , 1350 cm −1 , and 1730 cm −1 because of the presence of C–CN groups, stretching of C–H in CH groups, and specific stretching and absorption of C=O in COOH groups, respectively 35 – 38 . For the WP hybrid fibres prepared with different weight ratios of wool content, it can be seen that amide-II (1530 cm −1 ), amide-A (3280 cm −1 ) groups from the wool powder have been diminished, which might be due to the proper dissolution of the wool powder in the alkaline organic solution 39 .…”

Section: Resultsmentioning

confidence: 99%

Graphene oxide incorporated waste wool/PAN hybrid fibres

Faruque

Remadevi

Guirguis

et al. 2021

Sci Rep

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This work aims to evaluate the potential of using textile waste in smart textile applications in the form of a hybrid fibre with electrical properties. The bio-based electrically conductive fibres were fabricated from waste wool and polyacrylonitrile (PAN) via wet spinning with different wool content. The control PAN and hybrid fibre produced with the highest amount of wool content (25% w/v) were coated with graphene oxide (GO) using the "brushing and drying" technique. The GO nanosheets coated control PAN and wool/PAN hybrid fibres were chemically reduced through hydrazine vapour exposure. The Fourier transform infrared spectroscopy showed the presence of both protein and nitrile peaks in the wool/PAN hybrid fibres, although the amide I and amide A groups had disappeared, due to the dissolution of wool. The morphological and structural analysis revealed effective coating and reduction of the fibres through GO nanosheets and hydrazine, respectively. The hybrid fibre showed higher electrical conductivity (~ 180 S/cm) compared to the control PAN fibres (~ 95 S/cm), confirming an effective bonding between the hydroxyl and carboxylic groups of the GO sheets and the amino groups of wool evidenced by chemical analysis. Hence, the graphene oxide incorporated wool/PAN hybrid fibres may provide a promising solution for eco-friendly smart textile applications.

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Section: Resultsmentioning

confidence: 99%

Graphene oxide incorporated waste wool/PAN hybrid fibres

Faruque

Remadevi

Guirguis

et al. 2021

Sci Rep

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“…The control PAN signified its functional peak at 2240 cm −1 , 1470 cm −1 , and 2930 cm −1 which are ascribed to the C≡N (nitrile group), bending and stretching vibration of methylene groups, correspondingly ( Supplementary Figure S3a ) [ 34 ]. The other functional groups have been found at 1070 cm −1 , 1350 cm −1, and 1730 cm −1 due to the C-CN groups, stretching of C-H in CH groups, stretching and absorption of C=O in COOH groups, respectively ( Supplementary Figure S3a ) [ 35 , 36 , 37 , 38 ]. On the other hand, the typical peaks of GO can be seen from 950 cm −1 to 1450 cm −1 , derived from the occurrence of C–O bonds of epoxy groups, hydroxyl groups, and other C-OH vibrations of carboxyl groups, with peaks at 1628 cm −1 , 1730 cm −1 , and 3280 cm −1 confirming the presence of C=C, C=O, and -OH groups, correspondingly ( Supplementary Figure S3b ) [ 19 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

A Facile Approach of Fabricating Electrically Conductive Knitted Fabrics Using Graphene Oxide and Textile-Based Waste Material

et al. 2021

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This research investigated a feasible approach to fabricating electrically conductive knitted fabrics using previously wet-spun wool/polyacrylonitrile (PAN) composite fibre. In the production of the composite fibre, waste wool fibres and PAN were used, whereby both the control PAN (100% PAN) and wool/PAN composite fibres (25% wool) were knitted into fabrics. The knitted fabrics were coated with graphene oxide (GO) using the brushing and drying technique and then chemically reduced using hydrazine to introduce the electrical conductivity. The morphological study showed the presence of GO sheets wrinkles on the coated fabrics and their absence on reduced fabrics, which supports successful coating and a reduction of GO. This was further confirmed by the colour change properties of the fabrics. The colour strength (K/S) of the reduced control PAN and wool/PAN fabrics increased by ~410% and ~270%, and the lightness (L*) decreased ~65% and ~71%, respectively, compared to their pristine fabrics. The Fourier transform infrared spectroscopy showed the presence and absence of the GO functional groups along with the PAN and amide groups in the GO-coated and reduced fabrics. Similarly, the X-ray diffraction analysis exhibited a typical 2θ peak at 10⁰ that represents the existence of GO, which was demolished after the reduction process. Moreover, the wool/PAN/reduced GO knitted fabrics showed higher electrical conductivity (~1.67 S/cm) compared to the control PAN/reduced GO knitted fabrics (~0.35 S/cm). This study shows the potential of fabricating electrically conductive fabrics using waste wool fibres and graphene that can be used in different application fields.

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“…Chen et al reported the properties of the partially hydrolyzed PAN. The difference in strength and thermal stability of PAN fiber with their partially hydrolyzed PAN‐COOH fibers was studied by this group . In 2011, Kim and co‐workers studied the increase in effect of alkaline hydrolysis and nitrile conversion kinetics using high‐resolution solid state 13 C NMR spectroscopy on commercially available hollow PAN ultrafiltration membrane (UF) surface…”

Section: Nitrile Group Modifications In Polymersmentioning

confidence: 99%

An overview of synthetic modification of nitrile group in polymers and applications

Sruthi

Anas

2020

Journal of Polymer Science

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The physicochemical properties of polymers are mainly dependent on the nature of polymer backbone and/or pendant groups linked to the main chain. Therefore, synthetic modification of these functional groups via post functionalization is an important approach for obtaining novel polymeric systems with improved properties and targeted applications. In this context, the synthetic modifications of nitrile group in polymers into various useful functionalities have received considerable attention and several interesting applications of the resulting polymers have been identified. The majority of the studies are based on Polyacrylonitrile (PAN), and some isolated examples of nitrile functionalization in copolymers such as Poly (Styrene-co-Acrylonitrile) (SAN), Poly (Acrylonitrile-co-Butadiene-co-Styrene (ABS) and Nitrile Rubber (NBR) are available. These synthetic modifications are mainly accomplished by the reactions such as Nucleophilic addition, cycloaddition, reduction, and hydrolysis using various reagents. These studies describing the post-polymerization modifications of nitrile group in polymers reported during the last three decades are covered in this review.

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Properties of partially hydrolyzed PAN fibers

Cited by 10 publications

References 3 publications

Graphene oxide incorporated waste wool/PAN hybrid fibres

Graphene oxide incorporated waste wool/PAN hybrid fibres

A Facile Approach of Fabricating Electrically Conductive Knitted Fabrics Using Graphene Oxide and Textile-Based Waste Material

An overview of synthetic modification of nitrile group in polymers and applications

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