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Interaction of N-methylformanilide with high-performance polyimide fibre and its effect on dyeing / Dongyan Shao in COLORATION TECHNOLOGY, Vol. 138, N° 4 (08/2022)
[article]
Titre : Interaction of N-methylformanilide with high-performance polyimide fibre and its effect on dyeing Type de document : texte imprimé Auteurs : Dongyan Shao, Auteur ; Jinmei Du, Auteur ; Changhai Xu, Auteur ; Hongbo Wang, Auteur Année de publication : 2022 Article en page(s) : p. 407-416 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
N-méthylformanilide
Polyimides
Teinture -- Fibres textiles synthétiques
Traitement thermiqueIndex. décimale : 667.3 Teinture et impression des tissus Résumé : High-performance polyimide fibre is well known for its outstanding thermal stability, fire resistance and chemical stability, and it has great potential for use in fire-protective textiles. One major drawback of polyimide fibre is that it is difficult to dye under regular conditions. In this work, it was found that polyimide fibre could be dyed with disperse dyes with the assistance of N-methylformanilide. Thus, it was proposed that there might exist an interaction between polyimide fibre and N-methylformanilide that plays an important role in dyeing. Experimental results showed that N-methylformanilide penetrated into polyimide fibre, resulting in a slight swell in diameter and decrease in the breaking strength of polyimide fibre. X-ray diffractometric data showed no apparent solvent-introduced increase on the crystallinity of polyimide fibres but an orderly change on the interplanar spacing. When N-methylformanilide was removed from polyimide fibre by thermal treatment, the diameter, breaking strength and interplanar spacing of the polyimide fibres were all recovered to some extent. This indicated that the interactions between polyimide macromolecular chains were broken because of the penetration of N-methylformanilide, and new interactions occurred between polyimide macromolecular chains and N-methylformanilide that played a role in lubricating dye molecules to diffuse into polyimide fibres. Note de contenu : - MATERIALS AND METHODS : Materials - Dyeing of PI fibres - PI fibres treated with MFA - Thermal treatment of PI fibres - Characterisation
- RESULTS AND DISCUSSION : Dyeing properties of PI fibres with MFA - Effect of MFA on PI fibre - Thermal treatment of MFA-treated PI fibre - Swelling mechanism
- Table 1 : Parameters of XRD patterns of PI fibresDOI : https://doi.org/10.1111/cote.12602 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12602 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37893
in COLORATION TECHNOLOGY > Vol. 138, N° 4 (08/2022) . - p. 407-416[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23520 - Périodique Bibliothèque principale Documentaires Disponible A new method for determination of the relative colour strength of dye based on new colour depth formula. Part II: application to different batches of colourant / Wanzi Xie in COLORATION TECHNOLOGY, Vol. 139, N° 1 (02/2023)
[article]
Titre : A new method for determination of the relative colour strength of dye based on new colour depth formula. Part II: application to different batches of colourant Type de document : texte imprimé Auteurs : Wanzi Xie, Auteur ; Hongbo Wang, Auteur ; Hongying Yang, Auteur ; Jingjing Zhang, Auteur ; Mengyuan Qi, Auteur Année de publication : 2023 Article en page(s) : p. 68-78 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Analyse
Colorimétrie
Réflectance
Saturation (colorimétrie)Index. décimale : 667.3 Teinture et impression des tissus Résumé : As a standard for the evaluation of relative colour strength (RCS) of dye, AATCC EP-6 (SWL [K/S], SUM, and WSUM) has been widely used, while its limitations are often overlooked by people. In Part I of this study, the new method Yangn (CSV1, CSV2, and CSV3) for the determination of RCS were proposed, Yangn and AATCC EP-6 were tested using the different types of disperse dyes that have approximate hues. However, the calculations of RCS for the same dyes produced in different batches were also necessary, therefore, this article (Part II) focuses on it. The HL series dyes produced in 2020 and 2021 were used to test Yangn and AATCC EP-6. The same results as Part I, the colour strength values calculated by SWL, SUM, and WSUM were inconsistent. Furthermore, in the methods of AATCC EP-6, the colour strength values calculated by WSUM should be at least rounded to four decimal places to avoid false calculation; the value of Yangn only need to be rounded to two decimal places. For the RCS of the same dyes produced in different batches, the methods of AATCC EP-6 and Yangn were relatively the same under different dyeing concentrations. The coefficient of variation (CV) values of Yangn were < 1.3%, the CV values of AATCC EP-6 were < 2%. Therefore, according to the consistency of the calculation, the CV values and the dependence on the concentration, the new methods of Yangn were superior to the traditional methods. Note de contenu :
- EXPERIMENTAL : Materials - Dyeing - Colour measurement
- RESULTS AND DISCUSSIONS : The RCS of E-type dyes - The relative colour strength of SE-type dyes - Further check
- Table 2 : Dyeing concentrations of E-type and SE-type disperse dyes
- Table 3 : The test conditions of colour measuring
- Table 4 : Ranking of the colour strength values calculated by SWL, SUM, and WSUM
- Table 5 : The relative colour strength (RCS) calculated by X-Rite Colour i7 and author for 0.1 owf (%) concentration
- Table 6 : The coefficient of variation (CV) values of the relative colour strength (RCS) of the dyes produced in 2020 and 2021 calculated by AATCC EP-6 and Yangn
- Table 7 : The reflectance factor values of the E-type dyes at the maximum absorption
- Table 8 : The coefficient of variation (CV) values of the relative colour strength (RCS) of the E-type dyes in the range 10–25%
- Table 9 : The coefficient of variation (CV) values of the relative colour strength (RCS) of the SE-type dyes produced in 2020 and 2021 at eight dye concentrations calculated by AATCC EP-6 and Yangn
- Table 10 : The coefficient of variation (CV) values of the relative colour strength (RCS) of the SE-type dyes in the range 10–25%
- Table 11 : The reflectance factor values of the SE-type dyes at the maximum absorption
- Table 12 : The average coefficient of variation (CV) values of the relative colour strength (RCS) from the study of Part I and Part IIDOI : https://doi.org/10.1111/cote.12636 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12636 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39206
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Code-barres Cote Support Localisation Section Disponibilité 24084 - Périodique Bibliothèque principale Documentaires Disponible A new method for determining relative colour strength of dye based on new colour depth formulas. Part I : For different dyes with approximate hue / Wanzi Xie in COLORATION TECHNOLOGY, Vol. 138, N° 5 (10/2022)
[article]
Titre : A new method for determining relative colour strength of dye based on new colour depth formulas. Part I : For different dyes with approximate hue Type de document : texte imprimé Auteurs : Wanzi Xie, Auteur ; Hongbo Wang, Auteur ; Jingjing Zhang, Auteur ; Mengyuan Qi, Auteur Année de publication : 2022 Article en page(s) : p. 474-484 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Analyse
Colorimétrie
Teinture -- Fibres textilesTags : Colorant 'Intensité relative' 'Profondeur de la couleur' 'Teinture textile' Index. décimale : 667.9 Revêtements et enduits Résumé : Relative colour strength (RCS) of dye plays an important role in the production, the evaluation and the application of dyes. There are different standards on the determination of it, their principles are all related to colour depth. However, the standard methods have some limitations. For this purpose, this study proposed a new method for the RCS based on the new colour depth formula Yangn, which included three methods named colour strength value (CSV1, CSV2 and CSV3). Part I in this study was to investigate the application effect of Yangn on the RCS of different disperse dyes with approximate hues. According to the experimental results of E-type and SE-type disperse dyes, the new method showed its advantages. Firstly, compared with AATCC EP-6, the results of the new method were more consistent. Secondly, under different dyeing concentrations, the RCS values of the new method were relatively consistent, with average coefficient values (CVs) being less than 5%, especially for CSV3 with only 3.59%; while all the average CVs of AATCC EP-6 were greater than 6%. For the calculation of RCS of different types of dyes with approximate hue, the new method presented more accurate results. Note de contenu : - INTRODUCTION : Significance of relative colour strength of dye - Colour strength value - RCS of dye
- NEW METHODS FOR RCS : The new colour depth formulas Yangn - New formula of RCS
- EXPERIMENTAL : Materials - Calculation
- RESULTS AND DISCUSSION : The calculations of E-type disperse dyes - The calculations of SE-type disperse dyes - Further check
- Table 1 : Names of experimental disperse dyes
- Table 2: Dyeing concentrations of E-type and SE-type disperse dyes
- Table 3 : Ranking of the colour strength values calculated by SWL, SUM and WSUM
Table 4 : The variation coefficient values (CVs) of the relative colour strength (RCS) of E-HL series and E-N series dyes calculated by AATCC EP-6 and Yangn
- Table 5 : The variation coefficient values (CVs) of the relative colour strength (RCS) of SE-HL series and SE-N series dyes calculated by AATCC EP-6 and Yangn
- Table 6 : The deviations of hue angle (Δh°) of HL-series and N-series dyes
- Table 7 : The coefficient values (CVs) of relative colour strength (RCS) of all HL-series and N-series dyes calculated by the AATCC EP-6 and YangnDOI : https://doi.org/10.1111/cote.12623 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12623 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38122
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Code-barres Cote Support Localisation Section Disponibilité 23613 - Périodique Bibliothèque principale Documentaires Disponible Preparation and characterization of silver nanocomposite textile / Hongbo Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
[article]
Titre : Preparation and characterization of silver nanocomposite textile Type de document : texte imprimé Auteurs : Hongbo Wang, Auteur ; Jinyan Wang, Auteur ; Jianhan Hong, Auteur ; Qufu Wei, Auteur ; Weidong Gao, Auteur ; Zhifeng Zhu, Auteur Année de publication : 2007 Article en page(s) : p. 101-106 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Argent
Caractérisation
Composites à fibres
Conducteurs organiques
Conduction électrique
Fibres textiles synthétiques
Fibres textiles synthétiques -- Propriétés électriques
Métallisation
Morphologie (matériaux)
Nanostructures
Nontissés
PolyoléfinesUne polyoléfine, parfois appelée polyalcène, désigne un polymère aliphatique saturé, synthétique, issu de la polymérisation d'une oléfine (aussi appelée un alcène) telle l'éthylène et ses dérivés.
La formule générale est -(CH2-CRR')n-, où R et R' peuvent être l'atome d'hydrogène (H) ou les radicaux alkyle apolaires CH3, CH2-CH3, CH2-CH(CH3)2. Il existe aussi des mousses isolantes souples faites à partir de polyoléfine (pour l'isolation thermique de tuyaux plastiques par exemple).
PRESENTATION : Les polyoléfines forment la plus importante famille de matières plastiques, avec quatre représentants (PP, HDPE, LDPE, LLDPE) parmi les plastiques de grande consommation. La consommation mondiale de ces quatre polymères est évaluée à plus de 60 millions de tonnes en 20001.
Seul un petit nombre de polyoléfines a atteint le niveau industriel :
les polyoléfines thermoplastiques semi-cristallines : polyéthylène (PE), polypropylène (PP), polyméthylpentène (PMP), polybutène-1 (PB-1) ;
les polyoléfines élastomères : polyisobutylène (PIB), éthylène-propylène (EPR ou EPM) et éthylène-propylène-diène monomère (EPDM).
PROPRIETES : En raison de leur nature paraffinique, les polyoléfines sont hydrophobes et possèdent en général une grande inertie chimique (aux solvants, acides, bases, etc.). Ces matériaux ont donc une qualité alimentaire. Le collage est très difficile (la surface est particulièrement inerte, des traitements de surface spéciaux sont nécessaires).
Cependant, ils sont sensibles à l'action des UV, et résistent très peu à l'inflammation car leur indice limite d'oxygène est faible (exemple : ILO ~ 17 pour le polyéthylène).
Leur densité est très faible [0,83 (cas du PMP) < d < 0,95] : ils flottent dans l'eau.
Ils sont opaques, sauf le PMP (transparent).
Polypropylène
Projection au plasmaIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanostructured silver films of different thicknesses were deposited on surfaces of polypropylene nonwovens by magnetron sputter coating to obtain antibacterial and electrical conductive properties. The surface morphology of nanostructured silver films was investigated by atomic force microscopy (AFM). The antibacterial properties of the nonwovens coated with relatively thinner films were evaluated using the shake flask test. The conductivity of the nonwovens coated with relatively thicker films was examined using an ohm-meter. The results of the antibacterial test revealed that the antibacterial performance improved gradually as the film thickness increased from 0.5 to 3 nm. It is believed that the total amount of silver ions released from the coating was increased along with the increase in film thickness. As sputtering time prolonged, the grain sizes of the silver particles were increased and the coating became more compact. The results of the electrical conductivity test showed that the increased film thickness led to the improved electrical conductivity when the film was relatively thicker. The AFM images clearly revealed the change in surface morphology formed by sputter coating. The growth and coverage of the coating layer contributed to the improvement in its antibacterial and conductive properties. DOI : 10.1007/s11998-007-9001-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9001-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3675
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