Blue core-shell nanospheres prepared by dyeing poly(styrene-co-methacrylic acid) dispersions / Kuanjun Fang in COLORATION TECHNOLOGY, Vol. 131, N° 6 (12/2015)  

[article]  inCOLORATION TECHNOLOGY > Vol. 131, N° 6 (12/2015) . - p. 458-463 Titre : Blue core-shell nanospheres prepared by dyeing poly(styrene-co-methacrylic acid) dispersions Type de document : texte imprimé Auteurs : Kuanjun Fang, Auteur ; Xiaojie Xua, Auteur ; Yuqing Cai, Auteur ; Longyun Hao, Auteur ; Jianbo Zhang, Auteur ; Yunguo Zhao, Auteur Année de publication : 2015 Article en page(s) : p. 458-463 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Copolymère styrène/acide méthacrylique Copolymères -- Synthèse Nanoparticules Polymères en émulsion Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Blue poly(styrene-co-methacrylic acid) nanospheres were prepared by dyeing polymer dispersions with CI Disperse Blue 56. The coloured nanospheres had a clear shell with a thickness of 32.5 nm. The average diameter of the nanospheres increased from 288 to 353 nm, and the glass transition temperature was raised from 109.6 to 117.9 °C after coloration. Ultraviolet-visible absorption spectra, transmission electron microscopy, and differential scanning calorimetry show that the amino and/or hydroxyl groups of the disperse dyes formed hydrogen bonds with the carboxyl groups on the surfaces of the nanospheres during the coloration process, resulting in increased particle sizes and shell layers. The dye content increased almost linearly with increasing dye concentrations or dyeing temperatures within a certain range. By increasing the pH of the dyeing bath from 4 to 5, the dye content increased sharply from 0.68 to 1.49% because of the ionisation of the carboxyl groups of the macromolecules. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of poly(styrene-co-methacrylic acid) nanosphere dispersions - Preparation and purification of coloured poly(styrene-co-methacrylic acid) nanospheres - Dye contents of the coloured nanospheres - Ultraviolet-visible measurements - Transmission electron microscopy - Differential scanning calorimetry - RESULTS AND DISCUSSION : Morphology of the poly(styrene-co-methacrylic acid) nanospheres - Glass transition temperatures - Ultraviolet-visible spectra of the coloured nanospheres - Dye contents of the coloured poly(styrene-co-methacrylic acid) nanospheres DOI : 10.1111/cote.12181 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12181 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25115 [article]

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