Properties of a new nitrogen-free additive as an alternative to urea and its application in reactive printing / Chenglong Wang in COLORATION TECHNOLOGY, Vol. 138, N° 2 (04/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 2 (04/2022) . - p. 137-145 Titre : Properties of a new nitrogen-free additive as an alternative to urea and its application in reactive printing Type de document : texte imprimé Auteurs : Chenglong Wang, Auteur ; Yongfang Xian, Auteur ; Hongmei Wang, Auteur ; Minghua Wu, Auteur ; Yijia Wang, Auteur ; Deyou yu, Auteur ; Lili Wang, Auteur Année de publication : 2022 Article en page(s) : p. 137-145 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs Bleu (couleur) Colorants réactifs Eaux usées -- Teneur en azote ammoniacal Eaux usées -- Teneur en azote total Formulation (Génie chimique) Impression sur étoffes Pâtes d'impression Produits chimiques -- Suppression ou remplacement Sérigraphie Solidité de la couleur Teinture -- Fibres textiles Urée Viscose Index. décimale : 667.3 Teinture et impression des tissus Résumé : The development of a urea substitute with little nitrogen has become a hot research topic for cleaner production in reactive printing. In the current study, a mixture made from glycerol and 1,4-butanediol (1:1, w/w), namely, urea substitute glycerol butanediol (USGB), was used instead of urea in the printing paste formulation. USGB’s abilities of moisture adsorption, swelling fibres and solubilisation to reactive dyes were compared with those of urea. The printing properties of USGB on different fabrics with reactive dyes were intensively investigated in comparison with urea and commercial 391-H. The results showed that USGB’s ability to swell viscose fibres was superior to that of urea. When the dosage of USGB was within 8-10 wt% in the printing paste, the colour yield of USGB on viscose fabrics drew near to that of urea and was higher than that of 391-H. During viscose printing of reactive blue dyes with different shades and structures, the colour performance of USGB was close to that of urea and higher than that of 391-H. Furthermore, USGB could obtain good printing effects in deep printing with Reactive Turquoise K-GL on different fabrics. Compared with urea, the content of ammonia-nitrogen and total nitrogen in the printing wastewater using USGB were greatly reduced, which is of huge significance for lowering ammonia-nitrogen emissions in the printing industry. Note de contenu : - EXPERIMENTAL : Materials - Determination of the hybroscopicity, swellability and solubility of printing additives - Reactive printing pastes - Screen printing technique - Printing performance of the printed fabrics - RESULTS AND DISCUSSION : The hygroscopicity, swellability and solubility of printing additives - Colour performances of printing additives with different dosages in reactive printing - Colour performances of printing additives in different printing pastes - Colour performances of printing additives in viscose printing of different reactive dyes - Table 1 : The formula of reactive printing paste - Table 2 : Hygroscopicity, swellability of viscose fibre ans solubilisation to reactive turquoise K-GL using urea and urea substitute glycerol butanediol (USGB) as printing additives - Table 3 : Colour performances of urea, urea substitue glycerol butanediol (USGB) and 391-H on different fabrics during deep printing with Reactive Turquoise K-GL - Table 4 : Hand parameters of the printed fabrics using urea, urea substitute glycerol butanediol (USGB) and 391-H as printing additives during deep printing with Reactive Turquoise K-GL - Table 5 : Colour fastness of the printed fabrics using urea, urea substitute glycerol butanediol (USGB) and 391-H as printing additives during deep printing with Reactive Turquoise K-GL - Table 6 : Ammonia-nitrogen and total nitrogen content in reactive printing wastewater DOI : https://doi.org/10.1111/cote.12576 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12576 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37844 [article]

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Structure of vinyl polysiloxane on properties of polyacrylates filmm and its pigment printing application / Qipeng Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 937-948 Titre : Structure of vinyl polysiloxane on properties of polyacrylates filmm and its pigment printing application Type de document : texte imprimé Auteurs : Qipeng Zhang, Auteur ; Minghua Wu, Auteur Année de publication : 2020 Article en page(s) : p. 937-948 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Caractérisation Copolymères -- Synthèse Copolymères greffés Couches minces -- Propriétés mécaniques Energie de surface Impression pigmentaire Impression sur étoffes Latex Liants Mesure Poids moléculaires Polyacrylates Polymérisation en émulsion Polyméthylvinylsiloxane Séparation (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Polysiloxane is a promising modified material due to its good hydrophobicity and toughness, but it suffers from serious uneven distribution and migration during film formation process which gradually lead to the destruction of the hydrophobic structure. A novel silicon-modified copolymer with different molecular weight and vinyl content was synthesized to overcome this problem: an appropriate amount of double bonds between the polysiloxane backbone ensures uniform distribution. Moreover, a multicrosslinked network binder was prepared by miniemulsion polymerization of the polyacrylate copolymers and polysiloxane. Unlike the common crosslinked network of an uneven distribution and migration of silicone backbone, the polysiloxane with suitable crosslinking degree and molecular weight could be effectively distributed evenly during the film formation process. As a result, a better hydrophobicity and toughness performance (89.7° ± 0.5°, 2500% elongation at break) was achieved with this novel poly(methylvinylsiloxane) with 11,024 g/mol at 0.804 mmol/g vinyl content. The product was applied to pigment printing with better wet rubbing fastness and soft handle compared with the unmodified polyacrylates binder. The DSC, SAXS, and XPS indicated that high molecular organosilicon chain and moderate vinyl content were prone to phase separation and obviously shifted onto the surface of film, enriching a uniform organosilicon layer, which played a vital role in the surface hydrophobicity and mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of poly(methylvinylsiloxane - Polymerization - Pigment printing - Measurements - RESULTS AND DISCUSSION : Synthesis and structure of poly(methylvinylsiloxane) - Characterization of different latexes - Characterization of modified polyacrylate films - Degree of grafting of Vi-PDMS to polyacrylates - Microphase separation - Surface composition - Contact angles and surface energy - Mechanical properties of the films - Textile pigment printing applications DOI : https://doi.org/10.1007/s11998-020-00320-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00320-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34382 [article]

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