Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment / Xiru Shao in COLORATION TECHNOLOGY, Vol. 140, N° 4 (08/2024)  

[article]  inCOLORATION TECHNOLOGY > Vol. 140, N° 4 (08/2024) . - p. 629-636 Titre : Exploration on energy-saved dyeing method for polyimide fabrics with alkali treatment Type de document : texte imprimé Auteurs : Xiru Shao, Auteur ; Xin Chen, Auteur ; Chen Xi, Auteur ; Chenchen Zhan, Auteur ; Xiaojing LV, Auteur ; Shan Jiang, Auteur ; Tao Zhang, Auteur ; Genyang Cao, Auteur Année de publication : 2024 Article en page(s) : p. 629-636 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bases (chimie) Caractérisation Énergie -- Consommation Fibres textiles -- Propriétés mécaniques Fibres textiles -- Propriétés physiques Polyimides Stabilité thermique Teinture -- Fibres textiles synthétiques Traction (mécanique) Index. décimale : 667.3 Teinture et impression des tissus Résumé : The difficulty of dyeing is a disturbing problem for the various application of polyimide fabrics. Alkali treatment has been widely used as a preliminary step before dyeing, denoted as a two-bath method. With more attention being paid to energy resources, this work aims to explore more economical and environmentally friendly dyeing technology, combining the alkali treatment and the dyeing process together, named a one-bath method. Surprisingly, the K/S value of the one-bath dyed fabric is much higher than that of the two-bath sample, in which the red colour value is enhanced by 59.9% for the one-bath sample. As for the effect of dyeing on the physical properties, the two-step method has been demonstrated to exert more severe damage on the fibre, with lower crystallinity and tensile strength. To explain such results, it is deduced that when alkali is added together with dyes, it can play a bridge role between the dyes and the fibre, anchoring the dyes wherever the alkali can permeate. Furthermore, 17.25 J of the energy is calculated to be saved for the dyeing of 60 g of fabric, which is very inspiring for large-scale application. Note de contenu : - MATERIALS AND METHODS : Materials - Dyeing - Characterisations - RESULTS AND DISCUSSION : Surface morphologies - Dyeing properties - Physical properties - Tensile properties - Thermal stability - The possible mechanism of the one-bath dyeing method - Energy consumption DOI : https://doi.org/10.1111/cote.12733 En ligne : https://drive.google.com/file/d/1I95JXGKchoJ8b_SHwGN9YoT3pJBDwOJr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41323 [article]

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Preparation of UV-curable nano-SiO2/ acrylate coatings modified by P-containing LEPB and their applications on plywood / Xiaojing LV in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 2031-2044 Titre : Preparation of UV-curable nano-SiO2/ acrylate coatings modified by P-containing LEPB and their applications on plywood Type de document : texte imprimé Auteurs : Xiaojing LV, Auteur ; Jinwei Wang, Auteur ; Yong Guo, Auteur ; Yanxin Guo, Auteur Année de publication : 2023 Article en page(s) : p. 2031-2044 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs Caractérisation Composés organiques -- Synthèse Dioxyde de silicium Nanoparticules Phosphore Polyacryliques Polybutadiène époxydé Résistance à l'humidité:Résistance à l'eau Résistance à l'usure Résistance à la flamme Résistance aux taches Revêtements -- Additifs Revêtements -- Propriétés mécaniques Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : Phosphorus-containing liquid epoxidate polybutadiene (PDCP-LEPB) is synthesized and used as a reactive additive to improve the water, wear and fire resistance of UV-curable acrylate coatings containing nano-SiO2 as a filler. The structure of PDCP-LEPB and the curing condition are confirmed by Fourier transform infrared spectroscopy (FTIR). The addition of PDCP-LEPB should be controlled at around 10% as shown by thermal stability measurements; with the addition of PDCP-LEPB, composites show earlier degradation to release flame-retardant components, and thus the fire resistance of plywood is improved when its surface is applied by the composite coatings containing PDCP-LEPB. Besides, the fire protecting ability can be greatly enhanced with SiO2 addition due to the synergistic effect of P, Si and Cl coexistence in the matrix. The addition of PDCP-LEPB improves the water resistance of plywood as reflected by the water absorption rates, contact angle measurements and stain resistance test due to the hydrophobic nature of olefin backbone and increment of crosslinking density; the addition of nano-SiO2 has a much more positive effect on the improvement in their stain resistance and wear resistance due to the increase in surface roughness and stiffness, respectively. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of PDCP-LEPB - Preparation of UV-curable samples - Characterizations - RESULTS AND DISCUSSION : Characterization of PDCP-LEPB - Thermal stability and fire resistance evaluation - Water and stain resistance - Mechanical performances - Table 1 : The mass variations of each formula of modified UV-curable polyacrylates - Table 2 : Absorption assignments for FTIR spectra of LEPB, PDCP and PDCP-LEPB - Table 3 : Absorption assignments for FTIR spectra of PDCP-LEPB, neat acrylate and cured composites - Table 4 : TGA data based DOI : https://doi.org/10.1007/s11998-023-00799-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00799-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40179 [article]

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