Synthesis and characterization of ethylenediamine-modified F-44 phenolic epoxy fiber / Juan Wu in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 3 (2024)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 39, N° 3 (2024) . - p. 336-344 Titre : Synthesis and characterization of ethylenediamine-modified F-44 phenolic epoxy fiber Type de document : texte imprimé Auteurs : Juan Wu, Auteur ; Mingli Jiao, Auteur ; Hao Wang, Auteur ; Keke Li, Auteur ; Muen Yang, Auteur ; Pengyu Li, Auteur ; Kai Yang, Auteur Année de publication : 2024 Article en page(s) : p. 336-344 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Copolymère phénolique époxy Ethylènediamine Fibres textiles -- Propriétés mécaniques Fibres textiles synthétiques Filature à sec Matériaux -- Modifications chimiques Mesure Index. décimale : 668.4 Plastiques, vinyles Résumé : F-44 phenolic epoxy fibers were produced through high-temperature dry spinning utilizing F-44 phenolic epoxy resin as the base material, combined with n-butanol and ethylenediamine (EDA) as the curing agent. The fibers were subsequently analyzed for their structural, thermal stability, microstructural, and mechanical properties using techniques such as Fourier transform infrared spectroscopy, micro-infrared imaging, thermogravimetric analysis, nuclear magnetic resonance, scanning electron microscopy, and fiber strength testing. The limitations of phenolic resins, including high brittleness, poor toughness, and low elongation at break, restrict their potential applications, necessitating modifications to broaden their utility. Research findings indicate that modifying EDA induces a ring-opening reaction of epoxy groups, thereby enhancing the resin’s structure and improving the thermal stability and mechanical properties of fibers. The thermal stability and mechanical strength of the fibers were optimized at an EDA concentration of 2.0 wt% and curing time of 30 min, resulting in a tensile strength of 105 MPa and an elongation at break of 27.6 %. Note de contenu : - EXPERIMENTAL : Raw materials - Preparation of as-spun fibers - Preparation of cured fibers - MEASUREMENTS AND CHARACTERIZATION - RESULTS AND DISCUSSION : FTIR - Microscopic infrared analysis - 13C nuclear magnetic resonance Spectra (NMR) - Thermogravimetric analysis (TGA) - Scanning electron microscopy (SEM) - Mechanical property analysis DOI : https://doi.org/10.1515/ipp-2023-4465 En ligne : https://drive.google.com/file/d/1Z6b5ZezJS2Q2NNhS9HFGRMYB3kOIStLT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40875 [article]

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Synthesis of a di-(p-sulphophenoxy)-s-triazine reactive dye and its application in wool fabric ink-jet printing / Kai Yang in COLORATION TECHNOLOGY, Vol. 135, N° 3 (06/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 3 (06/2019) . - p. 202-212 Titre : Synthesis of a di-(p-sulphophenoxy)-s-triazine reactive dye and its application in wool fabric ink-jet printing Type de document : texte imprimé Auteurs : Kai Yang, Auteur ; Matthew Clark, Auteur ; David M. Lewis, Auteur Année de publication : 2019 Article en page(s) : p. 202-212 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique Colorants -- Analyse Colorants -- Stabilité Colorants -- Synthèse Colorants réactifs Fixation (chimie) Impression jet d'encre Impression sur étoffes Laine Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Reactive dyes based on di-(p-sulphophenoxy)-s-triazines were synthesised, characterised and applied to wool fabric by ink-jet printing. The extent of dye-fibre covalent bonding (% fixation) was measured on prints produced using different development methods. The most promising method to obtain high dye-fibre fixation values was to interleave the printed wool with a pre-wetted cotton fabric and store for 3 h. Steam fixation was also investigated but gave lower fixation values. The degree of dye hydrolysis vs time in the ink formulation was evaluated because ink stability is critical in commercial operation ; a reformulated ink based on a phosphate buffer was found to improve ink stability. Note de contenu : - EXPERIMENTAL : Materials - Chemicals - Ink-jet printing procedure - Wool pre-treatment - Ink-jet printing - Analytical methods - Synthesis of p-phenol-sulphonate-s-triazine reactive dyes - The stability of the dye 4-based ink vs pH conditions - Fixation values from prints produced with dye 4 when inkjet printed oon wool using different application parameters (batching and steaming methods) - Percentage fixation (F) on the printed dye - RESULTS AND DISCUSSION : CE, FT-IR and NMR analysis of the DCT dye - CE, FT-IR and NMR analysis of dye 4 - Ink stability of dye 4-based ink at different pH conditions - Effects of fixation parameters on dye fixation - Stability of dye 4 in buffer solution DOI : 10.1111/cote.12388 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12388 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32612 [article]

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Synthesis of Fe3O4 nanoparticles with tunable sizes for the removal of Cr(VI) from aqueous solution / Yibing Feng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 5 (09/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 5 (09/2018) . - p. 1145-1155 Titre : Synthesis of Fe3O4 nanoparticles with tunable sizes for the removal of Cr(VI) from aqueous solution Type de document : texte imprimé Auteurs : Yibing Feng, Auteur ; Yi Du, Auteur ; Zhongtao Chen ; Minxing Du ; Kai Yang ; Xingjie Lv ; Zhongfu Li Année de publication : 2018 Article en page(s) : p. 1145-1155 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbants et adsorbants Adsorption Caractérisation Chrome hexavalent Déchets industriels -- Elimination Nanoparticules Nanoparticules -- Synthèse Oxyde de fer Solutions aqueuses (chimie) Triéthanolamine Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, size-tunable magnetite (Fe3O4) nanocrystal spheres were promptly synthesized by a facile one-pot solvothermal process with the presence of triethanolamine as an additive. The as-synthesized Fe3O4 nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy, and vibrating sample magnetometer. The results showed that the synthesized nanoparticles were in the size range of 30–350 nm, had well-defined Fe3O4 crystal phase, and had favorable saturation magnetization. The effects of various important parameters, such as initial Cr(VI) concentration, temperature, and pH, on the adsorption properties of the as-obtained Fe3O4 particles for the removal of Cr(VI) in aqueous solution were deeply analyzed and studied. The results confirmed that the adsorption efficiency was highly pH dependent, decreased with the increasing of initial concentration of Cr(VI), and increased with increasing temperature. The adsorption data were well fitted with the Langmuir isotherm. The maximum adsorption capacity calculated from the Langmuir isotherm was 56.625 mg g−1 at temperature of 35°C and pH of 2.0. Note de contenu : - EXPERIMENTAL SECTION : Chemicals - Synthesis and characterization of the adsorbent - Adsorption experiments - RESULTS AND DISCUSSION : Adsorbent characterization - Effect of temperature and contact time - Effect of pH on removal of Cr(VI) ions from aqueous solution and the distribution of Cr(VI) and Cr(III) species in residue solutions - Effect of initial concentration of Cr(VI) and the adsorption isotherms - Adsorption mechanism DOI : 10.1007/s11998-018-0052-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0052-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31141 [article]

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