Facile fabrication of robust superhydrophobic cotton fabrics modified by polysiloxane nanowires for oil/water separation / Bin Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 3 (05/2018) . - p. 611-621 Titre : Facile fabrication of robust superhydrophobic cotton fabrics modified by polysiloxane nanowires for oil/water separation Type de document : texte imprimé Auteurs : Bin Wang, Auteur ; Binghang Lei, Auteur ; Yuhao Tang, Auteur ; Dong Xiang, Auteur ; Hui Li, Auteur ; Qi Ma, Auteur ; Chunxia Zhao, Auteur ; Yuntao Li, Auteur Année de publication : 2018 Article en page(s) : p. 611-621 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Hydrophobie Oléophobie Séparateurs d'eau et d'hydrocarbures Séparation (technologie) Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Systèmes auto-assemblés Textiles et tissus à usages techniques Index. décimale : 667.9 Revêtements et enduits Résumé : The removal of oil and organic pollutants from water is highly desired due to increasing industrial oil-contaminated wastewater, as well as frequent oil spill accidents. In this paper, superhydrophobic and superoleophilic fabrics were facilely fabricated for oil/water separation application via in situ growth of polysiloxane nanowires on cotton fabrics. The polysiloxane nanowires were immobilized on the cotton fabrics through a self-assembly process of alkylsilane on the microfibers of fabrics. The combination of the hierarchical structure and the low-surface-energy polysiloxane nanowires greatly contributed to the superhydrophobicity of the fabrics. Furthermore, the superhydrophobicity remained even after they were exposed to different chemicals for 72 h and strong ultraviolet irradiation and repeated abrasion, indicating excellent stability. More importantly, the as-prepared cotton fabrics were successfully used for separating various oil/water mixtures by a solely gravity-driven process with high separation efficiency and desirable durability. The cotton fabrics are commercially available, low-cost, and environmentally friendly materials, and thus such superhydrophobic and superoleophilic cotton fabrics could be very attractive for oil/water separation and oil spill cleanup when high flexibility, strength, and chemical resistance are taken into account. Note de contenu : - EXPERIMENTAL : Materials - Activation of cotton fabrics - In-situ growth of polysiloxane nanowires - Characterization of modified fabrics - Chemical and UV resistance of superhydrophobic - Water/oil separation - RESULTS AND DISCUSSION : Modification and characterization of cotton fabrics - Superhydrophobicity and stability of the modified fabrics - Water/oil separation DOI : 10.1007/s11998-017-0002-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0002-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30757 [article]

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Nano-SiO2-oxazolidine combination tannage-potential for chrome-free leather / Lu Yan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 6 (11-12/2008)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 6 (11-12/2008) . - p. 252-257 Titre : Nano-SiO2-oxazolidine combination tannage-potential for chrome-free leather Type de document : texte imprimé Auteurs : Lu Yan, Auteur ; Zhaoyang Luo, Auteur ; Haojun Fan, Auteur ; Yuansen Liu, Auteur ; Hui Li, Auteur ; Biyu Peng, Auteur ; Bi Shi, Auteur Année de publication : 2008 Article en page(s) : p. 252-257 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuirs et peaux -- Propriétés mécaniques Dioxyde de silicium Formulation (Génie chimique) Liqueurs de tannage Nanoparticules Oxazolidine Post-tannage Tannage chrome free Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A novel pickle-less combination tannage based on nano-SiO2 and oxazolidine as a substitute for chrome tanning has been developed. The size and distribution of nano-SiO2 in protein, the hydrothermal stability, the mechanical properties and the antifungal effect of final leather as well as the evaluation of eco-friendly characteristics of combination tannage were investigated. Scanning Electric Microscope (SEM) analysis indicates that the distribution of nano-SiO2 in protein is even when the SiO2 concentration is lower than 5wt% (on bated pelt weight), and the size of SiO2 particles can be controlled to a range from 60 to 150nm. But when the SiO2 concentration exceeds 7wt%, most of the particles conglomerate together and the size of the SiO2 particles is larger than 400nm. Differential Scanning Calorimeter (DSC) study shows that the shrinkage temperature of final leather which is related to the content of nano-SiO2 is more than 95°C. Compared to chrome tannage, leather tanned with oxazolidine-nano-SiO2 demonstrates a higher resistance to mould than conventional wet-blue. The latter incubated for 3 days began to grow mildew, whilst the oxazolidinenano-SiO2 tanned leather which was incubated for 6 days had no mildew, showing a fine antifungal effect. Environmental impact assessment shows that the developed process exhibits significant reduction in total solids (TS) and better biodegradability of organic compounds in the effluent when compared to chrome tanning. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Optimization of oxazolidine for pre-tanning - Oxazolidine-nano-SiO2 combination tanning - Conventional chrome tanning and post tanning process - Differential scanning calorimetry studies - Mechanical properties test of leather samples - Colour measurement - Scanning Electron Microscopic analysis - The antifungal effect of leather tanned with oxazolidine-nano-SiO2 - Analysis of spent tan liquor - RESULTS AND DISCUSSION : Optimization of oxazolidine offer - The hydrothermal stability of nano-SiO2 and oxazolidine combination tanned leather - Mechanical properties of leather tanned with oxazolidine-nano-SiO2 - Colour measurement results - The influence of nano-SiO2 content on the size and distribution of SiO2 in protein - The antifungal effect of the oxazolidine and nano-SiO2 combination tanned leather - Environmental benefits - Table 1 : Post tanning formulation for both combination tanned and chrome tanned leathers - Table 2 : Effect of oxazolidine content on Ts of leather and the penetration time of nano-precursor - Table 3 : Physical strngth of crust leathers tanned with chromium and oxazolidine-nano-SiO2 - Table 4 : Colour measurement of nano-SiO2 and oxazolidine combination tanned leather - Table 5 : Spent tan liquor analysis of oxazolidine and nano-SiO2 combination tanning - Table 6 : The relationship between BOD5/COD value and the biodegradability of an organic compound En ligne : https://drive.google.com/file/d/1-m9OGj7gCA2RNzFBn1QzBzvadXsIobnO/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38995 [article]

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Preparation and characterization of polyacrylate composite and its application in superhydrophobic coating based on silicone-modified ZnO / Changpo Ma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 415-433 Titre : Preparation and characterization of polyacrylate composite and its application in superhydrophobic coating based on silicone-modified ZnO Type de document : texte imprimé Auteurs : Changpo Ma, Auteur ; Yongzan Li, Auteur ; Jian Zhang, Auteur ; Feng Ning, Auteur ; Minxia Kang, Auteur ; Hui Li, Auteur ; Zumin Qiu, Auteur Année de publication : 2021 Article en page(s) : p. 415-433 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Emulsions Hydrophobie Nanoparticules Oxyde de zinc Polyacrylates Revêtements organiques Rugosité Silicones Les silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki). Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, a kind of silicone containing double bond and hydrogen bond has been synthesized via telomerization. In order to disperse and incorporate ZnO into the polymer matrix, ZnO was modified with silicone. Finally, ZnO/polyacrylate and silicone/polyacrylate composites were prepared using modified ZnO and silicone. The present study reports synthesis and characterization of ZnO/polyacrylate and silicone/polyacrylate nanocomposites by in situ emulsion polymerization. The effects of ZnO and silicone on the morphological structure and thermal properties of composites were systematically studied. The composites were characterized using FTIR, XRD, SEM, TEM, TGA, particle size analysis, UV, and WCA. It could be seen that the thermal degradation temperature of the composites increased significantly with the addition of ZnO and silicone. SEM analysis showed that the films were evenly distributed with the surface-modified ZnO nanoparticles. Then, the modified ZnO/polyacrylate superhydrophobic composite coating was prepared using modified ZnO and silicone/polyacrylate emulsion. The coating has excellent self-cleaning and oil–water separation properties. Note de contenu : - EXPERIMENTAL : Materials - Preparation of a silicone containing double bond and hydrosilane bond - Preparation of silicone-modified ZnO nanoparticles - Preparation of ZnO/polyacrylate nanocomposite emulsion - Preparation of silicone/polyacrylate nanocomposite emulsion - Preparation of modified ZnO/polyacrylate superhydrophobic composite coating - Characterization - RESULTS AND DISCUSSION : FTIR analysis - XRD analysis - SEM analysis - TEM analysis - TG analysis - Particle size distribution - UV resistance - Water contact angle and water absorption - APPLICATION OF MODIFIED ZNO/POLYACRYLATE SUPERHYDROPHOBIC COMPOSITE COATING : The microstructure of the coating - Stability of superhydrophobic coating - Application of superhydrophobic coating - Scheme 1 : Preparation of a silicone containing double bond and hydrosilane bond - Scheme 2 : Preparation of silicone-modified ZnO nanoparticles - Scheme 3 : Preparation of ZnO/polyacrylate nanocomposite emulsion - Scheme 4 : Preparation process of superhydrophobic coating - Table 1 : General recipe for preparation of ZnO/polyacrylate nanocomposite emulsion - Table 2 : General recipe for preparation of silicone/polyacrylate nanocomposite emulsion - Table 3 : Thermogravimetric parameters of polyacrylate - Table 4 : The GPC of polyacrylate - Table 5 : Roughness parameters of samples DOI : https://doi.org/10.1007/s11998-020-00411-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00411-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35604 [article]

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Simulation, synthesis, characterisation and dyeing properties of a fluorescent hemicyanine dye / Songsong Tang in COLORATION TECHNOLOGY, Vol. 136, N° 1 (02/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 1 (02/2020) . - p. 23-33 Titre : Simulation, synthesis, characterisation and dyeing properties of a fluorescent hemicyanine dye Type de document : texte imprimé Auteurs : Songsong Tang, Auteur ; Chuanxiang Qin, Auteur ; Hui Li, Auteur ; Guoqiang Chen, Auteur Année de publication : 2020 Article en page(s) : p. 23-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse toxicologique Caractérisation Colorants -- Propriétés tinctoriales Colorants -- Synthèse Fluorescence Hemicyanine Photostabilité Polyacryliques Simulation par ordinateur Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, a hemicyanine dye, trans-4-(4-(diethylamino)styryl)-1-ethylpyridinium bromide (DYE-BD), was synthesised and simulated. The maximum absorption wavelength of DYE-BD was calculated with the same basis set by using the Gaussian 09 software based on different methods, while time-dependent density functional theory was applied to simulate the maximum emission wavelength of the designed dye. The changes in enthalpy and Gibbs free energy were simulated at the b3lyp/6-31G(d) level, and energy changes in the luminescence process were assessed using mathematical methods. Furthermore, DYE-BD was used to colour acrylic fabric following the typical dyeing procedure for cationic dyes. The photostability of the synthesised dye was analysed using quantum theory and mathematical methods. The synthesised dye, analysed using the Ecological Structure Activity Relationships class program, had no toxicity to aquatic life, while the acrylic fabrics dyed with DYE-BD met the fluorescent orange requirements for background and combined performance materials according to the EN ISO 20471:2013 standard. Note de contenu : - EXPERIMENTAL : Calculation method - Materials - Experiments - Dyeing process - RESULTS AND DISCUSSION : Enthalpy and Gibbs free energy - Fluorescent properties - Biotoxicity analysis of synthetic processes - Change of energy in the luminescence process - Analysis of the photostability - High visibility properties DOI : https://doi.org/10.1111/cote.12432 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12432 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33697 [article]

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