Constructing robust and magnetic PU sponges modified with Fe3O4/GO nanohybrids for efficient oil/water separation / Dongdong Ge in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 661-670 Titre : Constructing robust and magnetic PU sponges modified with Fe3O4/GO nanohybrids for efficient oil/water separation Type de document : texte imprimé Auteurs : Dongdong Ge, Auteur ; Yun Zhang, Auteur ; Zhenshan Cui, Auteur ; Guilong Wang, Auteur ; Jun Liu, Auteur ; Xiaomeng Lv, Auteur Année de publication : 2023 Article en page(s) : p. 661-670 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbants et adsorbants Caractérisation Eponges Hydrophobie Matériaux magnétiques Nanoparticules Oxyde de fer Oxyde de graphène Polyuréthanes Rugosité Index. décimale : 667.9 Revêtements et enduits Résumé : Metal oxides, due to their low cost, environmental friendliness and wide sources, have attracted great attention. We chose iron oxide/graphene oxide (Fe3O4/GO) nanohybrids to modify a PU sponge to increase the surface roughness of the sponge without damaging its inherent structural properties. The composite was then treated with octadecane thiol to reduce the surface energy and produce a superhydrophobic and oleophilic absorption material with a water contact angle of 157°. From the absorption experiment with simulated oily water (including diesel oil, lubricating oil, rapeseed oil, chloroform, N,N-dimethyl formamide, tetrahydrofuran, ethanol and acetone), it was found that the Fe3O4/GO-modified PU sponge could absorb up to 80–170 times its own weight while showing outstanding recyclability achieved by squeeze/absorption cycles. Moreover, the composite absorption material exhibited weak magnetic properties, suggesting its recycling practicability. These results provide a quick and simple strategy to deal with oil spills and chemical leakage. Note de contenu : - EXPERIMENTAL SECTION : Preparation of Fe3O4/GO nanohybrids - Synthesis of the M-PU sponge - RESULTS AND DISCUSSION : Processing of the PU sponge - Characterization of the Fe3O4/GO nanohybrids - Morphology and wettability of the M-PU sponge - Application of the M-PU sponge as an absorbent - Table 1 : The magnetism values of the Fe3O4/GO nanohybrids (a); M-PU sponge (b) DOI : https://doi.org/10.1007/s11998-022-00699-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00699-7.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39310 [article]

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Variable structural colors and hydrophobicity of SiO2/polyethyleneimine coating on glass substrate / Yongtang Jia in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 6 (11/2015) . - p. 1031-1039 Titre : Variable structural colors and hydrophobicity of SiO2/polyethyleneimine coating on glass substrate Type de document : texte imprimé Auteurs : Yongtang Jia, Auteur ; Yun Zhang, Auteur ; Guangqing Zhuang, Auteur ; Qinguo Fan, Auteur ; Jianzhong Shao, Auteur ; Guojin Liu, Auteur Année de publication : 2015 Article en page(s) : p. 1031-1039 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact Couleur Dioxyde de silicium Hydrophobie Polyéthylèneimine Verre -- Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : Films composed of nanoparticles have been commonly used in decorative applications due to their striking colors and useful self-cleaning properties. An efficient option for the structural coloration has been developed through fabrication of the thin films on substrates from SiO2 nanoparticles and PEI. The surface morphology and microstructure of SiO2/polyethyleneimine (PEI) film on glass substrate were analyzed with an SEM, AFM, and thickness analyzer. The homogeneous coatings of limited SiO2 aggregation with air voids were formed on glass substrates. It was strongly suggested that optical properties of the films came from the single-layer thin film interference effect. The structural colors of SiO2/PEI films were captured by digital camera, integrating sphere spectrophotometer and multi-angle spectrophotometer. The results indicated that the films illuminated distinctly as the thickness increased, and presented different lightness values and hues at various viewing angles. Moreover, those films with some surface roughness exhibited high water static contact angle, which endowed the films potential hydrophilicity and self-cleaning property. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Preparation of the solutions - Preparation of the composite SiO2/PEI thin films - Characterization - RESULS AND DISCUSSION : Variable colors through a single-layer interference effect - Structural colors of the SiO2/PEI films with various thickness - Color variation at different angles - Hydrophobic property of the SiO2/PEI coating DOI : 10.1007/s11998-015-9708-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9708-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24952 [article]

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