Development challenges in waterproofing / Mei Yu in LEATHER INTERNATIONAL, Vol. 214, N° 4825 (10/2012)  

[article]  inLEATHER INTERNATIONAL > Vol. 214, N° 4825 (10/2012) . - p. 24-28 Titre : Development challenges in waterproofing Type de document : texte imprimé Auteurs : Mei Yu, Auteur ; Peter Danisch, Auteur Année de publication : 2012 Article en page(s) : p. 24-28 Langues : Anglais (eng) Catégories : Cuirs et peaux Imperméabilisation Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Water repellence is an important property of leather for several applications, such as footwear and clothing with high wearing comfort under wet and cold conditions. Waterproof shoe upper leather was first, applied in outdoor shoes and American army shoes and, thereafter, in golf shoes, safety shoes and winter boots etc. Nowadays there is a growing demand for shoes to be waterproof. We estimate that approximately 10%-15% or even 20% of the global shoe leather production is to some degree waterproofed, and this market segment is continuously increasing. The increasing customers' demand and market trend fo high quality waterproof leather, especially for leisure or sport shoes and boots, has led to development of high performance water repellent products. In the beginning, the development of water repellent products focused on achieving a high level of hydrophobicity and water vapour permeability. While most commercial water repellent products today meet the technical requirements of the market (Maeser and Bally-test, water vapour permeability) there is still a need for improving leather properties form the finishing point of view. Note de contenu : - Principles of waterproofing leather - Fats and oils as water repellent agents since the late 70s - Silicone oils as water repellent agents since the late 80s - Modern water repellent products and challenges En ligne : https://drive.google.com/file/d/1z82euKxjLuxfuC_RF34vxqxJ9DTk0NDX/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16149 [article]

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Fabrication of inhibitor anion-intercalated layered double hydroxide host films on aluminum alloy 2024 and their anticorrosion properties / You Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 2 (03/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 2 (03/2015) . - p. 293-302 Titre : Fabrication of inhibitor anion-intercalated layered double hydroxide host films on aluminum alloy 2024 and their anticorrosion properties Type de document : texte imprimé Auteurs : You Zhang, Auteur ; Jianhua Liu, Auteur ; Yingdong Li, Auteur ; SongMei Li, Auteur ; Mei Yu, Auteur ; Bing Xue, Auteur Année de publication : 2015 Article en page(s) : p. 293-302 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Anticorrosifs Anticorrosion Hydroxydes doubles lamellaires Tags : 'Layered  double  hydroxide'  Films  'Corrosion  inhibitors'  'Aluminium  alloy'  Anticorrosion Index. décimale : 667.9 Revêtements et enduits Résumé : ZnAl layered double hydroxide (LDH) host films have been synthesized on aluminum alloy 2024 substrate via a facile crystallization method, and then intercalated with different corrosion inhibitor anions (vanadate, molybdate, and 2-mercaptobenzothiazolate). The structures, compositions, and morphologies of the as-synthesized films before and after the anion-exchange reaction were characterized by means of glancing-angle X-ray diffraction, Fourier transform infrared, X-ray photoelectron spectroscopy, and scanning electron microscope techniques. The anticorrosion performance of films was evaluated by potentiodynamic polarization and salt spray test. The results show that all inhibitor anions are successfully intercalated in the layered galleries, providing enhanced corrosion protection for the substrate alloy. The anticorrosion abilities of films loaded with inhibitor anions are ordered as LDH–VO3 > LDH–MBT > LDH–MoO4 > LDH–NO3. Note de contenu : EXPERIMENTAL : Materials - Synthesis of ZnAl-LDH films - Characterization RESULTS AND DISCUSSION : Sructure and morphology of the LDH films - XPS analysis - Corrosion behavior of the LDH films DOI : 10.1007/s11998-014-9644-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9644-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23648 [article]

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A facile approach to superhydrophobic LiAl-layered double hydroxide film on Al-Li alloy substrate / You Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 3 (05/2015)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 3 (05/2015) . - p. 595-601 Titre : A facile approach to superhydrophobic LiAl-layered double hydroxide film on Al-Li alloy substrate Type de document : texte imprimé Auteurs : You Zhang, Auteur ; Jianhua Liu, Auteur ; Yingdong Li, Auteur ; Mei Yu, Auteur ; SongMei Li, Auteur ; Bing Xue, Auteur Année de publication : 2015 Article en page(s) : p. 595-601 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Caractérisation Couches minces Hydrophobie Hydroxydes doubles lamellaires Spectroscopie de photoélectrons Surfaces (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : A highly oriented LiAl-layered double hydroxide (LDH) film was first fabricated via a facile in situ growth method on Al–Li alloy. The morphology and structure of the LDH film were characterized using scanning electron microscopy, atomic force microscopy, X-ray diffraction, and transmission electron microscopy. After chemical modification with 1H,1H,2H,2H-Perfluorodecyltrimethoxysilane, the chemical compositions and states of surface-modified film were analyzed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results showed that the nest-like structure of LiAl-LDH film was composed of interconnected LiAl-LDH nanosheets, which oriented almost vertically to the substrate surface. After chemical modification, a superhydrophobic surface was obtained with water contact angle of 168°. The formation mechanism of the superhydrophobic film was also discussed. Note de contenu : - Materials - Synthesis of LiAl-LDH film - Preparation of superhydrophobic film - Characterization DOI : 10.1007/s11998-015-9660-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9660-9.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24183 [article]

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