Effect of fabric texture on the durability of fluorine-free superhydrophobic coatings / Nusret Celik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 785-796 Titre : Effect of fabric texture on the durability of fluorine-free superhydrophobic coatings Type de document : texte imprimé Auteurs : Nusret Celik, Auteur ; Sümeyye Altindal, Auteur ; Zehra Gozutok, Auteur ; Mahmut Ruzi, Auteur ; M. Serdar Onses, Auteur Année de publication : 2020 Article en page(s) : p. 785-796 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Auto-nettoyage Caractérisation Dioxyde de silicium Durée de vie (Ingénierie) Enrobage (technologie) Essais accélérés (technologie) Hydrophobie Imperméabilisation Nanoparticules Revêtements -- Propriétés mécaniques Textiles et tissus Index. décimale : 667.9 Revêtements et enduits Résumé : Water repellency is a desired feature of fabrics for certain applications in textile industry such as water-repellent garments, tents, and umbrellas. Coating of fabrics with fluorocarbons or silicones followed by heat treatment is the general process to impart hydrophobicity even though the resulted water repellency is limited. In this study, we prepare a fluorine-free superhydrophobic coating from hydrophobic SiO2 nanoparticles that can be easily applied to common fabrics by simply spray coating, leading to superhydrophobic fabrics with a water contact angle of 172° and a sliding angle of 3°. The process to achieve extreme water repellency is simple and only involves a single step, and there is no need for further processes like annealing or heat treatment. The superhydrophobic coated fabrics display durability dependence on the texture of the underlying material, where coated chenille and nonwoven fabrics show robust mechanical durability against water impact, abrasion, and laundering. The ready availability of the coating materials, the simple process of application, and the robust mechanical durability of superhydrophobic fabrics show great potential for real-world applications. Note de contenu : - MATERIALS AND METHODS : Preparation and deposition of the superhydrophobic coating - Characterization - Durability tests of the coated superhydrophobic fabrics - RESULTS AND DISCUSSIONS : Characterization - Mechanical durability - Potential applications DOI : https://doi.org/10.1007/s11998-020-00333-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00333-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34108 [article]

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Evaluation of self-cleaning properties of leather surface with TiO2 nanoparticles / Véronica Bouça in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 2 (03-04/2020)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 104, N° 2 (03-04/2020) . - p. 83-89 Titre : Evaluation of self-cleaning properties of leather surface with TiO2 nanoparticles Type de document : texte imprimé Auteurs : Véronica Bouça, Auteur ; Diana Sousa, Auteur ; Mariana Ornelas Cardoso, Auteur ; David Conceçào, Auteur ; Gabriela Queiros, Auteur ; Eduardo F. Marques, Auteur ; Joaquim Gaiào, Auteur ; Raquel Mourào, Auteur ; Ana Catarina Lopes, Auteur ; Filipe Crispim, Auteur ; Leal Neto, Auteur ; Lorena Coelho, Auteur Année de publication : 2020 Article en page(s) : p. 83-89 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact Auto-nettoyage Caractérisation Dioxyde de silicium Dioxyde de titane Nanoparticules Nubuck Le nubuck1 est une croute de daim ou de cuir. Sa particularité vient du fait qu'il a subi un traitement particulier. En effet, sa surface a été meulée ou grattée au papier de verre très fin. C'est pourquoi il revêt cette apparence veloutée et sa douceur au toucher. Le ponçage de la fleur lui donne un aspect qui diffère largement du suède. Comme seule la surface externe du cuir est touchée par le traitement, il possède une meilleure résistance et conserve toute la finesse de son grain. Il est utilisé particulièrement dans l'industrie de l'ameublement pour la fabrication des fauteuils et canapés ainsi que par l'industrie de la chaussure. Il est souvent assez coûteux, car c'est une matière qui a une certaine noblesse. Son nom provient probablement de la langue anglaise, et de new buck qui signifie nouveau daim. Photocatalyse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Titanium dioxide (Ti02) is well known for its photocatalytic capabilities, and its applications coverl different areas, such as wastewater treatment, sunscreen and ultraviolet (UV) blocking, among others. Its application as a photocatalytic additive for self-cleaning properties has been reported with different substrates, resulting in stain degradation. As such, the goal of this work was to functionalise two types of nubuck leather, conferring on them self-cleaning properties. For this purpose, two photocatalytic materials were tested: a commercial TiO2 (Degussa P25 Ti02) and Si02@Ti02 nanoparticles, which were applied onto leather surfaces by a spray coating technique. The hydrophilic behaviour of these two types of nubuck leather was determined by contact angle (CA) measurement, using the sessile drop technique. The finished samples of nubuck leather were characterized by measuring their diffuse reflectance. The self-cleaning properties of finished nubuck leather samples were evaluated through their ability to photodegrade an organic stain, rhodamine-B dye. The P25 TiO2 and Si02@TiO2 particles did not provide self-cleaning properties for the two types of nubuck leather, indicating the need for more in-depth research on the use of these particles for self-cleaning purposes. Note de contenu : - MATERIALS AND METHODS - RESULTS AND DISCUSSION : Characterisation of leather surface - Self-cleaning analysis of leather surface - Table 1 : Brown leather surface samples (control, P25 TiO2 coating and SiO2@TiO2) with RhB stain before and after 20 hours of UV radiation exposure - Table 2 : White leather surface samples (control, P25 TiO2 coating and SiO2]TiO2) with RhB stain before and after 20 hours of UV radiation exposure En ligne : https://drive.google.com/file/d/1xzAfOK9UoDx6onxN7EQAUeQhuUhU1-Gl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33913 [article]

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Fabrication of durable polytetrafluoroethylene superhydrophobic materials with recyclable and self-cleaning properties on various substrates / Jinmei He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 755–763 Titre : Fabrication of durable polytetrafluoroethylene superhydrophobic materials with recyclable and self-cleaning properties on various substrates Type de document : texte imprimé Auteurs : Jinmei He, Auteur ; Yu Zhao, Auteur ; Mingjuan Yuan, Auteur ; Lingang Hou, Auteur ; Ansar Abbas, Auteur ; Menghui Xue, Auteur ; Xuerui Ma, Auteur ; Jiao He, Auteur ; Mengnan Qu, Auteur Année de publication : 2020 Article en page(s) : p. 755–763 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Auto-nettoyage Caractérisation Durée de vie (Ingénierie) Polytétrafluoréthylène Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Most of the artificial superhydrophobic surfaces easily lose their good water repellency once they are chemically or mechanically damaged, which seriously hinders their practical application. Durable superhydrophobic materials with recyclability, low-temperature resistance, and self-cleaning properties were successfully prepared by employing silica particles and polytetrafluoroethylene via a simple drop-coating method. The as-prepared superhydrophobic materials not only show excellent superhydrophobicity but also display fascinating durability and chemical stability after a series of rigorous tests. Importantly, the debris scraped from the superhydrophobic materials can be recycled and easily reused to prepare new superhydrophobic materials. This facile strategy may pave the way for the scalable and recyclable robust superhydrophobic materials in practical applications. Note de contenu : - Materials - Fabrication of the durable superhydrophobic materials - Characterization DOI : https://doi.org/10.1007/s11998-020-00322-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00322-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34105 [article]

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Facile fabrication of durable superamphiphobic PET fabrics / Xuan Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 711–718 Titre : Facile fabrication of durable superamphiphobic PET fabrics Type de document : texte imprimé Auteurs : Xuan Zhou, Auteur ; Si Sun, Auteur ; Chuan Zhang, Auteur ; Xiao-Yu Wang, Auteur ; Yan-Li Li, Auteur ; Yong Jiang, Auteur Année de publication : 2020 Article en page(s) : p. 711–718 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amphiphobie Auto-nettoyage Caractérisation Durée de vie (Ingénierie) Fibres textiles -- Propriétés chimiques Fibres textiles -- Propriétés mécaniques Hydrolyse Polyéthylène téréphtalate Revêtements organiques Textiles et tissus synthétiques Index. décimale : 667.9 Revêtements et enduits Résumé : Superamphiphobic coatings/materials are important for a wide variety of applications, but the majority of these coatings/materials still suffer from poor durability. Therefore, multifunctional superamphiphobic coatings/materials with strong mechanical and chemical stability are highly desired. Herein, a simple and flexible approach to produce multifunctional superamphiphobic poly(ethylene terephthalate) (PET) textiles was reported. First, dual micro/nanostructures on the PET fabric surface are constructed by hydrolysis of trimethoxymethylsilane, N-octyltriethoxysilane, and trimethylchlorosilane, and further modified by 1H,1H,2H,2H-perfluorodecyltriethoxysilane and poly(vinylidene fluoride). The as-obtained superamphiphobic PET fabrics show high liquid repellency to water, oil, organic liquids, and strong acid or alkali solutions, exhibiting a water contact angle (WCA) of 161° and an oil contact angle (OCA) of 156°. Meanwhile, the superamphiphobic PET fabrics show strong abrasion resistance; even after 180-cm consistent abrasion, the WCA still maintains 148° and the OCA maintains 140°. Importantly, the fabrics maintain their excellent superamphiphobic property after long-term UV irradiation or ultrasonic treatment, respectively. Because the prepared fabrics have multifunctional features and are easy to fabricate with low cost, they show great potential for self-cleaning, antifouling, anti-icing, drug reduction, corrosion resistance, and protective uniforms. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of superamphiphobic solution - Dip coating for superamphiphobic fabrics - Characterization - Measurement of chemical and mechanical stability of the coatings - RESULTS AND DISCUSSION : Characterization of the superamphiphobic PET fabrics - Surface wettability and self-cleaning performance of the modified fabrics - Durability of superamphiphobic coatings on fabric - UV-durable and chemical stable superamphiphobicity DOI : https://doi.org/10.1007/s11998-019-00289-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00289-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34101 [article]

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Forever chemicals / Karl Flowers in INTERNATIONAL LEATHER MAKER (ILM), N° 50 (11-12/2021)  

[article]  inINTERNATIONAL LEATHER MAKER (ILM) > N° 50 (11-12/2021) . - p. 34-36 Titre : Forever chemicals Type de document : texte imprimé Auteurs : Karl Flowers, Auteur ; Abigail Clare, Auteur Année de publication : 2021 Article en page(s) : p. 34-36 Langues : Anglais (eng) Catégories : Auto-nettoyage Bioaccumulation Cuir Cuirs et peaux -- Industrie -- Aspect de l'environnement Ecotoxicologie Environnement -- Etudes d'impact Nanotechnologie Produits chimiques -- Toxicologie Substances per- et polyfluoroalkylées Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Per- and polyfluorinated alkyl substances (PFAS), also known as "forever chemicals", are a group of more than 9,000 highly persistent synthetic chemicals. PFAS contain alkyl groups in which hydrogen atoms are replaced by fluorine. Industrial application and use of PFAS in consumer products commenced in the 1940s. These chemicals were used heavily until the early 2000s when researchers discovered they were environmentally damaging. PFAS do not easily degrade in the environment due to the highly stable carbon-fluorine bond, this strong bond is responsible for the persistent nature of PFAS that enables these chemicals to build up within the environnent and organisms. The carbon chains of the most common PFAS are fully fluorinated and are often attached to a functional group, such as a carboxylic or sulfonic acid. Common PFAS include perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS). The large diversity of PFAS substances results from the high variability in possible functional groups. Note de contenu : - PFAS in leather - Contamination and environmental impacts - Toxic impacts - Regulation - PFAS alternatives - Fig. 1 : The release of PFAS into the environment during a product's lifecycle - Fig. 2 : The spread and accumulation of PFAS in the environment - Fig. 3 : Nanotechnology providing a self-cleaning effect En ligne : https://drive.google.com/file/d/1c1br-cIoIwriimEGHeNpzWjvIBIjj_vG/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37071 [article]

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A multifunctional antifog, antifrost, and self-cleaning zwitterionic polymer coating based on poly(SBMA-co-AA) / Weirong Zou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

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Photoinduced hydrophilicity and self-cleaning characteristics of silicone-modified soya alkyd/TiO2 nanocomposite coating / Sushil S. Pawar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)  

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Superhydrophilic multifunctional antifogging coatings based on triethoxysilyl-terminated poly(N-vinylpyrrolidone) / Fangfei Meng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

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