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Collagen fiber membrane-derived chemically and mechanically durable superhydrophobic membrane for high-performance emulsion separation / Huifang Li in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)
[article]
Titre : Collagen fiber membrane-derived chemically and mechanically durable superhydrophobic membrane for high-performance emulsion separation Type de document : texte imprimé Auteurs : Huifang Li, Auteur ; Wan Zheng, Auteur ; Hanzhong Xiao, Auteur ; Baicun Hao, Auteur ; Yujia Wang, Auteur ; Xin Huang, Auteur ; Bi Shi, Auteur Année de publication : 2021 Article en page(s) : 10 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Composés organométalliques
Emulsions
Fibrilles de collagèneLa fibrille de collagène est une structure constituée d'un assemblage de fibres de tropocollagène (assemblage de 3 protéines de collagène alpha (alpha 1 - alpha 1 - alpha 2) en une hélice droite.
Hydrophobie
Membranes (technologie)
Nanoparticules -- Synthèse
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Séparation (technologie)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Developing high-performance separation membrane with good durability is a highly desired while challenging issue. Herein, we reported the successful fabrication of chemically and mechanically durable superhydrophobic membrane that was prepared by embedding UiO-66 as size-sieving sites within the supramolecular fiber structure of collagen fiber membrane (CFM), followed by the polydimethylsiloxane (PDMS) coating. The as-prepared CFM/UiO-66(12)/PDMS membrane featured capillary effect-enhanced separation flux and homogeneous porous channels guaranteed high separation efficiency. When utilized as double-layer separation membranes, this new type of composite membranes separated various surfactant stabilized water-in-oil microemulsions and nanoemulsions, with the separation efficiency high up to 99.993 % and the flux as high as 973.3 L m− 2 h− 1. Compared with commercial polytetrafluoro ethylene (PTFE) membrane, the advantage of the double-layer CFM/UiO-66(12)/PDMS membranes in separation flux was evident, which exhibited one order of magnitude higher than that of commercial PTFE membrane. The CFM/UiO-66(12)/PDMS membrane was acid-alkali tolerant, UV-aging resistant and reusable for emulsion separation. Notably, the CFM/UiO-66(12)/PDMS membrane was mechanically durable against strong mechanical abrasion, which was still capable of separating diverse water-in-oil emulsions after the abrasion with sandpaper and assembled as double-layer separation membranes. We anticipate that the combination of CFM and metal organic frameworks (MOFs) is an effective strategy for fabricating high-performance separation membrane with high mechanical and chemical durability. Note de contenu : - Materials
- Synthesis of UiO-66 nanoparticles
- Fabrication of the CFM/UiO-66(x)/PDMS membrane
- Fabrication of the CFM/PDMS membrane
- Preparation of water-in-oil emulsion
- Emulsion separation of the CFM/UiO-66(x)/PDMS membrane
- Chemical and mechanical durability
- CharacterizationDOI : https://doi.org/10.1186/s42825-021-00060-5 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00060-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37544
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 10 p.[article]A comparative study of reactive and conventional surfactants in water borne coatings / Geeta Sharma in PAINTINDIA, Vol. LXVI, N° 1 (01/2016)
[article]
Titre : A comparative study of reactive and conventional surfactants in water borne coatings Type de document : texte imprimé Auteurs : Geeta Sharma, Auteur ; Sunakshi Jamnare, Auteur ; Rimita Bhar, Auteur ; Kumar Ghosh Swapan, Auteur Année de publication : 2016 Article en page(s) : p. 54-60 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Angle de contact
Brillance (optique)
Energie de surface
Essais dynamiques
Formulation (Génie chimique)
Hydrophobie
Latex
Résistance à l'humidité:Résistance à l'eau
Revêtements:Peinture
Surfactants
Surfactants réactifsIndex. décimale : 667.9 Revêtements et enduits Résumé : A comparison of the role of conventional and reactive surfactants also known as surfmers in waterborne latexes and paints was investigated in this study. The systems studied were acrylate latexes prepared by semi¬continuous polymerization in different combinations of surfactants. The effect of surfactant nature on microstructure of latex and film properties were examined. The impact of surfactant migration and its absence was examined by water resistance, hydrophobicity and minimum film forming temperature in the prepared latex films. The nature and integrity of paint film formulated out of these latexes was also discussed. The impact on important properties like dirt pick up resistance, scrub resistance and gloss was illustrated. It has been concluded that reactive surfactants provide the scope of improving water resistance. Note de contenu : - EXPERIMENTAL : Materials and methods - Latex synthesis - Characterization of latex and polymer - Preparation of paints and testing - Results and discussion - Film appearance - Impact on microstructure of the latex
- MINIMUM FILM FORMING TEMPERATURE OF LATEXES
- WATER RESISTANCE OF LATEXES
- WATER CONTACT ANGLE AND SURFACE TENSION : Paint properties - Dirk pick up resistance of paints - Scrub test - Gloss of paint films - Surfactant leachingEn ligne : https://drive.google.com/file/d/1iZIWViqJLYlPCdhkEYcxAtYd6Xkd1okd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25675
in PAINTINDIA > Vol. LXVI, N° 1 (01/2016) . - p. 54-60[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17900 - Périodique Bibliothèque principale Documentaires Disponible Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles / Yuta Higashino in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
[article]
Titre : Comparative study of the dynamic hydrophobicity of fluoroalkylsilane coatings tilted at acute and obtuse angles Type de document : texte imprimé Auteurs : Yuta Higashino, Auteur ; Hirokazu Takahashi, Auteur ; Munetoshi Sakai ; Toshihiro Isobe ; Sachiko Matsushita, Auteur ; Akira Nakajima, Auteur Année de publication : 2018 Article en page(s) : p. 891-898 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de glissement
Fluoroalkylsilane
Gouttelettes
Hydrophobie
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The relation between surface homogeneity and internal fluidity for a droplet sliding on a surface tilted at acute and obtuse angles was investigated using two hydrophobic fluoroalkylsilane (FAS) coatings with different roughness. The coatings (FAS-smooth and FAS-rough) were prepared on an Si substrate using chemical vapor deposition or soaking methods and were tilted at 35° or 145°. Sliding velocity of water droplets on the surface tilted at 145° was greater than that tilted at 35° for both coatings. For 35° tilting, the dominant mode of the sliding velocity was slipping for FAS-smooth, whereas rolling governed the entire sliding velocity for FAS-rough. The slipping mode was more important than the rolling one for both coatings when they were tilted at 145°. The change of slipping velocity was more remarkable than that of rolling one for both coatings between 35° and 145° tilting. Results show that the difference in gravity direction and contact area of the droplets contributed to this tilt angle dependence of the sliding velocity. When a droplet slid down with acceleration on FAS-smooth surface, the coefficient of the viscous drag force correlated with the velocity ratio (Utotal/Uslip). DOI : 10.1007/s11998-018-0064-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0064-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30866
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 4 (07/2018) . - p. 891-898[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20078 - Périodique Bibliothèque principale Documentaires Disponible A comparative study of various collagen fibre waste as oil sorbent materials / Weining Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 99, N° 6 (11-12/2015)
[article]
Titre : A comparative study of various collagen fibre waste as oil sorbent materials Type de document : texte imprimé Auteurs : Weining Du, Auteur ; Han Xiaona, Auteur ; Li Zhengjun, Auteur ; Sun Guolong, Auteur ; Li Lixin, Auteur Année de publication : 2015 Article en page(s) : p. 267-272 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants
Collagène
Cuirs et peaux -- Déchets -- Recyclage
Epoxydes
Huile de colza
Huiles et graisses
Hydrophobie
Nettoyage
Oligomères
PolydiméthylsiloxaneLe polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones.
Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone.
Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK).
La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones.
Poudre de peaux
SiliconesLes 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).Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : To compare the potentiel utilization of various collagen fibre wastes from the leather industry, such as raw hide waste, oil-tanned and chrome-tanned wastes, as oil sorbents, a hydrophobic polydimethylsiloxane (PDMS) modified collagen fibre was prepared using raw hide waste and an epoxy-terminated silicone oligomer. We fabricated samples 13y a lyophilization technique utilizing the corresponding hide powder fibre (HPF). The oil sorption capacity, sorption saturation time, and retention capacity of prepared sorbents were studied. The results showed that oil sorption capacity of PDMS-modified HPF for silicone oil and vegetable (rape) oil were 6.98 and 5.58g/g, respectively. This sample exhibited the highest oil sorption capacity. The resuits suggest that with appropriate pore size, high porosity and low apparent surface energy, collagen fibre based sorbent would demonstrate favourable oil sorption characteristics and is very promising for ail cleanup application. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Preparation of hide powder fibres (HPFs) and PDMS-modified HPF - Preparation of pie-shaped HPF sorbents - Oil sorption capacity - Oil sorption saturation time - Oil retention capacity - Characterizations
- RESULTS AND DISCUSSION : Oil sorption capacity in pure oil medium - Oil sorption saturation time - Oil retention capacityEn ligne : https://drive.google.com/file/d/1gdQCSjGxM_TPnqo-uzetB6n3UyHHkflr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25097
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 99, N° 6 (11-12/2015) . - p. 267-272[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17683 - Périodique Bibliothèque principale Documentaires Disponible Conservation concerns for acrylic emulsion paint coatings / M. Veeramani in PAINTINDIA, Vol. LXXII, N° 4 (04/2022)
[article]
Titre : Conservation concerns for acrylic emulsion paint coatings Type de document : texte imprimé Auteurs : M. Veeramani, Auteur Année de publication : 2022 Article en page(s) : p. 88-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dispersions et suspensions
Hydrophobie
Latex
Liants
Liants en phase aqueuse
Polyacryliques
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Acrylic emulsion artists' paints were received with much fanfare and excitement in the 1950s and 1960s. They embodied the characteristics that many artists had been searching for at that time, affording a means of expression that was distinct from oi I painting and its associated history and traditions. As described it, 'there was an urge to loosen painting. [These colours] released new kinds of tactile qualities'. These synthetic paints produced films of great clarity and phenomenal elasticity, were easy to manipulate, could be painted directly onto supports, dried quickly, were thinned with water and exhibited high resistance to ultraviolet degradation. It was changed to acrylics for a number of reasons. They dry faster, which they do, and that they retain their original colour, which they do.The durability and light and the fact that one can use water instead of turpentine : all that makes it easier given the abstract image. As painting needed less and less drying time, depth, and so forth, the materials came along that made that more obvious. In spite of their outstanding mechanical and aging properties, acrylic emulsion paintings do suffer damage, often through external influences. Within the conservation profession, concerns were soon raised as some of these newly painted works began to require cleaning and repair. Note de contenu : - The development of water-borne acrylic artists paints
- Additives : Additives in the emulsion binder - Additives utilised by paint formulators to achieve the intended performance propertiesEn ligne : https://drive.google.com/file/d/10e316ikP9GPmDBwR93LlTimMo4BhiupC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37748
in PAINTINDIA > Vol. LXXII, N° 4 (04/2022) . - p. 88-90[article]Réservation
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PermalinkDeveloping and evaluating early rain resistance in exterior architectural coatings / Shelby Kellogg in COATINGS TECH, Vol. 15, N° 8 (08/2018)
PermalinkDevelopment in rheological additives in surface coatings / Deepak Patil in PAINTINDIA, Vol. LXIV, N° 2 (02/2014)
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