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Absorption-desorption in tank linings / Gard Reian in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4582 (03/2013)
[article]
Titre : Absorption-desorption in tank linings Type de document : texte imprimé Auteurs : Gard Reian, Auteur Année de publication : 2013 Article en page(s) : p. 20-22 Langues : Anglais (eng) Catégories : Absorption
Bateaux -- Revêtements:Bateaux -- Peinture
Désorption
Epoxy phénol novolac
Marines (peinture)
Produits chimiques
Réservoirs (récipients)
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : The absorption-desorption of different cargoes in two different Novolac epoxy tank linings has been investigated and results are presented here. Note de contenu : - Experimental procedures
- Definitions
- Results
- Long-term chemical immersion testingEn ligne : https://drive.google.com/file/d/1QwAaIuedXwlHh0ltvmeTNQwIj1kSQCl2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17984
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Code-barres Cote Support Localisation Section Disponibilité 14891 - Périodique Bibliothèque principale Documentaires Disponible An improved laboratory reattachment method for the rapid assessment of adult barnacle adhesion strength to fouling-release marine coatings / Shane J. Stafslien in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 6 (11/2012)
[article]
Titre : An improved laboratory reattachment method for the rapid assessment of adult barnacle adhesion strength to fouling-release marine coatings Type de document : texte imprimé Auteurs : Shane J. Stafslien, Auteur ; Justin W. Daniels, Auteur ; James A. Bahr, Auteur ; Bret J. Chisholm, Auteur ; Abdullah Ekin, Auteur ; Dean C. Webster, Auteur ; Beatriz Orihuela, Auteur ; Daniel Rittschof, Auteur Année de publication : 2012 Article en page(s) : p. 651-665 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Crustacés
Marines (peinture)
Revêtements antisalissures:Peinture antisalissures
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : Modifications have been made to the previously described adult barnacle laboratory reattachment method to enhance and improve the overall utility of this technique for rapidly assessing the efficacy of novel fouling-release marine coating technologies. These modifications include the use of an immobilization template to secure barnacles onto the coating surfaces during the underwater reattachment process, the development of a semi-automated push-off device to enable consistent and reproducible force gauge measurements and the implementation of a software tool to measure the diameter of barnacle base plates for adhesion strength calculations. A series of experimental siloxane–polyurethane and control coatings were evaluated with both the original and improved laboratory reattachment methodologies. Significantly higher adhesion strengths were obtained on these coatings using the improved reattachment method. Furthermore, only the improved reattachment method was able to discern significant differences in the performance of the siloxane–polyurethane coatings based on differences in compositional components. In this regard, the siloxane–polyurethane coatings containing the poly-caprolactone end groups attached to the poly(dimethylsiloxane) (PDMS) backbone exhibited significantly higher reattached barnacle adhesion strengths than the aminopropyl-terminated PDMS containing coatings. It was also shown that the utilization of barnacles with 5–6 mm base plate diameters, rather than 7–8 mm diameters, significantly enhanced the strength or tenacity of adhesion to the surface of the control coatings. The results of the improved laboratory reattachment evaluation of experimental siloxane–polyurethane and control coatings were in good agreement with barnacle adhesion measurements obtained for the same coatings with static ocean immersion testing in the field. Note de contenu : - EXPERIMENTAL : Coating preparation - Rearing and maintenance of adult barnacles - Reattachment procedure - Measurement of barnacle adhesion in shear - Static ocean immersion testing - Statistical analysis
- RESULTS :Original vs improved laboratory reattachment method - Effect of barnacle basal diameter - Static ocean immersion testingDOI : 10.1007/s11998-012-9409-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9409-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16648
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Code-barres Cote Support Localisation Section Disponibilité 14359 - Périodique Bibliothèque principale Documentaires Disponible Anti-ectoparasite activity of medicinal herbal plant in terms of reducing ectoparasites effect on sheep and goat skins / Fitsum Etefa Ahmed in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 11 (11/2023)
[article]
Titre : Anti-ectoparasite activity of medicinal herbal plant in terms of reducing ectoparasites effect on sheep and goat skins Type de document : texte imprimé Auteurs : Fitsum Etefa Ahmed, Auteur ; Aschalew Shitu, Auteur ; Zerihun Teshome, Auteur ; Endalamaw Yihune, Auteur ; Misganaw Bitew, Auteur ; Mekonnen Fenta Haile, Auteur Année de publication : 2023 Article en page(s) : p. 462-473 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alcaloïdes
Analyse de varianceEn statistique, l'analyse de la variance (terme souvent abrégé par le terme anglais ANOVA : ANalysis Of VAriance) est un ensemble de modèles statistiques utilisés pour vérifier si les moyennes des groupes proviennent d'une même population. Les groupes correspondent aux modalités d'une variable qualitative (p. ex. variable : traitement; modalités : programme d'entrainement sportif, suppléments alimentaires ; placebo) et les moyennes sont calculés à partir d'une variable continue (p. ex. gain musculaire).
Ce test s'applique lorsque l'on mesure une ou plusieurs variables explicatives catégorielles (appelées alors facteurs de variabilité, leurs différentes modalités étant parfois appelées "niveaux") qui ont de l'influence sur la loi d'une variable continue à expliquer. On parle d'analyse à un facteur lorsque l'analyse porte sur un modèle décrit par un seul facteur de variabilité, d'analyse à deux facteurs ou d'analyse multifactorielle sinon. (Wikipedia)
Analyse quantitative (chimie)
Chimie végétale
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Ectoparasites
Ectoparasiticides
Extraits de plantes
Extraits de plantes:Extraits (pharmacie)
Flavonoïdes
Phénols
Plantes médicinales
Saponines
Tanins
Test d'immersionIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Ethiopia has one of the world’s largest livestock resources. However, the effects of disease, inadequate nutrition and management constrain the potential of this resource. Ectoparasites are one of the primary contributing factors in the tanneries for sheep and goat skin rejection. The aim of this study is to assess the impact of medicinal herbal plant extracts on ectoparasites (ticks) on small ruminants in Ethiopia. According to scientific and ethnomedical data gathered from respondents (farmers), the plant species P. dodecandra, E. globulus, C. macrostachyus, J. schimperiana, and C. aurea were used (by farmers) for the study. Phytochemical screening of extracts revealed the presence of flavonoids, alkaloids, phenols and saponins, tannins. Ticks from small ruminants (i.e goat and sheep) were collected and an in vitro adult tick immersion test was carried out using concentrations of 6.25, 12.5, 25, 50, and 100 mg/ml of all medicinal plant extracts. The temporal tick mortality was observed within 24-hours. In order to compare the results, distilled water and 12.5% amitraz was used as positive and negative controls, respectively. After 24 hours of exposure, P. dodecandra, J. schimperiana, and C. macrostachyus extracts had a moderate (60%) effect on tick mortality; however, C. aurea extract at 100 mg/ml and E. globulus extract at 50 mg/ml and 100 mg/ml had the highest mortality rate (80%). The study found that following in vitro treatment for the studied plants, the mean tick mortality increased considerably with increasing concentration and exposure duration. The existence of phytochemicals (active ingredients) in several plants, such as phenols, flavonoids, alkaloids, tannin, saponin, etc., may be the cause of their anti-ectoparasite effects. The study’s findings suggested that these plants might be crucial in reducing the need for chemical based medicines as well as managing the population of resistant ticks in an environmentally friendly manner. Note de contenu : - DATA COLLECTION
- EXPERIMENTAL : Plant collection and drying - Extract preparation - Phytochemical analysis - Test for flavonoids - Test for alkaloids - Test for phenols - Test for tannin - Test for saponins - Adult immersion test
- RESULTS AND DISCUSSION : Preliminary qualitative analysis - Flavonoids detection - Alkaloids detection - Phenols detection - Tannin detection - Saponins detection - FTIR analysis - Adult immersion test
- MODE OF ACTION
- Table 1 : List of medicinal plants used for the treatment of ectoparasite in the area
- Table 2 : Phytochemical analysis
- Table 3 : Two-way analysis of variance (ANOVA)DOI : https://doi.org/10.34314/jalca.v118i11.8240 En ligne : https://drive.google.com/file/d/1wPxcCthkKs4jn4VDBLUYtjK1zOVJ8Isl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40045
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 11 (11/2023) . - p. 462-473[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24291 - Périodique Bibliothèque principale Documentaires Disponible Anti-scratch additive for water-based wood coatings / Michelle Bauer in COATINGS TECH, Vol. 17, N° 8 (08/2020)
[article]
Titre : Anti-scratch additive for water-based wood coatings Type de document : texte imprimé Auteurs : Michelle Bauer, Auteur ; Tanya Hunter, Auteur ; Yvette Gomez, Auteur Année de publication : 2020 Article en page(s) : p. 42-48 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bois -- Revêtements protecteurs
Essais de résilience
Formulation (Génie chimique)
Rayures
Résistance à l'abrasion
Résistance chimique
Revêtements en phase aqueuse -- Additifs
Revêtements organiques
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : Demand for high-performing, water-based coatings continues to be the trend throughout the many coatings market segments. Wood flooring, cabinetry, and furniture coatings segments are a major component of this movement. To support this transition, development of innovative solutions is required to provide improved coatings performance. End users are seeking increased durability and lower environmental impact, which comes with water-based technology. Improved scratch resistance will improve the long-lasting aesthetics and protection that wood coatings provide. A novel, easy-to-use approach to improve scratch resistance in water-based wood coatings has been demonstrated in multiple resin technologies. Performance testing of improved scratch resistance while maintaining good film properties will be presented in a water-based, ultraviolet (UV)-curable system that exceeds performance of current market offerings. Note de contenu : - Table 1 : Evaluated scratch additive chemistries and loading levels based on total formula weight
- Table 2 : Water-based UV formulation utilized to evaluate scratch additive
- Table 3 : Taber abrasion in mg weight loss
- Table 4 : Cross-hatch adhesion results
- Table 5 : Chemical resistance spot test ratings at 24h exposure
- Table 6 : Chemical resistance spot test at 24-h recovery
- Table 7 : Observations of water immersion test
- Fig. 1 : Scratch resistance measured by % gloss loss
- Fig. 2 : Pencil hardness results according to ASTM D3363
- Fig. 3 : Gloss of coatings with each scratch additive post-addition
- Fig. 4 : Haze observations made with film applied to glass and place over an imageEn ligne : https://drive.google.com/file/d/10-V0kMUidcKWAHfqgPb3FGWeusFGgLj7/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34449
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Code-barres Cote Support Localisation Section Disponibilité 21923 - Périodique Bibliothèque principale Documentaires Disponible Anticorrosion and barrier properties appraisal of poly(dimethylsiloxane)–ZnO nanocoating transition from superhydrophobic to hydrophobic state / Innocent O. Arukalam in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
[article]
Titre : Anticorrosion and barrier properties appraisal of poly(dimethylsiloxane)–ZnO nanocoating transition from superhydrophobic to hydrophobic state Type de document : texte imprimé Auteurs : Innocent O. Arukalam, Auteur ; Ying Li, Auteur Année de publication : 2019 Article en page(s) : p. 1077-1088 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Hydrophobie
Matériaux -- Propriétés barrières
Mouillabilité
Oxyde de zinc
Revêtements protecteurs
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : The anticorrosion and barrier properties of poly(dimethylsiloxane) (PDMS)–ZnO nanocoating transition from superhydrophobic to hydrophobic state have been evaluated. The main objective was to appraise the durability performance of anticorrosion and barrier properties of the pristine superhydrophobic coating and its hydrophobic state after long-term exposure to marine water. Thus, water wettability, surface features, and corrosion resistance, as well as barrier performance of the 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane-modified PDMS–ZnO coating were evaluated after 15 cycles (1 h to 60 days) of immersion in 3.5 wt.% NaCl solution. The evaluations were made by use of surface analytical, physicochemical, and electrochemical techniques. The results show that the coating transformed from superhydrophobic state (after 1 h) to hydrophobic state (after 60 days). The transition was due to effect of corrosiveness of the salty water and disappearance of the surface air layer with consequent reduction in the surface roughness and increase in the porosity of the coating. Correspondingly, the value of the impedance modulus decreased from 4.257 × 109 Ω cm2 (after 1 h) to 7.175 × 108 Ω cm2 (after 60 days). The trend of coating film (Rcf) and charge transfer (Rct) resistances with immersion time was found to be somewhat stable after 40-day immersion time. The observed high values of impedance modulus (|Z|f=0.01 Hz), Rcf and Rct after 60 days of immersion clearly demonstrate that the anticorrosion property and barrier performance of the transformed hydrophobic PDMS–ZnO coating were good. Note de contenu : - Wettability results of the coating
- Results of surface microstructure and roughness of the coating
- Chemical composition of the superhydrophobic PDMS-ZnO nanocoating
- Electrochemical impedance spectroscopy (EIS) results
- Effect of wetting and immersion time on the anticorrosion behavior of the coatingDOI : 10.1007/s11998-018-00182-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00182-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32863
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Code-barres Cote Support Localisation Section Disponibilité 21127 - Périodique Bibliothèque principale Documentaires Disponible Broadening the application range / Jean-paul Lecomte in EUROPEAN COATINGS JOURNAL (ECJ), N° 5 (05/2016)
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PermalinkCuirs et peaux. Détermination de l'absorption d'eau par un cuir (essai statique) - Norme NF G 52-009 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1972)
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