Biodegradable surfactants do not improve antifouling or fouling-release performance of polydimethylsiloxane / Emmerson R. Wilson in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 4 (07/2024) . - p. 1217-1229 Titre : Biodegradable surfactants do not improve antifouling or fouling-release performance of polydimethylsiloxane Type de document : texte imprimé Auteurs : Emmerson R. Wilson, Auteur ; Katerina Basque, Auteur ; Meaghan MacDonald, Auteur ; Amelia F. MacKenzie, Auteur ; Michelle Hodgson, Auteur ; Robin Stuart, Auteur ; Truis Smith-Palmer, Auteur ; Russell C. Wyeth, Auteur Année de publication : 2024 Article en page(s) : p. 1217-1229 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aquaculture Biosurfactants Polydiméthylsiloxane Le 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. Revêtements antisalissures Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Surfaces that combine low-toxicity antifouling effects with fouling-release properties are an intriguing possibility for developing effective measures against marine biofouling. This study field tested siloxane-based fouling-release surfaces enhanced by adding biodegradable surfactants. Two different surfactants were added to a standard polydimethylsiloxane (PDMS) surface, as well as to PDMS soaked in silicone oil, and compared to controls without surfactant augmentation. Antifouling and fouling-release performance was assessed over 11 to 13 weeks against the most prominent fouling species at three locations in Cape Breton, Nova Scotia, Canada. Using nonlinear mixed effect analysis, surfactants were found to have little impact on the progression of biofouling on PDMS without silicone oil in all three sites and had no additional impact on the progression of biofouling on PDMS augmented with silicone oil. (Silicone oil was found to delay biofouling in PDMS without other additives.) Given the known toxicity of some surfactants to invertebrate larvae, future efforts should consider either higher concentrations or alternative varieties for incorporation into fouling-release surfaces. Note de contenu : - MATERIALS AND METHODS : Treatments - Contact angles - Experiment - Measurement of percent cover - Statistical analysis of percent cover - Measurement and statistical analysis of removal times - Software - RESULTS : Percent cover - Removal time - Contact angles DOI : https://doi.org/10.1007/s11998-023-00884-2 En ligne : https://drive.google.com/file/d/1pxkh9EdpR9LVAIlixjfdmAaR9BDhfLOt/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41292 [article]

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Marine biofouling inhibition by polyurethane conductive coatings / Jer-Ruey Huang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 1 (01/2010)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 1 (01/2010) . - p. 111-117 Titre : Marine biofouling inhibition by polyurethane conductive coatings Type de document : texte imprimé Auteurs : Jer-Ruey Huang, Auteur ; Wei-Ting Lin, Auteur ; Ran Huang, Auteur ; Chih-Yang Lin, Auteur ; Jiann-Kuo Wu, Auteur Année de publication : 2010 Article en page(s) : p. 111-117 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aquaculture Conducteurs organiques Graphite Marines (peinture) Noir de carbone Polyuréthanes Revêtements antisalissures:Peinture antisalissures Index. décimale : 667.9 Revêtements et enduits Résumé : The purpose of the present study is to develop a new conductive coating for application on fishing nets that can be used as an anode, while submersed in the sea, to generate free chlorine which will in turn inhibit marine biofouling. To confirm the durability and viability of this coating, long-term field tests were carried out in the Nanao harbor in Taiwan. Electrical resistivity tests showed that polyurethane resin with carbon black and graphite can demonstrate the lowest resistivity: 0.06 Ωm. This sample also generated optimal quantities of free chlorine, which performs excellent antifouling properties. The use of carbon black in conjunction with graphite did prove to yield greater benefits. A 500-day field test showed that the PU-CG conductive coatings reduced the quantity of marine biofouling attached to the cage by approximately 79%. Furthermore, the chlorine produced was within safe levels, and judged not to pollute the sea. However, this antifouling system still shows durable problems which remain to be considered. DOI : 10.1007/s11998-008-9151-3 En ligne : http://download.springer.com/static/pdf/703/art%253A10.1007%252Fs11998-008-9151- [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8354 [article]

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Prevention of biofouling on aquaculture nets with eco-friendly antifouling paint formulation / Korhan Sen in COLORATION TECHNOLOGY, Vol. 136, N° 2 (04/2020)

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 2 (04/2020) . - p. 120-129 Titre : Prevention of biofouling on aquaculture nets with eco-friendly antifouling paint formulation Type de document : texte imprimé Auteurs : Korhan Sen, Auteur ; Umit Halis Erdogan, Auteur ; Levent Cavas, Auteur Année de publication : 2020 Article en page(s) : p. 120-129 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Aquaculture Caractérisation Chimie écologique Colorimétrie Filets de pêche Revêtements antisalissures:Peinture antisalissures Index. décimale : 667.3 Teinture et impression des tissus Résumé : Aquaculture, which is an important part of food supply, is usually carried out in cage nets made of textile materials. Fouling organisms settle on the cage nets over time, close the mesh openings, and cause unwanted weight gain. In order to prevent fouling, aquaculture nets are generally treated with antifouling paints. In this paper, warp knitted cage nets made from various raw materials were treated with three different antifouling paints. Econea was used as a biocide to prepare an eco‐friendly antifouling paint formulation, and two copper‐based commercial antifouling paints were supplied for comparison. Antifouling paint‐treated and untreated net samples were immersed in a marine ecosystem next to an aquaculture zone for 6 months. Settlement of fouling organisms on nets was observed by taking underwater photographs at periodic intervals. Following the field study, changes in the structure of the nets and antifouling performance of the paints were evaluated considering the results of underwater photographs, biomass growth, variation in mass and strength tests. Colour fastness of the antifouling paints to sea water was also measured to learn about biocide release and surface hydrophobicity. The results show that copper‐free eco‐friendly antifouling paint is just as effective against the fouling mechanism for all types of nets as copper‐based commercial antifouling paints. The novel eco‐friendly formulation has promising results, which provides an alternative for producers when considering the selection of raw materials. Note de contenu : - EXPERIMENTAL : Materials - Preparation of AP-3 - Applications of APs - Field study - Characterisation of untrated and treated ANs - RESULTS AND DISCUSSION : Mass variations in ANs - Assessment of colour measurements - Colour fastness to sea water - Tensile properties of nets - Field study - SEM observation - Table 1 : Properties of aquaculture nets (ANs) and antifouling paints (APs) - Table 2 : Composition of antifouling paint 3 (AP-3) - Table 3 : Antifouling paint (AP)-treated nets and their abbreviations - Table 4 : Pick-up values and mass loss of aquaculture nets - Table 5 : Colorimetric values of the untreated and antifouling paint (AP)-treated nets before and after the field study DOI : https://doi.org/10.1111/cote.12454 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34231 [article]

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