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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Reinforcement effects of multiwall carbon nanotubes and graphene oxide on PDMS marine coatings / Levent Cavas in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 1 (01/2018) . - p. 105–120 Titre : Reinforcement effects of multiwall carbon nanotubes and graphene oxide on PDMS marine coatings Type de document : texte imprimé Auteurs : Levent Cavas, Auteur ; Pelin Gokfiliz Yildiz, Auteur ; Paraskevi Mimigianni ; Andreas Sapalidis ; S. Nitodas Année de publication : 2018 Article en page(s) : p. 105–120 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Marines (peinture) Oxyde de graphène 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 -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Index. décimale : 667.9 Revêtements et enduits Résumé : Poly (dimethyl siloxane) (PDMS) is a model silicon elastomer used as marine fouling-release coating, because it meets the fouling-release zone conditions of the Baier curve. However, weak mechanical properties limit its use. In this aspect, incorporation of carbon nanoparticles into PDMS is a common method for improving its mechanical properties. Since effective dispersion of nanofillers into polymer matrices is a challenge, a major aim of this study was to examine the PDMS mechanical reinforcement by developing different dispersing methods of pristine MWCNTs into PDMS matrix. SEM images of nanocomposites prepared using dispersion methods 1 and 2 revealed the formation of aggregates which subsequently affected the overall mechanical performance of the samples. Also, the effect of p-MWCNTs content and nanoparticle type [carboxyl-functionalized-MWCNTs, graphene oxide (GO)] on the mechanical properties of the nanocomposites was evaluated. Incorporation of p-MWCNTs did not alter drastically the critical surface energy value of neat PDMS, which subsequently influenced antifouling and cleaning performance of nanoreinforced coatings. To evaluate antifouling and cleaning performance of the nanocomposite coatings, seawater immersion tests were conducted. In conclusion, MWCNTs and GO increased the mechanical strength of the matrix, whereas they contributed to a small extent to the improvement in antifouling and cleaning performance of the composites. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS :Materials - Dispersion methods - Tensile testing of PDMS composites with carbon nanoparticles - Characterization of surfaces - Carbon nanoparticles-filled PDMS marine nanocoatings - Seawater immersion tests - RESULTS AND DISCUSSION : The effect of dispersion methods - Reinforcement effect of carbon nanoparticles on PDMS - Seawater immersion test DOI : 10.1007/s11998-017-9956-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9956-z.pdf Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30090 [article]

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