Application of marine biotechnology in the production of natural biocides for testing on environmentally innocuous antifouling coatings / Emilio Eguia in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 4, N° 2 (06/2007) . - p. 191-202 Titre : Application of marine biotechnology in the production of natural biocides for testing on environmentally innocuous antifouling coatings Type de document : texte imprimé Auteurs : Emilio Eguia, Auteur ; Alfredo Trueba, Auteur Année de publication : 2007 Article en page(s) : p. 191-202 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens -- Suppression ou remplacement Biotechnologie marine Produits naturels Revêtements antisalissures:Peinture antisalissures Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Salissures biologiques Index. décimale : 667.9 Revêtements et enduits Résumé : The widely recognized biofouling phenomenon has many negative consequences for artificial structures that are in contact with seawater in the form of structural defects and additional expenses for maritime companies due to cleaning and prevention processes. After having analyzed the serious environmental problems caused by an indiscriminate use of highly toxic biocides coming from organic derivatives of tin compounds and the uncontrolled emissions of volatile organic compounds (VOC) to the atmosphere, the evolving technology of antifouling paintings (further mandated by current environmental standards) aims to develop environmentally innocuous water-based coverings in which extracts of the very same marine world are used as biocide compounds. Water-based coatings are being developed that use low-toxic elements and natural biocides, where bacteria is isolated from surfaces immersed in the marine environment, creating a promising source of natural antifouling compounds. The result is a new environmentally friendly antifouling coating that is able to mitigate the problem of biofouling without affecting the surrounding medium, and which may be applied on any artificial structure in contact with seawater. DOI : 10.1007/s11998-007-9022-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9022-3.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3661 [article]

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Challenging preservation options / Jessica Levin in EUROPEAN COATINGS JOURNAL (ECJ), N° 5 (05/2020)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2020) . - p. 28-33 Titre : Challenging preservation options : Towards biocide-free water-borne coatings via innovative binders and additives Type de document : texte imprimé Auteurs : Jessica Levin, Auteur ; Wenqin Wang, Auteur Année de publication : 2020 Article en page(s) : p. 28-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens -- Suppression ou remplacement Contamination microbienne Copolymère styrène acrylique Epaississants Formulation (Génie chimique) Liants en phase aqueuse Peinture -- Conservation Polyacryliques Polyuréthane éthoxylé modifié de façon hydrophobe Revêtements en phase aqueuse -- Additifs Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Increasing regulatory restrictions mean that there are limited preservation options currently available to the paint and coatings industry for both in-can and dry-film preservation. Experimental binders and thickeners that are more robust to microbial spoilage offer a potential solution and pass challenge testing even when formulated into water-borne paints. Note de contenu : - Regulations necessitate new preservation methods - Commercially available solutions are limited - Emergins technologies offer potential - Development of robust raw materials for standard pH coatings - Binders more robust against microbial spoilage - Paint formulated with experimental binders passes challenge tests - HEUR rheology modifiers that are less prone to microbial spoilage - Path to reducing spoilage without biocides - Fig. 1 : Paint performance data on paints based on commercial and experimental soft styrene acrylic binders - Fig. 2 : Microbial challenge test plates 7 days after challenge 2 - Fig. 3 : A styrene acrylic paint was thickened with various HEURs added at 1.2 kg of polymer actives per 1000 I of paint. The bubble size is proportional to the Brookfield viscosity - Table 1 : Rating system for estimating the level of microbial contamination on streak plates - Table 2 : Microbial challenge test results for various acrylic and styrene acrylic binders at pH 7.0-9.5 supplied without biocide - Table 3 : Paint formulation based on commercial and experimental soft styrene acrylic binders - Table 4 : Microbial challenge test results for various HEUR rheology modifiers supplied without biocide added. Growth rating in parentheses as describes in Table 1 - Table 5 : Styrene acrylic screening formulation used to test type. 1. Type 2, and type 3 HEURs for thickening performance En ligne : https://drive.google.com/file/d/1qZ0eMaU48b8cVGe97f2VUowmbbfvbaSS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34174 [article]

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Challenging preservation options / Jessica Levin in COATINGS TECH, Vol. 17, N° 5 (05/2020)  

[article]  inCOATINGS TECH > Vol. 17, N° 5 (05/2020) . - p. 40-45 Titre : Challenging preservation options : Towards biocide-free waterborne coatings via innovative binders and additives Type de document : texte imprimé Auteurs : Jessica Levin, Auteur ; Wenqin Wang, Auteur ; Stan Brownwell, Auteur ; Tara Conley, Auteur ; Erica Frankel, Auteur ; John J. Rabasco, Auteur ; Deb Graves, Auteur ; Adrian Ward, Auteur Année de publication : 2020 Article en page(s) : p. 40-45 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens -- Suppression ou remplacement Copolymère styrène acrylique Epaississants Formulation (Génie chimique) Liants Liants en phase aqueuse Polyacryliques Polyuréthane éthoxylé modifié de façon hydrophobe Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Increasing regulatory restrictions mean that there are limited preservation options currently available to the paint and coatings industry for both in-can and dry-film preservation. Experimental binders and thickeners that are more robust to microbial spoilage offer a potential solution and pass challenge testing even when formulated into waterborne paints. Water-based products are susceptible to microbial contamination. Contamination can be introduced during a variety of stages in the product life cycle, including manufacturing and packaging of the products ; "in can" during periods of storage, transportation, transfer, and usage; or on the dry film after application. Microbial susceptibility can cause product degradation, reduce product performance, or even induce hygiene and human health issues, which could result in a wide range of possible consequences, including product recall, customer complaints, reduced perception of product quality, production stoppage, etc. For these reasons, manufacturers add biocides to their waterborne products. There are three aspects of coating preservation. The first is in-can preservation, which protects all liquid-state products with preservatives. The second aspect of preserving coatings is dry-film protection, which protects coatings from microbes in application areas such as in bathrooms, kitchens, and on exterior surfaces. Lastly, plant hygiene is critical for coatings preservation. If a tank or a pipe becomes contaminated, it can contaminate the final product. Each of these three aspects requires a different approach for preservation. From the consumer’s perspective, the biocides that are present in the final product are the most important: both for in-can and dry-film preservation. Ideally, antimicrobial materials would maximize efficacy, while minimizing toxicity and environmental persistence. Active antimicrobial ingredients need to be stable within the shelf life of the product to maintain product quality, but also biodegradable when exposed to the environment to deliver eco-friendly products. Furthermore, they need to be effective against microbes but non-toxic to other life forms. Balancing these needs is difficult to achieve in reality. Note de contenu : - REGULATIONS NECESSITATE NEW PRESERVATION METHODS : Commercially available solutions are limited - Emerging technologies offer potential - DEVELOPMENT OF ROBUST RAW MATERIALS FOR STANDARD PH COATINGS : Experimental - Binders more robust against microbial spoilage - Paint formulated with experimental binders passes challenge tests - HEUR rheology modifiers that are less prone to microbial spoilage - Path to reducing spoilage without biocides - Table 1 : Rating system for estimating the level of microbial contamination on streak plates - Table 2 : Microbial challenge test results for various acrylic and styrene acrylic binders at pH 7.0-9.5 supplied without biocide - Table 3 : Paint formulation based on commercial and experimental soft styrene acrylic binders - Table 4 : Microbial challenge test result for various HEUR rheology modifiers supplied without biocide added, including the growth rating in parentheses as described in table 1 - Table 5 : Styrene acrylic screening formultion used to test type 1, type 2, and type HEURs for thickening performance - Fig. 1 : Paint performance data on paints based on commercial and experimental soft styrene acrylic binders - Fig. 2 : Microbial challenge test plates seven days after challenge 2 En ligne : https://drive.google.com/file/d/1B0ac2Mg2sNEOI-g5PpL-_xwhr9AZg14W/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34305 [article]

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Eco-friendly disinfection with lactic acid / Katja von Nessen in SOFW JOURNAL, Vol. 143, N° 10 (10/2017)  

[article]  inSOFW JOURNAL > Vol. 143, N° 10 (10/2017) . - p. 4-9 Titre : Eco-friendly disinfection with lactic acid Type de document : texte imprimé Auteurs : Katja von Nessen, Auteur ; Felix Weiher, Auteur ; Martin Peter Neubauer, Auteur Année de publication : 2017 Article en page(s) : p. 4-9 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens -- Suppression ou remplacement Désinfectants Désinfection Formulation (Génie chimique) Lactique, Acide L'acide lactique est un acide organique qui joue un rôle dans divers processus biochimiques. Un lactate est un sel de cet acide. Contrairement à ce que peut laisser penser son nom, l'acide lactique n'est pas présent uniquement dans le lait, mais également dans le vin, certains fruits et légumes, et dans les muscles. L'acide lactique est un acide alpha hydroxylé, sa formule chimique est C3H6O3 et sa structure se reflète dans son nom systématique, l'acide 2-hydroxypropanoïque. Surfactants Index. décimale : 668.5 Parfums et cosmétiques Résumé : Efficient bacterial disinfection is easy to realise. Efficient bacterial disinfection with an active substance from natural origin, readily biodegradable and safe in use, is a more challenging target to achieve. Only a few substances available on the market fulfil these criteria. One such substance is L(+)-lactic acid, and previous studies have already substantiated its basic biocidal performance. In this paper we present additional data proving the efficacy of lactic acid even under more demanding conditions such as elevated pH or short contact times. We will show that lactic acid offers a veritable alternative to traditional, synthetic biocides, supporting eco-friendly and sustainability claims in disinfectant formulations. Note de contenu : - REGULATORY BACKGROUND - TEST METHODS - RESULTS : Efficacy screening of various lactic acid/surfactant combinations En ligne : https://drive.google.com/file/d/1q0z3pmNPM08PgUxt9GU8TyZRA3odgpsp/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29271 [article]

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Eco-shield for paints in EUROPEAN COATINGS JOURNAL (ECJ), N° 9 (09/2017)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 9 (09/2017) . - p. 48-53 Titre : Eco-shield for paints : Multifunctional organoclay composition offers clean-tech protection Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 48-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens -- Suppression ou remplacement Argile Essais accélérés (technologie) Essais dynamiques Hydrophilie Hydrophobie Protection contre le rayonnement ultraviolet Résistance à la compression Revêtements -- Additifs Revêtements -- Analyse Revêtements -- Propriétés mécaniques Revêtements en bâtiment Smectite Index. décimale : 667.9 Revêtements et enduits Résumé : Current and future restrictions on biocides are forcing manufacturers of building finishing materials to seek alternative products. A novel multifunctional organoclay additive has been developed by focusing on mineral materials that control coating degradation and which can be used in bulding or finishing materials such as plasters, mortars, primers, paints and other protective or decorative coatings. Note de contenu : - Smectite clay to improve functionality - Clean technology for novel organoclay - Hydrophobic and hydrophilic functionality - UV protection - Zero-leaching product safe to use - Added benefits indicate potential for broader application - FIGURES : 1. Intercalation of organic surfactant between layers of clay considerably increases the basal spacing of the layer (d) < d2) and also changes the clay surface properties from hydrophilic to hydrophobic - 2. X-ray powder diffraction data for mechanochemically modified SWy-2 with different aliphatic quaternary ammonium salts (carbon chaing length varies from C8 to C18) - SEM pictures of raw and mechanochemically organophilised SWy-2 particle aggregates - 4. The total colour difference of CIELAB versus the non-treated part on the sample - 5. The tested compression strength of the samples - 6. The tested tension strength of the samples - 7. The appearance of the traditional lime paint after the 6 month field test exposure En ligne : https://drive.google.com/file/d/1sqz_V8klcwBLUxcSvWprvOMk1NPEIcZ-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29037 [article]

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Les substances naturelles : une alternative aux pesticides de synthèse / Laure Mamy in L'ACTUALITE CHIMIQUE, N° 470 (02/2022)  

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Sustainable biocides : perspectives in in-can paint preservation / K. M. Sreenivas in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 207, N° 4628 (02/2017)  

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The future of anti-fouling coatings / Marco Heuer in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2022)  

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