100% renewable ethoxylated surfactants / Steven Y. Chan in COATINGS WORLD, Vol. 23, N° 8 (08/2018)  

[article]  inCOATINGS WORLD > Vol. 23, N° 8 (08/2018) Titre : 100% renewable ethoxylated surfactants Type de document : texte imprimé Auteurs : Steven Y. Chan, Auteur ; Nathan Noyes, Auteur Année de publication : 2018 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biosurfactants Éthoxylation alcools et phénols, généralement pour produire de puissants agents surfactants ou mouillants. Micelles Oxyde d'éthylène L'oxyde d'éthylène, ou 1,2-époxyéthane, oxyde de diméthylène, oxacyclopropane, ou encore oxirane est un composé organique, le plus simple de la classe des époxydes. Il est important pour l'industrie chimique, entre autres dans la production d'éthylène glycol, ainsi que dans les industries pharmaceutique et agroalimentaire. Ressources renouvelables Structure chimique Surfactants -- Synthèse Index. décimale : 667.9 Revêtements et enduits Résumé : As consumer awareness of the products and chemicals they use rises, many chemical companies are also striving to become more environmentally responsible. The trend in the coatings industry is toward low/zero VOC products, and many innovations in coatings technology are based on sustainable or green chemistries. The market increasingly demands the use of renewable ingredients to reduce the carbon footprint, and many chemical and coating manufacturers are striving to become more environmentally responsible. This trend is driven by a number of factors, including evolving consumer perceptions and awareness regarding the products and chemicals they use, regulatory/certification bodies and programs such as USDA BioPreferred®, and the growing implementation of corporate sustainability initiatives. Bio-based ethylene oxide (EO) will meet this demand by enabling the synthesis of various ethoxylated surfactants and emulsifiers which are 100% bio-based. Ethoxylation is a common process used to generate a range of products for emulsification and wetting, including ethoxylated alcohols, carboxylic acids and esters. While the hydrophobic portions of many of these surfactants are already naturally sourced from plant oils, only petrochemical-derived EO has been available in North America until this time. With the production of bio-based EO in the near future, ethoxylated products can now be produced from 100% bio-based content, allowing customers to choose fully renewable products without sacrificing performance. In addition, by incorporation into synthetic base materials, the bio-based content can be significantly increased, allowing formulators to meet challenging new targets. Note de contenu : - Surfactant fundamentals - The issue of petroleum feedstocks - USDA bio - Preferred program - Renewable surfactants - Fig. 1 : General surfactant structure - Fig. 2 : pherical micelle of surfactant in water - Fig. 3 : Surfactant classification - Fig. 4 : Global greenhouse gas emission - Fig. 5 : The carbon dioxide cycle - Fig. 6 : Minimum bio-based content for USDA BioPreferred program - Fig. 7 : Illustration of oleochemical derivatives - Fig. 8 : BrijTM surfactant – C12 linear alcohol ethoxylate - Fig. 9 : TweenTM 20, ethoxylated sorbitol - Fig. 10 : MyrjTM, ethoxylated fatty acids and CrodafosTM, ethoxylated phosphate esters - Fig. 11 : New Bio-based EO plant in Delaware - Fig. 12 : Petroleum-based and bio-based processes for ethylene oxide - Fig. 13 : Flow diagram of an integrated Ethanol-to-EO/EG Process - Fig. 14 : 100% renewable surfactant En ligne : https://www.coatingsworld.com/issues/2018-08-01/view_features/100-renewable-etho [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32516 [article]

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Facile synthesis of a cardanol-based levelling agent as a biodegradable alternative to tristyrylphenol ethoxylates for the dyeing of polyester fabric / Kun Chen in COLORATION TECHNOLOGY, Vol. 138, N° 3 (06/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 3 (06/2022) . - p. 266-277 Titre : Facile synthesis of a cardanol-based levelling agent as a biodegradable alternative to tristyrylphenol ethoxylates for the dyeing of polyester fabric Type de document : texte imprimé Auteurs : Kun Chen, Auteur ; Jiefang He, Auteur ; Benjamin Tawiah, Auteur ; Xiangdong Zhou, Auteur ; Yuyang Zhou, Auteur Année de publication : 2022 Article en page(s) : p. 266-277 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Cardanol Éthoxylation alcools et phénols, généralement pour produire de puissants agents surfactants ou mouillants. Fibres polyesters Oligomères Produits chimiques -- Biodégradation Solidité de la couleur Surfactants -- Suppression ou remplacement Teinture -- Fibres textiles synthétiques Index. décimale : 667.3 Teinture et impression des tissus Résumé : To reduce the overdependence on petroleum-based surfactants for the dyeing of polyester fabrics, a series of biodegradable cardanol-based polyethoxylate oligomers (CPm, m = 5, 7 and 9) were synthesised by ethoxylation of cardanol with ethylene oxide. The synthesised compounds were characterised and confirmed by Fourier Transform–infrared spectroscopy and proton nuclear magnetic resonance spectroscopy. In addition, the physical, biodegradable and dyeing-assisting properties of CPm were evaluated through comparison with tristyrylphenol ethoxylates (A typical commercial surfactant). Results revealed that CPm showed a higher hydroxyl value, better dispersing capability and a higher migration percentage than tristyrylphenol ethoxylates. Specifically, CP5 (0.5 g/L) improved the migration percentage by 12.03% compared with tristyrylphenol ethoxylates. The migration performance of the surfactants followed a descending order of CP5 > CP7 > CP9 > tristyrylphenol ethoxylates. Importantly, CP5 displays a higher degradation propensity than tristyrylphenol ethoxylates, demonstrating its biodegradable merit. In summary, the cardanol-based polyethoxylates synthesised through this research are promising biodegradable and effective alternatives to conventional levelling agents for disperse dyeing, which contributes a new strategy to the sustainable development of the textile industry. Note de contenu : - EXPERIMENTAL : Materials - Synthesis - Characterisations - Dyeing process - RESULTS AND DISCUSSION : Characterisations of CPm - Dyeing performance - Table 1 : Physical properties and surface activity of the CP series and TSPEOs - Table 2 : Biodegradation capabilities of CP5 and TSPEOs - Table 3 : Colour fastness of dyed fabric using CP5 and TSPEOs DOI : https://doi.org/10.1111/cote.12588 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12588 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37856 [article]

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Rheological assessments / Lisa M. Fine in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 198, N° 4527 (08/2008)  

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 198, N° 4527 (08/2008) . - p. 39-42 Titre : Rheological assessments Type de document : texte imprimé Auteurs : Lisa M. Fine, Auteur ; Charles Palmer, Auteur Année de publication : 2008 Article en page(s) : p. 39-42 Langues : Anglais (eng) Catégories : Dispersions et suspensions Dynamique moléculaire Encre Éthoxylation alcools et phénols, généralement pour produire de puissants agents surfactants ou mouillants. Pigments Rhéologie Solutions de polymère Surfactants Viscosité Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : In this paper, we assesse the effects of polymer/surfactant interactions in a pigmented water-based dispersionusing rheology, so, it was noted that : 1. Higher levels of ethoxylation led to much lower disper-sion and ink viscosities, and minimisation of pseudo-plastic behaviour. 2. Higher levers of ethoxylation led to higher polymer solution viscosities. 3. In general, with the exception of the octylphenol ethoxylates, more hydrophobie polymers and surfactants decreased the acrylic solution polymer viscosities to a greater degree, possibly due to a screening effect and conformational changes in the polymer. 4. For a given hydrophobe, higher ethoxylation levels led to lower viscosity and elasticity and generally higher print strength in inks. 5. Difunctional surfactants can lead to bridging effects, increasing polymer solution viscosities as well as dispersion and ink viscosities. 6. Lower dispersion viscosities allow for higher pigment loadings during manufacture. 7. Extensional properties have to be considered in the future to fully understand what is occurring. The interactions between polymers, surfactants and pigments can be useful or detrimental to the characteristics of a formulation depending on its end use. Effects on rheology, adsorption at pigment/vehicle interfaces, and surface tension are common. Formulating with surfactant/polymer complexes that have the ability to nnodify the rheology of the system or enhance adsorption at the pigment surface can provide synergistic benefits. These will lead to better printability and press performance. Note de contenu : - Polymer solutions - Dispersion viscosities - Dispersion colour development - Ink study - Rheometric evaluation En ligne : https://drive.google.com/file/d/1ztT4ebR2of53rnHke03OzMR_Hc3EaQx6/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27173 [article]

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