Binders with benefits / Magdalena Spicher in EUROPEAN COATINGS JOURNAL (ECJ), N° 10 (10/2021)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > N° 10 (10/2021) . - p. 34-39 Titre : Binders with benefits : Plant proteins can replace acrylate binders and add oxygen-barrier and adhesion properties, too Type de document : texte imprimé Auteurs : Magdalena Spicher, Auteur ; Paula Goderbauer, Auteur ; Andreas Fetzer, Auteur Année de publication : 2021 Article en page(s) : p. 34-39 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Additifs Chimie écologique Liants en phase aqueuse Matériaux -- Propriétés barrières Produits chimiques -- Suppression ou remplacement Protéines végétales Ressources renouvelables Index. décimale : 667.9 Revêtements et enduits Résumé : Plant proteins have interesting properties, especially film formation. Along with their oxygen barrier and adhesion, they are a renewable alternative to acrylate binders in water-borne coatings. Tuning of the isolation conditions and product properties, including the use of additives, defines the property profile of the coating. Protein-based binders can serve in adhesives or coatings for the packaging industry. Note de contenu : - New, environmentally, and ethically sound coatings - Three ways toadjust plant protein properties - Stabilising effects on different protein isolates - Protein suspension as basis for sustainable coatings - Can additives help ? - UV activation is best - Benefits of plasticisers and tackifiers - Fig. 1 : Process scheme for protein isolation from plant materials and ophional modification/formulation steps - Fig. 2 : Protein solubility profile in aqueous solution of different protein isolates - Fig. 3 : The composition of the solvent system strongly influences the dispersibility of plant-based proteins : pure water or suitable solvent mixtures allow a homogeneous protein suspension for the coating process but, if the composition of the solvent mixture is unsuitable, large protein aggregates form and the protein is barely dispersible in the solvent mixture and the processability of the coating is impaired. For good usability on industrial plants, a reduction in the water content is desirable - Fig. 4 : Oxggen permeation coefficients of protein layer, using different crosslinking agents in twa different concentrations, coated between PET and paper. The experiments were conducted in two different series, each shown on one graph. The data from the three test series are only partially comparable due ta differences in drying Lime as well as storage lime until the analgsis could be performed. Means denoted by a different letter indicate significant differences in the oxygen permeation coefficients [p<0.05] - Fig. 5 : : Oxygen permeation coefficients and bond strength of protein layer, using different plasticisers, coafed between HDPE and paper. Means denoted by a different letter indicate significant differences in the oxygen permeation coefficients [p<0.05) - Fig. 6 : Bond strength of protein layer using different tackifiers, coafed between HDPE and paper. Means denoted by a different leder indicate significant differences in the bond strength (p<0.0 5) - Table 1 : Effect of different additives on the stability of aqueous solutions of protein isolates (1 0/0/5 %); ++: stable for > 2 months without any aggregation, +: stable for > 2 months with minor aggregation, not stable, - -:formulation not possible - Table 2 : Crosslinking agents used for protein-based coatings En ligne : https://drive.google.com/file/d/1Cj7yHB8l86uNi8zXqq4C7lxFa4YvP2Uu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36419 [article]

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