Fabrication of hydrophobic coatings on paper substrates using silicone oil impregnated silica : a promising sustainable packaging material / Angitha Francy in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 3 (05/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 3 (05/2024) . - p. 1131-1144 Titre : Fabrication of hydrophobic coatings on paper substrates using silicone oil impregnated silica : a promising sustainable packaging material Type de document : texte imprimé Auteurs : Angitha Francy, Auteur ; T. M. Ragi, Auteur ; A. Peer Mohamed, Auteur ; S. Ananthakumar, Auteur Année de publication : 2024 Article en page(s) : p. 1131-1144 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Huile de silicone Hydrophobie Matériaux -- Imprégnation Matériaux d'emballage Matériaux fibreux Nanoparticules Papier -- Revêtements Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Revêtements organiques Revêtements protecteurs Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Index. décimale : 667.9 Revêtements et enduits Résumé : Paper substrates possessing features ranging from hydrophobic to oxygen-barrier functional properties are gaining great attention recently due to the global ban on single-use plastics as well as the compulsion to avoid nonbiodegradable polymer packing. In this work, hydrophobic silica carriers are processed first through a direct physical impregnation of silicone oil in various amounts into the 20-nm sized silica nanoparticles and subsequently analyzed for the progressive changes in the surface hydrophobicity by water contact angle measurements. The hydrophobic nano-silica was also systematically analyzed by XRD, TGA, FTIR, SEM, and TEM and the results are presented. It was found that the nano-silica with the bulk BET surface area of 157 m2/g can accommodate 2.5 g of silicone oil per gram of silica, finally resulting in hydrophobic silica with a maximum contact angle of 139°. Later, this hydrophobic nano-silica was dispersed in a polymethylmethacrylate (PMMA) matrix and a coating formulation was prepared to develop water-repellent self-cleaning functional coatings on eco-friendly paper substrates. While applied as topcoats on paper substrates, the hydrophobic silica-PMMA gets embedded into the porous fibrous cellulose network and converts it into an impressive water-repellent packaging material with a contact angle of about 142°. This facile inorganic–organic hybrid topcoat strategy was successfully applied on the fibrous cellulose sludge waste produced by the paper mills to produce lightweight, water/moisture resistance packing material for circular economy. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of hydrophobic silica - Preparation of hydrophobic coatings on paper substrates - Self-cleaning test of paper substrates - Water vapor permeability test of paper samples - Characterizations - RESULTS AND DISCUSSION : Characterizations of siliconized silica - Characterizations of SS-PMMA hybrid coatings on paper substrates - Wettability of SS-PMMA hybrid-coated paper substrates - Water vapor transmission and moisture-resistant properties of paper substrates - Mechanical and chemical properties of paper substrates DOI : https://doi.org/10.1007/s11998-023-00882-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00882-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41082 [article]

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Packaged sustainably : Gable top cartons as an ecological packaging alternative for liquid non-food products / Dirk Endlich in SOFW JOURNAL, Vol. 150, N° 5 (05/2024)

[article]  inSOFW JOURNAL > Vol. 150, N° 5 (05/2024) . - p. 40-43 Titre : Packaged sustainably : Gable top cartons as an ecological packaging alternative for liquid non-food products Type de document : texte imprimé Auteurs : Dirk Endlich, Auteur Année de publication : 2024 Article en page(s) : p. 40-43 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cartonnages Consommation durable Emballages -- Aspect de l'environnement Matériaux d'emballage Matières plastiques -- Suppression ou remplacement Index. décimale : 664.09 Conditionnement et emballage Résumé : Manufacturers of liquid non-food products are challenged with making their packaging as sustainable as possible. Elopak, one of the leading suppliers of carton packaging and filling machines, has transferred the advantages of the liquid carton in terms of functionality and sustainability to the detergents and cleaning agents segment. Here, the D-PAKâ„¢ carton is a low-plastic solution that offers high functionality and user-friendliness. It not only protects products but is also practical to use and predominantly made from renewable raw materials. Consumer tests show that the D-PAK â„¢ carton offers clear advantages over the primarily used plastic pouches in terms of sustainability and handling. Consumers’ willingness to buy liquid non-food products in carton packaging is correspondingly high, especially in the refill packaging segment. As the demand for D-PAKâ„¢ cartons is increasing, Elopak established its own business unit for non-food solutions at the beginning of 2024 and now offers a broad product portfolio for numerous applications. Note de contenu : - Multi-talented packaging - Plastic in abundance - Manufacturers must act - Rebirth of a revolutionary concept - Growing segment - Study shows refill potential Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41210 [article]

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Synergistically enhancing hydrogen bonding, hydrophobic interaction and electrostatic association of collagen fiber to flavonoid aglycones for their effective separation by polyethyleneimine modification / Qixian Zhang in COLLAGEN AND LEATHER, Vol. 5 (2023)  

[article]  inCOLLAGEN AND LEATHER > Vol. 5 (2023) . - 12 p. Titre : Synergistically enhancing hydrogen bonding, hydrophobic interaction and electrostatic association of collagen fiber to flavonoid aglycones for their effective separation by polyethyleneimine modification Type de document : texte imprimé Auteurs : Qixian Zhang, Auteur ; Rui Wang, Auteur ; Bi Shi, Auteur Année de publication : 2023 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène Flavonoïdes Matériaux d'emballage Polyéther imide Polyéthylèneimine Index. décimale : 688.8 Technologie des emballages Résumé : Compared with flavonoid glycosides, flavonoid aglycones are difficult to be separated since they have less hydroxyls. Collagen fiber (CF), a natural polymer, was once used as packing material for separation of kaempferol and quercetin (the typical flavonoid aglycones) after crosslinking by glutaraldehyde mainly based on hydrogen bonding and hydrophobic interaction in column length-diameter ratio of 60:1. Hydrophobic modification by grafting alkyl chains was then employed to enhance the hydrophobic interaction between CF and flavonoid aglycones, which can improve the separation efficiency and decrease column length-diameter ratio to 19:1. In order to further improve the adsorption capacity and separation efficiency, the strategy of simultaneously grafting hydrophobic alkyl chains (–CH2–CH2–) and alkali groups (–NH2) was adopted in this work to enhance hydrophobic interaction, hydrogen bonding and electrostatic association to flavonoid aglycones at the same time through grafting polyethyleneimine (PEI). PEI modified CF (PEI-CF) maintained the fiber structure of CF, and had higher adsorption extent and rate to flavonoid aglycones through the enhanced synergetic effect of hydrophobic interaction, hydrogen bonding and electrostatic association. As a result, PEI-CF presented a satisfactory column separation efficiency for kaempferol and quercetin even the length-diameter ratio of column was decreased to 11:1, which was much better than previously developed glutaradehyde-crosslinked collagen fiber and isobutyl-grafted collagen fiber, as well as commonly used polyamide and Sephadex LH-20. Note de contenu : - Materials - Preparation of PEI-CF - Characterization of PEI-CF - Static adsorption - Adsorption mechanism - Dynamic adsorption and desorption - Column chromatographic separation DOI : https://doi.org/10.1186/s42825-023-00138-2 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-023-00138-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40076 [article]

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