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Preparation and characterization of cationic waterborne polyurethanes containing a star-branched polydimethylsiloxane / Xiaoling He in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
[article]
Titre : Preparation and characterization of cationic waterborne polyurethanes containing a star-branched polydimethylsiloxane Type de document : texte imprimé Auteurs : Xiaoling He, Auteur ; Jingwei He, Auteur ; Yangkun Sun, Auteur ; Xiaopei Zhou, Auteur ; Jingying Zhang, Auteur ; Fang Liu, Auteur Année de publication : 2022 Article en page(s) : p. 1055-1066 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Dépôt électrolytique
PolydiméthylsiloxaneLe 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.
Polymères -- Propriétés mécaniques
Polymères -- Synthèse
Polymères cationiques
Polymères en émulsion
Polymères ramifiés
Polyuréthanes
Résistance à l'humidité:Résistance à l'eau
Revêtements en phase aqueuse
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Cationic waterborne polyurethanes (CWPUs) bring in hydrophilic component to molecular chain, which inevitably deteriorates its water-resistant ability. Here, we synthesized a series of branched chain cationic waterborne polyurethanes (i.e., CWPUs-Si) that had been modified using a novel star-branched polydimethylsiloxane (SB-PDMS) to improve their water-resistant performance. The effects of SB-PDMS content on the properties of the CWPUs-Si polymers (e.g., crystallinity, emulsion stability, mechanical performance, surface element enrichment, surface topography, water resistance), together with the performance of coatings prepared by cathodic electrodeposition, were determined. The results showed that the introduction of SB-PDMS increased phase separation and surface roughness induced by hydrogen bonding while the surface energy decreased, both of which improved water resistance. The polymers showed improved rigidity due to increased content of the hard segments and enhanced physical crosslinking. Except for an increase in pencil hardness, SB-PDMS had no effect on the films prepared by cathodic electrodeposition. The results from this study may provide a strategy to improve the water-resistant properties of CWPUs. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of CWPUs-Si - Preparation of CWPUs-Si cast films and CED coatings - Characterization
- RESULTS AND DISCUSSION : Synthesis and characterization of CWPUs-Si - Emulsion properties of the CWPUs-Si polymers - Surface element analysis of CWPUs-Si - Surface topography of CWPUs-Si - Water resistance of CWPUs-Si - Mechanical properties of CWPUs-Si - Properties of CED coatings prepared from the CWPUs-Si polymers
- Table 1 : The composition design of CWPUs-Si
- Table 2 : Table 2 Emulsion properties of CWPUs-Si polymers
- Table 3 : Atomic mass contents of CWPUs-Si polymersDOI : https://doi.org/10.1007/s11998-021-00584-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00584-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38035
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 4 (07/2022) . - p. 1055-1066[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23574 - Périodique Bibliothèque principale Documentaires Disponible Preparation and properties of antibacterial styrene-acrylic emulsion containing thiazole structure and its application as coating / Xiaopei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
[article]
Titre : Preparation and properties of antibacterial styrene-acrylic emulsion containing thiazole structure and its application as coating Type de document : texte imprimé Auteurs : Xiaopei Zhou, Auteur ; Fang Liu, Auteur ; Shaobo Xiong, Auteur ; Furong Zhou, Auteur ; Hui Xiang, Auteur ; Jingwei He, Auteur Année de publication : 2022 Article en page(s) : p. 1365-1379 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Copolymère styrène acrylique
Polymérisation en émulsion
Revêtements en phase aqueuse -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of antibacterial styrene-acrylic emulsions (SA-Mn, n = 5, 10, 15, 20) with different contents of 5-(methacryloxy-2-ethoxyaminocarbonyl)methyl-thiazole (MEMT) were successfully synthesized, and SA-M20 was used to prepare a water-based antibacterial coating (PSA-M20). The structures of the films (SA-Mn-F) obtained from SA-Mn were analyzed by Fourier-transform infrared spectrometry using the attenuated total reflectance model (FTIR-ATR). The effects of the MEMT content on the properties of the emulsions and related films were investigated in the aspects of particle size, thermal stability, pencil hardness, adhesive force grade, water resistance, and surface morphology. The results showed that all the emulsions or related films had acceptable properties. The antibacterial and antibacterial durability tests showed that films obtained from emulsions SA-M15, SA-M20, and the coating PSA-M20 had strong and durable antibacterial activity against E. coli and S. aureus. Note de contenu : - EXPERIMENTAL : Materials - Preparation of antibacterial styrene-acrylic emulsion (SA-Mn) - Preparation of antibacterial water-based coating (PSA-M20) - Preparation of films of SA-Mn emulsion (SA-Mn-F), PSA-M20 coating (PSA-M20-F), and PSA-M0 coating (PSA-M0-F) - Characterizations
- RESULTS AND DISCUSSION : The ATR-FTIR spectra of SA-Mn-Fs -
Properties of SA-Mn emulsions - Properties of SA-Mn-F - Thermal properties of St-BA-AA-MEMT copolymers - Surface morphology of SA-Mn-Fs - Properties of antibacterial water-based coating PSA-M20 - Antibacterial activities of SA-Mn-F, PSA-M20-F and PSA-M0-F - Antibacterial durability of SA-Mn-Fs, PSA-M20-F, and PSA-M0-F
- Table 1 : Chemical compositions of synthesized antibacterial styrene-acrylic emulsions with 5-(methacryloxy-2-ethoxyaminocarbonyl)-methyl-thiazole (MEMT) (SA-Mn)
- Table 2 : Properties of SA-Mn emulsion (n = 0, 5, 10, 15, 20)
- Table 3 : Properties of SA-Mn-Fs (n = 0, 5, 10, 15, 20)
- Table 4 : Characteristic temperatures of thermal decomposition and the glass transition temperature (Tg) of St-BA-AA-MEMT copolymers with different content of MEMT
- Table 5 : Properties of antibacterial water-based coating PSA-M20
- Table 6 : The results of antibacterial rates of films (SA-Mn-F, PSA-M20-F, PSA-M0-F) against E. coli and S. aureus
- Table 7 : Antibacterial rates of films (SA-M0-F, SA-M15-F, SA-M20-F, PSA-M20-F, PSA-M0-F) after being irradiated by a 253.7-nm UV light for 100 h against E. coli and S. aureus
- Table 8 : Antibacterial rate of films (SA-M0-F, SA-M15-F, SA-M20-F, PSA-M20-F, PSA-M0-F) after being immersed in water for 7 days against E. coli and S. aureusDOI : https://doi.org/10.1007/s11998-022-00589-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00589-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38276
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1365-1379[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23672 - Périodique Bibliothèque principale Documentaires Disponible