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Synthesis and application of an amphoteric acrylic polyelectryte as a retanning agent / Jin Liqiang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 3 (05-06/2004)
[article]
Titre : Synthesis and application of an amphoteric acrylic polyelectryte as a retanning agent Type de document : texte imprimé Auteurs : Jin Liqiang, Auteur ; Liu Zonglin, Auteur ; Xu Qinghua, Auteur ; Li Yanchun, Auteur Année de publication : 2004 Article en page(s) : p. 105-109 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage
Composés amphotériques
Copolymères -- Synthèse
Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux de porcs
Formulation (Génie chimique)
Polyacryliques
Polyélectrolytes
Retannage
Tannage au chromeIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : An amphoteric acrylic copolymer of acrylic acid(AA) and methylacrylethyltrimethylammonium chloride (DMC) has been synthesized by free radical copolymerization using ammonium persulfate as the catalyst at 75°C for 4hrs.The structure of the polyelectrolyte has been characterized by FTIR and 13C NMR.The solution properties of the polymer have also been studied. The correlation between the comonomer ratio of the amphoteric polyelectrolyte and its application properties as a retanning material has been investigated by measuring such physical/ mechanical indexes of the retanned leather as thickness increment ratio, shrinkage temperature, tensile strength, unit load elongation and also by instrumental analysis such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and colour analysis. It has been found that the amphoteric polymer tanning agent has a strong retanning ability and has no negative effect on the dyeing of the retanned leather under proper conditions. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Preparation of the copolymer
- STRUCTURE DETERMINATION OF THE COPOLYMER
- SOLUTION PROPERTIES
- RETANNAGE APPLICATION : Determination of leather properties
- RESULTS AND DISCUSSION : Synthesis of copolymer
- SOLUBILITY OF THE COPOLYMER
- APPLICATION RESULTS
- Table 1 : The reaction conditions and results for preparing the AR series of retannages
- Table 2 : Retanning formulation of blue pigskin garment leather
- Table 3 : Physical and mechanical propertis of chromed leather retanned by AR series copolymerEn ligne : https://drive.google.com/file/d/1I9awenD9B3UvyzDc5202rtW_IRoiiwyN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39636
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 3 (05-06/2004) . - p. 105-109[article]The fast deposition of antireflection coating / Shing-Dar Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)
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Titre : The fast deposition of antireflection coating Type de document : texte imprimé Auteurs : Shing-Dar Wang, Auteur ; Meng-Chi Li, Auteur ; Yen-Cheng Peng, Auteur ; Cheng-Chung Lee, Auteur Année de publication : 2017 Article en page(s) : p. 1169-1182 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anti-réflectance
Champs électriques
Polyélectrolytes
Revêtements
VerreIndex. décimale : 667.9 Revêtements et enduits Résumé : In this investigation, the effect of deposition time (5, 60, or 300 s) on a double-sided antireflection (AR) coating done by layer-by-layer deposition of polyelectrolyte was determined. The different structures and transmittance of an AR coating induced by electric-field-assisted layer-by-layer deposition (ELBLD) (with voltage of 0.5, 5, 50, or 500 V) and normal deposition (with voltage of 0 V) were compared. The electric field was perpendicular to the glass surface. After 5.5 bilayers of PAH/PAA were fabricated, the film was exposed to an acidic treatment of HCl solution (pH 2.4) for 65 s, followed by a brief rinse (~15 s) in deionized water, blown dry with air, and heat treated at 220°C for 2 h. Regardless of whether the electric field was applied, the average transmittance of visible light of the AR coating was more than 96% except for the reduced transmittance because of the excessive deposition of polyelectrolyte at an applied voltage of 500 V and a deposition time of 300 s. Average transmittance of 97.68 ± 0.31% was obtained at normal deposition of 5.5 bilayers with deposition time of 60 s. The polyelectrolytes had a propensity to form larger particles or accumulate into bundles under ELBLD, which was detrimental to the transmittance of an AR coating. Therefore, at the same deposition time, transmittance values of ELBLD samples were slightly lower than those of normal deposition. In other words, in the overall performance, the AR films of normal deposition are superior to those of ELBLD. The blowing pressure applied to dry the coating had significant impact on the quality of the film. Note de contenu : - Transmittance values of visible light
- AFM analysis
- SEM analysis
- Thickness and refractive index of the AR coating
- The effect of blowing pressure on transmittance of AR coating
- Comparison between normal deposition and ELBLDDOI : 10.1007/s11998-016-9909-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9909-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29151
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 5 (09/2017) . - p. 1169-1182[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19230 - Périodique Bibliothèque principale Documentaires Disponible Undertanding thickening stabilising polymers / Alicia Roso in PERSONAL CARE EUROPE, Vol. 3, N° 3 (09/2010)
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Titre : Undertanding thickening stabilising polymers Type de document : texte imprimé Auteurs : Alicia Roso, Auteur ; Emmanuelle Merat, Auteur ; Olivier Braun, Auteur ; Stéphanie Garcel, Auteur Année de publication : 2010 Article en page(s) : p. 60-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Emulsifiants
Emulsions -- Emploi en cosmétologie
Emulsions -- Stabilité
Epaississants
Polyélectrolytes
Polymères -- Structure
Résistance au rayonnement ultraviolet
Stabilisants (chimie)Index. décimale : 541.34 Solutions Résumé : In today's competitive cometic market one of the main challenges is to speed up product development while maintaining a high quality of work and adhering to the constantly changing regulations. One way to anticipate the results and allow a quicker development time is to take advantage of previous experience and develop a better knowledge of the structure-activity connections. From this perspective, the aim of this study is to investigate the correlations. Froms this perspective, the aim of this study is to investigate the correlations between molecular structure of thickening polymers and their final properties in formulations : thickening effect in different pH situations, resistance to UV exposure, and other benefits such as emulsifying-stabilising capacity of oils, texture and sensory profile. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10367
in PERSONAL CARE EUROPE > Vol. 3, N° 3 (09/2010) . - p. 60-63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012509 - Périodique Bibliothèque principale Documentaires Disponible Vers une compréhension de la croissance et de la structure des films multicouches de polyélectrolytes / David Pointu in ACTUALITES G.F.P., N° 85 (03/2000)
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Titre : Vers une compréhension de la croissance et de la structure des films multicouches de polyélectrolytes Type de document : texte imprimé Auteurs : David Pointu, Auteur ; Gero Decher, Auteur Année de publication : 2000 Article en page(s) : p. 3-9 Note générale : Bibliogr. Langues : Français (fre) Catégories : Couches minces multicouches
PolyélectrolytesIndex. décimale : 668.9 Polymères Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=6536
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Code-barres Cote Support Localisation Section Disponibilité 001877 - Périodique Bibliothèque principale Documentaires Disponible 001878 - Périodique Bibliothèque principale Documentaires Disponible