Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance / Ren Longfang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 12 p. Titre : Amphiphilic hyperbranched polymers : synthesis, characterization and self-assembly performance Type de document : texte imprimé Auteurs : Ren Longfang, Auteur ; Qiaoxuan Niu, Auteur ; Jing Zhao, Auteur ; Taotao Qiang, Auteur Année de publication : 2020 Article en page(s) : 12 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Composés amphiphiles Encapsulation Polymères -- Synthèse Polymères amphiphiles Systèmes auto-assemblés Index. décimale : 668.9 Polymères Résumé : A series of amphiphilic hyperbranched polymers (AHP-s, the “s” refers to the algebra of AHP) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP-s, the “s” refers to the algebra of HBP) and palmitoyl chloride. FTIR, NMR and GPC were used to determine the structure of AHP-s, the results showed that AHP-s exhibits core-shell structure. The thermal properties of polymers were investigated by DSC and TGA. It was found that AHP-2, AHP-3 and AHP-4 display higher thermal stability than AHP-1 (AHP-1, AHP-2, AHP-3 and AHP-4 represent the first, second, third and fourth generation AHP, respectively). Furthermore, the self-assembly performance of AHP-s in THF solvent was investigated by TEM and SEM. Finally, the encapsulation capacity of the AHP-s for methyl orange (MO) was explored at different concentrations of AHP-s and pH conditions. It was found that AHP-s is capable of accommodating hydrophilic guest MO. Moreover, the higher generation of AHP-s, the stronger encapsulation capacity obtained. And the encapsulation capacity closely associated with the pH of encapsulation system. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of amphiphilic hyperbranched polymers (AHP-s) - Characterization - Self-assembly experimental method in THF - Methodology for dye extraction phase transfer processes - Phase transfer experiment under different pH - RESULTS AND DISCUSSION : Characterization of amphiphilic hyperbranched polymers - Thermal properties of amphiphilic hyperbranched polymers - Self-assembly of amphiphilic hyperbranched polymers in THF - Phase transfer mechanism - Phase transfer mechanism under different pH DOI : https://doi.org/10.1186/s42825-019-0015-7 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0015-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37328 [article]

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Amphiphilically modified self-stratified siloxane-glycidyl carbamate coatings for anti-icing applications / AliReza Rahimi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 83-97 Titre : Amphiphilically modified self-stratified siloxane-glycidyl carbamate coatings for anti-icing applications Type de document : texte imprimé Auteurs : AliReza Rahimi, Auteur ; Morgan Murphy, Auteur ; Vinod Upadhyay, Auteur ; Kinza Faiyaz, Auteur ; Dante Battocchi, Auteur ; Dean C. Webster, Auteur Année de publication : 2021 Article en page(s) : p. 83-97 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Carbamate de glycidyle Epoxydes Polydiméthylsiloxane Le 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. Polyéthylène glycol Polymères amphiphiles Polyuréthanes Revêtements antigel Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Icephobic coatings have applications in many industries to protect surfaces from deterioration and avoid catastrophic incidents. In this work, we report a new strategy to prepare amphiphilic siloxane-glycidyl carbamate coatings (AmpSiGC) coatings with anti-icing property. Polydimethyl siloxane (PDMS) and poly(ethylene glycol) (PEG) provided amphiphilicity for the AmpSiGC coatings. The designed experiment considered several factors: molecular weight of the surface-modifying polymers and their amount in the coating system. Although amphiphilic coatings have demonstrated promising results as marine coatings, investigations on their icephobic applications have been limited. This work discusses three aspects of the developed AmpSiGC systems: (1) preparation of the incorporated ingredients and their characterization by Fourier transform infrared spectroscopy (FTIR); (2) surface characterization of coatings via ATR (attenuated total reflectance)-FTIR, X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM); and (3) ice-adhesion, electrochemical impedance spectroscopy (EIS), and mechanical property evaluations. Overall, the surface analysis indicated the presence of both hydrophobic and hydrophilic domains and most of the coatings demonstrated promising performance for anti-icing applications with desirable barrier and mechanical properties in comparison to controls. Note de contenu : - EXPERIMENTAL : Design of experiments - Materials - Synthesis of glycidyl carbamate resin - Epoxy equivalent weight titrations - Percent solids determination - Fourier transform infrared spectroscopy - Coating formulaton & curing - Icephobic characterization - Statistical analysis - Surface characterization - Water absorption and barrier performance - Mechanical tests - RESULTS AND DISCUSSION : GC resin and prepolymers - Contact angle - Ice adhesion - XPS - ATR-FTIR - AFM images - Water absorption and barrier properties - Mechanical properties - Table 1 : Coating compositions - Table 2 : Epoxy equivalent weight for GC resin and some prepolymers DOI : https://doi.org/10.1007/s11998-020-00402-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00402-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35353 [article]

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Antifouling improvement of a polyacrylonitrile membrane blended with an amphiphilic copolymer in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 1 (2022)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 1 (2022) . - p. 93-105 Titre : Antifouling improvement of a polyacrylonitrile membrane blended with an amphiphilic copolymer Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 93-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adhésion Caractérisation Copolymère acrylonitrile-co-polyhydroxyéthyl méthacrylate Copolymères Hydrophilie Matériaux -- Propriétés antisalissures Membranes (technologie) Perméation Polyacrylonitrile Polymères amphiphiles Taille des pores Index. décimale : 668.4 Plastiques, vinyles Résumé : The amphiphilic copolymer polyacrylonitrile-co-poly(hydroxyethyl methacrylate) (PAN-co-PHEMA) was readily blended with polyacrylonitrile (PAN) to fabricate a flat-sheet blending membrane through non-solvent induced phase separation (NIPS). In the membrane-forming process, the hydrophilic PHEMA chains are uniformly distributed on the surface, as revealed by the energy-dispersive X-ray tests. The sponge-like sub-layer embedded with droplet-shaped structures is formed at the cross-sections of membranes, because of the high viscosity of the casting solution. With the increase of copolymer concentration, the mean pore size of the blending membranes increases from 26.9 to 99.8 nm, leading to the increase of membrane flux from 93.6 to 205.4 l/(m2h). The incorporation of PAN-co-PHEMA copolymer endows the blending membrane with a rough surface microstructure and enhanced hydrophilicity. The rejection ratio of membranes for emulsified pump oil reaches 99.9%, indicating a prominent separation performance. In the cycle permeation experiments, the flux recovery ratio of the blending membranes is as high as 99.6%, which is much higher than those of PAN membrane. The irreversible fouling of blending membranes induced by oil adsorption is alleviated, and converted into reversible fouling, owing to the reduction of the adhesion force between foulant and membrane surface. These results suggest that the anti-fouling property of PAN membranes has been dramatically strengthened via the addition of PAN-co-PHEMA copolymer. Note de contenu : - EXPERIMENTAL : Materials - Membrane preparation - Membrane characterization - Permation experiments - RESULTS AND DISCUSSION : Chemical structure and composition of the blending membranes - Morphology of the membranes - Hydrophilicity of the membranes - Adhesion force between foulant and membrane surface - Permeation and antifouling properties - Table 1 : Compositions and viscosities of casting solutions - Table 2 : Elemental concentration of the membrane surfaces - Table 3 : Mean roughness parameter (Ra) and mean pore size (dm) of the membranes DOI : https://doi.org/10.1515/ipp-2021-4175 En ligne : https://drive.google.com/file/d/1gHIUnshbRcjPcKdHhmL5HqHm_wBDgAWG/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38444 [article]

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Application of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXII, N° 11 (11/2017)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXII, N° 11 (11/2017) . - p. 367-376 Titre : Application of Y-shaped polyurethane and polyacrylic acid as a complex retanning agent in aldehyde-tanned goat leather Type de document : texte imprimé Auteurs : Shuangquan Lai, Auteur ; Yong Jin, Auteur ; Hanping Li, Auteur ; Lei Zhang, Auteur ; Xin Yin, Auteur Année de publication : 2017 Article en page(s) : p. 367-376 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique Copolymères -- Synthèse Copolymères séquencés Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Cuirs et peaux -- Propriétés physiques Cuirs et peaux de chèvres Glutaraldéhyde Morphologie (matériaux) Polymères amphiphiles Polyuréthanes Retannage Tannage organique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A kind of Y-shaped amphiphilic block polyurethane copolymers (PUGs) with different molecular weights were successfully synthesized to be used as retanning agent combined with polyacrylic acid (PAA) for modified glutaraldehyde tanned goatskin. The structures of resulting products were characterized by FTIR, and the molecular weights of products were measured with GPC. The application performances were investigated by measuring the organoleptic and physical mechanical properties of resulting leathers according to the alone or combined use of PUG and PAA, the molecular weight of PUG, and the offer percentage of retanning agent. The best performance was found in the leather retanned by PUG750 and PAA complex retanning agent at the total offer percentage of 4 wt%. Finally, the free formaldehyde contents in the leathers retanned with 4 wt% PUG750 and PAA at different pH conditions were analyzed with acetyl acetone colorimetric method. The mechanical properties as well as the fibers morphologies of the experimental and control groups were also investigated. The results demonstrated that when the pH value at the later stage of retanning process was controlled at 4.0 or 3.0, the free formaldehyde content was significantly reduced by 20.3% or 38% respectively ; and the physical mechanical properties of leathers were also very excellent to meet the performance requirements of goatskin garment leathers. According to these results, the method for using PUG and PAA as a complex retanning agent might be a good choice in chrome-free tanning process. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of Y-shaped amphiphilic block polyurethane copolymers (PUGs) - Synthesis of polyacrylic acid (PAA) - Fourier Transform Infrared Spectra (FTIR) - Gel permeation chromatography (GPC) - Application of polyurethanes and polyacrylic acid - Analysis of leather properties - Scanning electron microscopy analysis - Determination of free formaldehyde contents in leathers - RESULTS AND DISCUSSION : Synthesis of polyurethane copolymers and polyacrylic acid - Effect of different retanning agents on the organoleptic and physical properties of leathers - Effect of the molecular weight of PUG on the organoleptic and physical properties of leathers - Effect of the amount of complex retanning agent on the organoleptic and physical properties of leathers - Application of the complex retanning agent under different pH conditions En ligne : https://drive.google.com/file/d/1n0hhgDSLoOspbiCVezGLJhDkXewQevzZ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29395 [article]

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Boltorn W3000 / Göran Ziegler in PAINTINDIA, Vol. LVII, N° 3 (03/2007)

[article]  inPAINTINDIA > Vol. LVII, N° 3 (03/2007) . - p. 117-124 Titre : Boltorn W3000 : An amphiphilic dendritic polymer for alkyd emulsions Type de document : texte imprimé Auteurs : Göran Ziegler, Auteur ; Bo Häggman, Auteur Année de publication : 2007 Article en page(s) : p. 117-124 Langues : Anglais (eng) Catégories : Polyalkydes Polymères amphiphiles Polymères dendritiques Polymères en émulsion Revêtements en phase aqueuse:Peinture en phase aqueuse Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, we present a non-ionic, self-emulsifying cross linkable dendritic polymer used to disperse conventional alkyd resins (originally prepared to be solvent-borne) in water. The emulsions are obtained through the EIP (emulsion inversion point) method. The emulsions are typically characterized by good shelf life stability and have been made at solids content of about 50% with a viscosity of 50-150 mPa*s. Examples of paint formulations are given. Effects of using Boltorn W3000 • Boltorn W3000 blends well with conventional alkyds and allows the making of alkyd emulsions with low amounts of external surfactant. • Paint made on emulsions made with Boltorn W3000 has fast drying • Paint made on emulsions made with Boltorn W3000 has good chemical resistance. Note de contenu : - Boltorn W3000 - Alkyd resin - The waterborne alkyds systems - Emulsification procedure - Optimising conditions - Amount of Boltorn W3000 - Co-solvent content - Resin temperature - Emulsification results - Atomic force microscopy Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11470 [article]

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Les carbopol smart polymers se font mousser in ADDIACTIVE, N° 106 (01-02-03/2018)

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Development of nanocomposites with self-cleaning properties for textile and leather / Concepcio Casas in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 102, N° 1 (01-02/2018)  

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Encapsulation de molécules hydrophobes par des polyélectrolytes amphiphiles : relation structure-propriétés / C. Locatelli-Champagne in RHEOLOGIE, Vol. 22 (12/2012)

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Glycochimie : des polymères à la biocatalyse / Laurent Legentil in L'ACTUALITE CHIMIQUE, N° 450 (04/2020)  

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Improving sunscreen performance / Thomas G. O'Lenick in PERSONAL CARE EUROPE, Vol. 5, N° 2 (04/2012)  

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Influence of hydrophobic side chain structure on the performance of amphiphilic acrylate copolymers in leather making / Jinxia Du in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 2 (03-04/2016)  

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Influence of modified graphene oxide on the antifouling performance of waterborne polyurethane coatings containing amphiphilic honeycomb surface / Xu Zhao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

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Intelligent polymeric surfaces through molecular self-assembly / Achin Goel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 6, N° 1 (03/2009)  

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Introduction to soft matter. Polymers, colloids, amphiphiles and liquid crystals / Ian W. Hammley / New York [Etats-Unis] : John Wiley & Sons (2000)

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Investigations in the stranski-laboratorium of the TU Berlin – physical chemistry of colloidal systems – going towards complexity and functionality / Burcu Altin in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 3 (04-05/2012)

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Physico-chimie des composés amphiphiles / Roger Perron / Paris : CNRS Editions (1979)

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Poly(ethylene) glycol-modified, amphiphilic, siloxane–polyurethane coatings and their performance as fouling-release surfaces / Teluka P. Galhenage in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)  

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Polymères amphiphiles / Ilias Iliopoulos in ACTUALITES G.F.P., N° 80 (06/1998)

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Polymères associatifs d'origine naturelle : mécanismes d'association et rôle de la structure moléculaire / J. Desbrières in LES CAHIERS DE RHEOLOGIE, Vol. XVI, N° 3 (10/1999)

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Polymères et CO2 supercritique / Patrick Lacroix-Desmazes in L'ACTUALITE CHIMIQUE, N° 422-423 (10-11/2017)

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