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Cross-linked polymers for aqueous finishing. Binders cross-linked polyaziridine. Part 2 : Behaviour of acrylic binders in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 4 (07-08/2008)
[article]
Titre : Cross-linked polymers for aqueous finishing. Binders cross-linked polyaziridine. Part 2 : Behaviour of acrylic binders Type de document : texte imprimé Année de publication : 2008 Article en page(s) : p. 157-161 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Formulation (Génie chimique)
Liants en phase aqueuse
Polyacryliques
Polyaziridine
Résistance à l'abrasion
Réticulants en phase aqueuse
Revêtements organiquesIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Due to the current stringent regulations regarding emissions into the environment, coating recipes commonly used in leather finishing comprise water-based products. However, in order to obtain the physical properties required for most leather goods, the use of reactive cross-linkers is needed.
The present study aims to look into the behaviour of acrylic binders cross-linked with polyaziridine: the amount of cross-linker used, the type of polymer employed, the type of tannage and retannage and the evolution of the reaction over time.
A comparison of results shows that the type of tannage and retannage, as well as the physical characteristics of the acrylic binder used are influential factors in the behaviour of acrylic binders cross-linked with polyaziridine.
Different amounts of polyaziridine are needed with regard to the type of tannage and retannage and to the physical characteristics of the acrylic binder used.Note de contenu : - Table 1 : Monomers most commonly employed to produce acrylic binders
- Table 2 : Physical characteristics of the acrylic binders
- Table 3 : Coating formulation
- Table 4 : Results of colour fastness to dry rubbing
- Table 5 : Results of colour fastness to wet rubbingEn ligne : https://drive.google.com/file/d/1gufiXdrRy3Nc5oX3nOQqyu49tee1kRdZ/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38964
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 4 (07-08/2008) . - p. 157-161[article]Cross-linked polymers for aqueous finishing. Binders crosslinked with polyaziridin. Part. 1 : Behaviour of polyurethane in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 3 (05-06/2008)
[article]
Titre : Cross-linked polymers for aqueous finishing. Binders crosslinked with polyaziridin. Part. 1 : Behaviour of polyurethane Type de document : texte imprimé Année de publication : 2008 Article en page(s) : p. 96-102 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition
Formulation (Génie chimique)
Liants en phase aqueuse
Polyaziridine
Polyuréthanes
Résistance à l'abrasion
Réticulants
Revêtements en phase aqueuse
Revêtements organiques
Solidité de la couleurIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Aqueous finishing emerges as an alternative to solvent based finishes, which have to be limited due to their toxicity, negative effects on the environment and in terms of safety. It is necessary, in order to be able to introduce aqueous systems progressively, to use cross-linkers that react with polymers. Otherwise, it is not possible to obtain the physical properties required for most leather goods. The present study aims to look into the behaviour of polyurethane binders cross-linked with polyaziridine : the amount of cross-linker used, the type of polymer employed, the type of tannage and retannage effected and the evolution of the reaction over time.
A comparison of results shows that the type of tannage and retannage, as well as the physical characteristics of the polyurethane used are influential factors in the behaviour of polyurethane binders cross-linked with polyaziridine. Different amounts of polyaziridine are needed with regard to the type of tannage and retannage effected and to the physical characteristics of the polyurethane used.Note de contenu :
- Chemical products
- Methodology
- Table 1 : Physical characteristics of the polyurethane binders
- Table 2 : Coating formulation
- Table 3 : Results of colour fastness to dry rubbing
- Table 4 : Results of colour fastness to wet rubbingEn ligne : https://drive.google.com/file/d/1RXtnSVbt5AcIo_FcnmplkihJ5LMM34iP/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38953
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 3 (05-06/2008) . - p. 96-102[article]Highly stable and fast-dissolving ascorbic acid-loaded microneedles / Jeerapond Leelawattanachai in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 5 (10/2023)
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Titre : Highly stable and fast-dissolving ascorbic acid-loaded microneedles Type de document : texte imprimé Auteurs : Jeerapond Leelawattanachai, Auteur ; Kedsara Panyasu, Auteur ; Kornkanok Prasertsom, Auteur ; Supone Manakasettharn, Auteur ; Hathaiphat Duangdaw, Auteur ; Pitchaon Budthong, Auteur ; Naranya Thepphornbanchakit, Auteur ; Kullachate Muangnapoh, Auteur ; Sira Srinives, Auteur ; Dujduan Waraho-Zhmayev, Auteur ; Darapond Triampo, Auteur Année de publication : 2023 Article en page(s) : p. 612-626 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Dissolution (chimie)
Formulation (génie chimique) -- Stabilité
Micro-aiguilles
Pénétration cutanée
Polyaziridine
Systèmes de livraison (pharmacie)
Tests de sécurité
Vectorisation
Vitamine CIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objectives : Ascorbic acid has many benefits to the skin. Numerous attempts to promote its topical delivery show great challenges since its chemical instability and poor skin impermeability. Microneedle delivery is a simple, safe, painless and effective means to deliver therapeutic or nourishing molecules into the skin. The purpose of this study was twofold : (a) to develop a new formulation of ascorbic acid-loaded microneedles to enhance ascorbic acid stability by investigating an optimal amount of polyethyleneimine as an additive to the dextran-based microneedle formulation and (b) to assess microneedle properties in terms of dissolving rate, skin penetration ability, biocompatibility and antimicrobial activity.
- Methods : The microneedles formulated with ascorbic acid and varied polyethyleneimine concentrations were fabricated and subsequently tested for ascorbic acid stability using 2,2-diphenyl-1-picrylhydrazyl assay. The dissolution rate and skin penetration depth were investigated in porcine skin and the reconstructed human full-thickness skin model respectively. The skin irritation tests were done according to the Organisation for Economic Co-operation and Development Test Guideline No. 439. An antimicrobial disc susceptibility test was performed against Escherichia coli, Staphylococcus aureus and Staphylococcus epidermidis.
- Results : Among varied amounts of 0%, 1.5%, 3.0% and 4.5% (w/v), the 3.0% polyethyleneimine showed the most desirable characteristics, including well-preserved shape integrity after demoulding, significantly improved stability of ascorbic acid (p < 0.001) from 33% to 96% antioxidant activity after 8 weeks of storage at 40°C, increased dissolving rate (p < 0.001) by being completely dissolved within 2 min after the skin insertion, passing skin penetration and biocompatibility tests as well as having a broad spectrum of antimicrobial property.
- Conclusion : With a safety profile and enhanced properties, the new formulation of ascorbic acid-loaded microneedles shows outstanding potential as commercially available cosmetics and healthcare products.Note de contenu : - MATERIALS AND METHODS : Materials - Fabrication and characterization of AA-loaded dissolving microneedles - Stability test of AA-loaded microneedle after storage at various conditions - Fourier-transform infrared spectroscopy (FTIR) - Dissolution test of AA-loaded microneedles - In vitro skin permeation experiment with AA - Skin penetration experiment - Antimicrobial disc susceptibility test - Skin irritation test of AA-loaded microneedles - Statistical analysis
- RESULTS AND DISCUSSION : Fabrication and characterization of AA-loaded microneedles - Stability test of AA-loaded microneedle after storage at various conditions - Dissolution test of AA-loaded microneedles - In vitro skin permeation experiment with AA - Skin penetration experiment - Antimicrobial disc susceptibility test - Skin irritation test of AA-loaded microneedlesDOI : https://doi.org/10.1111/ics.12865 En ligne : https://drive.google.com/file/d/1A7uzPuS6f_fW_vYCVoxz74idDbVfUPQO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40088
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 5 (10/2023) . - p. 612-626[article]Improvement of the separation and antibiological fouling performance using layer-by-layer self-assembled nanofiltration membranes / Caihua Xiong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
[article]
Titre : Improvement of the separation and antibiological fouling performance using layer-by-layer self-assembled nanofiltration membranes Type de document : texte imprimé Auteurs : Caihua Xiong, Auteur ; Zhonghua Huang, Auteur ; Zhiyu Ouyang, Auteur ; Mengdi Tang, Auteur ; Xiaolu Lin, Auteur ; Zhen Zhang, Auteur Année de publication : 2020 Article en page(s) : p. 731–746 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argent
Caractérisation
Membranes (technologie)
Nanofiltration
Nanoparticules
Polyaziridine
Revêtements antisalissures
Séparation (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : A novel surface-modified nanofiltration (NF) membrane was prepared by layer-by-layer (LbL) self-assembly of positively charged polyethylenimine (PEI) and glutaraldehyde (GA) and negatively charged carboxymethyl chitosan (NO-CMC) alternately on the polyethersulfone (PES) membrane surfaces. The alteration aimed at improving the membrane separation performance, which was investigated in the study. In order to enhance antibiological fouling performance of the NF membrane, the silver nanoparticles (AgNPs) were coated on the modified membrane in two different modes. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), zeta potential measurement, and water contact angle measurements were employed to characterize the formed membrane surface chemical composition and morphology. The rejection of different single nonheavy metal salts, yielded from the modified membrane, followed the order of MgCl2 > MgSO4 > CaCl2 > Na2CO3 > NaCl > Na2SO4. Additionally, the rejection of single heavy metal salts Cr3+, Cu2+, Cd2+, Ni2+ was 88.95%, 84.04%, 82.69% and 83.47%, respectively, whereas the rejection of Cr3+, Cu2+, Cd2+, Ni2+ increased to 91.77%, 90.70%, 89.74% and 87.22%, respectively, in the mixed salt solution. Moreover, the rejection of Cu2+ and Cd2+ increased to 96.12% and 94.38% after adjusting pH. As a result of loading the AgNPs on the modified membrane with a suitable mode, the antibiological fouling ability of the membrane was immensely improved by AgNPs. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of NO-CMC - Preparation of composite membranes - Characterization - Evaluation of membrane performance - Results and discussion - Characterization of the NO-CMC - Characterization of the prepared composite NF membranes - Evaluation of membrane performance DOI : https://doi.org/10.1007/s11998-019-00298-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00298-z Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34103
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 3 (05-06/2020) . - p. 731–746[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21734 - Périodique Bibliothèque principale Documentaires Disponible Laundry softener with colour care additives to protect against colour fading or colour changes of dyed textiles in the washing process / Klaus Henning in SOFW JOURNAL, Vol. 148, N° 6 (06/2022)
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Titre : Laundry softener with colour care additives to protect against colour fading or colour changes of dyed textiles in the washing process Type de document : texte imprimé Auteurs : Klaus Henning, Auteur Année de publication : 2022 Article en page(s) : p. 38-43 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adoucissants
Chlorure d'ammonium
Copolymère polyvinylpyrrolidone vinylimidazole
Couleurs -- Stabilité
Détergents -- Additifs
Détergents liquides
Lessives
Polyaziridine
ViscositéIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : To prevent colour fading or colour changes of dyed textiles in the washing process, up to 5% by weight of colour care additives are added to the laundry softener containing from 2 to 40% by weight of fabric softeners. This contains a mixture of polyvinylpyrrolidone-vinylimidazole copolymer, ammonium chloride and/or PE, PEI salt or mixtures thereof. The optimum ratio of ammonium chloride to polyvinylpyrrolidone-vinylimidazole copolymer may be 1:2 to 1:6 for improved stability. Note de contenu : - Properties of colour care additives
- Polyethylenimine
- Viscosity increase and product stabilisation
- Dyes
- Laundry softener with Sokalan HP 56K
- Table 1 : Composition of the laundry softener with Sokalan HP 56 K and ammonium chloride
- Table 2 : Viscosity and stability comparisons of liquid fabric softenersEn ligne : https://drive.google.com/file/d/1tPNYQ4tpwsFqLBHixMtMhvA33z4yJUSo/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37818
in SOFW JOURNAL > Vol. 148, N° 6 (06/2022) . - p. 38-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23477 - Périodique Bibliothèque principale Documentaires Disponible Modifying of UHMWPE fishing nets with layer-by-layer deposition method for antifouling properties / Gülsah Ekin kartal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
PermalinkNovel sensors could enable smarter textiles in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 209, N° 4648 (02/2019)
PermalinkPolymeric aziridines as benign crosslinkers for water-based coating applications in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
PermalinkStudy of cross-linking reactions on butadiene binders in aqueous finishing / Anna Bacardit in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 94, N° 6 (11-12/2010)
PermalinkSynergistically 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)
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