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Assessment of efficiency of repellent formulations with N,N-diethyl-m-toluamide in laboratory conditions / R. Milutinović in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 21, N° 1 (02/1999)
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Titre : Assessment of efficiency of repellent formulations with N,N-diethyl-m-toluamide in laboratory conditions Type de document : texte imprimé Auteurs : R. Milutinović, Auteur ; G. Vuleta, Auteur ; J. Milić, Auteur ; N. Stajković, Auteur Année de publication : 1999 Article en page(s) : p. 7-14 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Insectes
N,N-diéthyl-3-méthylbenzamide
Pharmacocinétique
Polyvinylpyrrolidone
Répulsifs (chimie)Index. décimale : 668.5 Parfums et cosmétiques Résumé : The affinity of N,N-diethyl-m-toluamide) (DEET) for various polymers that are potential inert carriers (PEG, PVP, NaCMC, PAA) was studied. Mixtures of DEET and the polymers were prepared and analysed for DEET vapour release using head space analysis. Polyvinylpyrrolidone (PVP) showed the highest affinity for DEET. Several insect repellent formulations in the form of a hydrogel, an o/w cream and a stick were prepared with 5% w/w DEET and either 1% w/w or no PVP. The release of DEET from the formulations was investigated by Head Space gas–mass spectrometry at 32°C. The degree of absorption of DEET through the skin was evaluated by applying these topical preparations to shaved rabbit skin and measuring DEET content in the blood samples by gas–mass spectrometry at various time intervals after application. Based on these results the pharmacokinetic parameters were determined. The minimum penetration of DEET through rabbit skin was obtained with a hydrogel containing PVP as a carrier. The biological efficiency of repellent formulations containing 5% DEET (w/w) was evaluated for repellency using the mosquito Aedes aegypti. The results demonstrated that the hydrogel formulation based on polyacrylic acid containing 5% DEET (w/w) supplemented with 1% PVP (w/w), could serve as a suitable vehicle for repellent preparations containing DEET. DOI : 10.1046/j.1467-2494.1999.181696.x En ligne : https://onlinelibrary.wiley.com/doi/10.1046/j.1467-2494.1999.181696.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26499
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 21, N° 1 (02/1999) . - p. 7-14[article]Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Characterization of yield stress and slip behaviour of skin/hair care gels using steady flow and LAOS measurements and their correlation with sensorial attributes / S. Ozkan in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 34, N° 2 (04/2012)
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Titre : Characterization of yield stress and slip behaviour of skin/hair care gels using steady flow and LAOS measurements and their correlation with sensorial attributes Type de document : texte imprimé Auteurs : S. Ozkan, Auteur ; T. W. Gillece, Auteur ; L. Senak, Auteur ; David J. Moore, Auteur Année de publication : 2012 Article en page(s) : p. 193-201 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acide polyacrylique
Analyse sensorielle
Caractérisation
Copolymères
Cosmétiques
Epaississants
Gels -- Emploi en cosmétologie
Maléique, Acide
Polyvinyl éther
Polyvinylpyrrolidone
RhéologieTags : 'Gel main/cheveux' 'Grande amplitude oscillatoire' Rhéologie 'Corrélation sensorielle' 'Limite élasticité' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Gels made with three different polymers widely used as rheology modifiers in cosmetic formulations (cross-linked poly(acrylic acid), cross-linked poly(maleic acid-alt-methyl vinyl ether) copolymer and cross-linked poly(acrylic acid-co-vinyl pyrrolidone) copolymer) were characterized by rheological and sensory evaluation methods to determine the relationship between sensorial perception and corresponding rheological parameters. Both conventional rheological characterization methods and a more recent method, Fourier Transform Rheology with Large Amplitude Oscillatory Flow data (LAOS), were utilized to characterize the material with and without wall slip. Sensorial analyses were implemented in vivo to evaluate the perceived ease of initial and rub-out spreadability, cushion, pick-up and slipperiness attributes of the gels. Results were statistically analysed by both variance (ANOVA) and principle component analysis (PCA). Sensorial panel testing characteristics discriminated the three materials, and PCA analyses revealed that sensory attributes could be well predicted by rheological methods. Rheological experiments, without wall slip, revealed that gel strength in the linear viscoelastic region (LVR) and yield stress of these materials are similar, but exhibit significantly different wall slip and thixotropy behaviour in the low shear rate region under wall slip conditions. Above the critical shear rate, which corresponds to the yield stress, all tested materials did not slip and behaved as conventional, shear thinning polymeric fluids. In particular, the rheological parameters and sensorial perception of the 1% cross-linked vinyl pyrrolidone/acrylic acid copolymer were significantly affected by wall slip and/or thixotropy-related shear banding phenomena. Note de contenu : - MATERIALS AND METHODS : Rheological characterization (dynamic oscillatory measurements - Steady torsional flow experiments - Continuous shear rate ramp tests - extensional tests) - Sensory evaluation - Data analysis
- RESULTS AND DISCUSSION : Rheological characterization (steady torsional flow experiment - Continuous stress of shear rate ramp measurements to establish the shear rate dependency of shear stress and viscosity at different gap openings - Extensional tests - Sensory evaluation - Correlation of sensory ratings with conventional rheological parameters - Correlation of sensory ratings with large amplitude oscillaroty shear flow (LAOS) parameters (Chebyshev coefficients)DOI : 10.1111/j.1468-2494.2012.00702.x En ligne : https://onlinelibrary.wiley.com/doi/10.1111/j.1468-2494.2012.00702.x Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14392
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Code-barres Cote Support Localisation Section Disponibilité 13819 - Périodique Bibliothèque principale Documentaires Disponible A coloured polyester fabric with antimicrobial properties conferred by copper nanoparticles / Sepideh Afshari in COLORATION TECHNOLOGY, Vol. 135, N° 6 (12/2019)
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Titre : A coloured polyester fabric with antimicrobial properties conferred by copper nanoparticles Type de document : texte imprimé Auteurs : Sepideh Afshari, Auteur ; Majid Montazer, Auteur ; Tina Harifi, Auteur ; Mahnaz Mahmoudi Rad, Auteur Année de publication : 2019 Article en page(s) : p. 427-438 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens
Cuivre
Fibres polyesters
Fibres textiles -- Propriétés mécaniques
Fibres textiles synthétiques -- Analyse
Hydroxyde de sodiumL'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol.
La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude.
Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate.
La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante.
Nanoparticules
Polyvinylpyrrolidone
Sulfate de cuivreLe sulfate de cuivre est formé par la combinaison d'un ion cuivre (Cu2+) et d'un ion sulfate (SO42- ). Il a donc pour formule : CuSO4. Il est commercialisé soit anhydre, avec cette formule, soit pentahydraté et a alors la formule CuSO4,5H2O, comme sur la figure ci-contre. Il existe également avec une ou trois molécules d'eau d'hydratation.
FABRICATION : Le sulfate de cuivre est obtenu industriellement comme sous-produit du décapage chimique du cuivre par l'acide sulfurique. Cet acide n'attaquant pas le cuivre métallique, seule sa forme oxydée présente en surface sous forme d'oxydes, de carbonates (vert de gris) et autres, passe en solution. Dans ces conditions, seul le degré d'oxydation II (forme cuivrique) est stable.
UTILISATION : Une des principales utilisations actuelle du sulfate de cuivre est la préparation (industrielle ou non) de fongicides pour l'agriculture y compris biologique. La forme la plus courante est la bouillie bordelaise constituée de sulfate de cuivre neutralisé par la chaux.
TOXICITE : Le sulfate de cuivre est un produit toxique.
Surfaces antimicrobiennes
UltrasonsIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, we aimed to produce a coloured polyester fabric through the in situ sonosynthesis of copper nanoparticles using copper sulphate, hydrazine, sodium hydroxide and polyvinylpyrrolidone. The treated fabrics were characterised by X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and elemental mapping. Moreover, mechanical properties, wettability and antibacterial/antifungal activities of the treated fabrics were evaluated. Central composite design based on the response surface methodology was used to study the effect of copper sulphate, hydrazine hydrate and sodium hydroxide on the weight gain and colour of the treated fabrics. In addition to their roles as reducing agents, hydrazine and sodium hydroxide were responsible for the simultaneous aminolysis and hydrolysis of polyester, increasing the adsorption of nanoparticles on the surface. According to the results, the reddish brown samples treated with copper nanoparticles showed excellent antibacterial and antifungal efficiencies, improved tensile strength and decreased wettability. Note de contenu : - EXPERIMENTAL : Materials - Preparation - Test methods
- RESULTS AND DISCUSSIONS : In situ sonosynthesis of copper nanoparticles on polyester fabric - Weight and colour changes - XRD - FESEM and EDX micrographs - FTIR analysis - The effect of ultrasound - Antibacterial/antifungal activities - Mechanical properties - WettabilityDOI : 10.1111/cote.12430 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12430 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33375
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Code-barres Cote Support Localisation Section Disponibilité 21322 - Périodique Bibliothèque principale Documentaires Disponible Dye aggregation and interaction of dyes with a water-soluble polymer in ink-jet ink for textiles / Ju-Young Park in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)
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Titre : Dye aggregation and interaction of dyes with a water-soluble polymer in ink-jet ink for textiles Type de document : texte imprimé Auteurs : Ju-Young Park, Auteur ; Yuichi Hirata, Auteur ; Kunihiro Hamada, Auteur Année de publication : 2012 Article en page(s) : p. 184-191 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants
Encre jet d'encre
Impression jet d'encre
Polymères hydrosolubles
Polyvinylpyrrolidone
Précipitation (chimie)
Sulfonates
Teinture -- Fibres textilesIndex. décimale : 677 Textiles Résumé : Detailed understanding of the interaction between dyes and additives and the aggregation behaviour of the dye molecules in aqueous solutions is required to develop ink-jet ink for textiles. In the present study, the aggregation behaviour of three acid dyes (CI Acid Red 88, CI Acid Red 13 and CI Acid Red 27) containing different number of sulphonate groups in aqueous solutions was investigated by means of visible absorption spectroscopy. As a result, the higher the solubility of the dyes in water (the larger the number of sulphonate groups in the dyes), the lower are the aggregation constants of the dyes. For all the dyes, the aggregation constants decreased with increasing temperature, indicating the exothermic process of the dye aggregation. The thermodynamic process for CI Acid Red 88 with one sulphonate group is less enthalpic and more entropic than that for CI Acid Red 13, which contains two sulphonate groups. CI Acid Red 27, which includes three sulphonate groups, hardly forms any aggregates. To elucidate the effects of the polymer additive, the binding constants of the dyes with the water-soluble polymer, poly(vinylpyrrolidone) and the aggregation constants of the dyes in aqueous polymer solutions were also estimated. In addition, the binding constants were influenced by the number of sulphonate groups in the acid dyes: the larger number of sulphonate groups diminished the binding constants. The aggregation constants in the presence of poly(vinylpyrrolidone) were smaller than those in its absence at every temperature for all dyes. This suggests that poly(vinylpyrrolidone) has disaggregation effects. Furthermore, poly(vinylpyrrolidone) makes the aggregation process less enthalpic with a greater entropic change. Thus, the aggregation process of the dyes in the polymer solutions is thermodynamically different from that in water, reflecting the interactions between the dyes and the polymer. Note de contenu : - EXPERIMENTAL : Materials - Visible absorption spectrum measurements
- RESULTS AND DISCUSSION : Aggregation of dyes in aqueous solutions - Interaction between dyes and PVP - Aggregation of dyes in the polymer solutionsDOI : 10.1111/j.1478-4408.2012.00370.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15118
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Code-barres Cote Support Localisation Section Disponibilité 13933 - Périodique Bibliothèque principale Documentaires Disponible Effects of polymer viscosity and nanofillers on morphology of nanofibers obtained by a gas jet method / J.-H. Shang in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 1 (03/2014)
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Titre : Effects of polymer viscosity and nanofillers on morphology of nanofibers obtained by a gas jet method Type de document : texte imprimé Auteurs : J.-H. Shang, Auteur ; R. E. Benavides, Auteur ; Sadhan C. Jana, Auteur Année de publication : 2014 Article en page(s) : p. 103-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux)
Morphologie (matériaux)
Nanofibres
Nanoparticules
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
Poids moléculaires
Polyacétate de vinyle
Polyéthylène glycol
Polymères en émulsion
Polyvinylpyrrolidone
ViscositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : This research evaluates the effects of molecular weight, polymer solution concentration, and carbon nanotube concentration on diameter distribution of polymer nanofibers produced with gas jet fiber (GJF) method. In GJF method, the shear and extensional forces of high-velocity gas jets are used to spin fibers from polymer solutions. The correlation between polymer molecular weight and fiber diameter distribution is studied along with the effect of multi-walled carbon nanotubes (MWCNT) on fiber diameter distribution. The paper also assesses how carbon nanotubes distribute in bi-component polymer nanofibers. It is found that polymer chain entanglement is a key determinant of fiber diameter. MWCNTs do not show preference for distribution in polyvinylidene pyrrole (PVP) and polyvinylacetate (PVAc) and instead appear on the surfaces of the fibers. A negative value of spreading coefficient supports this observation. Note de contenu : - Diameter and morphology of PEO nanofibers and microfibers by GJF method
- Effects of carbon nanotubes on single component polymer nanofibers
- Distribution of carbon nanotubes in bi-component polymer nanofibersDOI : 10.3139/217.2817 En ligne : https://drive.google.com/file/d/1wQGdWi-sDRXkW_ozpB3zMqdRxLSKRYqW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20581
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Code-barres Cote Support Localisation Section Disponibilité 16006 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of a mixture of castor oil and polyvinylpyrrolidone for the lubrication of dry / Gomaa Abdel-Maksoud in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 1 (01-02/2022)
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PermalinkFacile fabrication of the durable micro/nano-superhydrophilic/superoleophobic surface through one-step spraying for efficient oil–water separation / Mengfan Luo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 3 (05-06/2020)
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PermalinkMechanical and numerical analysis of polymer-natural fiber composites for denture applications / Wassan S. Hussain in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 33, N° 4 (08/2023)
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PermalinkMechanical properties of PMMA-based biocomposites with polyamide and polyvinylpyrrolidone blends for denture applications / Wassan S. Hussain in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 33, N° 5 (10/2023)
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PermalinkA moisture-absorbing and abrasion-resistant transparent coating on polystyrene / Svenja Grube in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
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PermalinkNonionic surfactants and dispersants for biopolishing and stonewashing with Hypocrea jecorina cellulases / Luana Zilz in COLORATION TECHNOLOGY, Vol. 129, N° 1 (02/2013)
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PermalinkPreparation and evaluation of a UV-curing hydrophilic semi-IPN coating for medical guidewires / Wenfei Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
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PermalinkPreparation of active-passive anticorrosion antistatic epoxy nanocomposite coatings loaded with CeO2, CeO2@C, and CHS particles / Sara Sabzavar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)
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PermalinkPVP-wrapped fullerenes as skin protection / Mio Murakami in PERSONAL CARE EUROPE, Vol. 12, N° 2 (04/2018)
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PermalinkPermalinkStability for dispersions / Simona Schwarz in EUROPEAN COATINGS JOURNAL (ECJ), N° 07-08/2010 (07-08/2010)
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PermalinkSuperhydrophilic multifunctional antifogging coatings based on triethoxysilyl-terminated poly(N-vinylpyrrolidone) / Fangfei Meng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
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PermalinkSynthesis of ZnS–Mn nano-luminescent pigment for ink applications in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
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PermalinkThe colour properties of polyester/cotton knitted fabrics coated with poly(N-vinyl-2-pyrrolidone) / Giovana A. Vieira in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)
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