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Multifunctional photoinitiators (MFPIs) : A new concept / R. Burrows in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B2 (06/2004)
[article]
Titre : Multifunctional photoinitiators (MFPIs) : A new concept Type de document : texte imprimé Auteurs : R. Burrows, Auteur ; R. Stephen Davidson, Auteur ; Derek R. Illsley, Auteur Année de publication : 2004 Article en page(s) : p. 127-135 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Calorimétrie
Emballages
Encre -- Séchage
Encre d'imprimerie
Extraction (chimie)
Photoamorceurs (chimie)
Produits chimiques -- Migration
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Silanes
Spectroscopie infrarouge en temps réelIndex. décimale : 667.9 Revêtements et enduits Résumé : The migration of unreacted photoinitiators and their by-products from UV-cured printing inks and coatings is an increasing concern for food packaging applications. This paper describes the synthesis of novel multifunctional photoinitiators (MFPI) for use in UV curing, with the aim of decreasing the amount of extractable components present in a UV-cured coating. The activity of these MFPIs was investigated using differential photocalorimetry (DPC) and real-time infrared spectroscopy (RTIR). These analytical techniques demonstrated that the increase in functionality and molecular weight of MFPIs did not affect the efficiency of the PI in initiating UV-curing polymerisation reactions. The extraction studies and high-performance liquid chromatography (HPLC) analysis demonstrated that the use of MFPI can bring about a considerable reduction in the amount of free PI extracted from the coating as the high functionality increased the likelihood of the PI being bound into the polymer coating. Note de contenu : - PREPARATIVE ROUTES TO MULTIFUNCTIONAL PHOTOINITIATORS : Preparation of aromatic ether-linked MFPI - Preparation of aromatic ester-linked MFPI - Preparation of aliphatic ester-linked MFPIs - Prepraation of amine-ene-linked MFPIs - Preparation of thiol-ene-linked MFPIs
- SILANE CHEMISTRYDOI : 10.1007/BF02699607 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699607.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5473
in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS > Vol. 87, B2 (06/2004) . - p. 127-135[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000391 - Périodique Bibliothèque principale Documentaires Disponible Naphthoquinone colorants from Arnebia nobilis Rech.f / Anjali Arora in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
[article]
Titre : Naphthoquinone colorants from Arnebia nobilis Rech.f Type de document : texte imprimé Auteurs : Anjali Arora, Auteur ; Deepti Gupta, Auteur ; Deepali Rastogi, Auteur ; Mohan Gulrajani, Auteur Année de publication : 2012 Article en page(s) : p. 350-355 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse spectrale
Chromatographie
Colorants végétaux
Extraction (chimie)
Naphtoquinone
Teinture -- Fibres textilesIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The roots of Arnebia nobilis have traditionally been used as a colorant in food and cosmetic preparations. The deep red colour obtained is attributed to the presence of shikonin and its isomer alkannin and their derivatives. In this study, five colouring components were extracted from the roots of A. nobilis. These were separated and purified chromatographically and characterised using various spectrophotometric techniques. Three of the five components were identified. The major component was found to be alkannin ?, ?-dimethylacrylate [5,8-dihydroxy-2-(1?-?, ?-dimethylacryloxy-4?-methylpent-3?-enyl)-1,4-naphthoquinone], accounting for nearly 25% of the total colouring matter. Alkannin acetate [2-(1?-acetoxy-4?-methylpent-3?-enyl)-5,8-dihydroxy-1,4-naphthoquinone] made up ca. 8% and shikonin [(5,8-dihydroxy-4?-methylpent-3?-enyl)-1,4-naphthoquinone] contributed ca. 6% of the colouring matter. Polyester was dyed pink, nylon was dyed blue and all other substrates acquired a purple hue under similar dyeing conditions. The dyed fabrics showed excellent wash, rub and perspiration fastness; however, light fastness was found to be poor. Note de contenu : - EXPERIMENTAL - Materials - Methods : extraction of colorants - Chromatographic separation of colorants - Fabric preparation - Dyeing studies - Determination of depth of shade - Fastness tests
- RESULTS AND DISCUSSION - Chromatographic analysis (TLC and column chromatography - Optimisation of detection wavelength for HPLC - HPLC analysis) - Spectroscopic analysis - Dyeing studies (colour fastness properties)DOI : 10.1111/j.1478-4408.2012.00383.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2012.00383.x/pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15802
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Code-barres Cote Support Localisation Section Disponibilité 14163 - Périodique Bibliothèque principale Documentaires Disponible Natural alternative to retinoids for a sweet aging process / Rosalia Mantilla in SOFW JOURNAL, Vol. 145, N° 11 (11/2019)
[article]
Titre : Natural alternative to retinoids for a sweet aging process Type de document : texte imprimé Auteurs : Rosalia Mantilla, Auteur ; Olga Laporta, Auteur ; Elena Cañadas, Auteur ; Sylesh Venkataraman, Auteur ; Raquel Delgado, Auteur Année de publication : 2019 Article en page(s) : p. 14-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge
Extraction (chimie)
Ingrédients cosmétiques -- Suppression ou remplacement
Peau -- Soins et hygiène
Rétinoïdes
Stevia
Stress oxydatifIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The growing concern over environmental problems along with economic constraints, require the development of environmentally and economically sustainable extraction techniques to overcome many of the disadvantages of conventional extractions. PHENOBIO™ subcritical water extraction technology meets the challenges of the 21st century, to protect both the environment and consumers through a sustainable and innovative process. The eco-friendly extraction technology was applied to locally-sourced organic stevia to obtain STEVISSE™ advanced botanical ingredient, which presents a retinoid-like activity to achieve a younger looking complexion in a sustainable way and without retinoids side effect on the skin. Note de contenu : - Botanical extracts in a very eco-friendly way
- Natural gentler alternative to retinoids
- Smoothing the natural passing of time
- Defense against oxidative stress
- Minimizing skin aging without irritation
- Fading wrinkles away naturally
- Fig. 1 : Phytochemical recovery using PHENOBIO™ subcritical water technology extraction
- Fig. 2 : Percentage of fold change of upregulated antioxidant defense genes
- Fig. 3 : Percentage of fold change of downregulated pro-inflammatory and matrix metalloproteinases (MMPs) genes
- Fig. 4 : Photographs of the crow’s feet area before and after 28 of treatmentEn ligne : https://drive.google.com/file/d/1Iqp-9zysYb5P1Rt4EEN7EPpTLCnQ5jRt/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33577
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Code-barres Cote Support Localisation Section Disponibilité 21326 - Périodique Bibliothèque principale Documentaires Disponible Natural colorant extraction from Cinnamomum camphora tree leaves of different maturities and its ultrasonic-assisted extraction process / Kang Gong in COLORATION TECHNOLOGY, Vol. 135, N° 4 (08/2019)
[article]
Titre : Natural colorant extraction from Cinnamomum camphora tree leaves of different maturities and its ultrasonic-assisted extraction process Type de document : texte imprimé Auteurs : Kang Gong, Auteur ; Yi Pan, Auteur ; Luqman Jameel Rather, Auteur ; Wuchao Wang, Auteur ; Zhou Qi, Auteur ; Tonghua Zhang, Auteur ; Qing Li, Auteur Année de publication : 2019 Article en page(s) : p. 312-321 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Camphrier et constituants Le camphrier ou arbre à camphre (Cinnamomum camphora (L.) J. Presl, 1825) est une espèce d'arbres de la famille du laurier (Lauraceae) dont on extrait le camphre par distillation de son bois, dit "bois de Ho".
Colorants végétaux
Extraction (chimie)
Extraction par ultrasonsIndex. décimale : 667.2 Colorants et pigments Résumé : This study investigated natural colorant extraction from camphor tree leaves using a green and effective process. Ethanol, acetic acid, aqueous sodium carbonate and an aqueous solution of cellulase enzyme were used to examine the extraction performance, with and without the assistance of ultrasonics. Results showed that when subjected to changes in frequency and extraction time, ultrasonics is able to accelerate the extraction process and achieve a better yield for chlorophyll and anthocyanin extraction from fresh leaves compared with a traditional heating bath at similar temperatures. However, when an alkaline solvent was used to extract dark brown colorant from the old leaves, a traditional heating bath was found to be more effective than ultrasonic extraction. Cellulase enzyme failed to show its effectiveness in this study when serving as a colorant-extracting solvent, regardless of the use of ultrasonics. Note de contenu : - EXPERIMENTAL : Collection and preparation of the leaves - Extraction equipment and condition - Extracting solvents - Extraction process
- RESULTS AND DISCUSSION : Extraction performance - Ultrasonic-enhanced extraction process - Ethanol extraction - Acid and alkaline extraction Enzyme extraction - Colour yield of camphor tree leaves with different extracting solvents and extraction methodsDOI : 10.1111/cote.12406 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12406 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32834
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Code-barres Cote Support Localisation Section Disponibilité 21090 - Périodique Bibliothèque principale Documentaires Disponible Natural dyeing of air plasma-treated wool fabric with Rubia tinctorum L. and prediction of dyeing properties using an artificial neural network / Can Eyupoglu in COLORATION TECHNOLOGY, Vol. 140, N° 1 (02/2024)
[article]
Titre : Natural dyeing of air plasma-treated wool fabric with Rubia tinctorum L. and prediction of dyeing properties using an artificial neural network Type de document : texte imprimé Auteurs : Can Eyupoglu, Auteur ; Seyda Eyupoglu, Auteur ; Nigar Merdan, Auteur ; Zeynep Omerogullari Basyigit, Auteur Année de publication : 2024 Article en page(s) : p. 91-102 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse morphologique
Colorants végétaux
Colorimétrie
Extraction (chimie)
Laine
Résistance à l'abrasion
Résistance au lavage
Technique des plasmas
Teinture -- Fibres textiles
Traîtements de surfaceIndex. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, the ecological dyeing process of wool fabrics was investigated. Wool fabric samples were treated with atmospheric pressure plasma-jet and corona discharge plasma to modify the surface to make the process sustainable and greener. The samples were dyed with the aqueous extract procured from the powdered roots of Rubia tinctorum L. (madder) using the ultrasonic-assisted method. Scanning electron microscopy and Fourier Transform–infrared analysis were performed to investigate the effect of plasma treatment on the physical and chemical properties of wool fibres. The effects of plasma treatment type, plasma treatment parameters and the duration of dyeing on colorimetric and fastness properties were investigated. The etching of the wool fibre surface and roughness after plasma treatment were proven with scanning electron microscopy images. The Fourier Transform–infrared spectra showed that no significant differences in the functional groups of wool fibre occurred after plasma treatment. The experimental results proved that plasma treatment parameters and dyeing time had an effect on the colorimetric and fastness properties of the samples. Furthermore, an artificial neural network model was proposed for estimating the dyeing properties of wool fabrics, namely, L, a, b, K/S, colour change, rubbing fastness (dry) and rubbing fastness (wet). The experimental results show that the proposed model achieves regression values greater than 0.97 for all dyeing properties. The proposed model is successful and can be efficiently used for estimating the dyeing characteristics of wool fabrics. Note de contenu : - MATERIALS AND METHODS : Materials - Dye extraction - Plasma application - Dyeing process - Surface morphology analysis - FTIR analysis - Colorimetric analysis - Fastness analysis - Proposed ANN model
- RESULTS AND DISCUSSION : Scanning electron microscopy analysis - FTIR analysis - Fastness properties - Analysis of colour parameters - Neural network-based results
- Table 1 : The washing and rubbing fastness values of the samples
- Table 2 : Colour properties of the samples
- Table 3 : Regression results of the proposed model for the dyeing properties of samplesDOI : https://doi.org/10.1111/cote.12700 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12700 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40393
in COLORATION TECHNOLOGY > Vol. 140, N° 1 (02/2024) . - p. 91-102[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24413 - Périodique Bibliothèque principale Documentaires Disponible Natural dyes in madder (Rubia spp.) and their extraction and analysis in historical textiles / Richard S. Blackburn in COLORATION TECHNOLOGY, Vol. 133, N° 6 (12/2017)
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PermalinkPeintures et vernis. Détermination du taux de lixiviation des biocides contenus dans les peintures antisalissures - Partie 3 : Calcul du taux de lixiviation de l'éthylène-bis(dithiocarbamate) de zinc (zinèbe) par détermination de la concentration d'éthylènethiourée dans l'extrait - Norme ISO 15181-3 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2007)
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PermalinkPeintures et vernis. Détermination du taux de lixiviation des biocides contenus dans les peintures antisalissures - Partie 6 : Calcul du taux de lixiviation du tralopyril par détermination de la concentration de son produit de dégradation dans l'extrait - Norme ISO 15181-6 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2012)
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