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Adsorption kinetics of cu(II) from aqueous solution by low cost chemically modified saw dust of morus alba / Sultan Alam in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 6 (11-12/2012)
[article]
Titre : Adsorption kinetics of cu(II) from aqueous solution by low cost chemically modified saw dust of morus alba Type de document : texte imprimé Auteurs : Sultan Alam, Auteur ; Azmat Ullah, Auteur ; Noor-ul-Amin, Auteur ; Najeeb-ur-Rehman, Auteur Année de publication : 2012 Article en page(s) : p. 466-471 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption
Cinétique chimique
Diffractométrie de rayons X
Fourier, Spectroscopie infrarouge à transformée de
Potentiel zeta
Sciure de bois
Solutions aqueuses (chimie)
Spectrométrie à énergie dispersiveIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Adsorption kinetics of Cu(II) from aqueous solution by low cost chemically modified saw dust of Morus alba was investigated. The samples were characterized by FT-IR, EDS, BET surface area and Zeta potential technique. The surfaces contain carbonyl and hydroxyl functional groups which act as a binding sites for Cu(II) ion. Adsorption kinetics of Cu(II) was tested by first order kinetics, Elovich and parabolic diffusion kinetic equations which shows that adsorption is a diffusion controlled process. The rate of adsorption was high at high adsorption temperature. Thermodynamic parameters like ΔH°, ΔS° and ΔG° were calculated from the kinetic data. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16533
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 6 (11-12/2012) . - p. 466-471[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14334 - Périodique Bibliothèque principale Documentaires Disponible Adsorption studies of basic green 4 from aqueous solution on Ca2+ exchanged clay / F. K. Bangash in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 5 (09-10/2011)
[article]
Titre : Adsorption studies of basic green 4 from aqueous solution on Ca2+ exchanged clay Type de document : texte imprimé Auteurs : F. K. Bangash, Auteur ; S. Alam, Auteur ; M. Khan, Auteur Année de publication : 2011 Article en page(s) : p. 366-374 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Adsorption
Diffractométrie de rayons X
Fourier, Spectroscopie infrarouge à transformée de
Microscopie électronique à balayage
Spectrométrie à énergie dispersiveIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : The adsorption of basic green 4 from aqueous solution on calcium exchanged clay (Attock-Ca and Swat-Ca) was studied. Clays were first purified and activated with H2SO4and then exchanged with Ca2+ions. Clay was characterized by BET surface area, XRD and SEM/EDS. The adsorption kinetic at 298 K and 306 K showed that the first order models were applied to the data. The rate constant increased with the rise in temperature of adsorption/activation. Thermodynamic properties (ΔE≠, ΔH≠, ΔS≠and ΔG≠) for the adsorption process were calculated. Positive values of ΔH≠showed that the adsorption of basic green 4 is endothermic. Positive values of ΔS≠reflected the increase in the disorder of the system at the solid-solution interface during adsorption. The Gibbs free energy, which is the driving force for adsorption is negative indicating spontaneous adsorption. Freundlich’s and Langmuir’s models described the equilibrium adsorption study and found to fit the experimental data. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12550
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Code-barres Cote Support Localisation Section Disponibilité 13302 - Périodique Bibliothèque principale Documentaires Disponible Amorphous low molecular weight aromatic compounds possessing no weight loss behavior in fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites even after calcination at 800°C / Jittraporn Saengkaew in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
[article]
Titre : Amorphous low molecular weight aromatic compounds possessing no weight loss behavior in fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites even after calcination at 800°C Type de document : texte imprimé Auteurs : Jittraporn Saengkaew, Auteur ; Takahumi Ogasawara, Auteur ; Katsumi Yamashita, Auteur ; Suwadee Kongparakul, Auteur ; Masakazu Nishida, Auteur ; Hideo Sawada, Auteur Année de publication : 2020 Article en page(s) : p. 1053-1064 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale
Composés organiques
Diffractométrie de rayons X
Fluoropolymères
Matériaux amorphes
Matériaux hybrides
Nitrure de boreLe nitrure de bore est un composé chimique du bore et de l'azote, de formule chimique brute BN (nombre égal d'atomes de chaque élément). Le nitrure de bore est isoélectronique avec le carbone et, comme ce dernier, existe sous plusieurs formes polymorphiques, dont l'une est analogue au diamant et l'autre au graphite. La forme diamant est l'un des matériaux les plus durs connus et la forme graphite est un lubrifiant apprécié. De plus, ces deux polymorphes possèdent des propriétés d'absorption radar.
Oligomères
Résonance magnétique nucléaire
Sol-gel, Procédé
Stabilité thermique
VinyltriméthoxysilaneIndex. décimale : 667.9 Revêtements et enduits Résumé : Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSi(OMe)3)n-RF ; n = 2, 3; RF = CF(CF3)OC3F7] undergoes the sol–gel reactions in the presence of hexagonal boron nitride (h-BN) nanoparticles and low molecular weight aromatic compounds (ArHs) such as bisphenol AF (BPAF) and 1-(2-naphthyl)ethanol (Naph-EtOH) under alkaline conditions at room temperature to afford the corresponding fluorinated oligomeric silica/h-BN/ArHs nanocomposites [RF-(VM-SiO3/2)n-RF/h-BN/ArHs]. TG–DTA analyses and XRD spectra measurements show that the encapsulated ArHs in the fluorinated oligomeric silica/h-BN nanocomposites exhibit an amorphous structure, affording no weight loss corresponding to the contents of the ArHs in the nanocomposites even after calcination at 800°C, although the simple blend hybrids of the RF-(VM-SiO3/2)n-RF/h-BN nanocomposites and the original ArHs provide not only the crystal characteristic toward the ArHs but also a clear weight loss behavior in proportion to the contents of the ArHs in the blend hybrids after calcination at 800°C. 1H MAS NMR spectra, UV–Vis spectra, and fluorescent spectra of the RF-(VM-SiO2)n-RF/h-BN/ArHs nanocomposites obtained through the sol–gel reactions under alkaline conditions showed the presence of the ArHs in the nanocomposites, respectively. Note de contenu : - Measurements
- Materials
- Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride/PBAF nanocomposites [RF-(VM-SiO3/2)n-RF/h-BN/BPAF]
- Preparation of simple blend hybrids of the RF-(VM-SiO3/2)n-RF/h-BN nanocomposites and original BPAF
- FTIR spectra measurements of the RF-(VM-SiO3/2)n-RF/h-BN/Naph-EtOH nanocompositesDOI : https://doi.org/10.1007/s11998-020-00331-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00331-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34392
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 4 (07/2020) . - p. 1053-1064[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21864 - Périodique Bibliothèque principale Documentaires Disponible Assessment of dust adhesion forces on the hydrophilic/hydrophobic glasses at two representative CSP sites in Morocco / Ayoub El Baraka in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
[article]
Titre : Assessment of dust adhesion forces on the hydrophilic/hydrophobic glasses at two representative CSP sites in Morocco Type de document : texte imprimé Auteurs : Ayoub El Baraka, Auteur ; Anouar Jorio, Auteur ; Ahmed Ennaoui, Auteur ; Asmae Khaldoun, Auteur Année de publication : 2023 Article en page(s) : p. 403-412 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de contact
Diffractométrie de rayons X
Encrassement
Energie de surface
Granulométrie
Miroirs solaires
Poussière
Revêtements antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : Many sites with high solar radiation like MENA regions face high dust loads that reduce the efficiency generation of solar plants. In this context, this paper provides an overview of dust adhesion mechanism on the surfaces of concentrated solar power (CSP) mirrors. The assessment of dust adhesion was performed on the hydrophilic/hydrophobic glasses at two representative CSP locations in Morocco (Ouarzazate and Midelt). Two types of reflecting mirrors are examined. The first one is based on superhydrophilic TiO2 protective coating, and the second one is the reflector mirror based on hydrophobic Al2O3 protective coating. The research shows that for particle radius of 2 µm, the Van der Waals force dominates for hydrophobic coating for Midelt with high humidity. In contrast, the capillary forces are prominent on the superhydrophilic TiO2 coating for Ouarzazate with low humidity. The results show good agreement with the X-ray diffraction results. However, as compared to Midelt dust, the dust particles from Midelt are formed of Smectites for the clay fractions. Smectite is highly swelling clay in water compared with Illite, Kaolinite, and Vermiculites types of clay minerals (low swelling clay in water). This work provided a facile method for the calculus of adhesion forces on the surfaces of CSP mirrors and as result helps us to select the best types of anti-soiling coating for reflector mirrors. Note de contenu : - THEORETICAL BACKGROUND : Dust adhesion mechanism - Adhesion forces
- EXPERIMENTAL PROCEDURES : Surface energy of dust particles - Dust size distribution - X-ray diffraction of dust particles - Water contact angles (WCA) of solar mirrors - Adhesion forces calculation
- Table 1 : Surface energy components of dust particles samples
- Table 2 : Water contact angle (WCA) values on solar mirrors samplesDOI : https://doi.org/10.1007/s11998-022-00681-3 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00681-3.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38851
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Code-barres Cote Support Localisation Section Disponibilité 23928 - Périodique Bibliothèque principale Documentaires Disponible Attemps to optimize the dispersion state during twin-screw extrusion of polypropylene/clay nanocomposites / G. Normand in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 1 (03/2017)
[article]
Titre : Attemps to optimize the dispersion state during twin-screw extrusion of polypropylene/clay nanocomposites Type de document : texte imprimé Auteurs : G. Normand, Auteur ; Edith Peuvrel-Disdier, Auteur ; Bruno Vergnes, Auteur Année de publication : 2017 Article en page(s) : p. 129-137 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Anhydride maléique
Argile
Composites -- Extrusion
Diffractométrie de rayons X
Dispersions et suspensions
Etat fondu (matériaux)
Nanoparticules
Polypropylène
RhéologieIndex. décimale : 668.4 Plastiques, vinyles Résumé : Polypropylene/organoclay nanocomposites were prepared by melt-mixing in a twin-screw extruder. Polypropylene grafted with maleic anhydride was used as compatibilizer. The evolution of the microstructure along the screw profile was characterized through dead-stop experiments. In order to quantify the multi-scale dispersion state of the nanocomposites, different techniques have been used: scanning electronic microscopy (SEM) to observe the large remaining aggregates, X-Ray diffraction measurements to characterize the intercalation state by measuring the interlamellar distance, and finally rheological characterizations in the molten state to assess the dispersion state at the nanoscale. The effects of low barrel temperatures and high matrix viscosity were tested, in order to improve exfoliation by an increase in shear stresses. Note de contenu : - MATERIALS AND METHODS : Materials - Twin-screw extrusion - Characterization
- RESULTS AND DISCUSSION : Evolution of the dispersion state along the screws - Effect of a low barrel temperature - Effect of a high viscosity matrix - InterpretationDOI : 10.3139/217.3318 En ligne : https://drive.google.com/file/d/1i-4ZYBKF_WuluOWvtuIHqGd_2OioNa_d/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28009
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Code-barres Cote Support Localisation Section Disponibilité 18732 - Périodique Bibliothèque principale Documentaires Disponible Automated clean leather dyeing assisted by wringing, ultrasound and microwave / Ying Gong in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 4 (04/2011)
PermalinkCarrier dyeing of polyphenylene sulphide fabric with disperse dye in COLORATION TECHNOLOGY, Vol. 129, N° 1 (02/2013)
PermalinkCeramic pigments containing IPN based on silicone/CNSL-S / S. Sankar in PAINTINDIA, Vol. LVI, N° 2 (02/2006)
PermalinkCharacterization and adhesion strength study of detonation-sprayed MoB–CoCr alloy coatings on 2Cr13 stainless steel substrate / Heping Lv in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 6 (11/2010)
PermalinkCharacterization of stereocomplex polylactide/nanoclay nanocomposites / Yortha Srithep in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 1 (03/2017)
PermalinkChromium(III) pigments : Use of leather wastes as alternative starting material / Kalarical Janardhanan Sreeram in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 7 (07/2011)
PermalinkColour and constitution relationships in organic pigments : Part 6 Azonaphtharylamide pigments / Robert M. Christie in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B1 (03/2006)
PermalinkComment voir les protéines et l'ADN en trois dimensions ? / Claudine Mayer in L'ACTUALITE CHIMIQUE, N° 387-388-389 (07-08-09-10/2014)
PermalinkComparison of physical and chemical properties between polysulfonamide and aramid / Wen-Liang Xue in CHEMICAL FIBERS INTERNATIONAL, Vol. 63, N° 2 (05/2013)
PermalinkConceptual model for spray pyrolysis mechanism : fabrication and annealing of titania thin films / A. Nakaruk in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)
PermalinkConditions hydrodynamiques et organisation structurale dans le dépôt formé lors du procédé d'ultrafiltration tangentielle de suspensions colloïdales : application à la bioraffinerie / Candice Rey in RHEOLOGIE, Vol. 34 (12/2018)
PermalinkContribution à la mise au point d'un traitement de conversion de la surface de subjectiles métalliques ferreux / Christiane Saunier / 1983
PermalinkCorrosion protection ability of hydrophobic zinc based coordination polymers on mild steel surface in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
PermalinkCristallographie et hautes pressions / Alain Polian in L'ACTUALITE CHIMIQUE, N° 387-388-389 (07-08-09-10/2014)
PermalinkCrystallization kinetics and multiple melting behavior of biodegradable poly(3-hydroxybutyrate-co-4-hydroxybutyrate) / B.-B. Tong in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 5 (11/2018)
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