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Effect of nano polytetrafluoroethylene on epoxy melamine coating / S. S. Ramteke in SURFACE COATINGS INTERNATIONAL, Vol. 95, 3 (05/2012)
[article]
Titre : Effect of nano polytetrafluoroethylene on epoxy melamine coating Type de document : texte imprimé Auteurs : S. S. Ramteke, Auteur ; P. A. Wasekar, Auteur ; A. C. Rao, Auteur ; Shashank T. Mhaske, Auteur Année de publication : 2012 Article en page(s) : p. 134-137 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ammoniac
Epoxydes
Fourier, Spectroscopie infrarouge à transformée de
Granulométrie
Lumière -- Diffusion
MélamineLa mélamine, de nom chimique 1,3,5-triazine-2,4,6-triamine, est parfois dénommée cyanuramide ou cyanurotriamine. Sa formule brute est C3H6N6.
Les "résines mélamine-formaldéhyde" ou "mélamine-formol" (sigle MF) sont appelées "mélamine" dans le langage courant. Elles font partie de la famille des aminoplastes qui regroupe des résines thermodurcissables aminées, issues d'un comonomère tel l'urée ou la mélamine, parfois le thiocarbamide, le cyanamide hydrogène ou le dicyandiamide ; le second comonomère étant le formaldéhyde.
Nanoparticules
Polytétrafluoréthylène
Poudres
Résistance à l'abrasion
Résistance chimique
Revêtements
SodiumLe sodium est un élément chimique, de symbole Na et de numéro atomique 11. C'est un métal mou et argenté, qui appartient aux métaux alcalins. On ne le trouve pas à l'état de corps pur dans la nature, mais il est très abondant sous forme de composés, par exemple dans le sel. Il brûle avec une flamme jaune.
Le sodium possède 22 isotopes connus, avec un nombre de masse variant entre 18 et 37.Index. décimale : 667.9 Revêtements et enduits Résumé : Nano-materials attract well-defined attention in today's scientific world. Nano poly(tetrafluoroethylene) (PTFE was prepared by a forced impact method from PTFE powder. The PTFE was characterised by dynamic light scattering, particle-size analysis. To improve the surface interactivity and dispersibility of nano-PTFE, it was treated with sodium metal in liquid ammonia. The PTFE material was incorporated in a coating formulation and coating composite characterised by Fourier transform infrared spectroscopy (FTIR). In this work, the PTFE was incorporated into the coating at various loadings and its effect on vairous properties was studied. It was observed that the scratch resistance and chemical resistance were increased whilst the critical surface tension and the coefficient of friction were decreased. Note de contenu : - EXPERIMENTAL : Material - Preparation of nano-PTFE and its treatment - Resin and coating preparation - Characterisation
- RESULTS AND DISCUSSION : FTIR characterisation - Performance properties - Surface tension characteristics - Coefficient of friction studiesEn ligne : https://drive.google.com/file/d/1uSPKSamZWIL7wRiTJ8RODkmDe6O8sQr6/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14930
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Code-barres Cote Support Localisation Section Disponibilité 13907 - Périodique Bibliothèque principale Documentaires Disponible Effect of nanoclay addition on morphology and elastomeric properties of dynamically vulcanized natural rubber/polypropylene nanocomposites / Natinee Lopattananon in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 3 (07/2014)
[article]
Titre : Effect of nanoclay addition on morphology and elastomeric properties of dynamically vulcanized natural rubber/polypropylene nanocomposites Type de document : texte imprimé Auteurs : Natinee Lopattananon, Auteur ; S. Tanglakwaraskul, Auteur ; A. Kaesaman, Auteur ; M. Seadan, Auteur ; T. Sakai, Auteur Année de publication : 2014 Article en page(s) : p. 332-341 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères -- propriétés mécaniques
Argile
Caoutchouc
Matériaux hybrides
Mélanges-maîtres (chimie)
Montmorillonite
Nanoparticules
Polypropylène
VulcanisationIndex. décimale : 668.4 Plastiques, vinyles Résumé : Thermoplastic vulcanizate (TPV) nanocomposites based on 60/40 (%wt) natural rubber (NR)/polypropylene (PP) blends were prepared by melt blending in an internal mixer. Sodium montmorillonite (Na-MMT) was first added in natural rubber latex to obtain natural rubber/clay masterbatch, which was subsequently dynamically crosslinked while mixing with molten PP. The effect of Na-MMT content were examined concerning elastomeric properties of NR/PP blends dynamically vulcanized using phenolic resin as a curing agent. Morphology characterization observed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and 3D microfocus X-ray computerized tomography showed that the dynamic vulcanization with nanoclay addition changed the blend morphology from a co-continuous-like structure to droplet-like phase one, and the clay remained within NR phase in intercalated and aggregated forms. Furthermore, the presence of clay induced the decrease in crosslinking of NR, but promoted the mixing between NR and PP during dynamic vulcanization. This suggested that nanoclay worked as a kind of morphology modifier during dynamic vulcanization. The addition of clay marginally enhanced the 100 % modulus and tensile strength, but led to the decrease of the elongation at break. The optimal level of tensile strength improvement was obtained with loading of 5 phr clay. The permanent set of the NR/PP/Clay TPV nanocomposites was well maintained at the acceptable level as elastomer. The resistances to oil and heat were improved with incorporation of clay, proportional to clay loading. The experimental results indicated that the nanoclay had a positive effect on improving the 60/40 NR/PP blend morphology, which provided a little benefit to strength of the TPVs. However, the addition of nanoclay offered an improvement in oil and thermal resistances due to a combined effect of the clay dispersion and improved morphology of NR and PP blends. Note de contenu : - EXPERIMENTAL : Materials - Preparation of TPV/clay nanocomposites - Characterization
- RESULTS AND DISCUSSION : Dispersion of clay - Morphology of TPV/clay nanocomposites - Gel content of TPV/clay nanocomposites - Mechanical properties - Thermal stability - Oil swellingDOI : 10.3139/217.2935 En ligne : https://drive.google.com/file/d/1HcHWGqwmS10eZ3v8TTRo7EW18iPCsGxZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21730
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Code-barres Cote Support Localisation Section Disponibilité 16404 - Périodique Bibliothèque principale Documentaires Disponible Effect of nanoclay surface modifier chemical reactivity on morphology and rheological properties of PP/PA6 blend nanocomposite / G. R. Pircheraghi in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 4 (08/2013)
[article]
Titre : Effect of nanoclay surface modifier chemical reactivity on morphology and rheological properties of PP/PA6 blend nanocomposite Type de document : texte imprimé Auteurs : G. R. Pircheraghi, Auteur ; Hossein Nazockdast, Auteur ; M. M. Salehi, Auteur Année de publication : 2013 Article en page(s) : p. 354-360 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Argile
Cations
DiamineUne diamine est un type de polyamine contenant exactement deux groupes amine. Les diamines sont principalement utilisées comme monomères pour synthétiser des polyamides, des polyimides et des polyurées. La principale diamine produite est le 1,6-diaminohexane, précurseur du Nylon 6-6, suivie de l'éthylènediamine1. L'hydrazine (H2NNH2) n'est en général pas considérée comme une diamine puisque ce n'est ni une amine (pas de carbone), ni une dibase.
Morphologie (matériaux)
Nanoparticules
Polyamide 6
Polypropylène
Rhéologie
Traîtements de surfaceIndex. décimale : 668.4 Plastiques, vinyles Résumé : An attempt was made to explore the role of nanoclay surface modifier chemical reactivity on the morphology and the rheological properties of a polypropylene/polyamide6 (PP/PA6 75/25) nanocomposite blend. The Na-MMT surface was modified with two types of cations; a) diamine cation (D-Clay), and b) a combination of diamine and quaternary alkylammonium cations (A-Clay) via cation exchange reaction. The „nanocomposites samples compatibilized with PP-g-MA were prepared by melt compounding in an internal mixer. The XRD patterns indicated the intercalated/exfoliated microstructure for both nanocomposite samples. The SEM results showed a significant decreases in the PA6 droplet size, from 3.2?m of the simple blend to the 0.4?m in the D-Clay containing sample. Moreover, in the sample containing A-Clay the average droplet size was found to be 1?m. The D-Clay containing sample showed the rheological properties similar to a simple blend in high frequencies with a nonterminal be„havior in low frequencies storage modulus. This was explained by locating of D-Clay layers in the interphase and hence, significantly reducing the effective interfacial tension, ?/R. In contrast, the sample containing A-Clay showed an increased complex viscosity and storage modulus within a range of frequencies, which was attributed to presence of a large amount of A-Clay layers in the PP matrix. These types of nanoclay partitioning were explained by the possibility of chemical reaction between amine group of nanoclay surface modifier and maleic group of PP-g-MA compatibilizer or in-situ formed block copolymer. Consequently, the D-Clay layers bounded with PP-g-MA is preferentially located in the interphase, while, the non reactive nanoclay layers (containing alkylammonium cations) is dispersed in the PP matrix by assistance of PP-g-MA. These findings were also evidenced by TEM micrograph of both nanocomposite samples. Note de contenu : - EXPERIMENTAL/MODELING/SIMULATION : Materials - Na-MMT surface modification - Nanocomposite preparation
- CHARACTERIZATIONDOI : 10.3139/217.2680 En ligne : https://drive.google.com/file/d/1_UVNJId8hAvNEJDYdeG9PJdPTXD622Ly/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19279
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Code-barres Cote Support Localisation Section Disponibilité 15396 - Périodique Bibliothèque principale Documentaires Disponible Effect of nanosilica and Zno nanoparticles / Anabel Crespo Soler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 205, N° 4608 (05/2015)
[article]
Titre : Effect of nanosilica and Zno nanoparticles Type de document : texte imprimé Auteurs : Anabel Crespo Soler, Auteur ; N. Lardies Miaza, Auteur Année de publication : 2015 Article en page(s) : p. 14-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Charges (matériaux)
Formulation (Génie chimique)
Nanoparticules
Oxyde de zinc
Polyuréthanes
Résistance à l'abrasion
Résistance au rayonnement ultraviolet
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Revêtements en phase aqueuse:Peinture en phase aqueuse
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, commercial nano zinc oxide (nano-ZnO) and nanosilica (nano-SiO2) were employed as fillers to improve the properties of abrasion and UV resistance of waterborne polyurethane coatings. Various dispersion techniques were studied to prevent the aggregation of primary nanoparticles in the polyol mixture. The nanoparticles dispersion was studied by OM and SEM. Polyols containing nanoparticles were mixed with the suitable amount of isocyanate to obtain polyurethane water-based coatings.
The resultant polyurethane nanocomposite was characterised according to abrasion resistance (ASTM D 4060) and QUV resistance (ASTM D 4587). Abrasion resistance was improved by adding different percentages of nanosilica nanoparticles but no improvement was obtained regarding UV resistance. Nano-zinc oxide nanoparticles contribution enhanced neither abrasion nor UV resistance, maybe due to catalytic reaction of nano-ZnO over PUR mains.Note de contenu : - EXPERIMENTAL : Materials - Mixing systems
- CHARACTERISATION TECHNIQUES : Optical microscope - Scanning electron microscope (SEM) - Abrasion resistance - QUV ageing and colour measurement - Experimental - Preparation of nanocomposites PUR coatings
- RESULTS AND DISCUSSIONS : Dispersion methods - Scanning electron microscope (SEM) - Abrasion resistance - QUV and colour measurementEn ligne : https://drive.google.com/file/d/1VOD-7gC_gX5VxH1oHG2iE2Q1AvhK2Sey/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24041
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Code-barres Cote Support Localisation Section Disponibilité 17211 - Périodique Bibliothèque principale Documentaires Disponible Effect of a novel chemical treatment on the physico-thermal properties of sugarcane nanocellulose fiber reinforced epoxy nanocomposites / H. Mohit in INTERNATIONAL POLYMER PROCESSING, Vol. XXXV, N° 2 (05/2020)
[article]
Titre : Effect of a novel chemical treatment on the physico-thermal properties of sugarcane nanocellulose fiber reinforced epoxy nanocomposites Type de document : texte imprimé Auteurs : H. Mohit, Auteur ; V. Arul Mozhi Selvan, Auteur Année de publication : 2020 Article en page(s) : p. 211-220 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Canne à sucre et constituants
Caractérisation
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Composites à fibres -- Propriétés physiques
Composites à fibres -- Propriétés thermiques
Composites à fibres végétales
Epoxydes
Extraction (chimie)
Humidité -- Absorption:Eau -- Absorption
Morphologie (matériaux)
Nanoparticules
PorositéIndex. décimale : 668.4 Plastiques, vinyles Résumé : In the present investigation, a novel chemical treatment was introduced for the extraction of nanocellulose fibers from sugarcane bagasse and applied as reinforcement material to enhance the physical properties and thermal stability of epoxy nanocomposites. Epoxy nanocomposites with different weight fractions were fabricated using a wet layup process followed by furnace heating to remove the residual moisture content. The influence of surface modified sugarcane nanocellulose fiber loading on morphological (transmission electron microscope) properties of epoxy nanocomposites was investigated. The porosity and water absorption increase with the increment in fiber weight fraction for both treated and untreated nanocellulose fiber-epoxy composites. Among the various treatment processes, the alkali-treated fibers reinforced epoxy composites showed better thermal stability and water absorption resistance under 10 wt.% of nanocellulose fiber reinforcement. Note de contenu : - MATERIALS AND METHODS : Sugarcane fiber extraction - Composite fabrication - Composite characterization
- RESULTS AND DISCUSSION : Effect on physical properties - Effect on thermal properties - MorphologyDOI : https://doi.org/10.3139/217.3855 En ligne : https://drive.google.com/file/d/1HXrO7u2Gs3Fktbr9HH4OQAMIY_qaXRp-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34015
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Code-barres Cote Support Localisation Section Disponibilité 21674 - Périodique Bibliothèque principale Documentaires Disponible Effect of polyether soft segments on structure and properties of waterborne UV-curable polyurethane nanocomposites / Shengwen Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 3 (05/2015)
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PermalinkEffect of solvents and dispersants on polyol synthesis of V–ZrSiO4 nanopigment stable suspension for ink application / Hossein Heydari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
PermalinkEffect of structure-controlled aluminum silicate nanofiller on surface properties of emulsion coating films / Fumihiko Ohashi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
PermalinkEffect of titanium nitrate nanoparticles on optical properties of PVA-PEG blend for optoelectronics detectors / Musaab Khudhur Mohammed in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 6 (12/2022)
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PermalinkEffect on wear resistance of nanoparticles addition to a powder polyester coating through ball milling / Maria Fernandez-Alvarez in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 4 (07/2018)
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