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Titre : Icons of the modern era : Polyphthalamides for hybrid connections in metallic smartphone housings Type de document : texte imprimé Auteurs : Tamim Sidiki, Auteur ; Julie Liong, Auteur ; Michelle Seitz, Auteur ; Li-Dong Zheng, Auteur Année de publication : 2017 Article en page(s) : p. 20-23 Langues : Anglais (eng) Catégories : Acier inoxydable
Isolation électrique
Matériaux hybrides
Nanomoulage
Polyphthalamide
Smartphones
Titane
Transition vitreuseIndex. décimale : 668.4 Plastiques, vinyles Résumé : Nothing defines the current generation more than the smartphone. Premium, classy metal devices are the current trend. In order for the numerous integrated antennas to work notwithstanding the conductive housings, they must be electrically insulated against each other. Two newly developed polyphthalamides that join especially well with titanium and stainless steel alloys are suited for this purpose. Note de contenu : - Advantages and disadvantages of metal housings
- Glass housings
- Nano-molding as the joining technology of choice
- High-temperature plastic with highest glass transition temperature
- FIGURES : The antenna separation in the course of various iPhone generations - 2K. Nano-molding technology (NMT) creates strong connections without adhesives of primers. The process can be divided into three steps - 3. Overview of some application examples where metal-plastic composites were joined to each other in the NMT process. The process is used in aviation and aerospace, automotive engineering, and the electrical and electronics industry - 4. In a comparison of the bonding strength of various plastics on stainless steel after NMT processing, the new materials stand out with high values (Al=aluminum, SUS 304 and SUS 316 = steel alloys) - 5. In addition to the two polyphthalamides that were presented, DSM has other plastics for the NMT process in its portfolioEn ligne : https://drive.google.com/file/d/1Pn9RWuZtK6zb2gFDv9D2vU3oi90BsSZN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29675
in KUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 12 (12/2017) . - p. 20-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19448 - Périodique Bibliothèque principale Documentaires Disponible Impact of various Mg(OH)2 morphologies on hydrophobicity, mechanical, and physical properties of polyurethane nanocomposite / Zahra Rajabimashhadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
[article]
Titre : Impact of various Mg(OH)2 morphologies on hydrophobicity, mechanical, and physical properties of polyurethane nanocomposite Type de document : texte imprimé Auteurs : Zahra Rajabimashhadi, Auteur ; Rahim Naghizadeh, Auteur ; Ashkan Zolriasatein, Auteur ; Sonia Bagheri, Auteur ; Claudio Mele, Auteur ; Carola Espositio Corcione, Auteur Année de publication : 2023 Article en page(s) : p. 1815-1834 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Dureté (matériaux)
Hydrophobie
Hydroxyde de magnésiumL'hydroxyde de magnésium est un composé inorganique de formule Mg(OH)2. Ce sel se présente sous la forme d'une poudre pratiquement insoluble dans l'eau. Le « lait de magnésie » est une solution saturée d'hydroxyde de magnésium, d'aspect laiteux. Sa forme minérale naturelle est connue sous le nom de brucite.
L'hydroxyde de magnésium est utilisé en thérapeutique comme antiacide (pour calmer les brûlures d'estomac) et comme laxatif.
Matériaux hybrides
Polyuréthanes
Revêtements organiques
Revêtements poudreIndex. décimale : 667.9 Revêtements et enduits Résumé : Polyurethane (PU) is one of the best polymer coatings due to its wide range of advantages such as easy fabrication, lightness, non-toxicity, durability, adhesion, flexibility, and strength. However, some of its drawbacks make it a suitable choice for the manufacturing of nanocomposites to enhance its properties. Hydrophobicity and flame retardancy are two of the most crucial characteristics of a polymer nanocoating. Magnesium hydroxide (MH), with its ability to be produced in a multitude of morphologies and exceptional properties, especially in flame retardancy, has always attracted the interest of researchers. One of the best methods for synthesizing high-purity, controlled-size, and controlled-shape nanoparticles is the hydrothermal technique. In this paper, magnesium chloride and sodium hydroxide were utilized as raw materials to synthesize four different morphologies of MH, such as plate, flake, spherical, and disk, functionalized using 3-Aminopropyl triethoxysilane (APTES). In the following, PU nanocomposites were fabricated by drop casting method including 3 % w.t. of different synthesized MH. The influence of each morphology on different properties of PU/Mg(OH) was then investigated using different analyses such as spectroscopy, mechanical, and hydrophobicity tests. The observations indicated that different surface topography would result from the presence of nanoparticles with various morphologies on the nanocomposite’s surface. Extremely high water contact angles were attained as a result of the surface roughness, revealing the super hydrophobic behavior of the produced nanocoatings. Also, the presence of MH in PU matrix improved the mechanical properties of the nanocomposite, depending on the aspect ratio and particle size.: Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS : Nano-MH synthesis - PU/Mg(OH)2 fabrication - Characterization
- RESULTS AND DISCUSSION : Nano-MH powder characterization - PU/Mg(OH)2 nanocomposite
- Table 1 : Materials used for MH synthesis
- Table 2 : Materials used for PU/Mg(OH)2 fabrication
- Table 3 : The chemical information of the PU/Mg(OH)2 nanocomposites
- Table 4 : Synthesiszed MH powder propertiesDOI : https://doi.org/10.1007/s11998-023-00797-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00797-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40163
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1815-1834[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible In situ polymerization of PET in the presence of pristine and organo-modified clays / Babak Esmaeili in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 3 (07/2013)
[article]
Titre : In situ polymerization of PET in the presence of pristine and organo-modified clays Type de document : texte imprimé Auteurs : Babak Esmaeili, Auteur ; C. Dubois, Auteur ; P. J. Carreau, Auteur ; M.-C. Heuzey, Auteur Année de publication : 2013 Article en page(s) : p. 331-340 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Argile
Cloisite
Matériaux hybrides
Microscopie électronique à balayage
Montmorillonite
Oligomères
Polycondensation
Polyéthylène téréphtalate
Polymérisation
SilicatesIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this work two types of montmorillonite, a pristine and an organo-modified clay (Cloisite 30B), were employed to produce (polyethylene terephthalate)-based nanocomposites via in situ polymerization. Using water as an intermediate medium, a stable dispersion of pristine clay in ethylene glycol was achieved. However, after polymerization, no significant gain was obtained in terms of delamination of silicate platelets. The polycondensation reaction when using Cloisite 30B was carried out at a temperature as low as 250 °C in order to retain a considerable portion of the organo-modifier. The results showed that Cloisite 30B was successfully intercalated by the polymer chains, resulting in a d-spacing increase from 1.9 nm to about 3.6 nm. Although some mono and double silicate layers were observed in microscopy images, the major part of the organoclay remained in a tactoid intercalated form. Sampling during the polycondensation reaction revealed that, in this process, clay was first swelled efficiently by the monomer, and this structure was preserved in the early stage of polycondensation. However, the silicate platelets collapsed with time as the polycondensation progressed and larger molecular weight oligomers were formed. An investigation on the type of impeller used in the polymerization process showed that a slight improvement was achieved in terms of aggregate size and distribution when the anchor impeller was replaced by a helical one. Note de contenu : - EXPERIMENTAL : Materials - Experimental set-up - Insitu polymerization procedure
- CHARACTERIZATION
- RESULTS AND DISCUSSION : Incorporation of pristine clay in the polymerization process - Incorporation of cloisite 30B in the polymerization process - The effect of impellerDOI : 10.3139/217.2760 En ligne : https://drive.google.com/file/d/1NKVQI71S9dtRtWmF9aqWsAS0geFf6Wxb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19023
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 3 (07/2013) . - p. 331-340[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15238 - Périodique Bibliothèque principale Documentaires Disponible In vitro bactericidal effect of ultrasonically sol–gel-coated novel CuO/TiO2/PEG/cotton nanocomposite for wound care / Arman Khani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 3 (05/2017)
[article]
Titre : In vitro bactericidal effect of ultrasonically sol–gel-coated novel CuO/TiO2/PEG/cotton nanocomposite for wound care Type de document : texte imprimé Auteurs : Arman Khani, Auteur ; Nasrin Talebian, Auteur Année de publication : 2017 Article en page(s) : p. 651-663 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens
Citrique, AcideL'acide citrique est un acide alpha hydroxylé de formule C6H8O7.
Il joue un rôle central dans le métabolisme de tous les organismes vivants et tient son nom de son origine; le citron.
L'acide citrique est biodégradable et n'est pas toxique pour l'homme ni pour l'environnement. Cependant, comme tout acide, il est irritant et peut provoquer des brûlures s'il entre en contact prolongé avec des muqueuses.
À pH physiologique, il est présent sous forme de sa base conjuguée, le citrate, qui est un chélateur de l'ion calcium dans le sang.
CotonLe coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles).
Dioxyde de titane
Matériaux hybrides
Nanoparticules
Oxydes de cuivre
Polyéthylène glycol
Sol-gel, Procédé
Sonochimie
Surfaces fonctionnelles
Textiles et tissus à usages médicaux
Textiles et tissus à usages techniques
Traîtements de surface
UltrasonsIndex. décimale : 667.9 Revêtements et enduits Résumé : Protection against bacterial contamination remains a demand for healthcare textiles such as wound dressings to reduce or eliminate hospital-acquired infections related to antibiotic-resistant bacteria. We report herein a simple and straightforward in situ approach to deposit copper oxide and titanium oxide nanoparticles onto cotton fabric using a sonochemical-mediated sol–gel method. Modification of the cotton surface was achieved by incorporation of citric acid (CA) and polyethylene glycol (PEG) to improve the attachment of the nanoparticles and reduce the attachment of bacteria to the cotton surface, respectively. The resultant cotton fabric was used against Escherichia coli as a Gram-negative bacterium and Staphylococcus aureus as a Gram-positive bacterium in dark condition as an in vitro model for treatment of bacterial wound infection. The effects of different treatment parameters including duration and frequency of ultrasonic irradiation, surface modification with PEG and/or CA, and cotton chemical composition with different metal oxide molar ratios on the antibacterial activity of the treated cotton fabric were studied. All treated cotton fabrics showed antibacterial activity, with higher efficiency for those coated with CuO or CuO/TiO2 (1:1 molar ratio) among the single metal oxide and composite-modified cotton fibers, respectively. Our results show that such functionalized cotton fibers could actively fight the spread of bacterial infections by preventing bacterial adhesion, enabling more efficient bonding, and ultrasonically promoting generation of nanoparticles and their strong adhesion to the fabric surface. Note de contenu : - EXPERIMENTAL : Materials - Sol preparation and application onto cotton fabric - Characterization - Microbiological tests - Agar diffusion test - Dynamic shake tests - Washing durability test
- RESULTS AND DISCUSSION : Structural and morphological characterization - Antibacterial activityDOI : 10.1007/s11998-016-9870-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9870-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28573
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 3 (05/2017) . - p. 651-663[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18899 - Périodique Bibliothèque principale Documentaires Disponible Influence of alkali treatment and dune sand content on the properties of date palm fiber reinforced unsaturated polyester hybrid composites / Yazid Meftah in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 3-4 (08/2020)
[article]
Titre : Influence of alkali treatment and dune sand content on the properties of date palm fiber reinforced unsaturated polyester hybrid composites Type de document : texte imprimé Auteurs : Yazid Meftah, Auteur ; Masoud Tayefi, Auteur ; Fatma Fellouh, Auteur ; Houria Chouieur, Auteur ; Samira Maou, Auteur ; Ahmed Meghezzi, Auteur Année de publication : 2020 Article en page(s) : p. 161-167 Note générale : Bibliogr. Langues : Français (fre) Catégories : Caractérisation
Composites -- Propriétés mécaniques
Composites -- Propriétés physiques
Composites -- Propriétés thermiques
Composites à fibres végétales
Fibres de palmier dattier
Humidité -- Absorption:Eau -- Absorption
Matériaux hybrides
Polyesters insaturésLes résines de polyesters insaturés (UP) sont obtenues par polycondensation
d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique.
Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs.
Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable.
Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement
dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile.
Sable
Thermogravimétrie
Traîtements de surfaceIndex. décimale : 668.4 Plastiques, vinyles Résumé : The effects of alkali treatment and dune sand (DS) addition on the mechanical, morphological, thermal and water absorption behavior of date palm fiber (DPF) reinforced unsaturated polyester (UP) composites were investigated. The composites were synthesized by hand lay-up method with 10, 20, and 30 wt% of both treated and untreated date palm fiber (TDPF/DPF). Furthermore, composites having 10, 20 and 30 wt% of untreated date palm fiber and dune sand (both of them were in equal wt%) were also fabricated. Alkali treatment improved the tensile strength, tensile modulus, flexural strength and flexural modulus of the resulting composites. Scanning electron microscopy (SEM) revealed the better interfacial interaction of treated date palm fibers/UP composites. Thermogravimetric analysis (TGA) showed that thermal stability, and degradation temperature of treated DPF composites were best over the untreated DPF composites. Water absorption test indicated the decreasing of hydrophilic character of the filler after treatment with sodium hydroxide (NaOH). Overall analysis represented that satisfactorily improved physical properties of UP for various engineered and hi-tech applications were obtained with 10 wt% fillers loading (5 wt% date palm fiber and 5 wt% dune sand particles). Note de contenu : - MATERIALS AND METHODS : Materials - Surface modification of date palm fibers with NaOH - Fabrication of composites - Characterization
- RESULTS AND DISCUSSION : Mechanical properties - Morphological properties - Thermogravimetric (TGA) and differential thermogravimetric (DTGA) analysis - Water absorption
- Table 1 : Physical characteristics of dune sand
- Table 2 : Chemical composition of leaf date palm fibers
- Table 3 : Thermal properties of different UP based compositesDOI : https://doi.org/10.18280/rcma.303-406 En ligne : https://www.iieta.org/download/file/fid/39667 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37641
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 30, N° 3-4 (08/2020) . - p. 161-167[article]Influence of iron and nickel on the microwave absorption and other functional properties of nanographite-based nanocomposite paints / Anjali Prakash in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
PermalinkInfluence of melt-mixing process conditions on mechanical performance of organoclay/fluoroelastomer nanocomposites / M. Khajehpour in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 1 (03/2016)
PermalinkInfluence of processing conditions on the preparation of clay-based nanocomposites by twin-screw extrusion / Bruno Vergnes in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 5 (11/2019)
PermalinkInfluence of radical photoinitiator content on UV curing process and UV-cured hybrid sol–gel films / Anaïs Even in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
PermalinkInfluence du procédé de mise en forme de films nano-composites poly(oxyéthylène)/nano-cristaux de cellulose / N. El Kissi in RHEOLOGIE, Vol. 27 (06/2015)
PermalinkInnovative high-performance hybrid yarns made from recycled carbon fibers for lightweight structures / Anwar Abdkader in CHEMICAL FIBERS INTERNATIONAL, Vol. 67, N° 3 (09/2017)
PermalinkInnovative high-performance hybrid yarns made from recycled carbon fibers for lightweight structures / Anwar Abdkader in CHEMICAL FIBERS INTERNATIONAL, (10/2018)
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PermalinkInorganic-organic hybrid sol-gel coatings / Brijesh Mishra in PAINTINDIA, Vol. LXIV, N° 10 (10/2014)
PermalinkInorganic/organic nanocomposite coatings : The next step in coating performance / Mark D. Soucek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 3, N° 2 (04/2006)
PermalinkInternational Symposium on Advanced Fiber/Textile Science and Technology (ISAF) 2010 in Fukui / Congrès: International Symposium on Advanced Fiber/Textile Science and Technology (ISAF) (University of Fukui, Fukui, Japan) / 2010
PermalinkInvestigating thermal stability and flame retardant properties of synthesized halloysite nanotubes (HNT)/ethylene propylene diene monomer (EPDM) nanocomposites / S. Azarmgin in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 1 (03/2015)
PermalinkInvestigation of EMI and UV-IR shielding properties of wool and cotton/elastane nanocomposite fabrics / Ilhami Ilhan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
PermalinkInvestigation of the wettability, anticorrosion, and accelerated weathering behaviors of siloxane-modified acrylic resin and functionalized graphene nanocomposite coatings on LY12 aluminum alloy / Paul C. Uzoma in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
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