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Tribological and mechanical performance of epoxy reinforced by fish scales powder / Kifah Ghazi Ali in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 3 (06/2022)
[article]
Titre : Tribological and mechanical performance of epoxy reinforced by fish scales powder Type de document : texte imprimé Auteurs : Kifah Ghazi Ali, Auteur ; Ayad Abid Muhmmed, Auteur ; Nabil Kadhim Taieh, Auteur ; Mohanad Kadhim Mejbel, Auteur Année de publication : 2022 Article en page(s) : p. 149-155 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse structurale (ingénierie)
Caractérisation
Composites -- Propriétés mécaniques
Epoxydes
Essais (technologie)
Essais dynamiques
Matériaux -- Renforcement
Poudre d'écailles de poisson
Tribologie (technologie)Index. décimale : 668.4 Plastiques, vinyles Résumé : The study was conducted to use fish scales powder as animal biomass to prepare epoxy composites. Fish scales powder is beneficial in reducing environmental pollutants. The fish scales powder was added to the epoxy matrix for improving the interfacial bonding between the scales and the epoxy matrix. However, a direct method was used to prepare epoxy composites, and samples were cut according to ASTM standards for mechanical and tribological tests. Interfacial interaction between the fish scales powder and epoxy was investigated by FTIR and SEM. It was found that the fish scales powder contents affect the mechanical properties and tribological behaviour of produced composites. Compared to pure epoxy, the load of 10 wt.% fish scales powder increased the tensile strength by 16.0%. As well as, the coefficient of friction was reduced by 16.0% and wear resistance was enhanced by 48.58%. The improvements in the performance of composites are contributed to the hydrogen bonding formed between fish scales powder and epoxy matrix. Note de contenu : - EXPERIMENTAL : Materials - Preparation of fish scales powder /epoxy composites - Characterization and testing
- RESULTS AND DISCUSSION : Structure analysis of the fish scales powder and its composite - Reinforcing analysis - Tensile test - Tribological testDOI : https://doi.org/10.18280/rcma.320306 En ligne : https://www.iieta.org/download/file/fid/77310 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38207
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 32, N° 3 (06/2022) . - p. 149-155[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23830 - Périodique Bibliothèque principale Documentaires Disponible A tunable controlled-release urea fertilizer coated with a biodegradable polyurethane-nanoclay composite layer / Kannika Sitthisuwannakul in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : A tunable controlled-release urea fertilizer coated with a biodegradable polyurethane-nanoclay composite layer Type de document : texte imprimé Auteurs : Kannika Sitthisuwannakul, Auteur ; Kanittha Kamonchaivanich, Auteur ; Thanakorn Wirunmongkol, Auteur ; Pennapa Muthitamongkol, Auteur ; Wiyong Kangwansupamonkon, Auteur Année de publication : 2023 Article en page(s) : p. 635-646 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Argile
Biodégradation
Caractérisation
Coefficient de diffusionUn coefficient de diffusion est une grandeur caractéristique du phénomène de diffusion de la matière. Le coefficient de diffusion mesure le rapport entre le flux molaire dû à la diffusion moléculaire, et le gradient de concentration de l'espèce chimique considérée (ou, plus généralement, de la variable d'effort entraînant cette diffusion), comme formulé par la loi de Fick.
Engrais organiques
Nanoparticules
Polyuréthanes
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés physiques
Revêtements organiques
Système de libération contrôlée (technologie)
UréeIndex. décimale : 667.9 Revêtements et enduits Résumé : To minimize a loss of urea to the environment and also control a release activity, a tunable and controlled-release urea fertilizer (TCRF) was created. Composite coating layers of the TCRF were synthesized using a composite of nanoclay (B27), and a linseed oil-modified polyurethane resin (BURNOCK® UL65). The concentration of B27 nanoclay was varied from 0, 3, 5 and 10 wt% and called TCRF, TCRF-3, TCRF-5 and TCRF-10, respectively. Firstly, nanocomposite free-standing films (NFs) with 0, 0.5, 1, 3, 5 and 10 wt% of B27 were synthesized and tested to demonstrate the mechanical properties of the coating layer. When the B27 clay content increased, the Young’s modulus and yield strength were increased. On the other hand, the elongation at break was decreased. NFs were also characterized by XRD and TEM, which showed a partial exfoliated nanocomposite character. The water contact angle measurement showed that all NFs had hydrophobicity properties (87°–90° contact angle). Moreover, the microorganism degradability test showed that the NFs degraded at 37 ± 2°C and 58 ± 2°C in manure, a common agriculture media. The study on coated urea fertilizers found that the thickness of all TCRFs layers is around 52–54 μm. The nitrogen release profiles of the TCRF at 60°C in water as a predictive analytic model were investigated using an elemental analyzer that is a pathway analysis method to understand the release profiles of the TCRFs. All release profiles fitted well with the sigmoidal model, which was suitable for a common plant growth. The profiles gave diffusion coefficients (D) in the range of 49–69 μm2 h−1 and presented an inverse trend to the yield strength of the NFs. The investigation demonstrated that B27 played an important role in tuning the strength of the coating layers that affected the urea release to the plants and the environment. Note de contenu : - MATERIALS AND METHODS : Chemicals - Nanocomposite free-standing films (NFS) preparation - Biodegradability analysis of the NF - Tunable controlled-release urea fertilizer (TCRF) preparation - Characterizations - Nitrogen release test and kinetic study of TCRF
- RESULTS AND DISCUSSION : Swelling performance and the characteristics of the nanoclays - Chemical and physical properties of the NF - Biodegradable ability - Nitrogen release mechanism
- Table 1 : Mechanical properties and contact angles of NF nanocomposite films
- Table 2 : The percentages of biodegradation via the conversion yield of carbon in the sample to carbon dioxide according to the ASTM 5338–98 test method
- Table 3 : Kinetic parameters and diffusion coefficients of various types of TCRFDOI : https://doi.org/10.1007/s11998-022-00688-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00688-w.pdf?pdf=button Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39308
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 635-646[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Tuning of final performances of soybean oil-based polymer nanocomposites : effect of styryl/oil functionalized intercalant of montmorillonite reinforcer in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 2 (05/2015)
[article]
Titre : Tuning of final performances of soybean oil-based polymer nanocomposites : effect of styryl/oil functionalized intercalant of montmorillonite reinforcer Type de document : texte imprimé Année de publication : 2015 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères
Caractérisation
Charges (matériaux)
Epoxydes
Huile de soja
Matériaux hybrides
Matériaux hybrides -- Propriétés mécaniques
Matériaux hybrides -- Propriétés thermiques
Monomères
Montmorillonite
Polyaddition
Styrène
StyryleLe terme styryle désigne un groupe fonctionnel aromatique de formule brute C6H5-CH=CH–.Index. décimale : 668.4 Plastiques, vinyles Résumé : Bio-based polymeric nanocomposites were prepared via polymerization of a monomer mixture of acrylated epoxidized soybean oil (AESO) and styrene in the presence of organophilic montmorillonite (MMT) clay by in-situ free-radical polymerization technique. MMT clay was rendered organophilic by a styryl/oil functionalized intercalant which is compatible with the two matrices and able to participate in the polymerization/crosslinking reaction. The presence of styryl group in the intercalant is also thought to be an original solution to the drawback mentioned in the literature arising from higher amount of small styrene monomer molecules in the clay galleries than larger AESO molecules at high clay loadings. The current design of the intercalant is expected to allow polymer molecules grown from both AESO and styrene monomers inside the clay galleries and also from edges/surfaces of the silicate layers. In this study, a special attention was paid to the enhancement of both thermal and mechanical properties of AESO-based nanocomposites via usage of the compatible and reactive intercalant for MMT modification. The resultant nanocomposites were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The effect of increased nanoclay loading in thermal and mechanical properties was investigated by thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The nanocomposite materials exhibited improved thermal stability and dynamic mechanical properties as compared to neat polymer. The nanocomposite with exfoliation dominant structural morphology showed the highest storage modulus around Tg which is about 480% higher than that of neat AESOPS, even with a clay content as low as 3 wt%. Note de contenu : - EXPERIMENTAL : Materials - Modification of NaMMT with cocoamine salt - Preparation of nanocomposites - Characterization
- RESULTS AND DISCUSSION : Clay modification - Properties of the nanocompositesDOI : 10.3139/217.3006 En ligne : https://drive.google.com/file/d/1PF4nWitb_srev0vLCDa8wFgN-aVnurtC/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23907
in INTERNATIONAL POLYMER PROCESSING > Vol. XXX, N° 2 (05/2015)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17180 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Turning old into new : A robust continuous process for the chemical recycling of polystyrene Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Philipp Schäfer, Auteur ; Nils Dauber, Auteur ; Martin Facklam, Auteur Année de publication : 2020 Article en page(s) : p. 40-43 Langues : Anglais (eng) Catégories : Caractérisation
Dépolymérisation
Extrusion réactive
Matières plastiques -- Recyclage
Polystyrène
Recyclage chimiqueIndex. décimale : 668.4 Plastiques, vinyles Résumé : Due to their good feed characteristics and self-cleaning properties, twin-screw extruders enable even contaminated post-consumer polystyrene to be depolymerized continuously and efficiently. This opens up a promising recycling route in terms of industrial implementation via renewed polymer synthesis to produce plastic granules with a quality approaching that of virgin material. Note de contenu : - Chemical recycling of polystyrene
- Continuous depolymerization of polystyrene in a twin-screw extruder
- Influence of screw speed and material composition
- Figure : Continuous process in a twin-screw extruder: For industrial implementation of chemical recycling of polystyrene, a reactor technology is required that allows high throughput rates and also processes heavily contaminated post-consumer material continuously with high process stability
- Fig. 1 : Depolymerization mechanism of polystyrene to styrene (in brackets: boiling temperatures)
- Fig. 2 : Characterization of polymer degradation based on melt mass flow rate and glass transition temperature as a function of material composition and screw speed
- Fig. 3 : Condensate yield as a function of material composi-tion and screw speed
- Fig. 4 : Composition of the condensates depending on the input materialsEn ligne : https://drive.google.com/file/d/1UyWGZNryR3e0e1kj_8XOAHTRMYqDmYyF/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34828
in KUNSTSTOFFE INTERNATIONAL > Vol. 110, N° 9 (2020) . - p. 40-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22367 - Périodique Bibliothèque principale Documentaires Disponible Two-component UV-curable waterborne CO2-based polyurethane dispersion with outstanding flexibility / Zhu Ding in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
[article]
Titre : Two-component UV-curable waterborne CO2-based polyurethane dispersion with outstanding flexibility Type de document : texte imprimé Auteurs : Zhu Ding, Auteur ; Jiahui Chen, Auteur ; Zonglin He, Auteur ; Chaozhi Wang, Auteur ; Hualin Li, Auteur ; Zhenhong Huang, Auteur ; Baohua Liu, Auteur ; Lina Song, Auteur Année de publication : 2023 Article en page(s) : p. 1569-1578 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acidité
Caractérisation
Diols
Dioxyde de carbone
Polycarbonate de propylèneLe carbonate de polypropylène (PPC), un copolymère d'anhydride carbonique et d'oxyde de propylène, est un thermoplastique. Des catalyseurs tels que le glutarate de zinc sont utilisés dans sa polymérisation.
Polyuréthanes
Résistance chimique
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements bi-composant
Revêtements en phase aqueuse -- Séchage sous rayonnement ultraviolet
Souplesse (mécanique)
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of two-component UV-curable waterborne CO2-based polyurethane dispersions (UV-PUDs) with excellent flexibility and mechanical strength were synthesized from poly(propylene carbonate) diol (PPCD), isophorone diisocyanate (IPDI), 2,2-bis(hydroxymethyl) propionic acid (DMPA), 2-hydroxyethyl acrylate (HEA), pentaerythritol triacrylate (PETA) and 1,4-butanediol (BDO). One component was UV-curable waterborne polyurethane terminated by HEA and PETA (molar ratio 1:1), and the other component was linear waterborne polyurethane. The content of the UV-curable component in UV-PUD was 15%, 30%, 45%, 60%, and 100% (weight content). The obtained cured films exhibited superior flexibility without loss of tensile strength, accompanied by excellent acid and alkali resistance. In particular, the dried UV-PUD films without curing showed good mechanical properties. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of UV-PUD - Preparation of UV-PUD film - Characterization
- RESULTS AND DISCUSSION : FTIR analysis - Effect of photoinitiator dosage on unsaturation conversion - Performances of UV-PUDs - Unsaturation conversions of UV-PUDs - Performances of UV-PUD cured films - Thermal properties
- Table 1 : Reactant proportion of UV-PUDs
- Table 2 : Performances of UV-PUDs
- Table 3 : Properties of UV-PUD cured films
- Table 4 : Absorption rates of UV-PUD cured films to various solvents
- Table 5 : Mechanical properties and chemicals resistance of UV-PUDs films
- Table 6 : TGA data of UV-PUD cured filmsDOI : https://doi.org/10.1007/s11998-023-00763-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00763-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39972
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1569-1578[article]Réservation
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