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A char stratification approach to characterization and quantitative thermal insulation performance of hydrocarbon intumescent coatings / Ying Zeng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
[article]
Titre : A char stratification approach to characterization and quantitative thermal insulation performance of hydrocarbon intumescent coatings Type de document : texte imprimé Auteurs : Ying Zeng, Auteur ; Claus Erik Weinell, Auteur ; Kim Dam-Johansen, Auteur ; Louise Ring, Auteur ; Søren Kiil, Auteur Année de publication : 2022 Article en page(s) : p. 1033-1043 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Borate de zinc
Caractérisation
Carbonisation
Hydrocarbures
Intumescence (chimie)
Métaux -- Revêtements protecteurs
Polyphosphate d'ammonium
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Résistance à la flamme
Revêtements multicouches
Rhéologie
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : To protect structural steel in the event of a hydrocarbon fire, epoxy-based intumescent coatings, which expand to form a multicellular char layer, are increasingly used. Consequently, to improve formulations and understand the performance of such coatings, it is of great industrial and scientific interest to establish relationships between the char properties and the critical heating times of coated steel plates. In this work, a so-called Stratification Parameter (SP) that combines the relative expansions and insulation efficiencies of individual char layers (termed the sponge-like, the macroporous, and the compact phase, respectively), is introduced to characterize the properties of the multilayered intumescent coating char. An approximate linear relationship was revealed between the SP of the char and the fire-resistance performance (i.e., critical times to 400 and 550°C) of the intumescent coating. Furthermore, owing to the mapped-out exponential relationship between the dynamic viscosity minimum and the char appearance, it was discovered that the SP of the char can be effectively used to point out the required dynamic viscosity change of an intumescent coating to form a given char. Finally, results of thermogravimetric analyses suggest that constraining the coating mass loss during char degradation (to less than 28 wt% for the coatings of the present work) may prevent the formation of the less efficient sponge-like phase. The stratification methodology developed can be used to estimate expected thermal insulation properties of non-uniform hydrocarbon intumescent coating chars. Note de contenu : - EXPERIMENTAL SECTION : Coating materials and application - Fire-resistance performance - Rheological measurements of incipient intumescent chars - Thermal degradation of the intumescent coatings
Digital microscope recordings of char structure
- RESULTS AND DISCUSSION : Influence of the char expansion on the critical times - Stratification approach to thermal insulation of char layers - Parameters of interest for manipulating intumescent char properties
- Table 1 : Composition of the series of zinc borate intumescent coatings (in wt%), APP = ammonium polyphosphate, MEL = melamine, ZB = zinc borate. The level of zinc borate remains constant at 5 wt%
- Table 2 : Composition of the series of zinc borate-free intumescent coatings (in wt%), APP = ammonium polyphosphate, MEL = melamineDOI : https://doi.org/10.1007/s11998-021-00591-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00591-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38033
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 4 (07/2022) . - p. 1033-1043[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23574 - Périodique Bibliothèque principale Documentaires Disponible Effects of zinc borate on the flame retardancy performance of aluminum diethylphosphinate in polyamide-6 and its composites / O. Polat in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)
[article]
Titre : Effects of zinc borate on the flame retardancy performance of aluminum diethylphosphinate in polyamide-6 and its composites Type de document : texte imprimé Auteurs : O. Polat, Auteur ; Cevdet Kaynak, Auteur Année de publication : 2019 Article en page(s) : p. 59-71 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Borate de zinc
Caractérisation
Composites -- Analyse
Composites à fibres courtes
Compoundage
Diéthylphosphinate d'aluminium
Essais de comportement au feu
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Matières plastiques -- Additifs
Mélanges (chimie)
Moulage par injection-compression
Polyamide 6Index. décimale : 668.4 Plastiques, vinyles Résumé : In this study, the flame retardancy contribution of zinc borate when used together with a traditional flame retardant (aluminum diethylphosphinate compound) was investigated for neat polyamide-6 and for 15 wt% short glass fiber reinforced composite. Melt mixing with twin-screw extrusion was the compounding method while injection and compression molding were the shaping methods of specimens. Three different flammability tests (limiting oxygen index, UL-94 vertical burning, mass loss calorimetry) indicated that many flame retardancy parameters could be improved significantly by replacing a certain amount of aluminum diethylphosphinate with zinc borate. For example, using aluminum diethylphosphinate alone resulted in only 32 % suppression in the value of the peak heat release rate for neat polyamide-6, while it was 82 % (more than two-fold) when used together with zinc borate. It was revealed by evolved gas analyses, char analyses, x-ray diffraction and thermogravimetry that the main contribution of zinc borate to aluminum diethylphosphinate was in terms of a barrier mechanism via formation of additional boron phosphate inorganic content in the barrier layer. Note de contenu : - EXPERIMENTAL : Materials - Compounding and shaping - Characterization and testing
- RESULTS AND DISCUSSION : LOI and UL-94 - MLC - Mechanisms - TGA - XRD - EGA - Tensile testsDOI : 10.3139/217.3579 En ligne : https://drive.google.com/file/d/1bxFlifBjCLVFwbU5IPO4shrANrsITLt_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31912
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 1 (03/2019) . - p. 59-71[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20669 - Périodique Bibliothèque principale Documentaires Disponible A facile strategy to fabricate an intumescent fire-retardant coating with improved fire resistance and water tolerance for steel structure / Siqi Huo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : A facile strategy to fabricate an intumescent fire-retardant coating with improved fire resistance and water tolerance for steel structure Type de document : texte imprimé Auteurs : Siqi Huo, Auteur ; Chen Wang, Auteur ; Qinghua Hu, Auteur ; Shi Liu, Auteur ; Qi Zhang, Auteur ; Zhitian Liu, Auteur Année de publication : 2020 Article en page(s) : p. 1401–1411 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Borate de zinc
Caractérisation
Combustion
Encapsulation
IgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.
Intumescence (chimie)
Morphologie (matériaux)
Polyphosphate d'ammonium
Résistance à l'humidité:Résistance à l'eau
Revêtements -- Propriétés thermiques
Revêtements protecteurs
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : An intumescent fire-retardant coating (IFRC) with improved fire resistance and water tolerance was prepared in this work, resulting from the introduction of microcapsuled ammonium polyphosphate (MFAPP) and zinc borate (MFBZ). The as-prepared coating exhibited great fire resistance and smoke suppression. In the cone calorimetry test, adding only 6 wt% MFBZ dramatically reduced the peak heat release rate, total heat release, and total smoke release by ~ 23.4%, ~ 54.7%, and ~ 81.1%, respectively. In addition, the water resistance and thermal stability of the coatings were also characterized. The char yield of IFRC noticeably increased to 41.7%, indicating good high-temperature stability. Besides, the IFRC showed a water contact angle of 90.1° and maintained good structure and fire resistance after being soaked by water, indicating great water resistance. The enhanced performance portfolio was mainly due to the synergistic effects of ammonium polyphosphate, pentaerythritol, melamine, and zinc borate, and the hydrophobicity of melamine–formaldehyde resin (MF). This work offers an effective approach for the preparation of waterborne intumescent fire-retardant coatings with great fire resistance and water tolerance. Note de contenu : - EXPERIMENTAL : Materials - Sample preparation - Characterization
- RESULTS AND DISCUSSION : Characterization of MFBZ - Thermal properties of coatings - Fire resistance and combustion behaviors of coatings - Char morphology - Water resistance of coatingsDOI : https://doi.org/10.1007/s11998-020-00360-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00360-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34582
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1401–1411[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Modifying of UHMWPE fishing nets with layer-by-layer deposition method for antifouling properties / Gülsah Ekin kartal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 1 (01/2021)
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Titre : Modifying of UHMWPE fishing nets with layer-by-layer deposition method for antifouling properties Type de document : texte imprimé Auteurs : Gülsah Ekin kartal, Auteur ; Ayse Merih Sarusik, Auteur Année de publication : 2021 Article en page(s) : p. 163-171 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Borate de zinc
Caractérisation
Cationisation
Couches minces multicouches
Filets de pêche
Formation de film
Nanoparticules
Oxyde de cuivre
Oxyde de zinc
Polyéthylène à ultra haut poids moléculaire
Polyéthylèneimine
Revêtement monocouche
Revêtements antisalissuresIndex. décimale : 667.9 Revêtements et enduits Résumé : The nanoparticles-based, multilayer, nanocomposite films ZnO, Cu2O, zinc borate, and Econea® were fabricated on cationized ultra-high molecular weight polyethylene (UHMWPE) fishing nets using a layer-by-layer molecular self-assembly technique. For the cationic surface charge, the UHMWPE fishing nets were pretreated with polyethyleneimine using the dip-coating method. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to examine the nano-ZnO, Cu2O, zinc borate, and Econea® multilayer films deposited on the fishing nets. The fishing nets were placed in a fish farm located in the Aegean Sea for 6 months. The nano-Econea® films exhibited excellent antifouling activity against microorganisms. To evaluate the effect of the process on antifouling properties, physical tests of the nets were conducted before and after the nanoparticle treatment. The strength of the nets and fouling organisms were examined after the field study. Note de contenu : - EXPERIMENTAL : Materials - Cationization process - Nano-multilayer film formation - Characterization
- RESULTS AND DISCUSSION : Characterization - Fieldwork - Macro-organisms analysis - Solidity of nets - Strength and weight analysis
- Table 1 : Percentage of elemental contents of fishing nets deposited with 16-multilayer nanomaterial films
- Table 2 : Solidity of biofouled fishing nets
- Table 3 : Weighting results of fishing nets deposited with 16-multilayer nanomaterial films before and after the field
- Table 4 : Strength and elongation values of fishing nets deposited with 16-multilayer nanomaterial filmsDOI : https://doi.org/10.1007/s11998-020-00392-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00392-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35360
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 1 (01/2021) . - p. 163-171[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22605 - Périodique Bibliothèque principale Documentaires Disponible