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Corfu Fernando - One of the best experts on this subject based on the ideXlab platform.
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Prolonged high-grade metamorphism of supracrustal gneisses from Muhlig-Hofmannfjella, central Dronning Maud Land (East Antarctica)
'Elsevier BV', 2020Co-Authors: Elvevold Synnøve, Engvik Ane, Abu-alam Tamer, Myhre, Per Inge, Corfu FernandoAbstract:Accepted manuscript version, licensed CC BY-NC-ND 4.0. The bedrock of Mühlig-Hofmannfjella, central Dronning Maud Land in eastern Antarctica, is part of the high-grade Maud Belt and comprises a deep-seated metamorphic-plutonic complex. The P-T-t evolution of anatectic supracrustal gneisses has been recovered through a study of mineral assemblages, textural relationships and U-Pb ID TIMS geochronology on zircon and monazite followed by pseudosection modelling. Peak conditions reached granulite facies conditions (T ≥ 810–820 °C) at moderate crustal depths (P = ca. 8 kbar) and resulted in partial Melting. Peak-pressure conditions were followed by isothermal decompression at elevated temperatures. After exhumation to crustal levels of about 4–5 kbar, the area underwent a final near-isobaric cooling, which is documented by a secondary growth of garnet. Zircons indicate a period of growth at 570–566 Ma, whereas monazite ages range from 610 to 525 Ma. A likely heat source for the granulite facies metamorphism is decay of radioactive heat-producing elements in the core of the orogen. The combined geochronology and metamorphic data indicate a prolonged, clockwise P-T path, which reflects collision and formation of a long-lived orogenic plateau
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Prolonged high-grade metamorphism of supracrustal gneisses from Muhlig-Hofmannfjella, central Dronning Maud Land (East Antarctica)
'Elsevier BV', 2020Co-Authors: Elvevold Synnøve, Engvik Ane, Abu-alam Tamer, Myhre, Per Inge, Corfu FernandoAbstract:The bedrock of Mühlig-Hofmannfjella, central Dronning Maud Land in eastern Antarctica, is part of the high-grade Maud Belt and comprises a deep-seated metamorphic-plutonic complex. The P-T-t evolution of anatectic supracrustal gneisses has been recovered through a study of mineral assemblages, textural relationships and U-Pb ID TIMS geochronology on zircon and monazite followed by pseudosection modelling. Peak conditions reached granulite facies conditions (T ≥ 810–820 °C) at moderate crustal depths (P = ca. 8 kbar) and resulted in partial Melting. Peak-pressure conditions were followed by isothermal decompression at elevated temperatures. After exhumation to crustal levels of about 4–5 kbar, the area underwent a final near-isobaric cooling, which is documented by a secondary growth of garnet. Zircons indicate a period of growth at 570–566 Ma, whereas monazite ages range from 610 to 525 Ma. A likely heat source for the granulite facies metamorphism is decay of radioactive heat-producing elements in the core of the orogen. The combined geochronology and metamorphic data indicate a prolonged, clockwise P-T path, which reflects collision and formation of a long-lived orogenic plateau
Camila Barreneche - One of the best experts on this subject based on the ideXlab platform.
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effect of d mannitol polymorphism in its thermal energy storage capacity when it is used as pcm
Solar Energy, 2013Co-Authors: Falguni Sheth, Ines A Fernandez, Camila Barreneche, Luisa F. CabezaAbstract:The main objective of this paper is to study the possible use of D-mannitol as phase change material (PCM) for thermal energy storage. PCM are materials that have high phase change enthalpy and this thermophysical property gives them the ability to store energy as latent heat. D-mannitol is a material which has different morphological phases (polymorphism); here were studied b-form and d-form. Different polymorphic forms produce changes on Melting point of D-mannitol. For this reason it is necessary to establish a suitable working temperature range for the use of D-mannitol as phase change material. The thermal characterization was performed with DSC analysis using 0.5 K min-1 slow-dynamic method. Polymorphism analysis of D-mannitol was analyzed to associate the thermal behavior obtained by DSC with a specific polymorphic phase. D-mannitol presented three different thermal behaviors: the first one had a Melting Peak at 167 oC, the second was a double Melting Peak at 155 oC and 166 oC, and the third a single Peak at 155 oC. Due to irregular results, two working range were studied and through the thermal characterization, it was possible to define a working range where Dmannitol could be used as PCM for energy storage: this range is between 135 and 175 oC. Furthermore, it was possible to differentiate two crystalline phases of D-mannitol applying FT-IR analysis and to link them with thermal behavior observed in DSC. The percentage of times each thermal behavior is observed in DSC analysis was calculated. d-form is obtained 15.8% of analyzed cycles, the b-form appears 44.7% of times, and an intermediate transition between the two phases is found 39.5% of cycles.
Alessandro Pegoretti - One of the best experts on this subject based on the ideXlab platform.
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thermo mechanical behavior of novel wood laminae thermoplastic starch biodegradable composites with thermal energy storage release capability
Frontiers in Materials, 2019Co-Authors: Andrea Dorigato, Giulia Fredi, Alessandro PegorettiAbstract:For the first time, multifunctional fully biodegradable composites combining structural and thermal energy storage/release capabilities were prepared and thermo-mechanically characterized. At this scope, thin beech laminae impregnated with a phase change material (PCM) represented by poly(ethylene glycol) (PEG) were interleaved with thin foils of thermoplastic starch (TPS) and consolidated by hot pressing. From scanning electron microscopy it was observed that a certain amount of PEG (about 11 wt% of the total laminate) remained entrapped within the wood pores, negatively affecting the interfacial adhesion between wood laminae and TPS foils. The presence of PEG stabilized in the wood laminae was confirmed by differential scanning calorimetry tests, in which a specific Melting enthalpy of 27.4 J/g was detected with a Melting Peak at 55 °C. Wood permeation with PEG was responsible of an increase of the dynamic moduli E’ and E’’, as well as of the tensile and Charpy impact strength of the laminates. Therefore, this paper highlighted the possibility to develop multifunctional fully biodegradable composites capable to combine structural and thermal energy storage properties, in which the selected PCM positively contributed to the mechanical behaviour of the laminates.
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Thermo-Mechanical Behavior of Novel Wood Laminae-Thermoplastic Starch Biodegradable Composites With Thermal Energy Storage/Release Capability
Frontiers Media S.A., 2019Co-Authors: Andrea Dorigato, Giulia Fredi, Alessandro PegorettiAbstract:For the first time, multifunctional fully biodegradable composites combining structural and thermal energy storage/release capabilities were prepared and thermo-mechanically characterized. Within this scope, thin beech laminae impregnated with a phase change material (PCM) represented by poly(ethylene glycol) (PEG) were interleaved with thin foils of thermoplastic starch (TPS) and consolidated by hot pressing. From scanning electron microscopy, it was observed that a certain amount of PEG (about 11 wt% of the total laminate) remained entrapped within the wood pores, negatively affecting the interfacial adhesion between wood laminae and TPS foils. The presence of PEG stabilized in the wood laminae was confirmed by differential scanning calorimetry tests, in which a specific Melting enthalpy of 27.4 J/g was detected with a Melting Peak at 55°C. Wood permeation with PEG was responsible for an increase of the dynamic moduli E′ and E″, as well as of the tensile and Charpy impact strength of the laminates. Therefore, this paper highlighted the possibility of developing multifunctional fully biodegradable composites capable of combining structural and thermal energy storage properties, in which the selected PCM positively contributed to the mechanical behavior of the laminates
Luisa F. Cabeza - One of the best experts on this subject based on the ideXlab platform.
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effect of d mannitol polymorphism in its thermal energy storage capacity when it is used as pcm
Solar Energy, 2013Co-Authors: Falguni Sheth, Ines A Fernandez, Camila Barreneche, Luisa F. CabezaAbstract:The main objective of this paper is to study the possible use of D-mannitol as phase change material (PCM) for thermal energy storage. PCM are materials that have high phase change enthalpy and this thermophysical property gives them the ability to store energy as latent heat. D-mannitol is a material which has different morphological phases (polymorphism); here were studied b-form and d-form. Different polymorphic forms produce changes on Melting point of D-mannitol. For this reason it is necessary to establish a suitable working temperature range for the use of D-mannitol as phase change material. The thermal characterization was performed with DSC analysis using 0.5 K min-1 slow-dynamic method. Polymorphism analysis of D-mannitol was analyzed to associate the thermal behavior obtained by DSC with a specific polymorphic phase. D-mannitol presented three different thermal behaviors: the first one had a Melting Peak at 167 oC, the second was a double Melting Peak at 155 oC and 166 oC, and the third a single Peak at 155 oC. Due to irregular results, two working range were studied and through the thermal characterization, it was possible to define a working range where Dmannitol could be used as PCM for energy storage: this range is between 135 and 175 oC. Furthermore, it was possible to differentiate two crystalline phases of D-mannitol applying FT-IR analysis and to link them with thermal behavior observed in DSC. The percentage of times each thermal behavior is observed in DSC analysis was calculated. d-form is obtained 15.8% of analyzed cycles, the b-form appears 44.7% of times, and an intermediate transition between the two phases is found 39.5% of cycles.
Elvevold Synnøve - One of the best experts on this subject based on the ideXlab platform.
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Prolonged high-grade metamorphism of supracrustal gneisses from Muhlig-Hofmannfjella, central Dronning Maud Land (East Antarctica)
'Elsevier BV', 2020Co-Authors: Elvevold Synnøve, Engvik Ane, Abu-alam Tamer, Myhre, Per Inge, Corfu FernandoAbstract:Accepted manuscript version, licensed CC BY-NC-ND 4.0. The bedrock of Mühlig-Hofmannfjella, central Dronning Maud Land in eastern Antarctica, is part of the high-grade Maud Belt and comprises a deep-seated metamorphic-plutonic complex. The P-T-t evolution of anatectic supracrustal gneisses has been recovered through a study of mineral assemblages, textural relationships and U-Pb ID TIMS geochronology on zircon and monazite followed by pseudosection modelling. Peak conditions reached granulite facies conditions (T ≥ 810–820 °C) at moderate crustal depths (P = ca. 8 kbar) and resulted in partial Melting. Peak-pressure conditions were followed by isothermal decompression at elevated temperatures. After exhumation to crustal levels of about 4–5 kbar, the area underwent a final near-isobaric cooling, which is documented by a secondary growth of garnet. Zircons indicate a period of growth at 570–566 Ma, whereas monazite ages range from 610 to 525 Ma. A likely heat source for the granulite facies metamorphism is decay of radioactive heat-producing elements in the core of the orogen. The combined geochronology and metamorphic data indicate a prolonged, clockwise P-T path, which reflects collision and formation of a long-lived orogenic plateau
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Prolonged high-grade metamorphism of supracrustal gneisses from Muhlig-Hofmannfjella, central Dronning Maud Land (East Antarctica)
'Elsevier BV', 2020Co-Authors: Elvevold Synnøve, Engvik Ane, Abu-alam Tamer, Myhre, Per Inge, Corfu FernandoAbstract:The bedrock of Mühlig-Hofmannfjella, central Dronning Maud Land in eastern Antarctica, is part of the high-grade Maud Belt and comprises a deep-seated metamorphic-plutonic complex. The P-T-t evolution of anatectic supracrustal gneisses has been recovered through a study of mineral assemblages, textural relationships and U-Pb ID TIMS geochronology on zircon and monazite followed by pseudosection modelling. Peak conditions reached granulite facies conditions (T ≥ 810–820 °C) at moderate crustal depths (P = ca. 8 kbar) and resulted in partial Melting. Peak-pressure conditions were followed by isothermal decompression at elevated temperatures. After exhumation to crustal levels of about 4–5 kbar, the area underwent a final near-isobaric cooling, which is documented by a secondary growth of garnet. Zircons indicate a period of growth at 570–566 Ma, whereas monazite ages range from 610 to 525 Ma. A likely heat source for the granulite facies metamorphism is decay of radioactive heat-producing elements in the core of the orogen. The combined geochronology and metamorphic data indicate a prolonged, clockwise P-T path, which reflects collision and formation of a long-lived orogenic plateau
