The Experts below are selected from a list of 95037 Experts worldwide ranked by ideXlab platform
Wei Yang - One of the best experts on this subject based on the ideXlab platform.
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polyethylene glycol graphene oxide aerogel shape stabilized phase Change materials for photo to thermal energy conversion and storage via tuning the oxidation degree of graphene oxide
Energy Conversion and Management, 2017Co-Authors: Lisheng Tang, Jie Yang, Ruiying Bao, Zhengying Liu, Banghu Xie, Mingbo Yang, Wei YangAbstract:Abstract Polyethylene glycol (PEG)/graphene oxide aerogel (GA) composite phase Change materials (PCMs) were prepared by introducing PEG into GAs from graphene oxide (GO) with different oxidation degree via vacuum impregnation. The structures of GAs were tuned by the oxidation levels of GO. A series of characterizations were used to analyze the chemical structure of GOs, including X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analysis. Structural analyses confirmed that the oxygenated functional groups increased and the hydroxyl groups were transformed into carboxyl and epoxy groups with increasing oxidation level. In addition, the graphitic nature of GO decreased while the sp3 domains of GOs increased owing to the disruption of the graphitic stacking order. Morphology analysis showed that the breakage of graphene sheet became more serious with the oxidation level increasing. When GAs prepared with GOs of higher oxidation levels were used, the composite PCMs showed excellent shape-stability during phase Change and excellent thermal repeatability. The Change of Dimension for PGA6-40 heated from 35 °C to 150 °C was negligible under the load of a constant force (7 N). Efficient photo-to-thermal energy conversion and storage was realized in the composite PCMs.
Lisheng Tang - One of the best experts on this subject based on the ideXlab platform.
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polyethylene glycol graphene oxide aerogel shape stabilized phase Change materials for photo to thermal energy conversion and storage via tuning the oxidation degree of graphene oxide
Energy Conversion and Management, 2017Co-Authors: Lisheng Tang, Jie Yang, Ruiying Bao, Zhengying Liu, Banghu Xie, Mingbo Yang, Wei YangAbstract:Abstract Polyethylene glycol (PEG)/graphene oxide aerogel (GA) composite phase Change materials (PCMs) were prepared by introducing PEG into GAs from graphene oxide (GO) with different oxidation degree via vacuum impregnation. The structures of GAs were tuned by the oxidation levels of GO. A series of characterizations were used to analyze the chemical structure of GOs, including X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analysis. Structural analyses confirmed that the oxygenated functional groups increased and the hydroxyl groups were transformed into carboxyl and epoxy groups with increasing oxidation level. In addition, the graphitic nature of GO decreased while the sp3 domains of GOs increased owing to the disruption of the graphitic stacking order. Morphology analysis showed that the breakage of graphene sheet became more serious with the oxidation level increasing. When GAs prepared with GOs of higher oxidation levels were used, the composite PCMs showed excellent shape-stability during phase Change and excellent thermal repeatability. The Change of Dimension for PGA6-40 heated from 35 °C to 150 °C was negligible under the load of a constant force (7 N). Efficient photo-to-thermal energy conversion and storage was realized in the composite PCMs.
Jie Yang - One of the best experts on this subject based on the ideXlab platform.
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polyethylene glycol graphene oxide aerogel shape stabilized phase Change materials for photo to thermal energy conversion and storage via tuning the oxidation degree of graphene oxide
Energy Conversion and Management, 2017Co-Authors: Lisheng Tang, Jie Yang, Ruiying Bao, Zhengying Liu, Banghu Xie, Mingbo Yang, Wei YangAbstract:Abstract Polyethylene glycol (PEG)/graphene oxide aerogel (GA) composite phase Change materials (PCMs) were prepared by introducing PEG into GAs from graphene oxide (GO) with different oxidation degree via vacuum impregnation. The structures of GAs were tuned by the oxidation levels of GO. A series of characterizations were used to analyze the chemical structure of GOs, including X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analysis. Structural analyses confirmed that the oxygenated functional groups increased and the hydroxyl groups were transformed into carboxyl and epoxy groups with increasing oxidation level. In addition, the graphitic nature of GO decreased while the sp3 domains of GOs increased owing to the disruption of the graphitic stacking order. Morphology analysis showed that the breakage of graphene sheet became more serious with the oxidation level increasing. When GAs prepared with GOs of higher oxidation levels were used, the composite PCMs showed excellent shape-stability during phase Change and excellent thermal repeatability. The Change of Dimension for PGA6-40 heated from 35 °C to 150 °C was negligible under the load of a constant force (7 N). Efficient photo-to-thermal energy conversion and storage was realized in the composite PCMs.
Ruiying Bao - One of the best experts on this subject based on the ideXlab platform.
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polyethylene glycol graphene oxide aerogel shape stabilized phase Change materials for photo to thermal energy conversion and storage via tuning the oxidation degree of graphene oxide
Energy Conversion and Management, 2017Co-Authors: Lisheng Tang, Jie Yang, Ruiying Bao, Zhengying Liu, Banghu Xie, Mingbo Yang, Wei YangAbstract:Abstract Polyethylene glycol (PEG)/graphene oxide aerogel (GA) composite phase Change materials (PCMs) were prepared by introducing PEG into GAs from graphene oxide (GO) with different oxidation degree via vacuum impregnation. The structures of GAs were tuned by the oxidation levels of GO. A series of characterizations were used to analyze the chemical structure of GOs, including X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analysis. Structural analyses confirmed that the oxygenated functional groups increased and the hydroxyl groups were transformed into carboxyl and epoxy groups with increasing oxidation level. In addition, the graphitic nature of GO decreased while the sp3 domains of GOs increased owing to the disruption of the graphitic stacking order. Morphology analysis showed that the breakage of graphene sheet became more serious with the oxidation level increasing. When GAs prepared with GOs of higher oxidation levels were used, the composite PCMs showed excellent shape-stability during phase Change and excellent thermal repeatability. The Change of Dimension for PGA6-40 heated from 35 °C to 150 °C was negligible under the load of a constant force (7 N). Efficient photo-to-thermal energy conversion and storage was realized in the composite PCMs.
Zhengying Liu - One of the best experts on this subject based on the ideXlab platform.
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polyethylene glycol graphene oxide aerogel shape stabilized phase Change materials for photo to thermal energy conversion and storage via tuning the oxidation degree of graphene oxide
Energy Conversion and Management, 2017Co-Authors: Lisheng Tang, Jie Yang, Ruiying Bao, Zhengying Liu, Banghu Xie, Mingbo Yang, Wei YangAbstract:Abstract Polyethylene glycol (PEG)/graphene oxide aerogel (GA) composite phase Change materials (PCMs) were prepared by introducing PEG into GAs from graphene oxide (GO) with different oxidation degree via vacuum impregnation. The structures of GAs were tuned by the oxidation levels of GO. A series of characterizations were used to analyze the chemical structure of GOs, including X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analysis. Structural analyses confirmed that the oxygenated functional groups increased and the hydroxyl groups were transformed into carboxyl and epoxy groups with increasing oxidation level. In addition, the graphitic nature of GO decreased while the sp3 domains of GOs increased owing to the disruption of the graphitic stacking order. Morphology analysis showed that the breakage of graphene sheet became more serious with the oxidation level increasing. When GAs prepared with GOs of higher oxidation levels were used, the composite PCMs showed excellent shape-stability during phase Change and excellent thermal repeatability. The Change of Dimension for PGA6-40 heated from 35 °C to 150 °C was negligible under the load of a constant force (7 N). Efficient photo-to-thermal energy conversion and storage was realized in the composite PCMs.