Thermal behavior of composite phase change materials based on polyethylene glycol and expanded vermiculite with modified porous carbon layer

2018 ◽  
Vol 53 (18) ◽  
pp. 13067-13080 ◽  
Author(s):  
Xiaoguang Zhang ◽  
Jiaxin Qiao ◽  
Weiyi Zhang ◽  
Fei Cheng ◽  
Zhaoyu Yin ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Thermal Behavior ◽  
Phase Change ◽  
Porous Carbon ◽  
Phase Change Materials ◽  
Carbon Layer ◽  
Expanded Vermiculite ◽  
Composite Phase Change Materials

Shape-stabilized phase-change materials supported by eggplant-derived porous carbon for efficient solar-to-thermal energy conversion and storage

2020 ◽  
Vol 4 (4) ◽  
pp. 1764-1772 ◽  
Author(s):  
Yaqiong Li ◽  
Xiubing Huang ◽  
Yang Li ◽  
Zuoshuai Xi ◽  
Guangtong Hai ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Porous Carbon ◽  
Phase Change Materials ◽  
Carbon Materials ◽  
Thermal Conversion ◽  
Thermal Energy Conversion ◽  
Composite Phase Change Materials ◽  
Energy Conversion And Storage ◽  
And Storage

3D spongy-like porous carbon materials derived from eggplants were used as scaffolds for encapsulating polyethylene glycol (PEG) to fabricate shape-stabilized composite phase-change materials with excellent solar-to-thermal conversion efficiency.

Preparation and thermal properties of shape-stabilized composite phase change materials based on polyethylene glycol and porous carbon prepared from potato

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15821-15830 ◽  
Author(s):  
Bo Tan ◽  
Zhaohui Huang ◽  
Zhaoyu Yin ◽  
Xin Min ◽  
Yan'gai Liu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polyethylene Glycol ◽  
Phase Change ◽  
Phase Change Material ◽  
Porous Carbon ◽  
Phase Change Materials ◽  
Composite Phase Change Materials ◽  
Composite Phase Change Material ◽  
Change Material

A shape-stabilized composite phase change material comprising PEG and porous carbon was prepared by absorbing PEG into porous carbon.

Polyethylene Glycol/Expanded Vermiculite Shape-Stabilized Composite Phase Change Materials for Thermal Energy Storage

2016 ◽  
Vol 847 ◽  
pp. 39-45
Author(s):  
Yong Deng ◽  
Jin Hong Li ◽  
Ting Ting Qian ◽  
Wei Min Guan ◽  
Xiang Wang
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Latent Heat ◽  
Phase Change Materials ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Scanning Calorimetry ◽  
Heating And Cooling ◽  
Expanded Vermiculite ◽  
Composite Phase Change Materials

Polyethylene glycol (PEG)/ expanded vermiculite (EVMT) shape-stabilized composite phase change material (ss-CPCM) was prepared by a facile vacuum impregnation method. The maximum mass percentage for PEG retained in ss-CPCM was 75.1 wt.% due to specific non-uniform flat layers pore structure of EVMT. The scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR) analysis results indicated that the melted PEG was adsorbed on the surface and completely dispersed into the pores of EVMT and no chemical changes took place during the heating and cooling processes. X-ray diffraction (XRD) results showed that the crystal structure of PEG was not destroyed after impregnation whereas the crystallization process of PEG was greatly restrained. Differential scanning calorimetry (DSC) results indicated that ss-CPCM melted at 57.61°C with a latent heat of 103.1 J/g and solidified at 33.19°C with a latent heat of 88.29 J/g. In addition, the thermal conductivity of ss-CPCM reached 0.418W/m K. The ss-CPCM can be considered as promising candidate materials for building applications due to their suitable phase change temperature, large latent heat and excellent chemical compatibility.

scholarly journals Polyethylene Glycol-Carbon Nanotubes/Expanded Vermiculite Form-Stable Composite Phase Change Materials: Simultaneously Enhanced Latent Heat and Heat Transfer

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 889 ◽  
Author(s):  
Yong Deng ◽  
Mingyue He ◽  
Jinhong Li ◽  
Zhiwei Yang
Keyword(s):  
Heat Transfer ◽  
Carbon Nanotubes ◽  
Polyethylene Glycol ◽  
Latent Heat ◽  
Phase Change Materials ◽  
Storage Capacity ◽  
Heat Storage ◽  
Inhibition Effect ◽  
Expanded Vermiculite ◽  
Composite Phase Change Materials

Polyethylene glycol (PEG)-carbon nanotubes (CNTs) with expanded vermiculite (EVM) form-stable composite phase change materials (PCE-CPCMs) were constructed via the efficient synergistic effect between EVM and CNTs. The resultant material demonstrated simultaneously enhanced latent heat and heat transfer. The unique EVM pore structure and CNTs surfaces contributed to the form stability of PCE-CPCMs. The adsorption capacity was 77.75–81.54 wt %. The latent heat of the PCE-CPCMs increased with increasing CNTs content due to the decreasing inhibition effect of EVM and the increasing adsorption capacity of PEG, which was 83.9 J/g during melting and 104.2 J/g during solidification for PCE7.09. The pore confinement and surface EVM interactions inhibited the heat storage capacity of the PCE-CPCMs. Moreover, the inhibition effect on the heat storage capacity of PCE-CPCMs during the melting process was stronger than during solidification due to the crystallization-promoting effect. The heat transfer of PCE-CPCMs was significantly enhanced by the CNTs filler (0.5148 W/(m·K) for PCE7.09) due to the decrease in interfacial thermal resistance and the formation of rapid thermally conductive pathways. Fourier transform infrared spectroscopy, thermogravimetric analysis, and thermal cycles test results confirmed that the PCE-CPCMs exhibited excellent chemical compatibility, thermal stability, and reliability.

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