Versatility of polyethylene glycol (PEG) in designing solid–solid phase change materials (PCMs) for thermal management and their application to innovative technologies

2017 ◽  
Vol 5 (35) ◽  
pp. 18379-18396 ◽  
Author(s):  
Swati Sundararajan ◽  
Asit B. Samui ◽  
Prashant S. Kulkarni
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Thermal Management ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Preparation Methods ◽  
Innovative Technologies

A review focussed on the preparation methods and applications of polyethylene glycol (PEG) based solid–solid phase change materials (PCMs).

Electrospun Polyethylene Glycol/Polyvinyl Alcohol Composite Nanofibrous Membranes as Shape-Stabilized Solid–Solid Phase Change Materials

2020 ◽  
Vol 2 (3) ◽  
pp. 167-177 ◽  
Author(s):  
Junwen Huang ◽  
Houyong Yu ◽  
Somia Yassin Hussain Abdalkarim ◽  
Jaromir Marek ◽  
Jiri Militky ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Polyvinyl Alcohol ◽  
Phase Change ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Nanofibrous Membranes

Preparation and Characterization of a Novel Polyurethane Solid-Solid Phase Change Materials

2013 ◽  
Vol 785-786 ◽  
pp. 613-617
Author(s):  
Gui Fang Wang ◽  
Dong Ying Li ◽  
Guang Ling Pei
Keyword(s):  
Phase Transition ◽  
Polyethylene Glycol ◽  
Phase Change ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Soft Segment ◽  
Condensation Reaction ◽  
Diphenylmethane Diisocyanate ◽  
Scanning Calorimetry ◽  
Polarization Optical Microscopy

A novel solid-solid phase change materials was synthesized by the two-step condensation reaction of polyethylene glycol (PEG1000), neopentyl glycol (NPG) and 4, 4-diphenylmethane diisocyanate (MDI). Polyethylene glycol (PEG1000) was used as soft segment and 4, 4-diphenylmethane diisocyanate (MDI) as hard segment. The composition, structure and phase change properties were characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), polarization optical microscopy (POM) respectively. The results indicated that the PCM appeared typical solid-solid phase transition property and the phase change enthalpy and phase transition temperature reached to 120.45 J/g and 37.32°C, respectively.

Synthesis and Characterization of Solid State Phase Change Material Microcapsules for Thermal Management Applications

2013 ◽  
Author(s):  
Fangyu Cao ◽  
Jing Ye ◽  
Bao Yang
Keyword(s):  
Heat Capacity ◽  
Solid State ◽  
Phase Change ◽  
Thermal Management ◽  
Latent Heat ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Silica Shell ◽  
Heat Transfer Fluid ◽  
Change Behavior

Polyalcohols such as neopentyl glycol (NPG) undergo solid-state crystal transformations that absorb/release sufficient latent heat. These solid-solid phase change materials (PCM) can be used in practical thermal management applications without concerns about liquid leakage and thermal expansion during phase transition. In this paper, microcapsules of NPG encapsulated in silica shell were successfully synthesized with the use of the emulsion technique. The size of the microcapsules was in the range of 0.2–4 μm, and the thickness of the silica shell was about 30 nm. It was found that the endothermic event of the phase change behavior of these NPG-silica microcapsules was initiated at around 39 °C and the latent heat was about 96.0 J/g. A large supercooling of about 43.3 °C was observed in the pure NPG particles without shell. The supercooling of the NPG microcapsules can be reduced to about 14 °C due to the heterogeneous nucleation sites provided by the silica shell. These NPG microcapsules were added into heat transfer fluid PAO to enhance its heat capacity. The effective heat capacity of the fluids can be increased by 56% by adding 20 wt. % NPG-silica microcapsules.

Synthesis and Characterization of Solid-State Phase Change Material Microcapsules for Thermal Management Applications

2013 ◽  
Vol 4 (4) ◽  
Author(s):  
Fangyu Cao ◽  
Jing Ye ◽  
Bao Yang
Keyword(s):  
Heat Capacity ◽  
Solid State ◽  
Phase Change ◽  
Thermal Management ◽  
Latent Heat ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Silica Shell ◽  
Heat Transfer Fluid ◽  
Nucleation Sites

Polyalcohols such as neopentyl glycol (NPG) undergo solid-state crystal transformations that absorb/release significant latent heat. These solid–solid phase change materials (PCM) can be used in practical thermal management applications without concerns about liquid leakage and thermal expansion during phase transitions. In this paper, microcapsules of NPG encapsulated in silica shells were successfully synthesized with the use of emulsion techniques. The size of the microcapsules range from 0.2 to 4 μm, and the thickness of the silica shell is about 30 nm. It was found that the endothermic phase transition of these NPG-silica microcapsules was initiated at around 39 °C and the latent heat was about 96.0 J/g. A large supercooling of about 43.3 °C was observed in the pure NPG particles without shells, while the supercooling of the NPG microcapsules was reduced to about 14 °C due to the heterogeneous nucleation sites provided by the silica shell. These NPG microcapsules were added to the heat transfer fluid PAO to enhance its heat capacity and the effective heat capacity of the fluid was increased by 56% with the addition of 20 wt. % NPG-silica microcapsules.

Preparation and Performance of Phase Change Materials of PEGA-g-CEA

2015 ◽  
Vol 723 ◽  
pp. 656-659
Author(s):  
Jing Guo ◽  
Chun Fang Yu ◽  
Si Yang Mu ◽  
Hong Zhang ◽  
Yu Mei Gong
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Phase Change Materials ◽  
Graft Copolymerization ◽  
Solid Phase ◽  
Side Chain ◽  
Composition And Structure ◽  
Infrared Spectrometer ◽  
And Performance ◽  
Chain Type

Polyethylene glycol acrylate-grfat-Cellulose-acrylate (PEGA-g-CEA) has been synthesized as side-chain-type solid-solid phase change materials for thermal energy storange through graft copolymerization. The composition and structure of the grafts and cellulose, phase transition properties and morphology of grafts were investigated by Fourier transform infrared spectrometer (FTIR), differential scaanning calorimentry (DSC) and optical microscopy. The results show that the polyethylene glycol (PEG) successfully grafted onto the cellulose macromolecule, and the solid-solid phase change materials with a certain phase transformation ability were obtained through this experiment.

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