scholarly journals Effect of Boron Nitride on the Heat Transfer and Heat Storage of Poly(ethylene glycol)/Expanded Vermiculite Composite Phase-Change Materials

ACS Omega ◽  
2022 ◽  
Author(s):  
Heng Wang ◽  
Jie Lei ◽  
Taofen Wu ◽  
Dan Wu ◽  
Hai Liu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Boron Nitride ◽  
Ethylene Glycol ◽  
Phase Change ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Poly Ethylene Glycol ◽  
Expanded Vermiculite ◽  
Composite Phase Change Materials ◽  
Poly Ethylene

Preparation and Characterization of Heat-Storage and Thermo Regulated Composite Material by Reaction Extrusion

2013 ◽  
Vol 821-822 ◽  
pp. 76-79
Author(s):  
Hong Zhang ◽  
Di Ke Sun ◽  
Hui Liu ◽  
Jing Guo ◽  
Yu Mei Gong
Keyword(s):  
Ethylene Glycol ◽  
Phase Change ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Extrusion Process ◽  
Poly Ethylene Glycol ◽  
Easy Method ◽  
Mean Body Temperature ◽  
Ft Ir ◽  
Poly Ethylene

Phase change materials exhibiting excellent heat storage property can be used for energy saving applications. The textile made by fiber with PCMs can provide human body a comfortable microenvironment. The heat-storage and thermo-regulated fiber with active poly (ethylene glycol) acrylate (PEGA) as phase change materials was prepared by reaction extrusion. Poly (ethylene glycol) acrylate was grafted to polypropylene (PP) during the extrusion process. Combining preparation with functionalization, this easy method makes the entire producing process more efficient and simple. We used nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FT-IR) to characterize the structure of PEGA and PP-g-PEGA, and the results proved the synthesis of graft copolymer. Differential scanning calorimeter (DSC) was used for characterizing functional fibers thermal property. The fiber with fixed enthalpy provided heat storage and themo-regulated property. The melting and crystalline latent heat of best sample is 6.83J/g and 1.32J/g, respectively. The crystalline temperature region is from 41.67°C to 34.23°C, which is close to mean body temperature and it shows great potential in functional textile.

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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