Preparation and characterization of capric-palmitic acids eutectics/silica xerogel/exfoliated graphite nanoplatelets form-stable phase change materials

2020 ◽  
pp. 102016
Author(s):  
Ni Tan ◽  
Ting Xie ◽  
Ping Hu ◽  
Yang Feng ◽  
Qi Li ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Exfoliated Graphite ◽  
Silica Xerogel ◽  
Stable Phase ◽  
Graphite Nanoplatelets ◽  
Exfoliated Graphite Nanoplatelets ◽  
Palmitic Acids

Enhanced Thermal Conductivity of Phase Change Materials Modified by Exfoliated Graphite Nanoplatelets

2009 ◽  
Vol 1218 ◽  
Author(s):  
Jinglei Xiang ◽  
Lawrence Drzal
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Phase Change Materials ◽  
Particle Orientation ◽  
Exfoliated Graphite ◽  
Critical Parameters ◽  
Gravimetric Analysis ◽  
Graphite Nanoplatelets ◽  
Scanning Calorimetry ◽  
Exfoliated Graphite Nanoplatelets

AbstractComposite phase change materials (PCM) were prepared by mixing exfoliated graphite nanoplatelets (xGnP) into paraffin wax. The two types of graphite nanoplatelets that were investigated were xGnP-1 having thickness of 10 nm and a diameter of 1 um and xGnP-15 having the same thickness with a platelet diameter of 15 um. Direct casting and two roll milling were used to prepare samples. Scanning electron microscopy images show that the nanofillers disperse very well in paraffin matrix without noticeable agglomeration. Paraffin/xGnP-15 PCM consistently exhibited higher thermal conductivity than xGnP-1 PCM. The improvement in thermal conductivity was as high as 5 fold for xGnP-15 composites and 2 fold for xGnP-1 composites at 4 vol%. The aspect ratio, particle orientation, and interface density between the conductive particles and the polymer matrix were found to be the critical parameters in determining the conductivities of the resulting nanocomposites. The thermal physical properties of the nanocomposites were investigated by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). It was found that the latent heat of nanocomposites was not negatively affected in the presence of xGnP particles and the thermal stability improved.

Preparation and characterization of PVC-based form-stable phase change materials

2014 ◽  
Vol 130 ◽  
pp. 435-441 ◽  
Author(s):  
Xiaoming Jin ◽  
Jianli Li ◽  
Ping Xue ◽  
Mingyin Jia
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Stable Phase
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