Enhanced thermal properties of polyethylene glycol/modified rice husk ash eco-friendly form-stable phase change material via optimizing support pore structure

Polyethylene glycol/fumed silica composites as shape-stabilized phase change materials with effective thermal energy storage

“…The residue was considered impurities in PEG that did not contribute to the heat adsorption and release process. 16 The prepared SSPCMs exhibited weight loss in a two-step model. The first step (Fig.…”

“…In addition, the residual mass of the 60, 70, 80, and 90 wt% PEG/FS SSPCMs was found to be 41.5, 32.1, 23.8, and 14.4 wt%, corresponding to total adsorbed water and PEG effective content of 58.5, 67.9, 76.2, and 85.6 wt%, respectively. After substituting weight loss due to absorbed water and further normalizing using a reported method, 16 the PEG contents in 60–90 wt% PEG/FS SSPCMs were calculated to be 59.5, 69.2, 77.9, and 87.8 wt%, respectively. These values were highly consistent with the prepared ratios of 60, 70, 80, and 90 wt%, respectively, indicating PEG was uniformly distributed throughout FS porous network.…”

Shape-Stabilized Phase Change Materials of Stearic Acid Confined in Fumed Silica

“…The leakage resistance was tested using a general method. , The SSPCMs were placed on filter papers and heated in an oven at 85 °C (∼15 °C above the melting temperature of C 18 OOH). After 45 min, the filter papers were removed from the oven and leakage was observed.…”

“…The analysis was conducted from room temperature to 600 °C, at a rate of 10 °C/min. Leakage resistance was tested following previously published procedures. , Briefly, the sample was placed on filter paper and heated in an oven for 45 min at 85 °C, which is ∼15 °C higher than the phase transition temperature of C 18 OOH. The sample was then removed from the filter paper, and the area of the filter paper under the sample was carefully examined to determine the leakage.…”

Water-resistant gum-based phase change composite for thermo-regulating insulation packaging

“…Surprisingly, for the PCC3-B2 and PCC-C1 formulations, the phase change enthalpies were slightly higher than the particle-free sample, i. e., PCC3. These insulations seemed to provide an optimal pore structure that could hold more PEG than the other samples [62]. Furthermore, the DSC of PCC3-B2 before and after ODI coating showed insignificant differences (Fig.…”