期刊论文

Min, Yonggang(ygmin@gdut.edu.cn);Wang, Ruibin(rbwang@usc.edu.cn)

英文

Diamond and Related Materials

0925-9635

2022

130

109495

10.1016/j.diamond.2022.109495

The morphology of different foams was compared by observing their SEM images as shown in Fig. 2. Apparently, the incorporation of three different allotropic carbons caused varied foam density enhancements in PS. Comparing with pure PS, all the doped composite foams showed a considerable reduction in cell diameter to reach as small as 79.1 ± 3.9 μm, resulting in a significant increase in foam density about 1000 times higher (≤3.23 × 1014 cell/cm3). At the same time, more round/irregularly-shaped

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Due to its low thermal conductivity on average (~0.039 W/(m·K)), supercritical expanded polystyrene (PS) foam could be used as an insulation material in buildings to save energy and minimize the maintenance costs. However, the specific solubilizing and fast diffusing behavior of CO2 in PS limited the formation of micropores and the further increase of macropores, which resulted in on limited decrease in thermal conductivity. In this study, one-dimensional carbon nanotubes, two-dimensional graphene, and three-dimensional activated carbon were l...