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Super thermal-insulation PS/PMMA/CNTs composite foams with shape recovery property formed by the synergy of ultrasound and H2O in scCO2 foaming.
- Source :
-
Composites Science & Technology . Jan2024, Vol. 245, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- For polymer foams, a high expansion rate is often required to obtain a low thermal conductivity. However, polymer foams with high expansion ratio faces a difficulty of shape recovery. In this work, polystyrene (PS)/polymethyl methacrylate (PMMA)/carbon nanotubes (CNTs) composite foams were prepared by the synergy of ultrasound and H 2 O in supercritical carbon dioxide (scCO 2) foaming. The introduction of ultrasound and H 2 O is beneficial to improving expansion ratio. CNTs can enhance the melt strength of PS/PMMA, which also absorb part of the thermal radiation. Therefore, the PS/PMMA/CNTs foams with 0.5 wt% CNTs exhibits the high expansion ratio (80.7 times), low thermal conductivity (25.98 mW/mK) and 100% compression recovery in water at 85 °C after one compression. In addition, with the increasing of filler contents, the reusability of the foam is further improved. After ten compressions, the PS/PMMA/CNTs foams with 2 wt% CNTs still achieve the 99% recovery. This work provides a new way to prepare polymer foams with super-insulation and reusability. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02663538
- Volume :
- 245
- Database :
- Academic Search Index
- Journal :
- Composites Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 173970067
- Full Text :
- https://doi.org/10.1016/j.compscitech.2023.110343