Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 137, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2020.106035
Keywords
Graphene oxide; Interfacial friction; Nanocomposite foams; Energy dissipation
Funding
- NSFC [51731009, 51671171]
- ZJNSF [LR20E010001]
- UK EPSRC [EP/R032793/1]
- Bristol Composites Institute (ACCIS) - InCSI PhD Collaboration
- EPSRC [EP/R032793/1] Funding Source: UKRI
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This work shows how to improve the energy dissipation of open-cell polyurethane (PU) foams by creating multilayered graphene oxide (GO) nano-architectures onto the struts via a modified dip-coating process. Pristine PU foams are alternately dip-coated with GO coatings and water-based polyurethane dispersions (PUD) for a given number of times. The GO coating morphologies are carefully adjusted and the inner energy dissipation mechanisms reach the optimized interfacial frictions of GO-PU and GO-GO. Along with the synergistic effect of the multiple interpenetrating structure of GO/PU coating phases, these engineered composite foams with extremely low GO content (similar to 0.12 wt%) afford a significant increase of quasi-static energy dissipation (52%) and dynamic damping (76%) when compared with counterpart foams coated with the same number of pure PUD layers. The specific Young's modulus and strength of the designed foams also show remarkable enhancements of 310% and 490% respectively compared with those of pristine PU foams.
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