Abstract: Open-cell polymer foams with different cell sizes and foaming ratios were prepared from 70% polypropylene (PP) and 30% ethylene-propylene-diene monomer (EPDM) rubber blends by supercritical CO2foaming technology, and their oil-absorbing performance were investigated. The results of the water contact angles experiment showed that they have outstanding hydrophobic and lipophilic property. Oil-absorbing and compression tests appealed that they have excellent repeated oil-absorbing performance, both of compression strength and permanent strain were declined with the increasing foaming ratio. And oil absorption kinetics study found that unit mass of oil absorption increased as the rising foaming ratio, and oil absorption kinetics conform to the secondary adsorption theoretical model.
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