超临界二氧化碳技术制备的聚丙烯/三元乙丙橡胶开孔发泡材料的吸油行为

摘要

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 CO2 foaming 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 ad-sorption theoretical model.%以聚丙烯(PP)和三元乙丙橡胶(EPDM)的混合物(质量比为70:30)为聚合物基体,利用超临界二氧化碳发泡技术调控工艺过程,制备出不同发泡倍率和孔径的开孔材料,进而详细研究了其吸油性能.接触角测试结果表明,该材料具有良好的疏水亲油性."吸油-压缩"循环测试结果显示,该材料具有良好的重复吸油性,同时,发泡倍率越大,材料压缩强度越小,而永久形变量也逐渐下降.最后,吸油动力学研究发现,单位质量的吸油量随发泡倍率的增大而增大,并且吸油动力学符合准二级吸附理论模型.