磁响应聚氨酯海绵的制备及吸油性能研究

Preparation of magnetic response PU sponge for oil absorption application

利用四氧化三铁(Fe_3O_4)纳米粒子和聚二甲基硅氧烷(PDMS)共同修饰聚氨酯(PU)海绵,制备了具有磁响应功能的PU-Fe_3O_4吸油材料,并测试了其对油、水的浸润性能和吸油能力。结果表明,PU-Fe_3O_4海绵表现出优良的疏水亲油性能,对不同的有机液体,分别能够吸收自身质量7~22倍的有机物。吸油后的PU-Fe_3O_4海绵可利用磁铁分离,PU-Fe_3O_4海绵在重复使用20次后仍能保持好的吸油能力,可循环利用。此方法中,PDMS在PU骨架表面的聚合,解决了Fe_3O_4纳米颗粒容易脱落的问题,提高了PU-Fe_3O_4的稳定性,且制备过程简单经济,具有良好的应用前景。

Fe3O4nanoparticles were synthesized by solvothermal method.Hydrophobic polyurethane sponges（PUFe3O4）for oil absorption were fabricated by subsequent modification with Fe3O4 nanoparticles and polydimethylsiloxane（PDMS）.The contact angle and oil absorbent ability of obtained sponges were measured.It was indicated that PU-Fe3O4 sponge showed good hydrophobicity and oil absorbent capacity.PU-Fe3O4 sponge had absorbent capacities of 7-22times of their own weight for different organic solvent.The PU-Fe3O4 sponge with adsorbed oil could be separated with a magnet,and kept high oil absorbed capacity after 20 cycle adsorption.In this method,the polymerized PDMS on PU framework enhanced the sponge stability.Moreover,this method had the advantage of easy operation and low-cost for future application.