二硫化钼纳米片修饰聚氨酯海绵及吸油性能研究

Preparation and Oil Absorption Properties of MoS_2-modified PU Sponge

以二硫化钼(MoS_2)粉末为原料,采用超声辅助液相剥离法制备了MoS_2纳米片,通过MoS_2纳米片和聚二甲基硅氧烷(PDMS)依次修饰聚氨酯(PU)海绵,制备了疏水亲油性质的PU-MoS_2吸油材料,并测试了其接触角和吸油性能。结果表明,所制备的PU-MoS_2海绵有着优良的疏水亲油性能和较强的吸油能力。对不同的有机液体,PUMoS_2海绵分别能够吸取自身重量12~86倍的有机溶剂。尺寸较小MoS_2纳米片修饰制备的PU-MoS_2海绵具有较高的吸油能力。此外,PU-MoS_2海绵在重复使用20次后仍能保持强的吸油能力,表明其可循环利用,具有良好的应用前景。

MoS2 nanosheets were prepared from MoS2 powders through ultrasonic liquid exfoliation method. Hydrophobic polyurethane（PU） sponges for oil absorption were fabricated by subsequent modification with MoS2 nanosheets and polydimethylsiloxane（PDMS）. The contact angle and oil absorbent properties of the obtained sponges were measured. The results indicate that PU-MoS2 sponge shows good hydrophobicity and oil absorption capacity. PU-MoS2 sponge has absorbent capacities of 12-86 times of their own weight for different organic solvent. The PU-MoS2 sponge obtained by coating with smaller size MoS2 nanosheets has relatively higher absorption capacity. Moreover,the absorption capacity of the PU-MoS2 sponge did not deteriorate after it was reused for 20 times,so the PU-MoS2 sponge has excellent recyclability for future application.