Chen Xi, Zhang Junying, Chen Xinya, Zhu Yuting, Liu Xunshan
Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Zhejiang Sci-Tech University, 928 Second Street, Hangzhou 310018, China.
ACS Omega. 2023 Mar 7;8(11):10487-10492. doi: 10.1021/acsomega.3c00121. eCollection 2023 Mar 21.
In this paper, a porous polyurethane sponge with excellent hydrophobicity was prepared through thermal phase separation. Preparation condition modified experiments were systematically carried out, and a sponge with a saturated oil absorption capacity (13.3 g g) and a rapid absorption rate (achieving absorption equilibrium within 20 s) was achieved. The thermoplastic polyurethane (TPU) sponge as an oil absorbent is capable of selectively absorbing various oils/organic solvents from oil/water mixtures with a high recovery rate. To further enhance the hydrophobicity and mechanical properties of the porous sponge, 3% reduced graphene oxide was doped to this material. The morphological investigation indicated that the three-dimensional composite sponges have uniformly distributed micropores and nanopores, and the hydrophobicity and mechanical properties were improved. The composite as a whole exhibited remarkable superelasticity, excellent reversible compressibility, and fatigue resistance (strength up to 186 kPa at 80% strain), which allows it to re-absorb oil by simple manual extrusion. The abovementioned properties make this TPU porous material a promising candidate for practical application in water pollution treatment.
本文通过热相分离制备了具有优异疏水性的多孔聚氨酯海绵。系统地进行了制备条件改性实验,获得了一种饱和吸油容量为13.3 g/g且吸油速率快(20 s内达到吸附平衡)的海绵。热塑性聚氨酯(TPU)海绵作为吸油剂,能够从油/水混合物中选择性地吸收各种油类/有机溶剂,且回收率高。为进一步提高多孔海绵的疏水性和力学性能,向该材料中掺杂了3%的还原氧化石墨烯。形态学研究表明,三维复合海绵具有均匀分布的微孔和纳米孔,疏水性和力学性能得到了改善。该复合材料整体表现出显著的超弹性、优异的可逆压缩性和抗疲劳性(在80%应变下强度高达186 kPa),这使得它能够通过简单的手动挤压重新吸收油。上述特性使这种TPU多孔材料成为水污染治理实际应用中的一个有前景的候选材料。