SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 54 ›› Issue (2): 296-305.DOI: 10.1016/j.cjche.2022.03.023

• Full Length Article • 上一篇    下一篇

The superhydrophobic sponge decorated with Ni-Co double layered oxides with thiol modification for continuous oil/water separation

Xiaodong Yang, Na Yang, Ziqiang Gong, Feifei Peng, Bin Jiang, Yongli Sun, Luhong Zhang   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • 收稿日期:2021-11-15 修回日期:2022-03-13 出版日期:2023-02-28 发布日期:2023-05-11
  • 通讯作者: Luhong Zhang,E-mail:zhanglvh@tju.edu.cn
  • 基金资助:
    We are grateful for the financial support from National Key Research & Development Program of China (2017B0602702)

The superhydrophobic sponge decorated with Ni-Co double layered oxides with thiol modification for continuous oil/water separation

Xiaodong Yang, Na Yang, Ziqiang Gong, Feifei Peng, Bin Jiang, Yongli Sun, Luhong Zhang   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2021-11-15 Revised:2022-03-13 Online:2023-02-28 Published:2023-05-11
  • Contact: Luhong Zhang,E-mail:zhanglvh@tju.edu.cn
  • Supported by:
    We are grateful for the financial support from National Key Research & Development Program of China (2017B0602702)

摘要: In this paper, the superhydrophobic polyurethane sponge (SS-PU) was facilely fabricated by etching with Jones reagent to bind the nanoparticles of Ni-Co double layered oxides (LDOs) on the surface, and following modification with n-dodecyl mercaptan (DDT). This method provides a new strategy to fabricate superhydrophobic PU sponge with a water contact angle of 157° for absorbing oil with low cost and in large scale. It exhibits the strong absorption capacity and highly selective characteristic for various kinds of oils which can be recycled by simple squeezing. Besides, the as-prepared sponge can deal with the floating and underwater oils, indicating its application value in handling oil spills and domestic oily wastewater. The good self-cleaning ability shows the potential to clear the pollutants due to the ultra-low adhesion to water. Especially, the most important point is that the superhydrophobic sponge can continuously and effectively separate the oil/water mixture against the condition of turbulent disturbance by using our designed device system, which exhibit its good superhydrophobicity, strong stability. Furthermore, the SS-PU still maintained stable absorption performance after 150 cycle tests without losing capacity obviously, showing excellent durability in long-term operation and significant potential as an efficient absorbent in large-scale dispose of oily water.

关键词: Superhydrophobic sponge, Ni-Co double layered oxides, Thiol modification, Oil absorption, Oil/water separation

Abstract: In this paper, the superhydrophobic polyurethane sponge (SS-PU) was facilely fabricated by etching with Jones reagent to bind the nanoparticles of Ni-Co double layered oxides (LDOs) on the surface, and following modification with n-dodecyl mercaptan (DDT). This method provides a new strategy to fabricate superhydrophobic PU sponge with a water contact angle of 157° for absorbing oil with low cost and in large scale. It exhibits the strong absorption capacity and highly selective characteristic for various kinds of oils which can be recycled by simple squeezing. Besides, the as-prepared sponge can deal with the floating and underwater oils, indicating its application value in handling oil spills and domestic oily wastewater. The good self-cleaning ability shows the potential to clear the pollutants due to the ultra-low adhesion to water. Especially, the most important point is that the superhydrophobic sponge can continuously and effectively separate the oil/water mixture against the condition of turbulent disturbance by using our designed device system, which exhibit its good superhydrophobicity, strong stability. Furthermore, the SS-PU still maintained stable absorption performance after 150 cycle tests without losing capacity obviously, showing excellent durability in long-term operation and significant potential as an efficient absorbent in large-scale dispose of oily water.

Key words: Superhydrophobic sponge, Ni-Co double layered oxides, Thiol modification, Oil absorption, Oil/water separation