4.7 Article

Superhydrophobic corn straw as a versatile platform for oil/water separation

期刊

CELLULOSE
卷 28, 期 8, 页码 4835-4846

出版社

SPRINGER
DOI: 10.1007/s10570-021-03803-z

关键词

Corn straw; Superhydrophobic; Durable; Oil; water separation; Polydimethylsiloxane (PDMS)

资金

  1. National Natural Science Foundation of China [11704321]
  2. Natural Science Foundation of Shandong Province [ZR2019MEM044]
  3. Shandong Education Department [2019KJA007]
  4. Yantai Science and Technology Plan Projects [2019XDHZ087]

向作者/读者索取更多资源

The development of advanced oil/water separation materials using natural corn straw as raw material is challenging, but the resulting superhydrophobic corn straw-based materials showed durability and high separation efficiency even after multiple cycles of use.
Development of advanced oil/water separation materials with durability, versatility, and cost-efficiency in a green manner is highly desired yet still challenging. Herein, to address this challenge, we fabricated an advanced platform for oil/water separation using natural corn straw as a raw material. Superhydrophobic corn straw (SHCS) blocks and filter paper with deposited SHCS powder were fabricated by one-step immersion processes that were simple and cost-efficient. The resulting corn straw-based materials kept their superhydrophobicity after immersing in oil, hand-bending test, abrasion with sandpaper, and even 120 h of UV irradiation. The SHCS block was used as an oil sorbent scaffold to absorb oils from oil/water mixtures selectively; while the SHCS powder deposited filter paper was demonstrated as a membrane to separate oil/water mixtures efficiently even in acidic, alkaline, salty, and high-temperature conditions (more than 80 degrees C). Importantly, these SHCS-based materials retained their high separation efficiency even after 10 cycles of oil/water separation. Graphic abstract Superhydrophobic corn straw that can be used as a versatile platform for oil/water separation was fabricated.

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