Yu Mingguang, Wang Qing, Yang Wenxin, Xu Yonghang, Zhang Min, Deng Qianjun, Liu Guang
School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, China.
State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Polymers (Basel). 2019 Mar 7;11(3):442. doi: 10.3390/polym11030442.
In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe₃O₄ magnetic nanoparticles was prepared via the in situ coprecipitation of Fe/Fe ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.
在本文中，我们提出了一种简便高效的策略，用于制备用于油/水分离的磁性、耐用且超疏水的棉织物。通过在氨水溶液中以聚乙烯吡咯烷酮（PVP）作为偶联剂原位共沉淀Fe/Fe离子，然后依次用十三氟辛基三乙氧基硅烷（FAS）进行疏水处理，制备了用Fe₃O₄磁性纳米粒子功能化的超疏水棉织物。所制备的棉织物表现出优异的超疏水性，水接触角为155.6°±1.2°，并具有良好的磁响应性。在外部磁场的控制下，棉织物作为吸油剂能够轻松地从水中吸附油，即使在热水中也显示出高油/水分离效率。此外，该棉织物具有显著的机械耐用性能，对砂纸摩擦和手指擦拭具有很强的抗性，同时保持其拒水性。本研究开发了一种新颖高效的策略，用于构建用于油/水分离的磁性、耐用且超疏水的生物质基吸附剂，该吸附剂可轻松扩大规模以用于实际吸油。
