Sprayable, durable, and superhydrophobic coating of silica particle brushes based on octadecyl bonding and polymer grafting via surface-initiated ATRP for efficient oil/water separation
Sprayable, durable, and superhydrophobic coating of silica particle brushes based on octadecyl bonding and polymer grafting via surface-initiated ATRP for efficient oil/water separation
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DOI：
10.1016/j.eurpolymj.2021.110729
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发表时间：
2021-08
影响因子：
6
通讯作者：
Liang Xiaofei;Xiao Wang;Yuan Yukun;Wu Mingyuan;Wu Qingyun;L. Jiuyi;Yang Jianjun;Jianan Zhang
中科院分区：
文献类型：
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作者：
Liang Xiaofei;Xiao Wang;Yuan Yukun;Wu Mingyuan;Wu Qingyun;L. Jiuyi;Yang Jianjun;Jianan Zhang
设计了一种简便的方法来制备可喷涂、耐用和超疏水涂层，以通过表面引发（SI-ATRP）的二氧化硅颗粒刷实现高效的油/水分离和吸油。通过连续引发剂束缚和SI-ATRP工艺制备了十八烷基键合的聚（苯乙烯-丙烯腈）（PSAN）接枝二氧化硅纳米粒子（NP）（C18-SiO2-g-PSAN），并将其直接用作各种多孔基材的表面超疏水涂层。结果证实十八烷基和PSAN成功键合在二氧化硅纳米粒子上。在轻松喷涂 C18-SiO2-g-PSAN 后，由于十八烷基所带来的低表面能成分以及二氧化硅纳米粒子和多孔基材引起的粗糙结构的协同效应，涂覆的多孔基材表现出超疏水性，前进水接触角 (WCA) 超过 150°。以棉织物为基材的超疏水多孔基材表现出高油水分离效率，达到 98.8%，以聚氨酯海绵为基材，对异辛烷的吸油能力达到 39.2 g/g。可回收性和对机械磨损的强大耐用性使其成为恶劣环境下工业油污染水处理和海洋溢油清理的有希望的候选者。
A facile approach to prepare sprayable, durable, and superhydrophobic coating was designed for highly efficient oil/water separation and oil absorption based on silica particle brushesviasurface-initiated (SI-ATRP). Octadecyl group bonded and poly(styrene-co-acrylonitrile) (PSAN) grafted silica nanoparticles (NPs) (C18-SiO2-g-PSAN) were prepared by sequential initiator tethering and SI-ATRP processes, which were directly applied as surface superhydrophobic coating for various porous substrates. The results confirmed that octadecyl group and PSAN were successfully bonded on silica NPs. After facile spraying of C18-SiO2-g-PSAN, the coated porous substrates displayed superhydrophobicity with an advancing water contact angle (WCA) exceeding 150° due to the synergistic effects of low surface energy compositions contributed by the tethered octadecyl group and the rough structure induced by silica NPs and porous substrates. Superhydrophobic porous substrates exhibited high oil/water separation efficiency achieving 98.8% by using cotton fabric as substrate and remarkable oil absorption capacity of 39.2 g/g for isooctane using polyurethane sponge as substrate. The recyclability and strong durability against mechanical abrasion enable them to be promising candidates for industrial oil-contaminated water treatments and marine spilt oil cleanup in harsh environments.