Durability evaluation of superhydrophobic copper foams for long-term oil-water separation
Durability evaluation of superhydrophobic copper foams for long-term oil-water separation
复制标题
超疏水泡沫铜长期油水分离耐久性评价
DOI：
10.1016/j.apsusc.2017.02.184
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发表时间：
2017-06
影响因子：
6.7
通讯作者：
Zhang Youfa
中科院分区：
文献类型：
--
作者：
Zhu Haiyan;Gao Lin;Yu Xinquan;Liang Caihua;Zhang Youfa
超疏水三维多孔复合材料具有良好的机械稳定性和高效性，在油水分离领域具有广阔的应用前景。因此，通过在骨架上原位生长图案化的Cu(OH)2纳米针或氧化锌纳米晶(如氧化锌纳米锥和氧化锌纳米棒)，然后进行化学改性，制备了几种超疏水泡沫铜。所有的超疏水泡沫铜都表现出了高效的油水分离能力，特别是在预纳米结构骨架上含有氧化锌纳米棒阵列的样品。然后对超疏水泡沫铜的耐久性进行了评价。尽管超疏水样品经循环评价后仍保持了95%以上的分离效率，但预粗化泡沫铜在样品中表现出最好的抗各种损伤的性能。微观结构演变表明，电沉积铜纳米颗粒经过前处理后，铜骨架的覆盖率由光滑的膨胀微晶转变为粗大的纳米晶。粗糙的纳米晶不仅可以避免形成松散的层次化结构，而且可以提高图案化纳米棒与基质之间的结合力。因此，与其他纳米棒相比，所制备的紧密图案化的氧化锌纳米棒可以在损伤下保持稳定，表现出极大的机械稳定性。此外，我们通过定期去除纳米结构间隙中的残余油，使用耐用泡沫实现了长期有效的油水分离。
Superhydrophobic three-dimensional porous composites with good mechanical stability and high efficiency are promising candidates for oil-water separation application. Hence, several superhydrophobic copper foams were fabricated via the in situ growth of patterned Cu(OH)2nanoneedles or ZnO nanocrystals (e.g. ZnO nanocones and ZnO nanorods) on the skeleton and followed by chemically modification. All the superhydrophobic copper foams showed efficient oil-water separation ability, especially the samples with ZnO nanorods arrays on the pre-nanostructured skeleton. The durability of superhydrophobic copper foams were then evaluated. Although the superhydrophobic samples kept separation efficiency higher than 95% after cycled evaluation, the pre-roughened copper foams exhibited the best performance against various damage among the samples. Microstructural evolution revealed that the coverage of the copper skeleton became from smooth swelling micro-crystals into rough nano-crystals after the pre-treatment of electrodepositing copper nanoparticles. The rough nanocrystals could not only avoid the formation of loose hierarchical structure, but also improve the binding force between patterned nanorods and the matrix. The fabricated closely-patterned ZnO nanorods could thus remain stable under the damage compared to others, presenting great mechanical robustness. Furthermore, we achieved a long-term efficient oil-water separation using the durable foams by periodic removal of residual oil in nanostructure gaps.
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DOI：
10.1021/jp502873z
发表时间：
2014-10
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
Yongmei Xia;Youfang Zhang;Xin-quan Yu;Feng Chen
通讯作者：
Yongmei Xia;Youfang Zhang;Xin-quan Yu;Feng Chen
影响因子：
4.9
作者：
Dongmian Zang;Chunxiao Wu;Ruiwen Zhu;Wen Zhang;Xin-quan Yu;Youfa Zhang
通讯作者：
Dongmian Zang;Chunxiao Wu;Ruiwen Zhu;Wen Zhang;Xin-quan Yu;Youfa Zhang
具有水下超疏油性的双尺度多孔硝化纤维素膜可实现高效油/水分离
影响因子：
29.4
作者：
Gao, Xuefei;Xu, Li-Ping;Zhang, Xueji
通讯作者：
Zhang, Xueji
影响因子：
9.5
作者：
Li, Jin-Jin;Zhou, Yin-Ning;Luo, Zheng-Hong
通讯作者：
Luo, Zheng-Hong
用于连续分离油/水/油三元混合物的 pH 响应型智能表面
影响因子：
9.7
作者：
Ju, Guannan;Cheng, Mengjiao;Shi, Feng
通讯作者：
Shi, Feng