Multibioinspired Janus membranes with superwettable performance for unidirectional transportation and fog collection
Multibioinspired Janus membranes with superwettable performance for unidirectional transportation and fog collection
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DOI：
10.1016/j.cej.2020.126515
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发表时间：
2021-01-15
影响因子：
15.1
通讯作者：
Guo, Zhiguang
中科院分区：
文献类型：
--
作者：
Li, Deke;Fan, Yufeng;Guo, Zhiguang
异质润湿表面对液滴操控在基础研究、国内和工业生产等各个方面都发挥着重要影响。在这里，受到仙人掌刺的不对称分层结构、甲虫背部交错的亲液/疏液（LI/LO）微图案、猪笼草植物光滑的液体注入多孔表面以及挺水水生植物的定向泵性能的启发，我们设计了一种具有异质润湿和互穿结构的多生物启发Janus膜。多生物启发的Janus膜是通过采用喷涂和蚀刻的组合策略制造的，它表现出液体单向操纵行为，可实现高效的雾气收集。此外，通过在去湿过程中调整低能硅油的沉积位点，构建了从尖端到根部具有LI润湿、LO润湿和光滑能力的Cu(OH)(2)纳米纤维和ZnO四足体。液滴可以从各个方向聚集到微孔凸块上，并自发地通过微孔渗透到LI Cu(OH)(2)纳米纤维作为储库，无需额外的外力。因此，液滴只能通过毛细管力和光滑特性进行传输，这是由具有阵列凸块和一层注入润滑剂的膜形成的。这种 Janus 膜具有高集水效率和出色的可回收性，具有广泛的应用前景，包括液体分离、液滴处理和其他范围。
Heterogeneous wetting surfaces have played an important impact for droplet manipulation in various aspects, such as fundamental research, domestic and industrial production. Here, inspired by the asymmetric hierarchical structure of cactus spines, the interleaved lyophilic/lyophobic (LI/LO) micropattern of beetle back, slippery liquid-infused porous surface of Nepenthes plants, and directional pumping performance of emergent aquatic plants, we designed a multibioinspired Janus membrane with heterogeneous wetting and interpenetrating structure. The multibioinspired Janus membrane was fabricated by employing combined strategies of spraying and etching, which exhibits a liquid unidirectional manipulation behaviour for highly efficient fog collection. Moreover, Cu(OH)(2) nanofibers and ZnO-tetrapod from tip to root with LI wetting, LO wetting, and slippery abilities are constructed by adjusting the deposited site of low-energy silicone oil during the dewetting process. And liquid droplets can be gathered to the micropore bumps from all directions and spontaneously permeate through micropores to LI Cu(OH)(2) nanofibers as a reservoir without extra force. As a result, droplet can only transport by capillary force and slippery properties, which generates from the Janus membrane with array bumps and a layer of film infused with lubricant. This Janus membrane with high water collection efficiency and excellent recyclability has the promising candidates for a broad field of applications, including liquid separation, droplets manipulation, and other ranges.