Constructing hierarchically hydrophilic/superhydrophobic ZIF-8 pattern on soy protein towards a biomimetic efficient water harvesting material
Constructing hierarchically hydrophilic/superhydrophobic ZIF-8 pattern on soy protein towards a biomimetic efficient water harvesting material
复制标题
在大豆蛋白上构建分层亲水/超疏水 ZIF-8 图案以实现仿生高效集水材料
DOI：
10.1016/j.cej.2019.03.152
复制
发表时间：
2019-08-01
影响因子：
15.1
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
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作者：
Liu, Huan;Xie, Wen-Yan;Wang, Yu-Zhong
受Stenocara甲虫的启发，它可以从纳米布沙漠的潮湿空气中收集水，在这里，我们提出了一种简单的动态控制ZIF在天然聚合物大豆蛋白上的晶体生长。通过调节前驱体浓度和晶体生长时间，在蛋白质膜表面构建了分级的微/纳米晶体。利用这种晶体的尺寸差异，可以在表面上使用低表面能剂硬脂酸进行选择性疏水改性，从而产生可控的亲水/超疏水图案，有利于从雾中有效地收集水。研究了所制备的图案对水冷凝行为和收集效率的影响，值得注意的是，最大水收集效率可高达917.6 mg.cm（-2）.h（-1）。结果表明，仿生膜在大气集水方面具有潜在的应用价值，简单的表面图案化方法有助于开发功能性表面图案化材料。
Inspired by the Stenocara beetle that can collect water from moist air in the Namib desert, here, we propose a simple dynamic control of crystal growth of ZIF on a natural polymer, soy protein. By adjusting the precursor concentration as well as the crystal growth time, hierarchical micro-/nano-crystals are constructed on the protein film surface. Taking advantage of the size difference of such crystals, selectively hydrophobic modification with a low surface-energy agent, stearic acid, can be performed on the surface, creating controllably hydrophilic/superhydrophobic patterns in favor of efficient water harvesting from fog. The effects of the as-prepared patterns on the water condensation behavior and collection efficiency are investigated; the maximum water collection efficiency, notably, can reach as high as 917.6 mg.cm(-2).h(-1). The results suggest that the biomimetic films hold a potential application in atmospheric water collection and the simple pattern-constructing approach is helpful to develop functional surface-patterned materials.