表面Janus图案结构的单向导水集雾性能

doi:10.16085/j.issn.1000-6613.2023-1437

化工进展 ›› 2024, Vol. 43 ›› Issue (9): 5133-5141.DOI: 10.16085/j.issn.1000-6613.2023-1437

• 材料科学与技术 • 上一篇

表面Janus图案结构的单向导水集雾性能

李颖¹^,²^,³(), 王其召¹^,²^,³, 白波¹^,²(), 张茜¹^,²^,³, 孙文静¹^,²^,³, 张琳璇⁴

^1.长安大学旱区地下水文与生态效应教育部重点实验室，陕西西安 710054
^2.水利部旱区生态水文与水安全重点实验室，陕西西安 710054
^3.长安大学水利与环境学院，陕西西安 710054
^4.长安大学人文学院，陕西西安 710054

收稿日期:2023-08-17 修回日期:2023-11-22 出版日期:2024-09-15 发布日期:2024-09-30
通讯作者: 白波
作者简介:李颖（1999—），女，硕士研究生，研究方向为水资源高效利用。E-mail：liying8034@126.com。
基金资助:
陕西省科技创新研究团队项目(2022TD-04);长安大学研究生科研创新实践项目(300103723053)

Unidirectional water transportation and fog collection performance of Janus surface-patterned structures

LI Ying¹^,²^,³(), WANG Qizhao¹^,²^,³, BAI Bo¹^,²(), ZHANG Qian¹^,²^,³, SUN Wenjing¹^,²^,³, ZHANG Linxuan⁴

^1.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, Shaanxi, China
^2.Key Laboratory of Hydrological and Water Safety in Arid Region of Ministry of Water Resources, Xi'an 710054, Shaanxi, China
^3.School of Water and Environment, Chang'an University, Xi'an 710054, Shaanxi, China
^4.School of Humanities, Chang'an University, Xi'an 710054, Shaanxi, China

Received:2023-08-17 Revised:2023-11-22 Online:2024-09-15 Published:2024-09-30
Contact: BAI Bo

摘要/Abstract

摘要：

受沙漠甲虫启发，本文引入单宁酸金属络合物（TA-Fe³⁺）和聚二甲基硅氧烷（PDMS）对无纺布（NFc）进行润湿性改性。通过浸渍喷涂法制备了表面图案化单宁酸-铁离子/聚二甲基硅氧烷Janus无纺布（p-TA-Fe³⁺/PDMS Janus NFc），利用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）等研究了其微观结构，并搭建水雾收集器测试其雾收集性能，进一步考察表面单向水传输性能，探讨集雾行为机制。结果表明，p-Janus NFc具有甲虫状图案化表面和不对称润湿性Janus结构，亲-疏交替的润湿表面和Janus结构产生的协同效应使其表现出良好的单向水传输性能和优异的水雾收集能力。在3.0h集雾实验中，p-Janus NFc集水率可高达193.31mg/（cm²·h），为相应超亲水材料的约16倍。这种生物启发性Janus无纺布材料为构建环保高效的集雾系统、缓解干旱半干旱地区水资源短缺现状提供了一条有力途径。

关键词: Janus结构, 表面, 单向水传输, 雾收集

Abstract:

Inspired by desert beetles, tannic acid metal complex (TA-Fe³⁺) and polydimethylsiloxane (PDMS) were introduced for wettability modification of non-woven fabrics (NFc). Surface-patterned tannic acid-Fe³⁺/polydimethylsiloxane Janus non-woven fabric (p-TA-Fe³⁺/PDMS Janus NFc) was prepared by dipping and spraying method, and its microstructure and unidirectional water transport properties were investigated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). Besides, the water mist collector was constructed to test the mist collection performance to further investigate the surface unidirectional water transport properties and to explore the mechanism of the mist collection behavior. The results showed that p-Janus NFc with a beetle-like patterned surface and asymmetric wettable Janus structure exhibited good unidirectional water transport performance and excellent water mist collection due to the synergistic effects of alternating pro-hydrophobic wetting surfaces and Janus structures. In a 3.0h fog collection experiment, the water collection rate of p-Janus NFc could be as high as 193.31mg/(cm²·h), which was nearly 16 times of the corresponding superhydrophilic materials. This bio-inspired Janus non-woven material provided a powerful way to build an environmentally friendly and efficient fog collection system and alleviate water shortage in arid and semi-arid regions.

Key words: Janus structure, surface, unidirectional water transportation, fog collection

中图分类号:

TB334

李颖, 王其召, 白波, 张茜, 孙文静, 张琳璇. 表面Janus图案结构的单向导水集雾性能[J]. 化工进展, 2024, 43(9): 5133-5141.

LI Ying, WANG Qizhao, BAI Bo, ZHANG Qian, SUN Wenjing, ZHANG Linxuan. Unidirectional water transportation and fog collection performance of Janus surface-patterned structures[J]. Chemical Industry and Engineering Progress, 2024, 43(9): 5133-5141.

图/表 8

图1 p-Janus NFc材料的制备流程及结构示意图

图2 各样品SEM图像及EDS谱图

图3 ATR-FIIR分析

表1 各样品表面润湿性及水接触角（WCA）

样品	水接触角（WCA）
原始NFc	0°
TA-Fe³⁺ NFc	29.08°
Janus NFc	142.59°(HB)	80.70°(HL)
p-Janus NFc	126.19°(HB)	72.40°(HL)

图4 水在p-Janus NFc样品上的传输行为

图5 基于润湿性梯度拉普拉斯压力梯度引起的自主水输送图解

图6 p-Janus NFc表面主要集水机制

图7 各样品在水雾收集中的应用

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表面Janus图案结构的单向导水集雾性能

Unidirectional water transportation and fog collection performance of Janus surface-patterned structures

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