Biomimetic Antigravity Water Transport and Remote Harvesting Powered by Sunlight

被引：15
作者：
Geng, Hongya [1 ]
Lv, Cunjing [2 ,3 ]
Wu, Mingmao [1 ]
Ma, Hongyun [1 ]
Cheng, Huhu [4 ,5 ]
Li, Chun [1 ]
Yuan, Jiayin [6 ]
Qu, Liangti [1 ,4 ,5 ]
机构：
[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Appl Mech Lab, Dept Engn Mech, Beijing 100084, Peoples R China
[3] Tsinghua Univ, Ctr Nano & Micro Mech, Beijing 100084, Peoples R China
[4] Tsinghua Univ, State Key Lab Tribol, Dept Mech Engn, Beijing 100084, Peoples R China
[5] Tsinghua Univ, Key Lab Adv Mat Proc Technol, Dept Mech Engn, Beijing 100084, Peoples R China
[6] Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden
来源：
GLOBAL CHALLENGES | 2020年 / 4卷 / 11期
基金：
国家重点研发计划; 中国国家自然科学基金; 中国博士后科学基金; 瑞典研究理事会;
关键词：
antigravity water transport; artificial trees; biomimics; remote water harvesting; sunlight; CAPILLARY RISE; ALPHA-CHITIN; GENERATION; GRAPHENE;
D O I：
10.1002/gch2.202000043
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Antigravity water transport plays important roles in various applications ranging from agriculture, industry, and environmental engineering. In natural trees, ubiquitous water-flow over 100 m high from roots through the hierarchical xylem to leaves is driven by sunlight-powered continuous evaporation and the negative pressure. Inspired by natural trees, herein an artificial trunk-leaf system is built up to structurally mimic natural trees for a continuous antigravity water delivery. The artificial tree consists of directional microchannels for antigravity water transport, and a top leaf-like hybrid hydrogel that are acts as continuous solar steam evaporator, plus a purposely engineered steam collector. It is found that continuous uniform microchannels of acetylated chitin optimize and enhance capillary rise (approximate to 37 cm at 300 min) and reduce vertical water transport resistance. A remote water harvesting, and purification is performed with a high rate of 1.6 kg m(-2) h(-1) and 184 cm in height under 1 sun irradiation and the collection efficiency up to 100% by evaporative cooling technique. It is envisioned that the basic design principles underlying the artificial tree can be used to transform solar energy into potential energy.
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页数：9
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