中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Superhydrophobic sand: a hope for desert water storage and transportation projects

文献类型:期刊论文

作者Chen, Liwei1; Si YF(司一帆)1; Guo ZG(郭志光)1,2; Liu WM(刘维民)2
刊名Journal of Materials Chemistry A
出版日期2017
卷号5期号:14页码:6416-6423
ISSN号2050-7488
通讯作者郭志光
英文摘要

Sand, an abundant natural resource, is the cause behind the harsh environmental conditions of the desert, such as water shortages and sand storms. Because of the strong hydrophilicity of sand itself, water can be quickly absorbed by sand, which greatly impedes desert greening, water storage and transportation projects. In contrast to this conventional understanding of sand (i.e., superhydrophilicity), we propose the design of “superhydrophobic sand”, aimed to address issues associated with the desert environment and sand resource utilization. In our experiments, three kinds of hydrophobic sands with different surface structures and wettability properties were successfully prepared by cladding nonmetal (SiO2) and metal (Ag and Cu) inorganic materials on sand grain surfaces and then modifying them with low-surface-energy chemicals. Combining superhydrophobicity with desert sand, superhydrophobic sand (PFDS-sand@SiO2) is shown to have excellent water repellency, allowing water to stably remain and flow on such a sand surface without any wetting or permeation. Furthermore, the superhydrophobic sand demonstrates a great water-holding capacity, such that a sand layer with a thickness of 2 cm can sustain a water column height of 35 cm. Very significantly, PFDS-sand@SiO2 exhibits extremely high thermal stability up to 400 °C when used for water storage. This result is unprecedented and sufficient for facing the high-temperature conditions of the desert environment and some others. In addition to reliable water storage, such superhydrophobic sand also demonstrates a great anti-flow-dragging effect during water transportation, whereby a water droplet can smoothly and quickly roll down a simulated sand channel (13 cm length) within 0.3 s (∼0.45 m s−1). All of these manifestations imply the significant potential of such “superhydrophobic sand” in its application to desert water storage and transportation.

学科主题材料科学与物理化学
收录类别SCI
资助信息the National Nature Science Foundation of China (No. 51522510;51675513);the National 973 Project (2013CB632300)
语种英语
WOS记录号WOS:000398323400009
源URL[http://210.77.64.217/handle/362003/21631]  
专题兰州化学物理研究所_固体润滑国家重点实验室
作者单位1.Hubei Univ, Minist Educ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Key Lab Green Preparat & Applicat Funct Mat, Wuhan 430062, Peoples R China
2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714
Chen, Liwei,Si YF,Guo ZG,et al. Superhydrophobic sand: a hope for desert water storage and transportation projects[J]. Journal of Materials Chemistry A,2017,5(14):6416-6423.
APA Chen, Liwei,Si YF,Guo ZG,&Liu WM.(2017).Superhydrophobic sand: a hope for desert water storage and transportation projects.Journal of Materials Chemistry A,5(14),6416-6423.
MLA Chen, Liwei,et al."Superhydrophobic sand: a hope for desert water storage and transportation projects".Journal of Materials Chemistry A 5.14(2017):6416-6423.

入库方式: OAI收割

来源:兰州化学物理研究所

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