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![]() ![]() |
刊名 | Journal of Materials Chemistry A
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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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