Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 541, Issue -, Pages 86-92Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.01.014
Keywords
Superhydrophobic; Concrete coating; Mechanical strength
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51605078, 21774051]
- Science Fund for Creative Research Groups of NSFC [51621064]
- Young Elite Scientists Sponsorship Program by CAST (YESS) [2017QNRC001]
- Aviation Science Fund [2017ZE63012]
- EPSRC project [EP/N024915/1]
- EPSRC [EP/N024915/1] Funding Source: UKRI
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Reinforced concrete is widely used in civil engineering due to its outstanding mechanical properties and low cost. However, icing and corrosion on concrete-based facilities such as roads, dams, and bridges often cause safety issues. Superhydrophobic surface with completely water-repellent properties that are inspired by the lotus leaf in nature, has great potential to solve this problem, however, most state-of-the-art and commercial superhydrophobic coatings are expensive and weak in mechanical robustness for large-scale application on concrete. Here, we developed an inexpensive, non-fluorinated, and robust superhydrophobic concrete (S-concrete) coating with a contact angle of 160 +/- 1 degrees and sliding angle of 6.5 +/- 0.5 degrees. This coating had a high surface mechanical strength and retained superhydrophobicity after blade scratch for several times or sandpaper abrasion for 20 m distance. The robust S-concrete coating also had a good anti-icing ability, a low deicing force, and a high corrosion resistance, which is expected to be applied on roads, buildings, bridges, and many other concrete-based facilities in large scale for anti-icing and anti-corrosion purposes. (C) 2019 Elsevier Inc. All rights reserved.
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