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(a) Changes of water contact angle on the coating surface within 80 s incubation time. (b) Diameter changes of water droplet on coating surface within 80 s, which was expressed as ΔD/Do, where ΔD = D - Do and Do is the initial wetted diameter of the water droplet (time = 0 s) and D is the wetted diameter of the water droplet at certain time. All the data were the average of three times recorded in 4 s interval.
