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Preparation of AgCl Particles with Different Superwettabilities by Particle Size Regulation
Hongyan Fu1, Lilin Yang1, Yaoguang Wang1
1Low-carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering , Sichuan University , Chengdu 610065 , PR China.
Abstract:
In this work, a simple ammonia evaporation process to obtain AgCl powder with arbitrary superwettability, without introducing any low-surface-free-energy modifier, was investigated. By controlling the recrystallization parameters of the ammonia evaporation process, AgCl crystals precipitated from AgCl-ammonia solution show different wettabilities ranging from superhydrophilicity, via hydrophilicity and hydrophobicity, to superhydrophobicity, with the same chemical composition and structure. Characterization of the obtained AgCl samples with different wettabilities confirms the decisive effect of particle size although light irradiation also causes their wettability transformation.
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