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http://dx.doi.org/10.12925/jkocs.2017.34.3.525

Preparation of superhydrophilic coating solutions containing fluorosurfactants and characterization of their antifogging and antifouling properties  

Lee, Soo (Department of Chemical Engineering, Changwon National University)
Im, Sun Moon (Department of Chemical Engineering, Changwon National University)
Hwang, Heon (Department of Bio-Mechatronics Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Applied Science and Technology / v.34, no.3, 2017 , pp. 525-535 More about this Journal
Abstract
In order to produce hydrophilic coating solution, which has superior antifogging and antifouling effect on the glass surface of solar cell module as well as improving photovoltaic efficiency, nanosilica was dispersed in an aqueous solution of Tween 20 and fluorosurfactant composed of decafluorobutane and polyethylene glycol. The antifogging effect at high temperature was excellent for all the coating solutions containing nanosilica, but the antifouling effect was observed when the content of nanosilica was over 6 wt%. As the content of fluorosurfactant increased, the initial water contact angle slightly increased and the antifogging effect remained well until 500 wiping with wet $Wipeol^{(R)}$. The antifouling effect was also excellent regardless of the content of fluorosurfactant, thus 0.1 wt% of the fluorosurfactant was enough for a coating solution production. From the AFM results, when 0.1 wt% to 0.3 wt% of the fluoro surfactant was added, the fractal structure of the coated glass surface was clearly existed and contributed to the better antifouling effect. The transmittance of coated glass surface was highest in TL-1 coating solution containing 0.1 wt% of fluorosurfactant, and the addition of fluorosurfactant in a larger amount than 0.1 wt% did not improve the transmittance. This result is in good agreement with the previous AFM result which shows a high surface roughness as well as a fractal structure formation for the TL-1 coating solution.
Keywords
Nanosilica; Fluorosufactant; Nonionic surfactant; Antifouling; Fractal;
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Times Cited By KSCI : 4  (Citation Analysis)
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