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Environmentally Friendly Solvent‐ and Water‐Based Coatings for Mitigation of Crystallization Fouling
Author(s) -
AlJanabi Abdullah,
Malayeri M. Reza
Publication year - 2015
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400457
Subject(s) - fouling , chemical engineering , crystallization , adhesion , solvent , van der waals force , surface energy , environmentally friendly , adhesive , materials science , induction period , chemistry , composite material , molecule , organic chemistry , catalysis , layer (electronics) , ecology , biochemistry , membrane , engineering , biology
Abstract The surface properties of solvent‐based (SB) and water‐based (WB) coatings and their impact on fouling during convective heat transfer of CaSO 4 solutions were investigated. Experiments demonstrated that the SB coatings had generally better non‐adhesive characteristics, especially at higher values of the electron donor component since the deposits could easily be washed away. For the SB coatings, a longer induction period compared to those of untreated surfaces was observed and a significant reduction of the fouling rate could be achieved. Further analysis of surfaces revealed that SB coatings enhanced the acid‐base repulsive force and thus reduced the deposit/solid adhesion energy. For the WB coatings, the Liftshitz‐van der Waals attractive force plays a decisive role in the adhesion process due to the higher apolar component of the surface energy.