High-performance humidity control coatings prepared from inorganic wastes

摘要: Abstract Valorization of industrial wastes in an economic and environmental-friendly way is important. In the present study, preparation humidity control coatings (HCCs), which energy-saving method to regulate indoor humidity, are developed by recycling inorganic sludges (i.e., enhancement silica fume (ESF) spent fluid catalytic cracking catalysts (sFCCC)). Bassanite, kaolin, sodium silicates acrylic resins combined with ESF sFCCC different amounts prepare HCCs. Experimentally, moisture adsorption–desorption performance HCCs increases as increases. Moreover, can be enhanced range medium relative (50–75%) upon addition results formation more micropores However, excessive could reduce adsorbed capacities 50–90% due decrease mesopore volume. As a result, 38% 10% have optima ratios mesoporous microporous structure showing value content 309 g m−2 27.0%, respectively, much better than commercial (58.7 g m−2 11.4%). prepared reach coating benchmark level 2 (based on Japanese Industrial Standards (JIS A 1470-1)) at (50–75%). simulation tests variable temperatures, exhibit narrow amplitude change (7% humidity) smaller (11–13% humidity). Most importantly, good film hardness, 99.99% antimicrobial efficacy environmental friendliness according pencil, antibacterial activity toxicity characteristic leaching procedure (TCLP) tests, respectively.