چكيده به لاتين
In recent years, superhydrophobic nanostructured coatings have been attracted many interests due to numerous applications such as self-cleaning, icephobic and anti-corrosion and oil water sepration. In the present work, micro-nano structured superhydrophobic carbonate intercalated Zinc Aluminum Layered Double Hydroxide (ZnAl-CO3-LDH) coating was fabricated on cotton fabric substrate via chemical bath deposition method. The Taguchi experimental design was applied to study of the main parameters of the ZnAl-CO3-LDH synthesis and determine optimum condition. According to Taguchi prediction, the Optimal Conditions were as follows: zinc nitrate/aluminum nitrate molar ratio of 2, urea/salts concentration of 5, total salts concentration of 0.1 M and hydrolysis reaction time of 5.5. Furthermore, to achieve better thin film deposition, ZnO seed layer was deposited on the substrate before coating process. In order to evaluate the wetting behavior of the obtained coatings was evaluated by measuring static and dynamic contact angles. compared with superhydrophilic surface of untreated cotton fabric, the ZnAl LDH coated fabric shows excellent superhydrophobic property with water contact angle of °158.56±°0.64 and contact angle hysteresis of °2.79±°1.09 . Results showed that the reaction time was the most effective parameter to achieve higher values of WCA. The XRD, ATR-FTIR, SEM, roughness test and TG were used to characterize the samples. Moreover, the fabric washing durability was tested based on ISO-105 standard Test Method. The average crystallite size of optimum sample was estimated as 32.5 nm using the Scherrer equation.
