Modeling and Analysis of the Effect of Dip-Spin Coating Process Parameters on Coating Thickness Using Factorial Design Method

Abstract

Statistical modeling of the dip-spin coating process to describe colloidal PTFE dispersion coating on the external surface of a small diameter hollow tube was developed by using 2 4 factorial design with a center point to predict the coating thickness in a range of 4-10 m. The coating parameters included viscosity, withdrawal rate, spin speed, and immersion time. The adequacy of the predicted model was verified by coefficients of determination and lack-of-fit test. Model accuracy was verified by comparing predicted values with experimental results. The significant interaction effects on the coating thickness were three-way interaction among withdrawal rate, spin speed, and immersion time and two-way interactions between viscosity and withdrawal rate, viscosity and spin speed, and viscosity and immersion time. Cube plot for coating thickness reveals a trend of increasing coating thickness towards high levels of viscosity, withdrawal rate, and immersion time and lower level of spin speed.

Fabrication of Polydimethysiloxane (PDMS) Dense Layer on Polyetherimide (PEI) Hollow Fiber Support for the Efficient CO2/N2 Separation Membranes

“…A wet film with higher concentration was formed at the drying front, due to the higher ratio of surface area to volume, which results in the drawing of solution from surrounding area. When a dry film was formed at the drying front, a capillary force appeared on the solution, resulting in the thickening of the coated film [ 46 , 47 , 48 , 49 ].…”

Empirical Model to Predict the Hydroxyapatite Thickness on the Surface of 316l Stainless Steel by the Dip Coating Method

“…The longer the immersion time of the 316L stainless steel substrate in the slurry, the thicker the resulting HA layer is. The thickness of the layer increases with an increasing immersion time [16]. The longer the immersion time, the longer the contact that occurs between the 316L stainless steel substrate with the HA slurry, so that the resulting layer is thicker.…”

“…The coefficients are quantitative measures of the effect of the parameters. The higher the coefficient value, the greater the effect of these parameters on the thickness of the HA layer [16]. Effect of the sintering temperature on the hydroxyapatite coating thickness.…”

Composite of PLA Nanofiber and Hexadecyl Trimethyl-Ammonium Chloride-Modified Montmorillonite Clay: Fabrication and Morphology

“…The tensile strength and elongation at break were calculated with an average of five-sample values. The thickness was adjusted with a micrometer caliper [40].…”

“…It has been observed that PLA/MMT nanocomposites can show significant improvement in mechanical properties of the material with the addition of MMT [39]. Pluta et al studied the structure, dielectric, viscoelastic, and thermal properties of PLA/MMT nanocomposites by using a melt blending technique [40]. In our previous study, we fabricated and characterized electrospun films from polylactic acid and CTAC-MMT clay [41].…”