Novel one-step route to induce long-term lotus leaf-like hydrophobicity in polyester fabric

Hafeez, Hassan; Cho, Si-Hyeong; Han, Dong‐Ho; Seo, Young-Gill; Choa, Yong‐Ho; Park, Jin-Goo

doi:10.1080/01694243.2014.998002

Cited by 8 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum water repellency (WCA = 145.5°) was observed in the case of the type-I pattern because deep accurate replicate patterns were observed in type-I compared to others at the optimum condition. Hassan Hafeez et al [24] developed lotus leaf-type micro-patterns over the polyester polymer through hot embossing, and variation in the wettability of the surface was evaluated. Three types of patterns (similar to lotus leaf patterns) were developed on the Ni-plate by making the small dimensional change to investigate its impact on wettability.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of superhydrophobic surface by a dimensional change in surface topography of microchannel on polymer substrate through induction-aided hot embossing: parametric investigation and optimization

Deshmukh,

Rana,

Goswami

2023

Surf. Topogr.: Metrol. Prop.

View full text Add to dashboard Cite

Hot embossing (HE) is a micro-fabrication technique employed to create micron-scale patterns on the polymer substrate. An in-house induction-assisted hot embossing (IHE) setup was fabricated to complete the embossing in a short duration as compared to traditional hot embossing process. This work alters the polymer surface topography to make it superhydrophobic for self-cleaning. Fiber laser machining was used to produce four-microchannel designs on an Aluminum-6061 plate in which the microchannel width was varied from 600 μm to 150 μm while maintaining a constant adjacent distance of 300 μm. This textured plate is employed as a mold in the IHE setup. IHE process parameters, embossing temperature, pressure, time, and deembossing temperature were varied to emboss the mold designs on a polyethylene terephthalate substrate. Thereafter, the embossed microchannel height, surface roughness, and water contact angle perpendicular to the embossed microchannels (WCA⟂) were calculated. The parametric analysis examined how operational factors affected the output. The experiment was done as per the central composite design (experimental design) part of the design-of-experiments useful in the response surface model. Parametric research demonstrates that embossed microchannel height and width had a maximum effect on WCA⟂. Type-IV microchannels with 150 μm width demonstrated the highest WCA⟂. The WCA⟂ was mostly impacted by embossed microchannel height; hence a regression model was created using type-IV channel height data. Analysis of variance showed that embossing temperature mainly impacts microchannel height. The recently invented Jaya-algorithm optimized this model to increase embossed microchannel height and WCA⟂. Setting the parameters at the best level predicted by Jaya-algorithm yielded an embossed microchannel height inaccuracy of 2.18%. The WCA⟂ measured on the surface of a sample prepared at the best parameters was found to be 154.71°± 2°. Lastly, FTIR (Fourier-transform-infrared-spectroscopy) test showed no chemical composition change between the embossed and bare samples.

show abstract

Section: Introductionmentioning

confidence: 99%