Effect of crystallinity on the recovery rate of superhydrophobicity in plasma-nanostructured polymers

Abstract

This study investigates the influence of molecular properties as well as the macroscopic structure on surface properties.

The Effect of Fiber Type and Yarn Diameter on Superhydrophobicity, Self-Cleaning Property, and Water Spray Resistance

“…Removing the soils on the surface by rolling water droplets is important for superhydrophobic textiles [ 49 ] to be widely applied in daily life because it shortens the number of washing cycles, reduces energy consumption, and enhances the care convenience and environmental friendliness [ 1 , 4 , 5 , 6 , 7 , 11 , 14 ]. In this study, the rolling-down distances of water droplets were measured on the staple and filament fabrics contaminated without and with silicon carbides ( Supplementary Materials Tables S2 and S3 ).…”

“…Many techniques have been developed to render surface roughness [ 8 , 9 , 10 ] and hydrophobization. To date, the micro/nano hierarchical structures has been fabricated on the surfaces via plasma etching [ 4 , 5 , 7 , 11 , 12 , 13 ] or chemical etching [ 6 , 14 ], and plasma deposition [ 5 , 15 , 16 , 17 ], chemical vapor deposition [ 18 ], or wet coating [ 1 ] has been used to lower the surface energy. Some studies investigated the effect of the number of monofilament [ 19 ] and yarn types (filament and Drawn Textured Yarn, DTY) [ 20 ] on superhydrophobicity.…”

Development of Energy-Efficient Superhydrophobic Polypropylene Fabric by Oxygen Plasma Etching and Thermal Aging

“…This is attributed to the higher thermal aging temperature that resulted in a higher molecular chain mobility, and quick rearrangement and diffusion of the surface polar groups in the surface [ 29 ]. The minimum temperature required for the hydrophobic recovery of the PP film used by Oh et al [ 30 ] was 55 °C, while that in this study was 100 °C since the hydrophobic recovery was determined not only by the glass transition temperature Tg, which indicates molecular mobility, but also by crystallinity and orientation [ 30 ]. The PP fabric used in this study and PP film in a previous study [ 30 ] has crystallinities of 37.2% and 65.1%, respectively.…”

“…The minimum temperature required for the hydrophobic recovery of the PP film used by Oh et al [ 30 ] was 55 °C, while that in this study was 100 °C since the hydrophobic recovery was determined not only by the glass transition temperature Tg, which indicates molecular mobility, but also by crystallinity and orientation [ 30 ]. The PP fabric used in this study and PP film in a previous study [ 30 ] has crystallinities of 37.2% and 65.1%, respectively. Therefore, surface hydrophobic recovery at a low temperature would be possible for the PP fabric owing to its lower crystallinity than the PP film.…”

Superhydrophobic fabric mixed with polyester and cotton yarns modified by alkaline treatment and thermal aging

“…In particular, in the case of polyester, above the glass transition temperature, not only the chain of the amorphous region but also the tie chain, which is connecting the crystal to the crystal, becomes shorter in the crystal region. 30 Add to, as shown in Figure 3(a) and 3(b), the static contact angle decreased and shedding angle increased as the percentage of cotton fibers increased because of the increase of hydrophilic groups. Cotton fiber consists of cellulose which is formed by two b-glucose units forming b-glycosidic bonds with several thousand bonded glucose units.…”