Plasma and thermoforming treatments to tune the bio-inspired wettability of polystyrene

Lepore, Emiliano; Faraldi, P.; Bongini, D.; Boarino, Luca; Pugno, Nicola

doi:10.1016/j.compositesb.2011.05.028

Cited by 10 publications

(5 citation statements)

References 42 publications

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“…Hierarchical structures, such as the ones found on the lotus leaf [1,2], are useful to improve water repellence of a surface. Specific roughness topologies are in general able to change the wetting property of a surface [3,4]. Different studies demonstrate theoretically [5][6][7] and experimentally [8,9] the importance of hierarchy.…”

Section: Introductionmentioning

confidence: 99%

Fast and large area fabrication of hierarchical bioinspired superhydrophobic silicon surfaces

Ghio

Paternoster

Bartali

et al. 2016

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 99%

Fast and large area fabrication of hierarchical bioinspired superhydrophobic silicon surfaces

Ghio

Paternoster

Bartali

et al. 2016

Journal of the European Ceramic Society

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“…We consider a series of 20 (five of them were considered in [20,29,52]) random volume drops, gently deposited on the Fig. 1 Schematic illustration of our lotus leaf replication process, composed of two steps at room temperature and atmospheric pressure Fig.…”

Section: Wettability Measurementmentioning

confidence: 99%

“…However, it was highlighted that a more, than the maximum CA, important parameter to determine when a surface is superhydrophobic is TA, due to its correlation with the driving force of a liquid drop [9]. In a previous work of our group [52], we introduce other two parameters -the sliding volume (SV) and the sliding speed (SS)-as additional indexes of the superhydrophobicity and selfcleaning property of a surface; this was motivated by the fact that SV and SS are straightforward and direct measurements of the surface water-repellency and selfcleaning ability, in both static and dynamic regimes. Moreover, we have defined the drop minimum volume and the corresponding sliding speed with respect to a vertical surface very close to the real condition of use (i.e., glass windows, external building coverings, internal faces of refrigerators or freezers, surfaces of bathroom fittings or tiles, etc.).…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Polystyrene by Direct Copy of a Lotus Leaf

Lepore

Pugno

2011

BioNanoSci.

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In this paper, we report the realization of an artificial biomimetic superhydrophobic polystyrene (PS) surface by direct copy of a natural lotus leaf, using a simple template method at ambient temperature and atmospheric pressure. We characterized the water sliding behavior by measuring the contact angle (CA), sliding angle, sliding volume, and sliding speed (SS) of the lotus leaf (CA=153.4°, SS = 319.4 mm/s), copied lotus leaf, negative silicone template, flat silicone and PS control surfaces, and final PS artificial leaf (CA=149.0°, SS=416.7 mm/s); the last one displays properties comparable with those of lotus. This template method needs neither expensive instruments nor complicated chemical treatments. An adequate optimization of this molding process into automated industrial procedures will lead to a new, innovative, cheap concept for the largescale industrial development of superhydrophobic surfaces, also starting from their intrinsically hydrophilic counterparts, as here demonstrated for PS.

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“…Although they were able to measure water CA of 164°, they realized that microtextures can be filled with water, especially when condensation is present. A similar approach was suggested by Lepore et al 6 , as they proposed surface modification of polystyrene plates by electrical discharge (corona treatment). Their results indicate that corona treatment is a helpful technique for tailoring surface tension of polymeric matrices.…”

Section: Introductionmentioning

confidence: 99%

A Nano-modified superhydrophobic membrane

et al. 2013

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This paper focuses on the synthesis of super-hydrophobic membranes. The polymer used in this research is polystyrene (PS), which has low surface energy but not low enough to be characterized as a superhydrophobic material. As hydrophobicity is based on low energy surface and surface roughness, the electrospinning technique was selected as the manufacturing technique. N, N' dimethylformamide (DMF) was employed as the PS solvent. Two groups of PS/DMF solutions were investigated i.e. 20/80 and 35/65. To increase even more the hydrophobicity, nanoparticles of silica, graphene, cadmium, and zinc were dispersed into the PS/DMF solutions. In contrast to results previous published in literature, the PS/DMF weight ratio of 20/80 led to water contact angles (WCA) of 148°, which is higher than the contact angle for the 35/65 ratio, i.e. 143°. This fact seems to be due to the presence of non-evaporated solvent into the PS surface as the 35/65 solution was more viscous. The WCA for membranes with 0.

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Plasma and thermoforming treatments to tune the bio-inspired wettability of polystyrene

Cited by 10 publications

References 42 publications

Fast and large area fabrication of hierarchical bioinspired superhydrophobic silicon surfaces

Fast and large area fabrication of hierarchical bioinspired superhydrophobic silicon surfaces

Superhydrophobic Polystyrene by Direct Copy of a Lotus Leaf

A Nano-modified superhydrophobic membrane

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