Fabricating curved super-hydrophobic surfaces greenly using recycled polypropylene

Lin, Yung Tsan; Chou, Jung-Hua

doi:10.1007/s12588-016-9141-8

Cited by 5 publications

(3 citation statements)

References 40 publications

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“…Although CA measurement is the most common way to assess surface wettability, measurement practices are still varied, e.g. a wide range in the droplet volume [7,17,21,32]. The sliding angle is a dynamic measure of the surface hydrophobicity.…”

Section: Planar Structured Polymer Surfacesmentioning

confidence: 99%

“…Curved surface profiles with structures have been produced by e.g. two-beam laser interference [20], molding under heated and pressurized conditions [21], injection molding [22], and micropattern transfer [23]. Wettability-adjusted curved surfaces have been shown to be suitable for directional droplet movement [24] and controlled liquid overflow [25].…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic hierarchical three-level structures on 3D polypropylene surfaces

Mielonen

Pakkanen

2019

J. Micromech. Microeng.

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Hierarchical micro-micro-nanostructures were fabricated on planar and curved polypropylene surfaces by injection molding. The metal mold insert was microstructured with a microworking robot and nanostructured with an anodization process. 3D surface curvature was based on the simple bending of the mold insert into convex and concave dome-shaped formations. Three-level structural hierarchy was demonstrated to enhance superhydrophobicity compared to two-level structures. The third structural level on top of two lower structural levels decreased the contact area between the water droplet and polymer surface, which resulted in the high contact angle (CA) of 170°, low CA hysteresis of 5° and easily sliding droplets. Microstructures can be considered to protect other hierarchical levels, and the three-level-structured surface is less susceptible to lose its superhydrophobicity compared to two-level-structured surfaces. Structuration of four length scales was realized on the curved surfaces when the curvature in millimeter scale was combined with the surface structures in two microscales and nanoscale.

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Section: Planar Structured Polymer Surfacesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superhydrophobic hierarchical three-level structures on 3D polypropylene surfaces

Mielonen

Pakkanen

2019

J. Micromech. Microeng.

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“…Independent of the way in which the SHS is produced, it is important to consider the origin of the starting materials and their cost. Due to this problem, scientists have recently tried to use discarded products from industrial productions [35][36][37] and urban solid waste [38][39][40] as starting materials. The use of recycled materials for SHS production allows the environmental impact to be reduced and to create a cheap advanced material.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobicity and Durability in Recyclable Polymers Coating

Cirisano

Ferrari

2021

Sustainability

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Highly hydrophobic and superhydrophobic materials obtained from recycled polymers represent an interesting challenge to recycle and reuse advanced performance materials after their first life. In this article, we present a simple and low-cost method to fabricate a superhydrophobic surface by employing polytetrafluoroethylene (PTFE) powder in polystyrene (PS) dispersion. With respect to the literature, the superhydrophobic surface (SHS) was prepared by utilizing a spray- coating technique at room temperature, a glass substrate without any further modification or thermal treatment, and which can be applied onto a large area and on to any type of material with some degree of fine control over the wettability properties. The prepared surface showed superhydrophobic behavior with a water contact angle (CA) of 170°; furthermore, the coating was characterized with different techniques, such as a 3D confocal profilometer, to measure the average roughness of the coating, and scanning electron microscopy (SEM) to characterize the surface morphology. In addition, the durability of SH coating was investigated by a long-water impact test (raining test), thermal treatment at high temperature, an abrasion test, and in acidic and alkaline environments. The present study may suggest an easy and scalable method to produce SHS PS/PTFE films that may find implementation in various fields.

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Study on Preparation and Aging Properties of Superhydrophobic Paper Mulch

Zhang

Dai

et al. 2021

Fibers Polym

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Fabricating curved super-hydrophobic surfaces greenly using recycled polypropylene

Cited by 5 publications

References 40 publications

Superhydrophobic hierarchical three-level structures on 3D polypropylene surfaces

Superhydrophobic hierarchical three-level structures on 3D polypropylene surfaces

Superhydrophobicity and Durability in Recyclable Polymers Coating

Study on Preparation and Aging Properties of Superhydrophobic Paper Mulch

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