Bio-Inspired Polymeric Structures with Special Wettability and Their Applications: An Overview

Pan, Zihe; Cheng, Fangqin; Zhao, Boxin

doi:10.3390/polym9120725

Cited by 51 publications

(32 citation statements)

References 234 publications

(540 reference statements)

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“…In the Cassie-Baxter state, air trapped in the grooves between surface features forms a composite (air/solid) hydrophobic surface, leading to a larger contact angle compared to the contact angle θ with a flat surface. In contrast, in the Wenzel state, the liquid on the surface enters the grooves, leading to higher surface wettability, due to the increase in contact area [7,39,40]. Therefore, it can be concluded from the Wenzel equation that surface roughness amplifies the wettability of the original surface.…”

Section: Wetting State Of a Real Solid Surfacementioning

confidence: 99%

Review on Blueprint of Designing Anti-Wetting Polymeric Membrane Surfaces for Enhanced Membrane Distillation Performance

2019

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Recently, membrane distillation (MD) has emerged as a versatile technology for treating saline water and industrial wastewater. However, the long-term use of MD wets the polymeric membrane and prevents the membrane from working as a semi-permeable barrier. Currently, the concept of antiwetting interfaces has been utilized for reducing the wetting issue of MD. This review paper discusses the fundamentals and roles of surface energy and hierarchical structures on both the hydrophobic characteristics and wetting tolerance of MD membranes. Designing stable antiwetting interfaces with their basic working principle is illustrated with high scientific discussions. The capability of antiwetting surfaces in terms of their self-cleaning properties has also been demonstrated. This comprehensive review paper can be utilized as the fundamental basis for developing antiwetting surfaces to minimize fouling, as well as the wetting issue in the MD process.

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Section: Wetting State Of a Real Solid Surfacementioning

confidence: 99%

Review on Blueprint of Designing Anti-Wetting Polymeric Membrane Surfaces for Enhanced Membrane Distillation Performance

2019

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“…The super-hydrophobic coating is a kind of coating with special surface wetting properties, its contact angle with water is greater than 150° and the rolling angle is less than 10° [ 6 , 7 , 8 ]. In 1997, W. Barthlott et al studied the self-cleaning ability of plants and discovered for the first time that there are micro-nano-scale rough structures on the surface of the lotus leaf, and proposed the lotus leaf effect [ 9 , 10 ]. The super-hydrophobic surface has the excellent self-cleaning ability and can quickly remove surface water [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Evaluation of Nano-TiO2 Superhydrophobic Coating on Asphalt Pavement

Lin

Wang

2021

Materials

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In order to address water damage of asphalt pavement, reduce the occurrence of water-related potholes, deformation, and other diseases, and improve the performance and service life of the pavement, a nano-TiO2 superhydrophobic coating (PSC) on asphalt pavement was prepared from waterborne polyurethane and nano-TiO2 modified by stearic acid. FT-IR measured stearic acid successfully modified low surface energy substance on the surface of nano-TiO2. The SEM image shows that the PSC has a rough surface structure. The contact angle and rolling angle of the PSC in the contact angle test are 153.5° and 4.7°, respectively. PSC has a super-hydrophobic ability, which can improve the water stability of the asphalt mixture. Although the texture depth and pendulum value have been reduced by 2.5% and 4.4%, respectively, they all comply with the standard requirements. After the abrasion resistance test, the PSC coating still has a certain hydrophobic ability. These results surface PSC coating can effectively reduce water damage on asphalt pavement, and has considerable application value.

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“…Since 1997, the German botanist Baethlott [31] reported that water droplets sit on lotus leaves with water contact angle larger than 150° and roll off easily carrying away the dust when tilting and this phenomenon is defined as the “lotus effect”. This extraordinary property is named as superhydrophobicity and self-cleaning [32,33,34]. Further investigation showed that lotus leaf is comprised of nano/microhierarchical structures and they are coated with low surface energy wax to reduce surface energy, thereby delivery superhydrophobicity and self-cleaning property (Figure 2a) [29,30].…”

Section: Introductionmentioning

confidence: 99%

Superwetting Polymeric Three Dimensional (3D) Porous Materials for Oil/Water Separation: A Review

2019

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Oil spills and the emission of oily wastewater have triggered serious water pollution and environment problems. Effectively separating oil and water is a world-wide challenge and extensive efforts have been made to solve this issue. Interfacial super-wetting separation materials e.g., sponge, foams, and aerogels with high porosity tunable pore structures, are regarded as effective media to selectively remove oil and water. This review article reports the latest progress of polymeric three dimensional porous materials (3D-PMs) with super wettability to separate oil/water mixtures. The theories on developing super-wetting porous surfaces and the effects of wettability on oil/water separation have been discussed. The typical 3D porous structures (e.g., sponge, foam, and aerogel), commonly used polymers, and the most reported techniques involved in developing desired porous networks have been reviewed. The performances of 3D-PMs such as oil/water separation efficiency, elasticity, and mechanical stability are discussed. Additionally, the current challenges in the fabrication and long-term operation of super-wetting 3D-PMs in oil/water separation have also been introduced.

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Bio-Inspired Polymeric Structures with Special Wettability and Their Applications: An Overview

Cited by 51 publications

References 234 publications

Review on Blueprint of Designing Anti-Wetting Polymeric Membrane Surfaces for Enhanced Membrane Distillation Performance

Review on Blueprint of Designing Anti-Wetting Polymeric Membrane Surfaces for Enhanced Membrane Distillation Performance

Fabrication and Evaluation of Nano-TiO2 Superhydrophobic Coating on Asphalt Pavement

Superwetting Polymeric Three Dimensional (3D) Porous Materials for Oil/Water Separation: A Review

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