Self-cleaning of Surfaces: the Role of Surface Wettability and Dust Types

Quan, Yun-Yun; Zhang, Li‐Zhi; Qi, Ronghui; Cai, Rong-Rong

doi:10.1038/srep38239

Cited by 117 publications

(51 citation statements)

References 31 publications

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“…Solid films with controllable surface wettability have been attracted considerable attention because of their advantages in various applications such as self‐cleaning materials, thermally responsive filters, nanoscale device . Surface wettability is mainly dependent on their chemical composition and geometrical microstructures .…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of multifunctional poly(amide‐imide)/polyaniline films: Combining self‐cleaning, self‐extinguishing, and conductive

Wang

et al. 2018

Polymer Engineering & Sci

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Recently, multifunctional films are of particular interest to scientists owing to their diversified properties. Here, we demonstrated that self‐cleaning, self‐extinguishing, and high conductive films were fabricated by simple solvent‐casting method from poly(amide‐imide)/polyaniline composites. The multifunctional films exhibited controllable water contact angles varying from 65° to 120° and high electrical conductivities of over 40 S m−1. Moreover, due to the improved hydrophobicity, the multifunctional films showed self‐cleaning characteristics and were used to collect the dust powders easily and perfectly during the dispensed water droplet rolling off the solid surface. Furthermore, the self‐extinguishing property of the multifunctional films was confirmed by thermogravimetric analysis. The special film composition and morphology are the two important aspects that induce such unusual properties. The polyaniline content can strongly influence the morphology of the composite films, which in turn display different hydrophobicities and conductivities. POLYM. ENG. SCI., 59:E33–E43, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Facile preparation of multifunctional poly(amide‐imide)/polyaniline films: Combining self‐cleaning, self‐extinguishing, and conductive

Wang

et al. 2018

Polymer Engineering & Sci

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“…Wettability describes the spreading of a liquid on a surface, and is one of the important characteristics of a solid surface [1]. Wettability has been widely used in many industries, such as surface self-cleaning [2][3][4], antibacterial products [5], fluid drag reduction [6], inkjet printing [7,8], anti-fouling products [9], anti-adhesives [10], and environmental applications [11]. Moreover, surface wettability plays an important role in boiling and condensation, such as in homogeneous nucleation, vapor condensation, and bubble growth [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…proposed a contact-angle prediction theory for practical surfaces, and the wetting model is shown in Figure 1b. cos θ * W = r cos θ Y (2) where r represents the roughness and is defined as the ratio of the true surface area to the projected surface area, namely r ≥ 1. The Wenzel theory assumes that the liquid is in full contact with the rough structure on the solid surface.…”

Section: Introductionmentioning

confidence: 99%

The Wettability and Numerical Model of Different Silicon Microstructural Surfaces

Han

Yang²,

et al. 2019

Applied Sciences

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Wettability is an important property of solid surfaces and is widely used in many industries. In this work, seven silicon microstructure surfaces were made by plasma immersion ion implantation (PIII) technology. The experimental contact angles and theoretical contact angles of various surfaces were compared, which indicated that the classical theory had great limitations in predicting the static contact angles of complex structures. A parameterized microstructure surface was established by computational fluid dynamics (CFD) with a volume-of-fluid (VOF) model to analyze the reasons for the differences between experimental and theoretical contact angles. Comparing the results of experiments and simulations, it was found that the VOF model can simulate the contact angle of these surfaces very well. The geometrical models of the different microstructures were simplified, and waveforms of the surfaces were obtained.

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“…A surface that exhibits a WCA more than 150° with a sliding angle (SA) less than 10° is commonly called superhydrophobic surface [1,2]. Such surface is always self-cleaned by the enrolling water droplet and received significant attention in several applications, such as antifouling, self-cleaning, anti-friction, oil/water separation.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of surface-functionalized PUA composites to achieve superhydrophobicity

Hou

Shanmugasundaram

Nguyen

2019

Micro and Nano Syst Lett

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Herein, we present a facile fabrication method to prepare the optically transparent, flexible and self-cleanable poly(urethane acrylate) (PUA) superhydrophobic film. The low surface energy siloxane functionalization on the thermally activated µ-patterned PUA/graphene oxide composite (S-PG) was found to be a successful strategy to modify the PUA intrinsic hydrophilicity into superhydrophobic nature. The S-PG film (with GO content of 0.1 wt%) repeatedly showed the water contact angle (WCA) of 149.82 ± 1° with excellent self-cleaning property. Further, the fabricated film exhibited high optical transparency (80%) in the 400-800 nm wavelength region. Finally, the practical applicability of the fabricated S-PG film was demonstrated by using the film as a protective layer for solar panel module. The power conversion efficiency (PCE) of the solar module with and without S-PG superhydrophobic film was found to be 5.98% and 5.82%, respectively. The enhancement in the PCE performance of the solar module is attributed to the excellent optical transparent and less light reflecting nature of the proposed film. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Publisher's NoteSpringer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Self-cleaning of Surfaces: the Role of Surface Wettability and Dust Types

Cited by 117 publications

References 31 publications

Facile preparation of multifunctional poly(amide‐imide)/polyaniline films: Combining self‐cleaning, self‐extinguishing, and conductive

Facile preparation of multifunctional poly(amide‐imide)/polyaniline films: Combining self‐cleaning, self‐extinguishing, and conductive

The Wettability and Numerical Model of Different Silicon Microstructural Surfaces

Fabrication of surface-functionalized PUA composites to achieve superhydrophobicity

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