Formation of Nanoporous Polycarbonate Surfaces and Their Chemical Modification for Superhydrophobicity

Go, Seungcheol; Han, Moon‐Hee; Ahn, Younghyun

doi:10.5012/bkcs.2012.33.11.3899

Cited by 11 publications

(13 citation statements)

References 27 publications

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“…It was found that the dipping duration is very critical for maintaining the optical properties of the material to be useful in the photovoltaic solar panels. Different periods of immersion in dichloromethane were carried out and it was found that after 2 s immersion the PC glass maintains 80% transmittance as in Figure 1 and drops drastically after that which is in agreement with results from [14]. Therefore, a 2 s immersion duration in DCM is considered for all the experiments.…”

Section: Resultssupporting

confidence: 81%

“…However, a long immersion period (i.e., 30 min) was required to create a superhydrophobic surface, which introduces the possibility of deformation of the PC plate or the formation of powder on the surface by the recrystallization of PC after solvent evaporation and the significant reduction in optical properties. Recently, Go et al [14] tried different organic solvents such as CH 2 Cl 2 , methyl ethyl ketone, ethyl acetate, toluene, and isopropyl alcohol and found that only CH 2 Cl 2 generated nanoporous structures in a short period (5 s). They further silanize the surface to yield a superhydrophobic surface with contact angle of 161 ∘ .…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

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Directed Hierarchical Patterning of Polycarbonate Bisphenol A Glass Surface along Predictable Sites

Khaled

2015

Journal of Nanomaterials

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This paper reports a new approach in designing textured and hierarchical surfaces on polycarbonate bisphenol A type glass to improve hydrophobicity and dust repellent application for solar panels. Solvent- and vapor-induced crystallization of thermoplastic glass polycarbonate bisphenol A (PC) is carried out to create hierarchically structured surfaces. In this approach dichloromethane (DCM) and acetone are used in sequence. Samples are initially immersed in DCM liquid to generate nanopores, followed by exposing to acetone vapor resulting in the generation of hierarchical structure along the interporous sites. The effects of exposure time on the size, density, and distance of the generated spherules and gaps are studied and correlated with the optical transmittance and contact angle measurements at the surface. At optimized exposure time a contact angle of 98° was achieved with 80% optical transmittance. To further increase the hydrophobicity while maintaining optical properties, the hierarchical surfaces were coated with a transparent composite of tetraethyl orthosilicate as precursor and hexamethyldisilazane as silylation agent resulting in an average contact angle of 135.8° and transmittance of around 70%. FTIR and AFM characterization techniques are employed to study the composition and morphology of the generated surfaces.

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Section: Resultssupporting

confidence: 81%

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

Directed Hierarchical Patterning of Polycarbonate Bisphenol A Glass Surface along Predictable Sites

Khaled

2015

Journal of Nanomaterials

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“…This is associated with the varying nucleation density due to non-uniform cooling rates at the surface. Although crystal size varies at the surface, large size crystals do not form due to the high cooling rates unlike those reported for other crystallization processes [23,33]. Fig.…”

Section: Resultsmentioning

confidence: 68%

Wetting and other physical characteristics of polycarbonate surface textured using laser ablation

Yilbaş

Khaled

Abu-Dheir

et al. 2014

Applied Surface Science

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“…Micro-/nanoscale of surface roughness have been fabricated using a number of approaches, such as lithography, 5 etching, 6 immersion processing, 7 sol-gel methods, 8 and chemical vapor deposition. 9 Functional fabrics, such as winter clothes as well as water-repellent, and biodegradable clothing, are gaining increased popularity. Typically, cotton fibers are interwoven with cellulose fibers, which contain numerous surface hydroxyl groups, so that the resulting cotton fabric is superhydrophilic and highly wettable.…”

Section: -4mentioning

confidence: 99%

Fabrication of Superhydrophobic Surface on a Cellulose-based Material via Chemical Modification

Lee¹,

Hwang²,

Ahn³

2014

Bulletin of the Korean Chemical Society

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Superhydrophobicity is an interesting surface property underlying several fascinating natural phenomena, such as the self-cleaning ability of lotus leaves and the striding ability of spiders, which have attracted much interest in the industry and academia. A superhydrophobic surface is that on which the water contact angle (WCA) is higher than 150 o and the water sliding angle is lower than 10 o , hence, water droplets can easily slide/run off the surface. This principle of high water repellence of a superhydrophobic surface can be extended to practical applications, for example, to develop coatings for automobile windows, tiles, buildings, and clothes.

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Formation of Nanoporous Polycarbonate Surfaces and Their Chemical Modification for Superhydrophobicity

Cited by 11 publications

References 27 publications

Directed Hierarchical Patterning of Polycarbonate Bisphenol A Glass Surface along Predictable Sites

Directed Hierarchical Patterning of Polycarbonate Bisphenol A Glass Surface along Predictable Sites

Wetting and other physical characteristics of polycarbonate surface textured using laser ablation

Fabrication of Superhydrophobic Surface on a Cellulose-based Material via Chemical Modification

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