Superhydrophobic Properties of Nanotextured Polypropylene Foils Fabricated by Roll-to-Roll Extrusion Coating

Telecka, Agnieszka; Murthy, Swathi; Schneider, Ling; Pranov, Henrik; Taboryski, Rafael J.

doi:10.1021/acsmacrolett.6b00550

Cited by 33 publications

(33 citation statements)

References 44 publications

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“…The relative size of the pillar cavities in the stamp and the layer thickness in the sketches are to scale. Unlike the nano-sized structures shown in Murthy et al 2 and Telecka et al 8 , the micro-pillars replicate best at lower speeds. As seen in Figure 2, in the diagonal direction, where the thickness is kept constant, the velocity still has a negative impact on the filling.…”

Section: Resultsmentioning

confidence: 54%

“…The applications possibilities are endless, however it is important to understand the replication process, investigate its parameters and understand the limitations of this method. While the replication of nano-grass structures in PP with a hydrophobic effect was studied by Telecka et al 8 , an investigation of the replication of micro-patterns can lead us one step further towards building hierarchical structures for superhydrophobic self-cleaning foils.…”

Section: Introductionmentioning

confidence: 99%

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Replication of micro-sized pillars in polypropylene using the extrusion coating process

Okulova

Johansen²,

Christensen³

et al. 2017

Microelectronic Engineering

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A recent advancement in nano-pattern replication using roll-to-roll extrusion coating (R2R-EC) shows potential for many biomimetic applications. For further development of the technique a study of the micro-replication regime is executed. In this study a full and partial replication in polypropylene (PP) of micro-sized pillars has been demonstrated using the extrusion coating process. The replication fidelity of the pillars is investigated in a systematic variation of different process parameters: the line-speed of the rolls, the extruder output, the cooling roll temperature and the pressure on the cooling roll. The parameter making biggest impact on the replication is the temperature of the cooling roll. The micro-sized pillars show replication behavior opposite to what was found previously for the nano-patterns. The larger structures take the time to fill in and replicate best at the lower speeds. In this article a direct comparison of the speed at the same coating thickness is conducted.

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Section: Resultsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Replication of micro-sized pillars in polypropylene using the extrusion coating process

Okulova

Johansen²,

Christensen³

et al. 2017

Microelectronic Engineering

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“…The fabrication process consists of the following steps: (i) fabrication of master structures on silicon The RIE process parameters, such as the flow rates of the etching gas (SF 6 and/or CH 4 ) and passivating gas (O 2 ), can be varied to produce black silicon nanostructures of different dimensions [45,75]. The effect of geometry variations, i.e., height and diameter of the hemispheroid structures, on EOF was investigated by numerical simulations (refer to Section 2.3).…”

Section: Discussionmentioning

confidence: 99%

“…The structures are produced by reactive ion etching (RIE) through the combined effect of an etching gas (SF 6 and/or CH 4 ) and a passivating gas (O 2 ) [44][45][46]. Hitherto, no investigation has been carried out with RIE for the creation of large-area nanostructures within microchannel.…”

Section: Introductionmentioning

confidence: 99%

<strong>ELECTROOSMOTIC FLOW IN MICROCHANNEL WITH </strong><strong>BLACK SILICON NANOSTRUCTURES</strong>

Lim

Lam

et al. 2017

Proceedings of the 7th International Multidisciplinary Conference on Optofluidics 2017

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Abstract:Although electroosmotic flow (EOF) has been applied to drive fluid flow in microfluidic chips, some of the phenomena associated with it can adversely affect the performance of certain applications such as electrophoresis and ion preconcentration. To minimize the undesirable effects, EOF can be suppressed by polymer coatings or introduction of nanostructures. In this work, we presented a novel technique that employs the Dry Etching, Electroplating and Molding (DEEMO) process along with reactive ion etching (RIE), to fabricate microchannel with black silicon nanostructures (prolate hemispheroid-like structures). The effect of black silicon nanostructures on EOF was examined experimentally by current monitoring method, and numerically by finite element simulations. The experimental results showed that the EOF velocity was reduced by 13 ± 7%, which is reasonably close to the simulation results that predict a reduction of approximately 8%. EOF reduction is caused by the distortion of local electric field at the nanostructured surface. Numerical simulations show that the EOF velocity decreases with increasing nanostructure height or decreasing diameter. This reveals the potential of tuning the etching process parameters to generate nanostructures for better EOF suppression. The outcome of this investigation enhances the fundamental understanding of EOF behavior, with implications on the precise EOF control in devices utilizing nanostructured surfaces for chemical and biological analyses.

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“…The objective of this article was to fabricate reentrant structures on a polymer sheet using the R2R hot embossing (R2R‐HE) process. This process differs from the R2R UV‐assisted nanoimprint lithography and R2R extrusion coating processes, which have been effectively used for creating surface structures but have not been used to create reentrant structures.…”

Section: Introductionmentioning

confidence: 99%

Continuous manufacturing of reentrant structures via roll‐to‐roll process

Shivaprakash

Zhang

Panwar

et al. 2018

J of Applied Polymer Sci

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Reentrant structures have been deemed necessary for repelling low‐surface‐tension liquids. In this article, a novel manufacturing methodology using the roll‐to‐roll process to enable continuous manufacturing of reentrant structures over large areas on a polymeric film was demonstrated. A two‐stage process, composed of embossing followed by post‐compression, allowed the fabrication of reentrant structures, which cannot be easily fabricated using other processes over large areas in a continuous manner. The treatment of the reentrant surface structures with an additional coating of 1H,1H,2H,2H‐perfluorooctyltrichlorosilane layer provided liquid repellency with contact angles of 155 and 140°, respectively, for water (Ylv = 72 mN m−1) and diiodomethane (Ylv = 50 mN m−1). © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46980.

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Superhydrophobic Properties of Nanotextured Polypropylene Foils Fabricated by Roll-to-Roll Extrusion Coating

Cited by 33 publications

References 44 publications

Replication of micro-sized pillars in polypropylene using the extrusion coating process

Replication of micro-sized pillars in polypropylene using the extrusion coating process

<strong>ELECTROOSMOTIC FLOW IN MICROCHANNEL WITH </strong><strong>BLACK SILICON NANOSTRUCTURES</strong>

Continuous manufacturing of reentrant structures via roll‐to‐roll process

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