Bioinspired fog capture and channel mechanism based on the arid climate plant Salsola crassa

Gürsoy, Mehmet; Harris, Matt; Downing, J.O.; Barrientos-Palomo, S.N.; Carletto, Andrea; Yaprak, Ahmet Emre; Karaman, Mustafa; Badyal, J. P. S.

doi:10.1016/j.colsurfa.2017.05.071

Cited by 48 publications

(26 citation statements)

References 28 publications

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“…The thicknesses of both polymers on the Si surface is around 200 nm. In the literature, iCVD of PPFDA has been widely studied, and it was revealed that the long perfluoroalkyl groups of PFDA has natural tendencies to reorient themselves to form large crystalline structures . This can be the most probable reason behind the observation of increased surface roughness for PPFDA films.…”

Section: Resultsmentioning

confidence: 99%

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Çıtak

İstanbullu

Şakalak

et al. 2019

Macro Chemistry & Physics

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In this study, the successful transfer of chemical vapor deposition (CVD)‐grown graphene on an ordinary printing paper surface is demonstrated. Pristine paper is not a suitable substrate for graphene transfer because of its fragile and hydrophilic nature against the chemicals used during the transfer process. Two different fluoroalkyl polymers, namely poly(hexafluorobutyl acrylate) (PHFBA) and poly(perfluorodecyl acrylate) (PPFDA) are coated on paper surfaces by an initiated CVD (iCVD) technique to make the paper surfaces hydrophobic. Hydrophobicity is found to be an important factor in order for the graphene to be transferred onto the paper substrate. Although surfaces coated with PPFDA possess better hydrophobicity owing to their longer perfluoroalkyl group and higher roughness, the graphene transfer is found to be more successful on a PHFBA‐coated surface. A thin film of PHFBA on the paper surface acts as a prime layer for effective and defect‐free transfer of graphene and makes the paper surface ideal and robust during the graphene transfer process. The as‐transferred graphene layer on the PHFBA‐coated paper surface shows high conductivity values, even after repeated folding and flattening cycles.

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Section: Resultsmentioning

confidence: 99%

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

Çıtak

İstanbullu

Şakalak

et al. 2019

Macro Chemistry & Physics

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“…There are several studies conducted to compare the efficiency of both methods for a specific application [ 14 , 15 ]. In this work, we intend to employ both methods to functionalize the PU foam surfaces and compare the resultant modified foams, particularly for the oil absorption process.…”

Section: Introductionmentioning

confidence: 99%

A Green Approach to Modify Surface Properties of Polyurethane Foam for Enhanced Oil Absorption

Roslan

Lau

et al. 2020

Polymers

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The non-selective property of conventional polyurethane (PU) foam tends to lower its oil absorption efficiency. To address this issue, we modified the surface properties of PU foam using a rapid solvent-free surface functionalization approach based on the chemical vapor deposition (CVD) method to establish an extremely thin yet uniform coating layer to improve foam performance. The PU foam was respectively functionalized using different monomers, i.e., perfluorodecyl acrylate (PFDA), 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA), and hexamethyldisiloxane (HMDSO), and the effect of deposition times (1, 5 and 10 min) on the properties of foam was investigated. The results showed that all the modified foams demonstrated a much higher water contact angle (i.e., greater hydrophobicity) and greater absorption capacities compared to the control PU foam. This is due to the presence of specific functional groups, e.g., fluorine (F) and silane (Si) in the modified PU foams. Of all, the PU/PHFBAi foam exhibited the highest absorption capacities, recording 66.68, 58.15, 53.70, and 58.38 g/g for chloroform, acetone, cyclohexane, and edible oil, respectively. These values were 39.19–119.31% higher than that of control foam. The promising performance of the PU/PHFBAi foam is due to the improved surface hydrophobicity attributed to the original perfluoroalkyl moieties of the HFBA monomer. The PU/PHFBAi foam also demonstrated a much more stable absorption performance compared to the control foam when both samples were reused for up to 10 cycles. This clearly indicates the positive impact of the proposed functionalization method in improving PU properties for oil absorption processes.

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“…Fluoropolymer thin films are one of the most commonly used hydrophobic coatings 48–52 . However, the effect of fluorochemicals on human health and the environment is increasingly recognized as a serious, worldwide concern 53 .…”

Section: Resultsmentioning

confidence: 99%

“…Fluoropolymer thin films are one of the most commonly used hydrophobic coatings. [48][49][50][51][52] However, the effect of fluorochemicals on human health and the environment is increasingly recognized as a serious, worldwide concern. 53 Based on the wettability results of PECVD PI thin film in this study, PI thin film can be considered as a promising alternative to fluoropolymers.…”

Section: Film Structuresmentioning

confidence: 99%

Vapor deposition polymerization of synthetic rubber thin film in a plasma enhanced chemical vapor deposition reactor

Gürsoy

2020

J of Applied Polymer Sci

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Rubber is one of the most commonly used industrial materials worldwide. However, there is a gap in the literature on the production of rubber thin films in nanoscale. When the rubber thin films are produced in nanoscale, they can be used in high-tech applications where bulk rubbers have never been used before. This study is one of the first investigations to focus on the vapor-based production of the polyisoprene (PI), which is an important member of the synthetic rubber class. For this purpose, a single-step, rapid and environmentally friendly method based on plasma enhanced chemical vapor deposition (PECVD) was employed to produce PI thin films using 2-methyl-1,3-butadiene (isoprene). The high-vapor pressure of isoprene makes it a promising monomer for the production of chemical vapor deposition polymers. The effect of plasma processing parameters on the PI deposition rate was investigated. The deposition rate of PI thin film as high as 40 nm/min was achieved and the contact angle of PI coated bamboo surface was found to be 146.8. The mechanical durability and laundering tests of PI thin films were performed. Based on this study results, PI thin films produced by PECVD can be used in a number of potential applications.

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Bioinspired fog capture and channel mechanism based on the arid climate plant Salsola crassa

Abstract: q¤ ursoyD wF nd rrrisD wFF nd howningD tFyF nd frrientosElomoD FxF nd grlettoD eF nd prkD eFiF nd urmnD wF nd fdylD tFFF @PHIUA 9fioinspired fog pture nd hnnel mehnism sed on the rid limte plnt lsol rssF9D golloids nd surfes e X physiohemil nd engineering spetsFD SPW F ppF IWSEPHPF

Cited by 48 publications

References 28 publications

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

All‐Dry Hydrophobic Functionalization of Paper Surfaces for Efficient Transfer of CVD Graphene

A Green Approach to Modify Surface Properties of Polyurethane Foam for Enhanced Oil Absorption

Vapor deposition polymerization of synthetic rubber thin film in a plasma enhanced chemical vapor deposition reactor

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