Novel liquid–solid adhesion superhydrophobic surface fabricated using titanium dioxide and trimethoxypropyl silane

Ramanathan, Rajajeyaganthan; Weibel, Daniel Eduardo

doi:10.1016/j.apsusc.2012.04.140

Cited by 26 publications

(11 citation statements)

References 40 publications

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“…In contrast to what was observed with untreated CNFs, the fibers modified with MTMS and PTMS, reagents known to deliver superhydrophobic coatings, had systematically lower initial mass losses as more extensive siloxane coatings (see our previous study) were delivered to the CNF surface (see Table ). As considerable effort was taken to anneal, rinse, and dry each Si‐CNF (see Supporting Information), we attribute these mass losses to adsorbed atmospheric water after they had been dried and equilibrated with the atmosphere during open‐air storage.…”

Section: Resultscontrasting

confidence: 66%

Engineering Lignocellulose Fibers with Higher Thermal Stability through Natural Fiber Welding

Durkin

Frank

Haverhals³

et al. 2019

Macro Materials & Eng

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This study reveals how natural fiber welding (NFW) can be used to engineer biopolymer materials with improved thermal stability. First, it is shown how NFW without binders improves lignocellulose yarn thermal stability by ≈17 °C, primarily by condensing microfibril structure. Next, silanized‐cellulose nanofibrils (Si‐CNFs) are developed as NFW binders; this silanization process alters CNF physical and thermal properties. During pyrolysis, Six Oy networks form, which delay CNF decomposition (up to 37 °C), slow cellulose mass loss rates (up to 89%), and can enhance char yield more than twofold. When used as NFW binders, Si‐CNFs increase lignocellulose yarn thermal stability (up to 17 °C) proportional to siloxane amount, and can reduce cellulose mass loss rates (≈25% compared to welding without binder). These exciting results highlight the potential of NFW as a green‐engineering process to transform natural fibers into more thermally stable, biocomposite textile yarns.

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Section: Resultscontrasting

confidence: 66%

Engineering Lignocellulose Fibers with Higher Thermal Stability through Natural Fiber Welding

Durkin

Frank

Haverhals³

et al. 2019

Macro Materials & Eng

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“…Water and ethanol solvents did not produce an appreciable dissolution of the PP surface, leaving many open regions of untreated PP that led to a final WCA lower than 150 o . TiO 2 NPs formed aggregates on the PP surfaces when water or ethanol suspensions were used, which is similar to results observed in our previous publications on glass and silicon substrates …”

Section: Resultssupporting

confidence: 90%

“…Xylene (mixture of isomers) and ethanol were purchased from Merck (Brazil). TiO 2 NPs obtained from Degussa Corporation: AEROXIDE® TiO 2 ‐P25 were functionalised using a previously published procedure . Briefly, NPs with a concentration of 0.5% or 1.0% (% w/v) were immersed in suspensions containing a solvent/TMPSi solution ratio of 95/5% (v/v).…”

Section: Experimental Partmentioning

confidence: 99%

“…TiO 2 is a very important material and can be used in many kinds of industrial applications such as solar cells, photocatalysis, photovoltaic devices and pigments, and it is one of the most widely‐used compounds in developing reversible wettability . Ramanathan et al . prepared superhydrophobic surfaces using TiO 2 NPs on glass and metallic substrates, thus increasing the WCA between the substrate and the water drop.…”

Section: Introductionmentioning

confidence: 99%

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Development of Poly(propylene) Superhydrophobic Surfaces by Functionalised TiO₂ Nanoparticles: Effect of Solvents and Dipping Times

Chagas

Weibel

2014

Macromolecular Symposia

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Summary We present a simple strategy for the fabrication of poly(propylene) (PP) superhydrophobic surfaces, i.e., surfaces that show water contact angle (WCA) ≥ 150° after a simple dipping process. Injection‐moulded PP samples were coated with titanium dioxide nanoparticles previously functionalised with trimethoxy propyl silane. Water, ethanol or xylene were used as solvents in the nanoparticles' suspensions. The prepared superhydrophobic surfaces were characterised by WCA, FTIR‐ATR, SEM and profilometry measurements. PP coated samples showed very low wettability, with WCAs higher than 150° when xylene was used as a solvent. The combination of increasing the surface roughness via dipping coating process plus the low surface tension of the coating produced the final superhydrophobic PP substrates.

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“…The surface morphology was observed using a confocal microscope (VK-X200 series, Keyence, Osaka, Japan) and a scanning electron microscope (SEM, JSM-7600F, JEOL, Tokyo, Japan). In order to provide a low surface energy on a polymer surface with nanoscale structures, the polymer surface with microscale groove patterns was coated by dip coating with silanization using ethanol, silane (1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane), and the commercially-available anatase TiO 2 nanoparticles (5430MR, Nanostructured and Amorphous Materials Inc., Houston, TX, USA) with average particle size of 15 nm and the 99% purity at a mass ratio of 99:0.5:0.5 wt %, respectively [30][31][32][33][34][35]. The sample preparation procedures are summarized in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of an Anisotropic Superhydrophobic Polymer Surface Using Compression Molding and Dip Coating

et al. 2017

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Many studies of anisotropic wetting surfaces with directional structures inspired from rice leaves, bamboo leaves, and butterfly wings have been carried out because of their unique liquid shape control and transportation. In this study, a precision mechanical cutting process, ultra-precision machining using a single crystal diamond tool, was used to fabricate a mold with microscale directional patterns of triangular cross-sectional shape for good moldability, and the patterns were duplicated on a flat thermoplastic polymer plate by compression molding for the mass production of an anisotropic wetting polymer surface. Anisotropic wetting was observed only with microscale patterns, but the sliding of water could not be achieved because of the pinning effect of the micro-structure. Therefore, an additional dip coating process with 1H, 1H, 2H, 2H-perfluorodecythricholosilanes, and TiO 2 nanoparticles was applied for a small sliding angle with nanoscale patterns and a low surface energy. The anisotropic superhydrophobic surface was fabricated and the surface morphology and anisotropic wetting behaviors were investigated. The suggested fabrication method can be used to mass produce an anisotropic superhydrophobic polymer surface, demonstrating the feasibility of liquid shape control and transportation.

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Novel liquid–solid adhesion superhydrophobic surface fabricated using titanium dioxide and trimethoxypropyl silane

Cited by 26 publications

References 40 publications

Engineering Lignocellulose Fibers with Higher Thermal Stability through Natural Fiber Welding

Engineering Lignocellulose Fibers with Higher Thermal Stability through Natural Fiber Welding

Development of Poly(propylene) Superhydrophobic Surfaces by Functionalised TiO₂ Nanoparticles: Effect of Solvents and Dipping Times

Fabrication of an Anisotropic Superhydrophobic Polymer Surface Using Compression Molding and Dip Coating

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Novel liquid–solid adhesion superhydrophobic surface fabricated using titanium dioxide and trimethoxypropyl silane

Cited by 26 publications

References 40 publications

Engineering Lignocellulose Fibers with Higher Thermal Stability through Natural Fiber Welding

Engineering Lignocellulose Fibers with Higher Thermal Stability through Natural Fiber Welding

Development of Poly(propylene) Superhydrophobic Surfaces by Functionalised TiO2 Nanoparticles: Effect of Solvents and Dipping Times

Fabrication of an Anisotropic Superhydrophobic Polymer Surface Using Compression Molding and Dip Coating

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Product

Resources

About

Development of Poly(propylene) Superhydrophobic Surfaces by Functionalised TiO₂ Nanoparticles: Effect of Solvents and Dipping Times