Durable bonding of silica nanoparticles to polymers by photoradiation for control of surface properties

Nahum, T.; Dodiuk, H.; Dotan, A.; Kenig, S.; Lellouche, Jean‐Paul

doi:10.1002/pat.3276

Cited by 9 publications

(10 citation statements)

References 34 publications

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“…In a previous study, the functionalization of silica NPs by photo reactive benzophenone (BP) groups was carried out in order to covalently bond the NPs to polymer substrates with the objective to obtain durable coatings. The results have shown enhanced stability of the resultant hydrophobic coating by a layer of SiO 2 @BPh NPs and a top layer of fluoroalkylsilane.…”

Section: Resultsmentioning

confidence: 99%

“…Two basic features have to be combined to obtain durable superhydrophobicity. Thus, it is proposed to investigate the possibility to obtain robust hydrophobic topography by covalently binding silica NPs to a polymer base coating . Furthermore, a top layer of Fluor containing film will be studied for superhydrophobic chemistry.…”

Section: Methodsolgymentioning

confidence: 99%

“…In all cases, the loss of roughness led to unstable Cassie state and increased the area of contact between the water droplets and the surface . The creation of covalent bonding between the NPs and the substrate can ensure enhanced endurance and its implementation in practical applications . The objective of this work is to study the effect of ultraviolet (UV) chemistry on covalent bonding formation between silica NPs to UV cured polymers to obtain durable superhydrophobic coatings.…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic durable coating based on UV‐photoreactive silica nanoparticles

Nahum

Dodiuk

Dotan

et al. 2014

J of Applied Polymer Sci

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Superhydrophobic surfaces can be obtained by tailoring both the chemistry and roughness topography, mimicking the Lotus leaf characteristics. Most of the synthetic superhydrophobic surfaces reported have been composed of micro and nanoparticles (NPs) embedded in polymer‐based coatings. The particles which tailor the topography are bonded to the base polymers by weak secondary forces. Consequently, the topography integrity is highly affected by handling and surface drag making them unsuitable for long term applications. This work is focused on promoting covalent bonding between the NPs and the base polymer to obtain durable superhydrophobic surfaces. The rough topography was achieved by ultraviolet (UV) curing of SiO2 NPs containing a photoreactive benzophenone moiety in addition to methylated fumed silica NPs which can bind covalently to the polymer base coating, on UV radiation. The hydrophobic chemistry was obtained by fluoroalkylsilane top coating. Coating durability was evaluated using surface air drag and accelerated weathering conditions (UV radiation, humidity and temperature). Results indicated that the proposed approach resulted in superhydrophobic surfaces having high contact angle (>150°) and low sliding angle (<10°) with improved long term durability. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41122.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsolgymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic durable coating based on UV‐photoreactive silica nanoparticles

Nahum

Dodiuk

Dotan

et al. 2014

J of Applied Polymer Sci

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“…Thus, it is proposed to investigate the possibility to obtain robust hydrophobic topography by covalently binding silica NPs to a polymer base coating. 45,46 Furthermore, a top layer of Fluor containing film will be studied for superhydrophobic chemistry. Accordingly, a three layer structure could be obtained as shown schematically in Scheme 1.…”

Section: Methodsolgymentioning

confidence: 99%

“…44 The creation of covalent bonding between the NPs and the substrate can ensure enhanced endurance and its implementation in practical applications. 45 The objective of this work is to study the effect of ultraviolet (UV) chemistry on covalent bonding formation between silica NPs to UV cured polymers to obtain durable superhydrophobic coatings.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic durable coating based on UV-photoreactive silica nanoparticles

Nahum

Dodiuk

Dotan

et al. 2015

AIP Conference Proceedings

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Superhydrophobic surfaces can be obtained by tailoring both the chemistry and roughness topography, mimicking the Lotus leaf characteristics. Most of the synthetic superhydrophobic surfaces reported have been composed of micro and nanoparticles (NPs) embedded in polymer-based coatings. The particles which tailor the topography are bonded to the base polymers by weak secondary forces. Consequently, the topography integrity is highly affected by handling and surface drag making them unsuitable for long term applications. This work is focused on promoting covalent bonding between the NPs and the base polymer to obtain durable superhydrophobic surfaces. The rough topography was achieved by ultraviolet (UV) curing of SiO 2 NPs containing a photoreactive benzophenone moiety in addition to methylated fumed silica NPs which can bind covalently to the polymer base coating, on UV radiation. The hydrophobic chemistry was obtained by fluoroalkylsilane top coating. Coating durability was evaluated using surface air drag and accelerated weathering conditions (UV radiation, humidity and temperature). Results indicated that the proposed approach resulted in superhydrophobic surfaces having high contact angle (>150 ) and low sliding angle (<10 ) with improved long term durability.

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