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231224s2011 xx |||||o 00| ||eng c |
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7 |
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|a 10.1021/la104978e
|2 doi
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|a pubmed24n0689.xml
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|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Pisuchpen, Thanarath
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Tuning hydrophobicity and water adhesion by electrospinning and silanization
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 13.07.2011
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|a Date Revised 30.03.2011
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Electrospinning and silanization were synergistically employed to fabricate poly(vinyl alcohol) (PVA) and PVA/silica mixtures into flexible and chemically modifiable nanostructured surfaces with varying degrees of hydrophobicity and water adhesion. Surfaces possessing the greatest advancing water contact angle yet exhibiting a high level of water adhesion (θ(A)/θ(R) ≈ 168°/0°) were achieved by the reaction of PVA fiber mats with multiple cycles of SiCl(4)/H(2)O treatment, followed by silanization with (1H,1H,2H,2H-perfluorooctyl)trichlorosilane. It is postulated that the strong pinning effect and hence the water adhesion originated from the collapse of the underlying fibrous structures and the removal of air pockets. The addition of silica to the PVA matrix improved the rigidity and thus prevented the fibers from collapsing, allowing air to remain trapped within the fibrous structure and giving the surface greater water repellency. Throughout the investigation, the three wetting models--Wenzel's, Cassie-Baxter's, and the Cassie-impregnating--were regularly referred to as a conceptual framework. The hydrophobic surface that exhibited strong water adhesion, or the so-called "Petal effect", was elucidated in correlation with the fibrous structure of the film, as reviewed by microscopic analysis. In summary, electrospinning as a facile and cost-effective method provides promising opportunities for investigating the mechanistic character of nanowetting, nanoprinting, and nanocoating where the precise control of the dynamical three-phase contact line is of paramount importance
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|a Journal Article
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1 |
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|a Chaim-ngoen, Navarun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Intasanta, Narupol
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Supaphol, Pitt
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hoven, Voravee P
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 7 vom: 05. Apr., Seite 3654-61
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
8 |
|g volume:27
|g year:2011
|g number:7
|g day:05
|g month:04
|g pages:3654-61
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|u http://dx.doi.org/10.1021/la104978e
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