Tailored surface properties of semi-fluorinated block copolymers by electrospinning

Valtola, Lauri; Koponen, Anu; Karesoja, Mikko; Hietala, Sami; Laukkanen, Antti; Tenhu, Heikki; Denifl, Peter

doi:10.1016/j.polymer.2009.04.078

Cited by 45 publications

(44 citation statements)

References 27 publications

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“…The use of low surface energy block copolymers to surface modify fibres produced by electrospinning will be subject to the same limitations. The potential problems associated with electrospinning block copolymers was further demonstrated by Valtola 24 who synthesised (by atom transfer radical polymerisation) low molecular weight block copolymers (M n < 15,000 gmol -1 ) in which one block was polystyrene and the other block comprised of one of four fluorinated monomers. The molecular weight, composition and choice of fluorinated monomer was varied but in all cases a combination of the low molecular weight and the tendency of the copolymers to aggregate resulted in the formation of 10-20 μm particles rather than fibres, although contact angles in some cases exceeded 150 degrees.…”

Section: Introductionmentioning

confidence: 99%

Electrospinning Superhydrophobic Fibers Using Surface Segregating End-Functionalized Polymer Additives

et al. 2011

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. (2011) 'Electrospinning superhydrophobic bers using surface segregating end-functionalized polymer additives. ', Macromolecules., 44 (16). pp. 6461-6470. Further information on publisher's website:http://dx.doi.org/10.1021/ma200852zPublisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Macromolecules, copyright c 2011 American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/ma200852z. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. RECEIVED DATE (to be automatically inserted after your manuscript is accepted if requiredaccording to the journal that you are submitting your paper to) † Chemistry Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.ABSTRACT: We describe here a facile route for the in situ modification of the surface properties of fibres produced by electrospinning polystyrene containing small quantities of compatible polymer additives, end functionalized with 1-3 fluoroalkyl groups. Such additives undergo spontaneous surface segregation during the electrospinning process resulting in fibres with low surface energy, fluorine rich, superhydrophobic surfaces. Surface properties were analyzed using static contact angle measurements (with water as the contact fluid) and X-ray photoelectron spectroscopy. We report the effect of a number of parameters on the surface properties of the resulting polystyrene fibres including the molecular weight and concentration of functionalized additive, the number of fluoroalkyl groups, the effect of annealing and spinning solvent. The majority of the fibres were successfully produced using THF as the spinning 2 solvent and fibres with a contact angle of approximately 150 degrees were attainable. However, preliminary investigations using a blend of polystyrene and 4% by weight of such an additive, endfunctionalized with 3 C 8 F 17 group in a mixed solvent of DMF/THF (3:1 v/v) resulted in a mat of fibres with a superhydrophobic surface and a contact angle of 158 degrees.

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Section: Introductionmentioning

confidence: 99%

Electrospinning Superhydrophobic Fibers Using Surface Segregating End-Functionalized Polymer Additives

et al. 2011

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“…The synthesis of the semifluorinated polystyrene-blockpolypentafluorostyrene copolymer, PS-b-PFS, via Atom Transfer Radical Polymerization (ATRP) has been published earlier [29]. The polymer used, PS 74 -b-PFS 74 was characterized by SEC and NMR.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and lectin recognition of glycosylated amphiphilic nanoparticles

Valtola

Rahikkala

Raula

et al. 2014

European Polymer Journal

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“…If the roughness of such films is increased, superhydrophobic or superoleophobic surfaces can be realised. For example electrospinning of semifluorinated copolymers can lead to such superhydrophobic surfaces, even in the case where the fluorinated polymer is used only as a minor component in a blend with a homopolymer of the other block . In electrospinning the polymers form fibres or particles that increase the roughness of the surface.…”

Section: Introductionmentioning

confidence: 99%

Breath figure templated semifluorinated block copolymers with tunable surface properties and binding capabilities

Valtola

Karesoja

Tenhu

et al. 2014

J of Applied Polymer Sci

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Patterning of functionalized polymeric surfaces enables the adjustment of their characteristics and use in novel applications. We prepared breath figure (BF) films from three semifluorinated diblock copolymers, which all are composed of a polystyrene block and a semifluorinated one to compare their surface properties. “Click” chemistry was employed to one of the polymers, containing a poly(pentafluorostyrene) block to incorporate hydrophilic sugar or carboxylic acid moieties. The structure of the polymer alters the obtained porous morphology of the films. Contact angle (CA) analyses of the BF films reveals that the surface porosity increases water CAs compared with solvent cast films, and, in the case of hydrophobic polymers, leads to significant increase in the CAs of dodecane. The hydrophobicity of the BF films is further amplified by the removal of the topmost layer which leads in some cases to superhydrophobic surfaces. BF films containing glucose units are hydrophilic exhibiting water CAs below 90°. These glycosylated porous surfaces are shown to bind lectin Con A‐FITC or can be labelled with isothiocyanate marker. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41225.

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Tailored surface properties of semi-fluorinated block copolymers by electrospinning

Cited by 45 publications

References 27 publications

Electrospinning Superhydrophobic Fibers Using Surface Segregating End-Functionalized Polymer Additives

Electrospinning Superhydrophobic Fibers Using Surface Segregating End-Functionalized Polymer Additives

Synthesis and lectin recognition of glycosylated amphiphilic nanoparticles

Breath figure templated semifluorinated block copolymers with tunable surface properties and binding capabilities

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