Nanorod engineering by reinforcing hexagonally self-assembled PS–b–P4VP(DDP) with PPE

Zoelen, Wendy van; Ekenstein, Gert Alberda van; Polushkin, Evgeny; Ikkala, Olli; Brinke, G. ten

doi:10.1039/b508120c

Cited by 15 publications

(30 citation statements)

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“…transition metal oxide tubes. 20,[22][23] Blends of block copolymers with homopolymers that have a specific exothermic interaction with one of the blocks of the block copolymers have been investigated in the past by different groups. [24][25][26][27][28] In several studies polystyrene-based block copolymers were combined with PPE.…”

Section: Introductionmentioning

confidence: 99%

“…18,19 Recently, it was demonstrated that nanorods with a PS core and a P4VP corona, obtained via the comb-shaped supramolecules route, exhibit very poor mechanical properties. 20 The rods consisted of nearly symmetric PS-b-P4VP diblock copolymers with a molar mass of ca. 20 000 g/mol for each block, and the poor mechanical properties were attributed to the absence of entanglements.…”

Section: Introductionmentioning

confidence: 99%

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Incorporation of PPE in Lamellar Self-Assembled PS-b-P4VP(PDP) Supramolecules and PS-b-P4VP Diblock Copolymers

et al. 2006

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Self-assembled blends of PS-b-P4VP(PDP) supramolecules, obtained by hydrogen bonding of pentadecylphenol (PDP) side chains to poly(4-vinylpyridine), and poly(2,6-dimethyl-1,4-diphenyl oxide) (PPE) were investigated by thermal analysis and small-angle X-ray scattering (SAXS) and compared with blends of PS-b-P4VP and PPE. Differential scanning calorimetry (DSC) measurements showed a single composition dependent T g of the PPE/PS layers for both systems, demonstrating that PPE is distributed throughout the PS layers. Furthermore, DSC showed that for the PPE/PS-b-P4VP(PDP) blends the presence of PDP is not restricted to the P4VP layers. Its partial presence in the PS-containing domains was confirmed by nuclear magnetic resonance (NMR) spectroscopy on PS-P4VP core-corona nanorods prepared from hexagonally self-assembled PS-b-P4VP-(PDP) supramolecules. The results of the SAXS study on the dependence of the lamellar period of PPE/PS-b-P4VP blends on the amount of PPE were in excellent agreement with a theoretical model based on the Alexander-De Gennes approximation assuming a uniform distribution of PPE throughout the PS layers. For PPE/PS-b-P4VP(PDP) blends the dependence of the long period on the amount of PPE turned out to be somewhat stronger, which may be related to the supramolecular comb-shaped nature of the P4VP(PDP) blocks.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Incorporation of PPE in Lamellar Self-Assembled PS-b-P4VP(PDP) Supramolecules and PS-b-P4VP Diblock Copolymers

et al. 2006

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“…PPE has a high glass transition temperature (T g ¼ 216 C) and due to the molecular level miscibility with PS, its blending increases the glass transition temperature of the core material. Even more importantly, PPE promotes entanglements, and therefore addition of minor fractions of PPE leads to reinforcement, as discussed by van Zoelen et al 18 In order to facilitate simple cleaving, the matrix phase is selected to be poly(4-vinylpyridine) (P4VP) as complexed with alkylphenol: It is well documented based on FTIR that phenols form hydrogen bonds with pyridines, see e.g. ref 51.…”

Section: Resultsmentioning

confidence: 99%

“…weight fraction 23% vs PS) one obtains cylindrical self-assemblies. 17,18,52 In order to have overall alignment, shear flow processing by either large amplitude dynamic rheometry or, more practically, by an extruder allows high overall alignment. 17,19 Finally, the nanofibers forming the self-assembled cylindrical cores can be cleaved by selective polar solvent treatment using ethanol, thus releasing long individualized nanofibers with a PS core and a P4VP corona, see Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1: Schematics for a diblock copolymer self-assembled template consisting polystyrene-b-poly(4-vinylpyridine) where the polystyrene phase is reinforced with poly(2,6-dimethyl-1,4-phenylene oxide) and poly(4-vinylpyridine) is plasticized using dodecylphenol. 18 Atomic layer deposition allows conformal inorganic coatings where the polymer template can even be removed by heat treatment at the end. 21 2: Cleaving native cellulose nanofibers from plant cell wall material.…”

Section: Resultsmentioning

confidence: 99%

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Solid state nanofibers based on self-assemblies: from cleaving from self-assemblies to multilevel hierarchical constructs

et al. 2009

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Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Ikkala, O., Ras, R. H. A., Houbenov, N., Ruokolainen, J., Paakko, M., Laine, J., ... Lindström, T. (2009). Solid state nanofibers based on self-assemblies: from cleaving from self-assemblies to multilevel hierarchical constructs. Faraday Discussions, 143, 95-107. DOI: 10.1039/b905204f Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Self-assemblies and their hierarchies are useful to construct soft materials with structures at different length scales and to tune the materials properties for various functions. Here we address routes for solid nanofibers based on different forms of self-assemblies. On the other hand, we discuss rational ''bottom-up'' routes for multi-level hierarchical self-assembled constructs, with the aim of learning more about design principles for competing interactions and packing frustrations. Here we use the triblock copolypeptide poly(L-lysine)-b-poly(gbenzyl-L-glutamate)-b-poly(L-lysine) complexed with 2 0 -deoxyguanosine 5 0 -monophosphate. Supramolecular disks (G-quartets) stabilized by metal cations are formed and their columnar assembly leads to a packing frustration with the cylindrical packing of helical poly(g-benzyl-L-glutamate), which we suggest is important in controlling the lateral dimensions of the nanofibers. We foresee routes for functionalities by selecting different metal cations within the G-quartets. On the other hand, we discuss nanofibers that are cleaved from bulk self-assemblies in a ''top-down'' manner. After a short introduction based on cleaving nanofibers from diblock copolymeric self-assemblies, we focus on native cellulose nanofibers, as cleaved from plant cell wall fibers, which are expected to have feasible mechanical properties and to be templates for functional nanomaterials. Long nanofibers with 5-20 nm lateral dimensions can be cleaved within an aqueous medium to allow hydrogels and water can be removed to allow highly porous, lightweight, and flexible aerogels. We further describe inorganic/

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Transport and Electro‐Optical Properties in Polymeric Self‐Assembled Systems

Ikkala¹,

Brinke²

2007

Macromolecular Engineering

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Nanorod engineering by reinforcing hexagonally self-assembled PS–b–P4VP(DDP) with PPE

Abstract: Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Cited by 15 publications

References 16 publications

Incorporation of PPE in Lamellar Self-Assembled PS-b-P4VP(PDP) Supramolecules and PS-b-P4VP Diblock Copolymers

Incorporation of PPE in Lamellar Self-Assembled PS-b-P4VP(PDP) Supramolecules and PS-b-P4VP Diblock Copolymers

Solid state nanofibers based on self-assemblies: from cleaving from self-assemblies to multilevel hierarchical constructs

Transport and Electro‐Optical Properties in Polymeric Self‐Assembled Systems

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