Tunable Polyacrylonitrile-Based Micellar Aggregates as a Potential Tool for the Fabrication of Carbon Nanofibers

Lazzari, Massimo; Scalarone, Dominique Maria; Hoppe, Cristina Elena; Vázquez–Vázquez, C.; López‐Quintela, M. Arturo

doi:10.1021/cm7019894

Cited by 63 publications

(49 citation statements)

References 33 publications

(21 reference statements)

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“…[63,68,69] At the moment we cannot separate these two factors. Moreover, the DLS instrument used in the present work always gave histograms of the size distribution of the micelles when the CONTIN method was used for data analysis.…”

Section: Effect Of the Pcl Lengthmentioning

confidence: 99%

“…[45,46] This type of micelle can exhibit abundant morphologies, including spheres, cylinders and lamellae. [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] Our results showed that the morphology of the semicrystalline micelles is related to the reduced tethering density of the corona (s), [45] which is defined by spR 2 g (where s is the tethered chain density and is equal to the reciprocal of the covered area of the soluble chains and R g is the radius of gyration of a free soluble block having the same molecular weight at the same conditions). [65,66] Based on the definition, the reduced tethering density is determined by the size of the soluble block and the chain folds of the crystalline block.…”

Section: Introductionmentioning

confidence: 99%

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Inorganic‐Salt‐Induced Morphological Transformation of Semicrystalline Micelles of PCL‐b‐PEO Block Copolymer in Aqueous Solution

et al. 2010

Macro Chemistry & Physics

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The effect of inorganic salt at concentrations typical of a biological environment on the micellar morphology of semicrystalline PCL‐b‐PEO in aqueous solution is investigated. The salt is introduced either by dialysis of a THF solution against an aqueous solution of the salt or by adding it into an aqueous solution containing preformed micelles. The inorganic salt can induce sphere‐to‐rod or sphere‐to‐lamella transformations of the PCL‐b‐PEO micelles in aqueous solution, depending on the length of the PCL block. The inorganic salt induces “salting‐out” of the PEO block, leading to a decrease in the reduced tethering density of the corona in the micelles.

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Section: Effect Of the Pcl Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inorganic‐Salt‐Induced Morphological Transformation of Semicrystalline Micelles of PCL‐b‐PEO Block Copolymer in Aqueous Solution

et al. 2010

Macro Chemistry & Physics

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“…Large-scale segregation should be detectable in TEM images, since the PI block can be stained with OsO 4 . These experiments to date have been disappointing in that they show no clear evidence of block copolymer segregation in the micelles.…”

Section: Micelles Formed From Binary Polymer Blendsmentioning

confidence: 99%

Fiberlike Micelles Formed by Living Epitaxial Growth from Blends of Polyferrocenylsilane Block Copolymers

Cambridge

Guerin

Manners

et al. 2010

Macromol. Rapid Commun.

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Poly(ferrocenyldimethylsilane) (PFS) block copolymers form fiberlike micelles by a seeded growth process. This paper describes the effect of adding similar amounts of PFS block copolymers, PFS-PDMS and PFS-PI, to a common micelle seed. The lengths of the micelles obtained were strongly influenced by the degree of polymerization of the corona-forming blocks. The change in length was due to a change in the number of polymer molecules per unit length of the micelle.

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“…11 The crystallized blocks in these polymers can be composed of poly(ferrocenyl dimethylsilane) (PFDMS), 12 poly(3-hexylthiophene) (P3HT), 13,14 poly(ε-caprolactone) (PCL), 15,16 stereoregular polylactides (srPLA), 17,18 poly(ethylene oxide), 19 polyethylene (PE), 20 and polyacrylonitrile (PAN). 21 Most of these types of block polymers can only form one-dimensional cylindrical or wormlike crystalline-core micelles through the living CDSA method.…”

Section: Introductionmentioning

confidence: 99%

Size-Tunable Nanosheets by the Crystallization-Driven 2D Self-Assembly of Hyperbranched Poly(ether amine) (hPEA)

Jiang

Yin

2014

Macromolecules

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We reported the preparation of uniform square nanosheets with tunable size by the living crystallization-driven 2D self-assembly of hyperbranched poly(ether amine) capped with heptaisobutyl polyhedral oligomeric silsesquioxane (POSS). The nanosheets of HP1 containing both anthracene (AN) and POSS moieties in a solution of 1,4-dioxane and water can be fragmented after the melting of the POSS moieties upon heating and can be regenerated after the recrystallization of POSS moieties, which was confirmed by microdifferential scanning calorimetry (μDSC) and dynamic light scattering (DLS) studies and transmission electron microscopy (TEM) images. The obtained fragmented nanosheets (HP1-NSs) with a relatively small size were used as seeds for the 2D epitaxial living growth of HP1 unimers to fabricate uniform square nanosheets with tunable edge lengths from ∼0.5 to ∼4.5 μm, which is dependent on the unimer-to-seed ratio. Furthermore, dual-component nanosheets can also be obtained by random cocrystallization of HP1 with another type of hPEA capped with POSS and ferrocene (HP2). This crystallization-driven 2D self-assembly behavior of POSS-capped hPEA might provide potential significance in the preparation of functional nanosheets with different sizes and components, which could be further used as templates for inorganic nanosheets and 2D-platforms for metal nanoparticles.

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Tunable Polyacrylonitrile-Based Micellar Aggregates as a Potential Tool for the Fabrication of Carbon Nanofibers

Cited by 63 publications

References 33 publications

Inorganic‐Salt‐Induced Morphological Transformation of Semicrystalline Micelles of PCL‐b‐PEO Block Copolymer in Aqueous Solution

Inorganic‐Salt‐Induced Morphological Transformation of Semicrystalline Micelles of PCL‐b‐PEO Block Copolymer in Aqueous Solution

Fiberlike Micelles Formed by Living Epitaxial Growth from Blends of Polyferrocenylsilane Block Copolymers

Size-Tunable Nanosheets by the Crystallization-Driven 2D Self-Assembly of Hyperbranched Poly(ether amine) (hPEA)

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