A quantitative cryoTEM study on crosslinked nanocapsule morphology in RAFT-based vesicle polymerization

Mohammad Amin Moradi, Paul H.H. Bomans, Alexander W. Jackson, Alex M. van Herk, Johan P.A. Heuts

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Uittreksel

The effect of crosslinking on the morphology of nanocapsules synthesized by vesicle-templated reversible addition-fragmentation chain transfer (RAFT) polymerization was investigated and it was found that although crosslinking increases the fraction of protruded capsules, it is not the origin of the protrusions. Starved-feed emulsion polymerization of methyl methacrylate and tert-butyl acrylate with varying amounts of a range of crosslinkers using a seed of cationic vesicles covered by anionic co-oligomers containing a RAFT functional group, results in several different structures, with true spherical capsules and protruded capsules being the main products under the used reaction conditions. Quantitative cryoTEM studies allowed the counting of the different morphologies and it was found that the final fraction of protruded structures strongly depended on the used crosslinker. In the case of using 10 mol% of ethylene glycol dimethacrylate, ∼90% of the observed structures were protruded capsules, whereas this was only ∼4% in the case of 10 mol% ethylene glycol diacrylate. Finally, tomography showed that the protrusions are an integral part of the polymer shell.

TaalEngels
Pagina's329-336
Aantal pagina's8
TijdschriftEuropean Polymer Journal
Volume108
DOI's
StatusGepubliceerd - 1 nov 2018

Vingerafdruk

Nanocapsules
capsules
Ethylene glycol
Crosslinking
Capsules
fragmentation
polymerization
Polymerization
Emulsion polymerization
crosslinking
Oligomers
Functional groups
Tomography
Seed
glycols
ethylene
Ethylene Glycol
Methacrylates
Polymers
acrylates

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    Citeer dit

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    title = "A quantitative cryoTEM study on crosslinked nanocapsule morphology in RAFT-based vesicle polymerization",
    abstract = "The effect of crosslinking on the morphology of nanocapsules synthesized by vesicle-templated reversible addition-fragmentation chain transfer (RAFT) polymerization was investigated and it was found that although crosslinking increases the fraction of protruded capsules, it is not the origin of the protrusions. Starved-feed emulsion polymerization of methyl methacrylate and tert-butyl acrylate with varying amounts of a range of crosslinkers using a seed of cationic vesicles covered by anionic co-oligomers containing a RAFT functional group, results in several different structures, with true spherical capsules and protruded capsules being the main products under the used reaction conditions. Quantitative cryoTEM studies allowed the counting of the different morphologies and it was found that the final fraction of protruded structures strongly depended on the used crosslinker. In the case of using 10 mol{\%} of ethylene glycol dimethacrylate, ∼90{\%} of the observed structures were protruded capsules, whereas this was only ∼4{\%} in the case of 10 mol{\%} ethylene glycol diacrylate. Finally, tomography showed that the protrusions are an integral part of the polymer shell.",
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    A quantitative cryoTEM study on crosslinked nanocapsule morphology in RAFT-based vesicle polymerization. / Moradi, Mohammad Amin; Bomans, Paul H.H.; Jackson, Alexander W.; van Herk, Alex M.; Heuts, Johan P.A.

    In: European Polymer Journal, Vol. 108, 01.11.2018, blz. 329-336.

    Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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    AU - Bomans,Paul H.H.

    AU - Jackson,Alexander W.

    AU - van Herk,Alex M.

    AU - Heuts,Johan P.A.

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    AB - The effect of crosslinking on the morphology of nanocapsules synthesized by vesicle-templated reversible addition-fragmentation chain transfer (RAFT) polymerization was investigated and it was found that although crosslinking increases the fraction of protruded capsules, it is not the origin of the protrusions. Starved-feed emulsion polymerization of methyl methacrylate and tert-butyl acrylate with varying amounts of a range of crosslinkers using a seed of cationic vesicles covered by anionic co-oligomers containing a RAFT functional group, results in several different structures, with true spherical capsules and protruded capsules being the main products under the used reaction conditions. Quantitative cryoTEM studies allowed the counting of the different morphologies and it was found that the final fraction of protruded structures strongly depended on the used crosslinker. In the case of using 10 mol% of ethylene glycol dimethacrylate, ∼90% of the observed structures were protruded capsules, whereas this was only ∼4% in the case of 10 mol% ethylene glycol diacrylate. Finally, tomography showed that the protrusions are an integral part of the polymer shell.

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