Structural control of polyelectrolyte/microemulsion droplet complexes (PEMECs) with different polyacrylates

Simple item page
dc.contributor.authorSimon, Miriam
dc.contributor.authorKrause, Patrick
dc.contributor.authorChiappisi, Leonardo
dc.contributor.authorNoirez, Laurence
dc.contributor.authorGradzielski, Michael
dc.date.accessioned2020-05-27T09:54:55Z
dc.date.available2020-05-27T09:54:55Z
dc.date.issued2018-10-23
dc.description.abstractThe ionic assembly of oppositely charged polyelectrolyte–surfactant complexes (PESCs) is often done with the aim of constructing more functional colloids, for instance as advanced delivery systems. However, PESCs are often not easily loaded with a solubilisate due to intrinsic restrictions of such complexes. This question was addressed from a different starting point: by employing microemulsion droplets as heavily loaded surfactant systems and thereby avoiding potential solubilisation limitations from the beginning. We investigated mixtures of cationic oil-in-water (O/W) microemulsion droplets and oppositely charged sodium polyacrylate (NaPA) and determined structure and phase behaviour as a function of the mixing ratio for different droplet sizes and different Mw (NaPA). Around an equimolar charge ratio an extended precipitate region is present, which becomes wider for larger droplets and with increasing Mw of the NaPA. Static and dynamic light scattering (SLS and DLS) and small-angle neutron scattering (SANS) show the formation of one-dimensional arrangements of microemulsion droplets for polyelectrolyte excess, which become more elongated with increasing Mw (NaPA) and less so with increasing NaPA excess. What is interesting is a marked sensitivity to ionic strength, where already a modest increase to ∼20 mM leads to a dissolution of the complexes. This work shows that polyelectrolyte/microemulsion complexes (PEMECs) are structurally very versatile hybrid systems, combining the high solubilisate loading of microemulsions with the larger-scale structuring induced by the polymer, thereby markedly extending the concept of conventional PESCs. This type of system has not been described before and is highly promising for future applications where high payloads are to be formulated.en
dc.identifier.eissn2041-6539
dc.identifier.issn2041-6520
dc.identifier.pmid30713642en
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/11230
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-10118
dc.language.isoen
dc.relation.ispartof10.14279/depositonce-10021en
dc.rights.urihttps://creativecommons.org/licenses/by-nc/3.0/
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.otheroil-in-wateren
dc.subject.otherchargeen
dc.subject.otherdropleten
dc.subject.othermicroemulsionen
dc.subject.otherPEMECsen
dc.subject.otherpolyelectrolyteen
dc.titleStructural control of polyelectrolyte/microemulsion droplet complexes (PEMECs) with different polyacrylatesen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c8sc04013c
dcterms.bibliographicCitation.issue2
dcterms.bibliographicCitation.journaltitleChemical Scienceen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistry (RSC)en
dcterms.bibliographicCitation.originalpublisherplaceCambridgeen
dcterms.bibliographicCitation.pageend397
dcterms.bibliographicCitation.pagestart385
dcterms.bibliographicCitation.volume10
tub.accessrights.dnbfree
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Physikalische Chemie / Molekulare Materialwissenschaftende
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Physikalische Chemie / Molekulare Materialwissenschaftende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinde

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
simon_etal_2018.pdf
Size:
1.51 MB
Format:
Adobe Portable Document Format
Download

Collections

Publications