Show simple item record

dc.contributor.authorWang, Hao-Fei
dc.contributor.authorWibowo, David
dc.contributor.authorShao, Zhengzhong
dc.contributor.authorMiddelberg, Anton PJ
dc.contributor.authorZhao, Chun-Xia
dc.date.accessioned2018-03-12T03:49:20Z
dc.date.available2018-03-12T03:49:20Z
dc.date.issued2017
dc.identifier.issn0743-7463
dc.identifier.doi10.1021/acs.langmuir.7b01382
dc.identifier.urihttp://hdl.handle.net/10072/370790
dc.description.abstractDesigned peptide surfactants offer a number of advanced properties over conventional petrochemical surfactants, including biocompatibility, sustainability, and tailorability of the chemical and physical properties through peptide design. Their biocompatibility and degradability make them attractive for various applications, particularly for food and pharmaceutical applications. In this work, two new peptide surfactants derived from an amphiphilic peptide surfactant (AM1) were designed (AM-S and C8-AM) to better understand links between structure, interfacial activity, and emulsification. Based on AM1, which has an interfacial α-helical structure, AM-S and C8-AM were designed to have two modules, that is, the α-helical AM1 module and an additional hydrophobic moiety to provide for better anchoring at the oil–water interface. Both AM-S and C8-AM at low bulk concentration of 20 μM were able to adsorb rapidly at the oil–water interface and reduced interfacial tension to equilibrium values of 17.0 and 8.4 mN/m within 400 s, respectively. Their relatively quick adsorption kinetics allowed the formation of nanoemulsions with smaller droplet sizes and narrower size distribution. AM-S and C8-AM at 800 μM bulk concentration could make nanoemulsions of average diameters 180 and 147 nm, respectively, by simple sonication. With respect to the long-term stability, a minimum peptide concentration of 400 μM for AM-S and a lower concentration of 100 μM for C8-AM were demonstrated to effectively stabilize nanoemulsions over 3 weeks. Compared to AM1, the AM-S nanoemulsion retained its stimuli-responsive function triggered by metal ions, whereas the C8-AM nanoemulsions did not respond to the stimuli as efficiently as AM-S because of the strong anchoring ability of the hydrophobic C8 module. The two-module design of AM-S and C8-AM represents a new strategy in tuning the surface activity of peptide surfactants, offering useful information and guidance of future designs.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.relation.ispartofpagefrom7957
dc.relation.ispartofpageto7967
dc.relation.ispartofissue32
dc.relation.ispartofjournalLangmuir
dc.relation.ispartofvolume33
dc.subject.fieldofresearchNanochemistry
dc.subject.fieldofresearchSupramolecular chemistry
dc.subject.fieldofresearchcode340303
dc.subject.fieldofresearchcode340308
dc.titleDesign of modular peptide surfactants and their surface activity
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyrighthis document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright 2017 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/acs.langmuir.7b01382.
gro.hasfulltextFull Text
gro.griffith.authorWibowo, David


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record