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dc.contributor.authorGamarra Montes, Ana
dc.contributor.authorMuñoz Guerra, Sebastián
dc.contributor.authorUrpí Garriga, Lourdes
dc.contributor.authorGalbis Fuster, Elsa
dc.contributor.authorGalbis Pérez, Juan Antonio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.identifier.citationGamarra, A. [et al.]. Nanocomposites of microbial polyglutamic acid and nanoclays compatibilized by organophosphonium surfactants. "Macromolecular chemistry and physics", 1 Gener 2018, vol. 219, núm. 12, p. 1800083-1-1800083-10.
dc.description.abstractIonic coupling of bacterial poly(¿-glutamic acid) (PGGA) with alkyltrimethylphosphonium surfactants is reported to render comb-like PGGA complexes with a biphasic-layered structure displaying periodicity at the nanoscopic scale. In this work, nanocomposites made of PGGA and montmorillonite, and covering a wide variety of compositions, are prepared by using either dodecyl- or eicosyl-trimethylphosphonium surfactant as a third component with a double purpose, that is, ionic complexation of PGGA and organo-modification of the nanoclay. Thermogravimetric analysis ascertains the compositions of these three-component nanocomposites and evidences their excellent thermal stability. The nanocomposite structure with PGGA and clay more or less intercalated according to composition and thermal history is evidenced by both X-ray diffraction and transmission electron microscopy. Simultaneous thermal SAXS/WAXS analysis at real time reveals extensive intermixing of the two phases that become notably enhanced by heating treatment. Thermal transition characteristics of the surfactant–PGGA complex are not significantly altered in the nanocomposites, but elastic moduli and strength to yield are found to increase proportionally to the content of clay
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshNanocomposites (Materials)
dc.subject.lcshBiopolymers --Biotechnology
dc.titleNanocomposites of microbial polyglutamic acid and nanoclays compatibilized by organophosphonium surfactants
dc.subject.lemacNanocompòsits (Materials)
dc.subject.lemacBiopolímers -- Biotecnologia
dc.contributor.groupUniversitat Politècnica de Catalunya. POL - Polímers Industrials Avançats i Biopolímers Tecnològics
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorGamarra, A.; Muñoz, S.; Urpí, L.; Galbis, E.; Galbis Pérez, Juan Antonio
local.citation.publicationNameMacromolecular chemistry and physics

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Attribution-NonCommercial-NoDerivs 3.0 Spain
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