Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants
Ionic coupling of bacterial poly(γ-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 cove...
| Authors: | ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Accepted version |
| Publication date: | 2018 |
| Country: | España |
| Institution: | Universidad de Sevilla (US) |
| Repository: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:idus.us.es:11441/144284 |
| Online Access: | https://hdl.handle.net/11441/144284 https://doi.org/10.1002/macp.201800083 |
| Access Level: | Open access |
| _version_ | 1878733841516986368 |
|---|---|
| author | Gamarra, Ana |
| author2 | Muñoz Guerra, Sebastián Urpí, Lourdes Galbis Fuster, Elsa Galbis Pérez, Juan Antonio |
| author2_role | author author author author |
| author_browse | Galbis Fuster, Elsa Galbis Pérez, Juan Antonio Gamarra, Ana Muñoz Guerra, Sebastián Urpí, Lourdes |
| author_facet | Gamarra, Ana Muñoz Guerra, Sebastián Urpí, Lourdes Galbis Fuster, Elsa Galbis Pérez, Juan Antonio |
| author_role | author |
| collection | idUS. Depósito de Investigación de la Universidad de Sevilla |
| description | Ionic coupling of bacterial poly(γ-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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_5e0dbf79ff31ef04c008fa366d8890e0 |
| institution | Universidad de Sevilla (US) |
| instname_str | Universidad de Sevilla (US) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:idus.us.es:11441/144284 |
| publishDate | 2018 |
| publishDateSort | 2018 |
| publisher | Wiley |
| publisherStr | Wiley |
| reponame_str | idUS. Depósito de Investigación de la Universidad de Sevilla |
| spelling | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants Gamarra, Ana Muñoz Guerra, Sebastián Urpí, Lourdes Galbis Fuster, Elsa Galbis Pérez, Juan Antonio Ionic coupling of bacterial poly(γ-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. Ministerio de Ciencia, Innovación y Universidades de España (MICINN)-MAT2016-77345-C3-1-P Agencia de Gestión de Ayudas Universitarias y de Investigación de Barcelona-AGAUR 2009SGR1469 Wiley https://hdl.handle.net/11441/144284 https://doi.org/10.1002/macp.201800083 |
| spellingShingle | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants Gamarra, Ana |
| status_str | acceptedVersion |
| title | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants |
| title_full | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants |
| title_fullStr | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants |
| title_full_unstemmed | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants |
| title_short | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants |
| title_sort | Nanocomposites of Microbial Polyglutamic Acid and Nanoclays Compatibilized by Organophosphonium Surfactants |
| url | https://hdl.handle.net/11441/144284 https://doi.org/10.1002/macp.201800083 |