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Surfactant controlled zwitterionic cellulose nanofibril dispersions

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Abstract

Zwitterionic cellulose nanofibrils (ZCNFs) with an isoelectric point of 3.4 were obtained by grafting glycidyltrimethylammonium chloride onto TEMPO/NaBr/NaOCl-oxidised cellulose nanofibrils. The ZCNF aqueous dispersions were characterized via transmission electron microscopy, rheology and small angle neutron scattering, revealing a fibril-bundle structure with pronounced aggregation at pH 7. Surfactants were successfully employed to tune the stability of the ZCNF dispersions. Upon addition of the anionic surfactant, sodium dodecyl sulfate, the ZCNF dispersion shows individualized fibrils due to electrostatic stabilization. In contrast, upon addition of the cationic species dodecyltrimethylammonium bromide, the dispersion undergoes charge neutralization, leading to more pronounced flocculation.

Graphical abstract: Surfactant controlled zwitterionic cellulose nanofibril dispersions

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Publication details

The article was received on 11 Apr 2018, accepted on 30 Jul 2018 and first published on 01 Aug 2018


Article type: Paper
DOI: 10.1039/C8SM00752G
Citation: Soft Matter, 2018, Advance Article
  • Open access: Creative Commons BY license
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    Surfactant controlled zwitterionic cellulose nanofibril dispersions

    V. Calabrese, M. A. da Silva, J. Schmitt, J. C. Muñoz-Garcia, V. Gabrielli, J. L. Scott, J. Angulo, Y. Z. Khimyak and K. J. Edler, Soft Matter, 2018, Advance Article , DOI: 10.1039/C8SM00752G

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