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Article Dans Une Revue Soft Matter Année : 2018

Surfactant controlled zwitterionic cellulose nanofibril dispersions

Julien Schmitt
Juan Muñoz-Garcia
  • Fonction : Auteur
Valeria Gabrielli
  • Fonction : Auteur
Jesus Angulo
Yaroslav Khimyak
  • Fonction : Auteur

Résumé

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.

Dates et versions

hal-03035967 , version 1 (02-12-2020)

Identifiants

Citer

Vincenzo Calabrese, Marcelo da Silva, Julien Schmitt, Juan Muñoz-Garcia, Valeria Gabrielli, et al.. Surfactant controlled zwitterionic cellulose nanofibril dispersions. Soft Matter, 2018, 14 (38), pp.7793-7800. ⟨10.1039/C8SM00752G⟩. ⟨hal-03035967⟩
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