Surfactant controlled zwitterionic cellulose nanofibril dispersions

Vincenzo Calabrese; Marcelo da Silva; Julien Schmitt; Juan Munoz-Garcia; Valeria Gabrielli; Janet L Scott; Jesus Angulo; Yaroslav Z. Khimyak; Karen J Edler

doi:10.1039/C8SM00752G

Surfactant controlled zwitterionic cellulose nanofibril dispersions

Vincenzo Calabrese, Marcelo da Silva, Julien Schmitt, Juan Munoz-Garcia, Valeria Gabrielli, Janet L Scott, Jesus Angulo, Yaroslav Z. Khimyak, Karen J Edler

Research output: Contribution to journal › Article › peer-review

18 Citations (SciVal)

Abstract

Zwitterionic cellulose nanofibrils (ZCNF) with isoelectric point of 3.4 were obtained by grafting glycidyltrimethylammonium chloride onto TEMPO/NaBr/NaOCl-oxidised cellulose nanofibrils. 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. On the contrary, upon addition of the cationic species dodecyltrimethylammonium bromide, the dispersion undergoes charge neutralization, leading to more pronounced flocculation.

Original language	English
Pages (from-to)	7793-7800
Number of pages	8
Journal	Soft Matter
Volume	14
Issue number	38
DOIs	https://doi.org/10.1039/C8SM00752G
Publication status	Published - 1 Aug 2018

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title = "Surfactant controlled zwitterionic cellulose nanofibril dispersions",

abstract = "Zwitterionic cellulose nanofibrils (ZCNF) with isoelectric point of 3.4 were obtained by grafting glycidyltrimethylammonium chloride onto TEMPO/NaBr/NaOCl-oxidised cellulose nanofibrils. 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. On the contrary, upon addition of the cationic species dodecyltrimethylammonium bromide, the dispersion undergoes charge neutralization, leading to more pronounced flocculation.",

author = "Vincenzo Calabrese and {da Silva}, Marcelo and Julien Schmitt and Juan Munoz-Garcia and Valeria Gabrielli and Scott, {Janet L} and Jesus Angulo and Khimyak, {Yaroslav Z.} and Edler, {Karen J}",

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T1 - Surfactant controlled zwitterionic cellulose nanofibril dispersions

AU - Calabrese, Vincenzo

AU - da Silva, Marcelo

AU - Schmitt, Julien

AU - Munoz-Garcia, Juan

AU - Gabrielli, Valeria

AU - Scott, Janet L

AU - Angulo, Jesus

AU - Khimyak, Yaroslav Z.

AU - Edler, Karen J

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Zwitterionic cellulose nanofibrils (ZCNF) with isoelectric point of 3.4 were obtained by grafting glycidyltrimethylammonium chloride onto TEMPO/NaBr/NaOCl-oxidised cellulose nanofibrils. 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. On the contrary, upon addition of the cationic species dodecyltrimethylammonium bromide, the dispersion undergoes charge neutralization, leading to more pronounced flocculation.

AB - Zwitterionic cellulose nanofibrils (ZCNF) with isoelectric point of 3.4 were obtained by grafting glycidyltrimethylammonium chloride onto TEMPO/NaBr/NaOCl-oxidised cellulose nanofibrils. 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. On the contrary, upon addition of the cationic species dodecyltrimethylammonium bromide, the dispersion undergoes charge neutralization, leading to more pronounced flocculation.

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U2 - 10.1039/C8SM00752G

DO - 10.1039/C8SM00752G

M3 - Article

SN - 1744-683X

VL - 14

SP - 7793

EP - 7800

JO - Soft Matter

JF - Soft Matter

IS - 38

ER -

Surfactant controlled zwitterionic cellulose nanofibril dispersions

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Surfactant controlled zwitterionic cellulose nanofibril dispersions

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MC2-Electron Microscopy (EM)

MC2- Nuclear Magnetic Resonance (NMR)

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