Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Impact of wormlike micelles on nano and macroscopic structure of TEMPO-oxidized cellulose nanofibril hydrogels

da Silva, Marcelo A. ; Calabrese, Vincenzo ; Schmitt, Julien LU ; Hossain, Kazi M. Zakir ; Bryant, Saffron J. ; Mahmoudi, Najet LU ; Scott, Janet L. and Edler, Karen J. LU orcid (2020) In Soft Matter 16(20). p.4887-4896
Abstract

In this work, we investigated the effect of adding surfactant mixtures on the rheological properties of TEMPO-oxidized cellulose nanofibril (OCNF) saline dispersions. Three surfactant mixtures were studied: cocamidopropyl betaine (CAPB)/sodium dodecyl sulfate (SDS), which forms wormlike micelles (WLMs); cocamidopropylamine oxide (CAPOx)/SDS, which forms long rods; and CAPB/sodium lauroyl sarcosinate (SLS), which forms spherical micelles. The presence of micelles in these surfactant mixtures, independent of their morphology, leads to an increase of tan δ, making the gels less solid-like, therefore acting as a plasticizer. WLMs were able to suppress strain stiffening normally observed in OCNF gels at large strains. OCNF/WLM gels have... (More)

In this work, we investigated the effect of adding surfactant mixtures on the rheological properties of TEMPO-oxidized cellulose nanofibril (OCNF) saline dispersions. Three surfactant mixtures were studied: cocamidopropyl betaine (CAPB)/sodium dodecyl sulfate (SDS), which forms wormlike micelles (WLMs); cocamidopropylamine oxide (CAPOx)/SDS, which forms long rods; and CAPB/sodium lauroyl sarcosinate (SLS), which forms spherical micelles. The presence of micelles in these surfactant mixtures, independent of their morphology, leads to an increase of tan δ, making the gels less solid-like, therefore acting as a plasticizer. WLMs were able to suppress strain stiffening normally observed in OCNF gels at large strains. OCNF/WLM gels have lowerG′ values than OCNF gels while the other micellar morphologies have a reduced impact onG′. The presence of unconnected micelles leads to increased dissipative deformation in OCNF gels without affecting the connectivity of the fibrils, while the presence of entangled micelles interferes with the OCNF network.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
in
Soft Matter
volume
16
issue
20
pages
10 pages
publisher
Royal Society of Chemistry
external identifiers
  • pmid:32424387
  • scopus:85085585949
ISSN
1744-683X
DOI
10.1039/d0sm00135j
language
English
LU publication?
no
additional info
Publisher Copyright: © The Royal Society of Chemistry 2020.
id
7fdd64cc-061c-43ec-8e83-318ae33eea8f
date added to LUP
2023-01-18 09:00:07
date last changed
2024-03-06 09:25:07
@article{7fdd64cc-061c-43ec-8e83-318ae33eea8f,
  abstract     = {{<p>In this work, we investigated the effect of adding surfactant mixtures on the rheological properties of TEMPO-oxidized cellulose nanofibril (OCNF) saline dispersions. Three surfactant mixtures were studied: cocamidopropyl betaine (CAPB)/sodium dodecyl sulfate (SDS), which forms wormlike micelles (WLMs); cocamidopropylamine oxide (CAPOx)/SDS, which forms long rods; and CAPB/sodium lauroyl sarcosinate (SLS), which forms spherical micelles. The presence of micelles in these surfactant mixtures, independent of their morphology, leads to an increase of tan δ, making the gels less solid-like, therefore acting as a plasticizer. WLMs were able to suppress strain stiffening normally observed in OCNF gels at large strains. OCNF/WLM gels have lowerG′ values than OCNF gels while the other micellar morphologies have a reduced impact onG′. The presence of unconnected micelles leads to increased dissipative deformation in OCNF gels without affecting the connectivity of the fibrils, while the presence of entangled micelles interferes with the OCNF network.</p>}},
  author       = {{da Silva, Marcelo A. and Calabrese, Vincenzo and Schmitt, Julien and Hossain, Kazi M. Zakir and Bryant, Saffron J. and Mahmoudi, Najet and Scott, Janet L. and Edler, Karen J.}},
  issn         = {{1744-683X}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{20}},
  pages        = {{4887--4896}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Soft Matter}},
  title        = {{Impact of wormlike micelles on nano and macroscopic structure of TEMPO-oxidized cellulose nanofibril hydrogels}},
  url          = {{http://dx.doi.org/10.1039/d0sm00135j}},
  doi          = {{10.1039/d0sm00135j}},
  volume       = {{16}},
  year         = {{2020}},
}