Skip to main content

Research Repository

Advanced Search

Interactions between microfibrillar cellulose and carboxymethyl cellulose in an aqueous suspension

Agarwal, Deepa; Macnaughtan, William; Foster, Tim

Interactions between microfibrillar cellulose and carboxymethyl cellulose in an aqueous suspension Thumbnail


Authors

Deepa Agarwal

William Macnaughtan

Tim Foster



Abstract

New microstructures with interesting, unique and stable textures, particularly relevant to food systems were created by redispersing Microfibrillar cellulose (MFC). This paper reports the interactions between microfibrillar cellulose and carboxymethyl cellulose (CMC) in redispersed aqueous suspensions, by using rheological measurements on variable ratios of MFC/CMC and correlating these with apparent water mobility as determined by time domain NMR. MFC is a network of cellulose fibrils produced by subjecting pure cellulose pulp to high-pressure mechanical homogenisation. A charged polymer such as CMC reduces the aggregation of microfibrillar/fibre bundles upon drying. Small amplitude oscillatory rheological analysis showed the viscoelastic gel-like behaviour of suspensions which was independent of the CMC content in the MFC suspension. A viscous synergistic effect was observed when CMC was added to MFC before drying, leading to improved redispersibility of the suspension. Novel measurements of NMR relaxation suggested that the aggregated microfibrillar/fibre bundles normally dominate the relaxation times (T2). The dense microfibrillar network plays an important role in generating stable rheological properties and controlling the mobility of the polymer and hence the apparent mobility of the water in the suspensions.

Citation

Agarwal, D., Macnaughtan, W., & Foster, T. (2018). Interactions between microfibrillar cellulose and carboxymethyl cellulose in an aqueous suspension. Carbohydrate Polymers, 185, https://doi.org/10.1016/j.carbpol.2017.12.086

Journal Article Type Article
Acceptance Date Dec 31, 2017
Online Publication Date Jan 2, 2018
Publication Date Apr 1, 2018
Deposit Date Feb 26, 2018
Publicly Available Date Jan 3, 2019
Journal Carbohydrate Polymers
Print ISSN 0144-8617
Electronic ISSN 1879-1344
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 185
DOI https://doi.org/10.1016/j.carbpol.2017.12.086
Keywords Microfibrillar cellulose ; Carboxymethyl cellulose ; Low-field NMR ; Relaxation time ; Rheology
Public URL https://nottingham-repository.worktribe.com/output/922620
Publisher URL https://www.sciencedirect.com/science/article/pii/S0144861717315035
Contract Date Feb 26, 2018

Files





Downloadable Citations