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Cellulose–solvent interactions from self-diffusion NMR

Gentile, Luigi LU and Olsson, Ulf LU (2016) In Cellulose 23(4). p.2753-2758
Abstract

Molecular self-diffusion coefficients were measured in solutions of microcrystalline cellulose (MCC) and dissolving pulp, in 40 wt% aqueous tetrabutylammonium hydroxide (TBAH), using pulsed field gradient stimulated echo NMR. From the cellulose diffusion coefficients, a weight averaged radius of hydration h>w = 6.1 nm for MCC and h>w = 15 nm for pulp were obtained. Water and TBA+ ions show a significantly different dependence on the cellulose concentration, revealing different molecular interactions with the polymer. Water-cellulose are essentially excluded volume. TBA+ ions, on the other hand, bind to cellulose with approximately 1.2 TBA+ ions per glucose unit.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cellulose, NMR, Polymer–solvent interaction, Self-diffusion, Tetrabutylammonium hydroxide
in
Cellulose
volume
23
issue
4
pages
6 pages
publisher
Springer
external identifiers
  • Scopus:84974849225
ISSN
0969-0239
DOI
10.1007/s10570-016-0984-0
language
English
LU publication?
yes
id
72fb46c3-307d-41d5-8c87-a456a275a4ec
date added to LUP
2016-07-08 12:07:29
date last changed
2016-12-09 13:48:44
@misc{72fb46c3-307d-41d5-8c87-a456a275a4ec,
  abstract     = {<p>Molecular self-diffusion coefficients were measured in solutions of microcrystalline cellulose (MCC) and dissolving pulp, in 40 wt% aqueous tetrabutylammonium hydroxide (TBAH), using pulsed field gradient stimulated echo NMR. From the cellulose diffusion coefficients, a weight averaged radius of hydration h&gt;<sub>w</sub> = 6.1 nm for MCC and h&gt;<sub>w</sub> = 15 nm for pulp were obtained. Water and TBA<sup>+</sup> ions show a significantly different dependence on the cellulose concentration, revealing different molecular interactions with the polymer. Water-cellulose are essentially excluded volume. TBA<sup>+</sup> ions, on the other hand, bind to cellulose with approximately 1.2 TBA<sup>+</sup> ions per glucose unit.</p>},
  author       = {Gentile, Luigi and Olsson, Ulf},
  issn         = {0969-0239},
  keyword      = {Cellulose,NMR,Polymer–solvent interaction,Self-diffusion,Tetrabutylammonium hydroxide},
  language     = {eng},
  number       = {4},
  pages        = {2753--2758},
  publisher    = {ARRAY(0xc27d430)},
  series       = {Cellulose},
  title        = {Cellulose–solvent interactions from self-diffusion NMR},
  url          = {http://dx.doi.org/10.1007/s10570-016-0984-0},
  volume       = {23},
  year         = {2016},
}