Advanced

Impact of lignin content on the properties of hemicellulose hydrogels

Al-Rudainy, Basel LU ; Galbe, Mats LU ; Arcos Hernandez, Monica LU ; Jannasch, Patric LU and Wallberg, Ola LU (2018) In Polymers 11(1).
Abstract
Hemicellulose is a promising renewable raw material for the production of hydrogels. This polysaccharide exists in large amounts in various waste streams, in which they are usually impure and heavily diluted. Several downstream processing methods can be combined to concentrate and purify the hemicellulose. However, such an approach can be costly; hence, the effect of impurities on the formation and properties of hydrogels must be determined. Lignin usually exists in these waste streams as a major impurity that is also difficult to separate. This compound can darken hydrogels and decrease their swellability and reactivity, as shown in many studies. Other properties and effects of lignin impurities are equally important for the end... (More)
Hemicellulose is a promising renewable raw material for the production of hydrogels. This polysaccharide exists in large amounts in various waste streams, in which they are usually impure and heavily diluted. Several downstream processing methods can be combined to concentrate and purify the hemicellulose. However, such an approach can be costly; hence, the effect of impurities on the formation and properties of hydrogels must be determined. Lignin usually exists in these waste streams as a major impurity that is also difficult to separate. This compound can darken hydrogels and decrease their swellability and reactivity, as shown in many studies. Other properties and effects of lignin impurities are equally important for the end application of hydrogels and the overall process economy. In this work, we examined the feasibility of producing hydrogels from hemicelluloses that originated from sodium-based spent sulfite liquor. A combination of membrane filtration and anti-solvent precipitation was used to extract and purify various components. The influence of the purity of hemicellulose and the addition of lignosulfonates (emulated impurities in the downstream processing) to the crosslinking reaction mixture on the mechanical, thermal, and chemical properties of hydrogels was determined. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
galactoglucomannan; lignin; lignin-carbohydrate complex; ultrafiltration; precipitation; hydrogel
in
Polymers
volume
11
issue
1
publisher
MDPI AG
DOI
10.3390/polym11010035
language
English
LU publication?
yes
id
7dbd5dd6-7dfb-4fcb-badf-cb8d26855b5b
date added to LUP
2018-12-27 11:07:44
date last changed
2018-12-31 14:11:33
@article{7dbd5dd6-7dfb-4fcb-badf-cb8d26855b5b,
  abstract     = {Hemicellulose is a promising renewable raw material for the production of hydrogels. This polysaccharide exists in large amounts in various waste streams, in which they are usually impure and heavily diluted. Several downstream processing methods can be combined to concentrate and purify the hemicellulose. However, such an approach can be costly; hence, the effect of impurities on the formation and properties of hydrogels must be determined. Lignin usually exists in these waste streams as a major impurity that is also difficult to separate. This compound can darken hydrogels and decrease their swellability and reactivity, as shown in many studies. Other properties and effects of lignin impurities are equally important for the end application of hydrogels and the overall process economy. In this work, we examined the feasibility of producing hydrogels from hemicelluloses that originated from sodium-based spent sulfite liquor. A combination of membrane filtration and anti-solvent precipitation was used to extract and purify various components. The influence of the purity of hemicellulose and the addition of lignosulfonates (emulated impurities in the downstream processing) to the crosslinking reaction mixture on the mechanical, thermal, and chemical properties of hydrogels was determined.},
  articleno    = {35},
  author       = {Al-Rudainy, Basel and Galbe, Mats and Arcos Hernandez, Monica and Jannasch, Patric and Wallberg, Ola},
  keyword      = {galactoglucomannan; lignin; lignin-carbohydrate complex; ultrafiltration; precipitation; hydrogel},
  language     = {eng},
  number       = {1},
  publisher    = {MDPI AG},
  series       = {Polymers},
  title        = {Impact of lignin content on the properties of hemicellulose hydrogels},
  url          = {http://dx.doi.org/10.3390/polym11010035},
  volume       = {11},
  year         = {2018},
}