title: Unrefined wood hydrolysates are viable reactants for the reproducible synthesis of highly swellable hydrogels.
abstract: A value-adding robust and sequential synthetic pathway was elaborated to produce hydrogel structures with ionic character from crude acetylated galactoglucomannan-rich wood hydrolysate (WH). The WH was first-step liquor originating from a sulphite cracking pulp process for dissolving pulp. The synthetically modified WH fractions were verified at each step by NMR and FTIR, and the hydrogels were characterized with respect to their swelling and mechanical properties. Altering the crosslinking chemistry and the content of ionic moieties resulted in hydrogels with various swelling ratios and mechanical properties. Renewable hydrogel formulations with swelling ratios as high as Qeq=270 were achieved.
authors.affiliation: Fiber and Polymer Technology, Royal Institute of Technology (KTH), Teknikringen 56, SE-100 44 Stockholm, Sweden.
authors.forename: Laleh
authors.initials: L
authors.lastname: Maleki
authors.affiliation: Fiber and Polymer Technology, Royal Institute of Technology (KTH), Teknikringen 56, SE-100 44 Stockholm, Sweden.
authors.forename: Ulrica
authors.initials: U
authors.lastname: Edlund
authors.affiliation: Fiber and Polymer Technology, Royal Institute of Technology (KTH), Teknikringen 56, SE-100 44 Stockholm, Sweden. Electronic address: aila@kth.se.
authors.forename: Ann-Christine
authors.initials: AC
authors.lastname: Albertsson
keywords: Biomass; Hemicellulose; Hydrogel; Renewable; Swelling; Wood hydrolysate