Pretreatment-dependent surface chemistry of wood nanocellulose for pH-sensitive hydrogels.
Bottom Line: The pre-treatments yielded a highly nanofibrillated material, with significant amounts of aldehyde and carboxyl groups.This is due to the swelling capacity of the 3D micro-porous structures, which have ionisable functional groups.In this study, we demonstrated that nanocellulose gels have a significantly higher swelling degree in neutral and alkaline conditions, compared to an acid environment (pH 3).
Affiliation: Paper and Fibre Research Institute (PFI) - Høgskoleringen 6b, Trondheim, Norway firstname.lastname@example.org.Show MeSH
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Mentions: The measurement of the water absorption exemplifies the pH-responsive capabilities of the manufactured hydrogels. Considering the CMNC sample, at low pH, the gel has a lower swelling compared to neutral and alkaline pH. The same trend is observed with the cross-linked HMDA–CMPNC hydrogel. However, the swelling of the HMDA–CMPNC is considerably lower, compared to the neat CMNC sample (Figure 7).Figure 7.
Affiliation: Paper and Fibre Research Institute (PFI) - Høgskoleringen 6b, Trondheim, Norway email@example.com.