Limits...
Pretreatment-dependent surface chemistry of wood nanocellulose for pH-sensitive hydrogels.

Chinga-Carrasco G, Syverud K - J Biomater Appl (2014)

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).

View Article: PubMed Central - PubMed

Affiliation: Paper and Fibre Research Institute (PFI) - Høgskoleringen 6b, Trondheim, Norway gary.chinga.carrasco@pfi.no.

Show MeSH

Related in: MedlinePlus

Water absorption as a function of pH. The CMPNC sample was cross-linked with hexamethylenediamine (HMDA). The results are given with ±1 STD.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2 - License 3
getmorefigures.php?uid=PMC4231171&req=5

fig7-0885328214531511: Water absorption as a function of pH. The CMPNC sample was cross-linked with hexamethylenediamine (HMDA). The results are given with ±1 STD.

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.


Pretreatment-dependent surface chemistry of wood nanocellulose for pH-sensitive hydrogels.

Chinga-Carrasco G, Syverud K - J Biomater Appl (2014)

Water absorption as a function of pH. The CMPNC sample was cross-linked with hexamethylenediamine (HMDA). The results are given with ±1 STD.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2 - License 3
Show All Figures
getmorefigures.php?uid=PMC4231171&req=5

fig7-0885328214531511: Water absorption as a function of pH. The CMPNC sample was cross-linked with hexamethylenediamine (HMDA). The results are given with ±1 STD.
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.

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).

View Article: PubMed Central - PubMed

Affiliation: Paper and Fibre Research Institute (PFI) - Høgskoleringen 6b, Trondheim, Norway gary.chinga.carrasco@pfi.no.

Show MeSH
Related in: MedlinePlus