Elucidating the interactions between cellulose and hemicelluloses is of fundamental importance for understanding the molecular architecture of plant cell walls. Adsorption of xyloglucan (XG) onto regenerated cellulose (RC), sulfated cellulose nanocrystal (SNC), and desulfated cellulose nanocrystal (DNC) films was studied by quartz crystal microbalance with dissipation monitoring (QCM-D), surface plasmon resonance (SPR), and atomic force microscopy (AFM). The amount of adsorbed XG increased in the order RC < SNC < DNC. XG adsorption onto RC films was independent of film thickness (d), whereas XG adsorption was weakly dependent on d for SNC films and strongly dependent on d for DNC films. However, 'monolayer-thin' films of RC, SNC, and DNC adsorbed approximately the same amount of XG. These results suggest that morphology and surface charge of the cellulose substrate play a limited role in XG adsorption and that accessible surface area of the cellulose film may be the factor leading to apparent differences in XG adsorption for different surfaces.

Cellulose morphology and surface charge effects on xyloglucan adsorption

243rd National Meeting (2012)

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