Bacterial cellulose vs. bacterial cellulose nanocrystals as stabilizer agents for O/W pickering emulsions

Sommer, Agata; Staroszczyk, Hanna

doi:10.1016/j.foodhyd.2023.109080

Cited by 10 publications

(1 citation statement)

References 59 publications

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“…Cellulose nanocrystals (CNCs) are particles with a highly anisometric shape that belong to a class of nanomaterials obtained through the controlled acid hydrolysis of naturally occurring cellulose. The CNCs can be obtained from a wide variety of cellulose sources, such as wood [ 1 , 2 , 3 , 4 ], algae [ 5 , 6 ], cotton [ 7 , 8 ], tunicates [ 9 , 10 ], bacterial cellulose [ 11 , 12 ], and plant waste biomass [ 13 ]. The CNCs can possess various functional groups on their surface.…”

Section: Introductionmentioning

confidence: 99%

Dimensions of Cellulose Nanocrystals from Cotton and Bacterial Cellulose: Comparison of Microscopy and Scattering Techniques

Grachev,

Deschaume,

Lang

et al. 2024

Nanomaterials

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Different microscopy and scattering methods used in the literature to determine the dimensions of cellulose nanocrystals derived from cotton and bacterial cellulose were compared to investigate potential bias and discrepancies. Atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), depolarized dynamic light scattering (DDLS), and static light scattering (SLS) were compared. The lengths, widths, and heights of the particles and their respective distributions were determined by AFM. In agreement with previous work, the CNCs were found to have a ribbon-like shape, regardless of the source of cellulose or the surface functional groups. Tip broadening and agglomeration of the particles during deposition cause AFM-derived lateral dimensions to be systematically larger those obtained from SAXS measurements. The radius of gyration determined by SLS showed a good correlation with the dimensions obtained by AFM. The hydrodynamic lateral dimensions determined by DDLS were found to have the same magnitude as either the width or height obtained from the other techniques; however, the precision of DDLS was limited due to the mismatch between the cylindrical model and the actual shape of the CNCs, and to constraints in the fitting procedure. Therefore, the combination of AFM and SAXS, or microscopy and small-angle scattering, is recommended for the most accurate determination of CNC dimensions.

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