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oai:figshare.com:article/34001605 2026-09-26T00:05:12Z category_1 category_915 category_15 category_16 category_21 category_24 category_61 category_122 portal_63 item_type_2 month_year_09_2026

Multiscale Rheo-Optical and Scattering Signatures of Deformation-Induced Anisotropy in Aqueous Cellulose Nanocrystal Suspensions under Large-Amplitude Oscillatory Shear Yoshifumi Yamagata (16726934) Ainaa Amirah Marzuki (25112500) Saki Otobe (20488222) Moe Araida (22447397) Taisuke Sato (1976755) Biophysics Physical Sciences not elsewhere classified Neuroscience Physiology Biotechnology Evolutionary Biology Developmental Biology Mental Health shaped lobe geometry laos ), nonphase imposed laos conditions charged cellulose nanocrystal dependent viscosity growth comparative multiscale map angle light scattering directional mesoscopic anisotropy shaped sals patterns sals readouts show larger strain amplitudes distinguish viscosity crossover amplitude oscillatory shear lower strain amplitudes directly comparable rheo annularly averaged rheo suspensions exhibit concentration anisotropic scattering signatures local optical anisotropy scattering signatures strain amplitude shear rheology rate viscosity lower concentrations empirical viscosity crossover concentration induced anisotropy amplitude ranges later sals cnc suspensions multiscale rheo results provide responses emerge polarized imaging noncoincident responses mechanical yielding linear viscoelasticity evolves continuously compare mechanical c </ based signature apparent contraction anisotropic x >< sub Aqueous surface-charged cellulose nanocrystal (CNC) suspensions exhibit concentration-dependent viscosity growth, gelation, and deformation-induced anisotropy, but the concentration and strain-amplitude ranges over which these responses emerge are not necessarily the same. Here, low-shear rheology and linear viscoelasticity are combined with rheo-polarized imaging (Rheo-PI) and rheo-small-angle light scattering (Rheo-SALS) to compare mechanical, optical, and scattering signatures in the same CNC system. Analysis of the operational low-rate viscosity and the Winter–Chambon criterion separates an empirical viscosity-crossover concentration, <i>C</i>_cross, from the sol–gel transition concentration, <i>C</i>_g. Under fixed-frequency large-amplitude oscillatory shear (LAOS), nonphase-resolved but directly comparable Rheo-PI and Rheo-SALS readouts show that annularly averaged Rheo-PI retardation becomes detectable at lower concentrations and lower strain amplitudes than those required for the appearance of anisotropic X-shaped SALS patterns. The first optical transition approximately coincides with an apparent contraction of initially circular SALS patterns, whereas clearly directional X-shaped SALS patterns appear only at larger strain amplitudes. The X-shaped lobe geometry then evolves continuously with the strain amplitude, providing a later SALS-based signature of directional mesoscopic anisotropy under the imposed LAOS conditions. Together, these results provide a comparative multiscale map of deformation-induced anisotropy in CNC suspensions and distinguish viscosity crossover, gelation, local optical anisotropy, mechanical yielding, and anisotropic scattering signatures as related but noncoincident responses. 2026-09-25T00:00:00Z Dataset Media 10.1021/acs.langmuir.6c03702.s002 https://figshare.com/articles/media/Multiscale_Rheo-Optical_and_Scattering_Signatures_of_Deformation-Induced_Anisotropy_in_Aqueous_Cellulose_Nanocrystal_Suspensions_under_Large-Amplitude_Oscillatory_Shear/34001605 CC BY-NC 4.0