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- W2893875306 abstract "Gelation of aqueous methylcellulose (MC) solutions upon heating has been shown to result from the formation of a network of semiflexible fibrils, with diameters of 15 ± 2 nm. Here, we investigate the impact of MC molecular weight on the elasticity and structure of aqueous gels at concentrations between 0.1 and 3 wt %. Small-amplitude oscillatory shear measurements conducted at a fixed concentration reveal that the gel modulus increases monotonically by a factor of 5 for weight-average molecular weights (Mw) between 22 and 550 kg/mol. Small-angle X-ray scattering data, fit to a semiflexible cylinder model, demonstrate that the fibril radius, Kuhn length, and volume fraction are approximately constant throughout this molecular weight range. Small-angle light scattering shows that the fibrillar-rich and fibrillar-depleted domains within the gel are associated with an essentially invariant heterogeneity correlation length. Direct visualization by cryo-TEM reveals that lower molecular weight MC forms fibrils o..." @default.
- W2893875306 created "2018-10-05" @default.
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- W2893875306 date "2018-09-25" @default.
- W2893875306 modified "2023-10-17" @default.
- W2893875306 title "Molecular Weight Dependence of Methylcellulose Fibrillar Networks" @default.
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- W2893875306 doi "https://doi.org/10.1021/acs.macromol.8b01292" @default.
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