Persistence length of cellulose and cellulose derivatives in solution

Kamide, Kenji; Saito, Masatoshi; Suzuki, Hidemastu

doi:10.1002/marc.1983.030040108

Cited by 42 publications

(20 citation statements)

References 32 publications

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“…From rheology we conclude c D = 14.4g/L, and we estimate from our SANS results, we estimate ξ ( c D ) 80 Å, much larger than the estimated values of ξ T and of the order of the intrinsic Kuhn length ( ) reported in the literature for NaCMC. 17 , 18 c D is also much lower than that of flexible polyelectrolytes such as NaPSS, 34 , 73 or sodium polyacrylate 74 ( c D ∼ 1 M, ∼ 0.3). Similarly, low concentrations have been reported for salt free xanthan or alginate solutions 43 , 75 as well as poly (acrylamide-co-sodium 2-acrylamido-2-methylpropanesulfonate) with 10% degree of sulfonation.…”

Section: Discussionmentioning

confidence: 87%

“…= 1.2, 10–20% of the monomers will not be substituted and thus, even in the absence of large unsubstituted blocks, hydrophobic interactions from unsubstituted monomers remain. A range of intrinsic persistence lengths ( l 0 ) for NaCMC have been reported, varying from 5 to 15 nm 11 , 17 , 18 characteristic of a semiflexible polymer and typical of many polysaccharides. 18 , 19 …”

Section: Introductionmentioning

confidence: 99%

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Structure of sodium carboxymethyl cellulose aqueous solutions: A SANS and rheology study

Lopez

Rogers

Colby

et al. 2014

J Polym Sci B Polym Phys

160

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We report a small angle neutron scattering (SANS) and rheology study of cellulose derivative polyelectrolyte sodium carboxymethyl cellulose with a degree of substitution of 1.2. Using SANS, we establish that this polymer is molecularly dissolved in water with a locally stiff conformation with a stretching parameter. We determine the cross sectional radius of the chain ( 3.4 Å) and the scaling of the correlation length with concentration (ξ = 296 c−1/2Å for c in g/L) is found to remain unchanged from the semidilute to concentrated crossover as identified by rheology. Viscosity measurements are found to be in qualitative agreement with scaling theory predictions for flexible polyelectrolytes exhibiting semidilute unentangled and entangled regimes, followed by what appears to be a crossover to neutral polymer concentration dependence of viscosity at high concentrations. Yet those higher concentrations, in the concentrated regime defined by rheology, still exhibit a peak in the scattering function that indicates a correlation length that continues to scale as. © 2014 The Authors. Journal of Polymer Science Part B: Polymer Physics Published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 492–501

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Structure of sodium carboxymethyl cellulose aqueous solutions: A SANS and rheology study

Lopez

Rogers

Colby

et al. 2014

J Polym Sci B Polym Phys

160

View full text Add to dashboard Cite

show abstract

“…HPC is a β‐1,4‐linked propyl‐substituted neutral polysaccharide. Its chains are relatively stiff, with a persistence length of approximately 100 Å 1–3. Aqueous HPC has a liquid–liquid crystal phase transition, but only at concentrations far above those studied here.…”

Section: Introductionmentioning

confidence: 72%

Neutral polymer slow mode and its rheological correlate

O’Connell

Hanson

Phillies

2004

J Polym Sci B Polym Phys

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Quasi‐elastic light scattering spectroscopy intensity–intensity autocorrelation functions [S(k,t)] and static light scattering intensities of 1 MDa hydroxypropylcellulose in aqueous solutions were measured. With increasing polymer concentration, over a narrow concentration range, S(k,t) gained a slow relaxation. The transition concentration for the appearance of the slow mode (ct) was also the transition concentration for the solution‐like/melt‐like rheological transition (c+) at which the solution shear viscosity [ηp(c)] passed over from a stretched exponential to a power‐law concentration dependence. To a good approximation, we found ct[η] ≈ c+[η] ≈ 4, [η] being the intrinsic viscosity. The appearance of the slow mode did not change the light scattering intensity (I): from a concentration lower than ct to a concentration greater than ct, I/c fell uniformly with increasing concentration. The slow mode thus did not arise from the formation of compact aggregates of polymer chains. If the polymer slow mode arose from long‐lived structures that were not concentration fluctuations, the structures involved much of the dissolved polymer. At 25 °C, the mean relaxation rate of the slow mode approximately matched the relaxation rate for the diffusion of 0.2‐μm‐diameter optical probes observed with the same scattering vector. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 323–333, 2005

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“…First, the particular PGC chemistry exhibits significant rigidity due to the inherent stiffness and bulkiness of cyclic glucose monomers that limit conformational freedom, compared to the more commonly known vinyl-based polymers . The persistence length ( L p ) of neutral glucose-based polymers is known to range from several to tens of nanometers, and with charged and hydrophobic side chains of each PGC block, the electrostatic and steric repulsions are likely to further enhance the local chain stiffness. Second, during the PGC synthesis, all hydroxyl sites present in glucose are used for installation of side chain moieties or backbone linkages that lead to an overall hydrophobic sugar backbone.…”

Section: Results and Discussionmentioning

confidence: 99%

Hierarchical Self-Assembly of Poly(d-glucose carbonate) Amphiphilic Block Copolymers in Mixed Solvents

et al. 2020

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We report the fibril formation of poly(d-glucose carbonate) (PGC)-based amphiphilic diblock copolymers using solution assembly. Unlike conventional cylindrical micelles constructed from amphiphilic block copolymers (BCPs) with coil-like blocks, the assembled PGC fibrils exhibit thin, ribbon-like features due to significant stiffness and hydrophobicity of the PGC BCP backbone that result in a unique polymer chain packing. A tetrahydrofuran/H2O solvent mixture was used to create a solvent quality gradient during which a hierarchical assembly pathway was observed with fibril precursor nanoparticles that linked together into fibrils. These initial precursors were soft, patchy nanoparticles caused by the phase-segregated hydrophilic block of the PGC diblock copolymer. With aging, the patchy nanoparticles underwent unidirectional attachment through hydrophobic association to transform into uniform fibril structures. Transmission electron microscopy, interpretation of the small-angle neutron scattering measurements fit with analytical models, and genetic algorithm-based reverse engineering of structure confirmed the presence of initial particle precursors, intermediate stages during growth, and the fully matured fibrils. The results suggest that unconventional backbone chemistry-based molecules reveal unique effects of chain stiffness and hydrophobicity on block copolymer solution assembly when using glucose-based polycarbonates.

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Persistence length of cellulose and cellulose derivatives in solution

Cited by 42 publications

References 32 publications

Structure of sodium carboxymethyl cellulose aqueous solutions: A SANS and rheology study

Structure of sodium carboxymethyl cellulose aqueous solutions: A SANS and rheology study

Neutral polymer slow mode and its rheological correlate

Hierarchical Self-Assembly of Poly(d-glucose carbonate) Amphiphilic Block Copolymers in Mixed Solvents

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