Rheological properties of the methylcellulose gels in N,N-dimethyl formamide: Validity of scaling laws

Singh, Reeti; Kundu, Patit Paban

doi:10.1134/s0965545x13070092

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…On the other hand, nanohelix‐like arrangements in MC‐DMF gel were observed during X‐ray diffraction (XRD) studies with crystallite size 54 and 15 nm . In aqueous MC gels, the size of helix observed during cryogenic transmission electron microscopy is similar (15 nm) to that of XRD results of above‐stated DMF gels .…”

Section: Resultsmentioning

confidence: 62%

“…d and e that the bursting of beads takes place during gel–sol transformation. Since, the bead consists of helixes , during a degelation process, the entropy of sol state is greater than the gel state. Therefore, the randomness of the MC molecule present inside the beads develops a high pressure (due to successive collision), which is responsible for the sudden burst of the bead.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the internal energy is decreased resulting in the drop in entropy, and thus, the kinetic energy of beads may not be sufficient to collide to form the larger bead. So, the combination of beads manifests the formation of rods, leading to the formation of further strong gel network .…”

Section: Resultsmentioning

confidence: 99%

“…Earlier, many studies have been conducted on the gel properties of MC organic/aqueous system, such as the gel temperature and gel strength using a dynamical mechanical analyzer (under shear and compression mode). These properties are found to be functions of the molecular weight, degree of methyl substitution, concentration, and the presence of additives . Lott et al observed the formation of the fibrous structure of aqueous MC gels under cryogenic transmission electron microscopy that was further confirmed by small‐angle neutron scattering studies .…”

Section: Introductionmentioning

confidence: 92%

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Studies on rheological, thermal, and morphological properties of methylcellulose gel in aqueous medium

Singh¹,

Kundu

2019

Polymer Engineering & Sci

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The rheological, morphological, and thermal behavior of aqueous methylcellulose (MC) gels was investigated by optical microscope, dynamic mechanical analyzer (DMA), and differential scanning calorimeter. The double crossover between the storage modulus and loss modulus during the frequency scan in DMA suggests the transition from gel to sol state. These gel networks are comprised of bead-rod structures, which is visible under the optical microscope. Furthermore, the degelation mechanism of gels comprises of the thermodynamic viable bead burst phenomenon. The reheated samples of MC under dynamic compression show partial irreversibility of the MC aqueous system, indicating the possible presence of weakly coupled random coils and helix. The phenomenon of turbidity of MC aqueous gels is discussed with the help of a large bead model, in which the small-sized beads present in aqueous solution collide with each other to form large beads. FIG. 4. (a) Plot between storage and loss modulus as a function of frequency Hz for 5 wt% MC-4000 gel at 50 C. (b) Plot between storage and loss modulus as a function of frequency Hz for 5 wt% MC-1500 gel at 50 C. (c) Plot between storage and loss modulus as a function of frequency Hz for 5 wt% MC-4000 gel at 80 C. (d) Plot between storage and loss modulus as a function of frequency Hz for 5 wt% MC-1500 gel at 80 C. (e) Plot between storage and loss modulus as a function of frequency Hz for 5 wt% MC-25 gel at 80 C. [Color figure can be viewed at wileyonlinelibrary.com]

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Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

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Studies on rheological, thermal, and morphological properties of methylcellulose gel in aqueous medium

Singh¹,

Kundu

2019

Polymer Engineering & Sci

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Poly(Ionic) Liquid‐Enhanced Ion Dynamics in Cellulose‐Derived Gel Polymer Electrolytes

Paiva,

Klem,

Silvestre

et al. 2024

ChemSusChem

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Gel polymer electrolytes (GPEs) are regarded as a promising alternative to conventional electrolytes, combining the advantages of solid and liquid electrolytes. Leveraging the abundance and eco‐friendliness of cellulose‐based materials, GPEs were produced using methyl cellulose and incorporating various doping agents, either an ionic liquid (1‐Butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl)imide [Pyr14][TFSI]), its polymeric ionic liquid analogue (Poly(diallyldimethylammonium bis(trifluoromethylsulfonyl)imide) [PDADMA][TFSI]), or an anionically charged backbone polymeric ionic liquid (lithium poly[(4‐styrenesulfonyl)(trifluoromethyl(S‐trifluoromethylsulfonylimino) sulfonyl) imide] LiP[STFSI]). The ion dynamics and molecular interactions within the GPEs were thoroughly analyzed using Attenuated Total Reflectance Fourier‐Transform Infrared Spectroscopy (ATR‐FTIR), Heteronuclear Overhauser Enhancement Spectroscopy (HOESY), and Pulsed‐Field Gradient Nuclear Magnetic Resonance Diffusion (PFG‐NMR). Li+ transference numbers (tLi+) were successfully calculated. Our study found that by combining slow‐diffusing polymeric ionic liquids (PILs) with fast‐diffusing lithium salt, we were able to achieve transference numbers comparable to those of liquid electrolytes, especially with the anionic PIL, LiP[STFSI]. This research highlights the influence of the polymer's nature on lithium‐ion transport within GPEs. Additionally, micro supercapacitor (MSC) devices assembled with these GPEs exhibited capacitive behavior. These findings suggest that further optimization of GPE composition could significantly improve their performance, thereby positioning them for application in sustainable and efficient energy storage systems.

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Preparation and regeneration of a thermo-sensitive adsorbent material: methyl cellulose/calcium alginate beads (MC/CABs)

Jiang

et al. 2019

Polym. Bull.

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Rheological properties of the methylcellulose gels in N,N-dimethyl formamide: Validity of scaling laws

Cited by 8 publications

References 13 publications

Studies on rheological, thermal, and morphological properties of methylcellulose gel in aqueous medium

Studies on rheological, thermal, and morphological properties of methylcellulose gel in aqueous medium

Poly(Ionic) Liquid‐Enhanced Ion Dynamics in Cellulose‐Derived Gel Polymer Electrolytes

Preparation and regeneration of a thermo-sensitive adsorbent material: methyl cellulose/calcium alginate beads (MC/CABs)

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