Rheological properties of concentrated polyacrylonitrile co-polymer and lignin blend solution

Porkodi, P.; Abhilash, J. K.; Shukla, Hemant Kumar; Rawat, J. K.

doi:10.1007/s00289-019-02944-3

Cited by 13 publications

(15 citation statements)

References 22 publications

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“…To be precise, a high τ y and a low slope of the Cole-Cole plot indicate a high presence of the solid-like network that causes heterogeneity. 35,36 Interestingly, the percolation thresholds determined from these two parameters differed from each other (Figure 6(c)). The Cole-Cole slopes exhibit a sudden drop from 1.2 (neat PBS) to 0.5 (CNC0.6) and level off thereafter.…”

Section: Rheological Percolation Analysis Of Pbs-cnc Nanocompositesmentioning

confidence: 92%

Rheological Percolation of Cellulose Nanocrystals in Biodegradable Poly(butylene succinate) Nanocomposites: A Novel Approach for Tailoring the Mechanical and Hydrolytic Properties

et al. 2021

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Section: Rheological Percolation Analysis Of Pbs-cnc Nanocompositesmentioning

confidence: 92%

Rheological Percolation of Cellulose Nanocrystals in Biodegradable Poly(butylene succinate) Nanocomposites: A Novel Approach for Tailoring the Mechanical and Hydrolytic Properties

et al. 2021

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“…The previous equation shows the relationship between the loss modulus G″, the angular frequency w , the viscosity coefficient k and the yield stress σ 0 . The yield stress, minimun energy to break the polymer solutions, can be obtained after plotting G″ 1/2 against w 1/2 (plot interception) as was done in [ 30 ].…”

Section: Methodsmentioning

confidence: 99%

Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite®

2021

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The rheological behavior, in terms of steady and oscillatory shear flow, of Laponite® with different polysaccharides (alginate, chitosan, xanthan gum and levan) in salt-free solutions was studied. Results showed that a higher polymer concentration increased the zero-rate viscosity and decreased the critical strain rate (Cross model fit) as well as increasing the elastic and viscous moduli. Those properties (zero-rate viscosity and critical strain rate) can be a suitable indicator of the effect of the Laponite® on the shear flow behavior for the different solutions. Specifically, the effect of the Laponite® predominates for solutions with large critical strain rate and low zero-rate viscosity, modifying significantly the previous parameters and even the yield stress (if existing). On the other hand, larger higher polymeric concentration hinders the formation of the platelet structure, and polymer entanglement becomes predominant. Furthermore, the addition of high concentrations of Laponite® increases the elastic nature, but without modifying the typical mechanical spectra for polymeric solutions. Finally, Laponite® was added to (previously crosslinked) gels of alginate and chitosan, obtaining different results depending on the material. These results highlight the possibility of predicting qualitatively the impact of the Laponite® on different polymeric solutions depending on the solutions properties.

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“…To yield void-free lignin/PAN-based wet-spun fibers, it is important to understand how the processing conditions (i.e., rheological behavior, solubility, etc.) [ 134 , 148 , 149 ] influence the precursor fiber properties (i.e., morphology, structure, and chemistry of the fibers) since precursor quality (spinning process, structural or morphological defects, etc.) greatly determines carbon fiber quality [ 37 ].…”

Section: Mechanical Performance Of Lignin-based Fibersmentioning

confidence: 99%

Lignin-Based High-Performance Fibers by Textile Spinning Techniques

Lin

Cheng

2021

Materials

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As a major component of lignocellulosic biomass, lignin is one of the largest natural resources of biopolymers and, thus, an abundant and renewable raw material for products, such as high-performance fibers for industrial applications. Direct conversion of lignin has long been investigated, but the fiber spinning process for lignin is difficult and the obtained fibers exhibit unsatisfactory mechanical performance mainly due to the amorphous chemical structure, low molecular weight of lignin, and broad molecular weight distribution. Therefore, different textile spinning techniques, modifications of lignin, and incorporation of lignin into polymers have been and are being developed to increase lignin’s spinnability and compatibility with existing materials to yield fibers with better mechanical performance. This review presents the latest advances in the textile fabrication techniques, modified lignin-based high-performance fibers, and their potential in the enhancement of the mechanical performance.

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Rheological properties of concentrated polyacrylonitrile co-polymer and lignin blend solution

Cited by 13 publications

References 22 publications

Rheological Percolation of Cellulose Nanocrystals in Biodegradable Poly(butylene succinate) Nanocomposites: A Novel Approach for Tailoring the Mechanical and Hydrolytic Properties

Rheological Percolation of Cellulose Nanocrystals in Biodegradable Poly(butylene succinate) Nanocomposites: A Novel Approach for Tailoring the Mechanical and Hydrolytic Properties

Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite®

Lignin-Based High-Performance Fibers by Textile Spinning Techniques

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