Sodium alginate solutions: correlation between rheological properties and spinnability

Dodero, Andrea; Vicini, Silvia; Alloisio, Marina; Castellano, Maila

doi:10.1007/s10853-019-03446-3

Cited by 65 publications

(50 citation statements)

References 47 publications

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“…1 a Chemical structure of sodium alginate, chain conformations assumed in a saltfree environment (b) and in the presence of added salt (c) ~1.56, M v~4 00 kg/mol), and sodium chloride puriss (NaCl) were purchased from Sigma Aldrich. The molecular mass of the used samples was measured in our previous work (Dodero et al 2019b).…”

Section: Methodsmentioning

confidence: 99%

Rheological properties of sodium alginate solutions in the presence of added salt: an application of Kulicke equation

et al. 2020

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Mark-Houwink parameters are determined for sodium alginate with low (SA LV) and medium (SA MV) molecular mass via a rheological approach. Firstly, salt screening concentration and polyelectrolyte nature of the polymers are investigated. Despite both alginates behaving as neutral polymer in θ solvent, differences are observed between them with the strong associative nature of SA MV highlighted by an abnormal high viscosity concentration dependence compared with the predicted values. The polysaccharide-specific hydrodynamic volume (i.e., intrinsic viscosity) is determined via Fedors approach, which is proved to provide accurate results applicable to a wide concentration range. A viscosity-molecular mass-concentration relationship is finally derived to calculate Mark-Houwink parameters via a non-linear regression according to Kulicke equation; the obtained values are consistent with those reported in literature, confirming the semi-flexible nature of SA in the investigated environment and proving the effectiveness of the proposed approach for polyelectrolytes with added salt ions.

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Section: Methodsmentioning

confidence: 99%

Rheological properties of sodium alginate solutions in the presence of added salt: an application of Kulicke equation

et al. 2020

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“…On the other hand, these systems require complex, costly, and time-consuming fabrications methods that can hardly be applied on a very large area. To this end, polymers promise to reduce fabrication costs and simplify processes while allowing for the easy obtainment of square meter scale structures [4][5][6]. Actually, large area and industrial fabrications have already been reported for colloidal opals that are made of self-assembled microspheres [7] and for multilayered distributed Bragg reflectors (DBRs) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

High Refractive Index Inverse Vulcanized Polymers for Organic Photonic Crystals

et al. 2020

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Photonic technologies are nowadays dominated by highly performing inorganic structures that are commonly fabricated via lithography or epitaxial growths. Unfortunately, the fabrication of these systems is costly, time consuming, and does not allow for the growth of large photonic structures. All-polymer photonic crystals could overcome this limitation thanks to easy solubility and melt processing. On the other hand, macromolecules often do not offer a dielectric contrast large enough to approach the performances of their inorganic counterparts. In this work, we demonstrate a new approach to achieve high dielectric contrast distributed Bragg reflectors with a photonic band gap that is tunable in a very broad spectral region. A highly transparent medium was developed through a blend of a commercial polymer with a high refractive index inverse vulcanized polymer that is rich in sulfur, where the large polarizability of the S–S bond provides refractive index values that are unconceivable with common non-conjugated polymers. This approach paves the way to the recycling of sulfur byproducts for new high added-value nano-structures.

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“…The modification of the collector in order to facilitate the fabrication of the electrospun nanofibrous alginate was also reported [19,40,55,56]. In this regard, the electrically grounded collector is immersed in bi/multivalent ion aqueous solution for simultaneous crosslinking of the collected alginate nanofibers.…”

Section: Advanced Electrospinning Techniquesmentioning

confidence: 99%

“…The obtained tissue-like mats were found to consist of ribbon-like fibers (up to 5-6 µm) due to the fusion of nanofibers for the ternary system (Alginate/PEO/HA). Comparison between the conventional electrically grounded and collector immersed in a solution was conducted by Castellano and co-workers [56]. It was found that the conventional collector led to a collapsed structure having a less porous membrane with fiber diameter of 150 ± 30 nm, while the solution-immersed collector resulted in a highly porous structure with fiber diameters of 100 ± 30 nm.…”

Section: Advanced Electrospinning Techniquesmentioning

confidence: 99%

Electrospun Alginate Nanofibers Toward Various Applications: A Review

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Alginate has been a material of choice for a spectrum of applications, ranging from metal adsorption to wound dressing. Electrospinning has added a new dimension to polymeric materials, including alginate, which can be processed to their nanosize levels in order to afford unique nanostructured materials with fascinating properties. The resulting nanostructured materials often feature high porosity, stability, permeability, and a large surface-to-volume ratio. In the present review, recent trends on electrospun alginate nanofibers from over the past 10 years toward advanced applications are discussed. The application of electrospun alginate nanofibers in various fields such as bioremediation, scaffolds for skin tissue engineering, drug delivery, and sensors are also elucidated.

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Sodium alginate solutions: correlation between rheological properties and spinnability

Cited by 65 publications

References 47 publications

Rheological properties of sodium alginate solutions in the presence of added salt: an application of Kulicke equation

Rheological properties of sodium alginate solutions in the presence of added salt: an application of Kulicke equation

High Refractive Index Inverse Vulcanized Polymers for Organic Photonic Crystals

Electrospun Alginate Nanofibers Toward Various Applications: A Review

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