Rheological investigations of water-soluble polysaccharides extracted from Moroccan seaweed Cystoseira myriophylloides algae

Abstract

The rheological properties and spectrum infrared of polysaccharides extracted from Cystoseira myriophylloides algae were investigated in the concentrations range from 3 to 9% (w/v) and at different temperatures. Results of rheological characteristics in a steady shear rate showed pseudoplastic properties and the dynamic rheological properties showed a fluid-like viscoelastic behavior. The flow and viscoelastic characteristics of polysaccharides were described using the power-law (the Ostwald model). The values of flow behavior index of the sample were close to unity (0.91) for 3% and it decreased up to 0.71 for 9% revealing the shear-thinning (pseudoplastic) nature of these polysaccharides. Moreover, the consistency coefficient increased non-linearly with concentration and it was described by a power law. The flow behavior as a function of temperature was satisfactorily described using the Arrhenius law and the activation energy values were extracted. It decreased from 15.68 and 17.21 kJ/mol when the concentration increased from 5 to 9% (w/v). Additionally, in dynamic rheological measurements, tan δ > 1 and G″ > G′ reveling a shear-thinning behavior. Finally, the analysis of the FTIR spectra of these polysaccharides showed the presence of uronic acid groups. This behavior would suggest that polysaccharides extracted from Cystoseira myriophylloides could be an interesting additive as thickeners.

Recent developments of Madhuca indica (Mahua) oil-based polymers: A mini review

“…3,4 Currently, many renewable resources are widely used on a larger scale for the development of polymeric materials due to their many benefits over their petroleum counterparts. 5,6 The most preferred natural materials are vegetable oils (VOs), cellulose and bio-fibres for polymer development. These materials have the potential to be used as green monomers or intermediates for polymer synthesis and have received great attention in the development of newer polymeric materials.…”

Rheological and tribological nature of flaxseed gum influenced by concentration and temperature and its application as a coating agent for potato chips

“…FSG could form a dissolved polysaccharide network (even at a lower concentration) when FSG molecules are hydrated by interacting water molecules (Liu et al., 2016). The influence of concentration may be associated with the existence of numerous macromolecules in structural disorder form, whose shapes constantly fluctuate because of Brownian motion (Zaim et al., 2020).…”

“…To elucidate the properties and stability of gums, numerous techniques have been studied including particle size distribution (PSD), rheology, and tribology (a subcategory of rheology) (Prakash Maran et al., 2013; Wang et al., 2017). Rheological characteristics of polysaccharide gums play a substantial role in their application in food systems (Zaim et al., 2020). The capability of gums to improve the texture of food (liquid or semisolid) is linked with its lubrication properties (You et al., 2021).…”

Green Polymer Nanocomposites for Skin Tissue Engineering

“…However, mechanical properties are better to be improved. Thus, satisfying specific and required parameters is the main goal of tissue engineers and biologists. , Keeping all of the above-mentioned in mind, natural biopolymers such as protein-based bionanocomposites and polysaccharide-based bionanocomposites or their combinations (as a very good couple) have extensively attracted scientists due to their great biomimicry and their perfect ability to provide biological and physicochemical properties of extracellular matrix. − Some of these bionanocomposites are more appealing to the researchers (such as silk, cellulose, collagen) due to their great performance in terms of immunomodulatory or antimicrobial effects. , Additionally, some studies address the utility of adding nanostructure materials to the mentioned biopolymers in applications such as scarless healing. , Thus, scientific communities are conducting their studies to serve the skin tissue engineering field in order to improve skin cell therapy, factor delivery to damaged site, and skin scaffold preparation using green nanocomposites. , …”