A polymer blend from Gum Arabic and Sodium Alginate - preparation and characterization

Nair, Renjini M.; Bindhu, B.; Reena, Viswan L.

doi:10.1007/s10965-020-02128-y

Cited by 46 publications

(17 citation statements)

References 12 publications

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“…The diffraction model of all the blend compositions is dissimilar to neat polymers indicating the extinction of intermolecular interactions in the blends. Consequently, the diffraction model of all the blend compositions shifts decreasingly a broad peak 2θ = 16-34 ο betokens the amorphous nature subsequently no change in amorphous to crystalline observed owing to the transformation of the random coil to the βsheet conformation of the poly(IPAVG) content in the blends [43]. Therefore, the immiscibility of these blends is governed by the nature of the amorphous segment with the semicrystalline phase.…”

Section: X-ray Diffraction Studies (Xrd)mentioning

confidence: 83%

Blends of synthetic plastic-derived polypeptide with Hydroxypropylmethylcellulose and polyvinyl alcohol: unraveling the specific interaction parameters, morphology and thermal stability of the polymers couple

et al. 2020

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The medleys of the plastic-derived polypeptide with commercially available polymers believably the suitable candidate for pharmaceutical and biomedical importance. The current research is focussed on the synthesis of a novel plastic-mimetic polypeptide (PLP), poly(IPAVG) by the solution phase method (where I, P, A, V, and G represent Isoleucine, Proline, Alanine, Valine, and Glycine, respectively). The miscibility attributes of PLP/polyvinyl alcohol (PVA) and PLP/ hydroxypropylmethylcellulose (HPMC) blends were examined by viscometry and by other advanced analytical tools for different weight proportions. It is shown by the viscometry that the PLP/HPMC and PLP/PVA form an immiscible blend system at 10 ο C and further, the FTIR spectra of poly (IPAVG) /HPMC and poly (IPAVG) /PVA blend membranes manifest the lack of intermolecular interactions. DSC results proved the dual Tg for one blend proportion and lower Tg values for all other blend systems. The thermal property of the blends with different compositions was evaluated by thermogravimetric analysis (TGA). The TGA results showed that the blends possess inferior thermal stability to the native ones. The surface morphology was analyzed by SEM indicated the heterogeneity and X-ray diffraction (XRD) revealed the absence of any change in crystallinity advocated the immiscibility of the blends. Further, we ventured to prepare the non-woven fabrics from the solutions of 1-10 wt% concentrations at the voltages within 20-30 kV by electrospinning. The droplet formed at the spinneret failed to reach the collector plate, and consequently, no films developed for the collector device.

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Section: X-ray Diffraction Studies (Xrd)mentioning

confidence: 83%

Blends of synthetic plastic-derived polypeptide with Hydroxypropylmethylcellulose and polyvinyl alcohol: unraveling the specific interaction parameters, morphology and thermal stability of the polymers couple

et al. 2020

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“…DSC thermograms of the SA, free naringin, PM, and microspheres are shown in Figure 4 A. Naringin showed a dehydration band at 98 °C and an endothermic peak at 164 °C, associated with the melting point of crystalline naringin [ 29 ]. For the SA, the endothermic peak appeared at 78 °C, which could be attributed to the dehydration process or the melting of SA; an exothermic peak at approximately 250 °C, referred to as the melting temperature, and chemical changes also took place at this temperature [ 30 ]. Compared with the free naringin powder, the PM still had dehydration bands under 100 °C.…”

Section: Resultsmentioning

confidence: 99%

“…Naringin showed a dehydration band at 98 • C and an endothermic peak at 164 • C, associated with the melting point of crystalline naringin [29]. For the SA, the endothermic peak appeared at 78 • C, which could be attributed to the dehydration process or the melting of SA; an exothermic peak at approximately 250 • C, referred to as the melting temperature, and chemical changes also took place at this temperature [30]. Compared with the free naringin powder, the PM still had dehydration bands under 100 • C. The endothermic peak of naringin was concealed in the PM, which could be explained by the low proportion of naringin and the dissolution of melt SA.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Preparation, Physicochemical Characterization, and Antioxidant Activity of Naringin–Silk Fibroin–Alginate Microspheres and Application in Yogurt

Wang

Zhang

et al. 2022

Foods

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Naringin is the major polyphenol in bitter orange peel with antioxidant property. However, its pH sensitivity, low solubility, and bitter taste limit its application in food. In this study, naringin–sodium alginate–silk fibroin microspheres were prepared by the ionic gel method. The loading capacity and encapsulation efficiency of naringin in microspheres were 13.2% and 77.6%, respectively. The morphology of microspheres was characterized by scanning electron microscopy. The X-ray diffractometry and differential scanning calorimetry results showed naringin was amorphous after encapsulation. Fourier-transform infrared spectroscopy and molecular docking analysis confirmed the intermolecular hydrogen bonds between naringin and sodium alginate. Naringin could release from the microspheres continuously under different pH conditions. Compared with free naringin, the 2,2-diphenyl-1-picrylhydrazyl scavenging activity and the stability of naringin microspheres were significantly improved. The application of naringin microspheres in yogurt indicated the precipitation of whey could be effectively reduced and the decline rate of pH was inhibited. The study suggested that naringin encapsulated microspheres were beneficial for improving the shelf life of this bioactive product as well as providing a new idea for functional yogurt.

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“…Alg showed the typical DSC curve of polysaccharide materials with hydroxyl and carboxyl functionalities in the repeating units, with a first transition at 95 °C, assigned to the evaporation of moisture from the polymer [ 48 ], and a broad exothermic at 243 °C, expressing the formation of CO 2 , CH 4 , and H 2 O from polysaccharide chains due to decomposition at a higher temperature [ 49 ]. The decomposition involves different kinds of chemical reactions, including depolymerization, elimination of oxygen-rich functionalities in the side chains, chain scissions, recombination, and cross-linking, which can be accelerated in the presence of radical species [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Alginate Bioconjugate and Graphene Oxide in Multifunctional Hydrogels for Versatile Biomedical Applications

et al. 2021

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In this work, we combined electrically-conductive graphene oxide and a sodium alginate-caffeic acid conjugate, acting as a functional element, in an acrylate hydrogel network to obtain multifunctional materials designed to perform multiple tasks in biomedical research. The hybrid material was found to be well tolerated by human fibroblast lung cells (MRC-5) (viability higher than 94%) and able to modify its swelling properties upon application of an external electric field. Release experiments performed using lysozyme as the model drug, showed a pH and electro-responsive behavior, with higher release amounts and rated in physiological vs. acidic pH. Finally, the retainment of the antioxidant properties of caffeic acid upon conjugation and polymerization processes (Trolox equivalent antioxidant capacity values of 1.77 and 1.48, respectively) was used to quench the effect of hydrogen peroxide in a hydrogel-assisted lysozyme crystallization procedure.

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A polymer blend from Gum Arabic and Sodium Alginate - preparation and characterization

Cited by 46 publications

References 12 publications

Blends of synthetic plastic-derived polypeptide with Hydroxypropylmethylcellulose and polyvinyl alcohol: unraveling the specific interaction parameters, morphology and thermal stability of the polymers couple

Blends of synthetic plastic-derived polypeptide with Hydroxypropylmethylcellulose and polyvinyl alcohol: unraveling the specific interaction parameters, morphology and thermal stability of the polymers couple

Preparation, Physicochemical Characterization, and Antioxidant Activity of Naringin–Silk Fibroin–Alginate Microspheres and Application in Yogurt

Alginate Bioconjugate and Graphene Oxide in Multifunctional Hydrogels for Versatile Biomedical Applications

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