Thermal and viscoelastic properties of alginate/poly(vinyl alcohol) blends cross-linked with calcium tetraborate

Miura, Kenshi; Kimura, Naoki; Suzuki, Hidematsu; Miyashita, Yoshiharu; Nishio, Yoshiyuki

doi:10.1016/s0144-8617(98)00162-3

Cited by 74 publications

(35 citation statements)

References 19 publications

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“…It was suggested earlier that polymer-polymer miscibility can be determined on the basis of glass transition temperature of the blend [42]. The DSC thermograms of composite films are illustrated in Figs.…”

Section: Dsc Studiesmentioning

confidence: 99%

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

Mishra

Ramasamy

Lim

et al. 2014

J Mater Sci: Mater Med

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The present study investigates the development of methyl cellulose (MC)-sodium alginate (SA)-montmorillonite (MMT) clay based bionanocomposite films with interesting wound healing properties. The differential scanning calorimetry analysis of the composite films revealed presence of single glass transition temperature (Tg) confirming the miscible nature of the ternary blended films. The increase in MMT ratio in the composite films reduced the mobility of biopolymer chains (MC/SA) which increased the Tg of the film. Thermogravimetric analysis showed that dispersion of clay (MMT) at nano level significantly delayed the weight loss that correlated with higher thermal stability of the composite films. It was observed that the developed films were able to exhibit antimicrobial activity against four typical pathogenic bacteria found in the presence of wound. The developed films were able to significantly inhibit (10 mg/ml) the growth of Enterococcus faecium and Pseudomonas aeruginosa. In vitro scratch assay indicated potential wound closure activities of MC-2-4 bionanocomposite films at their respective highest subtoxic doses. In conclusion, these ternary bionanocomposite films were found to be promising systems for wound healing applications.

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Section: Dsc Studiesmentioning

confidence: 99%

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

Mishra

Ramasamy

Lim

et al. 2014

J Mater Sci: Mater Med

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“…Among which, the addition of SA significantly increased (p<0.05) the HR when added content be equal or greater than 0.5%. It was speculated that SA has abilities of high water affinity and thermostability (Miura et al 1999), and resulted in the same properties for extrusion reform rice. In order to improve the HR of reform rice, SR and SA were selected for complex reform rice preparation.…”

Section: Dg Bd Wai and Hrmentioning

confidence: 99%

Emulsifiers and thickeners on extrusion-cooked instant rice product

Wang

Jin

et al. 2011

J Food Sci Technol

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Extrusion-cooked instant rice was prepared by optimizing the formulation with emulsifiers, glycerol monostearate (GMS), soybean lecithin (LC), and sodiumstearoyl lactylate (SSL), and thickeners, gum Arabic (GA), sodium alginate (SA), and sticky rice (SR). The emulsifiers addition caused increase of degree of gelatinization (DG), and decrease of water soluble carbohydrate (WSC), α-amylase sensitivity, water soluble index (WAI) and adhesive for extrudates, while the thickeners addition increased extrudates DG, bulk density (BD), WSC, α-amylase sensitivity, WAI, hydration rate (HR) and adhesiveness. Based on the data generated by a single additive at various levels, optimum formulation was obtained employing orthogonal matrix system with combination of the selected additives for extrusion cooking. Extrudates were evaluated for optimum hydration time followed by drying to prepare the finished product. Texture profile analysis and sensory evaluation indicate that quality of the finished product is equivalent to that of the round shaped rice and superior to a commercial instant rice product. This study also demonstrates possibility of value-added and versatile instant rice product development using broken rice.

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“…[4][5][6][7][8] Therefore, to overcome these problems, solution blends of synthetic and natural polymers have been prepared and spun into nanofibers. [8][9][10] Alginates form a group of polysaccharides that occur in the cell walls of brown seaweed and are comprised of linear chains of (1,4)-b-D-mannuronic acid and (1,3)-a-L-guluronic acid. [11][12][13][14][15] Sodium alginate (NaAlg), a polyelectrolyte with many merits such as biological origin, biodegradability, and biocompatibility, has been extensively reevaluated and used recently as an attractive natural resource in biomedical applications such as wound dressing, [16][17][18][19][20] drug carrier, 21,22 tissue engineering scaffold, 23,24 and so forth.…”

Section: Introductionmentioning

confidence: 99%

“…8 PVA and NaAlg are both biodegradable polymers, which exhibit no pollution to environment. 8,10 In contrast to the numerous studies carried out on the physical properties and industrial applications of alginate gels, [11][12][13]15,23,28 there have been only a few studies dealing with alginate/synthetic polymer blends in the film form. 9,10 However, no report about electrospinning of nanofiber mats from solution of NaAlg or solution blends of NaAlg/PVA and NaAlg/PEO was found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Study of electrospinning of sodium alginate, blended solutions of sodium alginate/poly(vinyl alcohol) and sodium alginate/poly(ethylene oxide)

Safi¹,

Morshed²,

Ravandi³

et al. 2007

J of Applied Polymer Sci

162

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Alginate is an interesting natural biopolymer for many of its merits and good biological properties. This paper investigates the electrospinning of sodium alginate (NaAlg), NaAlg/PVA-and NaAlg/PEO-blended systems. It was found in this research that although NaAlg can easily be dissolved in water, the aqueous NaAlg solution could not be electrospun into ultrafine nanofibers. To overcome the poor electrospinnability of NaAlg solution, synthetic polymers such as PEO and PVA solutions were blended with NaAlg solution to improve its spinnability. The SEM images of electrospun nanofibers showed that the alginate (2%, w/v)-PVA (8%, w/v) blended system in the volume ratio of 70 : 30 and the alginate (2%, w/v)-PEO (8% w/v) blended system in the volume ratio of 50 : 50 could be electrospun into finest and uniform nanofibers with average diameters of 118.3 nm (diameter distribution, 75.8-204 nm) and 99.1 nm (diameter distribution, 71-122 nm), respectively. Rheological studies showed a strong dependence of spinnability and fiber morphology on solution viscosity and thus on the alginate-to-synthetic polymer (PVA or PEO) blend ratios. FTIR studies indicate that there are the hydrogen bonding interactions due to the ether oxygen of PEO (or the hydroxyl groups of PVA) and the hydroxyl groups of NaAlg.

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Thermal and viscoelastic properties of alginate/poly(vinyl alcohol) blends cross-linked with calcium tetraborate

Cited by 74 publications

References 19 publications

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

Antimicrobial and in vitro wound healing properties of novel clay based bionanocomposite films

Emulsifiers and thickeners on extrusion-cooked instant rice product

Study of electrospinning of sodium alginate, blended solutions of sodium alginate/poly(vinyl alcohol) and sodium alginate/poly(ethylene oxide)

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