Different Pla Grafting Techniques on Chitosan

Suyatma, Nugraha Edhi; Copinet, Alain; Legin-Copinet, Estelle; Fricoteaux, Florence; Coma, Véronique

doi:10.1007/s10924-010-0269-x

Cited by 60 publications

(78 citation statements)

References 12 publications

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“…Also, Suzuki et al [47] reported endothermic peaks of three kinds of agar gel at different positions ranging from 75°C to 90°C. According to some authors, this endothermic peak is related to the melting temperature [48]. However, it is often termed as dehydration temperature (T D ), attributed to the evaporation of water associated with the hydrophilic groups of the polymers [49,50] and reflects the strength of water-polymer interaction [51,52].…”

Section: Ftir Analysismentioning

confidence: 99%

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

El-Hefian

Nasef

Yahaya

et al. 2010

J. Chil. Chem. Soc.

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In this work, a number of mixture aqueous solutions of chitosan/agar (CS/AG) at different ratios (considering chitosan as the main component) were prepared. The rheological properties i.e. shearing viscosity and shear stress of the blend solutions as a function of shear rate as well as the thermal properties of the blend films were investigated. Among the parameters studied were temperature, shearing time and storage time. Results showed that almost Newtonian behavior was observed at temperatures from 40 o C to 55 o C for the ratios 100/0, 90/10, 80/20 and 70/30. However, the proportions 60/40 and 50/50 showed a clear shear thinning behavior (pseudoplastic non-Newtonian behavior). It was also found that all the blend solutions obeyed the Arrhenius equation. In addition, the effect of shearing time on the shearing viscosity of all blends did not show any significant differences at all shearing times applied in this study except the proportion 50/50 wherein decreasing in shearing viscosity and shear stress was observed as the shearing time increased. Furthermore, different behaviors were observed for the blend solutions when the period of storage was extended to three weeks. The FTIR results and the differential scanning calorimetery (DSC) curves showed that the interaction between chitosan and agar can occur.

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Section: Ftir Analysismentioning

confidence: 99%

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

El-Hefian

Nasef

Yahaya

et al. 2010

J. Chil. Chem. Soc.

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“…It is hydrophilic with a weak basic property and more soluble with higher antimicrobial activity than chitin [250,252]. Considering its biocompatibility, biodegradability, nontoxicity, bioadhesion, chelating and film-forming properties, and its affinity for nerve cells, chitosan is a promising material for biomedical, (active/edible) food packaging, food, and water treatment applications [250,[252][253][254]. The casting blend films of the blend solutions (i.e., chitosan (80-85% degree of deacetylation (DDA)) dissolved in acetic acid and PLA (M w ¼ 49 kDa) dissolved in chloroform and then blended) containing 10-30% PLA were immiscible (determined from T g 's, FTIR spectra, and tensile moduli) [254].…”

Section: Annually Renewable Biodegradable Materialsmentioning

confidence: 99%

“…They also prepared the films similar to Suyatma et al [254] by first dissolving separately chitosan in acetic acid (1 wt%) and PLLA in chloroform (1 wt%). After the chitosan and PLLA were completely dissolved, the two solutions were mechanically blended by stirring so that a homogeneous solution was prepared.…”

Section: Annually Renewable Biodegradable Materialsmentioning

confidence: 99%

“…Suyatma et al [254] and Li et al [257] prepared melt blends of chitosan/PLA at a temperature of 160-180 C. Water sorption and biocompatibility (due to an increase of hydrophilicity) of chitosan/PLA blends increased with increasing chitosan content [253,257,258]. Injection molded specimens prepared from melt blended 50/50 chitosan (85% DDA)/PLA had lower T g and T c than PLA, and lower tensile strength and elongation at break but higher tensile modulus [253].…”

Section: Annually Renewable Biodegradable Materialsmentioning

confidence: 99%

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Poly(Lactic Acid) Blends

et al. 2010

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“…Previous studies demonstrated the attractiveness of antimicrobial formulations within biopolymers in the form of nanoparticles [2]; TiO2, ZnO, Ag, carbon nanotubes, and MgO have been proposed as antimicrobial agents. Additionally, the processing of materials at the nanoscale enables the tuning in the bactericide capacity as function of particle size and concentration.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Assessment of the Antimicrobial Activity of Mgo – Calcium Alginate Porous Beads

Cedeño-Mattei

Perales-Pérez

2017

TECNIA

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RESUMENLa dispersión de nanopartículas antibacterianas en matrices poliméricas biocompatibles, no tóxicas y biodegradables permitirá el desarrollo de materiales más eficientes y efectivos para la conservación de alimentos, la eliminación de contaminantes y la protección contra microorganismos que comprometen la salud humana. Los materiales bactericidas nanométricos tienen una relación superficie / volumen muy grande que les permite interactuar con más copias de moléculas biológicas, y por lo tanto, mejorar la eficacia antimicrobiana. Más recientemente, se ha sugerido la actividad antimicrobiana del MgO amigable con el medio ambiente y químicamente estable. La incorporación de compuestos bactericidas en una matriz polimérica puede combinar la estabilidad física proporcionada por la matriz polimérica con las propiedades antimicrobianas de los agentes antimicrobianos dispersados como partıculas pequeñas sólidas. Sobre esta base, la presente investigación se centrará en el desarrollo de mezclas de partículas inorgánicas poliméricas biocompatibles, los denominados nanocompuestos, con actividad antimicrobiana sintonizable y mejorada. Se confirmó la actividad antimicrobiana de perlas de alginato cálcico -MgO (que oscilaban entre 0% y 40% p / p MgO) contra E. coli. Las perlas que contenían 20% p / p de MgO inhibían completamente el crecimiento bacterial de la E. coli ABSTRACTThe dispersion of antibacterial nanoparticles into bio-compatible, non-toxic and bio-degradable polymeric matrices will enable the development of more efficient and effective materials for food preservation, removal of contaminants, and protection against human health-compromising microorganisms. Nanometric bactericidal materials have a very large surface to volume ratio that enable them to attach more copies of biological molecules, and hence, enhance antimicrobial efficiency. More recently, the antimicrobial activity of environmental-friendly and chemically stable MgO has been suggested. The incorporation of bactericidal compounds into a polymeric matrix can combine physical stability provided by the polymeric matrix with the antimicrobial properties of antimicrobial agents dispersed as solid tiny particles. On this basis, the present research will be focused on the development of biocompatible polymer-inorganic particle mixtures, so-called nanocomposites, with tunable and enhanced antimicrobial activity. The antimicrobial activity of calcium alginate -MgO beads (ranging from 0% -40% w/w MgO) against E. coli was confirmed. Beads containing 20% w/w of MgO fully inhibited the E. coli. bacterial growth.

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Different Pla Grafting Techniques on Chitosan

Cited by 60 publications

References 12 publications

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

Preparation and Characterization of Chitosan/Agar Blends: Rheological and Thermal Studies

Poly(Lactic Acid) Blends

Synthesis, Characterization, and Assessment of the Antimicrobial Activity of Mgo – Calcium Alginate Porous Beads

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