Development of carboxymethyl xylan films with functional properties

Queirós, Lúcia C. C.; Sousa, Sónia; Duarte, Andreia; Domingues, Fernanda; Ramos, Ana

doi:10.1007/s13197-016-2389-3

Cited by 27 publications

(15 citation statements)

References 39 publications

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“…Pure oxygen was introduced into the outside chamber of the diffusion cell, and the permeation rate through the sample was measured until a steady state was reached. Oxygen permeability (OP) (cm 3 .µm/m 2 .day.kPa) was achieved by normalizing OTR with respect to the oxygen pressure (1 atm) and the thickness of the samples, using the Equation (6) [ 28 , 29 ]:

where e is the thickness of the films (µm), and ∆ p O 2 is the difference of oxygen partial pressure (Pa) between the two sides of the film.…”

Section: Methodsmentioning

confidence: 99%

Pullulan Films Containing Rockrose Essential Oil for Potential Food Packaging Applications

2020

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Active packaging is designed to control the development of decay- and disease-causing microorganisms and is emerging as a promising technology for extending shelf-life, maintaining food safety, reducing waste, and minimizing the risks for foodborne diseases. The goal of this work was to develop and characterize bioactive pullulan-based films, containing rockrose (Cistus ladanifer) essential oil. Among other abundant compounds (camphene, bornyl acetate and trans-pinocarveol), α-pinene was identified as the major compound of rockrose essential oil (39.25%). The essential oil presented stronger antibacterial activity against Gram-positive than against Gram-negative bacteria. The antioxidant results indicate the potential of the developed films to be used to package foods susceptible to oxidation and rancification, thus improving their shelf-life. Also, this study reflects the potential of rockrose essential oil, free or incorporated in pullulan, as a promising quorum sensing inhibitor, since it was able to interrupt intercellular communication, inhibiting violacein production. Electronic microscopy images showed the antibiofilm activity of the films with rockrose essential oil that were able to influence bacterial adhesion, which may be explained by the differences in the surface free energy of the films, as also determined.

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where e is the thickness of the films (µm), and ∆ p O 2 is the difference of oxygen partial pressure (Pa) between the two sides of the film.…”

Section: Methodsmentioning

confidence: 99%

Pullulan Films Containing Rockrose Essential Oil for Potential Food Packaging Applications

2020

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“…Pure oxygen was introduced into the outside chamber of the diffusion cell, being the permeation rate through the sample measured until reaching the steady state. Oxygen permeability (OP; cm 3 ·µm/m 2 ·day·kPa) was achieved by normalizing OTR with respect to the oxygen pressure (1 atm) and the thickness of the samples, using the following equation [ 18 , 21 ]: OP = (OTR/∆ p O 2 ) × e , where e is the thickness of the films (µm), and ∆ p O 2 is the difference of oxygen partial pressure (Pa) between the two sides of the film.…”

Section: Methodsmentioning

confidence: 99%

“…To observe the cross-section, bilayer films were gently cut with a thin blade. Subsequently, samples were placed on appropriate stubs and spray-coated with gold using a metal evaporator (Quorum Q150R ES, East Sussex, UK) [17,18].…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Section: Oxygen Permeabilitymentioning

confidence: 99%

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Design and Characterization of Bioactive Bilayer Films: Release Kinetics of Isopropyl Palmitate

et al. 2020

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Active packaging incorporating antioxidants and antimicrobials is creating a niche in the market and becoming increasingly important. The main goal of this work was the design of bioactive bilayer films (zein/pullulan) incorporating licorice essential oil. The bilayer films were fully characterized in terms of their chemical, physical, barrier, antioxidant, and antimicrobial properties. Furthermore, the release kinetics of isopropyl palmitate, the major compound of the licorice essential oil, was evaluated by HPLC-DAD (high-performance liquid chromatography coupled to diode-array detector). Scanning Electron Microscopy (SEM) micrographs of cross-sections of the bilayer films clearly show the two layers of the films. Besides presenting the capacity to scavenge free radicals and to inhibit the lipid peroxidation, the developed bilayer films were also able to inhibit the growth of known foodborne pathogens (Enterococcus faecalis and Listeria monocytogenes). The release kinetics profile of isopropyl palmitate from bilayer films incorporating licorice essential oil demonstrated that in 50% ethanol at room temperature, the release was more effective, suggesting that the bilayer films will be more efficient if applied to package semi-fatty food.

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“…Chitosan-xylan/cellulose nanowhiskers (CNW) nanocomposite films with antibacterial and antioxidant properties were successfully prepared where CNW was used as nanofillers [40] . Carboxymethylated xylan was blended with Agar (Ag), Ammonium zirconium carbonate (AZC) and linoleic acid (LA) to produce edible films with antimicrobial activity [41] . Even though, the studies of xylan for high-value added applications are still insufficient.…”

Section: Antimicrobial Nanostructured Films Based On Starch Has An Anmentioning

confidence: 99%

Preparation and Application of a Xylan-Based Antibacterial Additive Agent against <em>Escherichia Coli </em>Bacteria

Xu¹,

Song²,

He³

et al. 2019

Preprint

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In this work, a xylan-based antimicrobial additive agent was prepared and aimed for uses in paper products against Escherichia coli bacteria. The derived Cationic-Xylan-grafted-PHGH (CX-g-PHGH) was successfully synthesized by graft copolymerization of cationic-xylan with guanidine polymer (PHGH) using ceric ammonium nitrate as initiator. The obtained CX-g-PHGH had maximum PHGH grafting ratio of 18.45% and efficiency of 58.45%, and showed good viscosity and thermal stability. Furthermore, the paper samples prepared in this work were reinforced obviously with the addition of CX-g-PHGH by improved mechanical properties. Compared to the reference paper without any of the xylan-derivatives, the index of tensile, tear, burst and folding endurance of the paper had increases up to 20.07%, 25.31%, 30.20% and 77.78%, respectively. Moreover, the prepared CX-g-PHGH paper exhibited an efficient antimicrobial activity against E. coli bacterial, by which a lot of applications based on the new xylan-derived additive agent obtained in this work could be found, especially in field of antimicrobial paper products against E. Coli bacteria from contaminated food.

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Development of carboxymethyl xylan films with functional properties

Cited by 27 publications

References 39 publications

Pullulan Films Containing Rockrose Essential Oil for Potential Food Packaging Applications

Pullulan Films Containing Rockrose Essential Oil for Potential Food Packaging Applications

Design and Characterization of Bioactive Bilayer Films: Release Kinetics of Isopropyl Palmitate

Preparation and Application of a Xylan-Based Antibacterial Additive Agent against <em>Escherichia Coli </em>Bacteria

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