Quaternary ammonium‐functionalized polymers in biodegradable matrices: Physicochemical properties, morphology, and biodegradability

Belkhir, Kedafi; Jegat, Corinne; Prochazka, Frédéric; Taha, Mohamed

doi:10.1002/app.45261

Cited by 7 publications

(8 citation statements)

References 49 publications

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“…This is in agreement with the other reported studies wherein CPT did not have any strong effects on the main structure of PLA . Owing to an insignificant amount of nisin coated on the film, the thermal properties of PLA films are not affected …”

Section: Resultssupporting

confidence: 93%

Antimicrobial activity of nisin‐coated polylactic acid film facilitated by cold plasma treatment

Wei

et al. 2018

J of Applied Polymer Sci

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In this investigation, the surface functionalization of polylactic acid (PLA) film has been carried out by cold plasma treatment (CPT) to facilitate the coating of nisin on its surface. The physical and chemical properties of PLA films, such as surface morphology, water contact angle (WCA), chemical structure, and dynamic mechanical thermal properties, after CPT were systematically investigated. The obtained results demonstrated that the oxygen/carbon (O/C) ratio of PLA films decreased from 0.46 to 0.40 with an increase in the time of CPT. As the time of CPT increased, the roughness at first increased to 6.24 nm for PLA30, but then decreased to 2.26 nm for PLA60, whereas WCA at first decreased to 51.06 but then increased to 75 . Attenuated total reflectance Fourier transform infrared spectroscopy confirmed the successful coating of nisin onto PLA films with CPT. As compared with the PLA film, PN60 decreased the total viable count of Listeria monocytogenes to 2.25 log 10 [CFU/mL]. The different antimicrobial abilities against L. monocytogenes indicated that CPT could affect the adsorption capacity of PLA surface.

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Section: Resultssupporting

confidence: 93%

Antimicrobial activity of nisin‐coated polylactic acid film facilitated by cold plasma treatment

Wei

et al. 2018

J of Applied Polymer Sci

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“…The synthesis of this polymer and its characterizations were detailed in previous works. [45][46][47][48] PLA-Q mean molecular weight was 6900 g.mol −1 , each branch was made of a linear chain of PLA of about 1000 g.mol −1 , the three branches were linked to a glycerol node to make the starshaped design. Quaternary ammonium compound with chloride as counter ion was grafted on chain ends of the star-shaped PLA, with a ratio of 4 molecules per branch, to make quaternary ammonium end-functionalized structures, with glass transition and melt temperatures of, respectively, 49.5 and 154.9 C.…”

Section: Methodsmentioning

confidence: 99%

“…Three branches star‐shaped polylactic acid bearing quaternary ammonium pendant groups (PLA‐Q) was studied, its chemical structure is shown in Scheme . The synthesis of this polymer and its characterizations were detailed in previous works . PLA‐Q mean molecular weight was 6900 g.mol −1 , each branch was made of a linear chain of PLA of about 1000 g.mol −1 , the three branches were linked to a glycerol node to make the star‐shaped design.…”

Section: Methodsmentioning

confidence: 99%

Rheological study of quaternary ammonium‐containing star‐shaped polylactic acid

Belkhir

Majesté

Jegat

et al. 2019

J of Applied Polymer Sci

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Quaternary ammonium-containing star-shaped polylactic acid (PLA-Q) is analyzed in melt rheology and found to follow a clustering behavior. The viscosity of this polymer is largely higher than its analog, of the same structure, without ammonium ions. This difference is attributed to physical interactions taking place between the ammoniums and hindering the flow of the melt polymer. The frequency sweeps of the storage (G 0 ) and loss (G 00 ) modulus of the melt PLA-Q are achieved at different temperatures and different shearing times. The iso-temperature and iso-time superposition of the resulting curves were achieved using, respectively, a temperature and a time shift factors, this superposition allowed the determination of the flow activation energy; its value corresponds to an ionic process confirming the ionic interactions. When the two shift factors are used simultaneously, a unique master curve of both G 0 and G 00 is obtained; this curve follows the Rouse model indicating the presence of two types of ionic associations within the melt polymer: a large number of multiplets having small size and a small number of clusters of larger size.

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“…A multitude of antimicrobial agents of organic and/or inorganic origin have been successfully incorporated into or coated onto PLA, eg, undergoing modification with heavy metals, quaternary ammonium compounds, and other synthetic bioactives . Nevertheless, legislative restrictions exist regarding the safety aspects of various antibacterial additives, with respect to toxicity and potential carcinogenic and teratogenic effects…”

Section: Introductionmentioning

confidence: 99%

Effect of polyethylene glycol plasticizer on long‐term antibacterial activity and the release profile of bacteriocin nisin from polylactide blends

Holčapková

Hurajová

Kucharczyk

et al. 2018

Polymers for Advanced Techs

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This work describes the synergetic effect of polyethylene glycol (PEG) in polylactide (PLA) blends, wherein the polyether acts as both the plasticizer and functional additive, ensuring the long-term antimicrobial activity of bacteriocin nisin. Two types of PEG with the molecular weights of 1000 and 6000 g.mol −1 (20 wt.%) were used to plasticize the PLA blends. The aforementioned bacteriocin nisin, at concentrations ranging between 0.02 and 0.15 wt.% (8000-60 000 IU.g −1 ), was incorporated into the samples by the solvent cast technique. The effect of various PEG on the structural, mechanical, and thermal properties of the PLA-based blends were investigated by scanning electron microscopy, Fourier transform infrared spectroscopy, stressstrain analysis, differential scanning calorimetry, and dynamic mechanical analysis, respectively. The antibacterial activity of the samples was detected by the agar diffusion technique against Micrococcus luteus. Furthermore, the antibacterial properties of the samples were tested according the ISO 22196 standard against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus, Listeria monocytogenes) bacterial strains. The nisin was detected by high performance liquid chromatography, the device having been equipped with a UV/vis detector. The results show that the PEG, besides its plasticizing effect, significantly enhances the release profile and sustains long-term antibacterial activity of nisin in a PLA matrix.

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Quaternary ammonium‐functionalized polymers in biodegradable matrices: Physicochemical properties, morphology, and biodegradability

Abstract: International audienc

Cited by 7 publications

References 49 publications

Antimicrobial activity of nisin‐coated polylactic acid film facilitated by cold plasma treatment

Antimicrobial activity of nisin‐coated polylactic acid film facilitated by cold plasma treatment

Rheological study of quaternary ammonium‐containing star‐shaped polylactic acid

Effect of polyethylene glycol plasticizer on long‐term antibacterial activity and the release profile of bacteriocin nisin from polylactide blends

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