Effect of chitosan/modified montmorillonite coating on the antibacterial and mechanical properties of date palm fiber trays

Hassani, Fatima‐Zahra Semlali Aouragh; Bourakadi, Khadija El; Merghoub, Nawal; Qaiss, Abou el kacem; Bouhfid, Rachid

doi:10.1016/j.ijbiomac.2020.01.092

Cited by 37 publications

(19 citation statements)

References 31 publications

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“…In one of the studies, the treatment with clay suspension and filtrate resulted in a statistically significant reduction in the biofilm population of only gram-negative bacteria [17]. In some published sources, natural minerals were used in a modified form [18,19]. Silver halides in montmorillonite were obtained by dispersion in the dark.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Antimicrobial Activity Of Layered Silicate Materials

et al. 2021

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Objective — to assess the presence of a direct antimicrobial effect of natural minerals (ammonite; montmorillonite of the Azerbaijani deposit; calcium montmorillonite, or light clay, and sodium montmorillonite, or dark clay, of the Gerpegezh deposit in Kabardino-Balkaria; serpentinite) against strains of Staphylococcus aureus, Escherichia coli and yeast-like Candida fungi. Material and Methods — The antimicrobial activity was investigated by qualitative and quantitative methods; the methods of X-ray diffraction and X-ray fluorescence analysis were used to assess the chemical composition of samples of natural minerals. The results were statistically processed. Results — We established that ammonite, montmorillonite of Azerbaijani origin and serpentinite did not have a direct antimicrobial effect against the studied cultures of bacteria and fungi (S. aureus, E. coli, Candida albicans). The growth of S. aureus was suppressed by calcium and sodium montmorillonite from the Gerpegezh deposit. Sodium montmorillonite had the strongest antibacterial effect, and its dose-dependent effect was revealed. According to the data of X-ray fluorescence analysis, in the structure of, trivalent iron and oxides of manganese and titanium predominated in the samples of dark Gerpegezh clay with a more pronounced anti-staphylococcal effect. Conclusion — Our study demonstrated the possibilities and limitations of using various samples of layered silicate minerals for antibacterial solutions. The spectrum of antimicrobial activity largely depends on the unique composition of mineral complexes. Samples with a high content of iron(III) can be considered promising in the development of natural antimicrobial preparations.

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Section: Discussionmentioning

confidence: 99%

In Vitro Antimicrobial Activity Of Layered Silicate Materials

et al. 2021

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“…The alkali-treated bers (AT-F) were bleached using a sodium chloride solution (NaClO 2 at 1.7 wt%) in an acidic environment (pH 4-5) at 95 C (oil bath) with continuous stirring for 5 h, as detailed in our previous works. 9,10 The mixture was then allowed to cool before being ltered, rinsed thoroughly with distilled water, and then oven dried at 60 C, resulting in bleached cellulose bers (BC-F).…”

Section: Fiber Preparationmentioning

confidence: 99%

“…Indeed, the bleaching process caused a total or partial brillation and cleaned the ber surface of a great amount of impurities, such as lignin, which are responsible for the bers sticking. 9,26 Coating the cellulosic papers with starch polymer resulted in better interfacial adhesion, while it was clear that the cellulose/starch cellulosic papers showed quite different morphologies compared to the citric acid-crosslinked ones.…”

Section: Morphological Analysismentioning

confidence: 99%

“…On the other hand, the addition of the crosslinked starch contributed to a greater improvement of the intermolecular interactions, resulting in better exibility without sacricing the strength, which was in good agreement with the tensile and SEM results. 9,12 The loss factor (tan d) is the ratio of energy loss to energy stored per cycle deformation and its peak represents the glass transition temperature. 60 In other words, it gives information on how well a material absorbs energy.…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

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Crosslinked starch-coated cellulosic papers as alternative food-packaging materials

et al. 2022

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“…This is especially the case for thermoplastics reinforced with short natural fibers, due to its ability to produce net-shaped materials with high dimensional stability in a relatively short cycle time. 1–4 For these bio-composites, the overall performances (high strength-to-weight ratio, high stiffness, and possibility to control anisotropy) are important, but a successful composite design requires a good estimation of the produced part properties before production. 1,2,5…”

Section: Introductionmentioning

confidence: 99%

Injection molding of short fiber thermoplastic bio-composites: Prediction of the fiber orientation

AouraghHassani

Achaby

Bensalah

et al. 2020

Journal of Composite Materials

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Injection molding of short fiber reinforced thermoplastic polymer results in a preferential fiber orientation in the part, which leads to an anisotropy in the material mechanical properties. To anticipate the molded part performances, it is necessary to predict the fiber orientation pattern. Our goal is to have a practical tool that accurately predicts fiber orientation patterns, and to use that information to estimate the final product properties. Consequently, an efficient way to determine the flow induced fiber orientation for different flow cases under real injection molding conditions is presented. The proposed approach allows the average orientation angle prediction in a section by considering the close interaction between the fibers and the flow rheology, the fibers aspect ratio and the mold geometry. Finally, to validate the model, experimental data were taken with different matrices, fibers and mold geometries, where good agreements (R2 ≥ 0.8) were obtained for the fiber orientations measurements.

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Effect of chitosan/modified montmorillonite coating on the antibacterial and mechanical properties of date palm fiber trays

Cited by 37 publications

References 31 publications

In Vitro Antimicrobial Activity Of Layered Silicate Materials

In Vitro Antimicrobial Activity Of Layered Silicate Materials

Crosslinked starch-coated cellulosic papers as alternative food-packaging materials

Injection molding of short fiber thermoplastic bio-composites: Prediction of the fiber orientation

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