Antibacterial biopolymeric foams: Structure–property relationship and carvacrol release kinetics

Lopresti, Francesco; Botta, Luigi; Scaffaro, Roberto; Bilello, Vincenzo; Settanni, Luca; Gaglio, Raimondo

doi:10.1016/j.eurpolymj.2019.109298

Cited by 21 publications

(15 citation statements)

References 56 publications

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“…The presence of the filler affected the torque values that increased upon increasing the concentration of BC added. This result was expected since it is well known that solid particles tend to increase the viscosity of polymer melts [9]. In fact, the addition of 20 wt% of BC caused a steep increase in the torque values, which were higher than those of PBAT during the processing time.…”

Section: Preliminary Investigationsupporting

confidence: 56%

“…However, major concerns for traditional thermoplastics used for film preparation, commonly derived from fossil fuels, refer to the non-renewability and non-biodegradability of the raw materials chosen for their production, thus causing environmental issues [4,5]. Due to the rising attention towards eco-sustainable products, it is unsurprising that more and more research groups and industries are exploring the possibility of using new biodegradable and compostable polymers suitable for different applications [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Use of Biochar as Filler for Biocomposite Blown Films: Structure-Processing-Properties Relationships

et al. 2021

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In this work, biocomposite blown films based on poly(butylene adipate-co-terephthalate) (PBAT) as biopolymeric matrix and biochar (BC) as filler were successfully fabricated. The materials were subjected to a film-blowing process after being compounded in a twin-screw extruder. The preliminary investigations conducted on melt-mixed PBAT/BC composites allowed PBAT/BC 5% and PBAT/BC 10% to be identified as the most appropriate formulations to be processed via film blowing. The blown films exhibited mechanical performances adequate for possible application as film for packaging, agricultural, and compost bags. The addition of BC led to an improvement of the elastic modulus, still maintaining high values of deformation. Water contact angle measurements revealed an increase in the hydrophobic behavior of the biocomposite films compared to PBAT. Additionally, accelerated degradative tests monitored by tensile tests and spectroscopic analysis revealed that the filler induced a photo-oxidative resistance on PBAT by delaying the degradation phenomena.

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Section: Preliminary Investigationsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Use of Biochar as Filler for Biocomposite Blown Films: Structure-Processing-Properties Relationships

et al. 2021

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“…As clearly visible in Figure 1 A,B, the torque values highlight an increasing trend as a result of the filler introduction in the polymer matrix. This result was expected since it is well known that solid particles tend to increase the viscosity of polymer melts [ 30 ]. Interestingly, the torque behavior seems to be unaffected by the kind of MCC used since the torque curve shape did not significantly change by modifying the type of MCC.…”

Section: Resultsmentioning

confidence: 54%

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

et al. 2021

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This study explores the processability, mechanical, and thermal properties of biocompostable composites based on poly (butylene adipate-co-terephthalate) (PBAT) as polymer matrix and microcrystalline cellulose (MCC) derived from softwood almond (Prunus dulcis) shells (as-MCC) as filler at two different weight concentration, i.e., 10 wt% and 20 wt%. The materials were processed by melt mixing and a commercial MCC (c-MCC) was used as filler comparison. The fibrillar shape of as-MCC particles was found to change the rheological behavior of PBAT, particularly at the highest concentration. The melt mixing processing allowed obtaining a uniform dispersion of both kinds of fillers, slightly reducing the L/D ratio of as-MCC fibers. The as-MCC particles led to a higher increase of the elastic modulus of PBAT if compared to the c-MCC counterparts. Both the MCC fillers caused a drastic reduction of the elongation at break, although it was higher than 120% also at the highest filler concentrations. DSC analysis revealed that both MCC fillers poorly affected the matrix crystallinity, although as-MCC induced a slight PBAT crystallinity increase from 8.8% up to 10.9% for PBAT/as-MCC 20%. Therefore, this work demonstrates the great potential of MCC particles derived from almond shells as filler for biocompostable composites fabrication.

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“…In recent years, due to the increasing health concerns about food safety and the widespread environmental pollution caused by non-biodegradable food packaging, the development of biopolymer membranes has attracted increasing attention [ 1 , 2 , 3 , 4 , 5 ]. Films used for food packaging should protect food from external contaminants and prevent chemical, physical, and biological changes during storage [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of New Electrospun Poly(lactic acid) Nanofiber Antioxidative Active Packaging Films Containing MCM-41 Mesoporous Molecular Sieve Loaded with Phloridzin and Their Application in Strawberry Packaging

Xie

Cheng

et al. 2022

Nanomaterials

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Health concerns about food safety have increased in recent years. In order to ensure the safety and increase the shelf-life of food, many methods have been used to slow down the oxidation rate of food fat. In order to solve this problem, a new type of antioxidant-active packaging has emerged. Poly(lactic acid) (PLA) films containing phloridzin adsorbed on to an MCM-41 mesoporous molecular sieve were prepared by electrostatic spinning, using PLA as a film-forming substrate, phloridzin as an antioxidant, and MCM-41 as the adsorption and controlled release carrier. The physical properties of the new films—including microscopic structure, water vapor transmission rate, and fresh-keeping effects, as well as the mechanical, thermal, antioxidant, and antibacterial properties—were studied. When the mass ratio of MCM-41 to phloridzin is 1:2, the nanofiber membrane achieves a 53.61% free-radical scavenging rate and better antibacterial performance (85.22%) due to the high content of phloridzin (30.54%). Additionally, when the mass ratio of the molecular sieve to phloridzin is 1:2 and 3:4 (with the best antibacterial performance of 89.30%), the films significantly delay lipid oxidation in the strawberry packaging, allowing the fresh-keeping time to be extended to up to 21 days before mildew appears. In this study, an MCM-41 mesoporous molecular sieve was used to load phloridzin for the first time. The packaging film with phloridzin, MCM-41, and poly(lactic acid) were used as the raw materials and electrospinning technology was used to prepare the packaging film with antioxidant activity. The packaging film was used for the first time in the packaging of strawberries.

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Antibacterial biopolymeric foams: Structure–property relationship and carvacrol release kinetics

Cited by 21 publications

References 56 publications

Use of Biochar as Filler for Biocomposite Blown Films: Structure-Processing-Properties Relationships

Use of Biochar as Filler for Biocomposite Blown Films: Structure-Processing-Properties Relationships

PBAT Based Composites Reinforced with Microcrystalline Cellulose Obtained from Softwood Almond Shells

Preparation and Characterization of New Electrospun Poly(lactic acid) Nanofiber Antioxidative Active Packaging Films Containing MCM-41 Mesoporous Molecular Sieve Loaded with Phloridzin and Their Application in Strawberry Packaging

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