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6. Generation of Microplastics from Biodegradable Packaging Films Based on PLA, PBS and Their Blend in Freshwater and Seawater.

Author

Apicella, Annalisa, Malafeev, Konstantin V., Scarfato, Paola, and Incarnato, Loredana

Subjects
CRYSTALLINE polymers, POLYMER blends, PACKAGING film, FRESH water, MICROPLASTICS, POLYLACTIC acid
Abstract

Biodegradable polymers and their blends have been advised as an eco-sustainable solution; however, the generation of microplastics (MPs) from their degradation in aquatic environments is still not fully grasped. In this study, we investigated the formation of bio-microplastics (BMPs) and the changes in the physicochemical properties of blown packaging films based on polylactic acid (PLA), polybutylene succinate (PBS) and a PBS/PLA 70/30 wt% blend after degradation in different aquatic media. The tests were carried out in two temperature/light conditions to simulate degradation in either warm water, under sunlight exposure (named Warm and Light—W&L), and cold deep water (named Cold and Dark—C&D). The pH changes in the aqueous environments were evaluated, while the formed BMPs were analyzed for their size and shape alongside with variations in polymer crystallinity, surface and mechanical properties. In W&L conditions, for all the films, the hydrolytic degradation led to the reorganization of the polymer crystalline phases, strong embrittlement and an increase in hydrophilicity. The PBS/PLA 70/30 blend exhibited increased resistance to degradation with respect to the neat PLA and PBS films. In C&D conditions, no microparticles were observed up to 12 weeks of degradation. [ABSTRACT FROM AUTHOR]

Published
2024
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12. New Materials and Technologies for Durability and Conservation of Building Heritage

Author

Coppola, Luigi, primary, Bellezze, Tiziano, additional, Belli, Alberto, additional, Bianco, Alessandra, additional, Blasi, Elisa, additional, Cappello, Miriam, additional, Caputo, Domenico, additional, Chougan, Mehdi, additional, Coffetti, Denny, additional, Coppola, Bartolomeo, additional, Corinaldesi, Valeria, additional, D’Amore, Alberto, additional, Daniele, Valeria, additional, Di Maio, Luciano, additional, Di Palma, Luca, additional, Donnini, Jacopo, additional, Ferrara, Giuseppe, additional, Filippi, Sara, additional, Gastaldi, Matteo, additional, Generosi, Nicola, additional, Giosuè, Chiara, additional, Incarnato, Loredana, additional, Lamastra, Francesca, additional, Liguori, Barbara, additional, Macera, Ludovico, additional, Maqbool, Qaisar, additional, Mascolo, Maria Cristina, additional, Mavilia, Letterio, additional, Mazzoli, Alida, additional, Medici, Franco, additional, Mobili, Alessandra, additional, Montesperelli, Giampiero, additional, Pia, Giorgio, additional, Redaelli, Elena, additional, Ruello, Maria Letizia, additional, Scarfato, Paola, additional, Taglieri, Giuliana, additional, Tittarelli, Francesca, additional, Tulliani, Jean-Marc, additional, and Valenza, Antonino, additional

Published
2023
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14. Coextrusion Film Blowing of PHB, PLA and PBAT-based Blends for the Production of Biodegradable Food Packages.

Author

Apicella, Annalisa, Barbato, Antonio, Grimaldi, Margherita, Scarfato, Paola, and Incarnato, Loredana

Subjects
FOOD packaging, BIODEGRADABLE materials, MIXING, GAMMA-hydroxybutyrate, POLYLACTIC acid
Abstract

In this work, melt blending and co-extrusion techniques have been investigated as functionalization strategies to realize bilayer biodegradable films suitable for food packaging applications, combining enhanced barrier performance, good heat sealability and ductility. The ductile, heat sealable inner layer was realized by mixing Ecovio, a commercial blend based on polylactide (PLA) and polybutylene adipate terephthalate (PBAT) with an amorphous PLA grade; the outer barrier layer, on its side, was realized by blending poly(hydroxybutyrate) (PHB) with a semicrystalline PLA grade. Three different structures were realized changing the relative thicknesses of the two layers, and were characterized for their surface wettability, O2 barrier, heat-sealability and tensile properties. The results highlighted the impact of the bilayer films layout on the functional performance, and pointed out the attractiveness of the developed structures for food packaging applications where barrier to oxygen is critical to reduce oxidative processes. [ABSTRACT FROM AUTHOR]

Published
2023
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34. Preparation and characterization of PBT nanocomposites compounded with different montmorillonites

Author

Acierno, Domenico, Scarfato, Paola, Amendola, Eugenio, Nocerino, Giuseppe, and Costa, Giovanna

Subjects
Polymeric composites -- Research, Engineering and manufacturing industries, Science and technology
Abstract

Because of their superior mechanical and thermal properties, light weight, and favorable cost/performance ratio, nanocomposite materials appear to be suitable replacements for metals and alloys in many industrial applications in fields such as automotive, structural plastics, electronics, packaging, and so on (1). The technological relevance of this large-scale market for polymers is evidenced by the numerous patents issued over the last few years, even though only few applications have entered the market. Polymer-clay nanocomposite systems were successfully prepared by melt compounding using several thermoplastic matrices (polyamides, polyolefins, etc.), but few data are reported in the scientific literature on polyester-based nanocomposites (2). Because of the high commercial relevance of polyesters, we have investigated the effect of organoclay inclusion on the structure and properties of these hybrid systems. In particular, we have studied the relationships between processing conditions, hybrid composition (organoclay type and content), nanoscale morphology and properties of poly(butylene terephthalate) (PBT) nanocomposites based upon several commercial organo-modified montmorillonites at different weight percentages. The melt compounding was performed using a twin-screw extruder, at extrusion rates of 90 or 150 rpm. Polym. Eng. Sci. 44:1012-1018, 2004., INTRODUCTION Thermoplastic-based nanocomposites are attracting increasing interest in academia and industry because of their unique properties. The enhancement of structural and/or functional properties is achieved with the inclusion of very [...]

Published
2004

37. Rheological and mechanical properties of recycled polypropylene

Author

Incarnato, Loredana, Scarfato, Paola, and Acierno, Domenico

Subjects
Plastic scrap -- Research -- Waste management, Polypropylene -- Waste management, Recycle operations (Chemical technology) -- Research, Engineering and manufacturing industries, Science and technology, Waste management, Research
Abstract

In order to verify the possibility of manufacturing good quality articles by recycled polypropylene (PP), a study on the effect of many recycling operations on the rheological and mechanical properties of PP was conducted. The amount of degradation occurring during the reprocessing was estimated in the melt state by means of rheological measurements and the results obtained were correlated with the weight average molecular weight [M.sub.w] and the molecular weight distribution MWD. Since the properties in the solid state are strictly dependent upon the molecular structure parameters and the morphology, mechanical properties were checked on films produced from virgin and recycled PP with a cast technology. Moreover, in order to estimate the effect of film composition and of the number of reprocessings on the final properties of the manufactured articles, blend films having different percentages of PP recycled several times and virgin PP were prepared., INTRODUCTION In the plastics industry, reprocessing waste material arising from normal processing operations is a common practice. This procedure, known as primary recycling, is done because it allows processors to [...]

Published
1999

38. Development of PLA / PHB Blown Films with Improved Performance for Food Packaging Applications.

Author

Pietrosanto, Arianna, Scarfato, Paola, Di Maio, Luciano, and Incarnato, Loredana

Subjects
POLYLACTIC acid, FOOD packaging, GAMMA-hydroxybutyrate, ELASTIC modulus, POLYMERS
Abstract

In the present work, the suitability of Polylactic acid (PLA) / Poly-ß-hydroxybutyrate (PHB) blends for blown film extrusion was evaluated in a broad range of compositions, obtaining films with improved performance for food packaging applications. Blending PHB with PLA enhanced the processability of the systems for the film blowing process than neat PLA. Moreover, even though the polymers were found to be immiscible, the addition of PHB improved the crystallization of PLA, with a consequent increase in the stiffness, barrier properties and light-screening ability of the final developed systems. An increase in the ductility of the films was also achieved with a PHB content up to 30 wt.%. Correlations between the transparency and the crystallinity degree, and between the oxygen permeability and the elastic modulus of the films were also evaluated. [ABSTRACT FROM AUTHOR]

Published
2021
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40. Development of Recycled Blown Films Based on Post-Consumer Plastics Recovered from Seas And Rivers.

Author

Ferraioli, Raffaella, Di Maio, Luciano, Incarnato, Loredana, and Scarfato, Paola

Subjects
FLEXIBLE packaging, PLASTIC scrap, MONTMORILLONITE, ZEOLITES, GRAFT copolymers
Abstract

Post-consumer flexible packaging abandoned in seas and rivers represent an important environmental problem: their recovery is still a challenge and the management of the recovered material is equally difficult since, due to their heterogenicity and to their long-time permanence in seas or rivers, these plastics present various issues related to high incompatibility, hygroscopicity and presence of bad smells. All this translates into poor processability and mechanical performance and low organoleptic quality. The aim of this work is to characterize the seas and rivers plastic waste (SRPW) composition and to perform a preliminary investigation on the effectiveness of two different mineral fillers as reinforcing and compatibilizing agents for SRPW, in view of possible second-life applications of this waste. In particular, an organo-modified montmorillonite (Dellite 67G) and a natural sodium zeolite mineral (Zeolite 4A), loaded at 5 wt%, were considered for improving the processability and properties of SRPW blown films. The combined use of a polymeric compatibilizer (polyolefin block copolymer grafted with 0.4 wt% maleic anhydride was also considered, in order both to improve the filler dispersion within the polymer and to compatibilize the main constituents of SRPW. The results demonstrated that the addition of both fillers to SRPW leaves essentially unchanged the thermal stability, but gives interesting improvements mainly in terms of stiffness. The effects are more significant when the nanometric Dellite 67G is added, than for the micrometric Zeolite 4A, especially in compatibilized systems. [ABSTRACT FROM AUTHOR]

Published
2021
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41. Natural Nanozeolite as Desiccant and Reinforcement Additive in Recycled Polymer Blends from Post-Consumer Flexible Packaging.

Author

Garofalo, Emilia, Scarfato, Paola, Di Maio, Luciano, Protopapa, Antonio, and Incarnato, Loredana

Subjects
POLYMERS, POLYOLEFINS, NANOSTRUCTURED materials, POLYPROPYLENE, ZEOLITES
Abstract

This study concerned with the upgrading of a mixed polyolefin material, obtained by the sorting and mechanical recycling of flexible packaging of small size (< 0.125 m2). It is mainly composed of polyethylene and a minor amount of polypropylene, with traces of polar contaminants. These latter are responsible for material's hygroscopicity, which negatively affects its processability and final performances. In the present work, the recyclate was melt compounded with different amounts of a nanometric natural zeolite by means of a single-screw extruder. The idea was to take advantage of the potential double function of this additive, as desiccant and reinforcement. The neat recyclate and its blends with the nanozeolite were extruded in the form of ribbons that were submitted to tensile mechanical tests. Significant increases of both stiffness and strain at break were observed for the systems Fil-s/nanozeolite compared to the neat recyclate, due to an efficient drying and reinforcement action of the selected nanozeolite, despite the non-optimal dispersion of the nanofiller. [ABSTRACT FROM AUTHOR]

Published
2021
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46. Binders alternative to Portland cement and waste management for sustainable construction – Part 2

Author

Coppola, Luigi, primary, Bellezze, Tiziano, additional, Belli, Alberto, additional, Bignozzi, Maria C, additional, Bolzoni, Fabio, additional, Brenna, Andrea, additional, Cabrini, Marina, additional, Candamano, Sebastiano, additional, Cappai, Marta, additional, Caputo, Domenico, additional, Carsana, Maddalena, additional, Casnedi, Ludovica, additional, Cioffi, Raffaele, additional, Cocco, Ombretta, additional, Coffetti, Denny, additional, Colangelo, Francesco, additional, Coppola, Bartolomeo, additional, Corinaldesi, Valeria, additional, Crea, Fortunato, additional, Crotti, Elena, additional, Daniele, Valeria, additional, De Gisi, Sabino, additional, Delogu, Francesco, additional, Diamanti, Maria V, additional, Di Maio, Luciano, additional, Di Mundo, Rosa, additional, Di Palma, Luca, additional, Donnini, Jacopo, additional, Farina, Ilenia, additional, Ferone, Claudio, additional, Frontera, Patrizia, additional, Gastaldi, Matteo, additional, Giosuè, Chiara, additional, Incarnato, Loredana, additional, Liguori, Barbara, additional, Lollini, Federica, additional, Lorenzi, Sergio, additional, Manzi, Stefania, additional, Marino, Ottavio, additional, Marroccoli, Milena, additional, Mascolo, Maria C, additional, Mavilia, Letterio, additional, Mazzoli, Alida, additional, Medici, Franco, additional, Meloni, Paola, additional, Merlonetti, Glauco, additional, Mobili, Alessandra, additional, Notarnicola, Michele, additional, Ormellese, Marco, additional, Pastore, Tommaso, additional, Pedeferri, Maria Pia, additional, Petrella, Andrea, additional, Pia, Giorgio, additional, Redaelli, Elena, additional, Roviello, Giuseppina, additional, Scarfato, Paola, additional, Scoccia, Giancarlo, additional, Taglieri, Giuliana, additional, Telesca, Antonio, additional, Tittarelli, Francesca, additional, Todaro, Francesco, additional, Vilardi, Giorgio, additional, and Yang, Fan, additional

Published
2018
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47. Binders alternative to Portland cement and waste management for sustainable construction—part 1

Author

Coppola, Luigi, primary, Bellezze, Tiziano, additional, Belli, Alberto, additional, Bignozzi, Maria Chiara, additional, Bolzoni, Fabio, additional, Brenna, Andrea, additional, Cabrini, Marina, additional, Candamano, Sebastiano, additional, Cappai, Marta, additional, Caputo, Domenico, additional, Carsana, Maddalena, additional, Casnedi, Ludovica, additional, Cioffi, Raffaele, additional, Cocco, Ombretta, additional, Coffetti, Denny, additional, Colangelo, Francesco, additional, Coppola, Bartolomeo, additional, Corinaldesi, Valeria, additional, Crea, Fortunato, additional, Crotti, Elena, additional, Daniele, Valeria, additional, De Gisi, Sabino, additional, Delogu, Francesco, additional, Diamanti, Maria Vittoria, additional, Di Maio, Luciano, additional, Di Mundo, Rosa, additional, Di Palma, Luca, additional, Donnini, Jacopo, additional, Farina, Ilenia, additional, Ferone, Claudio, additional, Frontera, Patrizia, additional, Gastaldi, Matteo, additional, Giosuè, Chiara, additional, Incarnato, Loredana, additional, Liguori, Barbara, additional, Lollini, Federica, additional, Lorenzi, Sergio, additional, Manzi, Stefania, additional, Marino, Ottavio, additional, Marroccoli, Milena, additional, Mascolo, Maria Cristina, additional, Mavilia, Letterio, additional, Mazzoli, Alida, additional, Medici, Franco, additional, Meloni, Paola, additional, Merlonetti, Glauco, additional, Mobili, Alessandra, additional, Notarnicola, Michele, additional, Ormellese, Marco, additional, Pastore, Tommaso, additional, Pedeferri, Maria Pia, additional, Petrella, Andrea, additional, Pia, Giorgio, additional, Redaelli, Elena, additional, Roviello, Giuseppina, additional, Scarfato, Paola, additional, Scoccia, Giancarlo, additional, Taglieri, Giuliana, additional, Telesca, Antonio, additional, Tittarelli, Francesca, additional, Todaro, Francesco, additional, Vilardi, Giorgio, additional, and Yang, Fan, additional

Published
2018
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