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Authors = Marcia Cristina Branciforti ORCID = 0000-0002-7203-765X

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9 pages, 2143 KiB  
Article
Degradation of Polypropylene and Jute Fiber-Reinforced Composites Exposed to Natural and Accelerated Aging: Mechanical Properties and Wettability
by Paula Bertolino Sanvezzo, Fernanda Pereira de Castro Negreiros and Marcia Cristina Branciforti
Chemistry 2021, 3(4), 1392-1400; https://doi.org/10.3390/chemistry3040100 - 23 Nov 2021
Cited by 5 | Viewed by 3430
Abstract
Population growth and the way resources are being exploited are directly affecting the environment. The natural fiber market, for example, is worth billions of dollars and a huge amount of the fibers becomes waste. This considerable amount of waste motivates the study of [...] Read more.
Population growth and the way resources are being exploited are directly affecting the environment. The natural fiber market, for example, is worth billions of dollars and a huge amount of the fibers becomes waste. This considerable amount of waste motivates the study of the fibers as a reinforcement in polymeric matrix, which benefits both the environmental sustainability and technical-commercial development of new materials with good properties and reduced cost. In this study, jute fiber-reinforced composites previously manufactured from an industrial waste (W), polypropylene, compatibilizer, and nano-calcium carbonate (N), were exposed to natural and accelerated aging. The composites were tested by infrared spectroscopy, contact angle (CA) measurement, and tensile test. Infrared analysis showed greater oxidative degradation after accelerated aging. All CA values continued above 90° after natural aging. Among all compositions, the ones with the presence of N had the highest CA values, showing that N acted as a waterproofing agent. After accelerated aging, a significant decrease in all CA values was observed. The composites did not show significant variation in the elastic modulus after either aging. Deformation at break decreased significantly for compositions with no jute fiber in both aging programs. No remarkable reduction was observed in the compositions with jute fibers. Full article
(This article belongs to the Special Issue Multiscale Analysis of Natural Fibre Composites)
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25 pages, 1792 KiB  
Review
Advantages and Disadvantages of Bioplastics Production from Starch and Lignocellulosic Components
by Mateus Manabu Abe, Júlia Ribeiro Martins, Paula Bertolino Sanvezzo, João Vitor Macedo, Marcia Cristina Branciforti, Peter Halley, Vagner Roberto Botaro and Michel Brienzo
Polymers 2021, 13(15), 2484; https://doi.org/10.3390/polym13152484 - 28 Jul 2021
Cited by 180 | Viewed by 35408
Abstract
The accumulation of plastic wastes in different environments has become a topic of major concern over the past decades; therefore, technologies and strategies aimed at mitigating the environmental impacts of petroleum products have gained worldwide relevance. In this scenario, the production of bioplastics [...] Read more.
The accumulation of plastic wastes in different environments has become a topic of major concern over the past decades; therefore, technologies and strategies aimed at mitigating the environmental impacts of petroleum products have gained worldwide relevance. In this scenario, the production of bioplastics mainly from polysaccharides such as starch is a growing strategy and a field of intense research. The use of plasticizers, the preparation of blends, and the reinforcement of bioplastics with lignocellulosic components have shown promising and environmentally safe alternatives for overcoming the limitations of bioplastics, mainly due to the availability, biodegradability, and biocompatibility of such resources. This review addresses the production of bioplastics composed of polysaccharides from plant biomass and its advantages and disadvantages. Full article
(This article belongs to the Special Issue Advances in Biodegradation of Plastics)
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21 pages, 2342 KiB  
Review
Biodegradation of Hemicellulose-Cellulose-Starch-Based Bioplastics and Microbial Polyesters
by Mateus Manabu Abe, Marcia Cristina Branciforti and Michel Brienzo
Recycling 2021, 6(1), 22; https://doi.org/10.3390/recycling6010022 - 22 Mar 2021
Cited by 73 | Viewed by 16630
Abstract
The volume of discarded solid wastes, especially plastic, which accumulates in large quantities in different environments, has substantially increased. Population growth and the consumption pattern of societies associated with unsustainable production routes have caused the pollution level to increase. Therefore, the development of [...] Read more.
The volume of discarded solid wastes, especially plastic, which accumulates in large quantities in different environments, has substantially increased. Population growth and the consumption pattern of societies associated with unsustainable production routes have caused the pollution level to increase. Therefore, the development of materials that help mitigate the impacts of plastics is fundamental. However, bioplastics can result in a misunderstanding about their properties and environmental impacts, as well as incorrect management of their final disposition, from misidentifications and classifications. This chapter addresses the aspects and factors surrounding the biodegradation of bioplastics from natural (plant biomass (starch, lignin, cellulose, hemicellulose, and starch) and bacterial polyester polymers. Therefore, the biodegradation of bioplastics is a factor that must be studied, because due to the increase in the production of different bioplastics, they may present differences in the decomposition rates. Full article
(This article belongs to the Special Issue Recycling and Recovery of Biomass Materials)
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