Selective degradation of biodegradable blends in simulated laboratory composting

Tabasi, Ramin Yousefzadeh; Ajji, Abdellah

doi:10.1016/j.polymdegradstab.2015.07.020

Cited by 125 publications

(54 citation statements)

References 61 publications

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“…Figure shows images of these samples after simulated soil degradation. In these photomicrographs, it can be observed the formation of fractures in the surface, a specific effect of superficial erosion, defining the beginning of PLA and PBAT degradation . The surface erosion, as reported by Rodriguez et al .…”

Section: Resultssupporting

confidence: 53%

A new approach for flexible PBAT/PLA/CaCO₃ films into agriculture

Rocha

Carvalho

Oliveira

et al. 2018

J of Applied Polymer Sci

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The use of flexible films in agriculture has increased intensely in the last 15 years bringing benefits to producers. However, environmental impacts increased due to their incorrect post‐use disposal which leads the degradable films to emerge as an alternative. The production films of poly(butylene adipate‐co‐terephthalate) and poly(lactic acid) reinforced with calcium carbonate (CaCO3) was studied focusing on producing lower cost materials and flexible films. Four different films (reinforcement compositions) were prepared by melt extrusion with 10 and 20 wt % of CaCO3. Mechanical and thermal properties, crystallinity, water absorption, and soil degradation, were evaluated. The addition of reinforcement leads to improved compatibility between the polymers in the matrix, which usually presented phase segregation. The films showed better mechanical properties with the addition of CaCO3. Highly orientated amorphous structures were obtained leading to low water absorption and low degradation in the simulated soil. This low degradation, suggests that the obtained films would be of interest in flexible mulch films manufacturing, particularly for Muridori plantation system, where long‐term plantations are needed. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46660.

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Section: Resultssupporting

confidence: 53%

A new approach for flexible PBAT/PLA/CaCO₃ films into agriculture

Rocha

Carvalho

Oliveira

et al. 2018

J of Applied Polymer Sci

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“…PBAT degradation rate is much higher than that of PLA. Tabasi et al [55] reported an incubation time of 45 days on PBAT films which is noticeably higher than that of PLA. It is worthy to note that PLA is almost disintegrated at 16 days and all other formulations (uncompatibilized and compatibilized PLA/PBAT blends) degrade at 26 days.…”

Section: Effect Of Compatibilizers On Surface Andmentioning

confidence: 96%

Manufacturing and compatibilization of PLA/PBAT binary blends by cottonseed oil-based derivatives

Carbonell‐Verdu¹,

Ferri²,

Dominici³

et al. 2018

Express Polym. Lett.

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Abstract. This research work aims at the compatibilization of poly(lactic acid)/poly(butylene adipate-co-terephthalate), PLA/PBAT binary blends by using cottonseed oil derivatives, i.e. epoxidized (ECSO) and maleinized (MCSO) cottonseed oil. The potential of these vegetable oil-based compatibilizers are compared versus the effects of a conventional styreneacrylic oligomer. The base PLA/PBAT binary blend composition was 80 wt% PLA/20 wt% PBAT and the amount of compatibilizer was set to 1 and 7.5 wt%. The effects of the different compatibilizers were evaluated on PLA/PBAT films in terms of mechanical and thermal properties as well as blend's morphology by field emission scanning electron microscopy (FESEM). Complementary, biodisintegration tests in controlled compost soil and surface properties were evaluated to assess the effects of the compatibilizers. Addition of 1 wt% ECSO and MCSO led to a remarkable increase in the elongation at break up to values over 100% with regard to neat PLA. Despite this, maximum elongation at break was obtained for the compatibilized PLA/PBAT blend with 7.5 wt% MCSO, reaching values of about 321.2% respect neat PLA keeping mechanical resistant properties, such as Young's modulus and tensile strength, at high levels. Therefore, vegetable oil-derived compatibilizers stand out as environmentally friendly additives for PLA/PBAT binary blends with improved properties.

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“…Referring to aerobic conditions, the cumulative volume of CO 2 produced during composting is used as an index of microbial assimilation and organic fraction mineralization (Balaguer et al, 2015(Balaguer et al, , 2016. CO 2 produced by bioplastics during biodegradation is compared with a blank, composed of mature compost plus a positive material, generally cellulose (Tabasi and Ajji, 2015), for which biodegradability has already been assessed (Sakimoto et al, 2017;Zhao et al, 2016) and assumed to be complete (Zhao et al, 2017). The measurement of CO 2 in gaseous emissions from the process can be carried out with different equipment: the cumulative measurement respirometry (CMR) and the gravimetric measurement respirometry (GMR) (Kijchavengkul and Auras, 2008).…”

Section: Co 2 and Ch 4 Measurementsmentioning

confidence: 99%

Methodologies to assess biodegradation of bioplastics during aerobic composting and anaerobic digestion: A review

2019

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Bioplastics are emerging on the market as sustainable materials which rise to the challenge to improve the lifecycle of plastics from the perspective of the circular economy. The article aims at providing a critical insight of research studies carried out in the last 20 years on the degradation of bioplastics under aerobic composting and anaerobic digestion conditions. It mainly focuses on the various and different methodologies which have been proposed and developed to monitor the process of biodegradation of several bioplastic materials: CO 2 and CH 4 measurements, mass loss and disintegration degree, spectroscopy, visual analysis and scanning electron microscopy. Moreover, across the wide range of studies, the process conditions of the experimental setup, such as temperature, test duration and waste composition, often vary from author to author and in accordance with the international standard followed for the test. The different approaches, in terms of process conditions and monitoring methodologies, are pointed out in the review and highlighted to find significant correlations between the results obtained and the experimental procedures. These observed correlations allow critical considerations to be reached about the efficiency of the methodologies and the influence of the main abiotic factors on the process of biodegradation of bioplastics.

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Selective degradation of biodegradable blends in simulated laboratory composting

Cited by 125 publications

References 61 publications

A new approach for flexible PBAT/PLA/CaCO₃ films into agriculture

A new approach for flexible PBAT/PLA/CaCO₃ films into agriculture

Manufacturing and compatibilization of PLA/PBAT binary blends by cottonseed oil-based derivatives

Methodologies to assess biodegradation of bioplastics during aerobic composting and anaerobic digestion: A review

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Selective degradation of biodegradable blends in simulated laboratory composting

Cited by 125 publications

References 61 publications

A new approach for flexible PBAT/PLA/CaCO3 films into agriculture

A new approach for flexible PBAT/PLA/CaCO3 films into agriculture

Manufacturing and compatibilization of PLA/PBAT binary blends by cottonseed oil-based derivatives

Methodologies to assess biodegradation of bioplastics during aerobic composting and anaerobic digestion: A review

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Product

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A new approach for flexible PBAT/PLA/CaCO₃ films into agriculture

A new approach for flexible PBAT/PLA/CaCO₃ films into agriculture