A study on the biodegradability of polyethylene terephthalate fiber and diethylene glycol terephthalate

Zhang, Jianfei; Wang, Xiaochun; Gong, Jixian; Gu, Zhengrong

doi:10.1002/app.20556

Cited by 98 publications

(51 citation statements)

References 5 publications

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“…Currently, there are three main methods for plastic waste handling: burying in landfill, incineration and recycling [45]. Each has its own inherent limitations.…”

Section: Plastic Disposal Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

et al. 2012

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Abstract:With increasing global consumption and their natural resistance to degradation, plastic materials and their accumulation in the environment is of increasing concern. This review aims to present a general overview of the current state of knowledge in areas that relate to biodegradation of polymers, especially poly(ethylene terephthalate) (PET). This includes an outline of the problems associated with plastic pollution in the marine environment, a description of the properties, commercial manufacturing and degradability of PET, an overview of the potential for biodegradation of conventional polymers and biodegradable polymers already in production.

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“…Currently, there are three main methods for plastic waste handling: burying in landfill, incineration and recycling [45]. Each has its own inherent limitations.…”

Section: Plastic Disposal Methodsmentioning

confidence: 99%

“…The first drawback associated with disposal of plastic waste is the fact that landfill facilities occupy space that could be utilised for more productive means, such as agriculture [45]. This is compounded by the slow degradability of most plastics, as this means the occupied land is unavailable for long periods of time.…”

Section: Landfillmentioning

confidence: 99%

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

et al. 2012

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“…Generally, PET was incubated in the enzymatic solution at temperatures between 30 to 60°C for a period of time ranging from 3 to 14 days. Residual PET and solution were separated for product characterization [130][131][132][133]. As shown in Table 1, different enzymes such as saccharomonospora viridis cutinase polyesterase, thermobifidia fusca hydrolase, cutinase and lipase were applied for PET degradation.…”

Section: De-polymerization Of Pet Using Enzymesmentioning

confidence: 99%

“…Donelli et al [132] only studied the surface morphology of PET treated with cutinase and did not make a qualitative or quantitative statement of possible reaction products. In contrast, Zhang et al [133] studied the application of lipase as degrading agent for diethylene glycol terephthalate (DGTP) and PET at 30°C and 14 days. They found that lipase is capable of fully converting DGTP to terephthalic acid (TPA), whereas the degradation of PET to TPA was negligible.…”

Section: De-polymerization Of Pet Using Enzymesmentioning

confidence: 99%

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Geyer¹,

Lorenz²,

Kandelbauer³

2016

Express Polym. Lett.

206

120

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Abstract.Recycling of poly(ethylene terephthalate) (PET) is of crucial importance, since worldwide amounts of PETwaste increase rapidly due to its widespread applications. Hence, several methods have been developed, like energetic, material, thermo-mechanical and chemical recycling of PET. Most frequently, PET-waste is incinerated for energy recovery, used as additive in concrete composites or glycolysed to yield mixtures of monomers and undefined oligomers. While energetic and thermo-mechanical recycling entail downcycling of the material, chemical recycling requires considerable amounts of chemicals and demanding processing steps entailing toxic and ecological issues. This review provides a thorough survey of PET-recycling including energetic, material, thermo-mechanical and chemical methods. It focuses on chemical methods describing important reaction parameters and yields of obtained reaction products. While most methods yield monomers, only a few yield undefined low molecular weight oligomers for impaired applications (dispersants or plasticizers). Further, the present work presents an alternative chemical recycling method of PET in comparison to existing chemical methods.

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“…This growth aggravates the challenges of waste plastics disposal, especially in remote areas [3]. Landfill and incineration methods induce several negative environmental issues [4][5][6], and this linear model of resource consumption with a "take-make-dispose" pattern has increasingly significant economic limits [7]. To mitigate the contradiction between the rapid economic growth and the shortage of virgin materials and energy, the circular economy was first proposed in 1998 to build up the circular flow of materials and the use of resources and energy through multiple phases [8,9].…”

Section: Introductionmentioning

confidence: 99%

Energy Payback Time of a Solar Photovoltaic Powered Waste Plastic Recyclebot System

2017

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Abstract:The growth of both plastic consumption and prosumer 3-D printing are driving an interest in producing 3-D printer filaments from waste plastic. This study quantifies the embodied energy of a vertical DC solar photovoltaic (PV) powered recyclebot based on life cycle energy analysis and compares it to horizontal AC recyclebots, conventional recycling, and the production of a virgin 3-D printer filament. The energy payback time (EPBT) is calculated using the embodied energy of the materials making up the recyclebot itself and is found to be about five days for the extrusion of a poly lactic acid (PLA) filament or 2.5 days for the extrusion of an acrylonitrile butadiene styrene (ABS) filament. A mono-crystalline silicon solar PV system is about 2.6 years alone. However, this can be reduced by over 96% if the solar PV system powers the recyclebot to produce a PLA filament from waste plastic (EPBT is only 0.10 year or about a month). Likewise, if an ABS filament is produced from a recyclebot powered by the solar PV system, the energy saved is 90.6-99.9 MJ/kg and 26.33-29.43 kg of the ABS filament needs to be produced in about half a month for the system to pay for itself. The results clearly show that the solar PV system powered recyclebot is already an excellent way to save energy for sustainable development.

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A study on the biodegradability of polyethylene terephthalate fiber and diethylene glycol terephthalate

Cited by 98 publications

References 5 publications

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

Plastic Degradation and Its Environmental Implications with Special Reference to Poly(ethylene terephthalate)

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Energy Payback Time of a Solar Photovoltaic Powered Waste Plastic Recyclebot System

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