Maghemite/nitrogen-doped graphene hybrid material as a reusable bifunctional catalyst for glycolysis of polyethylene terephthalate

Nabid, Mohammad Reza; Bide, Yasamin; Fereidouni, Nazanin; Etemadi, Bahare

doi:10.1016/j.polymdegradstab.2017.08.033

Cited by 36 publications

(20 citation statements)

References 36 publications

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“…Considering that wearable electronics require excellent durability and fabric‐like wearable comfort, fabrics would be a normal choice for being used as substrates . Among all kinds of commercial fabrics, poly(ethylene terephthalate (PET) is commonly used in clothing because of its economic value, chemical resistance, shrinkage resistance, good strength, consistency in quality, and ready availability . In order to improve the conductivity of nonconductive fiber substrate, carbon nanotubes (CNTs), graphene, and gold were usually coated on it.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors

Zhou

Jiao

et al. 2018

J of Applied Polymer Sci

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Fiber-shaped supercapacitors have drawn much attention for their great potential application in future portable and wearable electronics because of their outstanding flexibility, tiny volume, and good deformability. In this work, commercial poly(ethylene terephthalate) (PET) thread was successfully converted into an electrically conductive and electrochemically active thread by introducing copper sulfide (CuS) and polyaniline (PANI) via simple chemical bath deposition and electrochemical deposition. The obtained PANI/CuS/PET electrode combined all the advantages of PET, CuS, and PANI, showing an excellent physical and electrochemical performance. The fiber-shaped supercapacitor exhibits a high specific capacitance of 29 mF cm −2 (116 mF cm −2 for a single electrode) and good cycling stability with 93.1% retention after 1000 cycles. With the simple preparation method and low-cost raw materials, this strategy provides a reference for the fabrication of portable/wearable energy storage devices.

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Section: Introductionmentioning

confidence: 99%

Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors

Zhou

Jiao

et al. 2018

J of Applied Polymer Sci

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“…To introduce a bifunctional catalyst for glycolysis of PET, Nabid et al 154 synthesized γ‐Fe 2 O 3 /N‐doped graphene where γ‐Fe 2 O 3 and N‐doped graphene were imparted as acidic sites and basic sites, respectively. Having performed catalytic depolymerization at a short reaction time with a small quantity of catalyst under quite mild conditions, the BHET yield of 100% was achieved.…”

Section: Chemical Recycling Of Petmentioning

confidence: 99%

Chemical recycling ofPET: A stepping‐stone toward sustainability

Shojaei

Abtahi

Najafi

2020

Polymers for Advanced Techs

168

113

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This paper focuses explicitly on the chemical approaches involved in the recycling of polyethylene terephthalate (PET). Due to the high rate of consumption as well as nonbiodegradability, PET plays a crucial role as one of the most significant sources of accumulated waste in the landfill which jeopardizes our planet. To address this issue as well as increased environmentally conscious, running out of landfill space, natural resource, and energy conservation, and producing value-added chemicals to use as building block or co-products, the chemical recycling methods have been evolved. Therefore, there has been an attempt to have a comprehensive review of the five types of conventional recycling methods namely hydrolysis, methanolysis, glycolysis, aminolysis, and ammonolysis studied by researchers over the last two decades. In this regard, the influence of diverse depolymerization reaction variables for instance, traditional catalyst, temperature profile, ionic liquid catalysts, phase transfer catalyst, microwave assistance, etc was reported. Moreover, the upsides and downsides of each technique were considered.

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“…Renewable heterogenous catalyst can be easily removed from the reaction mixture, they have a high catalytic activity that easily rival and could exceed traditional transesterification catalysts, such as metal salts. [2,4,[8][9][10]15] The use of Fe 3 O 4 and Fe 2 O 3 particle based catalyst reached over 90% selective BHET yields even after several uses. [8,15] The increasing efficiency of these processes maintains, or rather furthers the sustainability of plastics.…”

Section: Introductionmentioning

confidence: 99%

“…The glycolysis of poly(ethylene-terephthalate) (PET) has been the focus of numerous researches for the past 40 years. A wide range of studies have been made to optimize this reaction and gain yields as high as possible of bis(2hydroxyethyl)-terephthalate (BHET) or other terephthalicacid derivate diesters [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. This technique allowed the recycling of PET waste that could not be further used and recycled by mechanical techniques like extrusion or injection moulding [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Depolymerization and Polycondensation of PET Based Random Oligo- and Polyesters

et al. 2019

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The glycolysis of PET is a promising well-developed technique that could be utilized in a wide range of processes. Due to its equilibrial nature, the high ratio of reagents and the purification steps it is an expensive process. In this study our goal was to modify the standard glycolysis to an easily modulateable method (acido-alcoholysis) suited for one-pot oligoester, polyester synthesis. Adipic acid was added to the depolymerization reaction to connect low molecular weighed components into oligoesters. PET depolymerization reaction series were carried out with ethylene-glycol/adipic acid and butane-1,4-diol/ adipic acid to demonstrate the tuneability of these systems. The reaction products were thoroughly characterized with NMR, FTIR, TGA, DSC and functional group analysis. One-pot depolymerization-polycondensation reactions were engineered to produce unsaturated and saturated polyesters. The unsaturated polyesters were dissolved in styrene, cross-linked and moulded to be characterized with DMA. A decreasing tendency of the glass transition temperature and cross-link density were found in the function of the ratio of adipic acid used during the depolymerization step. Acido-alcoholysis proved to be a versatile technique that could be used to engineer oligoesters and polyesters. The reagent use can be minimalized, and the raw reaction products can be directly applied as mid-products.

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Maghemite/nitrogen-doped graphene hybrid material as a reusable bifunctional catalyst for glycolysis of polyethylene terephthalate

Cited by 36 publications

References 36 publications

Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors

Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors

Chemical recycling ofPET: A stepping‐stone toward sustainability

One-Pot Depolymerization and Polycondensation of PET Based Random Oligo- and Polyesters

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