PET depolymerisation in supercritical ethanol catalysed by [Bmim][BF<sub>4</sub>]

Nunes, Cátia S.; Silva, Michael Jackson Vieira da; Silva, Danielle Cristina da; Freitas, Adonilson dos Reis; Rosa, Fernanda A.; Rubira, Adley F.; Muniz, Edvani C.

doi:10.1039/c4ra00262h

Cited by 44 publications

(51 citation statements)

References 36 publications

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“…The proposed mechanism for transesterification reaction products of waste cooking soybean oil, in acidic environment, as investigated in the present work, is shown in Scheme 3 based in a paper published by Nunes et al [43].…”

Section: [Hmim][hso 4 ]mentioning

confidence: 95%

“…Moreover, they can be reused without significant loss in catalyst activity [55]. showed significant activity during chemical depolymerisation by scEtOH [43].…”

Section: Activity Of [Hmim][hso 4 ] During Transesterificationmentioning

confidence: 99%

“…Transesterification process was performed according to the methodology described by Nunes et al [43] for PET depolymerization and using the same apparatus. Reaction was carried out in a 0.1 L home-made batch-type reactor made of 316 ® stainless steel, Scheme 2.…”

Section: Transesterification Of Soybean Waste Oil Under Scetoh Catalymentioning

confidence: 99%

“…DegirScheme 3. Proposed mechanism for the transesterification under scEtOH in the presence of the IL [HMim][HSO4], based on work of Nunes et al[43].…”

mentioning

confidence: 99%

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Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Caldas

Nunes

Souza

et al. 2016

Applied Catalysis B: Environmental

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Section: [Hmim][hso 4 ]mentioning

confidence: 95%

“…Moreover, they can be reused without significant loss in catalyst activity [55]. showed significant activity during chemical depolymerisation by scEtOH [43].…”

Section: Activity Of [Hmim][hso 4 ] During Transesterificationmentioning

confidence: 99%

Section: Transesterification Of Soybean Waste Oil Under Scetoh Catalymentioning

confidence: 99%

“…DegirScheme 3. Proposed mechanism for the transesterification under scEtOH in the presence of the IL [HMim][HSO4], based on work of Nunes et al[43].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Caldas

Nunes

Souza

et al. 2016

Applied Catalysis B: Environmental

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“…These oligomers can be used as chain extenders in syntheses to produce new materials with interesting tuned properties . In recent research, various operating conditions during PET glycolysis have been studied, such as the use of sub‐ and supercritical systems, microwaves, new catalysts and different reaction temperatures …”

Section: Introductionmentioning

confidence: 99%

Oligomer production through glycolysis of poly(ethylene terephthalate): effects of temperature and water content on reaction extent

Stoski

Viante

Nunes

et al. 2016

Polymer International

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Using ethylene glycol (EG) and post-consumer poly(ethylene terephthalate) (PET) bottles, monomers and oligomers were obtained through glycolysis catalyzed by zinc acetate. Three reaction temperatures (150, 160 and 170 ∘ C) and water contents (0, 1.0 and 2.0% with respect to the volume of EG) were used as inputs; the extent of depolymerization as the analyzed response formed the basis for a factorial design experiment. The products obtained from PET glycolysis were analyzed using high-performance liquid chromatography and Fourier transform infrared spectroscopy, and their morphology was evaluated using scanning electron microscopy. The results showed the presence of terephthalic acid, hydroxylated tetramers, bis(hydroxyethyl) terephthalate monomer and dimer, and also oligomers with various molecular weights, water being present in the reaction medium. Statistical analysis (95% confidence) indicated that temperature and water content were significant inputs for glycolysis of PET, with the temperature being much the more important factor.

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Visibly Transparent and Infrared Reflective Coatings for Personal Thermal Management and Thermal Camouflage

Woo

Zhou

Kim

et al. 2022

Adv Funct Materials

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Tailoring thermal radiation using low‐infrared‐emissivity materials has drawn significant attention for diverse applications, such as passive radiative heating and thermal camouflage. However, the previously reported low‐infrared‐emissivity materials have the bottleneck of lacking independent control over visible optical properties. Here, a novel visibly transparent and infrared reflective (VTIR) coating by exploiting a nano‐mesh patterning strategy with an oxide–metal–oxide tri‐layer structure is reported. The VTIR coating shows simultaneously high transmittance in the visible region (>80% at 550 nm) and low emissivity in the mid‐infrared region (< 20% in 7–14 µm). The VTIR coating not only achieves a radiative heating effect of 6.6 °C for indoor conditions but also enables a synergetic effect with photothermal materials to keep human body warm at freezing temperatures for outdoor conditions, which is 10–15 °C warmer than normal cotton and Mylar film. Moreover, it demonstrates an excellent thermal camouflage effect at various temperatures (34–250 °C) and good compatibility with visible camouflage on the same object, making it ideal for both daytime and nighttime cloaking. With its unique and versatile spectral features, this novel VTIR design has great potential to make a significant impact on personal heat management and counter‐surveillance applications.

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PET depolymerisation in supercritical ethanol catalysed by [Bmim][BF₄]

Abstract: Poly(ethylene terephthalate) was depolymerised under supercritical ethanol, 98 wt% of diethylterephthalate was obtained after 45 min, by adding [Bmim][BF4] as catalyst.

Cited by 44 publications

References 36 publications

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Oligomer production through glycolysis of poly(ethylene terephthalate): effects of temperature and water content on reaction extent

Visibly Transparent and Infrared Reflective Coatings for Personal Thermal Management and Thermal Camouflage

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PET depolymerisation in supercritical ethanol catalysed by [Bmim][BF4]

Abstract: Poly(ethylene terephthalate) was depolymerised under supercritical ethanol, 98 wt% of diethylterephthalate was obtained after 45 min, by adding [Bmim][BF4] as catalyst.

Cited by 44 publications

References 36 publications

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Supercritical ethanolysis for biodiesel production from edible oil waste using ionic liquid [HMim][HSO4] as catalyst

Oligomer production through glycolysis of poly(ethylene terephthalate): effects of temperature and water content on reaction extent

Visibly Transparent and Infrared Reflective Coatings for Personal Thermal Management and Thermal Camouflage

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PET depolymerisation in supercritical ethanol catalysed by [Bmim][BF₄]