The enhancement mechanism of flowability and modulus of PET/TFP‐glass composites

Zhang, Tianci; Liu, Shuai; Li, Huan; Wu, Hong; Guo, Shaoyun

doi:10.1002/pc.25042

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…FAST-PETase has the lowest melting temperature (63.3 °C), followed by PES-H1 L92F/Q94Y (77.6 °C), HotPETase (80.5 °C), and LCC ICCG (91.7 °C). As mentioned above, it is very important to perform PET depolymerization at a high temperature, close to the T g of PET which is near 70 °C – in aqueous solution. Enzymes’ performances were evaluated at low (nonsaturating) enzyme concentration (0.2 mg enzyme g PET –1 ) using 2 g PET L –1 and at five temperatures to match the optimal temperature range reported in the literature for each enzyme (e.g., 45, 50, 60, 65, and 68 °C).…”

Section: Resultsmentioning

confidence: 99%

Assessment of Four Engineered PET Degrading Enzymes Considering Large-Scale Industrial Applications

Arnal,

Anglade,

Gavalda

et al. 2023

ACS Catal.

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In recent years, enzymatic recycling of the widely used polyester polyethylene terephthalate (PET) has become a complementary solution to current thermomechanical recycling for colored, opaque, and mixed PET. A large set of promising hydrolases that depolymerize PET have been found and enhanced by worldwide initiatives using various methods of protein engineering. Despite the achievements made in these works, it remains difficult to compare enzymes' performance and their applicability to large-scale reactions due to a lack of homogeneity between the experimental protocols used. Here, we pave the way for a standardized enzymatic PET hydrolysis protocol using reaction conditions relevant for larger scale hydrolysis and apply these parameters to four recently reported PET hydrolases (LCC ICCG , FAST-PETase, HotPETase, and PES-H1 L92F/Q94Y ). We show that FAST-PETase and HotPETase have intrinsic limitations that may not permit their application on larger reaction scales, mainly due to their relatively low depolymerization rates. With 80% PET depolymerization, PES-H1 L92F/Q94Y may be a suitable candidate for industrial reaction scales upon further rounds of enzyme evolution. LCC ICCG outperforms the other enzymes, converting 98% of PET into the monomeric products terephthalic acid (TPA) and ethylene glycol (EG) in 24 h. In addition, we optimized the reaction conditions of LCC ICCG toward economic viability, reducing the required amount of enzyme by a factor of 3 and the temperature of the reaction from 72 to 68 °C. We anticipate our findings to advance enzymatic PET hydrolysis toward a coherent assessment of the enzymes and materialize feasibility at larger reaction scales.

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Section: Resultsmentioning

confidence: 99%

Assessment of Four Engineered PET Degrading Enzymes Considering Large-Scale Industrial Applications

Arnal,

Anglade,

Gavalda

et al. 2023

ACS Catal.

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“…These nanocomposites consist of high dielectric ceramic nanoparticles embedded in a dielectric polymer (such as poly(methyl methacrylate) (PMMA), epoxy resin, polyvinylidene difluoride (PVDF), polypropylene (PP), etc.) 10–14 . Plethora of research investigations have been done to synthesize polymer ceramic nanocomposites with high discharge energy density (U D ) and high breakdown strength (BDS) 15–17 .…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

Jaidka,

Singh

2023

Polymer Composites

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Poly(vinylidene)fluoride‐Ba0.8Sr0.2TiO3 (PVDF‐BST) trilayered nanocomposites (with different vol% loading of BST nanoparticles, i.e. 0.75%, 1.50%, 2.25% and 3.00%) has been processed by the tape casting technique. The upper and lower layers of the nanocomposites are casted in the same direction, whereas the middle layer is casted in the opposite direction. The trilayered PVDF‐BST nanocomposite consisting of 3.00 vol% of BST nanoparticles exhibited high dielectric permittivity (~25), low tangent loss (~0.03) and moderately high breakdown strength (BDS ~282 MV/m). Moreover, it also possesses a high discharge energy density (~7.8 J/cc at 1400 kV/cm) and efficiency (~93%). A mechanism for the excellent energy storage behavior and dielectric properties has been proposed. Where, moderately high BDS and low tangent loss are associated with the spatial distribution of the local electric field at interlayer interfaces of PVDF‐BST trilayered nanocomposites, which restricts the conduction of charge carriers at high electric field. The ultrahigh efficiency and enhanced discharge energy density is attributed to the formation of interfacial dipoles at various interfaces such as interlayer, intralayer (PVDF/PVDF), and PVDF/BST interfaces. These investigations would be adopted as a futuristic strategy for developing excellently efficient polymer‐ceramic nanocomposites for the high energy density capacitors used in pulsed power applications.Highlights PVDF‐BST trilayered nanocomposites exhibit high ε′ ~25 and low tanδ ~0.03. Nanocomposite shows ultra‐high energy efficiency ~93% and enhanced UD ~ 7.8 J/cc. Mechanism for the excellent energy storage and dielectric properties Relies on the interfacial dipoles and distribution of the local electric field.

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The enhancement mechanism of flowability and modulus of PET/TFP‐glass composites

Cited by 2 publications

References 27 publications

Assessment of Four Engineered PET Degrading Enzymes Considering Large-Scale Industrial Applications

Assessment of Four Engineered PET Degrading Enzymes Considering Large-Scale Industrial Applications

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites

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The enhancement mechanism of flowability and modulus of PET/TFP‐glass composites

Cited by 2 publications

References 27 publications

Assessment of Four Engineered PET Degrading Enzymes Considering Large-Scale Industrial Applications

Assessment of Four Engineered PET Degrading Enzymes Considering Large-Scale Industrial Applications

Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba0.8Sr0.2TiO3 nanocomposites

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Ultrahigh efficiency and enhanced discharge energy density at low loading of nanofiller in trilayered polyvinylidene fluoride‐Ba_0.8Sr_0.2TiO₃ nanocomposites