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We developed our suggested method, which included phosphate buffer and Fe 3 as the stabilizer to increase the potency of potassium ferrate, and then developed a purified FDCA under mild conditions. The experimental results showed that the furan-aromatic polyesters made from biomass-based HMF are viable alternatives to the petrochemical benzene-aromatic polyesters, as low-melting heat bondable fiber, high gas-barrier packaging material, and engineering specialty material.
Source link: https://doi.org/10.3390/polym11020197
paralysis by cutinase 1 from Thermobifida cellulosilytica investigated, a series of copolyesters based on furanic acid and sulfonated isophthalic acid with various polyols were synthetized and their susceptibility to enzymatic hydrolysis. The hydrolytic stability of the alkyl diol unit soared with increasing chain length, while ether diol units's average was higher. After 72 h of incubation at 50 °C, the Thc_Cut1 was able to hydrolyze all of the copolyesters containing alkyl diols, ranging from two to eight carbon chain lengths, but the highest operations were detected for the shorter chain lengths with a value of 13. 6 0. 7 mM FDCA released after 72 h of incubation at 50 °C. When converting an alkyl diol by ether diols, a fivefold higher amount of FDCA for triethylene glycol was found relative to 1,8-octanediol.
Source link: https://doi.org/10.3390/polym9090403
Following the melt polycondensation process, Intending to extend the thermo-physical characteristics of bio-based polymers, furan-based thermoplastic polyesters were synthesized. In the DSC heating traces for the melt quenched samples, PEF blends exhibit in general dual glass transitions. In PLM, the only PPF−PEF blends show a single glass transition and a single melt phase. In PLM, PBF produces miscible blends with PCHDMF and PPF, although most other blends display dual glass transitions in DSC and phase separation.
Source link: https://doi.org/10.3390/polym12010225
Biomass can be used as an alternative feedstock for the production of fuels and valuable chemicals, which could reduce the current global dependence on fossil energy. Consequently, substantial attempts have been made for effective production of FDCA and the catalytic chemical approach to FDCA production, mainly from 5-hydroxymethylfurfural, a biomass-derived platform molecule that has attracted significant research attention. We provide a systematic and critical analysis of recent progress in the conversion of HMF to FDCA with various metal-based catalysts. To learn the specifics of this reaction, catalytic behavior and reaction mechanisms are described and discussed. Finally, conclusions are published, and suggestions related to further development of the catalysts are also included for the production of FDCA on a large scale in an economical and environmentally friendly manner.
Source link: https://doi.org/10.3390/catal10010120
Enzymatic oxidation of 5-hydroxymethylfurfural and its oxidized derivatives was investigated using three fungal enzymes: wild-type aryl alcohol oxidase from three fungal species, wild-type peroxygenase from Agrocybe aegerita, and recombinant galactose oxidase. For various enzyme-substrate ratios and enzyme mixtures, pH's effect on different reaction steps was determined, and apparent kinetic results were calculated for different enzyme-substrate ratios and enzyme combinations.
Source link: https://doi.org/10.3390/microorganisms6010005
According to HMF, where LPO and HRP produced 0. 6 and 0. 7% of HMFA, and GO and AO produced 25. 5 and 5. 1% DFF, respectively, with GO, HRP, and LPO all playing against HMF, where LPO, GO, HRP, and LPO were among the many players active against HMF, where HMFA produced 0. 6 and 0. 7 percent of HMFA, where AO, GO, HRP, and LPO, AO, With only AO having a marginally higher response against FFA, HMFA, and FFA, only AO had marginal or no activity against DFF, HMFA, and FFA, with only AO showing marginally higher activity against FFA with a yield of 11. 6%. The effect of substrate concentration was only assessed in AO, where 20 mM HMF gave 19. 5% DFF and 5 mM HMF in 39. 9% DFF, with a K m value of 14 mM. Conclusions Our research sought to discover how bio-based HMF is converted to FDCA by different enzymes, and the combination of AO and CAT was the most efficient in turning over 97% HMF to DFF in 72 hrs.
Source link: https://doi.org/10.1186/s13068-020-01705-z
Abstract Background 2,5-Furandicarboxylic acid is a renewable building block for the production of polyfurandicarboxylates, which are biodegradable polyesters that are supposed to substitute classical polyesters made from fossil resources. 5-Methoxymethylfurfural, which is produced in the presence of methanol, produces less by-products and has higher storage stability than 5-hydroxymethylfurfural being, making it the preferred industrial substrate of choice. Methanol oxidase reacts best with the methanol made for in situ production of H2O2 that, along with that produced by aryl-alcohol oxidase, fuels the peroxygenase reactions. Conclusions The synergistic reaction of aryl-alcohol oxidase and unspecific peroxygenase in the presence of 5-methoxymethylfurfural and O2 is sufficient for the production of 2,5-furandicarboxylic acid. The addition of methanol oxidase to the enzymatic cascade boosts the 2,5-furandicarboxylic acid yields by oxidizing a reaction by-product to fuel the peroxidase reactions.
Source link: https://doi.org/10.1186/s13068-018-1091-2
Since of its chemical properties, 2,5-furandicarboxylic acid, a platform chemical, has gained a lot of attention in recent years, as it can be used to produce green polymers such as polyethylene 2,5-furandicarboxylate, an alternative to polyethylene terephthalate obtained from fossil fuels. However, researchers are investigating the direct conversion of carbohydrates and biomass using both a single- and multi-phase approaches for FDCA production, due to the poor availability of HMF and high processing cost to convert HMF to FDCA. To solve these issues, as well as FDCA's purification, much attention is now being paid to produce FDCA derivatives such as 2, 5-furandicarboxylic acid dimethyl ester.
Source link: https://doi.org/10.3389/fchem.2020.00659
Poly, and poly ether are among the 2,5-tetramethyl-1,3-cyclobutanediol derivatives that can be synthesized and modified with 2,2,4,4-tetramethyl-1,3-cyclobutanediol based polyesters derived from 2,5-furandicarboxylic acid, poly, and poly. From 55. 5 °C for PPF to 91. 1 °C for PETF-18, and from 39. 0 °C to 43. 5 °C for PBTF-18, the glass transition temperature was increased from 87 °C for PEF to 91. 1 °C for PETF-18. Although the PEF/PPF/PBF's O2 and CO2 barrier of PEF/PPF/PBF was reduced by the addition of CBDO units, the upgraded copolyesters still had good barrier properties, according to a barrier properties analysis.
Source link: https://doi.org/10.3390/polym9090305
2-Furandicarboxylic acid, a common bio-monomer that may be able to convert degradable polyesters from terephthalic acid. Efficient selective oxidation of biomass-based 5-hydroxymethylfurfural to FDCA has been a significant but challenging task over the past decade. Under the ideal conditions of tert-butyl hydroperoxide as the oxidant, a high FDCA selectivity of 94. 5 and 98. 2% conversion of HMF was achieved. The estimated apparent activation energies of HMF oxidation were obtained after fitting experimental results with the first-order kinetics equation.
Source link: https://doi.org/10.3389/fchem.2022.853112
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