Počet záznamů: 1
Biodegradation of waste PET based copolyesters in thermophilic anaerobic sludge
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SYSNO ASEP 0443376 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Biodegradation of waste PET based copolyesters in thermophilic anaerobic sludge Tvůrce(i) Hermanová, S. (CZ)
Šmejkalová, P. (CZ)
Merna, J. (CZ)
Zarevúcka, Marie (UOCHB-X) RIDCelkový počet autorů 4 Zdroj.dok. Polymer Degradation and Stability. - : Elsevier - ISSN 0141-3910
Roč. 111, Jan (2015), s. 176-184Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova poly(ethylene terephthalate) ; copolymers ; sludge ; biodegradation ; hydrolysis ; waste Vědní obor RIV EI - Biotechnologie a bionika Institucionální podpora UOCHB-X - RVO:61388963 UT WOS 000348949000021 EID SCOPUS 84917742226 DOI 10.1016/j.polymdegradstab.2014.11.007 Anotace A series of poly(ethylene terephthalate-co-lactate) copolyesters with random microstructure was prepared from PET waste beverage bottles and L-lactic acid. Square specimens, sectioned from melt-pressed film, were incubated in thermophilic sludge (55 degrees C, alkaline environment) for 394 days. The biodegradability of the samples, determined from biogas yield, reached 34-69 % depending on the starting aromatic to aliphatic units' ratio. Water uptake study in sludge and abiotic buffers at 55 degrees C showed sharp border around 57% of aromatic units in copolyester composition between polymers susceptible and resistant to both hydrolytic attack by hydrolases and the abiotic hydrolysis. Samples biodegraded in sludge and those abiotically aged in buffers were characterized by H-1 NMR, ATR-FTIR, SEC, DSC, and TGA analysis to gain an insight into the chain scission mechanism. Aromatic oligomers as model of copolyester degradation intermediates were prepared and proved to biodegrade in sludge as well. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Rok sběru 2016
Počet záznamů: 1