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Thermally treated low density polyethylene biodegradation by Penicillium pinophilum and Aspergillus niger
Journal of applied polymer science, 2002-01, Vol.83 (2), p.305-314
Volke-Sepúlveda, T.
Saucedo-Castañeda, G.
Gutiérrez-Rojas, M.
Manzur, A.
Favela-Torres, E.
2002
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Volke-Sepúlveda, T.
Saucedo-Castañeda, G.
Gutiérrez-Rojas, M.
Manzur, A.
Favela-Torres, E.
Titel
Thermally treated low density polyethylene biodegradation by Penicillium pinophilum and Aspergillus niger
Ist Teil von
Journal of applied polymer science, 2002-01, Vol.83 (2), p.305-314
Ort / Verlag
New York: Wiley Periodicals, Inc
Erscheinungsjahr
2002
Quelle
Wiley Online Library Database Model
Beschreibungen/Notizen
Differential scanning calorimetry (DSC), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to determine morphological, structural and surface changes (biodegradation) on thermo‐oxidized (80°C, 15 days) low‐density polyethylene (TO‐LDPE) incubated with Aspergillus niger and Penicillium pinophilum fungi, with and without ethanol as cosubstrate for 31 months. TO‐LDPE mineralization by fungi was also evaluated. Significantly morphological and structural final changes on biologically treated TO‐LDPE samples were observed. Decreases to three units on crystallinity and crystalline lamellar thickness (0.4–1.8 Å), and increases in small‐crystals content (up to 3.2%) and mean crystallite size (8.4–14 Å) were registered. An oxidation decrease (almost twice) on samples without ethanol with respect to the control was observed, while in those with ethanol it was increased (up to 2.5 times). Double bond index increased more than twice from 21 to 31 months. The higher TO‐LDPE changes and fungi‐LDPE interaction was observed in samples with ethanol, suggesting that ethanol favors the TO‐LDPE biodegradation, at least in case of P. pinophilum, probably by means of a cometabolic process. Mineralization of 0.50 % and 0.57 % for A. niger, and of 0.64 % and 0.37 % for P. pinophilum were obtained, for samples with and without ethanol, respectively. A model to explain morphological and structural changes on biologically treated TO‐LDPE is also proposed. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 305–314, 2002
Sprache
Englisch
Identifikatoren
ISSN: 0021-8995
eISSN: 1097-4628
DOI: 10.1002/app.2245
Titel-ID: cdi_proquest_miscellaneous_21482886
Format
–
Schlagworte
Applied sciences
,
Aspergillus niger
,
Biodegradation
,
Chemical bonds
,
Chemical reactions and properties
,
cometabolism
,
Degradation
,
Differential scanning calorimetry
,
Exact sciences and technology
,
Fourier transform infrared spectroscopy
,
Fungi
,
Organic polymers
,
Penicillium pinophilum
,
Physicochemistry of polymers
,
polyethylene biodegradation
,
Scanning electron microscopy
,
Thermooxidation
,
X ray diffraction analysis
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