Biodegradation Study by Pseudomonas sp. of Flexible Polyurethane Foams Derived From Castor Oil

Authors
Spontón, Marisa Elisabet; Casis, Natalia; Mazo, Paula; Raúd, Brenda; Simonetta, Arturo; Rios, Luis; Estenoz, Diana Alejandra
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
The synthesis and biodegradation of polyurethane foams obtained from environmentally benign processeswere studied.Flexible polyurethane foams based on castor oil modified with maleic anhydride (MACO) were synthesized.The synthesis involved a single-stage process by mixing castor oil/MACO (weight ratios 75:25and 25:75) and 2-4 toluene diisocyanate (TDI) in stoichiometric amount of OH:NCO. The biodegradabilitystudies with cultures of a Pseudomonas sp. strain (DBFIQ-P36) involved incubation periods of 2 months at37 C. Polymers were characterized before and after biodegradation by Fourier Transform InfraredSpectroscopy (FT-IR), INSTRON mechanical tester, and Scanning Electron Microscopy (SEM). The resultsshowed that the addition of MACO produces a considerable increase in the rate of degradation and animportant change in the chemical and morphological structures. This is due to the presence of estergroups that are vulnerable to chemical hydrolysis and enzymatic attack. The eco-toxicity after thebiodegradation was evaluated. Toxic compounds such as primary amines were identified by Gas ChromatographyeMassSpectrometry (GCeMS) in combination with Nuclear Magnetic Resonance (NMR) asdegradation products.
Fil: Spontón, Marisa Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Casis, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Mazo, Paula. Universidad de Antioquía; Colombia
Fil: Raúd, Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Fil: Simonetta, Arturo. Universidad Nacional del Litoral. Facultad de Ingeniería Química; Argentina
Fil: Rios, Luis. Universidad de Antioquia; Colombia
Fil: Estenoz, Diana Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico Para la Industria Química (i); Argentina
Subject
POLIURETANOS
BIODEGRADACIÓN
Ingeniería de los Materiales
Ingeniería de los Materiales
INGENIERÍAS Y TECNOLOGÍAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/8676