Biodegradation of Poly(ε-caprolactone) (PCL) Film by <Emphasis Type="Italic">Alcaligenes faecalis</Emphasis> |
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Authors: | Vinay K Khatiwala Nilanshu Shekhar Saroj Aggarwal U K Mandal |
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Institution: | (1) University School of Chemical Technology, GGS Indraprastha University, Delhi, 110006, India;(2) University School of Biotechnology, GGS Indraprastha University, Delhi, 110006, India;(3) University School of Basic and Applied Sciences, GGS Indraprastha University, Delhi, 110006, India |
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Abstract: | The biodegradation behavior of PCL film with high molecular weight (80,000 Da) in presence of bacterium Alcaligenes faecalis and the analysis of degraded polymer film have been carried out. Thin Films of PCL were prepared by means of solution casting
method and the bacterial degradation behavior was carried in basal medium, in presence of bacteria with time variation after
UV treatment. It was observed that after UV treatment the degradation of polymer film was increased and the degradation rate
followed a three steps degradation mechanism. The degraded polymer film was analyzed by means of Differential Scanning Calorimeter
(DSC), Thermo Gravimetric Analyzer (TGA) and Fourier Transform Infrared Spectroscope (FTIR). DSC results revealed that at
the initial stages of the degradation up to 15–20 days, the bacterium preferentially degrades the amorphous parts of the polymer
film over the crystalline zone. Thermo gravimetric analysis highlighted the low temperature stability of degraded films with
extent of degradation. FTIR results showed the chain scission mechanism of the polymer chains and also supported the preferential
degradation of amorphous phase over crystalline phase in the initial stages of the degradation. |
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Keywords: | Poly(ε -caprolactone) Biodegradation Thermal analysis FTIR |
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