Preparation of poly(L-lactide) blends and biodegradation by Lentzea waywayandensis

As a biodegradable polyester, polylactide (PLA) has applications as a packaging material, in biomedical fields and tissue engineering. With the dual aim of improving its properties and biodegradability, PLA was blended with other polymers such as gum arabic, thermoplastic starch, microcrystalline ce...

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Bibliographic Details
Published in:Biotechnology letters 2012-11, Vol.34 (11), p.2031-2035
Main Authors: Nair, Nimisha R, Nampoothiri, K. Madhavan, Pandey, Ashok
Format: Article
Language:English
Subjects:
Actinomycetales - metabolism
Applied Microbiology
Biochemistry
Biodegradability
Biodegradation
Biodegradation, Environmental
Biological and medical sciences
Biomedical and Life Sciences
Bioplastics
Biotechnology
Blends
Cellulose
Cellulose - chemistry
Fundamental and applied biological sciences. Psychology
Gravimetric analysis
gum arabic
Gum Arabic - chemistry
Hydrogen-Ion Concentration
Lactic Acid - metabolism
Lentzea waywayandensis
Life Sciences
Microbiology
Microscopy, Electron, Scanning
Original Research Paper
Packaging materials
Polyesters
Polyesters - chemistry
Polyesters - metabolism
Polyethylene glycol
Polyethylene Glycols - chemistry
polylactic acid
Polymer blends
Polymers
Starch
Starches
Thermal properties
Thermogravimetry
tissue engineering
weight loss
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Summary:As a biodegradable polyester, polylactide (PLA) has applications as a packaging material, in biomedical fields and tissue engineering. With the dual aim of improving its properties and biodegradability, PLA was blended with other polymers such as gum arabic, thermoplastic starch, microcrystalline cellulose, polyethylene glycol and polyhydroxy butyrate in 1:1 (w/w) by melt-blending technique. The thermal properties of the blends were compared with that of unblended PLA by thermo-gravimetric analysis. Biodegradation using Lentzea waywayandensis was in the order of PLA–gum arabic > PLA–thermoplastic starch > PLA(virgin) > PLA–microcrystalline cellulose > PLA–polyethylene glycol > PLA–polyhydroxy butyrate. Weight loss of 99 % (w/w) was noted within 4 days for PLA–thermoplastic starch and PLA-gum arabic blends.
ISSN:0141-5492
1573-6776
DOI:10.1007/s10529-012-1005-5