Bio Polymers from Renewable Resources - Natural (Green) Polymers:
Bio Polymers derived from renewable agricultural resources are competing with synthetic
polymers, due to increasing oil prices and limitation in fossil-based raw materials. Further,
biopolymers are biodegradable under the right condition and the environment.
Until recently, the applications of biodegradable polymers were
limited to biomedical applications including resorbable surgical
sutures, implants and controlled drug delivery systems.
Currently, these renewable agricultural resource derived
biopolymers are receiving attention in replacing conventional
polymers used in packaging, paper coating, disposable cutlery
products, fibers and films.
Cellulose is a carbohydrate naturally made by linking of thousands
of simple sugar units. It's the main building block of plants, and
comes to us as a ready-made renewable resource natural high
Polylactide is a commercially available biodegradable
environmentally friendly biopolymer. Its raw material stems mainly
from corn starch. Fermentation of corn starch using microorganisms
yield lactic acid. Further reactions of lactic acid molecules link
together to yield a ring shaped molecule called lactide.
The process of polymerization includes opening of these lactide
rings and linking tens and thousands of units together to form
polylactide (PLA) polymer. The articles made from PLA are
compostable under the right condition after their useful life time.
Biodegradation of PLA-derived products yields CO2 and water
completing the cycle. more..
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