Transcript Inspiration Rain - Hillwoods Academy

BIO Plastic.. an alternative
to current plastic….
It’s a nascent initiative to create a world
which will be eco friendly………
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GO GREEN !!
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What are BIOPLASTICS ?
• BIOPLASTICS or
organic plastics are a
form of plastics derived
from renewable biomass sources, such as
vegetable oil, corn starch, pea starch, or
Microbiota, rather than fossil-fuel plastics which
are derived from petroleum.
• Biodegradable plastics combine the utility of
plastics (lightweight, resistance, relative low
cost) with the ability to completely and fully
biodegrade.
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Types of bio plastics
The different types of bio plastics include –
• Starch Based Plastics
• Polyhydroalkanoates
( PHA’s )
• Poly-3-hydrobutyrate
( PHB’s )
• Polylactic Acid ( PLA)
• Oxo - Biodegradable Plastics
• Genetically Modified Plastics
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Starch based
BIOPLASTICS
• Among the different types of
biodegradable plastics, Starch based
plastics constitute about 50% of the
bioplastics market. Thermoplastic
starch, such as Plastarch Material,
currently
represents
the
most
important and widely used bioplastic.
• Flexibiliser and plasticizer such as
sorbitol and glycerin are added to the
starch. By varying the amounts of
these additives, the characteristic of
the material can be tailored to specific
needs (also called "thermo-plastical
starch").
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Ingredients
Here, the main ingredients used are -
CORNFLOUR,
WATER ,
GLYCERIN, and
VINEGAR
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Chemistry Inside
• Corn flour contains STARCH,
which is the main ingredient
of the Bioplastic.
• Basically, Starch is made of long chains of
glucose molecules joined together.
• Strictly, it contains two polymers:
AMYLOSE and AMYLOPECTIN
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Polymers in Starch
• AMYLOSE
This is a long straight-chained
polymer. This is a very useful
polymer as it would give strength
to the plastic.
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Polymers in Starch
• AMYLOPECTIN
This is branched. When starch is dried
from an
aqueous solution it forms a film due to hydrogen
bonding between the chains. However, the
AMYLOPECTIN inhibits the formation of the film,
as it makes the plastic brittle. Reacting the starch
with a chemical like vinegar breaks down the
amylopectin, giving strenght to our plastic.
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Process of making
Bioplastic
GREENER EARTH
CORNFLOUR
• 1 tablespoon
BIODEGRADABLE
PLASTIC
WATER
GLYCERIN
• 1 tablespoon
• ½ tablespoon
VINEGAR
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Giving different
properties
Varying the quantity of vinegar accordingly can
give different properties to the plastic
• if less amount of vinegar is used,
then the plastic obtained would
be hard and stiff.
• if more amount of vinegar is
used, then the plastic obtained
would be tensile and flexible.
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applications
• Biodegradable bioplastics are
widely used for disposable
items, such as packaging and
catering items.
• Biodegradable plastics are also
used for organic waste bags,
where they can be composted
together with the food or
green waste.
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Benefits
Bioplastics can ensure a greener and sustainable
future as it • Takes Less Time to Break Down
Bioplastic, easily degrades when
discarded, thus reducing tons of
petroplastic that cannot degrade.
• Renewable
The biggest advantage of bioplastic is that these
plastics are made from renewable sources. Unlike
fossil fuels including oil, these resources will not
be depleted within a century.
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Benefits
• Non Toxic
Bioplastics do not have any
chemicals or toxins. This plastic
harmlessly breaks down and
gets absorbed into the earth.
• Reduces CO2 Emissions
When bioplastics degrade, there are very few
greenhouse gas and harmful carbon emissions.
Bioplastics represent a
42% reduction in carbon footprint.
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Benefits
• Cost Effective and Energy Efficient
Producing bioplastics uses 65% less energy than
it takes to produce petroleum-based plastics,
making bioplastics the energy-efficient choice.
• Easier to Recycle
Bioplastics are created from
fully biodegradable materials.
Thus, recycling them takes
much less energy.
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Drawbacks
Despite that this plastic is eco - friendly, its has not
become popular in its use mainly because • Limited Shelf Life
Bio plastics do not have a long life as they
degrade very quickly. Thus, the conventional
plastics are preferred more because of their
excellent durability and long life.
• Development of Plastic Consuming Bacteria
It is also possible that bacteria will eventually
evolve the ability to degrade synthetic plastics as
well.
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Drawbacks
• Food Shortage
Bio plastic production cannot be increased
unless there is a pressure on the food system.
Most of the corn that was used for human
consumption is now being used for making
bioplastic. Thus, there is a future possibility of
food shortage. It has drawn attention to the
importance of using non-edible plant resources
to produce bio plastics.
• Low Mechanical Strength
The mechanical strength of starch based bio
plastics is poor as compared to regular plastic.
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Thank
You !!
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