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BIO Plastic.. an alternative to current plastic…. - PowerPoint PPT Presentation

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BIO Plastic.. an alternative to current plastic…. It’s a nascent initiative to create a world which will be eco friendly………. GO GREEN !!. BIOPLASTICS or organic plastics are a form of plastics derived

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BIO Plastic.. an alternative

to current plastic….

It’s a nascent initiative to create a world

which will be eco friendly………

what are bioplastics

organic plasticsare 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.

types of bio plastics
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
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").

Starch based BIOPLASTICS
Here, the main ingredients used are -



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:


Chemistry Inside
polymers in starch

This is a long straight-chained

polymer. This is a very useful

polymer as it would give strength

to the plastic.

Polymers in Starch
polymers in starch1

This is branched. When starch is dried from an aqueous solution it forms a film due to hydrogen bonding between the chains. However, the AMYLOPECTINinhibits 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.

Polymers in Starch
process of making bioplastic
Process of making Bioplastic



giving different properties
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.

  • 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.


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.

  • 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.

  • 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.


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.

  • 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.



You !!